文章摘要： 本文将详细探讨校园二手交易平台的设计与实现过程，以及该平台所基于的技术框架。该平台是一个专门为大学生群体打造的在线二手物品交易系统，旨在提供一个便捷的交易环境，让学生能够轻松发布、浏览、搜索、收藏、下单、支付以及评价商品。系统采用流行的前后端分离架构，后端使用Java语言编写的SpringBoot框架，前端则采用JavaScript框架Vue.js。平台提供了一系列功能模块来满足用户的多样化需求，包括商品管理模块、用户管理模块、订单管理模块、支付模块以及评价模块等。 在商品管理模块中，用户可以创建商品信息，上传商品图片，设置价格和详细描述。浏览和搜索功能允许用户根据关键词、分类、价格范围等条件快速找到想要的物品。用户管理模块则负责处理用户注册、登录、信息维护以及权限控制。订单管理模块支持用户创建订单、查看订单状态以及处理订单相关的交易事务。支付模块与第三方支付接口对接，保障交易的资金安全。评价系统则允许买家在交易完成后对卖家进行评价，建立信用体系。 平台的集成数据库使用MySQL，确保数据的安全性和高效性。系统前端页面友好、操作简便，便于学生用户快速上手。此外，为了提高用户体验和系统的可扩展性，前端还集成了动态数据更新技术和响应式布局设计。整个系统的设计和实现过程中注重代码的质量和模块的解耦，便于后续的功能扩展和维护。 系统的安全性能也是一大亮点，除了数据库加密和传输加密等常规措施外，系统还实施了用户认证和授权机制，以及异常处理和日志记录机制，确保用户信息安全和交易安全。开发过程中采用了敏捷开发模式，通过持续集成和持续部署的方式，保证了系统的快速迭代和质量。 对于编程语言的选择，虽然标题中提到“python”这一标签，但根据文件信息来看，系统应该是使用Java和JavaScript语言开发的。因此，尽管标题可能有所误导，但是技术实现上，SpringBoot和Vue.js才是该平台开发的核心技术栈。 与此同时，项目还提供了相关的开发文档和说明文件，以及附赠资源，包括技术文档、用户手册、接口说明等，有助于用户更好地理解和使用平台，同时也方便后续开发人员进行系统维护和功能升级。

电源Simplis开关电源及电路仿真案例。 单 多相控制buck仿真电路。 4 8 phase COT D-CAP+ 架构仿真模型， 1-8phase PWM buck仿真模型， 峰值电流模式，D-CAP3模式等，仅供学习，参数可调，可二次开发。 支持Loadline，ZCD，TLVR，softstart等。 电源Simplis开关电源及电路仿真案例详细解析 在现代电子设备中，开关电源技术是维持设备稳定运行的关键之一。开关电源通过快速切换电路的开启和关闭状态，实现对电压的转换和调节。随着技术的发展，开关电源设计和仿真技术也日益成熟，为工程师提供了精确模拟电源性能的工具。本文档介绍的Simplis开关电源及电路仿真案例，涵盖了一系列先进的电源仿真技术和模型，具体包括单相与多相控制的buck仿真电路，以及4到8相的COT（Constant On-Time，固定导通时间）控制模式下的D-CAP+架构仿真模型。 buck转换器是一种常用的开关电源转换器，其工作原理是通过调整开关元件的导通时间来降低输入电压，并输出稳定的直流电压。在这个仿真案例中，我们不仅可以模拟单相buck电路，还能进行多相控制仿真。多相控制能够更有效地管理电流和热量，提高电源转换效率，尤其适用于高功率需求的场合。 接下来，我们来探讨COT控制模式下的D-CAP+架构。COT控制是一种开关电源的控制策略，它通过固定开关的导通时间来控制输出电压。D-CAP+架构则是COT控制模式下的一种衍生，它不仅能够提供快速的负载响应，还能保持良好的稳定性和低噪声特性。4到8相的架构仿真模型能够模拟在多种负载条件下电源的行为，这对于电源系统的设计和优化至关重要。 此外，案例中还提到了1-8相PWM buck仿真模型。PWM（脉冲宽度调制）是一种通过改变开关元件脉冲宽度来控制输出电压的技术。通过调整PWM信号的占空比，可以实现对电源输出电压的精细控制。而多相PWM buck模型可以进一步提升电源的性能，尤其在高电流应用中效果显著。 本案例中还特别强调了峰值电流模式和D-CAP3模式的仿真。峰值电流模式控制是一种电流模式控制方式，它通过监测开关元件的峰值电流来控制开关的导通时间，这种模式下电源系统响应快，稳定性高。D-CAP3模式则是最新的一种控制模式，它在D-CAP+基础上进一步优化，提供了更好的性能。 除了上述的技术点，案例还提到支持多种高级功能，例如Loadline（负载线）、ZCD（零电流检测）、TLVR（温度变化率）和softstart（软启动）。这些功能的加入，不仅使电源设计更加灵活，还大大提高了电源的适应性和可靠性。例如，softstart功能可以减少启动时电流冲击，保护电源不受损害；Loadline功能可以优化电压响应，保持在负载变动时的稳定输出。 电源Simplis开关电源及电路仿真案例提供了一个深入学习和实践先进电源控制策略和技术的平台。该平台不仅包含了多种控制模式和架构的仿真模型，还允许用户调整各种参数，进行二次开发，以满足不同设计需求。这些仿真模型和功能的集合，无疑为电源工程师提供了一套全面的分析和设计工具，从而能够更加高效地完成高质量电源设计。

基于C#实现的汇川全系列PLC Modbus TCP通信的源码库。该源码库提供了完整的通信解决方案，包括TCP连接、变量表管理、读写操作等功能。文中展示了如何将复杂协议交互封装为即插即用的模块，提供了一键操作的功能，并通过详细的注释帮助开发者理解和使用。此外，还介绍了变量表管理、面向对象的操作方法以及异常处理机制，如自动重连和指数退避等待。同时，项目内置了可视化调试工具，能够实时监控通信报文，提高问题排查效率。最后，强调了代码的实际应用效果，在汽车焊装车间连续运行6个月无故障。 适合人群：具备C#编程基础并希望深入了解PLC通信的开发人员，尤其是从事工业自动化领域的工程师。 使用场景及目标：适用于需要与汇川PLC进行Modbus TCP通信的项目，旨在简化通信开发流程，提高开发效率和稳定性。具体应用场景包括但不限于工厂自动化、生产线控制等。 其他说明：源码完全开放，注释详尽，便于二次开发和定制化改造。项目经过实际项目验证，可靠性高，适合用于生产环境。

Fake Location | | 简介 这是一款帮助开发人员调试位置信息程序的模拟工具，用于实现对位置信息、WIFI信息以及设备开发环境的调试模拟。其中大部分功能需要ROOT权限的支持。 软件特色： • 以ROOT环境运行，模拟成功率高；当然也支持免ROOT运行（NOROOT模式只对极少数应用有效） • 支持 Android P/Q/R • 支持以摇杆方式移动位置 • 支持根据当前手机朝向动态调整位置移动方向 • 支持模拟多级位置移动速度：步行、跑步、骑车、驾车、飞机以及自定义（点击速度值进行自定义输入） • 支持基站模拟，自动搜索目标位置附近的基站 • 支持路线模拟 • 支持步频模拟 • 支持WIFI模拟 • 支持独立模拟 • 支持GPS信号模拟 • 支持位置更新频率设置 • 支持位置快速切换 • 支持保存当前位置，便于快速返回 注： ROOT模式下的功能不保证适用

G1810 G2810 G3810 G4810 G1010 G2010 G3010 G4010 G1800 G2800 G3800 G4800 G1000 G2000 G3000 G4000 TS9180 TS8180 TS6180 TS5180 TS9100 TS8100 TS6100 TS5100 TS9080 TS8080 TS6080 TS5080 TS9000 TS8000 TS6000 TS5000 TR8580 TR8500 IX6580 IX6780 IX6880 IP8780 IP7280 IP2780 MB5080 MB5180 MB5480 iB4080 iB4180 MX538 MX498 MX478 MG3580 MG3680 MG5580 MG5680 MG5780 MG6680 MG7580 MG7780 MG4180 MG4280 MG5180 MG5280 MG5380 MG5480 MG6280 MG6380 MG6400 MG7180 MG8180 MG8280 MP288 MP236 MP259 E608 E518 E618......国外同款机型

标题中的“sixaxispairtoolsetup-0.3.1.zip”指的是一个名为“sixaxispairtool”的软件安装程序的压缩包版本为0.3.1。这个软件的主要功能是用于配对和管理PlayStation 3（PS3）的SixAxis或DualShock 3无线控制器在非官方的平台上，如个人电脑（PC）。让我们深入了解一下这个工具及其相关知识点。 **SixAxis控制器** SixAxis是索尼公司为PS3游戏机设计的一款无线游戏控制器。它具有六轴运动感应系统，包括三个加速计和三个陀螺仪，能够检测控制器在三维空间中的移动和倾斜。此外，控制器还配备了触摸板、动作按钮和方向键，以及摇杆。 **配对过程** 在非官方平台上使用SixAxis控制器需要通过特定的软件进行配对，这就是“sixaxispairtool”的作用。通常，连接过程包括以下步骤： 1. 安装sixaxispairtoolsetup-0.3.1.exe：这是运行在Windows操作系统上的可执行文件，负责安装所需的驱动程序和应用程序。 2. 启动配对工具：安装完成后，用户可以通过启动程序来启动配对过程。 3. 进入蓝牙设置：确保电脑开启蓝牙功能，并进入蓝牙设备设置。 4. 搜索并连接控制器：在配对工具中，搜索可用的蓝牙设备，找到并选择PS3控制器进行配对。 5. 输入配对代码：有时可能需要在控制器上输入显示在屏幕上的配对代码以完成连接。 **软件功能** SixAxisPairTool提供的功能可能包括： 1. 自动搜索和配对控制器：简化了与电脑的连接过程。 2. 管理已连接的控制器：允许用户添加、删除或重新排列已连接的控制器。 3. 更新固件：可能提供更新控制器固件的功能，以增强兼容性或修复问题。 4. 驱动支持：安装必要的驱动程序，使操作系统能够识别并处理SixAxis控制器的输入。 **兼容性** 虽然SixAxisPairTool主要用于Windows，但也有类似工具适用于其他操作系统，如Linux和Mac OS。不过，需要注意的是，非官方支持可能会受到操作系统更新或硬件变化的影响。 **安全注意事项** 在使用这类第三方软件时，应确保从可靠的来源下载，避免下载携带恶意软件的版本。同时，了解并遵守任何可能的使用条款和条件，因为使用非官方软件可能会违反PS3的用户协议。 **总结** “sixaxispairtoolsetup-0.3.1.zip”是一个用于在非官方平台上配对和管理PS3 SixAxis或DualShock 3控制器的工具。通过安装其包含的可执行文件，用户可以将控制器与电脑连接，享受游戏或进行其他需要手柄操作的应用。这个工具简化了配对流程，提供了设备管理功能，并可能包括固件更新支持。在使用过程中，应注意安全性和兼容性问题。

VCLZip Native Delphi Zip/UnZip Component! (VCLZip Lite: Version 2.23 April 14th, 2002) (VCLZip Pro: Version 3.10 Buid 1 - November 25th, 2007) IMPORTANT: If installing the registered version, please be sure to always re-install/rebuild the components (VCLZip and VCLUnZip) to the component pallette (or rebuild the design time package) so that the ThisVersion property and any other new properties will be properly updated. If your application still does not run without the IDE, open up VCLZip's package, click on options and look at the Directories/Conditionals tab. If KPDEMO is defined, remove it and recompile the package. ***IMPORTANT: Please remember do not install these components into a package by the name of either VCLZip or VCLUnZip. You will receive an error if you do. PLEASE TAKE A LOOK AT THE "WHAT's NEW IN THIS VERSION" LINK IN THE HELP FILE AS IT HAS CONVENIENT LINKS TO ALL OF THE NEW TOPICS. ==================== Version 3.10 Build 1 - Several bug fixes. - Added support for Delphi 2006, 2007 - Added support for BCB 2006, 2007 - Improved memory performance when working with archives containing extremely high number of compressed files. ==================== Version 3.06 Build 2 Made Delphi 2005 compatible Other assorted fixes ==================== Version 3.05 Build 1 Fixed a lot of incompatabilities between VCLZip and WinZip Other assorted fixes ==================== Version 3.04 Build 1 New ZLib methods for optimized compression and decompression of single entities of data in standard ZLib format, without the overhead of the PKZip format. This is excellent for compression of data to be sent across the net, compressing web pages (http compliant compression), blobs, etc. - ZLibCompressStream - ZLibDecompressStream - ZLibCompressBuffer - ZLibDecompressBuffer - ZLibCompressString - ZLibDecompressString Overloaded TStream Methods for Delphi 4,5, BCB 4, and 5 - UnZipToStream - UnZipToStreamByIndex - ZipFromStream Special OnGetNextTStream Event for Delphi 4,5, BCB 4, and 5 - Allows zipping multiple TStreams in one process - More efficient than calling ZipFromStream multiple times Capability to use the latest version of ZLib 1.2.1. - VCLZip currently uses 1.4.1 by default. - By defining ZLIB121, VCLZip will use the latest version of ZLib which is included with the registered version. Some optimization improvements which should show some improvement in zipping and unzipping speed when using TkpStreams with D4, D5, BCB4, and BCB5. ============ Version 3.03 (VCLZip Pro) - Please test your application thoroughly with this new version of VCLZip Pro. While it has been tested and has even been used in at least two production applications for several months now prior to initial release, there are so many combinations of property settings, environment differences, and ways to use VCLZip that you should always test VCLZip completely in your application before deploying. *** New Zip64 capabilities, properties, methods and events: - Uncompressed, Compressed, and Archive file sizes can be up to 2^63-1 bytes in length. - You can compress up to 2147483647 files into an archive. This is compatible with PKZip's Zip64 format. - If a file does not extend beyond any of the original limitations (filesizes of 4 gig or 65535 files) then no Zip64 format information is included in the archive. - property isZip64 - tells you when you are working with a zip file that is using Zip64 format. Much faster processing due to linking to Zlib object files for compression and decompression routines. Blocked Zip Files (spanned zip archives split onto hard drive) - Now completely compatible with PKZip and WinZip split archives file naming format. - For backwards compatability you can tell VCLZip to use the old VCLZip filenaming format by using the BlockMode property. - New method OnFileNameForSplitPart called just before each split filepart is created. VCLZip supplies a default implementation of this method so for most purposes you won't need your own. - method DefaultFileNameForSplitPart - VCLZip calls this internally if you don't define your own OnFileNameForSplitPart. You can also call it from your own OnFileNameForSplitPart if you wish to add some processing to the default behavior. - property BlockMode - determines whether VCLZip uses PKZip/WinZip standard naming convention or VCLZip classic method. - method DefaultGetNextDisk - VCLZip calls this internally if you don't define your own OnGetNextDisk. You can also call it from your own OnGetNextDisk event if you wish to add some processing to the default behavior. - Properties for controlling which files are zipped... - IncludeHiddenFiles - default False; - IncludeSysFiles: - default False; - IncludeReadOnlyFiles: - default True; - IncludeArchiveFiles: - default True; - Event OnGetNextStream - Allows you to zip from multiple streams when using the ZipFromStream method. This improves performance since repeated calls to ZipFromStream causes the archive to be updated on each subsequent call. - property ThisBuild - Tells you the current build. See also ThisVersion - property OnHandleMessage - Handles interactive messages with VCLZip. There is a default, so you don't need to define your own unless you wish to eliminate interactive messages and handle them on your own. This is helpful if you are using VCLZip as a service or on a webserver for instance. ******** Upgrading existing applications that use VCLZip 2.X ********** For the most part, existing applications will work as-is. Just install VCLZip 3.X and recompile your code. Here are some things to be aware of though... 1) If your app currently creates mmBlock archives (spanned directly to hard drive) and you define your own OnGetNextDisk in VCLZip 2.X, you should move your code from this event that handles mmBlock events to the new event OnFileNameForSplitPart. However, if you simply rely on VCLZip's default OnGetNextDisk then you don't have to worry about this. 2) If your app creates mmBlock archives, the default naming convention has changed to match the PKZip/WinZip standard. If you wish to keep the same naming convention then set BlockMode := mbClassic. 3) OnGetNextDisk and OnPrepareNextDisk events are called for the 1st disk now. VCLZip 2.X only calls these events starting with the 2nd disk. 4) properties CompressedSize[Index], UncompressedSize[Index], ZipSize are now Int64 types. 5) Delphi 4, Delphi 5, BCB 4, and BCB5 are all capable of using the Zip64 format. However they use the TkpHugeStream decendants which act just like TStreams except they handle files/stream sizes larger than 2gig. There is a TkpHugeFileStream and a TkpHugeMemoryStream which should handle 99% of all necessary actions. If you currently work with VCLZip 2.X with TBlobStreams or some other type of streams, you can either define your own TkpBlobStream for instance which inherits from TkpHugeStream, or use the TkpHugeStream.CopyFrom(TStream, Count) and the TkpHugeStream.GetStream: TStream methods to give VCLZip your stream and get it back. Ofcourse when using regular TStream decendants in D4,4,BCB4,and 5, you cannot create Zip64 archives. If you use Delphi 6, 7, or BCB 6, you don't have to worry about any of this as the normal TSTream is used by VCLZip and handles large file/stream sizes. ============ Version 2.23 (VCLZip Lite) Added the OEMConvert property. Filenames stored in a PKZip compatible archive normally go through an OEM conversion to make them ascii compatible. When opening the zip file the conversion is undone. If you do not plan on having other zip utilities opening up your archives this conversion process is not really necessary. Setting this property to False will eliminate this process. The default value for this property is True for normal PKZip compatability. Added OnEncrypt and OnDecrypt events. These allow you to replace the standard pkzip encryption with your own. Data is passed to these events a buffer at a time. Use this with care as this is still somewhat experimental and I'm not sure how useful it is yet. You must make all changes within the buffer sent in to you. Treat the entire file as a stream. Byte for byte replacement only. No additional keys can be saved. Added OnRecursingFile event. Sometimes when using wildcards and recursing directories, there was no reporting of progress. This will be fired each time a file matches as the file list is being built while recursing directories. Added the EncryptBeforeCompress boolean property. The default for this property is False and if left like this VCLZip will behave like normal. If set to True, VCLZip will encrypt each buffer prior to compressing it instead of afterwards. This will cause files to not be decryptable by normal zip utilities thereby adding a bit of extra security. Bugs Fixed: IMPORTANT!!! Behavior of freeing the ArchiveStream (compressed stream) has been modified. VCLZip will now no longer try to free ArchiveStream, you must free it yourself. This was due to a problem where it would be freed automatically if there was a problem with the ArchiveStream when trying to open it as a zip file (possibly corrupt). Best practice is that ArchiveStream should always point toward a TMemoryStream that you create anyway. Modified the SFX code (the code used to create the SFX stub distributed with VCLZip) so that it handles filenames that have been run through an OEM Conversion. The SFX was losing accented characters. This modification means that if you are creating zip files to be used as SFX's you will want to leave the OEMConvert property mentioned above, set to it's default value of True. Modified so that when cursor is changed to hourglass by VCLZip, previous cursor is saved correctly instead of just changing it back to default cursor. Now saves Central Directory Extra Fields correctly. Fixed the SFX code so that it works properly if you use Copy /B to concatenate a zip file to the stub. Due to a Delphi strange behavior sometimes path names for directory only entries would become corrupted. Removed reference to QConsts, replaced with RTLConsts. Sometimes a GPF would result if a corrupt zip file was opened. Using a wildcard in pathname added to FilesList did not work. Using '*.*' as a wildcard in files added to FilesList now is the same as using '*'. VCLZip will now check for CancelTheOperation during initial building of the fileslist instead of just during compression processing. Added a final call to OnTotalPercentDone with 100% because this didn't always happen. Attributes were not getting set correctly for directory-only entries. Fixed a problem that was not allowing ZipComment's to be added correctly to spanned or blocked zip files. Not the same fix as in 2.22. Directories (directory-only entries) were not being restored properly unless DoAll was True. You were unable to delete a directory from which files were recursively zipped until exiting your application. ============ Version 2.22 Now Delphi 6 compatible. New event called {link=93,OnRecursingFile} which gets called as VCLZip recurses directories searching for files that match a wildcard that is entered in the FilesList. This gets called each time a file matches the wildcard. Fixed a bug which kept diskettes from being labeled when creating spanned zip files on WIN31. Fixed a bug which sometimes did not allow zip comments to be added to blocked zip sets. Fixed a bug which caused VCLZip to not properly handle the IncompleteZip exception on spanned zip sets unless you called ReadZip prior to calling UnZip. Version 2.21 (Changes are shown in the build stages as they were implemented) Pre-Release Build 5: When working with temporary files, VCLZip will now rename, instead of copy, the temp file if the destination is on the same drive. This will speed up the adding of files to an existing zip file when the resulting zip file is very large. Pre-Release Build 4: New event called OnPrepareNextDisk which is an event that will allow you, when creating spanned zip files across diskettes, to do things like format a diskette that has just been inserted, or to add or delete files from the diskette before continuing with the zipping process. Fixed a problem that was causing the CancelTheOperation Method to not work properly. Pre-Release Build 3: Fixed bug which caused VCLZip to miscalculate space needed for zfc file if wildcards are put into the FilesList. Fixed bug so you could have FilePercentDone without needing TotalPercentDone when creating spanned zip files Fixed so relative_offset set correctly for spanned zips. Side effect of removing needless write of header. Added code to read local fileheaders if exception thrown when reading a central fileheader. Fixed problem where directories couldn't be created from directory entries because the fullpath wasn't known yet. Result of having moved this code to earlier. Fixed typo in creation of LOC header values which could cause error if reading local headers. Changed so Zip Comment starting position is calculated based on end of central record instead of end of file. Pre-Release Build 2: IMPORTANT: Changed default for FileOpenMode back to fmShareDenyNone as it had been for all but version 2.20. Fixed a problem where drivepart (i.e. C:\) was not being stripped when saving relative paths. Added a BufferedStreamSize property which can increase the speed of creating zips to floppy (and other slow media) dramatically. The new default for this should increase the speed by as much as 3 times, but you can now tweak this especially for your application! Added an ImproperZip property which gets set when VCLZip detects an inconsistency with the zip. This can be useful for detecting when VCLZip was able to open the zip in spite of an inconsistency found. There was no way to know this in the past. Fixed a problem where zip comments in zfc files were not being read correctly. Added a setZipSignatures procedure which allows you to modify the signatures of your zip file. This will cause other zip utilities to not be able to recognize or read your zip files created with VCLZip. Useful if you want to add further security to your zip files. Pre-Release Build 1: Some zip files would not open correctly, throwing an incomplete zip file exception due to an erroneous "extra field length" identifier in headers of some compressed files. These zip files are rare, but a very few people seemed to have several of them. This problem would not affect zip files created by VCLZip, and this problem should only occur in VCLZip 2.20, not in any previous version. If you had Range Checking turned on, VCLZip would get a range check error when using a wildcard that ended with a * as in 'somefile.*'. Under certain circumstances, drive information would not be stripped from path information if zipping recursively (including subdirectories) "Retrying" to zip a file that could not be opened using the OnSkippingFile event would not always work correctly. Creating spanned zip set to floppy should be faster now due to removing a needless header write to disk for each file. VCLZip would not compile correctly with MAKESMALL defined. Added code to make VCLZip work with BCB5. Haven't tested this yet though since I don't have BCB5 myself yet. Added readonly boolean ImproperZip property which will be set to True when some sort of problem is found when opening the zip file, even if recoverable. This property will be enhanced and refined in the future. If KeepZipOpen is set to True, when putting in the wrong disk in a spanned zip set, VCLZip would not always properly close the file on the old diskette before trying to open the file on the next diskette. Added ECantWriteUCF exception which will be thrown if VCLZip runs out of room to write the uncompressed file when unzipping. Timestamp was not being set properly when unzipping readonly files. Moved setting of the timestamp to before the attributes get set. ============ Version 2.20 Changes have been made in the following areas: --Performance There are a few code optimizations that should speed up the zipping process slightly. --Spanned Zip Files A new feature, turned on with the SaveZipInfoOnFirstDisk allows VCLZip to create and read spanned zip files starting with the first disk instead of the normally required last disk of the spanned disk set by saving a Zip Configuration File on the first disk. This feature can be used even if creating the spanned zip file directly to your hard drive. A new property, SaveOnFirstDisk, allows you to save room on the first disk when creating a spanned zip file, to allow room for other files, such as setup programs, data files, or a Zip Configuration File. Spanned zip files can now be directed toward disks greater than 2 gig in size as long as you are using Delphi 5 or BCB 4. --UnZipping The new Selected indexed property offers another way to flag files to be unzipped. Files that have the Selected property set to True can be unzipped using the UnZipSelected method. The Selected property will be cleared (set to False) for each file as it is unzipped, but you can also call the ClearSelected method to clear them all. At anytime the NumSelected property can be checked to see how many files have been selected. Also, the UnZipToBufferByIndex and UnZipToStreamByIndex methods allow you to unzip files specified by their index instead of by name or wildcard. The BufferLength property allows buffered output (buffer smaller than the total uncompressed filesize) when unzipping directly to memory (see UnZipToBuffer and UnZipToBufferByIndex). This will cause the OnGetNextBuffer Event to be called everytime BufferLength bytes have been output by VCLZip. Modified to work in all ways with zip files that have "extra fields" in their headers. These tend to be quite rare, but they do show up from time to time. --Zipping Added a property called FileOpenMode which allows you to define the file open mode for files when they are opened to be zipped. Added a Retry parameter to the OnSkippingFile Event that can be used to re-attempt to open a file for zipping that is open by another process. This gives the chance to close the file and continue with the zipping process rather than having to start over again. Added a ENotEnoughRoom exception which will be thrown if there is not enough room to write to the archive, i.e. out of disk space. The new OnUpdate Event gets fired when updating or freshening an existing archive. It is triggered for each file that already exists in the archive as it is either replaced or kept in the updated archive. The AddDirEntriesOnRecurse will cause separate directory entries to be included in archives when doing recursive zips through subdirectories. --Integrity Checking A new method, CheckArchive, will perform an integrity check on all files in an archive. This is much faster than using FileIsOK on each file if testing all files in an archive with VERY MANY files. Further improved checking for corrupted zip files when opening zip files. --Encryption The following new properties and methods allow lower level work with password encrypted archives: DecryptHeader Gets the decryption header for a particular compressed file in an archive GetDecryptHeaderPtr Same as DecryptHeader but easier to use in BCB. DecryptHeaderByte Method Tests a password against the decryption header found in the DecryptHeader property. GetDecryptHeaderByteByPtr Same as DecryptHeaderByte but easier to use in BCB. --Self Extracting Executables Changes were made to the ZIPSFX32.BIN stub itself: - Modified to work with zip files containing "extra fields" in their headers. - Modified to change mouse cursor to an hour glass during processing. - Check for correct file size is now done automatically - Now uses the end of central and central headers to find the first local header. - Added a progress meter - Better checking for corrupted zip files. - Added an information window that can optionally be shown when the sfx is initially started up. - Added an AutoRun option to make the sfx stub run automatially when double clicked with no other interaction from the user. For the new modified sfx stub, ZIPSFX32.BIN, instead of using kpSFXOpt, you should now use the TSfxConfig component to set the options for the sfx stub. The new sfx can be found in the sfx\ subdirectory as usual and is called ZIPSFX32.BIN and the original sfx can be found in the same subdirectory except it is now called ORGSFX32.bin. Just rename it if you prefer that one (use KPSFXOPT instead of TSfxConfig with the old stub). --Miscellaneous The installation is now easier, atleast for first time installers of the source code. The .DPK files for Delphi and .CPP files for BCB are now included. Now these files simply have to be compiled and that's it. There is a separate option in the installation for installing to the different versions of Delphi and BCB. Added a property called FlushFilesOnClose which will cause all files opened for write by VCLZip to have their disk buffers flushed to disk when closed. Added the capability to delete Selected files from an archive using the DeleteEntries Method. The behavior of the OnInCompleteZip Event has been greatly improved. You can now use this event to ask the user to insert the last disk of a spanned disk set rather than having to handle this situation from outside VCLZip. The register procedures were changed so that the components now get installed to the "VCLZip" tab on the palette. I found that for all but Delphi 1 I had to actually manually move the components to the "VCLZip" tab. You may find that you have to do this too if you have already installed VCLZip before. The components now use new bitmaps in place of the old ones on the component palette. Separated many compiler defines into a new file called KPDEFS.INC. ==================================== Version 2.18: 1) Thanks to the hard work of a fellow registered user, added the capability to remove all dependencies on the Dialogs, Forms, Controls, and FileCtrl units by defining the conditional MAKESMALL, which results in a smaller footprint. This can be quite useful when putting VCLZip into a DLL for instance. In order to make this work, go into your Project | Options and select the Directories/Conditionals tab and enter MAKESMALL in the conditional defines text box. In Delphi you can add this conditinal define to the project options of your application that uses VCLZip and then do a "build all". In BCB you will have to add this to the project options of the package that contains VCLZip and then rebuild the package. If you define MAKESMALL, the only things you lose are: a) ZIP file open dialog box that appears when the ZipName is set to "?" b) Select Directory dialog box that appears when the DestDir is set to "?" c) Changing the cursor to an hour glass during some operations. d) No long filename support in Delphi 1 2) Made VCLZip completely BCB4 compatible. 3) Added some exception handling to KPUNZIPP and KPINFLT, mainly to handle unexpected situations when wrong passwords are entered. This fixes the problem with PRP, the password recovery program. 4) For Borland C++ Builder, changed any COMP types to double, getting rid of the compiler warnings for unsupported comp type. This affects the OnStartZipInfo and OnStartUnZipInfo events, so you'll have to change the comp parameter to double in these events if you use them (in both your header files and in the CPP files). 5) Modified OnStartUnZip event so that FName (the filename of the file that is about to be unzipped along with complete path) is now a VAR parameter and can be modified. This allows you to change the path and name of a file that is about to be unzipped. This is especially helpfull in applications like Install Programs. NOTE: You will need to change your current code to add the VAR to the event definition and implementation if you already use this event in your application. (In BCB, add a & just before the parameter instead of VAR) 6) Moved many type definitions to VCLUNZIP.PAS so that kpZipObj won't have to be included in your USES list. 7) Fixed bug that caused GPF when setting Zip Comment to '' (empty string). 8) Moved strings in VCLZip/VCLUnZip into a string table, making the code size a little smaller as well as making it much easier to localize string information. However you have the option of not using the new string table, for whatever reason, by defining NO_RES in your project options (in the conditional defines text box on the Directories/Conditionals tab). 9) Removed the need for several files. No longer included are kpstrm.res, kpstrm.rc, kpsconst.res, kpsconst.rc, kpstres.pas, and for Delphi 1, kpdrvs.pas. In some cases the need for these files was eliminated and in other cases just rolled into the newly included kpzcnst.rc, kpzcnst.pas, and kpzcnst.res. Definining NO_RES in your project options will elimiate the need for these new files but will make your code size slightly larger and you won't be able to localize your application without changing VCLZip source code. 10) Modified the OnFilePercentDone and OnTotalPercentDone progress events to work better when creating spanned disk sets and blocked zip sets. They no longer report 100% when the compressed file still has to be copied to disk. 11) Added the ReplaceReadOnly property. Setting this to true will allow files with the ReadOnly attribute to be replaced during the unzip process. 12) Added the ifNewer and ifOlder options to the OverwriteMode property. (This had somehow made it into the help file but not into VCLUnZip) 13) Added the SFXToZip method which will convert an SFX file to a regular zip file. The header pointers will be properly adjusted during the conversion. 14) Fixed a problem where the OnGetNextDisk event would always revert to the DefaultGetNextDisk method instead of what you entered into the Object Inspector each time your project was re-opened. 15) Fixed a bug that caused CRC errors when unzipping files from spanned disk sets if they were STORED (no compression) and spanned across disks. 16) Added the OnZipComplete and OnUnZipComplete events. If defined, these will fire at the very end of a zip or unzip operation (after all files have been processed, not after each file). These events will rarely be used since, normally you will be able to do the same thing at the point that the call to Zip or UnZip returns, but these events can be useful when using VCLZip in threads where in certain circumstances the return from the Zip or UnZip methods are not seen. 17) Creation of SFX files has never been easier!!! The addition of the MakeNewSFX method allows you to create Self Extracting Executables without the need to create a zip file first. The files that you specify in the FilesList property will be zipped, using all the normal VCLZip property settings, and the SFX will be created, all in one step! In addition, you can create configurable SFX files using this method, and you can do this especially easy by adding the new unit kpSFXOpt to your application's USES list and using the new 32bit SFX stub that is now distributed with VCLZip. This allows you to easily set things like SFX Dialog caption, default target extraction directory, file to launch after extraction, etc. 18) Fixed a memory leak that only affects applications using VCLZip that are compiled with Delphi 2, and that use wildcard specifications in the FilesList property. Version 2.17a: 1) Fixed a bug that was keeping VCLZip from reading truncated zip files or sfx files that did not have their headers adjusted. 2) Fixed a bug that was causing a directory to be created on the C drive when doing integrity checking with the FileIsOK property. 3) Added {$V-} to kpZipObj.PAS 4) Moved two AssignTo methods to public instead of private in kpZipObj.PAS Version 2.17: 1) Added Memory zipping and unzipping capabilities through the UnZipToBuffer and ZipFromBuffer methods. See the documentation for these methods in the Help File for more information. 2) New FileIsOK Property allows you to check for the integrity of individual files within an archive without actually unzipping the file. 3) Fixed a bug that kept checking of volume labels from working on WIN31 when working with spanned disk sets. 4) Removed all references to ChDirectory so that VCLZip will be more thread safe allowing separate instances of VCLZip in separate threads to be performing zip/unzip operations at the same time. 5) A new public property PreserveStubs allows you to make modifications to sfx archives and have the archive remain an SFX rather than revert back to a normal zip file. 6) Added a default OnGetNextDisk event. If one is not defined, then the default event will be called when the situation arises that a new disk is needed when zipping or unzipping a spanned or blocked zip archive. 7) Added more power to the wildcard capabilities. Now you can qualify the * wildcard character, for instance: * would satisfy any number of contiguous characters as long as they are all a thru e. * would satisfy any number of contiguous characters as long as none of them were a thru e. This allows you to do things like include files in specific direcories into your ExcludeList. For instance: VCLZip1.ExcludeList.Add('c:\test\*.txt') would exclude the zipping of all .txt files in the test directory but not in any subdirectories. 8) Fixed other minor bugs and made other code enhancements. Version 2.16: ***Please be aware that if you currently use the OnSkippingFile event in any of your applications, version 2.16 will require a small modification as this event has an added parameter and one of the current parameters is used a little differently when being called by the zip operation. Please see the help file for more information. 1) The OnSkippingFile Event has been changed slightly, adding a parameter for the filename. 2) OnSkippingFile is now called when a file to be zipped is skipped because it is locked by another application. See the Help File for more information. 3) Fixed a bug with the Exclude and NoCompressList where they were ignoring entries with anything before the extention (i.e. 'somefile.*' as opposed to '*.zip') if you were saving directory information. 4) Fixed a bug that caused an error if you added a wildcard with a non-existent directory to the FilesList. 5) A few other minor bug fixes. Modifications for 2.15 include: 1) PackLevel can now be set to 0 (zero) which means no compression at all (STORED only). 2) New property ExcludeList is a new stringlist that you can add filenames and wildcards to in order to specify files that you do not wish to be included in an archive. 3) New property NoCompressList is a new stringlist that you can add filenames and wildcards to in order to specify files that you wish to be STORED with a PackLevel of 0 (zero), no compression. 4) All compiler warnings and hints were removed. Modifications for 2.14 include: 1) Delphi 4 compatability. 2) Added ability to use complex wildcards when specifying which files are to be zipped. This includes wildcard characters not only in the filename but also in the pathname. This allows you to specify directories using wildcards, for instance: VCLZip1.FilesList.add('c:\test\w*\mycode*.pas'); would get all PAS files beginning with mycode in subdirectories under TEST that begin with the letter w. Wilcards may be much more complex than this. Please see the help file for more information. 3) Added the ability to override the RECURSE property setting when specifying files to be zipped. By adding the following characters to the beginning of the filenames being added, you can override whatever the current setting is for the RECURSE property: '>' will force recursion into subdirectories '|' will force NO-recursion For instance: VCLZip1.FilesList.add('>c:\windows\*.ini'); will get all .ini files in and below the windows directory reguardless of what the recurse property setting is. and: VCLZip1.FilesList.add('|c:\windows\sys*\*.dll'); will get all .dll files in subdirectories of the windows directories that start with 'sys' but will not recurse into any directories below the sys* directories. 4) The [ and ] characters previously used as special wildcard characters have been changed to < and > since [ and ] are valid filename characters. If you still need to use the previous characters for backward compatability, I can show registered users how to easily modify a couple of constants in the source code in order to go back to the old style. See "Using Wildcards" in the help file for more information. 5) A few bug fixes. Modifications for 2.13 include: 1) New property ResetArchiveBitOnZip causes each file's archive bit to be turned off after being zipped. 2) New Property SkipIfArchiveBitNotSet causes files who's archive bit is not set to be skipped during zipping operations. 3) A few modifications were made to allow more compatibility with BCB 1. 4) Cleaned up the Help File some. 5) KWF file now works for Delphi 1 and Delphi 2 again. Still can't get context sensitive help in Delphi 3. 6) Cleaned up some of the code that was causing compiler warnings and hints. Modifications for 2.12 include: 1) Added a TempPath property to allow the temporary files path to be different from the Windows default. 2) Modified VCLZip so that any temporary files that are created receive a unique temporary filename so as not to clash with any other files in the temporary directory. This also allows working with zip files residing in the temporary directory. 3) Fixed a bug in the relative path feature. 4) Fixed a bug that caused a "list out of bounds" error if a file in the FilesList did not actually exist. Modifications for 2.11 include: 1) Fixed password encryption bug for 16 bit. 2) Fixed "invalid pointer operation" when closing application bug. 3) Fixed path device truncation bug which caused inability to modify existing archives in 16 bit. 4) Fixed inability to cancel during wilcard expansion bug. 5) Added capability to better handle corrupted timestamps. 6) Added capability to open and work with SFX files that were created with the COPY/B method (header files not adjusted). 7) Other small bug fixes. I'm still working on a bug which causes a GPF when continually unzipping the same file thousands to millions of times. This mainly affects programs like the Password Recovery Program (PRP) which uses the brute force method of searching for an archive's password. Modifications for 2.10 include: 1) Capability for 16bit VCLZip to store long file/path names when running on a 32bit OS. 2) New property (Store83Names) which allows you to force DOS 8.3 file and path names to be stored. 3) Better UNC path support. 4) Fixed a bug to allow files to be added to an empty archive. Modifications for 2.03 include: 1) Volume labels now get written correctly to spanned disk sets in Delphi 1 for all versions of Windows. 2) Delphi 1 VCLZip now correctly recognizes when it is running on Windows NT. 3) Fixed a problem with zipping files in the root directory when StorePaths = True. 4) File and Zip Comments are now read correctly from spanned/blocked zip archives. 5) Fixed a buf that was causing "Duplicate Object" errors. Modifications for 2.02 include: 1) Fix for file comments which were supposed to be fixed in version 2.01 but weren't. 2) Fix for stream zipping. Version 2.01 would not create a new archive if using a stream. (The Stream Demo now allows creating new zip files to streams too) 3) A few other minor modifications to further solidify the code. 4) A modification to the Zip Utility Demo which allows unzipping from Blocked zip files as if they were single zip files. 5) Added a read-only, published ThisVersion property which reflects the version of the VCLZip/VCLUnZip that you are currently working with. Modifications for 2.01 include: 1) Fixes for exceptions that were caused when CANCELING a zip or unzip of a spanned zip file. 2) Fix for a possible problem when zipping or unzipping a spanned zip file when one or more of the compressed files resided on more than 2 of the spanned parts. 3) Fix for file comments which were broken in version 2.00. Additional features for version 2.00 include: 1) Modify/Add internal file details (filename, pathname, timestamp, comment) for any file while zipping, in the OnStartZip event. 2) Add an Archive Comment while zipping in the OnStartZipInfo event. 3) Delphi 1 compatiblity for VCLZip. 4) Stream to Stream Zipping - Archives themselves can now be TStreams! 5) New Relative Path Information option. 6) Unzip archives that weren't zipped with the Relative Path option turned on as if they had been by determining how much path information to use with the Rootpath property. 7) Modify timestamps for files in existing archives (you could already modify filenames and pathnames for files in existing archives) 8) The OnBadPassword event now allows you to supply a new password and try the same file again when unzipping. 9) Source code has been cleaned up so that it will compile under Borland C++ Builder with no modifications. Also some bugs were fixed, most importantly: 1) An empty file, that had been compressed into an archive would cause any file added to the archive to cause the archive to approximately double in size. Any archives containing empty files are not corrupted, they are OK. This was simply a fix to the way the archive was processed. 2) After creating an SFX file, you had to close the zip file before you could modify it in any way, otherwise a stream read error was encountered. See the Help file for more information on new features. This zip file is part of a self contained installation program. Just run it and the installation program will begin. Contact vclzip@bigfoot.com for further information Thanks! Kevin Boylan

【全国电子离线地图】是一种特别适用于内网环境使用的资源，它允许用户在没有网络连接的情况下查看和使用地图数据。这种地图系统对于那些网络不稳定或无法访问互联网的地区尤其有用，比如偏远地区或者网络受限的环境。由于文件体积较大，下载前需考虑存储空间和下载时间，但对于需要频繁查询地理位置、规划路线或者进行地理分析的用户来说，其价值不可忽视。 全国电子地图通常包含了我国各个级别的地理信息，从省级到市级，甚至到区县级，覆盖了广泛的地理特征，如道路网络、水系、地形、行政区域划分、交通设施、公共建筑等。这些信息通常以矢量图层的形式存在，可以缩放而不失真，同时可能包含卫星图像或者航拍照片作为背景图层，提供丰富的视觉效果。 离线地图的制作过程涉及到地理信息系统（GIS）技术，它通过将大量地理数据进行处理、整合，然后压缩成适合存储和快速检索的格式。常见的离线地图格式有MBTiles、GeoPackage、Shapefile等，这些格式能够有效地存储和管理空间数据，同时支持多种地图服务功能，如标注、搜索和路线规划。 在使用全国电子离线地图时，你需要一个兼容的应用程序或软件来读取和显示这些地图数据。这类软件可能包括专业的GIS工具，如QGIS、ArcGIS，或者专门为手机和平板设计的地图应用，例如Mapbox、Osmand等。这些应用程序允许用户浏览地图、进行定位、查找地点、规划路径，甚至进行地理数据的分析和编辑。 对于内网环境，离线地图的优势在于数据的安全性和可控性。由于数据不依赖于外部网络，因此不会受到网络攻击或者数据泄露的风险。同时，由于所有地图信息都在本地，加载速度会比在线地图快，用户体验更流畅。 然而，由于文件较大，下载和更新全国电子地图可能需要较长时间和较大的存储空间。因此，在选择下载前，用户应评估自己的需求和设备条件，确保有足够的存储空间，并合理安排下载时间。同时，由于地图数据需要定期更新以保持准确性，用户还需关注地图的更新频率和获取新版本的途径。 全国电子离线地图是一种实用的地理信息资源，特别适合在网络环境有限的条件下使用。它提供了全面、详细的地理信息，可以满足从日常生活导航到专业地理分析的各种需求。虽然文件较大，但其带来的便利性和安全性使得它在许多场合下成为理想的解决方案。

RedNotebook是一款流行的日记本应用程序，它支持Linux操作系统。本次提供的压缩包文件名为“rednotebook-2.29.6-1.el8.tar.gz”，它是指定版本的RedNotebook软件包，适用于CentOS 8操作系统。CentOS是一个与Red Hat Enterprise Linux（RHEL）完全兼容的免费Linux发行版，旨在提供一个企业级的开源计算环境。 从描述中可以看出，该软件包的安装流程包括两个主要步骤。第一步是解压操作，需要使用“tar”命令。具体操作是使用“tar -zxvf”命令配合相应的文件名来解压压缩包。这里的“-z”表示解压通过gzip压缩的文件，“-x”表示从tar归档文件中提取文件，“-v”表示显示详细的处理信息，“-f”后跟文件名，即指定要处理的归档文件名。例如，解压命令将会是“tar -zxvf rednotebook-2.29.6-1.el8.tar.gz”。 第二步是进入解压后的目录，并执行安装。由于该文件名包含了“el8”后缀，这通常意味着它包含了一系列的RPM（Red Hat Package Manager）软件包，这是Red Hat及其衍生系统如CentOS用于安装和管理软件包的一种格式。安装命令使用的是“sudo rpm -ivh”，其中“sudo”表示以超级用户权限执行命令，“rpm”是管理RPM软件包的工具，“-i”表示安装一个包，“-v”表示显示安装过程中的详细信息，“-h”表示在安装过程中打印出井号（#），以显示进度。星号“*”用于匹配目录中所有的rpm文件，以便批量安装。因此，安装命令将会是“sudo rpm -ivh *.rpm”。 压缩包内仅包含一个文件名为“readme.md”的文档，这表明该软件包可能还处于测试或预发布阶段，或者该软件采用了简化打包的方式。Markdown格式的文档通常包含软件的基本使用说明、功能介绍、配置方法以及可能遇到的常见问题解答等信息。用户应仔细阅读readme文档来了解RedNotebook的详细安装和使用指南。 由于RedNotebook是面向个人用户的日记管理软件，它可能具备一些独特的功能，比如日志记录、标签分类、模板管理以及搜索功能。此外，由于它是开源软件，用户可能会对源代码感兴趣，并根据自己的需要进行定制和改进。 对于熟悉Linux操作系统的用户来说，使用RedNotebook这样的开源软件可以更加安全、灵活地管理个人笔记。考虑到它专为CentOS 8设计，其在该系统上运行会更加流畅和高效，同时也反映出开发者对Linux生态系统的持续投入和优化。而对于新手用户，如果想要获得最佳的使用体验，建议按照官方的安装指南逐步进行操作，并在过程中仔细阅读readme文档以掌握相关知识。

在现代科技领域，数码显微镜与电子目镜已经成为科学研究、工业检测以及教育领域不可或缺的工具。本资源包“300万数码显微镜及电子目镜驱动程序和应用软件”提供了完整的解决方案，旨在帮助用户充分利用这类设备的功能，实现高效、精确的观察和分析。 300万像素的数码显微镜代表着高清晰度的成像能力。300万像素意味着在捕获图像时能提供高达2048x1536的分辨率，这使得细节得以清晰呈现，尤其适合对细微结构进行分析。在生物学、材料科学、半导体制造等领域，高分辨率的图像能够帮助研究人员发现并理解微观世界的特征。 电子目镜则是一种通过显示器替代传统目镜的设备，它将显微镜的图像实时显示在屏幕上，便于多人同时观看，也解决了长时间观察导致的眼部疲劳问题。此外，电子目镜通常支持图像记录和分析功能，为科研和教学提供了便利。 驱动程序是连接硬件设备与操作系统的关键，对于300万数码显微镜及电子目镜来说，安装正确的驱动程序至关重要。驱动程序负责解析设备发出的信号，并将其转化为操作系统可理解和处理的形式，确保设备正常工作。安装过程中需注意设备与电脑的兼容性，以及操作系统版本是否匹配，以确保驱动程序的稳定运行。 应用软件则是设备功能的延伸，通常包括图像捕捉、处理、测量、存储等功能。例如，用户可以通过软件调整显微镜的放大倍率、亮度、对比度等参数，优化观察效果；也可以进行实时录像，记录动态过程；甚至进行精确的尺寸测量和分析，辅助科研或质检工作。这些软件往往还具备批处理和分享功能，方便用户整理和交流研究成果。 压缩包中的文件名称虽然没有具体列出，但可以推测包含了驱动程序安装文件、应用软件的安装程序、可能的用户手册和快速启动指南等。安装时应按照步骤操作，先安装驱动程序，再安装应用软件，确保设备能被系统识别并正确配置。使用过程中遇到任何问题，可以查阅用户手册获取帮助，或者联系技术支持获取进一步的解决方案。 “300万数码显微镜及电子目镜驱动程序和应用软件”这套资源提供了全面的支持，无论是设备的连接与设置，还是后期的数据处理与分析，都能得心应手。在使用过程中，充分理解和掌握这些工具的功能与操作，将极大地提升工作效率和科研质量。