医药行业：第五批全国集采开标，对制药企业影响逐渐转正（附港股制药企业市场份额梳理名单）浦银国际（13页）.pdf
2022-01-28 18:02:01
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vue3.0+element-plus实现国际化语言，动态路由菜单demo
2022-01-27 14:02:06
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5G系统设计中涉及的关键技术及相应的国际标准化内容，其中空口技术部分主要涉及初始接入设计、控制信道设计、大规模天线设计、信道编码、NR与LTE共存几个主要部
2022-01-27 09:09:56
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CAN总线在ISO-11898 中的全集
ISO 11898-1:2003 specifies the data link layer (DLL) and physical signalling of the controller area network (CAN). This document describes the general architecture of CAN in terms of hierarchical layers according to the ISO reference model for open systems interconnection (OSI) established in ISO/IEC 7498-1 and provides the characteristics for setting up an interchange of digital information between modules implementing the CAN DLL with detailed specification of the logical link control (LLC) sublayer and medium access control (MAC) sublayer.
ISO 11898-2:2003 specifies the high-speed (transmission rates of up to 1 Mbit/s) medium access unit (MAU), and some medium dependent interface (MDI) features (according to ISO 8802-3), which comprise the physical layer of the controller area network.
ISO 11898-3:2006 specifies characteristics of setting up an interchange of digital information between electronic control units of road vehicles equipped with the CAN at transmission rates above 40 kBit/s up to 125 kBit/s.
ISO 11898-4:2004 specifies time-triggered communication in the CAN. It is applicable to setting up a time-triggered interchange of digital information between electronic control units (ECU) of road vehicles equipped with CAN, and specifies the frame synchronisation entity that coordinates the operation of both logical link and media access controls in accordance with ISO 11898-1, to provide the time-triggered communication schedule.
ISO 11898-5:2007 specifies the CAN physical layer for transmission rates up to 1 Mbit/s for use within road vehicles. It describes the medium access unit functions as well as some medium dependent interface features according to ISO 8802-2. This represents an extension of ISO 11898-2, dealing with new functionality for systems requiring low-power consumption features while there is no active bus communication.
2022-01-26 16:54:46
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变局与谋局：复旦国际战略报告2021-复旦智库-2022.1-98页.pdf
2022-01-25 18:01:55
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基于固定翼飞机微波传输中继系统在电视直播中的应用——以环青海湖国际公路自行车赛电视直播为例.pdf
2022-01-25 14:09:09
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