为提高煤矿机车的安全持续性,提高其运行稳定性,在分析无刷直流电机控制系统的基础上,采用一种基于PI控制的双闭环新型无刷直流电机控制系统。采用的双闭环系统中,速度环和电流环都采用PI控制算法,并用MATLAB\Simulink进行仿真验证。结果表明,此系统鲁棒性好、响应速度快,证明了设计的合理性。

Delve into the Broadcom VideoCore GPU used on the Raspberry Pi and master topics such as OpenGL ES and OpenMAX. Along the way, you’ll also learn some Dispmanx, OpenVG, and GPGPU programming. The author, Jan Newmarch bumped into a need to do this kind of programming while trying to turn the RPi into a karaoke machine: with the CPU busting its gut rendering MIDI files, there was nothing left for showing images such as karaoke lyrics except for the GPU, and nothing really to tell him how to do it. Raspberry Pi GPU Audio Video Programming scratches his itch and since he had to learn a lot about RPi GPU programming, he might as well share it with you. What started as a side issue turned into a full-blown project of its own; and this stuff is hard. What You'll Learn Use Dispmanx and EGL on Raspberry Pi Work with OpenMAX and its components, state, IL Client Library, * * Buffers, and more on RPi Process images and video on RPi Handle audio on RPi Render OpenMAX to OpenGL on the RPi Play multimedia files on the RPi Use OpenVG for text processing and more Master overlays Who This Book Is For You should be comfortable with C programming and at least some concurrency and thread programming using it. This book is for experienced programmers who are new or learning about Raspberry Pi. Table of Contents Chapter 1: Introduction to the Raspberry Pi Chapter 2: Khronos Group Chapter 3: Compiling Programs for the Raspberry Pi Chapter 4: Dispmanx on the Raspberry Pi Chapter 5: EGL on the Raspberry Pi Chapter 6: OpenGL ES on the Raspberry Pi Chapter 7: OpenMAX on the Raspberry Pi Concepts Chapter 8: OpenMAX Components on the Raspberry Pi Chapter 9: OpenMAX on the Raspberry Pi State Chapter 10: OpenMAX IL Client Library on the Raspberry Pi Chapter 11: OpenMAX Buffers on the Raspberry Pi Chapter 12: Image Processing on the Raspberry Pi Chapter 13: OpenMAX Video Processing on the Raspberry Pi Chapter 14: OpenMAX Audio on the Raspberry Pi Chapter 15: Rendering OpenMAX to OpenGL on the Raspberry Pi Chapter 16: Playing Multimedia Files on the Raspberry Pi Chapter 17: Basic OpenVG on the Raspberry Pi Chapter 18: Text Processing in OpenVG on the Raspberry Pi Chapter 19: Overlays on the Raspberry Pi

叮当，在 Raspberry Pi 上的中文语音对话机器人/智能音箱项目

用plecs搭建三相逆变器模型，进行电压前馈的PI控制

我们研究了$$ \ Lambda _b \ rightarrow \ Lambda _c ^ * \ ell \ bar {\ nu} _ \ ell $$Λb→Λc∗ℓν¯ℓ和$$ \ Lambda _b \ rightarrow \ Lambda _c ^ *的含义 \ pi ^-$$Λb→Λc∗π-$$ [\ Lambda _c ^ * = \ Lambda _c（2595）$$ [Λc∗ =Λc（2595）和$$ \ Lambda _c（2625）] $$Λc （2625）]可以从重夸克自旋对称性（HQSS）推论得出的衰变。 确定作为HQSS伙伴的奇数奇偶校验$$ \ Lambda _c（2595）$$Λc（2595）和$$ \ Lambda _c（2625）$$Λc（2625）共振作为HQSS伙伴，总角动量–奇偶校验$$ j_q ^ P = 1 ^-$$ jqP = 1-对于轻自由度，我们发现比率$$ \ Gamma（\ Lambda _b \ rightarrow \ Lambda _c（2595）\ pi ^-）/ \ Gamma（\ Lambda _b \ rig

构造振幅模型来描述$$ {D ^ {0} \ rightarrow K ^ {-} \ pi ^ {+} \ pi ^ {+} \ pi ^ {-}} $$ D0→K- π+π+π-和$$ {D ^ {0} \ rightarrow K ^ {+} \ pi ^ {-} \ pi ^ {-} \ pi ^ {+}} $$ D0→K +π-π -π+使用LHCb实验使用在7和8 TeV质心能量处收集的pp碰撞数据进行衰减，对应于3.0 $$ fb ^ {-1} $$ fb-1的综合光度。 发现对两个衰减幅度的最大贡献来自轴向共振，衰减模式为$$ D ^ {0} \ rightarrow a_1（1260）^ {+} K ^ {-} $$ D0→a1（1260）+ K -和$$ D ^ {0} \ rightarrow K_1（1270/1400）^ {+} \ pi ^ {-} $$ D0→K1（1270/1400）+π-在$$ {D ^ {0 } \ rightarrow K ^ {-} \ pi ^ {+} \ pi ^ {+} \ pi ^ {-}} $$ D0→K-π+π

我们研究了常规扰动QCD（PQCD）形式论中排他的非轻子衰变$$ B \ rightarrow \ chi _ {c1} K（\ pi）$ B→χc1K（π）。 详细给出了支化比和CP不对称的预测。 我们将我们的结果与可用的实验数据以及文献中存在的其他理论研究的预测进行比较。 看来$$ B \ rightarrow \ chi_ {c1} K $$ B→χc1K的分支比与早期分析相比更符合数据。 对于由Cabibbo抑制的$$ B_s $$ Bs衰减，分支比可以达到$$ 10 ^ {-5} $$ 10-5的量级，这对于实验观察将是直接的。 数值结果表明，相关衰减的直接CP不对称性很小。 $$ B ^ 0 \ rightarrow \ chi _ {c1} K_S $$ B0→χc1KS中混合引起的CP不对称非常接近$$ \ sin {2 \ beta} $$sin2β，这表明该通道提供了 测量Cabbibo-Kobayashi-Maskawa（CKM）角$$ \β$$β的另一种方法。 本工作中获得的结果可以通过LHCb和即将上市的Belle II的进一步实验进行测试。

我们研究了强子衰变$ B ^ \ pm \ rightarrow \ rho ^ 0（\ omega）\ pi ^ \ pm \ rightarrow \ pi ^ + \ pi ^-\ pi ^ \ pm $中的局部直接CP违反，包括 由一个有趣的机制引起的效应，该机制涉及电荷对称性违反了$ \ rho ^ 0 $和$ \ omega $之间的混合。 当$ \ pi ^ + \ pi ^-$的低不变质量[$ m（\ pi ^ + \ pi ^-）_ {\ mathrm {low}} $]接近$时，我们计算局部积分直接CP违规 \ rho ^ 0（770）$。 对于调查的五个形状因子模型，我们发现，当$ 0.750 <m（\ pi ^ + \ pi ^-）时，模型中参数范围内的局部集成直接CP违规从$ -0.0752 $ $ -0.0290 $变化 _ {\ mathrm {low}} <0.800 $ GeV。 这个结果，特别是符号，与实验数据一致，并且与形状因子模型无关。 新的实验数据表明，区域$ 0.470 <m（\ pi ^ + \ pi ^-）_ {\ mathrm {low

Packt.Raspberry.Pi.for.Python.Programmers.Cookbook. 2nd 英文版 树莓派

#非常基本的 HTML5/JS 节拍器原型 ###使用 P5.js