DS1302是由美国DALLAS公司推出的具有涓细电流充电能力的低功耗实时时钟芯片
标签： DS1302
上传时间： 2015-07-24
上传用户：xuchengyi
工业字符型液晶，能够同时显示16x02即32个字符。
标签： LCD1602
上传时间： 2015-07-24
上传用户：xuchengyi
串行E2PROM是基于I2C-BUS 的存储器件，遵循二线制协议，由于其具有接口方便，体积小，数据掉电不丢失等特点，在仪器仪表及工业自动化控制中得到大量的应用。
标签： 24C02
上传时间： 2015-07-24
上传用户：xuchengyi
带中文字库的128X64 是一种具有4 位/8 位并行、2 线或3 线串行多种接口方式，内部含有国标一级、二级简体 中文字库的点阵图形液晶显示模块;其显示分辨率为128×64, 内置8192 个16*16 点汉字，和128 个16*8 点ASCII 字符 集.利用该模块灵活的接口方式和简单、方便的操作指令，可构成全中文人机交互图形界面。可以显示8×4 行16×16 点 阵的汉字. 也可完成图形显示.低电压低功耗是其又一显著特点。
标签： LCD12864
上传时间： 2015-07-24
上传用户：xuchengyi
matlab有限元网格划分程序 DistMesh is a simple MATLAB code for generation of unstructured triangular and tetrahedral meshes. It was developed by Per-Olof Persson (now at UC Berkeley) and Gilbert Strang in the Department of Mathematics at MIT. A detailed description of the program is provided in our SIAM Review paper, see documentation below. One reason that the code is short and simple is that the geometries are specified by Signed Distance Functions. These give the shortest distance from any point in space to the boundary of the domain. The sign is negative inside the region and positive outside. A simple example is the unit circle in 2-D, which has the distance function d=r-1, where r is the distance from the origin. For more complicated geometries the distance function can be computed by interpolation between values on a grid, a common representation for level set methods. For the actual mesh generation, DistMesh uses the Delaunay triangulation routine in MATLAB and tries to optimize the node locations by a force-based smoothing procedure. The topology is regularly updated by Delaunay. The boundary points are only allowed to move tangentially to the boundary by projections using the distance function. This iterative procedure typically results in very well-shaped meshes. Our aim with this code is simplicity, so that everyone can understand the code and modify it according to their needs. The code is not entirely robust (that is, it might not terminate and return a well-shaped mesh), and it is relatively slow. However, our current research shows that these issues can be resolved in an optimized C++ code, and we believe our simple MATLAB code is important for demonstration of the underlying principles. To use the code, simply download it from below and run it from MATLAB. For a quick demonstration, type "meshdemo2d" or "meshdemond". For more details see the documentation.
标签： matlab有限元网格划分程序
上传时间： 2015-08-12
上传用户：凛风拂衣袖
《GRE/GMAT/LSAT长难句300例精讲精练》是GRE超人气名师陈琦老师团队的又一本新作，也是“再要你命3000”的新成员，从之前的词汇、短语、练习，提升到长难句层面，相信学完本书后，考生在备考阶段肯定会更上一层楼。另外，本书的“六字真经”——倒装、省略、长句，一定会颠覆你的语法学习观，让你从今往后享受阅读带来的乐趣。 《GRE/GMAT/LSAT长难句300例精讲精练》不仅仅局限于书上文字内容的讲解，为了方便读者的理解，陈琦老师还精心挑选了50例录制了讲解视频，时不时“出现”给你“打点鸡血”，特别是在介绍本书学习方法的部分也录制了视频讲解，你还会担心看不懂吗？你还会觉得看书很枯燥吗？琦叔相伴，备考路上不再孤单。
上传时间： 2015-08-22
上传用户：东大寺的
GRE 数学圣经，下面是详细的英文介绍： Comprehensive Prep for GRE Math Every year, students pay $1,000 and more to test prep companies to prepare for the math section of the GRE. Now you can get the same preparation in a book. Although the GRE math section is difficult, it is very learnable. GRE Math Bible presents a thorough analysis of GRE math and introduces numerous analytic techniques that will help you immensely, not only on the GRE but in graduate school as well.
标签： GRE Math 数学
上传时间： 2015-08-22
上传用户：东大寺的
《分析性写作》，介绍言简意赅： The popular, brief rhetoric that treats writing as thinking, WRITING ANALYTICALLY, Sixth Edition, offers a series of prompts that lead you through the process of analysis and synthesis and help you to generate original and well-developed ideas. The book's overall point is that learning to write well means learning to use writing as a way of thinking well. To that end, the strategies of this book describe thinking skills that employ writing. As you will see, this book treats writing as a tool of thought--a means of undertaking sustained acts of inquiry and reflection.
上传时间： 2015-08-22
上传用户：东大寺的
VerilogHDL 入门必看书籍，通俗易懂的语言使初学者对建模有一个更直观的印象。
标签： VerilogHDL 入门 建模
上传时间： 2015-08-31
上传用户：wangdaoxing
设计一个洗衣机控制器，使洗衣机作如下运转：定时启动—〉正转20秒—〉暂停10秒—〉反转20秒—〉暂停10秒—〉定时不到，重复上面过程。 （2）若定时到，则停止，并发出音响信号。 （3）用两个数码管显示洗涤的预置时间（分钟数），按倒计时方式对洗涤过程作计时显示，直到时间到停机；洗涤过程由开始信号开始。 （4）三只LED灯表示正转、反转、暂停三个状态。
上传时间： 2015-08-31
上传用户：wangdaoxing
