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数据库系统 erwin是一个数据库关系实体模型（ER Model）设计工具

erwin是一个数据库关系实体模型（ER Model）设计工具，与Power Designer（Sybase公司开发）成为最常用的两种数据库设计工具。目前该工具被CA收购，成为CA数据库解决方案中的一个关键部分。与微软的Vision相比，erwin只能设计er model，而且设计界面选项较多，相对来说并不那么友好，增加了使用的难度 ...
https://www.eeworm.com/dl/523/417146.html
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系统设计方案 R1EX24xxx series are two-wire serial interface EEPROM (Electrically Erasable and Programmable ROM).

R1EX24xxx series are two-wire serial interface EEPROM (Electrically Erasable and Programmable ROM). They realize high speed, low power consumption and a high level of reliability by employing advanced MNOS memory technology and CMOS process and low voltage circuitry technology. They also have a 128- ...
https://www.eeworm.com/dl/678/425340.html
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软件工程 Fortran has always been the principal language used in the fields of scientific, numerical, and en

Fortran has always been the principal language used in the fields of scientific, numerical, and engineering programming, and a series of revisions to the standard defining successive versions of the language has progressively enhanced its power and kept it competitive with several generations of ...
https://www.eeworm.com/dl/540/426523.html
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书籍 Visible Light Communication

Visible light communications (VLC) is the name given to an optical wireless communication system that carries information by modulating light in the visible spectrum (400–700 nm) that is principally used for illumination [1–3]. The communications signal is encoded on top of the illumination light. ...
https://www.eeworm.com/dl/522187.html
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单片机编程 基于PIC单片机的低功耗读卡器硬件设计

基于PIC单片机的低功耗读卡器硬件设计:本文提出了一个完整的基于串口的智能读卡器子系统设计方案并将其实现。读卡器的设计突出了小型化的要求，全部器件使用贴片封装。为了减小读卡器的体积，设计中还使用了串口窃电的技术，使用串口信号线直接给读卡器供电。为此，读卡器使用了省电的设计，采用了省电的集成电路，并大胆简 ...
https://www.eeworm.com/dl/502/31279.html
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技术资料 DeviceNet总线在智能配电网络系统中的应用

摘要：本文将DeviceNet 现场总线技术应用于低压配电系统，充分利用DeviceNet的短报文帧传输、无破坏性的总线仲裁技术等优点，提高配电网络系统的实时性和可靠性，达到良好的效果。关键词：DeviceNet；智能化；配电网络系统The Application of Devicelet in Intelligent Power Distribution System Zhu Fei（Shanghai Electr ...
https://www.eeworm.com/dl/892962.html
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电源技术 DN436微型全桥压电马达驱动器

  Piezoelectric motors are used in digital cameras for autofocus,zooming and optical image stabilization. Theyare relatively small, lightweight and effi cient, but theyalso require a complicated driving scheme. Traditionally,this challenge has been met with the use ofseparatecircuits, inclu ...
https://www.eeworm.com/dl/505/24328.html
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工控技术 赛灵思电机控制开发套件简介（英文版）

　　The power of programmability gives industrial automation designers a highly efficient， cost-effective alternative to traditional motor control units （MCUs）。 The parallel-processing power， fast computational speeds， and connectivity versatility of Xilinx® FPGAs can accelerate the impl ...
https://www.eeworm.com/dl/569/40865.html
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技术资料 一种车载充电器的设计

以AT89S52单片机为控制核心,采用电容降压技术,Buck电路拓扑,PWM驱动模块和功率器件散热设计,通过高速的数据采集、主功率输入输出模块和控制模块,设计一种新型智能车载充电器.在充电过程中,通过负脉冲瞬间放电实现对铅酸蓄电池的再生修复,提高电池的有效容量,延长使用寿命.该充电器体积小、速度快、效率高、可靠性好.With AT ...
https://www.eeworm.com/dl/831626.html
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技术资料 基于无线通信和墨水屏的电子标识技术研究

针对零售行业更换纸质标签所需人工成本高、纸质资源多且错误率高的缺点,文章开展了基于无线通信和墨水屏的电子标识技术研究,实现了上位机与单片机之间的无线通信和低功耗刷新墨水屏并准确显示信息的功能,为商品信息实时化、资讯化和自动化更新提供了硬件基础。实验测试结果表明,该电子标识技术的无线通信稳定可靠,具有低成 ...
https://www.eeworm.com/dl/894714.html
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