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Welcome to the third volume of the book entitled Technologies for the Wireless Future, which
is produced by WWRF. The idea is to take the most important outputs from the working
groups and special-interest groups that compose the Forum and bring them together in a series
of one-volume surveys. The latest of these will give the reader a good overview of the WWRF
approach to analyzing the future of wireless and mobile communications, as well as an insight
into the trends themselves and the key technologies that will be deployed.
標簽：
Wireless
Research
Forum
World
上傳時間：
2020-06-01
上傳用戶：shancjb
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This book on electrostatic discharge phenomena is essentially a translation and
update ofa Swedish edition from 1992.
The book is intended for people working with electronic circuits and
equipments, in application and development. All personnel should be aware of the
ESD-hazards, especially those responsible for quality. ESD-prevention is a part of
TQM (Total Quality Management). The book is also usable for courses on the
subject.
標簽：
Electronics
Scourge
ESD
The
of
上傳時間：
2020-06-05
上傳用戶：shancjb
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This book is written for engineers involved in the operation, control, and
planning of electric power systems. In addition, the book provides information and
tools for researchers working in the fields of power system security and stability. The
book consists of two volumes. The first volume provides traditional techniques for the
stability analysis of large scale power systems. In addition, an overview of the main
drivers and requirements for modernization of the traditional methods for online
applications are discussed. The second volume provides techniques for online security
assessment and corrective action studies. In addition, the impact of variable generation
on the security of power systems is considered in the second volume. The first volume
may be considered as a background builder while the second volume is intended for
the coverage of edge techniques and methods for online dynamic security studies.
標簽：
Security
Dynamic
上傳時間：
2020-06-07
上傳用戶：shancjb
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Data science is a term that the media has chosen to
minimize, obfuscate, and sometimes misuse. It involves a
lot more than just data and the science of working with
data. Today, the world uses data science in all sorts of
ways that you might not know about, which is why you
need Data Science Programming All-in-One For
Dummies
標簽：
Programming
All-In-One
Science
Data
上傳時間：
2020-06-10
上傳用戶：shancjb
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Design for manufacturability and statistical design encompass a number
of activities and areas of study spanning the integrated circuit design and
manufacturing worlds. In the early days of the planar integrated circuit, it was
typical for a handful of practitioners working on a particular design to have
a fairly complete understanding of the manufacturing process, the resulting
semiconductor active and passive devices, as well as the resulting circuit -
often composed of as few as tens of devices. With the success of semiconductor
scaling, predicted and - to a certain extent even driven - by Moore’s law, and
the vastly increased complexity of modern nano-meter scale processes and the
billion-device circuits they allow, there came a necessary separation between
the various disciplines.
標簽：
Manufacturability
Statistical
Design
for
and
上傳時間：
2020-06-10
上傳用戶：shancjb
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在半導體制冷技術的工作性能及其優缺點研究的基礎上,設計了以單片機為核心控制元件,以TEC1-12706為執行元件的半導體制冷溫度控制系統。采用高精度分段式PID控制算法配合PWM輸出控制的方法實現溫度控制;選擇數字傳感器DS18B20為溫度檢測元件,還包含1602液晶顯示模塊、按鍵調整輸入模塊和H橋驅動模塊等。實際測試表明,該系統結構簡單易行,操作方便,工作性能優良,同時針對該系統專門設計的溫控算法,使半導體制冷器能更好地適應不同工況而充分發揮其制冷制熱工作特性。Based on the study of the performance and advantages and disadvantages of thermoelectric cooler(TEC)technology,a thermoelectric cooling temperature control system with single-chip microcomputer as the core control element and TEC1-12706 as the executive element was designed. High precision piecewise PID control algorithm combined with PWM output control method is adopted to realize temperature control. The digital sensor DS18B20 is selected as the temperature detection element. It also includes 1602 LCD module,key adjustment input module and H bridge drive module. The actual test shows that the system has simple structure,convenient operation and excellent performance. Meanwhile,the temperature control algorithm specially designed for the system can make the semiconductor cooler better adapt to different working conditions and give full play to its refrigeration and heating characteristics.
標簽：
半導體
溫度控制系統
上傳時間：
2022-03-27
上傳用戶：
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隨著科技發展及工業4.0 進程推進,機械臂應用范圍越來越廣,并演化出各種各樣的機械臂,如碼垛機械臂、焊接機械臂、裝配機械臂以及手術機械臂等。現利用solidworks 進行三維建模,設計制作一款基于stm32f103c8t6 單片機的主從式桌面級機械臂,該機械臂包括一個主動機械臂和一個從動機械臂,采用藍牙傳輸信號方式進行同步運動,并且詳細介紹了該機械臂材料選擇、結構設計、工作原理、組成部分和設計特點。With the development of science and technology and the advancement of Industry 4.0, the application range of the mechanical arm has become wider and wider, and various types of mechanical arms, such as palletizing robot arms, welding robot arms, assembly robot arms, and surgical robot arms, have been developed. Now using solidworks for 3D modeling, design and manufacture a master-slave desktop-level robot arm based on stm32f103c8t6 single-chip microcomputer. The robot arm includes an active robot arm and a slave robot arm, which uses Bluetooth to transmit signals for synchronous motion. The material selection, structural design, working principle, components and design features of the manipulator are introduced.
標簽：
stm32f103c8t6
單片機
上傳時間：
2022-03-27
上傳用戶：
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電學中的測量技術涉及范圍非常廣,電流測量在電學計量中占有非常重要的位置。如何精確地進行電流測量是精密測量的一大難題。傳統的電流檢測電路多采用運算放大芯片與片外電流檢測電路相結合的方式,電路集成度很低,需要較多的接口和資源才能完成對電路的檢測。本文把所有電路部分都集成在一塊芯片上,包括檢測電阻,運算放大器電路及模擬轉數字轉換電路,從而在電路內部可以進行電流檢測,使電路更好的集成化。前置電路使用二級共源共柵結構的運算放大器,減小溝道長度調制效應造成的電流誤差。10位SAR ADC中采用電容驅動能力強的傳輸門保證了模數轉化器的有效精度。比較器模塊采用再生鎖存器與遲滯比較器作為基礎單元組合解決精密測量的問題。本設計可以作為嵌入芯片內的一小部分而檢測芯片中的微小電流1mA~100mA,工作電壓在1.8v左右,電流檢測精度預期達到10uA的需求。The measurement technology in electricity involves a wide range,and current measurement plays a very important position in electrical measurement.How to accurately measure current is a big problem in precision measurement. The traditional current detecting circuit adopts the combination of the operational amplifier chip and theoff-chip current detecting circuit, The circuit integration is very low, and more interfaces and resources are needed tocomplete the circuit detection.This topic integrates all the circuit parts into one chip, including detection resistance, operational amplifier circuit andanalog to digital conversion circuit. Highly integrated circuit makes the external resources on the chip more intensive,so that current detection can be carried out inside the circuit, so that the circuit can be better integrated. Thefront-end circuit of this project uses two-stage cascade operational amplifier and cascade tube to reduce the currenterror caused by channel length modulation effect. In 10-bit SAR ADC, the transmission gate with strong capacitivedriving ability ensures the effective accuracy of the analog-to-digital converter. Comparator module uses regenerativelatch and hysteresis comparator as basic unit to solve the difficult problem of precision measurement. This topic can beused as a small part of the embedded chip to detect the micro-current in the chip 1 mA~100 mA, the working voltageis about 1.8v, and the current detection accuracy is expected to reach the requirement of 10 uA.
標簽：
電流檢測
電路
運算放大器
adc
上傳時間：
2022-04-03
上傳用戶：
-
基于PSIM仿真軟件，分析了Boost電路拓撲結構，設定了參數要求進行電路仿真設計，通過電路仿真軟件PSIM對Boost電路工作在CCM模式下，合理設置占空比參數。實驗結果表明理論分析與仿真的一致性和參數設計的正確性，輸出電壓和電流參數穩定，Boost電路輸出效率高。This design is based on PSIM simulation software,analyzes the topology of Boost circuit,sets the parameter re- quirements for circuit simulation design,and reasonably sets the duty cycle parameters for Boost circuit working in CCM mode through PSIM simulation software.The experimental results show that the theoretical analysis and simulation are consis- tent and the parameter design is correct,the output voltage and current parameters are stable.
標簽：
psim
開關電源
boost
上傳時間：
2022-05-04
上傳用戶：
-
DVI（Digital Visual Interface），是1999年由Silicon Im-age、lntel（英特爾）、Compaq（康柏）、IBM、HP（惠普）、NEC、Fujitsu（富士通）等公司共同組成的數字顯示工作組DDWG（Digital Display working Group）推出的接口標準，其外觀是一個24針的接插件（中-1。DVI接口采用高速串行的方式傳輸數據，在正常的使用情況下，DVI傳輸從計算機引出后直接連接到顯示終蠟，中間只經過兩對匹配的連接器和長度比較短的DVI線纜，DVI信號在這種情況下的傳輸一般都不會存在什么問題。當前在工業控制等惡劣環境領域DVI接口的使用頻率也越來越頻繁，在工業控制環境下，DVI傳輸需要經過除標準傳輸線纜外的其它環境，如底板、轉接線等，傳輸線的長度也可能比較長，而且當前在工業控制領域基于DVI接口的電路基本上仍然采用原有的VGA接口電路的方式進行設計，在信號引出時仍采用傳統連接器，而不是專用的差分連接器。以上這些情況都導致在工業控制環境下DVI信號傳輸經常出現信號完整性問題]。本文針對常見的DVI信號完整性問題，提出了基于電路仿真的解決方法，并結合具體的硬件平臺詳細說明了該方法的實現過程。使用基于電路仿真的方法可以得到DVI傳輸的極限情況，合理為設計留有裕度。最后通過高速示波器對電路的測試驗證了仿真方法
標簽：
通信
差分電路設計
上傳時間：
2022-06-18
上傳用戶：
