Today, electric power transmission systems should face many demanding chal- lenges, which include balancing between Reliability, economics, environmental, and other social objectives to optimize the grid assets and satisfy the growing electrical demand. Moreover, the operational environment of transmission systems is becoming increasingly rigorous due to continually evolving functions of interconnected power networks from operation jurisdiction to control responsibly – coupled with the rising demand and expectation for Reliability.
標簽： Monitoring Protection Wide Area
上傳時間： 2020-06-07
上傳用戶：shancjb
Sensors are points ofcontact betweenthe material world ofatoms, mass, andenergy and the seemingly immaterial world of information, computation, and cognition. Linking these two domains more tightly yields all sorts of practical benefits, such as improvedinputdevicesforcomputers,moreeffectivemedicaldevices(implantedor worn), more precise agricultural operations, better monitored buildings or bridges, more secure payment systems, and more reliable sensor–actuator control systems. There are many settings in which tighter coupling between digital and physical planes can enhance safety, security, performance, and Reliability.
標簽： Computational RFID
上傳時間： 2020-06-08
上傳用戶：shancjb
Radio frequency identification (RFID) is a type of automatic identification systems which has gained popularity in recent years for being fast and reliable in keeping track of the individual objects. In RFID systems, contactless object identification is achieved using radio signals without the need for physical contact as the case with other existing identification technologies such as barcodes. Therefore, a huge number of items can be identified in a short amount of time with high Reliability and low cost which makes the RFID technology very attractive for a wide range of applications such as supply chain management, e-health, monitoring humans, pets, animals, and many other objects, toll control, and electrical tagging. Furthermore, RFID technology eliminates the human error and reduces the total cost of the products.
上傳時間： 2020-06-08
上傳用戶：shancjb
Extensively rewritten to present the C++11 language, standard library, and key design techniques as an integrated whole, Stroustrup thoroughly addresses changes that make C++11 feel like a whole new language, offering definitive guidance for leveraging its improvements in performance, Reliability, and clarity. C++ programmers around the world recognize Bjarne Stoustrup as the go-to expert for the absolutely authoritative and exceptionally useful information they need to write outstanding C++ programs. Now, as C++11 compilers arrive and development organizations migrate to the new standard, they know exactly where to turn once more: Stoustrup's C++ Programming Language, Fourth Edition.Bjarne Stroustrup是C++的設計師和最早的實現者，也是《C++程序設計語言》、《帶標注的C++參考手冊》和《C++語言的設計與演化》的作者。他從丹麥Aarhus大學和英國牛津大學畢業，現在是AT&T大規模程序設計研究部的負責人，AT&T特別成員，AT&T貝爾實驗室特別成員，以及ACM特別成員。Stroustrup的研究興趣包括分布式系統、操作系統、模擬、設計和程序設計。他也是Addison·Wesley的C++In-Depth系列書籍的編輯。
標簽： C++
上傳時間： 2022-02-01
上傳用戶：
The PW8205A8TS is the highest performance trench N-ch MOSFETs with extreme high cell density,which provide excellent RDSON and gate charge for most of the small power switching and loadswitch applications. The meet the RoHS and Product requirement with full function Reliabilityapproved .
標簽： 8205a8
上傳時間： 2022-02-14
上傳用戶：wangshoupeng199
超聲波測距在智能機器人中的開發與應用摘 要：本文提出了在機器人控制中，使用軟件方法實現超聲波測距機器人避障功能的工作原理和設計 方法。該系統在使用過程中，測量精度高，機器人避障準確，可靠，真正實現了智能化控制。 關鍵詞：機器人 超聲波 測距 軟件觸發 Abstract： The 0n pnnc eanddesignm d10d ofu]U~ sordc are descx'~edindetail fora intenigencero~ ic ． ByI|8i“gthissystem，therobotmakesaccta~elyavoidingdmwhackhi# Reliability． 1畸 wo阿s：ro tultro-sor~c聊 曲 喀sot~aretrigger 1 引言 在智能機器人的研制開發中，很重要 的一部 分就是機器人 要能實現避 障功能 ，即通過傳感器 的作用 ，探測機器人行進道路 上是否碰到障礙。 若碰到了障礙 ，機器人應該 自動轉向 ，躲避障礙 。 本文所介 紹的超聲 波測距方法 ，應用 于 ET一18 Hem智能機器人中。通過超聲波測距 ，該智能機 器人實現了對步進電動機的智能控制及運動控制 方式的靈活應用。同時，超聲波測距作為一種非 接觸 的檢測方式 ，和紅外 、激光及無線電測距相 比，在近距范 圍內有不受光線影響、結構簡單 、成 本低等優點 2 超聲波測距基本原理 超聲波是指頻率在 2000Hz以上 ，不能引起正 常人聽覺反應 的機械振動波 ，是物體 的機械振 動 在彈性介質 中傳播所形成 的機械振動波。由于超 聲波具有非常短 的波長 ，可 以聚集成狹小 的發
上傳時間： 2022-02-16
上傳用戶：jiabin
以AT89S52單片機為控制核心,采用電容降壓技術,Buck電路拓撲,PWM驅動模塊和功率器件散熱設計,通過高速的數據采集、主功率輸入輸出模塊和控制模塊,設計一種新型智能車載充電器.在充電過程中,通過負脈沖瞬間放電實現對鉛酸蓄電池的再生修復,提高電池的有效容量,延長使用壽命.該充電器體積小、速度快、效率高、可靠性好.With AT89S52 single chip computer as the control core,a new type of intelligent car-carried charger was designed by using capacitance step-down technology,Buck circuit topology,PWM driving module and power device heat dissipation design,through high-speed data acquisition,main power input and output module and control module.In the charging process,the regeneration and repair of lead-acid batteries are realized by instantaneous discharge of negative pulse,which improves the effective capacity of batteries and prolongs their service life.The charger has the advantages of small size,fast speed,high efficiency and good Reliability.
標簽： 車載充電器
上傳時間： 2022-03-27
上傳用戶：
CAN總線是汽車上應用最廣泛的車載網絡總線,具有實時性強、可靠性高、成本低等優點。鑒于此,介紹了一種利用飛思卡爾系列單片機MC9S12XS128作為控制器,利用其內部的MSCAN模塊、CAN收發器TJA1040等外圍元件進行CAN總線通信節點設計。該設計能夠實現CAN總線數據的發送與接收,可應用于汽車及其他各種CAN總線通信系統。CAN bus is the most widely used on-board network bus in automobiles. It has the advantages of realtime, high Reliability and low cost. In view of this,this paper introduces the design of CAN bus communication node by using Freescale MC9S12XS128 as controller,using its internal MSCAN module,CAN transceiver TJA1040 and other peripheral components. This design can realize the sending and receiving of CAN bus data,and can be used in automobile and other CAN bus communication systems.
上傳時間： 2022-03-27
上傳用戶：
本文首次設計并驗證了基于macom三合一芯片設計的光模塊電路,該電路旨在提供一種滿足SFF-8472中規定的數字診斷功能的低成本SFP+模塊。電路采用激光器驅動、限幅放大器、控制器以及時鐘恢復單元集成的單芯片,在保證高精度數字診斷功能基礎上,實現了低成本高可靠的特點。該電路在光接收接口組件與激光器驅動和限幅放大器單元的限幅放大器部分之間接入濾波器來提高模塊的靈敏度及信號質量。在控制器單元的數字電位器的引腳上采用外加電阻的方式避免出現上電不發光的故障問題。該研究結果為下一代SFP-DD光模塊設計與開發工作,奠定了一定的理論與實踐基礎。This paper designs and validates the optical module circuit based on the MACOM Trinity chip for the first time.This circuit aims to provide a low-cost SFP module which meets the digital diagnosis function specified in SFF-8472.The circuit uses a single chip integrated with laser driver,limiting amplifier,controller and clock recovery unit.On the basis of ensuring high precision digital diagnosis function,it achieves the characteristics of low cost and high Reliability.The circuit connects a filter between the optical receiving interface module and the limiting amplifier part of the laser driver and limiting amplifier unit to improve the sensitivity and signal quality of the module.The pin of the digital potentiometer in the controller unit is equipped with an external resistance to avoid the problem of power failure.The research results lay a theoretical and practical foundation for optical module design in high-speed data center.
上傳時間： 2022-04-03
上傳用戶：
針對交流電路過零檢測電路存在結構復雜、過零點檢測不準確、編程繁瑣等問題，設計了一種基于LM339的硬件結構簡單的過零檢測電路。通過仿真軟件Mulisim對該設計電路進行了仿真，實驗證明了該方案過零檢測的可行性、穩定性和可靠性，可直接作為交流電路中CPU的過零信號。Aiming at the problems of AC cilsuit zero crossing detection circuit such as complex structure, zero crossing detection and cumbersome programming, a zero crossing detection circuit with simple hardware structure based on LM339 was designed. The design circuit was simulated by simulation software Mulisim, and the feasibility, stability and Reliability of zero crossing detection were proved by experiments, which can be used as zero crossing signal of CPU in AC circuit directly.
上傳時間： 2022-05-03
上傳用戶：
