Rapid growth of wireless communication services in recent decades has created a huge demand of radio spectrum. Spectrum scarcity and utilization inefficiency limit the development of wireless networks. Cognitive radio is a promising tech- nology that allows secondary users to reuse the underutilized licensed spectrum of primary users. The major challenge for spectrum sharing is to achieve high spectrum efficiency while making non-intrusive access to the licensed bands. This requires in- formation of availability and quality of channel resources at secondary transmitters, however, is difficult to be obtained perfectly in practice.
標簽： Opportunistic Spectrum Sharing
上傳時間： 2020-05-31
上傳用戶：shancjb
This book is an outgrowth of the pioneering development work done by InterDigital Com- munication Corporation in 3rd Generation TDD WCDMA Technology. Many engineers and managers were involved in this development, which spanned a wide range of tech- nology areas, including system architecture, radio interface, radio modem design, radio resource management and hardware/software implementation. In addition, TDD WCDMA technology had many direct and indirect contributors across the globe in the context of the development of the 3GPP TDD WCDMA Standard.
上傳時間： 2020-06-01
上傳用戶：shancjb
In the present era, low observability is one of the critical requirements in aerospace sector, especially related to defense. The stealth technology essentially relates to shaping and usage of radar absorbing materials (RAM) or radar absorbing struc- tures (RAS). The performance of such radar cross section (RCS) reduction tech- niques is limited by the bandwidth constraints, payload requirements, and other structural issues. Moreover, with advancement of materials science, the structure geometry no longer remains key decisive factor toward stealth.
標簽： Fundamentals Design Radar of EM
上傳時間： 2020-06-06
上傳用戶：shancjb
District energy (DE) systems use central heating and/or cooling facilities to provide heating and/or cooling services for communities. The advantages of district energy over conventional heating and cooling include improved efficiency, reliability and safety, reduced environmental impact, and for many situations better economics. DE systems can be particularly beneficial when integrated with cogeneration plants for electricity and heat, i.e., with combined heat and power (CHP) plants. One of the main impediments to increased use of cogeneration-based district energy is a lack of understanding of the behavior of integrated forms of such systems. This book is aimed at providing information on district energy and cogeneration tech- nologies, as well as systems that combine them.
標簽： Cogeneration District Systems Energy and
上傳時間： 2020-06-07
上傳用戶：shancjb
Recent years have seen a rapid development of neural network control tech- niques and their successful applications. Numerous simulation studies and actual industrial implementations show that artificial neural network is a good candidate for function approximation and control system design in solving the control problems of complex nonlinear systems in the presence of different kinds of uncertainties. Many control approaches/methods, reporting inventions and control applications within the fields of adaptive control, neural control and fuzzy systems, have been published in various books, journals and conference proceedings.
標簽： Stable_adaptive_neural_network_co ntrol
上傳時間： 2020-06-10
上傳用戶：shancjb
Agilent 34401A Service Guide.pdfIEC Measurement Category II includes electrical devices connected to mains at an outlet on a branch circuit. Such devices include most small appliances, test equipment, and other devices that plug into a branch outlet or socket. The 34401A may be used to make measurements with the HI and LO inputs connected to mains in such devices, or to the branch outlet itself (up to 300 VAC). However, the 34401A may not be used with its HI and LO inputs connected to mains in permanently installed electrical devices such as the main circuit-breaker panel, sub-panel disconnect boxes, or permanently wired motors. Such devices and circuits are subject to overvoltages that may exceed the protection limits of the 34401A. Note: Voltages above 300 VAC may be measured only in circuits that are isolated from mains. However, transient overvoltages are also present on circuits that are isolated from mains. The Agilent 34401A are designed to safely withstand occasional transient overvoltages up to 2500 Vpk. Do not use this equipment to measure circuits where transient overvoltages could exceed this level. Additional Notices Waste Electrical and Electronic Equipment (WEEE) Directive 2002/96/EC This product complies with the WEEE Directive (2002/96/EC) marking requirement. The affixed product label (see below) indicates that you must not discard this electrical/electronic product in domestic household waste. Product Category: With reference to the equipment types in the WEEE directive Annex 1, this product is classified as a "Monitoring and Control instrumentation" product. Do not dispose in domestic household waste. To return unwanted products, contact your local Agilent office, or see www.agilent.com/environment/product for more information. Agilent 34138A Test Lead Set The Agilent 34401A is compatible with the Agilent 34138A Test Lead Set described below. Test Lead Ratings Test Leads - 1000V, 15A Fine Tip Probe Attachments - 300V, 3A Mini Grabber Attachment - 300V, 3A SMT Grabber Attachments - 300V, 3A Operation The Fine Tip, Mini Grabber, and SMT Grabber attachments plug onto the probe end of the Test Leads. Maintenance If any portion of the Test Lead Set is worn or damaged, do not use. Replace with a new Agilent 3413
標簽： agilent
上傳時間： 2022-02-20
上傳用戶：
硬件工程師筆試題大全及答案21頁 硬件工程師筆試題大全及答案1、請列舉您知道的電阻、電容、電感品牌（最好包括國內、國外品牌）。 電阻：RALEC旺詮、ROYALOHM、SUPEROHM、UniOhm、TA-I大毅、TDK、TOKEN、VISHAY、YAGEO、廣東風華 電容：AVX、KEMET、Kyocera、muRata、NEC、nichicon、Panasonic、SAMSUNG、SANYO、TAIYO YUDEN、TDK、VISHAY、YAGEO、廣東風華、 電感：AEM、EPCOS、ETC、Gausstek豐晶、muRata、sumida村田、Sunlord順絡、TAI-TECH臺慶、TDK、TOKEN、TOREX、VISHAY、WE、YAGEO國巨、柯愛亞、科達嘉、奇力新、千如電子、捷比信、紫泰荊、肇慶英達、廣東風華 2、請解釋電阻、電容、電感封裝的含義：0402、0603、0805。表示的是尺寸參數。 0402:40*20mil；0603:60*30mil；0805:80*50mil。 3、請問電阻、電容、電感的封裝大小分別與什么參數有關？電阻封裝大小與電阻值、額定功率有關；電容封裝大小與電容值、額定電壓有關；電感封裝大小與電感量、額定電流有
標簽： 硬件工程師
上傳時間： 2022-03-25
上傳用戶：ttalli
芯片cx21986 規格書，希望能有幫助
上傳時間： 2022-07-17
上傳用戶：
全文將用一個貫穿始終的例子來說明如何繪制版圖。這個例子繪制的是一個最簡單的非門的版圖。S2-1建立版圖文件使用library manager.首先，建立一個新的庫myLib，關于建立庫的步驟，在前文介紹cdsSpice時已經說得很清楚了，就不再贅述。與前面有些不同的地方是：由于我們要建立的是一個版圖文件，因此我們在technology file選項中必須選擇compile a new tech file，或是attach to an exsiting tech file。這里由于我們要新建一個tech file，因此選擇前者。這時會彈出load tech file的對話框，如圖2-1-1所示。在ASCII Technology File中填入csmclo0.tf即可。接著就可以建立名為inv的cel了。為了完備起見，讀者可以先建立inv的schematic view和symbol view（具體步驟前面已經介紹，其中pmos長6u，寬為0.6u。nmos長為3u，寬為0.6u。model仍然選擇hj3p和hj3n）。然后建立其layout view，其步驟為：在tool中選擇virtuoso-layout，然后點擊ok。
上傳時間： 2022-07-20
上傳用戶：
JM20329S是一種Hi-Speed USB to SATA Bridge 轉換芯片，JMicron的固態硬盤開卡只能使用基于JM20329的開孔器才能正常開卡
上傳時間： 2022-07-26
上傳用戶：
