In 2005, when the world crossed-over to Web 2.0, business professionals and managers in every industry – from traditional retail to high tech media and telecom – felt the first powerful tremors of the strategic shifts taking place, sweeping away traditional business models and altering competitive landscapes.
上傳時(shí)間： 2020-05-27
上傳用戶：shancjb
Optical communication technology has been extensively developed over the last 50 years, since the proposed idea by Kao and Hockham [1]. However, only during the last 15 years have the concepts of communication foundation, that is, the modulation and demodulation techniques, been applied. This is pos- sible due to processing signals using real and imaginary components in the baseband in the digital domain. The baseband signals can be recovered from the optical passband region using polarization and phase diversity tech- niques, as well as technology that was developed in the mid-1980s.
標(biāo)簽： Transmission Processing Digital Optical
上傳時(shí)間： 2020-05-27
上傳用戶：shancjb
LTE-Advanced becomes a truly global standard for 4G cellular communications. Relay, as one of the key technologies of LTE-Advanced, can significantly extend the coverage, and improve the system throughput. LTE-A standards and tech- nologies were described in several recent books where the limited pages for relay feature prevent the detailed explanations of the technology. In this book, we tried to provide an in-depth description of LTE-A relay development. More specifically, significant portions are spent on relay channel modeling and potential technologies during the study item phase of the development, although some of those tech- nologies, such as Type 2 cooperative relay, multi-hop relay, relay with backhaul of carrier aggregation, were not standardized in Release 10 LTE.
標(biāo)簽： LTE-Advanced Technology Relay
上傳時(shí)間： 2020-05-27
上傳用戶：shancjb
In the past few decades, a technological revolution has occurred that has changed the way we live in dramatic ways. This technological revolution is the result of the emergence and evolution of a wide variety of new wireless networking tech- nologies. Now people using these technologies are able to access the network and control many applications at will with their handheld devices anywhere, anytime. Although these technologies have made a long lasting impact in the revolution, it has also opened up various challenging issues which are yet to be resolved to make them more efficient and cost-effective.
標(biāo)簽： Next-Generation Technologies Wireless
上傳時(shí)間： 2020-05-31
上傳用戶：shancjb
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(biāo)簽： Opportunistic Spectrum Sharing
上傳時(shí)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(shí)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(biāo)簽： Fundamentals Design Radar of EM
上傳時(shí)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(biāo)簽： Cogeneration District Systems Energy and
上傳時(shí)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(biāo)簽： Stable_adaptive_neural_network_co ntrol
上傳時(shí)間： 2020-06-10
上傳用戶：shancjb
13.56MHz天線設(shè)計(jì).pdf13.56M設(shè)計(jì)規(guī)范.pdf8-M1卡的安全問題及華東師大的應(yīng)對(duì)策略.pdf8.6 諧振電路的品質(zhì)因數(shù).pptDES&RSA.pptDismantling MIFARE Classic.pdfht-ide3000.pdfMSP430 單片機(jī)與CPU 卡接口函數(shù)設(shè)計(jì).pdfRC500-FM1702XX比較.pdfRC500天線設(shè)計(jì)資料RFID天線研究與設(shè)計(jì).pdfRFID技術(shù)和防沖撞算法.pdfRFID電子標(biāo)簽防碰撞算法的研究.pdfRFID讀寫器天線的研究與設(shè)計(jì).pdfRFID防碰撞技術(shù)的研究.pdf一種新穎的RFID防沖突算法.pdf低功耗無磁水表中射頻卡讀寫器的設(shè)計(jì).pdf基于MF RC500的RFID讀寫器的天線及匹配電路設(shè)計(jì).doc基于TRF7960 讀寫器硬件部分設(shè)計(jì)中應(yīng)注意的地方.pdf射頻識(shí)別技術(shù)防碰撞算法的研究.pdf射頻識(shí)別系統(tǒng)中的防碰撞算法設(shè)計(jì).pdf無源電子標(biāo)簽讀卡器防沖突檢測(cè)及天線設(shè)計(jì).pdf時(shí)隙ALOHA法在RFID系統(tǒng)防碰撞問題中的應(yīng)用.pdf設(shè)計(jì)MF RC500 的匹配電路和天線的應(yīng)用指南.pdf超高頻RFID無線接口標(biāo)準(zhǔn)ISO_IEC18000_6C的研究.pdf近耦合射頻識(shí)別系統(tǒng)的工作原理及天線設(shè)計(jì).pdf遠(yuǎn)距離RFID天線設(shè)計(jì).doc阻抗匹配.doc高速和資源節(jié)約型數(shù)據(jù)加密算法設(shè)計(jì).pdf
標(biāo)簽： rfid nfc 天線 射頻識(shí)別
上傳時(shí)間： 2021-11-08
上傳用戶：
蟲蟲下載站版權(quán)所有 京ICP備2021023401號(hào)-1
