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critical

  • 6LoWPAN+The+Wireless+Embedded+Internet

    The Internet of Things is considered to be the next big opportunity, and challenge, for the Internet engineering community, users of technology, companies and society as a whole. It involves connecting embedded devices such as sensors, home appliances, weather stations and even toys to Internet Protocol (IP) based networks. The number of IP-enabled embedded devices is increasing rapidly, and although hard to estimate, will surely outnumber the number of personal computers (PCs) and servers in the future. With the advances made over the past decade in microcontroller,low-power radio, battery and microelectronic technology, the trend in the industry is for smart embedded devices (called smart objects) to become IP-enabled, and an integral part of the latest services on the Internet. These services are no longer cyber, just including data created by humans, but are to become very connected to the physical world around us by including sensor data, the monitoring and control of machines, and other kinds of physical context. We call this latest frontier of the Internet, consisting of wireless low-power embedded devices, the Wireless Embedded Internet. Applications that this new frontier of the Internet enable are critical to the sustainability, efficiency and safety of society and include home and building automation, healthcare, energy efficiency, smart grids and environmental monitoring to name just a few.

    標(biāo)簽: Embedded Internet Wireless 6LoWPAN The

    上傳時間: 2020-05-26

    上傳用戶:shancjb

  • High+Voltage+Protection

    This book is intended to help electric power and telephone company personnel and individuals interested in properly protecting critical tele- communications circuits and equipment located in high voltage (HV) environments and to improve service reliability while maintaining safe working conditions. critical telecommunications circuits are often located in HV environments such as electric utility power plants, substations, cell sites on power towers, and standalone telecommuni- cations facilities such as 911 call centers and mountaintop telecom- munications sites. 

    標(biāo)簽: Protection Voltage High

    上傳時間: 2020-05-27

    上傳用戶:shancjb

  • Phase-Locked+Loops+for+Wireless+Communications

    This book is intended for the graduate or advanced undergraduate engineer. The primary motivation for developing the text was to present a complete tutorial of phase-locked loops with a consistent notation. I believe this is critical for the practicing engineer who uses the text as a self-study guide.

    標(biāo)簽: Communications Phase-Locked Wireless Loops for

    上傳時間: 2020-05-31

    上傳用戶:shancjb

  • Radio Resource Management

    In a cellular communication system, a service area or a geographical region is divided into a number of cells, and each cell is served by an infrastructure element called the base station through a radio interface. Management of radio interface related resources is a critical design component in cellular communications. 

    標(biāo)簽: Management Resource Radio

    上傳時間: 2020-06-01

    上傳用戶:shancjb

  • Satellite and Terrestrial Radio Positioning

    Reliable and accurate positioning and navigation is critical for a diverse set of emerging applications calling for advanced signal-processing techniques. This book provides an overview of some of the most recent research results in the field of signal processing for positioning and navigation, addressing many challenging open problems.

    標(biāo)簽: Positioning Terrestrial Satellite Radio and

    上傳時間: 2020-06-01

    上傳用戶:shancjb

  • Spectrum+Sharing+Between+Radars

    Radio frequency spectrum is a scarce and critical natural resource that is utilized for many services including surveillance, navigation, communication, and broadcast- ing. Recent years have seen tremendous growth in the use of spectrum especially by commercial cellular operators. Ubiquitous use of smartphones and tablets is one of the reasons behind an all-time high utilization of spectrum. As a result, cellular operators are experiencing a shortage of radio spectrum to meet bandwidth demands of users. On the other hand, spectrum measurements have shown that much spectrum not held by cellular operators is underutilized even in dense urban areas. This has motivated shared access to spectrum by secondary systems with no or minimal impact on incumbent systems. Spectrum sharing is a promising approach to solve the problem of spectrum congestion as it allows cellular operators access to more spectrum in order to satisfy the ever-growing bandwidth demands of commercial users.

    標(biāo)簽: Spectrum Sharing Between Radars

    上傳時間: 2020-06-01

    上傳用戶:shancjb

  • ESD - Failure Mechanisms and Models

    Failure analysis is invaluable in the learning process of electrostatic discharge (ESD) and electrical overstress (EOS) protection design and development [1–8]. In the failure analysis of EOS, ESD, and latchup events, there are a number of unique failure analysis processes andinformationthatcanprovidesignificantunderstandingandillumination[4].Today,thereis still no design methodology or computer-aided design (CAD) tool which will predict EOS, ESDprotectionlevels,andlatchupinasemiconductorchip;thisisoneofthesignificantreasons why failure analysis is critical to the ESD design discipline.

    標(biāo)簽: Mechanisms Failure Models ESD and

    上傳時間: 2020-06-05

    上傳用戶:shancjb

  • ESD Program Management

    Electrostatic discharge  (ESD)  events  can  have serious detrimental effects  on  the manufacture  and  performance of microelectronic devices, the systems that contain them,  and  the manufacturing facilities used  to produce them. Submicron device technologies, high system operating speeds,  and  factory automation are making  ESD  control programs a critical factor  in  the quality  and  reliability of ESD-sensitive products.

    標(biāo)簽: Management Program ESD

    上傳時間: 2020-06-05

    上傳用戶:shancjb

  • Fundamentals+of+EM+Design+of+Radar

    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

    上傳時間: 2020-06-06

    上傳用戶:shancjb

  • Electric+Distribution+Network+Planning

    Electric distribution networks are critical parts of power delivery systems. In recent years, many new technologies and distributed energy resources have been inte- grated into these networks. To provide electricity at the possible lowest cost and at required quality, long-term planning is essential for these networks. In distribution planning, optimal location and size of necessary upgrades are determined to satisfy the demand and the technical requirements of the loads and to tackle uncertainties associated with load and distributed energy resources.

    標(biāo)簽: Distribution Electric Planning Network

    上傳時間: 2020-06-07

    上傳用戶:shancjb

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