What you always wanted to know about netWorking but were afraid to ask! * How the Internet Works * How e-mail, e-learning, and telephony Work on the Internet * What makes a netWork safe * How traffic gets from here to there * Disaster recovery and other ways to keep a netWork running * How businesses share data * See the world of Cisco netWorking with this illustrated guide s visual approach to learning * Useful for both novices and netWorking professionals * Covers a broad variety of internetWorking topics-from e-mail to VPNs At last-an illustrated guide to the world of Cisco netWorking. Cisco NetWorking Simplified breaks down the complicated world of internetWorking into easy-to-understand parts. Learn quickly and easily the fundamentals of a variety of topics, such as security, IP telephony, and quality of service, from the full-color diagrams and clear explanations found in Cisco NetWorking Simplified.
标签： netWorking Internet always afraid
上传时间： 2013-12-14
上传用户：520
简洁明了，适合初学者，谭浩强c语言Work版
上传时间： 2015-12-30
上传用户：kingsr
The Cathode-Ray Tube at Work by John F. Rider (z-lib.org).pdf
标签： 阴极射线管
上传时间： 2022-01-16
上传用户：
关于FPGA流水线设计的论文\r\nThis Work investigates the use of very deep pipelines for\r\nimplementing circuits in FPGAs, where each pipeline\r\nstage is limited to a single FPGA logic element (LE). The\r\narchitecture and VHDL design of a parameterized integer\r\na
上传时间： 2013-09-03
上传用户：wl9454
Abstract: What can be simpler than designing with CMOS and BiCMOS? These technologies are very easy to use butthey still require careful design. This tutorial discusses the odd case of circuits that seem to Work but exhibit somepeculiar behaviors—including burning the designer's fingers!
上传时间： 2013-11-03
上传用户：dick_sh
Abstract: Perfection is relative and application specific. The perfect race car is not the car we use to commute to Work. We need products for everyday use that are high quality, affordable, and solidly reliable. There will be times when we must use components that are not perfect, and this is when calibration becomes important. Calibration techniques reduce tolerances in imperfect manufacturing equipment while maintaining affordability.
标签： 校准
上传时间： 2013-10-09
上传用户：哈哈hah
Abstract: Alexander Graham Bell patented twisted pair wires in 1881. We still use them today because they Work so well. In addition we have the advantage ofincredible computer power within our world. Circuit simulators and filter design programs are available for little or no cost. We combine the twisted pair and lowpassfilters to produce spectacular rejection of radio frequency interference (RFI) and electromagnetic interference (EMI). We also illustrate use of a precision resistorarray to produce a customizable differential amplifier. The precision resistors set the gain and common mode rejection ratios, while we choose the frequencyresponse.
上传时间： 2014-11-26
上传用户：Vici
Integrated EMI/Thermal Design forSwitching Power SuppliesWei ZhangThesis submitted to the Faculty of theVirginia Polytechnic Institute and State Universityin partial fulfillment of the requirements for the degree of Integrated EMI/Thermal Design forSwitching Power SuppliesWei Zhang(ABSTRACT)This Work presents the modeling and analysis of EMI and thermal performancefor switch power supply by using the CAD tools. The methodology and design guidelinesare developed.By using a boost PFC circuit as an example, an equivalent circuit model is builtfor EMI noise prediction and analysis. The parasitic elements of circuit layout andcomponents are extracted analytically or by using CAD tools. Based on the model, circuitlayout and magnetic component design are modified to minimize circuit EMI. EMI filtercan be designed at an early stage without prototype implementation.In the second part, thermal analyses are conducted for the circuit by using thesoftware Flotherm, which includes the mechanism of conduction, convection andradiation. Thermal models are built for the components. Thermal performance of thecircuit and the temperature profile of components are predicted. Improved thermalmanagement and winding arrangement are investigated to reduce temperature.In the third part, several circuit layouts and inductor design examples are checkedfrom both the EMI and thermal point of view. Insightful information is obtained.
上传时间： 2013-11-10
上传用户：1595690
Once relegated to the hinterlands of low cost indicatorlights, the LED is again in the spotlight of the lightingworld. LED lighting is now ubiquitous, from car headlightsto USB-powered lava lamps. Car headlights exemplifyapplications that capitalize on the LED’s clear advantages—unwavering high quality light output, tough-assteelrobustness, inherent high effi ciency—while a USBlava lamp exemplifi es applications where only LEDs Work.Despite these clear advantages, their requirement forregulated voltage and current make LED driver circuitsmore complex than the venerable light bulb, but some newdevices are closing the gap. For instance, the LTM®8040μModule™ LED driver integrates all the driver circuitryinto a single package, allowing designers to refocus theirtime and effort on the details of lighting design criticalto a product’s success.
上传时间： 2013-10-16
上传用户：togetsomething
为了改变目前电网现场作业管理的变电巡检、变电检修试验、输电线路巡检检修等管理系统各自独立运行，信息不能共享，功能、效率受限，建设和维护成本高的现状，提出了采用B/S+C/S构架模式，将各现场作业管理模块和生产MIS（管理系统）集成为一体的现场作业管理系统的设计方案，做到各子系统和生产MIS软硬资源共享，做到同一数据唯一入口、一处录入多处使用。各子系统设备人员等基础信息来源于生产管理系统，各子系统又是生产管理系统的作业数据、缺陷信息的重要来源。经过研究试用成功和推广应用，目前该系统已在江西电网220 kV及以上变电站全面应用。 Abstract: In order to improve the status that the substation field inspection system， substation equipments maintenance and testing system， power-line inspection and maintenance system are running independent with each other. They can?蒺t share the resource information which accordingly constrains their functions and efficiency， and their construction and maintenance costs are high. This paper introduces a field standardized Work management system based on B/S+C/S mode， integrating all field Work management systems based on MIS and share the equipments and employee?蒺s data of MIS，the field Work data of the sub systems are the source information of MIS， by which the same single data resouce with one-time input can be utilized in multiple places. After the research and testing， this system is triumphantly using in all 220kV and above substations in Jiangxi grid.
上传时间： 2013-11-15
上传用户：han_zh
