Introduction ? ? The ARM Cortex -A8 microprocessor is the first applications microprocessor in ARM!ˉs new Cortex family. With high performance and power efficiency, it targets a wide variety of mobile and consumer applications including mobile phones, set-top boxes, gaming consoles and automotive navigation/entertainment systems. The Cortex-A8 processor spans a range of performance points depending on the implementation, delivering over to 2000 Dhrystone MIPS (DMIPS) of performance for demanding consumer applications and consuming less than 300mW for low-power mobile devices. This translates into a large increase in processing capability while staying with the power levels of previous generations of mobile devices. Consumer applications will benefit from the reduced HEAT dissipation and resulting lower packaging and integration costs.
標簽： microprocessor Introduction applications Cortex
上傳時間： 2013-12-09
上傳用戶：xzt
Computational models are commonly used in engineering design and scientific discovery activities for simulating complex physical systems in disciplines such as fluid mechanics, structural dynamics, HEAT transfer, nonlinear structural mechanics, shock physics, and many others. These simulators can be an enormous aid to engineers who want to develop an understanding and/or predictive capability for complex behaviors typically observed in the corresponding physical systems. Simulators often serve as virtual prototypes, where a set of predefined system parameters, such as size or location dimensions and material properties, are adjusted to improve the performance of a system, as defined by one or more system performance objectives. Such optimization or tuning of the virtual prototype requires executing the simulator, evaluating performance objective(s), and adjusting the system parameters in an iterative, automated, and directed way. System performance objectives can be formulated, for example, to minimize weight, cost, or defects; to limit a critical temperature, stress, or vibration response; or to maximize performance, reliability, throughput, agility, or design robustness. In addition, one would often like to design computer experiments, run parameter studies, or perform uncertainty quantification (UQ). These approaches reveal how system performance changes as a design or uncertain input variable changes. Sampling methods are often used in uncertainty quantification to calculate a distribution on system performance measures, and to understand which uncertain inputs contribute most to the variance of the outputs. A primary goal for Dakota development is to provide engineers and other disciplinary scientists with a systematic and rapid means to obtain improved or optimal designs or understand sensitivity or uncertainty using simulationbased models. These capabilities generally lead to improved designs and system performance in earlier design stages, alleviating dependence on physical prototypes and testing, shortening design cycles, and reducing product development costs. In addition to providing this practical environment for answering system performance questions, the Dakota toolkit provides an extensible platform for the research and rapid prototyping of customized methods and meta-algorithms
標簽： Optimization and Uncertainty Quantification
上傳時間： 2016-04-08
上傳用戶：huhu123456
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
The solid high-polymer-film-type fuel cell (PEM-FC) system is used as the power supply equipment for transportation and replaces an internal combustion engine. A reduction of the environmental load is expected through the cogeneration system’s (CGS) use of the PEM-FC system as a distributed power supply to individual houses, apartments, and so forth [1–3]. The growing use of distributed power systems, such as fuel cells, the reduction of power-transmission losses, and an increase of waste HEAT recovery are expected. Therefore, the reduction of carbon- dioxide emission is also expected as compared to conventional energy supply methods using commercial electric power.
標簽： Micro-grids Fuel Cell
上傳時間： 2020-06-07
上傳用戶：shancjb
This book was written by Michael Margolis with Nick Weldin to help you explore the amazing things you can do with Arduino. Arduino is a family of microcontrollers (tiny computers) and a software creation envi- ronment that makes it easy for you to create programs (called sketches) that can interact with the physical world. Things you make with Arduino can sense and respond to touch, sound, position, HEAT, and light. This type of technology, often referred to as physical computing, is used in all kinds of things, from the iPhone to automobile elec- tronics systems. Arduino makes it possible for anyone—even people with no program- ming or electronics experience—to use this rich and complex technology.
上傳時間： 2020-06-09
上傳用戶：shancjb
Control systems are used to regulate an enormous variety of machines, products, and processes. They control quantities such as motion, temperature, HEAT flow, fluid flow, fluid pressure, tension, voltage, and current. Most concepts in control theory are based on having sensors to measure the quantity under control. In fact, control theory is often taught assuming the availability of near-perfect feedback signals. Unfortunately, such an assumption is often invalid. Physical sensors have shortcomings that can degrade a control system.
標簽： Observers Control Systems in
上傳時間： 2020-06-10
上傳用戶：shancjb
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：
本設計介紹了一種基于STM32單片機控制的智能水杯,可利用插口式電源或無線充電底座為加熱器提供能量,并在達到某種飲品所需溫度時進行保溫。水杯內置充電電池,可選用USB接口或無線充電。在水杯內部設置無線模塊,用戶利用手機App與水杯進行匹配進行加熱操作,加熱完后水杯會通過手機App和液晶顯示屏實時反饋液體溫度,通過指示燈顯示電量情況等,給用戶進行提醒。該智能水杯設計創新,實用價值較高。This paper introduces an intelligent water cup based by STM32 microcontroller,it can provide energy for the HEATer by socket type power supply or wireless charging base,and hold temperature needed for some kind of drink.Builtedin rechargeable battery,water cup can use USB or wireless charging.The wireless module is set up inside it,and customers can use mobile App to match and HEAT.After HEATing,water cup feeds back liquid temperature through the mobile App,and then displays on LCD,reminds users through the indicator light.The intelligent water cup is designed innovatively and has high practical value.
上傳時間： 2022-03-28
上傳用戶：
為了確保最佳性能，請仔細閱讀本手冊。請將其保存在安全的地方，以備將來參考。將本機安裝在陰涼，干燥，清潔的地方-遠離窗戶的熱源，過多的振動灰塵，濕氣和冷源。避免嗡嗡聲的變壓器，電動機。為避免起火或電擊，請勿使本機遭受雨淋或浸水。絕對不要機柜。如果有東西掉入設備中，請與經銷商聯系。不要在開關，控件或連接線上用力。移動設備時，請先拔下電源插頭和與其他設備相連的電線。切勿自己拉電線。機柜上的開口可確保設備正常通風。如果這些開口被阻塞，則機柜內部的溫度將迅速升高。因此，請避免將物品放在這些開口處，并將其安裝在后方10厘米，兩側20厘米，深30厘米9通風條件確保設備的頂部面板至少留出一定空間。否則不僅會損壞設備，還會引起火災。To assure the finest performance, please read this manual carefully. Keep it in a safe place for future reference Install this unit in a cool, dry, clean place -away from windows HEAT sources, sources of excessive vibration dust, moisture and cold. Avoid sources of humming transformers, motors). To prevent fire or electrical shock do not expose the unit to rain or water.
上傳時間： 2022-04-02
上傳用戶：
VME has been the de-facto bus standard for Commercial off the Shelf(COTS ) Circuit Card Assemblies since the 1980's. VME boards have proven to be remarkably capable of evolving to support newer technologies with innovations such as VME Subsystem Bus, PCI Mezzanine Cards(PMC's) and VME320.However, advances in technologies, appearing particularly in interconnects, have demonstratedthe need for an advance in system development. This advance needs to accommodate high speed interconnect, particularly serial interconnects, and higher power delivery in concert with better HEAT removal.
標簽： vpx標準
上傳時間： 2022-07-27
上傳用戶：bluedrops
