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Abstract The paper mainly deals with the design of hardware for an automatic fire fighting system, which aimed at closed combustible places. This system adopts single chip microcomputer with smoke sensor and temperature sensor as the detective devices. By using the single chip microcomputer, it c..
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The traditional electron safe alarm system mainly is through the sensor automatic detection, produces the alarm, sends out the alarm from the scene or reports to the police through the special electric cable near distance, and thus causes people's vigilance. Through many years research and the de..
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Abstract The Brushless DC (BLDC) variable-speed drive is widely used because of its particularly high mechanical power density, simplicity, and cost effectiveness. A software rotor position generation has been implemented on the DSP Controller family, thus saving the mechanical position sensor co..
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Abstract. In this paper we revisit the concept of mandatory access control and investigate its potential with personal digital assistants(PDA). Only if applications are clearly separated and Trojans cannot leak personal information can these PDAs become personal trusted devices. Limited processin..
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Image enhancement processes consist of a collection of techniques that seek toimprove the visual appearance of an image or to convert the image to a form bettersuited for analysis by a human or a machine. In an image enhancement system, thereis no conscious effort to improve the fid elity of a re..
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Abstract—This paper proposes an active common-noise can-celer (ACC) that is capable of eliminating the common-mode volt-age produced by a pulsewidth modulation (PWM) inverter. An emitter follower using complementary transistors and a common-mode transformer are incorporated into the ACC, the des..
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A LabVIEW-based self-const ructed chemical virtual inst rument ( VI) has been de ve loped for deter m ining temper atures and pres-sures. It can be put to gether easily and quickly by selecting hard ware modules, such as the P CI-DAQ card or ser i al por t method,different k inds of sensors, sig ..
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Abstract: Introduce a convenient used eternal temperature control circuit, draw the schematic diagram and give out a list of components and installation methods. Keywords: Eternal temperature; Control circuit 摘 要：介紹一種使用方便的恒溫控制電路，繪出其原理圖并給出元件清單及安裝調(diào)試方法。關(guān)鍵詞..
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AbstractIn recent decades, the cost of acoustic technologies has declined dramatically. Advances in networks, storage de-vices, and power management have made it practical to consider the remote location of sensors. Nonetheless, manychallenges remain for the fabrication, deployment, and use of re..
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