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As environmental concerns over traditional lighting increaseand the price of LEDs decreases, high power LEDsare fast becoming a popular lighting solution for offl ineapplications. In order to meet the requirements of offl inelighting—such as high power factor, high effi ciency, isolationand TRIAC dimmer compatibility—prior LED driversused many external discrete components, resulting incumbersome solutions. The LT®3799 solves complexity,space and performance problems by integrating all therequired functions for offl ine LED lighting.
上傳時(shí)間： 2013-10-13
上傳用戶：dongqiangqiang
This application note describes how to decode standard DTMF tones using the minimum number of external discrete components and a PIC. The two examples use a PIC which has an 8 bit timer and either a comparator or an ADC, although it can be modified for use on a PIC which has only digital I/O. The Appendices have example code for the 16C662 (with comparator) and 16F877 (using the ADC). As the majority of the Digital Signal Processing is done in software, little is required in the way of external signal conditioning. Software techniques are used to model the individual elements of a DTMF Decoder IC.
標(biāo)簽： Decoding DTMF with PIC
上傳時(shí)間： 2013-11-21
上傳用戶：zhaoke2005
51單片機(jī)及其應(yīng)用:1.1.1 電子計(jì)算機(jī)的問世及其經(jīng)典結(jié)構(gòu)1946年2月15日，第一臺電子數(shù)字計(jì)算機(jī)問世，這標(biāo)志著計(jì)算機(jī)時(shí)代的到來。（CALCULATOR）ENIAC（“埃尼阿克”）◆ENIAC是電子管計(jì)算機(jī)，時(shí)鐘頻率僅有100 KHz，但能在1秒鐘的時(shí)間內(nèi)完成5000次加法運(yùn)算。◆與現(xiàn)代的計(jì)算機(jī)相比，有許多不足，但它的問世開創(chuàng)了計(jì)算機(jī)科學(xué)技術(shù)的新紀(jì)元，對人類的生產(chǎn)和生活方式產(chǎn)生了巨大的影響 。 匈牙利籍?dāng)?shù)學(xué)家馮·諾依曼在方案的設(shè)計(jì)上做出了重要的貢獻(xiàn)。1946年6月，他又提出了“程序存儲”和“二進(jìn)制運(yùn)算”的思想，進(jìn)一步構(gòu)建了計(jì)算機(jī)由運(yùn)算器、控制器、存儲器、輸入設(shè)備和輸出設(shè)備組成這一計(jì)算機(jī)的經(jīng)典結(jié)構(gòu)。（EDVAC-ELECTRONIC DISCRETE VARIABLE AUTOMATIC COMPUTER）二、微型計(jì)算機(jī)的應(yīng)用形態(tài) 從應(yīng)用形態(tài)上，微機(jī)可以分成三種：
標(biāo)簽： 51單片機(jī)
上傳時(shí)間： 2013-12-20
上傳用戶：d815185728
通過以太網(wǎng)遠(yuǎn)程配置Nios II 處理器 應(yīng)用筆記 Firmware in embedded hardware systems is frequently updated over the Ethernet. For embedded systems that comprise a discrete microprocessor and the devices it controls, the firmware is the software image run by the microprocessor. When the embedded system includes an FPGA, firmware updates include updates of the hardware image on the FPGA. If the FPGA includes a Nios® II soft processor, you can upgrade both the Nios II processor—as part of the FPGA image—and the software that the Nios II processor runs, in a single remote configuration session.
標(biāo)簽： Nios 遠(yuǎn)程 處理器 應(yīng)用筆記
上傳時(shí)間： 2013-11-22
上傳用戶：chaisz
This directory contains utility for implementing generic Reqursive Least Squares (RLS) algorithm. The example shows how one can use the utility to estamate the parameters of a simple linear discrete time system.
標(biāo)簽： implementing Reqursive directory algorithm
上傳時(shí)間： 2014-01-06
上傳用戶：gtf1207
he LPC932 can be used to create a Pulse Width Modulated PWM signal. That s an analog signal, with only 2 discrete levels, for example 0V and 5V and a constant period. The current value of this signal at a certain poiTnt of time is proportional to its Duty Cycle. That s the High Time during one period divided by the period. It can also be calculated as the average value during a particular period. That means after low pass filtering, (e.g. RC circuit) the signal becomes analog, with an actual value controlled by the microcontroller. The PWM functionality enables the LPC932 to control for example the speed of DC motors or the brightness of electric lighting.
標(biāo)簽： signal Modulated analog create
上傳時(shí)間： 2015-05-14
上傳用戶：CHINA526
物流分析工具包。Facility location: Continuous minisum facility location, alternate location-allocation (ALA) procedure, discrete uncapacitated facility location Vehicle routing: VRP, VRP with time windows, traveling salesman problem (TSP) Networks: Shortest path, min cost network flow, minimum spanning tree problems Geocoding: U.S. city or ZIP code to longitude and latitude, longitude and latitude to nearest city, Mercator projection plotting Layout: Steepest descent pairwise interchange (SDPI) heuristic for QAP Material handling: Equipment selection General purpose: Linear programming using the revised simplex method, mixed-integer linear programming (MILP) branch and bound procedure Data: U.S. cities with populations of at least 10,000, U.S. highway network (Oak Ridge National Highway Network), U.S. 3- and 5-digit ZIP codes
標(biāo)簽： location location-allocation Continuous alternate
上傳時(shí)間： 2015-05-17
上傳用戶：kikye
CT圖像重建的變換類算法，該方法采用fourier變換算法
上傳時(shí)間： 2014-01-11
上傳用戶：yd19890720
Included are the files wav1.m, wav2.m, wavecoef.mat and readme. wav2 function implements the tree structured wavelet transform of the input matrix, up to the given level of decomposition. Wav2 uses another function called wav1, which takes the well known wavelet transform of the given matrix. Daubechies wavelet coefficients are used for wavelet transform operation wahich is saved in wavcoeff.mat.
標(biāo)簽： implements the wav Included
上傳時(shí)間： 2015-06-23
上傳用戶：愛死愛死
A series of .c and .m files which allow one to perform univariate and bivariate wavelet analysis of discrete time series. Noother wavelet package is necessary -- everything is contained in this archive. The C-code computes the DWT and maximal overlap DWT. MATLAB routines are then used to compute such quantities as the wavelet variance, covariance, correlation, cross-covariance and cross-correlation. Approximate confidence intervals are available for all quantities except the cross-covariance and cross-correlation. A set of commands is provided. For a description of this example, please see http://www.eurandom.tue.nl/whitcher/software/.
標(biāo)簽： univariate and bivariate analysis
上傳時(shí)間： 2015-06-23
上傳用戶：chongcongying
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