The project will develop a bandpass sigma-delta analog-to-digital converter for digital audio broadcasting system in three years. In the first year, we had finished the system simulation for IF receiver using conventional high speed ADC and bandpass sigma-delta ADC, respectively. We also had done the analysis and design of high-order bandpass sigma-delta modulator structure. In this year, we have developed a coefficient synthesis method for high order bandpass sigma-delta modulator using high order filter transfer functions (inverse Chebyshev bandreject filter function).

本計(jì)劃將在三年內(nèi)發(fā)展一個(gè)能應(yīng)用在數(shù)位音訊廣播系統(tǒng)的帶通sigma-delta類比/數(shù)位轉(zhuǎn)換器(analog-to-digital converter，ADC)羞羞网站在线观看入口免费，在第一年度中我們分別以傳統(tǒng)高速類比/數(shù)位轉(zhuǎn)換器及帶通SD類比/數(shù)位轉(zhuǎn)換器的接收系統(tǒng)為例日日爽日日操，并結(jié)合編碼正交多工器(Coded Orthogonal Frequency Division Multiplex，COFDM)的技術(shù)亚洲一区二区三区在线观看视频，建立一套DAB系統(tǒng)模擬的方法日韩亚洲午夜在线影院，同時(shí)并研究有關(guān)高階帶通SD類比/數(shù)位調(diào)變器的架構(gòu)及電路，并已成功開發(fā)出一個(gè)由高階濾波器合成的高階帶通調(diào)變器三级片在线免费观看网站视频。

To fill an order; to put an order through; to carry out an order

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For the compressible materials, in order to satisfy the higher-order compatibility equation of the rate of deformation in the centered fan sector, which is a quite difficult problem unresolved in the previous studies, a particular term must be added to the expansions of the stress components in the regular logarithmic power series adopted by many researchers before. A higher-order near tip field with tangential velocity jump ahead of the crack tip is derived first, of which the dominant terms are the solution widely accepted.

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In order to achieve the company's staff of scientific management in order to protect the production and operation, working and living a normal order, optimize the effective protection of staff, efficient and pragmatic work, employees must comply with state and local laws and regulations, take good care of public property, study and master Job skills needed, solidarity and cooperation, work to complete the task.

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That is out of order queue, and then re-sort, in order to effectively access and send the host request data, the implementation of a command in the hard disk at the same time, the queue to join the new side-by-side waiting for the implementation of the order of operations.

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In order to use spectral analysis theory to calculate s econd-order wave forces which naval architectures suffered in the random sea wa ves, the second-order wave forces which naval architectures suffered in any one regular wave or any two regular waves should be calculated firstly.

為了采用譜分析方法預(yù)報(bào)海洋結(jié)構(gòu)物和船舶在隨機(jī)海浪中所受的二階波浪力，必須先求得海洋結(jié)構(gòu)物和船舶在任意單色波和雙色波中受到的二階波浪力成人四虎激情免费视频网站大全下载。

This dissertation investigates the construction of pseudo-random sequences (pseudo-random numbers) from elliptic curves and mainly analyzes their cryptographic properties by using exponential sums over rational points along elliptic curves. The main results are as follows:(1) The uniform distribution of the elliptic curve linear congruential generator is discussed and the lower bound of its nonlinear complexity is given.(2) Two large families of binary sequences are constructed from elliptic curves. The well distribution measure and the correlation measure of order k of the resulting sequences are studied. The results indicate that they are "good" binary sequences which give a positive answer to a conjecture proposed by Goubin et al.(3) A kind of binary sequences from an elliptic curve and its twisted curves over a prime field F_p. The length of the sequences is 4p. The "1" and "0" occur almost the same times. The linear complexity is at least one-fourth the period.(4) The exponential sums over rational points along elliptic curves over ring Z_ are estimated and are used to estimate the well distribution measure and the correlation measure of order k of a family of binary sequences from elliptic curves over ring Z_.(5) The correlation of the elliptic curve power number generator is given. It is proved that the sequences produced by the elliptic curve quadratic generator are asymptotically uniformly distributed.(6) The uniform distribution of the elliptic curve subset sum generator is considered.(7) We apply the linear feedback shift register over elliptic curves to produce sequences with long periods. The distribution and the linear complexity of the resulting sequences are also considered.

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In order to reduce the number of nodes as much as possible for 3-D ironless PM motor structure, the first-order and the second-order ABCs operators for box-shaped and cylinder-shaped truncating boundary conditions are derived according to the structure of ironless PM motor.

為了盡可能減少節(jié)點(diǎn)的數(shù)量黄色一级网站视频在线观看，結(jié)合無鐵心永磁電機(jī)的具體結(jié)構(gòu)欧美亚洲综合另类国产情拍图，推導(dǎo)了適合于盒形截?cái)噙吔绾蛨A柱形截?cái)噙吔缟虾啽阋仔械囊浑A和二階標(biāo)量漸近邊界條件算子，該算子具有簡單鲁鲁在线视频、有限元實(shí)施容易的特點(diǎn)在线视频中文字幕日韩精品一区二区。

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Fiber testing instrumentation is used worldwide by all sectors in the textile chain the gin,(in order to evaluate the quality of the material sold) the trader,(in order to evaluate the quality by grading) and the yarn spinner in order to bland the cotton well before spinning

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