多电路的

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).

本计划将在三年内发展一个能应用在数位音讯广播系统的带通sigma-delta类比/数位转换器(analog-to-digital converter，ADC)，在第一年度中我们分别以传统高速类比/数位转换器及带通SD类比/数位转换器的接收系统为例，并结合编码正交多工器(Coded Orthogonal Frequency Division Multiplex，COFDM)的技术，建立一套DAB系统模拟的方法，同时并研究有关高阶带通SD类比/数位调变器的架构及电路，并已成功开发出一个由高阶滤波器合成的高阶带通调变器。

The basic theory of the algorithm for test pattern generation using satisfiability is explored, including represent method of SAT-ATPG, search algorithm and analyses of achievement techniques. We describe how to represent circuits and fault detection problem as Conjunctive Normal Form . We improve an effient search algorithm suited to ATPG based on basic satisfiability algorithm.

本文研究了组合逻辑电路测试向量自动生成的可满足性方法，主要进行了可满足性的测试生成原理、实现算法、性能提高和测试向量的最大压缩等方面的研究，改进了一种有效的测试生成搜索算法SAT-ATPG，提出了隐含多路敏化的故障效应单路定向传播方法SOPCA、控制输入跟踪算法CIT和测试衍生算法TD，取得了较显著的效果。

Three reference current detecting methods are presented for single-phase active power filter, i.e. fundamental current detecting method based on parallel resonance of passive LC filter, fundamental current detecting method based on switched-capacitor filter, harmonic current detecting method based on d-q transformation and its improved circuits.

同样通过采用并联变压器二次侧多补偿绕组的结构来提高有源电力滤波器的容量。4、提出三种单相有源电力滤波器指令电流的提取方法，即基于LC并联谐振的基波电流检测方法、基于开关电容滤波器的基波电流检测方法、基于单相d-q变换的谐波电流检测方法及其改进电路。

The paper holds the idea that, parallel bus can;t adapt to high-speed transfers due to self-limitations, and high-speed serial point-to-point bus will substitute for traditional parallel bus; data transfer will not be carried out simply by drive circuit and parallel bus, but by special high-speed serial bus; the traditional mode of single bus loading multi-device is disappearing, and a centralized switch module is replacing the bus function in a mode of one switch module connecting all devices via high-speed point to point serial bus.

文章认为并行总线由于自身缺陷，已经不适合进行高速传输，高速串行点对点连接将代替传统的并行接口；数据交换也不再是简单地通过驱动电路和并行数据线进行，而是通过特殊的串行高速总线连接；传统的在一条总线上同时挂载多个设备的模式正逐渐消亡，总线功能已被一个集中式的交换模块取代，而交换模块和各个设备都是通过高速串行点对点的方式进行连接。

In order to complete the task of detecting and tracking infrared dim objects much faster, the paper introduces an effective hardware design. Image pre-processing is completed by implementing Top-hat arithmetic in FPGA, which mitigates the DSPs' task greatly, so, it is able to do more operations in the limited time, and the system's real-time requirement can be fulfilled better.

为了以更快的速度完成对红外弱小目标的检测与跟踪任务，将图像的预处理电路放在FPGA里实现，通过完成Top-hat算法使后续DSP的处理大大减轻任务，使其在有限的时间内能够完成更多的运算，这在很大程度上保证了系统的实时性。

To deal with the problem that Electrostatic Separation of waste circuit board is high in purity, whereas relatively low in output/capacity,we developed multi-cylinder electrostatic separator and waste circuit winnower which is developed on the principle that the specific gravities of copper powder/grain and plastics are remarkable different..

另外针静电分离对废旧电路覆铜板的分离纯度高而产量比较小，我公司开发的多滚筒静电分离机和根据粉碎后的电路板中铜粉与环氧树脂粉的密度比重差距比较大的原理研制的废旧电路板气流分选机解决了分离产量问题。

An auxiliary power motor with improved structure includes wheel shell, rotor ring, stator plate, central wheel axle and control circuit.

一种改良结构的辅助动力马达，包括轮壳、转子环、定子盘、中心轮轴及一控制电路，转子环的内环面埋设磁铁，定子盘周围固设环形矽钢片，其外环面具有多个T形齿牙，其齿数为非转子环磁铁数的公倍数，矽钢片设有三相星形线圈绕组，且于定子盘电机最佳启动角度处设有霍耳元件组；借此将定子盘固设于中心轮轴，令轮壳夹设住转子环并套设于中心轮轴两侧，当转子环旋转时，即可降低磁极间的钝齿转矩，令电动车行进更加顺畅无噪音。

The article introduces communication theory of FM at first, recommend one more pair of sound receive the basic operation principle of telephone transmitter MT8888C and commonly used work pattern frequently more, then regard realizing receiving and dispatching DTM F signal as the typical interface circuit that the example provides MT8888C and 89C51 and control the software.

文章首先介绍了FM的通信理论，再介绍双音多频接收发送器MT8888C 的基本工作原理和常用的工作模式，然后以实现收发DTM F 信号为例给出了MT8888C 与89C51 的典型接口电路和控制软件。

One continuing trend in computer development is microminiaturization, the effort to compress more circuit elements into smaller and smaller chip space.

计算机发展的一个持续不断的趋势是微小型化，亦即努力将更多的电路元件压缩在越来越小的芯片空间上。

One continuing trend in computer development is microminiaturization, the effort to compress more circuit elements into smaller and smaller chip space.

计算机发展的一个持续不断的趋势是微小型化，亦即将更多的电路元件压缩在越来越小的芯片空间上的努力。

This one mode pays close attention to network credence foundation of the businessman very much.

这一模式非常关注商人的网络信用基础。

Cell morphology of bacterial ghost of Pasteurella multocida was observed by scanning electron microscopy and inactivation ratio was estimated by CFU analysi.

扫描电镜观察多杀性巴氏杆菌细菌幽灵和菌落形成单位评价遗传灭活率。