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A sample numerical design method for constant beamwidth beamformer is given. This method is easy to implement and has no restriction on array geometry and sensor patterns; Three methods for the design of broadband frequency invariant beamformer are proposed, which are the method of resampling signals received by the array, the DFT interpolation method and adaptive synthesis method, respectively. Examples and performance analyses are given for each method; A simplified linear constrained minimum variance broadband adaptive algorithm that based on DFT interpolation method is presented. Compared with conventional broadband adaptive algorithms, the presented method can reduce computation work greatly.

提出了一种简单、易于实现的恒定束宽波束形成器设计方法，该方法对阵形和阵元指向性没有任何限制；分别提出了基于阵列接收数据重采样、基于DFT插值和自适应综合的三种具有频率不变波束图的宽带波束形成器设计方法，对于每一种设计方法都给出了一个设计实例并做了性能分析；提出一种基于DFT插值的简化线性约束最小方差宽带自适应阵列算法，该方法可以大大降低自适应阵列的运算量。

In addition,genus distributions of orientable embeddings for given graphs arc provided.

基于此，本文主要是在刘彦佩提出的联树模型的基础上，选择考虑了有趣且有意义的图类来研究其最小亏格问题。

Another method to minimize sensitivity to overdrive is shown in Figure 8.1 l.

另一种将过载敏感性最小化的方法如图8.1 l所示。

As well, ACA outperforms GA in performance on average. 2. Through the analysis and studying of Ant colony algorithm and Flow shop scheduling problem, a construction graph is introduced. Two ant colony algorithms are proposed and analyzed for solving the flow shop scheduling problem with the objective of minimizing the flowtime. The Initialization of parameters and updating of trail intensities and probability is described respectively and a newly local search technique is proposed. Last is the experiment and the comparison shows that the PACA performs better than the FACA in the case of relatively large-sized problems than in the case of relatively small-sized problems.

通过对基本蚁群算法的实现过程和流水调度问题进行研究，给出了求解流水调度问题的解构造图，提出了两种蚁群算法来求解以总流程时间最小为目标的流水调度问题-FACA 蚁群算法和PACA 蚁群算法，分别给出了FACA 蚁群算法和PACA 蚁群算法的参数初始化方式、相对应的信息素更新方法和概率分布规则，并提出了局部搜索模式，最后进行模拟试验，对这两种算法进行比较，试验结果表明：对于较大规模的问题，PACA 蚁群算法要优于FACA 蚁群算法，而对于较小规模的问题，FACA 蚁群算法优于PACA蚁群算法。

The crossing number of a graph is the minimum number of pairwise intersections of edges in a drawing of in the plane.

图的交叉数是指把图画在平面上边与边产生的交叉数目的最小值。

Based on the research on the min-cut partition problem, the author presents an improved KLFM partition algorithm and a graph partition algorithm based on simulated annealing.

在此基础上，本文对最小割划分算法进行深入研究，提出了改进的KLFM划分算法和基于模拟退火的逻辑图划分算法。

by using the software mathcad, the simulative calculation on water quality equalization has been made on a typical water sample. five kinds of mathcad worksheet used commonly the compiling method of mathcad worksheet and the simulative calculation procedure for the minimum effective volume of the equalization basin is presented. the reason for the subtle different in the results of different method is also explained. at last the author shows us the function of water quality equalization by polar diagram.

环境摘要：利用mathcad软件对一个典型水样进行了水质均化的模拟计算，给出了五种常用均质过程模拟算法的mathcad工作表，介绍了mathcad工作表的编制方法及水质均化池最小有效容积的模拟计算步骤，说明了不同模拟算法的计算结果存在细小差别的原因，以极坐标图显示了水质均化的作用。

Many researchers have devoted their work to the development of modal analysis extraction techniques in order to obtain more reliable identification of the modal parameters. There are many damping identification methods, but each one has different merit and defect. In order to find which one is the most reliable method with respect to certain characteristics, this thesis focus on how to identify structure's damping in time domain. The following works have been done in this thesis: 1. Investigate four modal analysis methods——the LSCE Method, the Ibrahim Time Domain Method, the Time Domain Collectivity Modal Parameter Method, the Rational Fraction Polynomial Method and improve on the ITD Method in arithmetic.

本文主要做了如下工作： 1、集中研究了四种常用的模态识别方法，即最小二乘复指数法、Ibrahim时域法、时域总体模态参数辨识法及有理分式多项式法，并对ITD法在算法上进行了一定的改进； 2、建立结构动力模型，利用这四种方法在具体条件下识别结构的阻尼，并绘制相应的图； 3、讨论不同的情况下，不同的识别方法对阻尼识别精确性的影响； 4、基于业已明确的阻尼识别的精确性，根据研究的需要，指出在实际的识别过程中，如何选择最佳的识别方法以及识别过程中需要注意的问题； 5、选择最为精确的阻尼识别方法，以导师李书进教授在日本京都大学防灾研究所强震反应实验室所做的一足尺木制结构房屋的动力测试实验为实测模型，识别其阻尼； 6、在本文的最后，尽作者所知，提出了一些需要改进的地方，并对未来的研究方向给出了作者的建议。

In a stabilised turn, the paraglider is the aircraft with the record of the smallest turning circle, as shown in figure 4 comparing paraglider, hang-glider and sailplane.

在一个稳定的盘旋中，滑翔伞保持了航空器的最小盘旋半径的记录，图四是滑翔伞同悬挂滑翔机和固定翼滑翔机的比较

Minimum system board with the electrical schematic diagram of the simulation system has.

最小系统板与电模拟系统的原理图都有。

It has been put forward that there exists single Ball point and double Ball points on the symmetrical connecting-rod curves of equilateral mechanisms.

从鲍尔点的形成原理出发，分析对称连杆曲线上鲍尔点的产生条件，提出等边机构的对称连杆曲线上有单鲍尔点和双鲍尔点。

The factory affiliated to the Group primarily manufactures multiple-purpose pincers, baking kits, knives, scissors, kitchenware, gardening tools and beauty care kits as well as other hardware tools, the annual production value of which reaches US$ 30 million dollars.

集团所属工厂主要生产多用钳、烤具、刀具、剪刀、厨具、花园工具、美容套等五金产品，年生产总值3000万美元，产品价廉物美、选料上乘、质量保证，深受国内外客户的青睐