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In this paper, about how to realize the wired television bi-directional HFC network technical problems of " the collecting disturbance" and "collecting equalization" were presented because of using the co-axial cable as transmission medium of the branch and going-to-some place by distribution have been solved, and beginning with the noise disturbance analysis, some methods and countermeasures of reforming and settling the problem have been put forward using part of experimental data and theoretic calculation .

本文就如何实现有线电视双向HFC网，解决因以同轴电缆为传输媒质的支线和分配入户网中，存在着"汇集干扰"，"汇集均衡"等技术问题，从噪声干扰分析入手，引用部分实验数据和理论计算，提出了改造解决的一些方法与对策。

Firstly establishing mechanical model of casing structure , and then processing casing forces analysis using space finite-element method and superposition method(put structure stress and outer force stress together), it computes the stress of casing in three dimensions, and gets the internal force and transmutation. The structure of casing-coadjutor is computed overlaply and the question of contact is solved. In the aspect of design, it provides the mixed integer-discrete variable optimization method of casing cross section size and coadjutor layout.

本文就上述两个问题的最优化设计展开研究，首先建立了套管结构的力学模型，进行套管的受力分析，用了空间有限元法和叠加法(结构应力和外载应力相叠加)，对套管进行三维计算，确定结构的内力和变形，对套管—扶正器结构进行整体的叠代计算，解决接触问题；在设计方面，提出了解决套管截面尺寸参数和扶正器布局的混合整数—离散变量优化方法。

Some problems can be solved, such as the deposition of boiler, the loss of cauterization,and the fast augment of the pressure-reduction of the direct current crucible and heater.Therefore, the boiler need not be washed frequently. the run-periodicity of purifyinstrument of coagulator was prolonged, and the service pipe was improved greatly.

采用OT处理后，锅内沉积物量减少、腐蚀损坏降低、直流炉炉管和加热器压降快速升高问题得到了解决、锅炉清洗频率降低、凝结水净化装置运行周期延长、给水管道FAC大有改善等。

The present method has not only solved the field distribution computation of irregular domain, but also overcomed limitations of mesh dividing of the multigrid method when"coarsen"meshes.

本文将一种高效、快速求解Laplacc边值问题的数值计算方法——多重网格法引入到求解电子光学旋转对称场分布问题。

Solved the datum unification and the height joining between the Fujian coastwise topographic map and the water depths map.

以解决福建沿海海岸地形图和水深图的基准统一及高度衔接问题。

Then we use above mentioned theory to study degenerate bifurcations of codimension two in nonlinear oscillator under combined parame-tric and forcing excitation. Thereby stability problems with double zero eigenvalues can be solved.

然后利用上述理论研究了参数激励与强迫激励联合作用下非线性振动系统的余维2退化分叉，从而解决了当解具有两个零特征值时解的稳定性问题。

The formula for effect coefficient of piles group were solved gradually under different shape of laying-out piles according to principle of additional stress superposition.

根据附加应力叠加原理，逐步推导得到不同布桩形式的群桩效应系数计算公式。

This product not merely solves the problem of the coefficient of expansion, solved the regular problems of two kinds of materials again at the same time.

该产品不仅解决膨胀系数的问题，同时又解决了二种材料的固定问题。

In the numerical models of tidal flows, how to deal with the bottom friction coefficient is a very important problem, which has not been solved by now.

在潮汐潮流数值模拟中，底摩擦系数的选取也是一个相当重要但始终没有得到根本解决的问题。

Through process analyzing and algorithm design for the movement of four-component system using method of differential coefficient, the problem of hard finding the maximum force position of the piston-staff by hydraulic pressure traditionally was solved.

采用微分思想对四构件系统的运动过程进行了分析和算法设计，解决了传统方法难于确定液压缸活塞杆最大受力位置的问题。

I hope that this success is just the first in a long series.

我希望这只是成功的开始。

Three dimensional stresses on the interface of tire and soil, tire deflection and soil sinkage are measured.

测试轮胎——沙土界面上的三向应力、轮胎变形和沙土沉陷；建立考虑剪切应力对沙土承载特性产生影响的车轮牵引性能预测模型；分析车轮作用下土壤的纵向稳定性。