系数问题

By this parametrization, the problem of identifying AR and MA parameters is converted into one of identifying a new group of parameters.

从而将ARMA参数的辨识问题转化为传递函数参数表示中有界谱函数的分子和分母系数辨识问题。

PID controllers based on the interval polynomial stabilization theorem;2. Not only the H ∞ norm calculating guestion of the robust stability of the mixed-type perturbation in the interval polynomial family is studied, but also the range which can be done is enlarged to that of the more general linearly dependent cofficients perturbation.

本文讨论了不确定性系统的鲁棒稳定性分析问题，不仅研究了区间多项式族混和摄动的鲁棒稳定性中H∞的计算问题，而且将研究的范围从区间多项式族扩展到更具一般性的线性相关系数摄动的系统，以值域断面的几何性特为基础，提出了一种形象直观，简便实用的混和型摄动系统鲁棒稳定性的分析方法。

The inverse solution of the thermal conductivity was obtained by computing the expatiation of the posterior probability density functions.

对利用Bayesian模型分析热传导反问题中的导热系数预测问题的方法进行了研究。

The systematic analyses and studies, including stability analyses, optimum schemes, optimum choice of coefficient, optimum sequence of values for the acceleration parameter and optimum relaxation parameter, etc.

三、运用模型方程对二维高效AF2迭代算法的格式稳定性，最佳格式系数分列准则以及有关加速参数，松弛因子的选择等问题作了系统的分析和研究；并对三维模型方程的AF2迭代算法格式稳定性问题作了讨论和分析。

The primary studying works and characteristics:1 To summarize reinforcing theory of cement mixing pile composite foundation2 To analyze the primary mechanics characters and changing rules of cement mixing pile, based on analysis of test data both indoor and outdoor.3 To discuss siding frictional resistance, ending resistance, ultimate bearing capacity of simple mixing pile and effectiveness factor of grouped piles, loading ratio of soil between piles under cushion cap of grouped piles and stress ratio of pile and soil and so on, and use many computation method and experimentation method to ensure bearing capacity of mixing piles composite foundation.4 To point out and analyze eight sides flaws and problems of the bearing capacity calculation method of mixing pile compositefoundation which ensured by national and normative method/ formula.5 To apply test results of loading tests and a few settlement observation data, use gray theory to predicate ultimate bearing capacity of deep mixing piles, actual example demonstrate engaging between theoretical predicted value and actual value.6 To apply groovy layerwise summation method to discuss entity piles method, double foundation method, equivalent layerwise summation method and consolidation theoretical method and so on, especially by combination of engineering example, use FEM to calculate or discuss the settlement and changing rules of composite foundation.7 To discuss problems of critical length of composite foundation by combination of engineering example and numerical analysis method, and analyze the contrast of critical length between simple pile load and most area load of composite foundation, not only critical length of composite foundation is relative to modulus ratio between piles and soil, but also upside load distribution area of composite foundation.

主要的研究工作与特色为：(1)总结了水泥搅拌桩复合地基的加固原理；(2)在对室内外试验资料进行统计分析的基础上，系统分析了搅拌桩水泥土的主要力学特性及其变化规律；(3)探讨了搅拌单桩的侧摩阻力、端阻力、极限承载力及群桩效率系数、群桩承台下桩间土荷载分担比及桩土应力比等，提出用多种计算方法并结合试验方法来综合确定搅拌桩复合地基的承载力；(4)明确指出和分析了按国家有关规范的方法确定搅拌桩复合地基承载力所存在的八个方面的缺陷与问题；(5)利用过去没有加载至破坏阶段的载荷试验成果和较少的沉降观测数据，尝试了用灰色理论预测深层搅拌桩的极限承载力，实例表明理论预测值与实测值吻合较好；(6)在常规分层总和法的基础上，探讨了复合地基沉降计算的实体墩基法、双层地基法、等效作用分层总和法、固结理论法等，特别是结合工程实例，用有限元数值计算等方法计算和讨论了搅拌桩复合地基的沉降及其变化规律；(7)结合工程实例，用数值分析方法探讨了复合地基临界桩长的问题，指出和分析了单桩荷载下的临界桩长与复合地基大面积荷载下的临界桩长存在很大的差别，复合地基的临界桩长不仅与桩土模量比有关，而且与复合地基上部荷载分布面积有关。

With the development of technology, some problems concerning east-and-west facing residential solarization and ventilation have been resolved. With the capacity unchanged of living area, an increase in the proportion of east-and-west facing residence , is considered to be as effective measures to conserve land, enhance the capacity of population and solve the housing problem for more people.

随着技术的发展，东西向住宅的西晒、通风等问题已经解决，在居住区内建筑容量不变的情况下增加东西向住宅的比重，是节约用地的有力措施；还可以提高建筑系数、提高人口容量，解决更多人的住房问题。

A revised branch and bound algorithm based on the idea of Horst (1976) is developed to minimize the tangent plane distance function to determine the thermodynamic stability of a postulated solution for the liquid phase equilibrium described by UNIQUAC or UNIFAC activity coefficient equations.

分支限界法是近年来发展起来的一种用于求解全局优化问题的确定性算法。在本文中，针对由UNIQUAC或UNIFAC活度系数方程描述的液相稳定性分析问题，我们发展了一种用于最小化切平面距离函数的改进的分支限界法。

For overcome nonlinear terms of any degree in the equation, we made a proper transformation according to the structure of the equation at first, make the equations into ordinary differential equation. Then solve the ordinary differential equation exactly, by auxiliary functions method and undetermined the coefficient method and algebraic computer system Mathematica.

为了克服方程中非线性项的任意次幂，我们采用的方法是首先根据方程的特点，做适当的变换，使原问题转化为常微分方程的问题，其次对该常微分方程再进行各类变换，如辅助函数法以及待定系数法……。

Firstly applying the notion of appropinquity in fuzzy mathematics to solve the scientific choice of optional instances. Secondly using synthetical judge to confirm the amendatory coefficient of territorial and separate factor. Lastly applying appropinquity and choosing close principle again to rationally confirm the appraisal result.

1应用模糊数学的贴近度概念来解决市场比较法应用中的可比实例的科学选择问题，用模糊数学的综合评判法来确定区域因素和个别因素修正系数，最后再次应用贴近度和择近原则较科学地解决了估价结果的合理确定问题。

The Jacobi pseudospectral methods are applied to numericalsolutions of singular differential equations,differential equations in infinite intervals andin disc.

事实上，通过适当的变量代换，我们可把无界区域问题转化成某些特定的退化系数的有界区域上的奇异问题。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。