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Among them, the nonlinear impulsive problems and singular boundary problems arise from a lot of branches of applied mathematics and physics, which are at present active fields in analysis mathematics.

其中，非线性脉冲问题和奇异边值问题来源于应用数学和物理的多个分支，是目前分析数学中研究较为活跃的领域。

In the past, there exists difficulty for calculating nearly singular integrals arising from boundary element analysis of the problems of thin body. However, by now, the difficulty of nearly singular integrals has been resolved by analytical integral algorithm, which has been put into uses in analyzing the conventional structures and thin body structures in the potential problems.

过去边界元法求解薄体结构存在着几乎奇异积分的困难，目前几乎奇异积分问题已得到成功解决，解析积分算法也已成功应用于分析二维位势问题常规结构和薄体结构。

In this dissertation, the numerical method solving the model equation influid motion in some sense has solved some tough problems which traditionalmethods cannot, as in the case of capturing shockwave, enhancing resolution, andspeeding computation. In terms of capturing shockwave and enhancing resolution,this method has proved to be superior to difference method; in terms of speedingcomputation, superior to TVD scheme. Particularly, it is highly effective to solveodd singular solution problems.

本文研究的求解描述流体运动的若干模型方程的数值方法，在一定程度上解决了传统方法在某些方面的难点问题，如在捕捉激波、提高分辨率方面优于差分法，在计算速度方面优于TVD格式，特别是对处理有奇异解的问题很有效。

ABSTRACT Some of the problems raised from the H〓 control theory and its applications are studied deeply in this dissertation. They are system model description in robust design problems---linear fractional transformation, singular H〓 problem which occurs when some of the conditions of the standard H〓 problem are not met, and the quadratic stabilization problem is studied from the point of H〓/μ synthesis.

本论文对H〓控制理论及应用中的一些问题进行了深入的研究，着重解决了鲁棒设计问题中的系统模型描述---线性分式变换，以及当H〓标准问题的某些条件得不到满足时所出现的奇异H〓问题。

The sinuosity in multi—lateral negotiation along with the hardship in balancing and harmonizing matter of trade and environment,make many problems beyond WTO system.Analysis of application of GATS about environmental services shows that further research and more efforts are needed in theory and practice of trade and environment problems under the WTO system.

平衡与协调贸易与环境问题的难度与多边谈判的曲折，使许多问题已超出WTO体制的承载，通过对环境服务贸易在GATS协定中的法律适用的分析，反映出在WTO体制下处理好贸易与环境议题，尚需在理论与实践上作出进一步的探讨与努力。

Through the analysis of the features and theexisting problems,the write further points out that China slangy choose a patternof development centered on big cities in stepping towards twenty-one century,reconstruct a new structure,give an impatiens to city infrastructure integrity,market integrity and rational division of labor for economy industry,practicallyreeve various contradictions and problems,gradually reduce regional differencesand promote the whole nation's economy development integratively,coordinately,persistantly and rapidly.

然后进一步分析了中国城市圈域经济的发展特点及存在问题，提出中国在迈向21世纪的经济发展中，应积极选择以大城市为中心的城市圈域经济发展模式，重构区域经济发展的新格局。并通过大力推进城市圈域基础设施一体化，城市圈域市场一体化，以及城市圈域经济产业结构的合理分工和布局，切实解决中国区域经济发展中的各种矛盾和问题，逐步缩小区际差异，促进整个国民经济综合、协调、持续、高速地发展。

The study of bifurcation problems is mainly about how to imply the related concepts and techniques in singularity theory of smooth map germs to bifurcation problems.

研究分歧问题主要是如何将光滑映射奇点理论中的相关概念和技巧适当地引到分歧问题中来。

It could be the solution to snoring problems and relationship problems.

它可以解决打鼾的问题和关系问题。

In feasibility study there are two kinds of problems, that is, the problems of soft science and those of hard science.

人防工程可行性研究中，有软科学和硬科学两类问题。

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。

Don not attempt to do something which you can not to do.

不要企图做那些办不到的事情。

The expression of CTGF and TNF-αweredetected by immunochemistry and the number of Clara Cells was calculated.

光镜下观察肺组织的病理变化，采用免疫组化染色观察肺组织中结缔组织生长因子和肿瘤坏死因子-α的表达和Clara细胞的数量。