难点

Matrix Converter has no free-wheeling path, which makes its fault protection a difficult problem.

矩阵式变换器没有自由续流回路，这使得其安全保护成为一个难点。

This paper introduces the formation and functional structure of a computer test system under the condition of network based on Visual Basic.

介绍了网络环境下的基于Visual Basic计算机考试系统的基本组成和功能结构，同时，就题库的建立和管理、随机成卷系统和评分系统等研制的难点进行了分析，并针对其中的关键技术，提出相应的解决方法。

Different from existing techniques such as robust estimation which detect and eliminate outliers during the adjustment process, this thesis detects and eliminates outliers with fundamental matrix and trifocal tensor before point-line hybrid bundle adjustment to ensure the stability of adjustment

现有的大部分平差理论如抗差估计等都是在平差阶段进行粗差的剔除，如何有效地剔除粗差观测值并获得稳定可靠的平差结果一直是研究的重点和难点问题。

The typical cases of track association such as track furcation,combination and cross are the most difficult.

航迹关联的难点体现在处理几种典型情况，即航迹分叉、合并、相交。

Therefore, the technology of multi-resource data fusion becomes the hot point.

因此，多源数据融合技术成为勘探学界研究的热点和难点。

On the other hand, with the development of reform aiming at building market economy regime, game theory is applied more practically in the construction of economy. Research of share of e-government information using game theory is very theoretic and realistic.

在各国电子政务信息化系统建设中，高效的电子政务信息资源共享往往成为整个信息化建设的重点和难点；另一方面随着我国建立以市场经济体制为目标的改革的不断深入，日臻完善的博弈论理论在我国经济建设中的适用性越来越强，运用博弈论研究电子政务信息资源共享具有较强的理论价值和现实意义。

Gauss kernel function is widely used in support vector machine because of its good prosperities.

但是支持向量机的参数选择一直是支持向量机研究的难点。

While carrying out simulative program design for hobbing machining,the most difficult point is the description and modelling on the relationship between the cutter and gear blank both in space and in motion,especially the modelling of motion relation between cutter and gear blank in case there exists factors of error.

在进行滚齿的切削仿真程序设计中，其中最大的难点是对刀具和轮坯的空间关系和运动关系的描述和建模，尤其是存在误差因素时对刀具和轮坯之间运动关系的建模。

This paper gives a description and comparison of adjectives between Chinese language and Indonesian language from the multiple perspectives of syntactic function and gemination form.

本文主要从句法功能和重叠形式等方面对汉语和印尼语的形容词进行了描写和比较，分析并指出以印尼语为母语的学生在学习和运用汉语形容词时的难点，为对印尼语为母语的学习者的汉语教学提供参考。

From analysis of the differences between the theory of nationalities and regional economics, my thesis abstracts the general reason and finance policy factor.

民族地区经济发展的相对落后，不仅是我国经济发展的一个基本现实，也是我国经济发展的一个十分棘手的突出难点。

In the negative and interrogative forms, of course, this is identical to the non-emphatic forms.

。但是，在否定句或疑问句里，这种带有"do"的方法表达的效果却没有什么强调的意思。

Go down on one's knees;kneel down

屈膝跪下。。。下跪祈祷