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The paper has four chapters:The first chapter summarizes the research achievements of the natural calamities of Eastern Han Dynasty.

正文共分四章：第一章回顾总结了东汉自然灾害的研究现状。

Based on the above research, the author summarizes some main indexes of network and eigenvalue analysis.

空间分析是GIS的核心，空间关系则是空间分析与空间推理的基础和桥梁。

First, the dissertation summarizes the properties, developing state and application fields of BLDCM, then its fundmental structure; operation principle and control strategy is also presented. On the base of roundly analyzing all kinds of the drive motor in electromotion type railway switch, BLDCM is proposed to replace the formerly traditional DC motor in railway switch. Second, the whole design scheme and key technology of control system is put forward based on analyse of the technical parameters and requirements.

首先，论文介绍了无刷直流电动机的特点、发展和应用概况，分析了稀土永磁无刷直流电机系统的基本构成、工作原理和控制方法；在对目前各种电动转辙机驱动电机分析的基础上，提出将稀土永磁无刷直流电机用于铁路转辙机，以替换原有的串励有刷直流电动机。

This paper summarizes teaching experiences about the fundamental technological curriculum on the basis of electrotechnics, and introduces several practicable methods, for example,by using contrast method, emphasizing the content contact of each part, giving some questions, undertaking summarization, etc.

以电工学为例，对技术基础课程的教学经验进行了总结，介绍了几种行之有效的方法，如使用对比教学法、注意各部分内容之间的联系、善于提出问题、进行归纳总结等等。

The paper emphatically summarizes the classification, thinking mode, present status, problems and devolopment of methods for solving nonlinear system of equations, and specially recommends some practical and new methods, such as the elimination by eliminant with aid of basic sets, homotopy method and decomposition method, etc.

综述了机构学中常见非线性问题的数学模型及其解法，着重述评非线性代数方程组解法的分类、求解思路、研究现状、存在问题和发展方向，特别推荐基组结式消元法、同伦法和分解法等实用新型的解

Based on the characteristics of biomass fuel, this article summarizes the sources of alkali metals in biomass and the elutriation and migration.

在明确了生物质燃料特点的基础上，对生物质中碱金属元素的来源和析出迁移规律进行了概述。

This paper analyzes and summarizes the evolution, current status and implications of econometrics in China based on the key embranchment.

本文正是以计量经济学这个关键的分支学科的应用为着眼点，分析和总结计量经济学在中国的发展史、现状和启示。

Theoretically, the present thesis is based upon the encouragement theory in the study of administration. The literature of the thesis is mainly devoted to the survey of research at home and abroad in two aspects: the young teacher development and encouragement mechanism. Methodologically, the thesis is a case study of Northwest Normal University. With the statistical analysis of the status quo of teaching and research, as well as the demand of research of the young teachers in the university, the thesis treats the current encouragement system, summarizes the conspicuous problems and then advances countermeasures in the research enragement system of young teachers in these universities based upon the qualitative and quantitative studies.

本文以西方管理学激励理论为指导，以国内外青年教师培养和科研激励机制研究方面的文献为参考，以西北师范大学为个案，在对西北师范大学青年教师科研和教学现状统计分析、科研需求调查统计分析、现行科研激励机制审视的基础上，采取定量与定性相结合的研究方法，概括出西部教学研究型大学青年教师科研激励机制方面存在的主要问题，并分析存在问题的原因。

The epilogue summarizes the innovation of this dissertation and points out the problems that should be further studied.

结语阐述了本研究的创新之处和有待进一步研究的课题。

Epilogue summarizes the characteristics of the election in 1912, and further emphasizes the significance of this thesis.

结语对全文做简要的概括，再次阐明美国1912年大选的特点，进一步强调研究这一课题的重要意义。

On the other hand, the more important thing is because the urban housing is a kind of heterogeneity products.

另一方面，更重要的是由于城市住房是一种异质性产品。

Climate histogram is the fall that collects place measure calm value, cent serves as cross axle for a few equal interval, the area that the frequency that the value appears according to place is accumulated and becomes will be determined inside each interval, discharge the graph that rise with post, also be called histogram.

气候直方图是将所收集的降水量测定值，分为几个相等的区间作为横轴，并将各区间内所测定值依所出现的次数累积而成的面积，用柱子排起来的图形，也叫做柱状图。