查询词典 research and studies

In order to prove the reliability, test studies have been primarily carried out in the indoor soil bin. The data of the vehicle driving state parameters under the same or different terrain are analyzed. The process curves are compared by different control schemes. The theoretical model of the optimum driving state is reliable and fuzzy control scheme is feasible. The disturbances and unknown factors of control system are analyzed. Test results prove that the half-tracked air-cushion vehicle can drive steadily under control of the computer. At the same time the sensors used to measure soil mechanics characteristics on line need to be developed. And it is the important problem to be solved in the future study. The necessary regulation and correction are put up. So the studies in this paper provide some instruction for the further research work.

为了验证本文提出的最佳工作状态及最佳垫压理论，并分析控制系统的可靠性和稳定性，本文在半履带式气垫车的模型车上，在室内土槽中进行了初步的实车性能和理论验证试验，考察了在同种和不同土壤条件下气垫车的行驶状态参数的测量数据，比较了采用不同控制方法下的过程曲线，验证了最佳工作状态的理论模型和模糊控制系统方案的可行性与可靠性，从而保证了采用自整定模糊PID控制器能够使半履带式气垫车在稳定行驶最佳工作状态下；同时通过试验研究，分析了系统中各干扰与未知因素，对控制方案进行了相应的调整和修正，为今后进一步的研究工作提供了一定的指导。

Some key problems of line structured light sensor is given comprehensive studies theoretically and practically, which include the analysis of sensor's mathematic model; the improvement of the key parts of the sensor, the light source and imageforming system; the method of on-line measurement and the evaluate of BGA coplanarity. These studies are supported by corresponding satisfactory experiments. This dissertation covers the following aspects concerning the main work and creative research in the subject: 1. The operating theories and features of pattern measuring methods are systematically introduced.

本文成功地将线结构光传感器应用于BGA芯片管脚共面性的在线测试，并针对线结构光传感器测量的一些关键问题进行了深入细致的研究和探讨：建立了线结构光传感器的模型并对结构参数进行了详细的分析，针对传感器的关键环节—光源和成象系统的改进都提出了创新性的理论和方法，对管脚形状比较复杂的BGA芯片球栅阵列的在线测试方法和评定方法进行了理论研究和实验分析，并获得了满意的结果。

In general, this issue belongs to the category of environmental history. While when it comes to some specific issues, trace element in soil is the cut-in point to study the changes of Chinese ancient society. At the present time, such research method hasn\'t been applied in history studies domestic and abroad so far. Therefore, the studies of the paper are only exploratory and immature researches.Three issues are concerned here:lTrace element in soil under geographical environment and the Hun and the Hsienpei\'s levirate.

本文主要探讨地理环境下的土壤微量元素与中国古代社会变迁的关系问题；在总体上，这一专题是属于环境史的范畴；但在具体问题上，则是以地理环境下的土壤微量元素问题做为切入点，来研究中国古代社会变迁问题的；就目前的情况看，这种研究方法在国内外历史学的研究中尚无先例；所以，本文的相关研究只能是带有一些探索性的、不成熟的研究。

The contrastive research is fully conducted from Chapter Four to Chapter Six. Chapter Four studies negation in English and in Chinese at the lexical level, which can be further divided into three sublevels, namely, morpheme, word, and phrase. Chapter Five studies negative sentences, explicit negative form at the syntacticlevel. And the study covers the classification, syntactic feature, nonassertive/assertive items, scope/focus of negation, two important tendencies, and some common special negative sentences. Chapter Six focuses on the implied negative sentences in English. According 10 devices employed to achieve negation, implied negative sentences are divided into four categories, namely, implied negative sentences by grammatical devices, by semantic devices, by rhetorical devices, and by pragmatic devices.

从第四章到第六章具体地展开了英汉否定对比研究：第四章的研究在词汇平面上进行，分为语素、词语和词组：第五章对比研究了在句子平面上英汉否定中的显式现象—否定句，主要涉及否定句句法特征和分类、句型转换、否定范围和否定焦点、全句否定和局部否定、转移否定、双重否定、部分否定和全部否定、强调否定和否定问句回答等方面；第六章集中研究了英语含蓄否定句，按照一个含蓄否定句采用何种手段实现意义上的否定进行一下分类，把含蓄否定句分为四类—通过语法手段实现的含蓄否定句，通过语义手段实现的含蓄否定句，通过修辞手段实现的含蓄否定句，通过语用手段实现的含蓄否定句。

The Department of Zoology and Physiology is primarily dedicated to teaching and research zoology and physiology including basic studies of ecosystem function, biogeochemistry, population biology, evolution, organismal biology and cell physiology to applied studies related to human disease, wildlife conservation and environmental toxicology.

动物学和生理学系主要致力于动物学与生理学科的教学与研究，学科范围包括生态系统功能、生物地球化学、种群生物学、进化、有机体生物学和细胞生理学的基本研究，到对人类疾病、野生植物保护和环境毒理学的应用研究。

Criminal policy, as a cross-subject and cross-specialty synthetic subject, exceeds the range of criminology that particularly studies crimes and criminals and also exceeds the range of penology that studies the reform, education and control of criminals. So its much difficult to research.

刑事政策学作为一门跨学科、跨专业的综合性学科，它既超越了作为纯规范科学的刑法学，也超越了专门研究犯罪现象和犯罪人的犯罪学，超越了以犯罪人的改造、矫正和治理措施为研究对象的刑罚学，因此，研究难度较大。

The first chapter, the Introduction, will make a description with five case studies on the use and misuse of statistical estimate methods in the regional economic studies, in order to reveal the objective, significance and necessity of this dissertation, and also, the basic structure of the conducted research.

作者首先从5个具体实例着手，描述统计测度方法在区域经济研究中的应用和误用，阐明撰写本文的目的、意义、必要性和全文研究的基本框架。

This paper studies the invariant, which is the linear preserving problem based on generalized inverse of matrices. The generalized inverse of matrices and the research status of preserving problems of generalized inverse are outlined. In the basis of deeply understanding the basic knowledge of linear maps, the definition, characteristics of generalized inverse and decomposition of matrix, the author analyzes the decomposition form of preserving idempotence and preserving tripotence in the PID, then studies on the linear maps form of preserving group inverses of symmetric matrices.

本文研究的不变量是矩阵广义逆线性算子的保持问题，概述了广义逆矩阵，广义逆保持问题的研究现状，在对线性映射的基础知识，广义逆矩阵的定义、性质和矩阵的分解深入理解的基础上，深入分析了保幂等、保立方幂等矩阵在主理想整环上的分解形式，继而研究了保对称矩阵群逆的线性算子形式。

In this paper are displayed recent advances in studies on Turgenev and his works. Among them are:1. Turgenev and his works are approached in a comprehensive way and from various angles;2. New theories and new methods for research are stressed and adopted in practice;3. Influential academic monographs have been published;4. Comparative studies are to become a new trend.

本文从以下几方面，展现我国近十年来在屠格涅夫研究上的新进展；（1）全面多角度研究，及新观点的提出；（2）新理论，新研究方法的重视及运用；（3）出现有影响的学术专著；（4）比较研究将成为新的趋向。

Virtual Museums, like physical museums, should be developed to fulfill the missions such as educational activity, exhibition, recreation and research. However, most of the studies in virtual museums merely focus on topics such as technique, user interface and educational support services, only a few studies concentrate on users' experience in virtual environment.

虚拟博物馆本应承袭实体博物馆的展示、教育、娱乐与研究使命而发展，然而目前研究重心却多偏重於技术发展、系统好用性及如何支援正式学习之相关议题，关注使用者如何在虚拟环境中经历自发性的学习者尚属少数。

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。