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目前研究现状
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  current research situation in this paper
     and finally the future development of virtual conceptual design is proposed according to the current research situation in this paper.
     针对目前研究现状对虚拟概念设计的未来作了展望.
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     At first, the paper introduces hybrid drive and speed regulation system in general, and discusses the significance of the research, points out the key point and research status, and explains the main contents of this research.
     第一章,首先介绍了混合驱动调速系统的基本知识,在此基础上综合论述了混合驱动调速控制系统研究的意义,指出了混合驱动调速控制系统目前存在的主要技术难点及研究状况,同时介绍了混合驱动调速控制系统目前研究现状,阐述了本论文主要的研究内容。
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     PrefaceIn this part, the author tries to analyze the reasons for using laws to adjust and consummate administration of publishing industry in China from three aspects.
     此部分作者从三个方面简要分析了运用法律手段改进和完善我国出版行政管理的原因,并指出本论文的写作意义、目前研究现状以及本论文拟解决的问题。
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     The second part discusses the theory of rough set, the generalized model of rough set and the developing status of rough set.
     第二部分讨论了Rough集基本理论、Rough集的拓广模型以及目前研究现状和前景。
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     1. Introduction: the research background is presented, survey of recentdevelopment is made, and the main content of the dissertation is as follows.
     第一章首先介绍了论文的研究背景,然后对国内外相关研究领域的研究现状进行了综述,针对目前研究现状中的主要问题,概括了本文论文的主要研究内容与创新之处。
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     Four kinds of bulk amorphous alloys,Cu based,Fe based,Zr based and Mg based are presented in detail in this paper.
     重点对Cu基、Fe基、Zr基和Mg基几种大块非晶合金的形成条件、性能以及目前研究现状等作了详细说明。
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     罗匹尼罗的目前研究现状
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     In this paper, actuality of research for scenario generation has been introduced;
     介绍了想定生成目前研究现状;
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     Current situation of research on deoxidizers
     脱氧剂的研究现状
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The plow bottom surface has been studied variously and in a great quantity by the foreign and native researchers. This paper, in reviewing the past processes of those studies, discussed with regard to three problems, i.e. the theoretical problem in the designing of plow bottom surfaces, the methods of designing of plow bottom surfaces, and the problem of establishing a unified designing equation. The paper proposed at last an initial conception of further development of plow bottom surface studies, This conception...

The plow bottom surface has been studied variously and in a great quantity by the foreign and native researchers. This paper, in reviewing the past processes of those studies, discussed with regard to three problems, i.e. the theoretical problem in the designing of plow bottom surfaces, the methods of designing of plow bottom surfaces, and the problem of establishing a unified designing equation. The paper proposed at last an initial conception of further development of plow bottom surface studies, This conception includes: ( 1 ) The result of researches based on the furrow-slice movement on plow will be used as a starting point of further study;2) bettween the promotion of plowing quality and lowering energy consumption, the main object is the latter; 3) the purpose of the studies is to establish a unified designing equation, this equation should be able to optimize the designing, under conditions that the stub be covered and the furrow-slice be pulverized by action of plow and, being an objective function, the energy consumption(resistance) should be minimized; ( 4 ) in view of the state of current studies, the research work should be started from experiments, finding reasonable modeling of design and other experimental design methods, or studying the processes of plowing, attemptingto use soil-mechanics and hydro-mechanics theory; ( 5 )in order that the experimental research to be proceeded effectively testing techniques and equipments of urgent necessary are proposed.It is the view of this paperthat the various approaches of research started inthis country are not only acceptable but also necessary to promote the rapiddevelopment of research works.

中外学者对犁体曲面曾经进行过多方面的、大量的研究工作。本文仅就三个问题,即犁体曲面设计的几个理论问题,犁体曲面设计方法问题,和建立统一的设计方程问题,回顾了研究工作的进展,本文最后提出了我们进一步开展犁体曲面研究工作的初步设想。达个设想包括:(1)把建立在土垡运动基础上的研究成果,作为进一步研究的出发点;(2)在提高犁耕质量和能量消耗方面,以降低能量消耗为主;(3)以建立统一的设计方程为目标。这个方程应以残茬覆盖和垡片破碎为约束条件,以能量消耗(或阻力)最小为目标函数,实现优化设计;(4)鉴于目前的研究现状,研究工作应首先从实验研究入手,寻求合理的模拟设计方法和其它经验设计方法,也可尝试应用工程土壤力学和流体力学原理,进行犁耕过程的研究;(5)为使实验研究有效地进行,提出了一些急需的实验技术和实验装置的研制项目。 本文认为,目前国内已经开展起来的多种研究途径,不仅是可行的,对于推动研究工作较快地取得进展,也是非常必要的。

Robust system design is one of the most important current research areas in control theory. Time domain method is a very prosperous direction. In this overview, authors first look back on its development briefly, then represent main contributions to this field and comment some advantages and drawbacks existing in hitherto various definitions of robust indices and their correspondent design methods. Based on this discussion, authors expound their own opinions about the outlook of this research area.

鲁棒系统的设计方法是当前控制理论中最重要的前沿课题之一。时域方法是其中的一个重要组成部分,也是近年来非常活跃的一个研究方向。本文用不大的篇幅较为全面地回顾了其发展并介绍了目前的研究现状,评述和讨论了各种鲁棒指标的定义及设计方法的优缺点。在总结的基础上,阐述了笔者对这一研究领域发展前景的展望。

Functionally gradient material(FGM) was a new concept developed by Japanese scientists six years ago. The two sides of FGM are composed of different kinds of materials with different properties to face harsh conditions. While the composition and micro-structure of the materials between the two parts are changing gradiently that there are no interfaces inside FGM. In this way, we can eliminate the non-matching factors of properties in linking parts. This kind of materials will find wide applications and high...

Functionally gradient material(FGM) was a new concept developed by Japanese scientists six years ago. The two sides of FGM are composed of different kinds of materials with different properties to face harsh conditions. While the composition and micro-structure of the materials between the two parts are changing gradiently that there are no interfaces inside FGM. In this way, we can eliminate the non-matching factors of properties in linking parts. This kind of materials will find wide applications and high service value in astronautic technology and nuclear industry. This paper describes the design idea of FGM, the advances on the study of FGM, and the work on FGM conducted by ourselves. Different preparation methods are reviewed and compared.

梯度功能材料是五年前由日本科学家提出的新概念和新思想,其两侧由不同性能的材料组成,以对付苛刻的使用环境;而中间部分的组成和结构又是连续变化的,使其内部界面消失,以减小和克服结合部位的性能不匹配因素。这类材料在航天事业和核工业中有看广阔的应用前景和极高的使用价值。本文着重介绍了梯度功能材料的设计思想、目前的研究现状、以及我们在这方面做的一些工作。并综述和比较了各类制备工艺技术。

 
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