研究

A mig (mannose insensitive germination) mutantpool, which was created with T-DNA insertion by Kenneth Feldmann, University ofArizona (ecotype Wassilewskija-2, Ws-2), was obtained from the Nottingham ArabidopsisStock Centre, UK. mig3 is one line of the mutant pool, which was thought as aputative mutant for having a high germination rate (about 70%) on MS media containingabout 5-7.5 mM mannose. Lately, the mig3 was found there are some special characteristicsin two French labs by Laurent Signore and Marlire Dieuaide.

本文作者就是以这一突变体为研究对象，开展了有关控制mig3突变体的基因的定位研究研究；并同时开展了在几种糖及其衍生物诱导下的光合作用有关基因表达的研究；这一突变体在开花前后几种糖分含量的调查；开花习性及形态方面的调查。

For example, it is stall need to study the thermal equation-of-state, to find a proper methodology for calculating self-diffusivity, to propose a better potential model for mullite and sillimanite, to calculate mechanical properties at high temperature, and to analyze the structural transformation at high temperature.

本研究所建立的研究方法与流程适合应用在陶瓷材料的模拟与分析，而我们已经探讨了莫来石的缺陷对晶体结构、晶格常数、热膨胀、体模数、缺陷能、氧扩散的影响，接下来可以朝向以下几点深入研究，包含研究热状态方程式、找出最适当的方法来计算扩散系数、提出更好的分子势能模型、研究莫来石在高温下的相变化与力学性质。

In the study of the stochastic chaos in simple pendulum, the random Melnikov process is derived and the mean-square criterion is used to determine the threshold amplitude of the bounded noise excitation for the onset of the chaos or random chaos in the system. For the coupled simple pendulum and harmonic oscillator, the Melnikov function is used to determine the condition for the onset of chaos in the case of Hamiltonian perturbations. In the case of non-Hamiltonian perturbation, the generalized random Melnikov process and mean-square criterion are used to determine the threshold amplitude of the bounded noise for the onset of random chaos.

在随机混沌研究中，应用随机Melnikov过程的均方准则研究了单摆在有界噪声激励下发生混沌或随机混沌时有界噪声激励的临界幅值；对于耦合的单摆-谐振子系统，先用Melnikov函数研究了在哈密顿扰动下发生混沌的必要条件；然后用推广的随机Melnikov过程方法研究了在非哈密顿扰动下发生随机混沌的必要条件；用最大Lyapunov指数及Poincaré截面方法结果与上述理论结果作了对比。

In order to research the overall dynamic performance of the robot,firstly,a overall structural design of the robot is carried out,and a 3D model of the 5-Dof robot is established in the Pro/E environment,then a three dimensional dynamic simulation research of the kinematics and dynamics is carried out using the ADAMS software,finally the rationality of the system design is discussed as well as the significance in the practical application according to the output results,which have been measured in the simul...

为了研究机器人的总体动态性能，首先进行了机器人的总体结构设计，并在 Pro/E环境下建立了五自由度机器人3D机械装配模型，运用ADAMS软件对其进行了运动动力学的三维动态仿真研究，最后根据测量输出结果讨论了系统设计的合理性以及在实际应用中的意义。对机器人的后续研究，这些研究成果具有一定的参考价值。

The main jobs of this paper are as followed: 1 The reuse of the frame design technology for aircraft assembly fixtures is researched. a frame line part library is built with the templet driven technology, the reuse of the frame line part come true by the tools for instantiation and instance modification. The design resources are effectively used, some repeating work is cut. 2 Two methods to obtain the assembly feature are proposed: the straight way by the Enumeration method and the indirect way by project features to the assembly plane. All of the assembly features of the frame and the adjustable bearings are obtained by these two methods which makes the frame automatic assembly technology for aircraft assembly fixtures come true. 3 The frame automatic assembly technology aircraft assembly fixtures based on assembly features is researched. A binary tree assembly model is used to express the assembly information of the frame for aircraft assembly fixtures, the automatic assembly between the frame, the aircraft and the adjustable bearing is completed within the three steps: distribute, obtain and evaluate assembly feature. Finally, the efficiency of the frame assembly design is proved. 4The frame interpart modeling technology for aircraft assembly fixtures is researched, the intersection methods are concluded and the arithmetic of the single-cut, double-cut and inter-cut intersection is proposed, the interpart fast modeling of the frame design for aircraft assembly fixture come true. 5Based on the researches mentioned before, a sub-system of frame fast design for aircraft assembly fixture is developed on CATIA. The sub-system is used to design the aircraft assembly fixtures in a large aeronautics corporation and make a good- effect.

论文的主要工作如下： 1研究了飞机装配型架骨架设计重用技术，在总结归纳骨架线框结构类型的基础上，应用模板驱动的方法建立了骨架线框库，通过骨架线框零件的实例化和离线编辑实现骨架线框的重用，有效利用设计资源，减少重复劳动； 2提出穷举几何对象的装配特征直接获取方法，遍历零件模型的几何对象，从中捕捉所需装配特征，该方法简捷、高效；提出向装配面投影的装配特征间接获取方法，该方法在现有特征基础上生成装配特征，解决了部分装配特征难以直接获取的问题； 3研究了基于装配特征的飞机装配型架骨架自动装配技术，采用一种二叉树装配模型表达骨架的装配关系，并通过装配特征的分配、获取和赋值三个步骤，实现了骨架分别与飞机产品和可调支承的自动装配，避免了繁琐的人工交互操作，提高了骨架设计的效率和规范化程度； 4研究了飞机装配型架骨架零件间建模技术，在总结归纳骨架元件相贯处理方式的基础上，提出了骨架元件单剪切相贯、双剪切相贯和互剪切相贯的实现算法，简化了骨架相贯处理的过程； 5基于以上研究，在CATIA平台上开发了飞机装配型架骨架快速设计子系统，并应用于某大型航空企业的装配型架设计，提高了设计效率和设计质量。

Some people introduce subphotosphere magnetic charges or dipole, which can fit magnetic field on the photosphere, then the separatrix and separator above and on the photosphere can be located, the comparison between their location and location of flare ribbon support the idea of magnetic reconnection. It is called Source Method. Some people extrapolate magnetic fields of photosphere to corona by some method, then use QSLs method to investigate the relations between flare ribbons and magnetic field topology. Some people study relations between flare ribbons and singular point on the plane above photosphere. Some people investigate magnetic topology by analyzing magnetic field of photosphere directly.

或者以观测的光球磁场为基础，来构造光球下的磁荷或磁偶极等光球下磁源，进而研究光球上的磁拓扑结构与耀斑的关系；或者利用各种外推方法将光球磁场进行外推，然后用准分隔层的方法来研究磁拓扑结构与耀斑的关系；或者利用势场模型外推光球磁场，然后研究光球之上平行于光球的某一平面的两维奇点与耀斑的关系；或者直接利用观测的光球矢量场来研究磁场拓扑。

The bulk of solid-state physics theory and research is focused on crystals , largely because the periodicity of atoms in a crystal — its defining characteristic —facilitates mathematical modeling, and also because crystalline materials often have electrical , magnetic , optical , or mechanical properties that can be exploited for engineering purposes.

固体的内部结构和运动形式很复杂，这方面的研究是从晶体开始的，因为晶体的内部结构简单，而且具有明显的规律性，较易研究。以后进一步研究一切处于凝聚状态的物体的内部结构、内部运动以及它们和宏观物理性质的关系。这类研究统称为凝聚态物理学。

In foundation of predecessors'massive work about the regional tourism theories and the regional tourism space cooperation researches, writer utilizes multi-disciplinary especially economic geography and the regional tourism theories to make a preliminary study about Liaoning regional tourism product exploitation according to the research frame " the foundation theories research- the model factor analysis- the target strategy frame- the strategic research ".

在前人关于区域旅游规划、区域旅游空间合作的研究所做的大量工作的基础上，结合运用多学科特别是经济地理学和区域旅游规划的相关理论，按照"基础理论研究——模型因素分析——目标策略框架——深化战略研究"的研究思路与框架统领全文的研究进展。

The research ofthis field is at the beginning in our country,and less than that in foreign country.There are no more experimental works on SPDC in our country.The other reason thatI want to devote myself into this field during my Ph.D.is to fulfill the blank in ourcountry and to catch up with the other country.

量子通信的实验研究在国内起步较晚，实验与国外的差距较大，利用双光子纠缠态的实验研究目前在国内基本上是一片空白，本人将该领域的研究作为博士论文研究课题，旨在填补国内空白，缩小差距。

With the help of these new techniques, researchers have got some important findings in the field of bilingual lexical representation, special bilingual encephalic regions, brain mechanism of early/late and fluent/nonfluent bilinguals, and the relation between difference of first and second language brain mechanism of bilinguals, etc.

目前，在fMRI、ERPs技术框架下的双语认知研究，在双语词汇研究、加工语言的脑机制研究等方面已取得不少成果，这些技术与成果对汉语作为第二语言研究具有积极的启示意义。

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。