查询词典 order relation

Based on the model of Logistic, Levins and Tilman, the model of exponent, restoration of habitat,habitat overlap has been put forward systematically and probe into the following questions :how do the evolutional characteristic of meta-population in different regions, the relation between the extinction order of animals and the degree of habitat destruction upon by human activities.

本文主要研究了以下问题：1、不同区域集合动物种群的演化特点、动物物种灭绝的顺序与人类活动对栖息地破坏的&度&的关系2、人为增加或恢复部分栖息地，对不同区域集合种群里强弱不同的物种种群的演化、繁衍将产生什么影响？

Firstly, this part introduces (Agreement on Safeguards confining voluntary restraints, and mendings clarifying articlel9 in GAJT1947; then elaborates the defects existing in this agreement, such as: unforeseen developmentSN adjusting industi^ the non-governmental measures adopted or maintained by public and private enterprises etc, provide the room for voluntary restraints to exist; finally, points out the aspects should be mended and strengthened in this agreement in order to confine voluntary restraints better.The forth part is the relation between China safeguard clause and voluntary restraints. Firstly, this part introduces the present situation about China safeguard clause, there being no clause concerning voluntary restraints, then analyzes the reality of voluntary restraints existing in China from international and domestic aspects, pointing out there is necessity to confine it; finally, puts forward some suggestions for China safeguard clause to regulate voluntary restraints.

首先，就GATT 1947第19条关于援用保障措施的实体和程序方面的要件进行介绍，作为下面分析的背景；其次，在前面介绍的基础上，对该条款的缺陷，诸如：缺乏对援用保障措施关键要素的明确具体界定、没有限定保障措施的形式以及补偿与报复等方面进行分析，阐释了由于这些缺陷的存在，使各成员方对该条款进行任意曲解甚至规避，导致自愿设限游离于GATT规则之外，成

The design basis and methods are discussed in the areas such as the use of energy, the conservancy and seal of heat, natural ventilation, the use of mid-water, the afforestation, and the materials of ecological architecture. All these are considered on the basis of the elemental relation between architecture and natural environment in order to make people have a deeper understanding and grasping of such a design.

本文试图从建筑与自然环境的基本联系入手，从能源利用、保温隔热、遮阳、自然采光、自然通风、中水利用、绿化、生态建材等方面阐述生态建筑的设计原理与设计方法，使我们对生态建筑的设计有深入的了解和掌握。

In order to reduce the influence of position error in every standstill-position of turntable on north-seeking precision, the work process of the Dynamically Tuned Gyro multi-position north seeker and the principle of the azimuth arithmetic are introduced, and the relation between position error and north-seeking precision is analyzed.

针对实验过程中转台在每个转位处存在的转位误差对系统寻北精度的影响，介绍了动调陀螺多位置寻北仪的工作过程及真北解算原理，进行了转位误差对寻北精度影响的误差分析。

Aiming at disjunction of microcosmic researches and macroscopical researches and status quo of theory basis researches of Aeolian sand movement near the sand bed, based on plenty of experiment data in wind tunnel, this thesis studies some microcosmic researches including the number of lift-off sand grains percent time percent sand bed area and relative movement parameters of saltating sand grains by combined methods of mechanical and statistical mechanical theories. Then, this thesis develops in advance a relation between the microcosmic researches and macroscopical researches in order to describe truly the theory model of some macroscopical physical variable of Aeolian sand movement.

本文针对当前风沙运动微观与宏观研究相脱节、准确描述近地面风沙运动规律的理论基础薄弱的现状，基于大量风洞实验数据，通过对沙床面单位时间单位面积起跳沙粒数、沙粒跃移运动过程中相关参数等微观问题的研究，力图建立风沙运动微观与宏观研究的联系桥梁，以期能够准确描述风沙运动宏观量变化的理论模型。

Then the algorithm was used to get the seven parameters of viscosity model of W-Ni-Fe heavy alloy and 316L stainless steel feedstock, which provide the necessary material data for quality forecast of mold core part made of stainless steel and heavy alloy tungsten ball, and for optimal design of mold and process parameters, which establishes the foundation of material database of MIM. In the research of visual simulation software development, in order to build the software system model and flow analysis algorithm based on Cross-WLF viscosity model, and realize functions such as pre-processor, solver, parameter regress, data management, graph operations, some advanced software methods as OOSE (Object Oriented Software Engineering) and UML were applied to set up user model, static model and dynamic model of MIM simulation software. These models describe system function, event flow, structure and relation of classes, object interaction, structure of database and I/O file format.

在MIM可视化仿真软件开发方面，为了建立软件系统模型及基于Cross-WLF粘度模型的流动分析算法，实现软件的前处理、求解器、参数拟合、数据管理和图形操作等功能，将面向对象软件工程与统一建模语言技术首次引入到MIM仿真软件的设计开发中，建立了软件的用户模型、静态模型和动态模型，描述了系统的功能需求、事件流程、类的结构与关系、对象之间的通信、数据库结构和输入输出文件格式等，用Visual C++与Delphi开发工具编码实现了2维MIM充模流动过程仿真软件，方便了对薄壁零件的质量预测以及模具和工艺参数的优化设计。

In the research of visual simulation software development, in order to build the software system model and flow analysis algorithm based on Cross-WLF viscosity model, and realize functions such as pre-processor, solver, parameter regress, data management, graph operations, some advanced software methods as OOSE (Object Oriented Software Engineering) and UML were applied to set up user model, static model and dynamic model of MIM simulation software. These models describe system function, event flow, structure and relation of classes, object interaction, structure of database and I/O file format.

在MIM喂料注射成形性能研究方面，针对毛细管流变仪测试法衡量流动性能的不足，提出使用螺旋线模具测试喂料熔体的注射成形性能，创造性地设计了一套可快换浇口，模腔封闭的螺旋测试模，并在螺旋测试模上采用正交实验设计，得出了高密度重合金喂料流动长度L_m的回归公式，揭示了L_m随Q_m、P_m、△T_m和凡的变化规律，并得出工艺参数对成形性能影响的强度顺序为Qm最大，尸m与△几其次，因而改善喂料流动性能应优先控制注射速率Qm。

The article presents the developing condition of PWM and SVPWM first.Then the theory of SVPWM is discussed in detail.The SVPWM is based on the thought of magnetic chain tracking.It makes the ideal magnetic chain circle of three-phased sysmmetry electric motor supplied by three-phased sysmmetry sine wave voltage for basis,uses the practical magnetic chain vector formed by the different switch modes of three-phased inverter to track the basic magnetic chain circle.During the course of tracking,the inverter changes the switch modes properly to form the PWM waves.Then the modulation wave of SVPWM is analyzed in detail.The modulation wave of SVPWM is implicit,but the analogous modulation wave in A-B-C axis needs to be calculated in order to expose the internal relation of SVPWM and SPWM.That is to show the implicit modulation wave of SVPWM. SVPWM actually is a transformed SPWM ruly sampled by the modulation wave which is injected by the zero prefaces based on space vectors.

本文首先对脉宽调制技术的发展现状进行了综述，在此基础上分析了电压空间矢量脉宽调制技术的发展现状；接着对空间电压矢量脉宽调制技术的基本原理进行了详细的分析和推导，SVPWM是基于磁链追踪的思想，它以三相对称正弦波电压供电下三相对称电动机定子理想磁链圆为基准，由三相逆变器不同开关模式下所形成的实际磁链矢量来追踪基准磁链圆的，在追踪的过程中，逆变器的开关模式作适当的切换，从而形成PWM波；然后详细分析了电压空间矢量脉宽调制技术的调制波，虽然SVPWM法的调制波是隐含的，但是为了揭示SVPWM法与SPWM法的内在联系，需要求出SVPWM在A-B-C坐标系上的等效调制波，也就是将SVPWM的隐含调制波显化；SVPWM实质是一种基于空间矢量在三相正弦波中注入了零序分量的调制波进行规则采样的一种变形SPWM。

" World economy and political forum " it is Jiangsu the technicality publication that institute of economy of world of academy of sciences of society of province of director of province society academy of sciences, Jiangsu sponsors , in order to study world economy and international politics problem are given priority to, track issue of the heat in world economy and international politics domain, focus, key, mirror; of newest research achievement to set economy of finance of international trade and investment, international, international HongKong and Macow of safety of development of politics of strategy of delta of economy of relation, foreign country, the Yangtse River, international, abroad, foreign relations, international, stage considers to wait for a column.

梗概： 《世界经济和政治论坛》是江苏省社会科学院主管、江苏省社会科学院世界经济探究所主办的学术性刊物，以探究世界经济和国际政治新问题为主，追踪世界经济和国际政治领域中的热点、焦点、重点新问题，反映最新探究成果；设有国际贸易和投资、国际金融、国际经济关系、外国经济、长江三角洲、国际战略、国外政治发展、外交关系、国际平安、台港澳探究等栏目。

In order to find a way of spark timing intellectual control on automotive gasoline engine,the relation between a CS492Q gasoline engine performance and the spark advance angle is obtained by engine bench test,and a fuzzy controller which controls spark timing is proposed.

为探索车用汽油机点火智能控制的有效方法，对 CS492 Q汽油机进行台架实验，在得到汽油机性能与点火提前角关系的基础上，以汽油机曲轴转速变化量和转速相对于点火提前角增量的变化率为模糊输入量，点火提前角增量为模糊输出量，建立模糊控制器，对汽油机点火正时进行模糊控制仿真。

However, as the name（read－only memory）implies, CD disks cannot be written onorchanged in any way.

然而，正如其名字所指出的那样，CD盘不能写，也不能用任何方式改变其内容。

Galvanizes steel pallet is mainly export which suits standard packing of European Union, the North America. galvanizes steel pallet is suitable to heavy rack. Pallet surface can design plate type, corrugated and the gap form, satisfies the different requirements.

镀锌钢托盘多用于出口，替代木托盘，免薰蒸，符合欧盟、北美各国对出口货物包装材料的法令要求；喷涂钢托盘适用于重载上货架之用，托盘表面根据需要制作成平板状、波纹状及间隔形式，满足不同的使用要求。