控制空间

Facing the safety flying problems that appear during space autonomous proximity operations,we present a safety trajectory control strategy,which is based on space vectors,for solving both collision avoidance and plume contamination avoidance.

针对空间自主临近操作过程中的安全飞行问题，提出一种基于空间矢量的防碰撞和防羽流污染安全轨迹控制策略。

Pulse Width Modulation technique is one of the most important contents in the digital current control. Two PWM algorithms–Asymmetric Regular Sampling PWM and Space Vector PWM, is described. in detail, and then a fast algorithm of Space Vector PWM is got by combining the advantages of the two algorithm.

脉宽调制技术是数字电流控制中的核心内容，文中详细分析了非对称式规则采样法和空间矢量法两种PWM调制方法的原理和计算方法，在对这两种方法比较的基础上，介绍了一种空间矢量PWM的快速算法。

Entrance is indispensability factor of building, it is keystone of forming the sequence space and control the transform of differ space.

而入口是建筑形态构成不可缺少的基本元素之一，它控制着两种不同空间的转换，是形成空间序列和节奏性的关键所在。

At the same time, it puts out the theory of multi-space of technology action, analyses the super circulated procession of technology evolution and its pattern as well as the situs structure of technology orbit space, reveals the law and controlling method of technological evolution.

同时，还提出了地球表层学视野技术活动的多维空间的概念。分析了技术进化的模式、超循环过程和技术系统进化的形式模型及其技术轨道空间拓扑结构，并进一步揭示了技术系统进化的规律和控制方法。

Chapter 2 mainly discusses the basic acknowledge of Sobolev space and Banach spacedifferential, and also discusses basic theory of parameter identification and optimal control ofparabolic distributed parameter system.

第二章主要介绍了Sobolev空间和Banach空间微分学的基础知识，还介绍了抛物型分布参数系统参数辨识与最优控制的基本理论。

Meanwhile, we have gotten stability for the subdifferential of cone efficient point sets and cone weakly efficient point sets of multiobjective programming with respect to perturbation of cone respectively.

对于局部凸拓扑向量空间的多目标规划问题，本文研究并得到当确定空间序的控制锥受扰动，它们的锥有效点集和锥弱有效点集分别在锥次微分和锥弱次微分意义下的稳定性结果。

We explore in detail the relations of these two concepts with the centralized controllable subspace and unobservable subspace respectively, and found out that the structural properties played a key role in them.

文中充分研究了这两个概念分别与集中控制情况下的能控子空间和不能观测子空间之间的关系，发现大系统的结构特性在其中起着关键的作用。

Its structure and property have not been understood clearly. Polyimide wear-out and breakdown can occur under long-term electric stressing due to many different reasons, making their insulating life ended. Wear-out and breakdown of polymers are closely related to the dissipation of electrostatic energy in space charge region.

聚合物的老化和击穿与空间电荷区域静电能的释放有关，电致发光代表材料中分子受激的化学活性强的状态，是能量耗散的方式之一，可作为材料预击穿及结构老化的先兆，是研究聚合物分子中的陷阱结构和它所控制的空间电荷的存贮和输运特性的重要实验手段。

Chapter Ⅴ establishes the spatial model of the medium-low speed maglev vehicle to calculate the lateral dynamic response in the cases of passive guidance and active guidance, the centrically arrangement and offset arrangement of electromagnets. As a result, the comparative analyses indicate active guidance can improve evidently the lateral dynamic performances of maglev vehicle.

本文第五章建立磁浮车辆系统的空间耦合模型，并考虑电磁力的空间耦合作用，比较研究了主动、被动导向和电磁铁横向对中、错位布置下磁浮车辆的横向动力性能，为低速磁浮车辆电磁铁导向结构设计及控制方式的参数选取提供动力学理论依据。

The social level structure is defined from its basic conception, in-depth meaning and characteristics. The term refers to a functional being and social reality, a unity of physical space and value space as well as connectional and theoretical existence. Viewed from the perspective of political philosophy, the social level structure is a political sovereignty grading or ladder in a state who values the supremacy of sovereignty, penetrating into economic, cultural and social fields, universally forming social relationship. Based on general social structure, social system and political sovereignty, the social level structure is an abstractly summary of social hierarchy which is neither a copy of political structure nor simply addition of economic, cultural and social structure. The social level structure is long hidden but universally existing, deeply affecting and shaping social system, people's life and thinking. Based on the above, the thesis probes the social foundation, evolutional law, fundamental quality, running mechanism, historical function, current significant and the reform necessity.

从社会层级结构概念的基本规定、深层意蕴和性状表现三个方面界定社会层级结构概念，认为社会层级结构既是一种实体性存在和社会现实，也是一种观念性存在和理论构造，是物理空间和意义空间的统一；从政治哲学视野，社会层级结构是在政治国家内部按照权力至上的方式形成的权力级别或权力阶梯，并渗透到经济、文化、社会领域，形成具有普遍性的社会关系体系；它以总体社会结构为依托，以社会制度为外化，以政治权力为中轴；它既不是政治结构的翻版，不是社会阶层结构的别名，也不是经济、文化、社会结构的简单叠加，而是对它们层级性的一种抽象和概括；这种结构长期隐而不显，但却无处不在、无时不有，深深地影响和牢牢地控制着社会制度、人的生活和人的思维方式。

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。