主要动力

A broad inderstanding of basic technical theory in energy and power ergineering, including mechanics, thermology, electrical engineering and electronics

系统地掌握本专业必需的技术基础理论，主要包括力学、热学、电工与电子、自动控制及能源动力工程基础理论等

In this paper we study mainly the topological structures of some invariant sets and entropy of continuous self-maps on Warsaw circle and unstable mainifold s and entropy of continuous self-maps on a tree.

本文主要研究了华沙圈上连续自映射的一些不变集的拓扑结构、拓扑熵和树上连续自映射的非稳定流形和拓扑熵等某些动力性质。

In this paper we study mainly the topological structures of some invariant sets and entropy of continuous self-maps on Warsaw circle and unstable mainifolds and entropy of continuous self-maps on a tree.

中文摘要：本文主要研究了华沙圈上连续自映射的一些不变集的拓扑结构、拓扑熵和树上连续自映射的非稳定流形和拓扑熵等某些动力性质。

Beijing hung Electric Vehicle Co., Ltd. is a master of domestic electric vehicles, hybrid electric vehicle design and production of one of the manufacturers, the main design and manufacture of environmental protection, safety, energy-efficient new electric vehicles, currently has a tourist vehicles, car clubs, golf carts, flatbed, tractor and so on 5 big series more than 30 varieties.

北京鸿马斯特电动汽车有限公司是国内电动汽车、混合动力汽车设计和生产的厂家之一，主要设计和生产环保、安全、节能的新型电动汽车，目前已形成旅游观光车、会所用车、高尔夫球车、平板车、牵引车等5大系列30多个品种。

For giving an explaintion of strong transmogrification but feebleness metamorphism of and their corresponding relation of the Triassic stratum in Songpan-Ganzi area and opening out the temperature and stress condition, this paper summarized study production of predecessors, and put forward 5 conclusions about Songpan-Ganzi area Triassic main lithology(slate, sandrock,and blastopsammitic) through field geological investigation , actual measurement section plane study and combining indoor slice identification , electron probing and fluid enclosure testing analysis:1.Field outcrop strongly transmogrification, and often developed same cleavages(S1) erection or approximately erection 'B'fold and symmetry similituded fold. 2.The metamorphosed mineral combination is simple, and the typical metamorphosed mineral combination is Al+Chl+Ser+Cc+Q, etc. The metamorphosed mineral develops mainly along the cleavages of the territorial cleavages faces(S1), bearing territorial dynamic metamorphism character and belonging to the lawsonite-albite-chlorite face of slightly metamorphism. 3.Territorial metamorphism P-T change focus on T:180～200oC, P:1～2kbar

为了对松潘-甘孜地区三叠系强变形浅变质的特征及变质与变形的对应关系作出解释，揭示变质与变形的温-压条件，本论文总结前人研究成果，通过野外地质调查和实测剖面研究，结合室内薄片鉴定、电子探针和流体包裹体测试分析，对松潘-甘孜地区三叠系主体岩性(板岩、砂板岩、变质砂岩及千枚岩)的变质作用得出5 个认识结论：1、整个松潘-甘孜地区经受了自北向南的强大挤压；2、变质矿物组合简单，除雏晶黑云母外，典型的变质矿物组合为Al+Chl+Ser+Cc+Q等，变质矿物主要沿区域性劈理面(S1)的劈理域发育，具有区域动力变质作用特征，属于低级变质作用中的硬柱石-钠长石-绿泥石相；3、区域变质作用P-T 变化集中在T：180～200oC，P：1～2kbar

The regions which good quality jadeites should be determined by the four constraints as fellows: 1. In the subduction or collision zone; 2. In the ultrabasic rock bodies especia1ly in duniue bodies; 3. HP～UHP metamorphism zone; 4. Long duration deformation and metamorphism after rock forming.

优质翡翠的成矿预测与找矿靶区的确定应是符合以下四个条件的地区，即：a俯冲带或碰撞带内；b超基性岩体主要是纯榄橄岩体内；c高压与超高压区；d后期发生过长期的动力变质变形作用。

This paper is on the basis of analysedding and summarized that these projects were blown up and tested materials in the past, use fracture mechanics, the dynamics blast theory and finite element analytical method, have carried on the system, detailed analysis and describes to this kind of method of blasting, proving theoretically that can cut the base rock effectively in this kind of method of blasting, reduce base blowing up stress value inside the rock , play and protect underpart base rock blow up into the function influenced in vibration, and blew up mechanism and analysed the main influence factor blown up according to it, had put forward the rational optimization measure to the relevant parameter when implementedding and blown up .

本文在分析总结以往这些工程爆破试验资料的基础上，运用断裂力学、爆破动力学理论及有限元分析方法，对这种爆破方法进行了系统、详细的分析及论述，从理论上证明此种爆破方法可以有效地切割基岩面，降低基岩内部的爆破应力值，起到保护下部基岩不受爆破振动影响的作用，并根据其爆破机理分析了爆破的主要影响因素，对实施爆破时的相关参数提出了合理的优化措施。

With the test model of underwater vehicle based on undulatory propulsion of long flexible fin as background, the paper mainly studied how to construct the test system which can satisfy the static and dynamic hydrodynamic force and moment measurement requirements of diversified test models of underwater vehicle fixed at arbitrary attitude.

以基于仿生柔性长鳍波动推进的水下机器人试验模型为背景，主要研究如何构建满足多种水下机器人试验模型在各种姿态下流体动力／力矩的静态与动态测量要求的测试系统。

Meanwhile, it will obstruct to set up and to perfect the social system of unemployment benefit under market economic system.

通过分析得出以下主要结论：第一，下岗政虽然在一定程度上促进了劳动力市场的形成，但随著下岗职工失业持续时间的延长，下岗政策已成为阻碍动力市场化的因素，同时也妨碍了市场经济体制下社会失业保障体制的建立和完善。

The results show that this wide range precipitation produced under the deep warm ad vection condition and lower jet stream provided the water vapororig in for this precipitation.The meso -scale closing echo displayed in ladar echo explained that meso-scale and micro-scale system enhanced and developed un...

结果表明：此次降水是在深厚的暖平流条件下产生的大范围降水，低空急流为此次降水提供了水汽来源；而雷达回波上表现出中尺度弥合回波，说明在局地动力和热力条件下加强发展的中小尺度系统是造成此次暴雨的主要原因。

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。