种

The following are main points in the thesis.(1) On the basis of widely researching of the domestic and overseas references, there are four types of depolarizers being summed up and introduced in this thesis, the four types are spatial averaging depolarizer, time averaging depolarizer, fiber ring depolarizer and spectral averaging depolarizer.

本论文主要完成的工作是：(1)在查阅了大量的文献的基础上，总结了四种类型的退偏器，空间偏振态平均退偏器、时域平均退偏器、光纤环退偏器、光谱平均退偏器，并分别对四种类型的退偏器的工作原理进行了深入的研究，为每种退偏器的设计方法建立了数学模型。

Buyingcommercial proverty is a static maintain-value investment.The obturate space provided by the property objectively focus people's life on a conservative pattern.Purchasing a car is a active dynamic investment.The car will become more depreciatory but it can bring people to remote place and bigger circle freely and produces more active communion between people and city in the social meaning and psychic need.

买商品房是一种相当静态的保值型投资，这种不动产提供的封闭空间，客观上将人的生活固定在一种保守的模式上；而买车是一种积极的动态投资，就汽车本身来说会越来越贬值，但在社交的意义和精神需要上，它能自由地将人带往很远的地方和更大的圈子，使人与城市产生更活跃的交流。

Any of various usually woody vines of the genus Derris of tropical Asia whose roots yield the insecticide rotenone; several are sources of native fish and arrow poisons.

热带亚洲鱼藤属的任何一种木质藤本植物，其根产出一种属于杀虫物质的鱼藤酮；该属有几种植物当地用作鱼毒和箭毒的原料。

Transform : Applies a specified function object to each element in a source range or to a pair of elements from two source ranges and copies the return values of the function object into a destination range.

该算法有两种形式：一种采用的是一元函数，作用到区间中的每个元素上；另一种采用的是二元函数，同时作用到两个区间中相互对应的元素上。

In history and reality, the contradiction between needs and limited resource always exists. From the view point of system-science, it can be concluded that:①The interaction among need-contradiction-ability is the perpetual force for enterprise evolution (and the evolution of other living systems). The improvement of "ability"is the process and result of evolution.②The competition and coordination among systems is the direct power for enterprise evolution. Competition produces various system actions. Coordination makes systems complement their functions with each other. The interactions of competition and coordination push enterprise into the flow of evolution and optimization.③The"stochastic fluctuation"of the system, which is accidental finding, is another force for enterprise evolution. It is a deterministic element in the process of the self-organization of enterprise.

在历史和现实中，需要和满足需要资源稀缺之间的"问题"是恒久存在的，从系统科学的角度可以演绎出：①需要一问题一能力三种异质要素的相互作用是企业进化（其它一切有生命系统进化）的永恒动力，"能力"的提高正是进化的过程和结果；②各系统间的竞争与协同是企业进化的直接动力，竞争产生多样化的系统行为，协同则使各系统间优势互补，竞争与协同交互作用推动企业呈现出进化与优化的趋势：③系统的"随机涨落力"即意料之外的发现与创新是推动企业进化的又一种动力，它是企业自组织过程中带有必然性的力量：④在解决"问题"中创新者的作用不可低估，但更为根本地说创新者只是"需要一问题一能力"这三种要素相互作用的载体，个体的创新是企业自组织过程的必然结果。

Two forms of implicit TVD schemes are proposed in this paper for the simulation of nonequilibrium flows past hypersonic re entry vehicle, which are derived from the diagonal form of an approximate factorization algorithm and lower upper scheme applied to the implicit part of Harten Yee's TVD scheme respectively.

针对高超音速化学非平衡流提出了两种隐式格式。一种是近似因子分解算法对角化形式在隐式TVD格式上的推广，另一种可视为隐式TVD格式的LU分解形式。

It is easy to full seeds in bell-mouthed hole, and it is easier to enter for seed into the circular hole than quad-rate hole; the performance of cotton precision seed-metering device has relation greatly to w of dibbler, the critical o is 975 degrees's while the device is in better status by simulation.

下标 max约为975°/s。零速投种和排种轮线速度以及播种机进给速度都有关系，但若取适当的行程速比系数，则基本可实现零速投种，仿真获得该系数为42。

A rubber composition for a tire improving friction performance on ice, comprising 0.5 to 20 parts by weight of a nonmetallic fiber having an average fiber diameter of 1 to 100 μm and an average fiber length of 0.1 to 5 mm, and 0.5 to 30 parts by weight of a filler having at least 2 projections and an average length of the projections of at least 10 μm based on 100 parts by weight of a diene rubber, and a pneumatic tire comprising the same.

提供了一种改善冰上摩擦性能的轮胎用橡胶组合物，以及含有该橡胶组合物的充气轮胎。一种轮胎用橡胶组合物，以100重量份的二烯橡胶为基准，还含有0.5～20重量份平均纤维直径为1～100μm并且平均纤维长度为0.1～5mm的非金属纤维，以及0.5～30重量份的具有至少2个突起并且平均突起长度至少为10μm的填料，以及一种含有该橡胶组合物的充气轮胎。

One is based on the structural difference,and the other is based on the structural difference and multiple sequence alignment.

同时，本文提出了两种RNA有害突变预测的方法，一种是基于结构差异的方法；另外一种是基于结构差异与多序列序列比对的方法。

Finally the terminal rule of Genetic Algorithms has been proposed and the implementation of random number maker has been presented. Developed a genetic algorithms based system identification technique. Using this technique globally optimized models for linear and nonlinear system can be identified without the need of a differentiable cost function or linearly separable parameters.

然后提出了一种基于遗传算法的模型降阶方法，可一致地应用到连续系统和离散系统的模型降阶；最后提出了一种基于遗传算法的多目标通用控制器设计方法，可以满足不同的控制策略，而不是某一种特定的控制策略，计算机仿真结果充分验证了方法的正确性和有效性。

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。