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Then according to the research of the state matrix, a concept that the system general damping coefficient keeps constant is proposed, which is helpful for understanding the interaction of all the dynamic components and impacts for the distribution of dampings.

论文在回顾特征值分析方法基本概念、步骤的基础上,通过对系统状态矩阵的研究,提出了广义系统阻尼守恒的概念,这便于理解系统中各动态元件的相互影响和对系统阻尼分配所起的作用。

S the size of the device scales down, conventional nonvolatile memory has encountered some problems, such as the base mechanism. In recent years, many kinds of novel nonvolatile memories are investigated widely to substitute for the conventional nonvolatile memory.

bstract:随著元件尺寸的持续缩小,传统的非挥发式记忆体由於其基本机制因由而面临许多问题的产生,因此,近年来许多新型态的非挥发式记忆体被广泛的研究,以试图能够取代传统的非挥发式记忆体。

In transmission and distribution system,transformer is a basic component of energy conversion.

在电网中,变压器是电能转换的最基本的元件,但常规变压器难以对供电可靠性的提高和电能质量的改善作出贡献。

According to the operating characteristic of the fluidics and the theory of hydromechanics, a dynamic model of the impactor is established, in order to bring the percussive rotary drilling technology into full play. Also a simulation program is developed to calculate the working properties of the impactor. By using the simulation program, the variation laws of the basic parameters of the hydraulic impactor under different structural parameters and hydraulics are obtained.

为充分发挥冲击旋转钻井技术的应用效果,在考虑射流元件工作特性的基础上,运用流体力学理论建立了液动冲击器工作动力学模型,并编制了计算液动冲击器性能参数的模拟程序,通过模拟计算程序得到了在不同液动冲击器结构参数和钻井水力参数下液动冲击器基本参数的变化规律。

Stability of resonator with thermal lensing inside is discussed by optical transmission matrix. The fluctuation range of thermal focal distance affects the laser power and the beam quality.

运用光学传输矩阵的分析方法对内含热透镜元件谐振腔的稳定性进行了分析,讨论了热焦距的波动性对激光输出功率和光束质量的影响,提出了固体激光器谐振腔设计的基本原则。

In this thesis, several basic principles and phenomena of the Wave Optics are first intruducted briefly, they include the Huygens—Fresnel principle, diffraction of light ,Fresnel diffraction and Fraunhofer diffraction etc.

本文首先简要的介绍了衍射光学元件所涉及的波动光学中的几个基本原理和现象:惠更斯—菲涅耳原理、光的衍射、菲涅耳衍射和夫琅禾费衍射等。

The family is the most fundamental unit in society.

家庭是社会最基本的元件。

In the design of automatic control system for isomerization unit from heptane tower of PX devices, single-loop control is used in the control programme. There is a total of 11 circuit , of which is 8 single-loop control system and 3 cascade control system. It has done the choice and relevant calculation on the controller, control valves and measurement devices used in the control system. There is a total of eight chapters in this design.

在对PX装置异构化单元脱庚烷塔自动控制系统进行设计时,控制方案基本采用单回路控制,总共有11个设计回路,其中单回路控制系统8个,串级控制系统3个,并对控制系统所要用到的控制器,控制阀和测量元件等进行了选择且进行了相关的计算。

The experimental results and their mechanisms are systematically analyzed The results show that the relationships about stress-strain, stress-temperature and strain-temperature of SMA helical spring in the three basic application forms are non-linear, and Hooke's law can not be directly used in design.

对试验结果及其机理进行了系统分析,试验结果表明,SMA弹簧元件在 3种基本使用状态下的应力—应变—温度关系呈现非线性,设计中不能直接应用虎克定律。

Transmission line is the most common element of power system and its harmonic model must consider the influences of the skin effect and the earth return path effect.

输电线路是电力系统最基本的电气元件,其谐波模型必须包含集肤效应、大地回流效应的影响。

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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。

The new PS20 solar power tower collected sunlight through mirrors known as "heliostats" to produce steam that is converted into electricity by a turbine in Sanlucar la Mayor, Spain, Wednesday.

聚光:照片上是建在西班牙桑路卡拉马尤城的一座新型PS20塔式太阳能电站。被称为&日光反射装置&的镜子将太阳光反射到主塔,然后用聚集的热量产生蒸汽进而通过涡轮机转化为电力