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From the motion equation of the bar which vibrates one-dimensionally and longitudinally, the model of mechanical four-terminal network and the transfer equations are set up, and the natural frequency equation of coniform horn and the ratio of speed of vibration are derived.

从变截面杆作一维纵振动的运动方程出发，建立机械四端网络的数学模型及传输特性方程，导出了圆锥形变幅杆的频率方程和振速比。

Based on experiment and energy conservation law, the mathematics model of the combustion synthesis is set up.

目前对于燃烧合成铁基复合材料的研究较多，但通常都是在较高的温度下完成的。

According to the principle of mass conservation, the kinetic model of SCFE is set up founded on differential extraction, and the mass transfer in SCFE is analyzed.

根据质量衡算原理，建立了基于微分床萃取的超临界流体萃取的动力学数学模型，从理论上分析了超临界流体萃取的传质过程。

According to the principle of mass conservation, the dynamic model of SCF-CO_2 is set up on differential extraction base on determining the extracted conditions.

在确定了最佳工艺条件的基础上，根据质量守恒原理，建立了基于微分床萃取的超临界流体萃取动力学模型，从理论上分析了超临界流体萃取过程中各因素对提取率的影响情况，并对模型中的主要参数进行了讨论。

Under a continuous fault model of the actuator,the consistency conditions of two indices fault-tolerant performance are set up by linear matrix inequality approach,and the ranges of constraint indices are analyzed.

在连续型执行器故障的模式下，利用线性矩阵不等式技术，给出了2个指标约束下容错性能的相容性判别条件，分析了与区域极点指标相容的H∞指标的取值范围，并在相容指标约束下给出了满意容错控制器的设计方法。

The biggest characteristic of this model is that the hydraulic system pump station, operating console and working clamp installation table can be installed and connected in users sites and dived the test workpiece into the pond, can lift up and down, left and right two directions clamp worktables set 90 degree overturn function, especially suitable for gas pressure test.

本机型最大特点由液压系统泵站，操作控制台和工作夹紧装置台在用户现场安装连接，将试验工件潜入水池中目测，可上下升降，左右两向夹紧工作台设有90度翻转功能，特别适应气体压力试验。

By combination of balance equations of electron energy, current continuity equation and distribution function of electron energy, a model to simulate the coaxial RF discharge is set up.

结果表明：对于同轴环形波导，存在三种形式的低耦合损失谐振腔结构，即半共焦结构、半共心结构和平行平面腔结构。

Two dimensions mathematics model is set up by continuous equation and Ergun equation to discuss gas flow character.

并利用连续性方程和Ergun方程建立气体等温流动的二维数学模型，对不同气体流量等条件下的特性进行了研究和探讨。

In chapter one, a review for the trade of urban rail traffic is performed with respects to the developing histories and trend, mode, light rails, vehicle type and so on; In chapter two, a set of contradistinctive analyses between the domestic and the overseas are carried out at aspects of equipment, density of line net, build cost and so on. In chapter three, the competitive status among existing enterprises for urban rail vehicle and equipment manufacturing in our country is analyzed by Potter model; In chapter four, questions that should be paid attention to and strategies in course of our country's urban rail traffic building are provided mainly in terms of plan, cost, construction investment and operation, selection of system type, safety of building process and so on.

本文第一章主要从轨道交通的发展历史、模式、轻轨、车辆类型、发展趋势等方面对城市轨道交通行业的发展作了一个回顾；第二章主要是从设备、线网密度、建设成本等六个方面对国内外城市轨道交通进行了一个对比分析；第三章主要是利用波特模型对我国现有的城市轨道交通车辆设备生产企业之间的竞争状况进行了分析；第四章主要从规划、成本、建设投资和运营、系统类型选择、建设过程安全等方面提出了我国在城市轨道交通建设过程中应该注意的问题和对策。

Finally we create our controller, and set it's control and model.

最后，我们创造我们的控制器，并把它设置的控制和模型。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。