流

In this paper, a total flow differential model of sediment density current was developped on the basis of analysizing its characteristics and simplifying its moving properties.

本文分析了异重流体的特点，对异重流的运动作了一些假设和简化，推导出了以总流为控制体的异重流微分模型。

When coverage varying from high to low, the parameter a decreasing, and b increasing. The fitted regression equation between total vegetation coverage and runoff duration as following, C = 3.4881nt_p -11.772 (R~2=0.9477). The equation shows that the vegetation is positive correlation to duration, i.e.

高寒草甸产流、产沙的试验结果表明，不同植被盖度的嵩草草甸其产流、产沙过程可以用幂函数R=at~b分布来描述，随着盖度由大变小，方程参数a值逐渐变小，b值逐渐增大；而覆盖度在5％以下的黑土滩，其产流、产沙过程更符合指数函数R=ae~分布。

Basing on the exploring of the functions of cohesion force and friction force during rheology course and the assumptin that viscosity lost according viscosic strain, a constitutive model for viscous, elastic and plastic rock is set up,which can simulate the third course of creep.Then the impact of transcient damage to rheology is discussed and corresponding creep model for rock is proposed.

在探导岩石颗粒间粘聚力和颗粒间摩擦力在岩石发生流变过程中的作用基础上假设粘性失效按流变应变统计概率分布，建立了岩石粘弹塑性本构关系，能够描述岩石蠕变加速阶段特征；讨论了瞬时损伤对岩石流变的影响和相应的损伤蠕变模型建模问题。

Based on this,temporal logic formula is used to express the properties that the data flow must satisfy,before the verification,an algorithm transforming the UML Statecharts model into reachable state transition graph is given,finally the correctness of the data flow is verified by model checking technique.

在此基础上，使用时序逻辑公式表示数据流所需满足的性质，在验证数据流的正确性之前，给出了将它的UML Statechart图模型转化为可达状态迁移图的算法，最后通过模型检测算法验证数据流的正确性。

Results Cardiac functions recover to grade Ⅰ in 25 cases,grade Ⅱ in 6 cases,postoperative low-grade reflux of mitral valve in 12 cases,low-grade reflux of tricuspid ...

结果25病人心功能恢复到I级，6例II级。12例病人术后二尖瓣轻度返流，4例三尖瓣轻度返流，1例二尖瓣中重度返流。

By analyzing the key generation equations of Trivium and determining 52 bit of its interior state which need to be altered, and then fault injections are used to alter these 52 bit and a faulty key stream can be obtained.

通过分析Trivium密钥流生成方程，确定需要改变Trivium 288 bit内部状态中的52 bit，使用错误注入改变所确定的52 bit，并生成密钥流，与原始密钥流进行差分。

The numerical experiment reconstructed fairly successfully the circulation patterns of the Kuroshio, the Taiwan Warm Current, the Tsushima Warm Current and coast currents.

各因素共同作用下的黄海东海总流场数值模拟中，模式较好的再现了黑潮、台湾暖流、对马暖流、黄海暖流和沿岸流等各环流流系。

Some mod-el available of this kind,generally,are assumed that the microburst im-pings on the ground vertically and the turbulence is unconsidered.

该模型可模拟以任意方向倾泻的微暴流，其暴核离地高度、暴核直径、暴流强度、暴流倾泻方向、距机场位置等皆为可调参数，使用灵活方便。

Numerical simulations were done for a bistable latch valve of the system by FLUENT, and three groups of datum for different fluids were obtained with the same effective exit sectional area. Besides, a static mathematic model for the electromagnetic valve was established based on the obtained datum. Secondly, the motion of the valve spool was realized by UDF file in FLUENT. Three kinds of motions, uniform, acceleration and motion driven by the coupling effect of the liquid resistance and the electromagnetic force, were calculated and compared. The dynamic characteristic of the electromagnetic valve was obtained by analyzing the relationship of the mass flow rate of the inside flow field of the electromagnetic valve, the change of the drop pressure of the passageway of the valve, and motion time.

并针对系统中的某双稳态电磁阀，使用商用CFD软件FLUENT对其进行内部流场的数值模拟，通过使用不同流体介质，不改变阀门有效出口截面积的情况下，分析得到的三组数据，建立了该电磁阀的静态数学模型；通过编写UDF文件，实现对阀芯运动方程的控制，在阀门做由闭合到开启、开启到闭合运动时，控制阀芯分别做匀速运动、匀加速运动以及阀芯受到液体阻力与电磁力作用力的耦合力的运动，分析了三种工况下电磁阀内部流场质量流率和阀门出口入口压降的变化以及运动时间，从而得到该电磁阀的动态特性。

Simulation of the motion of a solid particle in a vertical in-tube liquid upflow.

利用计算机对单个颗粒在竖直向上层流、紊流、及蒸汽产生条件下的竖直向上管流流场中的运动规律进行了分析计算。

It has been put forward that there exists single Ball point and double Ball points on the symmetrical connecting-rod curves of equilateral mechanisms.

从鲍尔点的形成原理出发，分析对称连杆曲线上鲍尔点的产生条件，提出等边机构的对称连杆曲线上有单鲍尔点和双鲍尔点。

The factory affiliated to the Group primarily manufactures multiple-purpose pincers, baking kits, knives, scissors, kitchenware, gardening tools and beauty care kits as well as other hardware tools, the annual production value of which reaches US$ 30 million dollars.

集团所属工厂主要生产多用钳、烤具、刀具、剪刀、厨具、花园工具、美容套等五金产品，年生产总值3000万美元，产品价廉物美、选料上乘、质量保证，深受国内外客户的青睐