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similarity parameter     
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  相似参数
     In this paper, starting from unified partial differential equation of describing some problems in viscous fluid mechanics, non-Newtonian fluid mechanics and visco-plasticity and so on, we have derived the existence conditions of similarity solution, the expression of similarity parameter and the equation of similarity solution by separation of variables. There- from, expression of similarity parameter and equation of similarity solution in some special conditions can be obtained.
     本文从描写某些粘性流体力学,非牛顿流体力学和非线性粘塑性力学等问题统一的偏微分方程出发,通过变量分离法,得到了存在相似性解的条件,相似参数和相似性解方程,由此可得到某些特殊情况下的相似参数和相似性解方程。
短句来源
     When the flow geometry for the river downstream of a hydroelectric power plant varies with a sufficient intensity and/or frequency, the energy loss related to the unit length of the flow of the river downstream is mainly due to the local energy. Considering the local energy loss of the flow, author has obtained the similarity parameter of the model.
     水电站尾水河道的水流几何形态变化得足够强烈或频繁时,尾水河道中水流单位 长度上的能量损失.主要是局部阻力损失.考虑水流局部能量损失,得到模型相似参 数。
短句来源
  相似性参数
     Toxicity unit(TU), additive index(AI), similarity parameter(λ) and mixture toxicity index(MTI) were used to evaluate the joint toxicity. The results show that the five binary mixtures showed all synergistic action.
     采用毒性单位(TU)、相加指数(AI)、相似性参数(λ)和混合毒性指数(MTI)进行联合毒性评价,结果表明,5种二元混合物的联合作用均为协同作用;
短句来源
     The model introduced a geometrical similarity parameter,which describes the influences of plant crown shape on leaf/branch angle distribution frequencies,fraction of shadowed or illuminated canopy and background,canopy reflectance,and finally scene reflectance.
     该模型引入一个几何相似性参数,用以描述植株冠层的几何形状对叶/枝角分布、阴影地面比例、冠层和地面各光学分量、冠层反射率和总反射率的影响。
短句来源
  相似参量
     The optimal similarity parameter ρ of ART-KNN was determined by its classification performance test,and the best mean classification accuracy rate was 94.4%.
     对ART-KNN网络的分类性能进行测试,确定了网络的最优相似参量ρ,得到最高平均分类正确率达94.4%。
短句来源
     It is an extension of different dimensional similarity and same dimensional similarity of two classes of linear control systems. A simple method is given which can be used to determine if two systems with different dimensions are similar or not. An algorithm of similarity parameter is given.
     描述了两类线性控制系统异维相似性的概念,这种相似性推广了两个系统间同维相似和异维相似概念,并给出了判断两类控制系统异维相似的比较简单的方法,及相似参量的算法.
短句来源
  相似系数
     Through an analysis of the monthly mean temperature series in recent 50 years in 160 stations in China, it is shown that the hierarchical symmetry exists in climate temperature fluctuations. We obtain an hierarchical similarity parameter β from 0.49- 0.77 in the different regions, which seems to be consistent with the climate character in those region.
     通过对全国160个站点近50年来的月平均气温距平序列的分析,发现层次相似律基本上都存在,得到的层次相似系数β具有一定的区域分布特征。
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  similarity parameter
A similarity parameter is shown to exist in all formulations regardless of the mean-flow selection.
      
The motion is characterised by a similarity parameter.
      
Using this approach, consideration is made of a general asymptotic expansion of the unified supersonic-hypersonic similarity parameter together with the stretched coordinate.
      
The value of the self-similarity parameter at large scales, namely the self-similarity parameter of the limit fractional Brownian motion, depends on the form the Poissonized Telecom process.
      
The data do not reject the hypothesis that the exponent θ of the power law is related to the similarity parameter H of fractional Brownian motion as follows: θ=-(1-H) for the interval (-T,T) and θ=-H(1-H) for (0,T).
      
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In order to extent the usage range of a cascade having excellent aerodynamic performance, it is beneficial to investigate the similarity between different flow fieldS. Von Karman gave transonic similarity law of two-dimensional isolated airfoils many years ago. However, the law of cascades is still different from that one of airfoils. This paper points out that, to guarantee similarity between two flow fields around cascades, it is necessary that five corresponding transonic similarity parameters...

In order to extent the usage range of a cascade having excellent aerodynamic performance, it is beneficial to investigate the similarity between different flow fieldS. Von Karman gave transonic similarity law of two-dimensional isolated airfoils many years ago. However, the law of cascades is still different from that one of airfoils. This paper points out that, to guarantee similarity between two flow fields around cascades, it is necessary that five corresponding transonic similarity parameters must be kept equal, respectively. Also some examples have been presented in this paper for demonstration. They indicate that the similarity law will help us to obtain rapidly many similar transonic flow fields around cascades at different operating conditions from a known flow field around a given cascade.

跨音叶栅绕流参数繁多,为了便于系统研究参数影响,也为了扩展某个气动性能良好的叶栅的使用范围,研究不同流场之间的相仿可能是有益的。多年前VonKarman曾给出了二维孤立翼型的跨音相仿律。然而,由于远前后方边界条件的不对称性,以及叶轮机械流场的周期性 所以叶栅的相仿律和孤立翼型的尚应有所不同。本文指出,为了维持两个叶栅流场的相仿,五个对应跨音相仿参数应分别相等。文中举例表明,相仿性有助于由一个巳知给定叶栅流场迅速得到很多在不同条件下运转的相仿跨音叶栅流场。

In the light of linear theory of blood flow in arteries, the dynamic similarity law of blood flow in arteries has been investigeted. First, we established the equivalent artery of complicated arterial system according to its main feature. Then We studied the principle which dynamically simulate the equivalent artery by enlarged elastic pipe in laboratory. On the basis of dimensionless formulation of linearized blood flow theory, three similarity parameters—dimensionless similarity constants...

In the light of linear theory of blood flow in arteries, the dynamic similarity law of blood flow in arteries has been investigeted. First, we established the equivalent artery of complicated arterial system according to its main feature. Then We studied the principle which dynamically simulate the equivalent artery by enlarged elastic pipe in laboratory. On the basis of dimensionless formulation of linearized blood flow theory, three similarity parameters—dimensionless similarity constants have been obtained. The relation between out put of simulated pump and heart, and the relation between terminal impedance of model pipe and of equivalent artery have been formulated.

本文按线化血流理论研究了人体动脉血流动态模拟的相似问题。首先,对复杂的动脉系按其主要特征建立当量动脉;而后,探讨了当量动脉以放大了的弹性管路进行实验室动态模拟的原理。以线化血流理论的无量纲提法为基础,能得到模拟试验的三个相似准则——无量纲相似常数。确定了模拟心泵输出与人体心输出间以及模型管的终端阻抗与当量动脉的终端阻抗之间必须依从的关系。

In this paper, different boundary layer equations of steady and unsteady two-dimensional imcompressible viscous flow in Cartesian coordinates, boundarylayer coordinates or rotationally symmetric boundary-layer coordinates are transformed into a general dimensionless ordinary differential equation. A series of similarity parameters and ordinary differential equations for various flow problems are provided. Finally, the physical property of each term in this equation is discussed.

本文将笛卡尔坐标系、边界层坐标系和旋转对称边界层坐标系中的二维不可压缩定常、非定常粘性流体的边界层流动问题用一个普遍的无因次常微分方程式表示,提出了各种流动问题的相似性参变量和相似性常微分方程式,并解析了此方程式的含义。

 
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