According to the relation of power spectrum density(PSD)and track random irregularity,a method of numerical simulation of track irrrgularities based on Blackman-Tukey was put forward.

Results: (1)the relation of power function between different density NBCA1 99944 187Dand the fresh areterial blood In Vitro: T 慶) =e (2)the arteriovenouscirculation time is negative correlation with Spetzler grade ,and almostregarded as the coagulation time of the fresh arterial blood in Vitro.

Probed into relation of power and efficiency of two centrifugal fans series and single fan, and found speed of fan is fixed in second sequence have more effect to power and efficiency of series.

For different distribution relation of power in different public sector there are various problems of moral risk of trustor and agent in various power structure.

Origins of Western attitudes toward sex roles, female sexuality, relation of power to gender.

This paper is divided into three parts. (1)The method of M.D.Haskind is used to calculate the added masses and damping due to the oscillations of a floating elliptic cylinder of very small frequency parameter v,as well as the excition of incoming waves on the motion.By using the Joukowski transformation to transform the physical plane into a complex plane,the elliptic section becomes a circular section.Moreover,an auxilliary function f (df)/(dx)=(dw)/(dx)+ivw is introduced,where w is a complex potential.B yexpanding...

This paper is divided into three parts. (1)The method of M.D.Haskind is used to calculate the added masses and damping due to the oscillations of a floating elliptic cylinder of very small frequency parameter v,as well as the excition of incoming waves on the motion.By using the Joukowski transformation to transform the physical plane into a complex plane,the elliptic section becomes a circular section.Moreover,an auxilliary function f (df)/(dx)=(dw)/(dx)+ivw is introduced,where w is a complex potential.B yexpanding into a power series.The determination of f results in the solving of two infinite systems of linear algebraic equations,with each system having a unique solution when v is very small.Then the complex potential and the series expression of radia- tion characteristics are obtained by solving an ordinary differential equation in considering the condi- tion of radiation. An expression of hydrodynamic force is obtained by integrating the pressure,and its result involves the coefficients in the series expansion of f only. (2)Expand f in a power series of v,and solve the partial differential equation satisfied by the terms of this series on the boundary of the body by making use of the relation of power series and trigonometric series.Thus,the series solution of f is obtained.Here we present its first two terms only.Finally,this result is compared with that of part (1),and approximate formulas of the coefficients of added masses and damping are obtained. (3)The result of part(2)and a strip theory are used to ealculate the added masses of a long elli- psoid.Some numerical results are also obtained.

本文分三部分。第一部分研究椭圆柱在频率参数 v 很小的情形下的阻尼及附加质量的计算,以及入射波扰动的影响,其中利用了哈斯金德提供的方法。利用茄可夫斯基变换,将物理平面变到另一复平面上,椭圆拄周线化为圆柱周线;又引入辅助函数 f:(df)/(dx)=(dw)/(dx)+ivw,其中w 为复势。先将 f 展为幂级数,利用三角级数的正交性,由边界条件确定 f,结果归结为解二组无穷线性方程组,我们证明了这些方程组在v 很小时有唯一解。确定 f 之后,由求解常微分方程,并考虑辐射条件,得到复势 w (x)及辐射特性的级数表示式。由压强积分得到水动力表示式,结果只与厂的级数展开式系数有关。第二部分,将 f 展为参数 v 的幂级数,利用幂级数与三角级数的关系,解这个级数各项在物体边界上满足的偏微分方程,得到 f 的级数解,这里我们仅求出它的前二项;最后与第一部分结果比较,得到附加质量系数、阻尼系数等的近似公式。第三部分,是利用第二部分的结果,用切片理论计算长椭球的附加质量,同时给出数字结果。

In This paper dynamic equations for turbine shaft engine gas generator and free turbino are obtained by derivation from a detail mathematic model in which an energy transformation is assumed to take place when an air (or gas) flow passes through all the components of the turbine shaft engine. And from the relation of power transfer, dynamic equations are derived for the relation between the free tnrbine and the load with a flexible shaft. In terms of the equations derived, an analysis is made for...

In This paper dynamic equations for turbine shaft engine gas generator and free turbino are obtained by derivation from a detail mathematic model in which an energy transformation is assumed to take place when an air (or gas) flow passes through all the components of the turbine shaft engine. And from the relation of power transfer, dynamic equations are derived for the relation between the free tnrbine and the load with a flexible shaft. In terms of the equations derived, an analysis is made for the dynamic performance of x x x , and characteristic curves and amplitude-phase frequency characteristic curves are plotted for the engine with step input.

By solving the coupled power equations of two-mode waveguide, the relations of power attenuation and conversion properties of guided modes to input and output powers from the optical waveguide have been derived. In the glass waveguide formed by ion exchange, holographic grating and glass prism were used as input and output couplers respectively, input and output powers from the optical waveguide were measured, and the power attenuation and conversion coefficients of guided modes have been determined....

By solving the coupled power equations of two-mode waveguide, the relations of power attenuation and conversion properties of guided modes to input and output powers from the optical waveguide have been derived. In the glass waveguide formed by ion exchange, holographic grating and glass prism were used as input and output couplers respectively, input and output powers from the optical waveguide were measured, and the power attenuation and conversion coefficients of guided modes have been determined. Experiments show that this measurement method is simple, effective and specifically applicable to the measurements of short waveguide samples.