消偏光纤陀螺的理论和实验研究

本文首次在理论上导出消偏型光纤陀螺的零漂和标度因子表达式,并得出以下两个结论:1)在使用约 40 dB偏振器时,导致陀螺漂移的主要因素是强度误差而并不是振幅误差;2)由光学标度因子与各种器件参量关系表明开环解调时陀螺的线性误差较大.试验样机证明了以上结果,并找出减小漂移的方法.     

重复测量次数的讨论

本从三个观点出发,综合讨论了重复测量的次数。     

速度一压力的双线性一常数有限元

本文把内部罚函数方法应用于Stokes问题,讨论了低阶实用的双线性、常数有限元,得到误差在H'模和L'模的最优阶收敛.     

SOLUTIONS OF MAGNETOHYDRODYNAMICS EQUATIONS-THE THEORY OF FUNCTIONS OF A COMPLEX VARIABLE UNDER DIRAC-PAULI REPRESENTATION AND ITS APPLICATION IN FLUID DYNAMICS (Ⅳ)

This work is the continuation of the discussion of Refs.[1 3].(A) We turn the Magnetohydrodynamics equaitons of isentropic compresible andnon-dissipative magneto-flow into the form of the ideal hydrodynamics equations in thispaper;we can obtain the general Chaplygin equation from Ref.[3],and the generalsduction of this equation.(B)We apply the theory of functions of a complex rariable under Dirac-paulirepresentation,turn the general Magnetohydrodyamics equations of incompressiblemageto-flow into two nonlinear equaitons for flow function and"magneto-flow function",and obtain the exact stable solution of incompressible magnetohydrodynamics equationsunder the condition of stable magnetic field(i.e.under conditon of equality for kinematicalviscid coefficient or viscid diffusion coefficient with magnetic diffusion coefficient).     

Solution of spline function of elastic plates

In this paper.from four and three-order differential equations defined by cubic andquadratic splines of generaized beam.The beam functions with many boundary conditionsand under various loads are reduced.The approximate solution of deformation surface andstress of elastic thin plate is very accurate.     

Solution of bending of cantilever rectangular plates under uniform surface-load by the method of two-direction trigonometric series

The bending of a cantilever rectangular plate is a very complicated problem in thetheory of plates.For a long time,there have been only approximate solutions for thisproblem by energy methods and numerical methods.since 1979,Prof.F.V.Chang of Tsing Hua University obtained,by the method ofsuperposition,a series of analytic solutions for cantilever rectangular plates under uniformload and concentrated load.In this paper,the two-direction trigonometric series is used to obtain the solution forthe bending of cantilever rectangular plates under uniform load.The obtained results arecompared with the results by the method of superposition.The comparison shows that theresults of these two methods are in good agreement,hence they are mutually confirmed to becorrect.     

时变信道序列检测的概率收敛定理和检测截止所引起的误码增皿

时变信道中的信号色散现象是使数字通信系统性能显著下降的主要因素,特别是多径展宽(即所谓的符号间干扰)的增大将强烈地限制通信速率的提高.因此,对信道色散的测量和寻求各种改善数字通信质量的途径的研究,历来为通信系统的设计者所关注,一直没有中断.为了寻找克服多径效应对数字通信影响的新的途径,文献[1]、[2]依据多径传输和时间分集接收技术之间的相似特性,对广大平稳随机时变信道上使用最大似然序列检测技术的问题进行了研究,得到了若干很有意义的结果;并提出了“在采用序列检测技术后,符号间的干扰越严重,其抗衰落的性能反而越好,当符号间干扰无限严重时,时变信道将被改造成恒参信道”这个在逐比特检测情况下认为是不可思议的结论.     

An approximate solution considering flow inertia between spherical surfaces

In this paper, the analytical expressions of the pressure distribution, velocity distribution and discharge of the flow between spherical surfaces are found by using the method of iterative approximate solution when the inertia terms of Navier-Stokes equations in spherical coordinates are taken into consideration. Furthermore, using these expressions, we can directly obtain the corresponding analytical expressions of the laminar radial flow between parallel disks, which are fully identical with corresponding results presented by refs. [3,4].     

Real Time Correction and Evaluation of Nonlinear Errors in Single Frequency Interferometers

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调强连续波激光测距系统中的电子交调干扰

在调强连续波激光测距系统中,调制激光器的高频电流源产生的泄漏干扰是影响测距精度的主要因素。本文对此泄漏干扰进行了系统研究,分析了干扰产生的原因,干扰与测距精度的关系,给出了干扰误差的计算公式以及补偿方法。