initial estimate
1.Abstract: The NR-BP methed was wsed for the si mulated calculation of cryogenic purifier distillation.The results of calculatio n showed that this method possessed the advantages of low initial estimate value s，rapid and steady convergence and so on, and were in good agreement with the d es ign values of referance.
2.The parameters of the Sacramento soil moisture model are classified as 5 categories based on the main overall effect that they can have on soil moisture state and runoff response, and the method of initial parameter estimate is described by hydrograph analysis and basin′s physical characteristics.
3.In this paper, a method for compensating the bias which results from the LS estimation of the model A(z-1)y(k) = B(z-1)u(k) + (z-1)e(k) is developed At the same time, simulation result shows that we can get a better result by using GLS technique with initial value which is the compensated estimate
4.Abstract: Creep analysis methods of high-rise buildings and large span buildings can only refer to creep coefficient method in bridge engineering or the method of degree of creep in hydraulic construction engineering under the present experiment conditions.In this paper,the incremental expressions of concrete creep and shrinkage strain when the initial computational age is not the same as the loading age are derived and corrected from the concept of concrete creep coefficient and the mean value theorem of integral and the principle of superposition.The differences of efficiency and accuracy of creep analysis between the finite element method with creep coefficient and the initial stress method with degree of creep are presented.This paper suggests that engineers should use the initial stress method with degree of creep to estimate the influences of creep on high-rise buildings and large span buildings on the basis of conceptual design.
5.In this paper we study the initial-boundary value problem for some nonlinear wave equation with strong dissipative term, and we obtain the exact decay estimate by estabilishing a difference inequality.
7.The paper studies the first initial-boundary value problem in a bounded domain in ~n for the mean curvature equation with a nonlinear convection term:u_t-div{σ(|Δu|~2)Δu}+b(u)·Δu=0.The existence of the weak solution is derived and the quenching phenomena and the L~∞-estimate to the solution are given.
8.By using Separate Source Method and Mine Statistic Method, the paper makes a comprehensive estimate about the gas emission, when light support top-coal caving technology is adopted in mining face during the initial phase in the third mining level, which is useful to direct the gas control and the safe production in the future.
9.A new scheme for accurate estimation of single tone jamming parameters in multi-carrier spread spectrum system is presented. Base on the results computed by DFT in demodulation and dispreading, the scheme can estimate accurately the parameters such as frequency, amplitude and initial phase of single tone jamming by analyzing two spectra lines having higher energy than others.
