异步轧制对二次再结晶取向硅钢磁性能的影响

研究了异步轧制条件下不同厚度的二次再结晶取向硅钢成品的磁性能的变化,找到了硅钢磁性能与成品厚度和异步速比之间的关系.     

奥氏体不锈钢中稀土的作用研究及应用前景

就稀土在奥氏体不锈钢的应用研究作简要综合评述。作为稀土资源的大国,开发具有我国资源特色新型高品质稀土不锈钢,具有十分重要的战略意义和很好的应用前景。     

Spectral Method for Thermal Conductivity Calculations

We discuss several post-processing issues in molecular dynamics (MD) calculation of lattice thermal conductivity using the Green–Kubo formula. For crystals with high thermal conductivity such as SiC, converting the MD raw data on heat current fluctuations into thermal conductivity result is non-trivial. One can accelerate the process using Fast Fourier Transform and the spectral method. A few mathematical subtleties are cleared up. Due to finite data length, integration of the correlation function must be terminated before noise takes over; two termination criteria are proposed which give reasonable results for crystalline β-SiC. A simple solvable model that illustrates the above points and can be used for code-checking is presented.     

Analysis of a Gyroscope＇s Rotor Nonlinear Supported Magnetic Field Based on the B-Spline Wavelet-FEM

A supported framework of a gyroscope＇s rotor is designed and the B-Spline wavelet finite element model of nonlinear supported magnetic field is worked out. A new finite element space is studied in which the scaling function of the B-spline wavelet is considered as the shape function of a tetrahedton. The magnetic field is spited by an artificial absorbing body which used the condition of field radiating, so the solution is unique. The resolution is improved via the varying gradient of the B-spline function under the condition of unchanging gridding. So there are some advantages in dealing with the focus flux and a high varying gradient result from a nonlinear magnetic field. The result is more practical. Plots of flux and in the space is studied via simulating the supported system model. The results of the study are useful in the research of the supported magnetic system for the gyroscope rotor.     

Solutions of partial differential equations with random Dirichlet boundary conditions by multiquadric collocation method

Problems described by deterministic partial differential equations with random Dirichlet boundary conditions are considered. Formulation of the solution to such a problem by the global collocation method using multiquadrics is presented. The quality of the solution to a stochastic problem depends on both its expected value and its variance. It is proposed that the shape parameter of multiquadrics should be chosen to optimize both the accuracy and the variance of the solution. Test problems described by the Poisson, the Helmholtz, and the diffusion–convection equations with random Dirichlet boundary conditions are solved by the multiquadric collocation method. It is found that there is a trade-off between solution accuracy and solution variance for each problem.     

多群中子散射角分布L阶截断出负的改进

蒙特卡罗方法或离散纵标法模拟多群中子输运方程，散射角分布通常按Legendre级数展开，取L阶截断近似。当L较小时，近似角分布在[-1，1]定义域的多处出负，面积不归一，进而导致非物理解。文章针对这一问题，利用矩和Legendre系数等价关系，给出离散广义Gauss求积组，并用该求积组作节点构造等概率阶梯函数，逼近实际角分布，从而消除非物理解。计算取得了与实验和连续截面蒙特卡罗MCNP程序一致的结果。     

工业热电偶、热电阻自动检定装置

将传统的手动热电偶、热电阻检定装置改进为自动检定装置，实现了自动连续检定。     

两种标准信号之间的函数变换

用函数变换的方法解决两种标准信号之间的转换，进而阐述了数学在解决实际问题中的应用。     

Prosody Evaluation as a Diagnostic Process: Subjective vs. Objective Measurements

A set of perception experiments, using reiterant and lexicalised speech, was designed to perform a diagnostic of the relative implication of prosody in the segmentation and hierarchisation of speech. Both natural and synthetic intonation were evaluated. Then, two distance measures—correlation and root-mean-square distance on the acoustic parameters (F0, syllabic duration and intensity)—were applied to match the perception results. This objective vs. subjective comparison underlines which acoustic cues are used by listeners to judge the adequacy of prosody in performing a given function such as demarcation. Results can be summarized by a scale of the perceptual distance between two demarcation functions. This study also points out the ability of listeners to retrieve pertinent information on the basis of pure prosodic stimuli.     

测控系统中软件抗干扰方法的应用

介绍了测控系统中，根据各点采样数据似合出线性函数并过滤采样数据的干扰以提高系统可靠性。