数值方法

A wavelet de-noising method is introduced,and feasibility of the method is verified by numerical calculation.

介绍了小波去噪方法，并通过数值计算验证了方法的可行性。

Used traditional measurement equipment and a new method-optimal approximation between measured and numerical calculation values, the coefficient of thermal conductivity of cornea was measured. It can be expressed by the equation of λ=0.10395+2. 75156×10〓t.

本文在不改变现有传统测定设备的前提下，采用一种新方法—通过数值计算角膜表面温度变化规律与实测值之间的最佳逼近，确定物体变物性导热系数的参数估算方法，对角膜的导热系数进行了测定，在角膜冻干的温度区间内，角膜的导热系数可近似地表示为λ=0.10395+2.75156×〓。

From the point of view of numerical computation, TSVD regularization method is an effective method.

从数值实现角度看，TSVD正则化方法是求解不适定问题的十分有效的方法。

The results obtained from three different methods—the conventional numerical differentiation, the discrete wavelet transform method and the proposed continuous wavelet transform method were compared, it was demonstrated that the results are similar for signals without noise, but the signal-to-noise ratio of the result obtained by the CWT method is improved greatly comparing with the former two methods for noisy signals.

通过数值微分法、离散小波变换法及连续小波变换法对模拟信号的求导结果表明：对于无噪音的信号，三种方法的结果相似，而对于含有噪音的信号，连续小波变换法所得结果的信噪比明显高于前两种方法。

The depletion potential of charged colloidal system is studied by the Monte Carlo method through the Acceptance Ratio method, and the depletion force can then be calculated by numerical differentiation of the depletion potential .

用MonteCarlo方法模拟了带电胶球系统，采用接受率方法获得该体系的耗尽势，再对耗尽势取数值微分得到耗尽力，通过对耗尽力与库仑力的对比分析，初步建立起在两带电大胶球比较靠近范围内耗尽力仍起明显作用的带电胶球模型。

This paper focuses on a development of a sensor system measuring heading of a vehicle or plane. The theory of the solid-state magnetic sensor is presented. It also will include the numerical calculation and error compensation.

依据所实现的一种测量航向角的新方法，论述磁阻传感器的原理，给出了系统数值计算方法，分析了系统误差并进行校正。

In order to describe the random-like feature of chaotic signal, the statistical analysis method for discrete time chaos system is studied. A domain iterative algorithm for numerical estimation of the invariant probability distribution is presented, which is the foundation for the statistical analysis and processing of chaotic signal.

针对混沌系统的随机性特征，本文研究了离散时间混沌系统的统计分析方法，并给出了一种基于Frobenius-Perron算子的区间迭代算法用于混沌映射不变分布的数值求解，该方法在样本数较少时，仍可以获得不变分布的良好估计，为混沌信号进一步的统计分析和处理奠定了基础。

Quality function deployment and some methods of fuzzy mathematics and numerical analysis are mostly employed to explore and research key techniques on product level reuse. Some new concepts and models and algorithms are established.

主要采用质量功能配置、模糊数学和数值分析中的一些方法探索和研究了产品级再使用的关键技术，创立了一些新的概念、研究方法和技术路线。

The Winklhofer method is an exact method.But Winklhofer method cannot calculate centerdistance of a roller chain drive whose length of chain is an odd number of chain pitches.Involute function method is anapproximative method.

W ink lhofer方法是准确的计算方法，但只能用于链条总长是链节的偶数倍时的链传动，而渐开线法是近似法，不能精确地计算链传动中心距；而二分法是一种数值法，它可精确地计算链传动中心距，并且适用于链条总长是任意值的链传动，可计算出链传动中心距最大值和最小值。

Three different numerical iterative algorithms are developed and the accuracy and stabilities of them are compared. Tension and compression instabilities are studied and effects of Conservative Smoothing Approach and artificial viscosity on stabilities are discussed. Based on Taylor series expansion, Modified SPH method is proposed. The discrete forms of the function and its first derivative estimations of the kernel function are deduced in both one and two dimensional space.

讨论了三种不同的数值迭代算法对计算精度和稳定性的影响；分析了不稳定性产生的根源，包括拉伸不稳定和压缩不稳定，探讨了保守光滑算法和人为粘性对稳定性的影响；在Taylor展开的基础上提出了一种修正的SPH方法，并推导一维和二维情形下函数的核估计和函数的一阶导数核估计的离散形式，结果表明，二维情形下MSPH方法可以很好的改善边界粒子的计算精度。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。