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Eckenwalder Lab, Department of Botany is primarily dedicated to research in woody plants including biosystematics, chemotaxonomy, numerical taxonomy and morphometrics, paleobotany, and cladistics, accommodation of hybridization in phylogenetic analysis, biogeography, systematics and reproductive biology of convolvulaceae.

植物学系Eckenwalder研究室主要致力于木本植物的研究，其研究领域包括生物分类学，化学分类学，数量分类学和形态测定，古植物学和遗传分类学，系统分析中杂交调节，生物地理学，滕本植物的分类学和生殖生物学等。

Based on the harmonic algorithm, the conductivity reconstruction method and the corresponding algorithm in oblique slice were proposed. Then the numerical simulation was performed by solving the Neumann boundary problem, Ohm's law and Biot-Savart law to obtain the magnetic flux density used to reconstruct the conductivity.

然后通过数值仿真来实现提出的算法，首先进行了正问题求解，即利用Neumann边界值问题、欧姆定律和毕奥－萨伐尔定律逐步计算出重建电导率分布的磁通密度的一个分量，接着进行了逆问题求解，即根据重建算法得到了横截面和斜位面内的相对电导率分布，并对仿真的结果进行了分析和讨论。

Based on the electromagnetic induction law, Biot-Savart law and the numerical integration arithmetic, the vector potential of the busbar was calculated and the electromotive force of the planar coil for the single phase and three-phase busbar current was deduced.

根据电磁感应定律和毕奥-萨伐尔定律，运用数值积分算法，求解出汇流排导体矢量磁位，并推导了测量单相和三相汇流排导体电流时直线型线圈的输出表达式。

With the air-gap current and the image current adopted and Biot-Savart's law based, a numerical method, which divides the natural end-winding segments of the coil into many micro-segments, is carried out to get end-winding inductances between two coils.

通过引入气隙电流和镜像电流，以Biot-Savart定律为基础，把线圈端部各大段分成若干小段，用数值方法计算两线圈间端部电感。

The model of the principal sates of polarization and the numerical model of the concatenation of birefringent fibers are introduced.

二、建立了理论模型分析了PMD对波分复用光纤通信系统的影响，提出了波分复用光纤通信系统中偏振模色散的补偿方案，分析了高阶偏振模色散对信号的影响。

The improved method was put forward. With the black oil model in Eclipse software, the method of multi-stages simulation and perpendicular bisector girding technique, the layer of 3rd in the second member of Shahejie formation in the second district of Shengtuo Oilfield with high water cut was investigated by reservoir numerical simulation.

传统的油藏数值模拟方法由于没有考虑高含水期油藏开发过程中储层岩石和流体参数的变化，常导致模拟结果的失真。

The general form of solution for the non symmetric matrix A is given, the expression of optimal approximation solution is presented, and an algorithm for solving the problem is described. The total least squares problem with symmetric and bisymmetry constraints is discussed respectively. A sufficient condition for existence of solution is derived by use of the theory of matrix Ricaati equation. The general form of solution is given if the problem has a solution, and the expression of optimal approximation solution is presented. Some numerical examples are given.

对矩阵A是非对称情形，给出了解的一般表达式，证明了最佳逼近问题解的存在唯一性，并给出了其解的表达式，描述了求解问题的算法；讨论了带对称和双对称约束的总体最小二乘问题，利用Ricaati矩阵方程的理论得到了解存在的一个充分条件，分别对对称矩阵和双对称矩阵两种情形，给出了解的一般表达式，证明了最佳逼近问题解的存在唯一性，给出了其解的表达式，提出了求解这些问题的算法，并给出了数值例子。

A numerical model for suspender ejection device with the powder gas of blank cartridge as driving energy is established.

建立采用抛放弹火药燃气作为工作能源的挂弹钩弹射机构的数值计算模型，对抛放弹燃烧，弹射活塞非对称工作，直至推离悬挂物的整个动态过程进行了模拟计算。

This paper focuses on the numerical simulation of the crack propagation process in stress blanking.

本文的主要目的在于对应力断料中裂纹扩展过程的数值模拟进行分析研究。

In the numerical simulation, the Blasius equation of boundary layer based on the Chebyshev interpolation points was solved by using of the Runge-Kutta method with variable step.

在数值模拟中，采用变步长的Runge-Kutta方法，求解基于Chebyshev插值点的边界层Blasius方程，然后对边界条件进行坐标变换，使Chebyshev谱方法适用于边界层稳定性方程的求解。

Recall that, in the Kolmogorov axiomatization, measurable sets are the sets which have a probability or, in other words, the sets corresponding to yes/no questions that have a probabilistic answer.

延期开工的Kolmogorov宣布要衡量所有套职能有限许多坐标限制在于衡量子寅。换句话说，如果是/否的问题回答f可看的价值观念在许多最有限坐标，然后它有一个概率的答案。

The experimental results showed that the algorithm can filter singular points and remain fixity of the target edge.

实验表明：基于模糊理论的图像智能滤波方法比常规图像滤波方法运算量小，它既能去除奇异点，又能保持图像中目标的边缘不变性，具有很好的滤波效果。