反逆的

In this paper, an iterative approach to potential field continuation from curved surface to plane is proposed. The continuation of potential field data from a curved surface to a plane can be viewed as an inverse problem of upward continuation of plane potential field data, getting a linear integral equation. Through viewing the potential field data on the curved surface as the data on the average elevation plane of the curved surface, then using the wavenumber domain generalized inverse algorithm to downward continue the data from the average elevation plane to a given plane, and a topography correction based on the change of curved surface relative to its average elevation is implemented to the downward continued data on the given plane, finally the downward continued data plane is upward continued to the curved surface.

本文提出一种位场数据曲化平的迭代方法，即通过把位场数据曲化平视为平面位场数据向上延拓的反问题，得到曲化平的线性积分方程，再把曲面上位场数据视为曲面平均高程面上的位场数据，利用向下延拓的波数域广义逆算法把平均高程面上的位场数据向下延拓到设定平面上，再根据曲面和其平均高程面的相对起伏对设定平面上的向下延拓数据进行起伏校正，最后再把所得平面上的位场数据向上延拓得到曲面上的位场数据，并进行迭代。

The coincidence of the reverse course of poly-element content from lower to higher level and the pathological reverse change of bone from osteomalacia to osteopetrosis.

本实验多元素含量由低向高变化的逆反过程与骨软化向硬化的病理转换相吻合；铝和氟彼此可影响对方的体内过程和在骨骼中的蓄积并引起多元素含量和相关性的显著变化。

The algorithm can be served as the inverse operation of raster to 2DRE quadtree, but it is not direct inversion, instead, it takes other simpler measur i.e. intersection of 2DRE quadtree and code transforming method in Raster to Quadtree conversion, to make the algorithm more effective. It can also avoid possible trouble of memory overflow caused by the operation on bigger images in smaller memory.

这一算法可看作栅格—2DRE四叉树变换算法的逆变换，但不是它的"反演"，而是采用了较为简洁的求交集运算以及栅格—2DRE四叉树变换算法中的编码转换方法，使得这一算法的实现更加有效，且避免了在图像较大而内存较小的情况下可能发生的"溢出"等矛盾。

With a representation of the rotation group induced by the anti-commutative, self-inverse matrices the transformations named by Foldy-Wouthuysen, Cini-Taschek,Chakrabarti and the others are treated from a unified viewpoint. A new transforma-tion is found. Some applications of this method in the eigenvalue problems are demon-strated.

我们找出了由反易自逆矩阵荷载的转动群表示，统一地推广处理了Foldy-Wouthuysen，Cini-Tauschek，Chakrabarti等提出的各种变换；建立了一个几何图像，借助于它可以很容易地找到所要求的交换；举例说明了这方法在本征值问题中的应用。

A new analytic scheme for solving the inverse kinematics equations of CRS robot manipulator was presented by the shift of the joint coordinates and the rotation coordinate system, which were significant to optimize the robot motion and path planning, and the formulas of calculating the sine and cosine of each rotate angle variable were solved.

通过关节坐标的转换和旋转坐标系统的引入，给出了CRS机械手逆运动方程求解的一种新解析法，直接推导出各个关节转角变量的反三角公式，为机械手的运动优化和轨迹规划创造了条件。

Emphasis analyzed,researched and estimated pinacol rearrangement actions,catalysts,reaction machine,related some reaction formulae etc,and characteristic,regulation relative with migration groups and more uses.

重点分析、研究和评述了频呐醇重排的作用、所用的催化剂、反应机理、相关的一些反应式、与迁移基团相关的重排特征和规律以及其较多的应用等，也论及了反频呐醇重排反应恰好是频呐醇重排的逆过程。

The mode of courtyard eco-agriculture suits for little scale production conducted by single family. With the traits of autarky and reversing the history tide to counter collaboration of courtyard eco-agriculture, the ecological and economical benefit is very low, which contuses farmer's enthusiasm to conduct eco-agriculture and blocks the sustainable development of eco-agriculture.

庭院式生态农业模式适应我国一家一户的小规模生产，但由于其逆历史潮流反分工和自给性特征，使得生态农业的生态效益和经济效益都十分低下，严重挫伤了农户发展生态农业的积极性，并影响了生态农业发展的可持续性。

Research on islanding related problems has been conducted for over twenty years,but most of them have focused on anti-islanding protection and test of grid connected inverter system.

对孤岛效应的研究已经进行了二十余年，但大多数都是针对并网逆变器系统的反孤岛保护和测试展开，而没有对分布式发电系统的孤岛效应进行全面而系统的研究。

The results simulated with MATLAB demonstrate that the proposed mathematical model and connecting rod parameters are reasonable,all joint motions are correct and cotton-picking is realized.Based on the kinematics research of the single manipulator,the path planning and aiming to avoid obstacle will be investigated.

根据D-H法则和机械手的结构参数，建立了单机械手的运动学模型，采用反变换法求解运动学逆问题，利用MATLAB仿真，验证了所建模型和所有连杆参数的正确性，保证了机械手各关节的准确运动，实现了棉花的实时、高效采摘，并且可以在上述机械手运动学模型基础上开展轨迹规划和避障等技术研究。

Nonmoral and immoral Education in Ethics easily blurs the connotation and denotation of moralism,which can initiate students' psychol...

非道德&和&不道德的道德教育容易模糊德育的内涵和外延，引发学生的逆反、戒备和敌视心理，不利于学校德育的有效开展。

Do you know, i need you to come back

你知道吗，我需要你回来

Yang yinshu、Wang xiangsheng、Li decang,The first discovery of haemaphysalis conicinna.

1〕 杨银书，王祥生，李德昌。安徽省首次发现嗜群血蜱。