优缺点

Objective:To compare the efficacy of transperitoneal and retroperitoneal laparoscopic radical nephrectomy for renal tumor.

目的：比较经腹腔和腹膜后方式行腹腔镜肾癌根治术的优缺点。

While discussing bonding essence of molecules of noble gas and some properties of compound molecules, this paper points out their advantages and disadvanteges and how to apply different theories to solve various knotty problems in teaching.

讨论了稀有气体化合物分子的成键本质以及某些性质，指出它们各自的优缺点和如何应用不同的理论去解决教学中不同的疑题。

Parallel to the nomographic method, the numeri- cal calculating method is also put forward here. As an example, the lead and aluminium rings are pressed with oil lubrication or with- out. The results of data processing by nomogram and the numerical calculating are compared.

在线图法处理实验数据的基础上，提出了理论计算法，并对铅、铝两种材料在有无润滑剂条件下进行了圆环压缩试验，比较了用线图法和理论计算法对实验数据的处理结果，指出了各种方法的优缺点。

Comparison experiments with corresponding random primer pairs are conducted to identify the nonobjective products.

实验中设置相应随机引物的RAPD对照，识别非目的扩增产物。文中介绍了新方法的原理，分析了这种方法的优缺点。

It undertakes: the study of the unique and relative strengths and weaknesses of both pictorial and nonrepresentational messages which may be employed in the learning process for any reason; and the structuring and systematizing of messages by men and instruments in an educational environment.

包括：研究在有目的的学习过程中可以使用的图像信息和非表征性信息的独特的和相对的优缺点；（2）在教育环境中，利用人员和设备将信息结构化、系统化。

It undertakes : the study of the unique and relative strengths and weaknesses of both pictorial and nonrepresentational messages which may be employed in the learning process for any reason; andthe structuring and systematizing of messages by men and instruments in an educational systems.

包括：(1)研究在有目的的学习过程中可以使用的图像信息和非表征性信息的独特的和相对的优缺点；(2)在教育环境中，利用人员和设备将信息结构化、系统化。

It undertakesthe study of the unique and relative strengths and weaknesses of both pictorial and nonrepresentational messages which may be employed in the learning process for any reason; and the structuring and systematizing of messages by men and instruments in an educational environment.

视听传播是教育理论与实践的一个分支，它主要研究对控制学习过程的信息进行设计和使用，包括：（1）研究在有目的的学习过程中可以使用的图像信息和非表征性信息的独特的相对的优缺点；（2）在教育环境中利用人员和设备将信息结构化、系统化。

The interpolate algorithms of three-order NURBS curve and double three-orders NURBS surface are presented. The expressions of partial derivative and normal curvature of NURBS surface are derived by the theory of differential geometry. The geometric characteristics of different curvature area of the free-form surfaces are analyzed in detail. All these work lays a theoretical foundation for constructing the cutter location calculating model of free-form surfaces NC machining. 2 On the basis of analyzing the methods of cutter path generation, the standard of evaluating the various methods of cutter path generation is presented. The method of generating cutter path with constant scallop height is presented for the first time.

本文以提高复杂曲面多坐标数控加工精度和加工效率为目的，在对国内外研究现状进行深入分析的基础上，对数控编程中各环节的关键技术问题进行了深入研究，主要内容包括以下几方面： 1 分析了复杂曲面各种造型方法的优缺点，给出了根据各种边界条件所确定自由曲面的NURBS表示方法以及三次NURBS曲线曲面反算算法；用微分几何理论推导了NURBS曲面的偏导矢及法曲率计算表达式；对曲面不同曲率特性区域的几何特征进行了深入分析，为建立复杂曲面的数控加工刀位计算模型奠定了理论基础。

Subsequently, simulations of normal Kalman filtering, extension Kalman filtering and self-filtering discussed in the paper are done in every different system. The working fields of each filtering and comparisons of their advantages and disadvantages is made in the paper.

并且在不同系统中对常规Kalman滤波、扩展Kalman滤波和文中讨论的自适应滤波进行仿真，通过比较分析，对比了它们的优缺点以及适用的范围。

The concept and characteristics of single nucleotide polymorphism of human genome is introduced.

对单核苷酸多态性的概念及特性作了简要说明，介绍了14种检测SNP的方法，讨论了各种方法的原理及优缺点

With Death guitarist Schuldiner adopting vocal duties, the band made a major impact on the scene.

随着死亡的吉他手Schuldiner接受主唱的职务，乐队在现实中树立了重要的影响。

But he could still end up breakfasting on Swiss-government issue muesli because all six are accused of nicking around 45 million pounds they should have paid to FIFA.

不过他最后仍有可能沦为瑞士政府&议事餐桌&上的一道早餐，因为这所有六个人都被指控把本应支付给国际足联的大约4500万英镑骗了个精光。