查询词典 mapping function

In this dissertation, incorporating the level set algorithm, the gradient projection method, the nonlinear mapping technique, the return mapping algorithm and the mean curvature flow technique into topological optimization theory, a level set algorithm for topology optimization with multi-material structures is put forward, which can optimize a problem with general objective functions, multi-constraints, multi-materials and multi-load cases.

同时，又将拓扑导数理论和水平集算法结合起来，提出了结构拓扑优化的拓扑导数与水平集算法，进一步提高了计算效率。

The paper puts forth that the numerical model of actual forming part is reconstructed by RE and the surface is regarded as actual trimmed surface, then grids and nodes mapping relationship between design model and actual forming part is acquired through compelling deformation simulation, and the design trimming line is dispersed into points according to a certain precision and the projective points and the coordinate values of the intersection points of projective line on the grids formed by discrete points are calculated along trimming direction, the new coordinate values of projective points and intersection points of projective line after deformation are calculated based on the mapping relationship of grids and nodes, the deformed trimming line can be acquired through fitting the points into curve.

本文提出通过逆向工程技术重构出实际冲压件的型面并以此型面为修边后实际冲压件的型面，然后采用强制变形仿真的方法建立设计模型和实际冲压件重构模型的网格和节点映射关系。将设计修边线按一定精度离散成点，然后根据修边方向计算出各点在网格上形成的投影点和投影线交点，根据之前计算出来的网格和节点映射关系就可以计算出投影点和投影线交点在变形后的新坐标，将其拟合成曲线就可以得到变形后修边线的形状。

This paper presents the two conditions:Sufficient condition and necessary condition for the links of perspective mapping and projective mapping.

本文给出了射影映射为透视映射的两个充要条件，这两个充要条件与射影变换为对合的充要条件是一致的。

At first, the principle of algebraic quadratic congruence mapping is analysed, and then limitation of odd-even protection and shift computation are added to the mapping of interleaver.

首先分析算术二次同余映射的原理，然后在此基础上对交织器的映射关系加以保奇偶序限制和移位运算，从而得到两个改进型的算术映射交织算法。

Firstly,The paper defines a fibrewise quotient mapping between different fibrewise topology spaces ,at the same time it researches the generations of the fibrewise quotient topology space that called the fibrewise gluing mapping and the fibrewise gluing topology space.

其一是，本文不仅定义了不同底的纤维拓扑空间之间的纤维商映射，同时也研究了纤维商空间的生成，文中分别称其为纤维粘合映射和纤维粘合拓扑空间。

September 6 to October 16 of the comprehensive survey, the research team took 41 days, more than 7300 km trip, the use of global satellite positioning systems, geographic information systems, remote sensing and other modern high-tech mapping of Sanjiangyuan the 19 regions visited the source and synthesis of observation, was the surveying and mapping, meteorology, hydrology, glaciers, geological, environmental, geographical and other scientific data and information to fill the Sanjiangyuan region to the first of a number of gaps in data on scientific and rational determination of the Yangtze River, Yellow River, Lancang source location, the establishment of a national geographical indications, and other related research has laid a solid foundation.

在2008年9月6日至10月16日的综合考察中，科考队员历时41天，行程7300多千米，利用全球卫星定位系统、地理信息系统、遥感等现代测绘高新技术，对三江源地区有关的19个源头进行了实地考察和综合观测，获得了测绘、气象、水文、冰川、地质、环境、地理等方面的科学数据与资料，填补了三江源头地区地学数据的多项空白，对科学、合理地确定长江、黄河、澜沧江源头地理位置，建立国家地理标志，开展相关学科研究等奠定了坚实基础。

Objective:To study the feature and regular pattern of body surface ST potential mapping of patients with coronary heart diseasesconfirmed by coronary angiography and explore the diagnostic value of body surface ST potential mapping for CHD.

目的：研究经冠状动脉造影确诊冠心病患者体表电位ST标测的特征和变化规律，探讨其对CHD的诊断价值。

The problem is researched that under what conditions the - resolvent operator of - subdifferential mapping of a proper functional is aLipschitz continuous single-valued mapping on whole space.

利用冲一预解算子分析了有限维欧氏空间中的广义参数集值变分包含问题唯一解的灵敏性；利用预解算子分析了有限维欧氏空间中的一般参数集值变分包含问题解集的灵敏性。

A highly resistant primitive cultivated species Solanum phureja was employed to generate a mapping population to perform the bulked segregant analysis for screening of AFLP markers linked with the resistance. Another population which had genetic similarity to the mapping population was used for testing of the markers achieved.

以马铃薯青枯病高抗性的原始栽培种Solanum phureja获得的二倍体群体为作图群体进行AFLP标记的初步筛选，另选一个与作图群体有较大亲缘关系和相近遗传背景的二倍体群体对所获标记进行验证。

The existence theorem of generalized weak efficient solutions with respect to variable, cone for a linear G〓teaux differentiable mapping is proved with set valued mapping fixed-point theorem and the relation between a vector optimization and a variational inequality problem. The existence of weak efficient solutions for multi-objective convex vector optimization is characterized.

建立映射在线性G〓teaux可微条件下关于可变锥的广义弱有效解的存在性及多目标凸向量优化问题在G〓teaux可微条件下弱有效解的特征，利用集值映射不动点定理及向量优化与变分不等式的关系证明线性G〓teaux可微锥凸映射关于可变锥的广义弱有效解的存在性定理。

Pachomius manual labour was organized as an essential part of the monastic life; and since it is a principle of the monks as distinguished from the mendicants, that the body shall be self-supporting, external work of one sort or another has been an inevitable part of the life ever since.

根据圣pachomius体力劳动组织作为一个重要组成部分寺院生活；以来，这是一个原则的和尚，作为有别于乞丐，该机构应自支撑，对外工作的这种或那种已一个必然的一部分，生活至今。

In order to study the effects of parametrical rolling on the ship movement and tilts, in allusion to ship's navigating in regular following waves, the equation of ship rolling motion is transformed into normal Mathieu equation by proper variable replacement when strong parametrical excitation in restoring moment varied according to sine or cosine wave.

为研究参数横摇对船舶运动和倾覆的影响，通过对船在规则波上随浪航行时，恢复力矩中出现的1个以正余弦规律变化的强参数激励项进行适当的变量置换，将船舶的横摇运动方程转换成标准形式的Mathieu方程。