查询词典 mathematical notation

The course contains four sections as follows: mathematical logic (including basic concepts of propositional logic and predicate logic, propositional calculuses and inference theories), set theory (including set algebras, relations, functions and cardinal numbers), algebraic structure (including algebraic systems, semigroups and groups, rings and fields, lattices and Boolean algebras), graph theory (including basic concepts of graph, Euler graphs and Hamiltonian graphs, trees, planar graphs and coloring graphs, some special vertex subsets and edge subsets).

本课程包含四部分内容：数理逻辑（包含命题逻辑与一阶逻辑的基本概念、等值演算以及推理理论），集合论（包含集合代数、二元关系、函数和基数），代数结构（包含代数系统、半群与群、环与域、格与布尔代数），图论（包含图的基本概念、欧拉图与哈密顿图、树、平面图及图的着色、图的某些特殊的顶点子集与边子集）。

This article thoroughly studied an usable widely VRPTW of logistics distribution, and constructed the mathematical model about this problem, designed a new genetic algorithm to solve VRPTW and with C language programming to test it with an example, finally has obtained satisfaction solution, so had guaranteed enterprise not only satisfy the customer's distribution demands, but also caused the vehicles have the shortest routing, as well the cartage expense was smallest.

本文深入研究了VRP中应用日益广泛的VRPTW问题，构建了该问题的数学模型，设计了求解VRPTW的新型遗传算法，并用C语言编程对该算法进行实例测试，结果得出了满意解，保证了物流企业在满足客户配送需求的同时，又使得运输车辆的配送路径最短、运输费用最小。

In this research, the plane 2D mathematical model under Cartesian coordinate system and the

首先建立了直角坐标系正交网格下的平面二维数学模型及复杂边界适体坐标条件下的三维紊流数学模型，对方程的离散差分格式、控制方程的求解、初始边界条件、动边界处理等问题进行了分析研究，并编制相应的计算程序。

Vector mainly in plane geometry, Cartesian coordinate system, trigonometric functions, such as knowledge-based, learning through Vector, on the one hand, our mathematical expression of understanding entered a new field, on the other hand will enhance our space imagination capacity, the ability of thinking and analysis, the ability to solve practical problems.

向量主要以平面几何，直角坐标系，三角函数等知识为基础，通过向量的学习，一方面将我们对量的数学表达式的认识进入到一个新的领域，另一方面将增进我们的空间想象能力，思维能力和分析，解决实际问题的能力。

Firstly,the cartesian coordinate system of joint mechanism is defined,and a mathematical model is constructed to express the relationships among the structure parameters,workplace and dynamic features of the driving joints.

通过定义关节结构的笛卡尔坐标系，建立反应关节结构参数与工作空间、动力学特性之间的数学模型，得出了腕关节在不同动作方式下的驱动原理，最后利用CATIA对腕关节结构进行了电子样机分析。

It is constructed by both kind of'thinking-mathematical operations, one is to truncate the mark Cartesian coordinates by two hyperpl...

也是人类非单调推理的一个自然的数学表示框架。

The unified mathematical description of these two ways usually uses the Cartesian coordinates or polar coordinates formulas.

这两种表示的数学描述通式，一般是在直角坐标系下的点或者矢量表达式。

A visit to Paris in 1672 introduced him to the 'new philosophy' of Cartesianism and to the mathematical and mechanistic physics of Christiaan Huygens.

阿在1672年访问巴黎介绍他的'新哲学的笛卡儿'和对惠更斯数学和物理机械。

Good mathematical optimum design method is very important for improving the performance of cascades.

叶栅的数值优化设计方法对于提高叶栅性能、缩短叶栅设计周期和降低设计成本具有非常重要的实用价值，目前已成为叶栅设计研究领域中一个非常活跃的。。。

Casson fluid ; velocity profile ; temperature profile ; mathematical model calculation ; study

Casson流体；速度分布；温度分布；研究

Objective:To compare the response control and attention of Schizophrenic patients with that of the healthy controls by Integrated Visual and Auditorycontinuous performance test. To quantitate the impairment of cognitive function in patients, and to explore the relationship between cognitive function and the severity of the disorder.

目的：探讨精神分裂症病人在IVA持续操作测试中的反应控制能力、注意力等，并与健康人进行比较，从而量化精神分裂症病人的认知功能损害，并进一步探讨其认知功能与疾病严重程度的关系。

Main effective factors including subcooling degree, mechanical vibration, gas hydrate reformation, environment temperature, noncondensing gas and surfactant are analyzed.

指出过冷度、机械振动、重复生成水合物、环境温度、不凝性气体、添加剂是影响气体水合物生成的主要因素，还对R152a水合物的放冷进行了实验研究。