数学基础

A optimum design model of cross-feed and parallel-feed multi-evaporation systems were established on the basis of conventional design to accomplish the optimum energy-saving effect.

为了达到最佳的节能效果，在复杂错流、平流多效蒸发系统常规设计通用数学模型的基础上建立了系统优化设计的数学模型。

Moreover, this article has made a quantitative research of ship s leeway and drift angle s in different wind and currents after maneuvering.

本文在船舶平面操纵运动数学模型的基础上，建立了考虑浅水以及风、流干扰力和力矩作用的船舶操纵运动数学模型，并就船舶在横风横流作用下的风流压差角进行了定量的研究。

Also, a mathematical model for grinding four plane facet drill point is given at the end of the paper, which provides a theoretical basis for new drill grinder design.

本文在现有钻尖数学模型研究的基础上，进一步完善了基本型群钻的数学模型。

An open-ended mathematical problem, to which there is not only one method to solve and not the only answer, draws the students attention to think and find out the various answers to the problem by themselves instead of depending on their teachers and textbooks. Students are changed into the active thinkers and finders from the passive accepters. In this way studcnds are guaranteed to play the main role and helped to form their self-awareness and independence of their personalities.

数学开放题由于其自身的开放性质，不再是方法唯一，答案唯一，这就吸引学生不依赖教师和课本，独立地去探索和发现问题的各种各样的答案，学生由知识的被动接受者转变为知识的主动发现者和探索者，保障了学生的主体地位，从而在利于学生自我意识和独立人格的形成，为培养学生的创新精神奠定了基础，对全面推进中学数学素质教育有重要意义。

This thesis systematically reviewed the development of research methods of domestic and foreign float glass tank, and using Computational Fluid Dynamics software Fluent established mathematical model of glass flow and heat transfer model in the float glass tank.

本文在前人关于浮法玻璃熔窑数学模拟研究的基础上，利用计算流体力学模拟软件Fluent建立了浮法玻璃熔窑内玻璃液传热与流动模型的数学模型，适当利用简化处理方式对浮法玻璃熔窑内玻璃液流场和温度场进行数值模拟。

According to the foundings and results of the research, this reportputs forward the objective of introducing foreign genetical materials andthe method and measurements of cultivating new varieties consideringthe germplasm resources of Chinese alfalfa germplasm resources.

在数量分类的基础上，应用双重筛选逐步回归分析建立了中国苜蓿遗传属性与环境生态因子梯度相关的数学模型，反映了DCA排序与水分和热量的数学关系。应用这些模型可以预测中国苜蓿基因生态类型的时空格局。

The detailed finite element analytical computation was successfully carried out on this structure and the stress and strain distribution of this structure were obtained under various actual operating conditions, thus laid a foundation for the structural improvement and optimization design of the rear loaded garbage compressing cart.

采用实际测试和变参数描述相结合的方法给出垃圾载荷的数学表达，利用ANSYS进行结构有限元分析调校载荷数学表达中的可变参数，保证了分析计算与实验测试结果的一致性，成功地对该结构进行了详尽的有限元分析计算，获得了该结构在各种实际工况下的应力及变形分布，为后装式压缩垃圾车的结构改进与优化设计打下了基础。

Synthetical evaluation index system of tractive performance and economic performance of automobile is presented on the base of summarizing former studies.

在建立发动机及整车动力性、经济性数学模型的基础上，提出了传动系参数综合优化模型；并建立了相关参数对汽车动力性与燃料经济性的弹性系数数学模型。

Based on the theory of construction machinery, this paper establishes the mathematical model to forecast wheel loader tractive performance. By using relative software, it compares and analyzes calculated result and test result so as to validate the right and the science.

本文主要以工程机械理论为基础，建立轮式装载机牵引性能预测的数学模型，利用相关的性能预测软件，把软件计算的结果和试验结果加以对比、分析，从而验证数学模型的正确性和科学性。

On the basis of the mathematical models got by different measuring methods, a complete universal mathematical model was put forward by which different tappets lifts can be converted from one to another.

针对凸轮升程测量量具及方法不统一而造成升程转换困难及转换误差较大等问题，在研究凸轮升程各种测量方法数学模型的基础上，提出一个不同形式推杆升程相互转换的通用数学模型。

We have no common name for a mime of Sophron or Xenarchus and a Socratic Conversation; and we should still be without one even if the imitation in the two instances were in trimeters or elegiacs or some other kind of verse--though it is the way with people to tack on 'poet' to the name of a metre, and talk of elegiac-poets and epic-poets, thinking that they call them poets not by reason of the imitative nature of their work, but indiscriminately by reason of the metre they write in.

索夫农 、森那库斯和苏格拉底式的对话采用的模仿没有一个公共的名称；三音步诗、挽歌体或其他类型的诗的模仿也没有——人们把&诗人&这一名词和格律名称结合到一起，称之为挽歌体诗人或者史诗诗人，他们被称为诗人，似乎只是因为遵守格律写作，而非他们作品的模仿本质。

The relationship between communicative competence and grammar teaching should be that of the ends and the means.

交际能力和语法的关系应该是目标与途径的关系。