查询词典 mathematical expectation

And it gives some suggestions to teachers on stressing the cerebration teaching in classroom teaching, explaining mathematical cerebration and methods actively, pointing out the principles and measures of enhancing mathematical cerebration and methods.

对教师在课堂教学中突出思想教学、积极探索数学思想方法教学提出了建议，指出加强数学思想方法教学的原则和具体措施。

If there's any mistake, I beg your pardon to point it out and correct it. There're five chapters totally in this paper, and the each main contents is al follows: Chapter 1, it introduces the mathematical methods, mathematical cerebration's implication and the association between them.

发现学生在解题时，其发展水平与思想方法渗透之间相适应和不相适应的行为表现，据此提出自己对在数学课堂教学中如何渗透数学基本思想方法的一点看法。

In this paper, mathematical models of soil-water characteristic curve are divided into four types based on the patterns of mathematical models.

本文对土水特征曲线数学模型进行了研究，依据这些模型的数学表达式形式，将其划分为4种类型。

By using the mathematical method of curve integrals,it derives the mathematical formula to calculate the cross-section ductile coefficient of RC ring section member.

从钢筋混凝土正截面承载力计算时的基本假定出发，建立了环形截面上各种应力图形的函数表达式，利用曲线积分的数学方法，推导出计算钢筋混凝土环形截面构件截面延性系数的数学公式。

Composite function is one of the important objects of mathematical analysis research,and some of it's analysis natures such as monotony, boundedness, limit,continuity, derivability,integrability are important content in the mathematical analysis,they are also important tool to study other objects in mathematics.

复合函数是数学分析研究的重要对象之一，它的一些分析性质（如单调性，有界性，极限，连续性，可导，可积性）是数学分析中的重要内容，也是研究数学中其它对象的重要工具。

The ranks of scientists and technicians engaged in industrial departments in the urban district of Qiqihaer city at present is quantitatively analyzed and calculated using the mathematical method of calculating society labour capacity, and adopting linear mathematical model without constant term; The scientists and technicians requirement by the end of this century is forecasted in this paper.

本文采用计算社会劳动生产率的数学方法，选用无常数项直线型数学模型，对齐齐哈尔市区工业现有科技队伍进行了定量分析及计算，并对本世纪末科技队伍总的需求做了预测。

To better integrate the decision progress with the technology of data warehouse, a mathematical description of the general problem's decision-making process was proposed and the knowledge classification of decision domain based on the mathematical description was provided as well.

为了将数据仓库技术和决策过程更好地结合，给出了一般问题决策过程的数学描述以及在此基础上的决策空间的知识分类。

Mathematical intuition is a direct reflection of mathematical object, structure and the thinking.

数学直觉思维是直接反映数学对象、结构以及关系的思维活动。

This makes more and more people pay more attention to studies and applications of numerical simulation in thermal recovery. In this research, we have developed a reliable mathematical model for thermal recovery, which takes a full consideration of the effect of viscos, gravitical and capillary forces on the three-phase flow of gas, water and oil, the effect of the temperature on the medium characteristics of liquid and solid, the phase equilibrium of gas-liquid in each component, heat transportation including connection, conduction and radiation as well as heat losses in both the overburn and underlying strata. In the space discreation of the mathematical model, we have proposed a new method based on the improvement of the conventional nine-points difference approximation, which has a higher difference accurancy.

本项研究以热力采油的主要机理为基础，充分考虑在粘性力、重力和毛管力作用下油水气三相流动，考虑温度对各种流体和固体介质物性的影响，考虑每一组分中汽液两相的相平衡，考虑热在地层中的传导、对流和辐射以及上下盖层的热损失，利用热力学第一定律、质量守恒定律和流体迁移定律，建立了正确可靠的注蒸汽数学模型；在对数学模型进行空间离散时，利用控制有限体积积分法，对以往的九点差分近似作了合理的改进，使其具有较高的差分近似精度：结果表明，该公式的近似精度要比以往文献中所给的九点差分近似精度高，可以认为，在油藏数值模拟中，如果遇到非均质情况，使用这种九点差分近似更合理。

Like most university graduates in mechanical engineering, I do not have the sufficient mathematical knowledge to judge major mathematical problems, i.e. Fermat's Last Theorem, Riemann's Hypothesis, Jiang Chun-xuan's proof of FLT, Wiles's in question proof of FLT, or Jiang Chun-xuan's disproof RH, etc.

像大部分机械工程大学毕业生那样，我没有足够的数学知识判断重大数学问题，如费马大定理〔FLT〕、黎曼假设〔RH〕等，以及蒋春暄对于FLT的证明、怀尔斯〔Wiles〕对FLT有问题的证明、蒋春暄对于RH的否定。

A carrier gas such as nitrogen is directed through line 20 and valve 22 to connect with line 26 and mix with the gas sample.

如氮气之类的载体通过管线20和阀22引入，与管线26相通，与气体样品混合。

But for the most part, knaves and parasites had the command of his fortune

然而支配他的家产的大多是恶棍和寄生虫。