查询词典 mathematical expectation

To strengthen mathematical symbol language analogy and symbol's suggesting function, to cultivate students' ability to transfer the mathematical narrative language to mathematical symbol language, to lead students to understand the definition of mathematical symbol and to regulate the writing of symbols will all contribute to developing mathematical thinking.

加强数学符号语言类比和符号提示功能教学，培养学生将数学叙述语言转换成数学符号语言的能力，引导学生正确理解数学符号的含义并规范符号书写，促进学生数学思维的发展。

Language in the Visual C ++ program to prepare the small company's management wages Data Structures Using C language simulation of the car park management, vehicle output reached, departure time and location C language environment in Turbo C 2.0 calculator program to prepare the basic functions, and provide visual interface SQL server database and the use of VC ++"student information management system" 2007,"Higher Education's Cup" National Mathematical Contest in Modeling (China's population growth projections) were third prizes Hubei Division Zhongnan University of Nationalities in 2006 Mathematical Contest in Modeling (the company's best production programme) won by their schools China and South Africa in 2007 by the national schools "Innovation Capability honorary title" 2006 "click space of a series of activities Poetry Speech Competition" The Excellence Awards 2006 - 2007 Zhongnan University of Nationalities professional third prizes August 2007 through selected to participate in the summer school mathematical modeling training September 2007 in "Higher Education's Cup" National Mathematical Contest in Modeling May 2006 Zhongnan University of Nationalities Mathematical Contest in Modeling Participate in the 2006 ACM Programming Contest 2006 Computer Science Institute participate in the "Click space series of activities," Poetry Speech Competition 2006 National University and South Africa to participate in "Click space series of activities," Program Design Contest China and South Africa in 2005 to join the University of the nation "Table Tennis Association"

++语言在Visual C++环境下编写程序实现小型公司的工资管理数据结构使用C 语言模拟停车场管理问题，输出汽车到达、离开时间及位置 C 语言在Turbo C 2.0环境下编写程序实现计算器的基本功能，并提供可视化界面数据库使用SQL server及VC++实现&学生信息管理系统& 2007年&高教社杯&全国大学生数学建模竞赛获湖北赛区三等奖 2006年中南民族大学数学建模竞赛（汽车公司的最佳生产方案）获学校一等奖 2007年获中南民族大学校&创新能手&荣誉称号 2006年&点击空间系列活动之诗歌演讲比赛&获优秀奖 2006年-2007年中南民族大学专业三等奖 2007年8月经过选拔参加学校暑期数学建模培训 2007年9月参加&高教社杯&全国大学生数学建模竞赛 2006年5月中南民族大学数学建模竞赛 2006年参加ACM程序设计大赛 2006年参加计算机科学学院&点击空间系列活动&之诗歌演讲比赛 2006年参加中南民族大学&点击空间系列活动&之程序设计大赛 2005年加入中南民族大学&乒乓球协会&

Radon variable; Mathematical expectation; Applications of mathematical expectation

随机变量；数学期望；数学期望的应用

The change of the family members' experiences to vision impairment can be presented by three themes: 1 The process of mood reaction: from hopelessness, guiltiness, indifference to cope with the visual impairment, respect and expectation; 2 The expectation in the future: from passivism, regret to expectation, focus on here and now; 3 The meaning of the visual impairment: from tribulation to treat the visual impairment in the meaning.

一、本研究从三方面检视家庭成员对视力受损事件主观诠释的改变：1。情绪反应的历程：从茫然、自责与漠然到适应现况、找回尊严与期待；2。对未来的期待：从消极、遗憾到期待、掌握现在；3。视力受损事件的意义：从磨难到看待其正向意义、把握当下。在时间的演进中，观察家庭成员对视力受损事件的主观诠释经验。

Because the mathematical linguistics are one kind by the mathematical symbol, mathematics terminology and the scientific language which is composed after the improvement natural language, therefore in mathematics teaching, the teacher not suitable direct use mathematical linguistics achievement teaches the language generally, but must act according to student's knowledge foundation and the psychological feature, transforms the mathematical linguistics as easily the language which is accepted by the student.

由于数学语言是一种由数学符号、数学术语和经过改进的自然语言组成的科学语言，因此在数学教学中，教师一般不宜直接使用数学语言作为讲授语言，而必须根据学生的知识基础和心理特征，将数学语言转化为容易被学生所接受的语言。

Psychology}, the paper defines intuition as a cognitive ability to make immediate judgement without analyzing or reasoning and further analyzes the relation and difference between intuition, inspiration, insight, imagination and perceptual intuition, pointing out that mathematical intuitive thinking is a swift judgement on and imagination to the objects of mathematics and their relationship in structure which is featured by illogicality, directness, probability, randomness and unity and aids students in predicting conclusion or direction to solution as well as making definite choice between several options, Furthermore, the paper probes into the foundation of mathematical intuitive thinking in terms of psychological mechanism, and thereupon holds it necessary to develop students mathematical intuition in that it does good to the excitement of creativity, improvement of overall qualities, all- brain development and optimization of mathematical thinking among students.

而数学直觉思维就是人脑对数学对象及其结构关系的一种迅速的判断与敏锐的想象，并探讨了数学直觉思维的生理机理基础，总结其特征有非逻辑性、直接性、或然性、随机性、整体性和综合性。在解题时直觉能帮助学生对结论或解题方向做出预见，也可以在推理面临多种可能性时，帮助学生做出果断的选择。

Then, it studies the supply chain management system as a complex system to confirm the state existing during operating of the system. After that, it conducts a probability analysis on the state which the system located by applying supplement variable method, and establishes the model of distributed parameter system in a form of partial differential equations. Combining C0 ? semigroup theory in the functional analysis, it conducts a dynamic analysis on the established mathematical model. Using this method, it obtains the mathematical expression of the dynamic solution and the steady state solution, and proves the uniqueness, non-negativity and the asymptotic stability of the system solution. This dissertation applies the Matlab tool and uses two-step, three-step Simpson integral equation to imitate the condition of system solution. Then, it adds possible mode of failure and the optimization adjustment state to the system, based on which it has established the distributed parameter system model which is described by partial differential system of equations. Combining the functional analysis C0 ? semigroup theory, it studies the established mathematical model, and obtains the mathematical expression of the dynamic solution system and the steady state solution. It has proven the existing of uniqueness of the system solution, the asymptotic stability of system solution and the system solution. In addition, it has lying the theory rationale for further analysis and the research on the optimization of system.

本文首先简要综述了供应链理论、可靠性研究、鲁棒性研究以及供应链鲁棒性研究的现状；然后，将供应链系统作为一个复杂系统来分析，确定了系统运行过程中所经历的状态，通过引入补充变量的方法，建立了用偏微分方程组描述的分布参数系统模型，用泛函分析中的C_0 -半群理论得到了系统动态解和稳态解的数学表达式，证明了系统解存在的唯一性、非负性和指数阶渐近稳定性；并借助Matlab工具，利用二阶、三阶辛普森积分方程模拟系统解的性态，并给出系统动态解的仿真图；本文又对上述系统增加了系统可能失效状态和优化调整状态，并在此基础上建立了用偏微分方程组描述的分布参数系统模型，同样用泛函分析中的C_0 -半群理论对所建立的数学模型进行了研究，得到系统动态解和稳态解的数学表达式，证明了系统动态解存在的唯一性、非负性及渐近稳定性，为进一步分析和研究供应链优化奠定了理论基础。

During the study, in order to decrease the complexity, the article simplifies the geomorphic process, defines the ideal state, and, according to the geomorphic principle, reasons out some of the 4-Dimensional Geomorphic Mathematical Sub-Models that include the 4-Dimensional Tectonic Geomorphic Mathematical Model, the 4-Dimensional Depositional Geomorphic Mathematical Model, and the 4-Dimensional Denudate Geomorphic Mathematical Model.

在研究过程中，为了减低复杂程度，简化了地貌过程，规定了理想条件，并根据地貌学原理推导了部分理想条件下的四维地貌数学模型，分别是四维构造地貌数学模型、四维沉积地貌数学模型和四维剥蚀地貌数学模型。

The major findings were as follows:(1) There were significant interactions between Feedback and Goal-setting in both students' mathematical performance and test anxiety;(2) No significant differences were found in mathematical performance and test anxiety between the student self-set goal condition and the teacher-assigned goal condition when feedback was presented;(3) There were significant differences in students' mathematical performace between correct-predicting students' and incorrect-predicting students, but no difference was found in students' test anxiety between the two groups of students;(4) High-estimating students and low estimating students showed significant differences in mathematical performance, but no difference in test anxiety.

在有回馈的情形下，学生自订目标与敎师指定目标间，其学生在数学作业表现或是在数学测试焦虑分数上均无显著差异存在。3。学生自订目标中，预测正确组与预测不正确组学生在数学作业表现上有差异存在，在数学测试焦虑分数上无差异存在。4。学生自订目标中，高估组与低估组学生在数学作业表现上有差异存在，在数学测试焦虑分数上无差异存在。

Going at the teaching of mathematical thought and method during high school is an important means by which the school in the 21th century cultivate the person with innovative spirit and practical bility.Moreover going in for the teaching study of the mathematical thought and method in high school can make ours absorb well the international and national mathematical thought and methodology knowledge,and improve the cognition to the importance of the teaching about mathematical thought and method,so that they are able to practise consciously and selfconsciously the teaching .

中学阶段进行数学思想方法的教学是21世纪学校培养具有创新精神与实践能力的人才的重要手段，而进行中学数学思想方法的教学研究更能使我们中学数学教师充分吸收国内外数学思想方法论知识，提高对数学思想方法教学重要性的认识，从而能够有意识、自觉地实践数学思想方法教学。

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。