查询词典 mathematical expectation

According to mechanism of ECBM/CO2 sequestration, a mathematical model was developed. In the mathematical model, two-phase flow, multiple gas components and mixed gas sorption, impact of coal matrix shrinkage and swelling on permeability, pressure loss in wellbore were studied.

给出了多分支井模拟CO2注入开采数学模型，模型考虑了气水两相流动、多组分气体吸附、煤基质膨胀和收缩对渗透率的影响以及分支水平井井筒压降；根据数学模型得到了相应的数值模型和计算程序，进行了模拟计算对比。

In the layout analysis, we chose a bottom-up algorithm based on nearest neighbor connect-strength and line confidence to segment the image area, table area and text area; In the printed Chinese character recognition module, we calculate the degree of incorporative difference to match the character, also define a refusal class which could orientate the mathematical expression automatically; Put the expression into the formula processing module, then we chose the character segmentation method based on connectivity and the template match method to recognize the character in the mathematical expression and at last we used the structure analysis based on the character to transform the two dimension formula into one dimension Word EQ expression.

在版面分析中，采用基于最近邻连接强度和行列可信度的自底向上的版面分析算法，分割出图像区域、表格区域和文本区域；在汉字识别模块中，采用回溯切分方法切分出字符段，计算合并差异度与特征字典比较，通过引入汉字的拒识类，从而实现了公式的定位；将定位后的数学公式送入公式识别器，在公式识别器中采用基于连通域搜索的字符分割方法和模板匹配方法对字符识别，对于识别出的字符，再采用基于特征字符的结构分析方法，从而将二维的数学公式转化为一维的Word EO域语句。

A new kind of the mathematical discription of fines deposition, release and migration in porous media was formulated. So, a new mathematical tool was given for the quantitative discription of the injectivity decline due to the fines problem.

与现存理论相比，本文提出的数学模型具有如下方面的特点： 1、由于直接从微粒在孔隙内的动力学特征出发，因此，模型中需要由实验确定的模型参数较少，同时，模型中不出现由实验确定的经验的关系式。

This dissertation focuses on the vector stochastic integral and its applicationsto mathematical finance. We first conduct a comprehensive study on VSI and provide aneconomical justification on the question of why VSI is more suitable than the component-wise stochastic integral for mathematical finance.

本论文以向量随机积分为主线，首先较为系统地研究了向量随机积分，给出了在金融数学中使用向量随机积分较之使用按分量的随机积分更合理的经济学解释。

The in paper discnssed to mathematical model of quality control for TMP pulp,establishing an set mathematical model for consistency control and interstice control of disc refiner.

通过TMP盘磨机磨浆的大量试验数据，提出并建立了控制磨浆质量的数学模型，即控制磨浆浓度的数学模型和控制盘磨间隙的数学模

As von Neumann computers are based on the theory of mathematical logic, current computers are incomparably successful in processing mathematical problems. However, it's very difficult for them to process linguistical information such as natural language.

由于冯。诺依曼式计算机的理论基础是数理逻辑，现今的计算机处理数理问题无比成功，然而处理自然语言等文理信息却非常困难。

"Logicists supposed that abstract mathematical objects can be entirely developed starting from basic ideas of sets and rational, or logical, thought; a variant of logicism, known as mathematical Platonism, views these objects as existing external to and independent of an observer"

逻辑主义认为抽象的数学对象全部可以从基本的几组想法以及合理的或逻辑的思想发展出来，称为数学的柏拉图主义的一个变型把这些对象看作是观察者之外的、独立的存在

"Logicists suppose d that abstract mathematical objects can be entirely developed starting from basic ideas of sets and rational, or logical, thought; a variant of logicism, known as mathematical Platonism, views these objects as existing external to and independent of an observer"

逻辑主义认为抽象的数学对象全部可以从基本的几组想法以及合理的或逻辑的思想发展出来，称为数学的柏拉图主义的一个变型把这些对象看作是观察者之外的、独立的存在

By analyzing the dynamic coupling process of looper system and using the mathematical models of hydraulic cylinder and servo valve, a dynamic mathematical model of hydraulic looper system was built at the vicinity of the working point.

通过对活套系统动态耦合过程的分析，在工作点附件，结合伺服阀和液压缸的模型，建立起液压活套系统的动态数学模型。

ABSTRACT It is very difficult to get exact mathematical models of industrial processes, models used in design procedure of control systems are commonly mathematical models through approximation.

在实际工程应用中通常很难得到被控对象的精确数学模型，在控制系统设计过程中所采用的模型常常是在一定程度上的经过近似化处理的数学模型。

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。