查询词典 mathematical expectation

According to boundary layer theory, a physical and mathematical model of falling film absorption in a vacillating vertical tube with TFE/NMP solution is presented for the first time based on the study of that absorption inside a static vertical tube.

根据边界层理论，在静态降膜吸收研究的基础上，首次提出摇摆状态下TFE／NMP垂直管内降膜吸收过程物理和数学模型。

According to the mathematical model, the material consumptions are calculated, which are accurate enough to meet most experimental results.

据此进行的理论计算值与实验结果符合。

These mathematical contraptions had the charming feature that when they were not needed they worked perfectly, and when they were needed they did not work at all.

这些奇妙的数学模型有一个迷人之处：当你不需要它们时，它们非常管用；而当你需要它们时，它们就不管用了。

The archive will be divided into four categories:"Made in Britain", which examines important discoveries in science and technology that have led to new industrial applications;"A Changing Planet", which focuses on geology and environmental sciences;"The Factory of Life", which will investigate how new technologies have changed medical practices; and "Cosmologies", which will take in mathematics, mathematical physics, cosmology, astronomy, statistics, and high-energy physics.

这份口路档案将分成四大类：&英国制造&，主要调查推动工业应用的重大科技发现；&正在改变的地球&，主要着眼于地理与环境科学；&生命工厂&，主要探究新技术史如何改变医疗实践的；最后，&宇宙哲学&，将囊括数学，数学物理，宇宙学，天文学，统计学，高能物理等领域。

By soluting each level respectively, which makecomplex of construcing heat pump distillation process to be a better solution. By analyzing the thermodynamic properties of conventional distillation and heatpump distillation, mathematical model and computational method is established. Byoptimizing method of designing various structures, the most costeffective isdetermined.

通过分析常规和热泵精馏系统的热力学特性，建立了热泵精馏流程数学模型及优化设计方法，针对不同的热泵精馏流程结构采用不同的优化设计方法以获得最大的经济效益；为验证热泵精馏流程的可行性提供有利依据，建立了用于确定热泵精馏热集成方案的经济评价标准；将策略与优化设计算法相结合应用于热泵精馏流程，以实现构建较优热泵精馏流程。

In chapter 2, the mathematical model which governs the flow in non-circular crosssection channel is established, FEM is used to discrete the equations.

为工程实际中设计和选择异形断面流道提供依据。

In this thesis, multimode network technique combined with staircase approximate technique is used to establish a mathematical model to analyze the leaky wave antennas based on NRD guide with arbitrary transverse crosssections.

论文首先利用多模网络方法结合阶梯近似技术构建了适合分析任意截面形状的NRD波导漏波天线特性的数学模型。

Integrators and differentiators work EXACTLY the same as their mathematical counterparts.

积分器和微分器的工作原理和数学中的积分和微分是一致的。

To analyze temperature rise influence by power plant thermal effluent, a 2-D hydrodynamic and thermal diffusional mathematical model was established based on previous work and with river regime-fitted computational meshes.

为了研究电厂温排水对其受纳水体环境温升影响，在已有工作的基础上，建立了基于河势贴体计算网格形式的平面二维水动力及热扩散数学模型。

Based on the analysis of working process of ejection gun of rocket ejection seat ,the physical and mathematical models of interior ballistics of ejection gun were established and the interior ballistics parameters of a rocket eject seat were validated by test and calculation.

在分析火箭弹射座椅弹射动力系统的工作过程的基础上，建立了其内弹道的物理模型和数学模型，并对某型火箭弹射座椅弹射动力系统内弹道进行了试验验证与计算，试验所测膛内气体压力随时间变化曲线与计算曲线基本吻合，弹射过程最大压力pm、工作时间tg、出口压力pg和出口速度vg分别为24.20(24.57)MPa，157(155)×10-3s，22.27(21.83)MPa，16.61(16.59)m.s-1，各特征参数的计算值最大误差小于3%。

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。