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Based on the typical structure of the air-cooled condenser of 600 MW unit, the three-dimensional physical and mathematical models for the flow and heat transfer of the cooling air in an air-cooled condenser cell with flow guiding device were established.

该文针对600 MW直接空冷机组空冷凝汽器的典型结构，建立了带有空气导流装置的凝汽器单元内冷却空气三维流动传热过程的物理数学模型。

In order to verify the validity of the mathematical models and the calculation method, a series of experiments on the performance of an air-conditioner under variable conditions was conducted in the psychrometric rooms.The performances of the proto type under the different inlet air temperature of the condenser and evaporator, as well as the different face velocity of the condenser and evaporator was measured.

为了验证数学模型及计算方法的正确性，在焓差法空调器性能实验台上对一台房间空调器变工况性能进行了实验研究，测量了该空调器在不同的蒸发器和冷凝器进口空气温度、蒸发器和冷凝器迎面风速下的工作特性。

Research on water hammer characteristics of air valves Research on water hammer characteristics of air valves has been studied in experiments by establishing mathematical model of the air valve, using suitable method of numerical calculation, and comparing the experimental outcomes with theoretical analysis.

空气阀特性研究试验研究了作为水锤防护装置的空气阀的特性，建立了空气阀数学模型，通过合适的计算方法进行数值计算，并与试验进行了比较。

This paper established a multi-objective mathematical optimization model based on the above analysis,and constructed air passenger services free shuttle system framework.

基于以上分析构建出航空客运票务服务免费接送系统的架构，并根据此架构，提出了可行性的设计。

In an earlier paper [2], we suggested the Mathematical model of helicopter rotor airfoil.

在[2]里，我们提出了直升机旋翼桨叶的数学模型。

In order to change the test of closed water for the high pressure vessel for the closed air test, according to the requirement of airtightness for high pressure vessel,the quantitative mathematical model for closed water test was built by analysis of free going out for small orifices in fluid mechanics.

为将高压容器密闭性的闭水检测改为闭气检测，根据高压容器密闭性能的要求，通过对流体力学小孔口自由出流分析，建立了闭水试验定量数学模型。

John Wilkins (1614-1672) reproduces in his book Mathematical Magick p.228 an alchemistic receipe, which is attributed to Paracelsus.

约翰威尔金斯（ 1614年至1672年）抄录在他的书中数学Magick p.228一个炼金术receipe ，这是由于巴拉赛尔苏斯。

A mathematical relation model between liquor near infrared spectrum and liquor alcoholicity was established by use of the combination of discrete cosine transformation and BP neural networks, which was a new approach for rapid liquor alcoholicity determination.

采用近红外光谱的离散余弦变换和BP神经网络相结合，建立了白酒近红外光谱与其酒精度之间的数学关系模型，为快速检测白酒的酒精度提供了一种新的方法。

British mathematician, philosopher and Nobel Prize winner Alfred North Whitehead (co-author, with Bertrand Russell , of Principia Mathematica , widely considered by specialists in the subject to be one of the most important and seminal works in mathematical logic and philosophy) declared

英国数学家，哲学家，诺贝尔奖获得者Alred North Whitehead（与Bertrand Russell共同撰写数学基本原理，是一个被专家普遍认为在相关数理逻辑和哲学主题内最重要最学术的作品）宣称

A generalized mathematical model was developed to describe the distribution of over-potential.Dimensionless variables μ and ω that characterize the polarization and influence of side electrode reaction in the system,were derived from modeling.Adomian's decomposition methodADM）was used to solve the nonlinear differential equation of the model to obtain an approximate analytical solution,which was in the form of algebraic expressions of infinite power series.By the solution,the relationship between over-potential distribution and average selectivity could be easily calculated without solving the nonlinear model time and again.

建立了描述超电势分布的普遍化数学模型，归纳出表征电极极化和副反应影响的量纲1数μ和ω，并用ADM（Adomian's decomposition method）对该非线性微分方程模型求解；所获得的逼近解代数表达式，可方便地计算不同参数下超电势分布对平均选择性的影响，而毋需反复求解模型微分方程。

I can still vividly recall the impressive scenes you gave. You were among my friends and relatives who accompanied me from my house to the seaport and when the porters were slow to show up, you obligingly carried my suitcase for me.

你对我的种种感人情意，使我记忆犹新，那天你随着我的亲友从家里送我上轮船，搬运工迟迟不来，你毅然替我提着皮箱上船。

St. Nicholas became the patron saint of Russia, where he was famous for his red cape, flowing white beard, and bishop's mitre.

圣尼古拉成了俄罗斯人的守护神，在那里，他以身披红斗篷，留着飘逸的白胡须，戴着主教法冠而闻名。