气体动力学

Therefore, Boyle's law, a principle of air statics, may not be appropriate for measuring pressure changes of flowing air. In this study, we deduced equations for pressure changes inside pressure-type plethysmograph and then designed three experiments to testify the theoretic deduction.

为了研究气体流动本身对描记箱内压力是否产生影响，本研究采用空气动力学理论推导出压力型体积描记箱内压力变化的近似公式，并设计了三个实验对理论公式进行证明。

The rates of gas carburization in practical atmospheres have been investigated at 925℃.

建立了以CO解离吸附与氧脱附为基础的气体渗碳动力学模型。

The main conclusions and results are detailed below:(1) The factors affecting explosion limits such as temperature, pressure, explosion vessel size, spark ignition energy, inert gas etc, are analyzed according to the theory of chemical reaction dynamics, combustion and engineering thermodynamics.

主要工作如下：(1)根据化学反应动力学、燃烧学和工程热力学的基础理论，从本质上定性的分析了爆炸极限的影响因素，包括温度、压力、爆炸容器的大小、点火能量大小以及惰性气体等，得出了这些影响因素对爆炸极限的影响规律。

We have observed gaseous diatomic molecule on the semiconductor surface with the chemical-physics dynamic mechanism of the chemical adsorption on the dangling bond. We explored on the phenomena in how gas molecules dissolve, how the atoms move, and on how they replace the bondings during the chemical adsorption process on the surface.

本论文主要在研究气态双原子分子化学吸附於半导体表面悬键上的化学物里动力学机制，并探讨气体分子在表面化学吸附过程中的分子裂解、原子移动、取代键结等现象。

Based on the smoothed particle hydrodynamics model, we first establish a new pressure equation of state instead of traditional ideal gas equation of state.

基于平滑粒子流体动力学模型，首先提出一种压力状态方程以取代传统的理想气体状态方程，从而在保证系统稳定性的同时，最大程度地保证液体的体积守恒；为了实现对水面浪花飞溅和泡沫的模拟，提出自适应的表面张力模型，通过制定3类流体粒子状态的转化规则，实现了飞溅粒子和主水体之间的无缝连接；并采用GPU图形硬件加速技术大大地提高了整个过程计算效率。

A good example of this is found in the kinetic molecular theory, in which gases are pictured as being made up of many small particles that are in constant motion.

这方面的一个好例子就是分子动力学理论，这个理论把气体形容成是由许多不断运动着的微小粒子构成的。

The hemodynamic gas exchange and lung function were recorded at baseline and 30min after the treatment. The content of methemoglobin was detected before and after the NO inhalation.

于治疗前及治疗后30min观察血流动力学，气体交换及肺功能改变，并于NO吸入前后记录血浆高铁血红蛋白含量。

Computer simulation of the mechanism of gas separation through carbon molecular sieve membranes has been developed in recent years, including the development and choice of simulation methods, and the non-equilibrium molecular dynamics method.

介绍了近几年来碳分子筛膜气体分离机理研究的状况，包括模拟方法的发展和选择、已有的非平衡分子动力学方法及目前模拟研究成果。

This make it difficult to know the essence of fluidized beds. In order to viewthe motion behavior of a single particle in a fluidized bed in a reasonable cost, thegas-solid flow in a fluidized bed is modeled by a combined approach of discrete particlemethod and computational fluid dynamics, in which the motion ofindividual Particles is obtained by solving Newton\'s second law of motion and gas flowby the Navier-Stokes equation based on the concept of local average.

为了用数值模拟方法来弥补传统实验方法的不足，达到从单个颗粒的尺度上来研究流化床中颗粒的运动和气体流场的剧烈变化情况的目的，本论文建立了基于用Newton第二定律计算单个颗粒运动轨迹的离散颗粒法和基于区域平均值的计算流体动力学方法的数学模型的建立和求解过程；并依据Newton第三定律建立了DPM模型和CFD模型的耦合模型，编写和调试了DPM和CFD的耦合程序。

A numerical method using high resolution scheme was established for the real gas which is described with properties or.

推导出一种用密度和内能或密度和比内能描述的真实气体的高分辨率数值格式，采用IF97计算公式设计相应的以为变量的水和水蒸气性质表，并用一种快速插值的方法将表格中的水和水蒸气状态参数应用到流体动力学计算中。

On the other hand, the more important thing is because the urban housing is a kind of heterogeneity products.

另一方面，更重要的是由于城市住房是一种异质性产品。

Climate histogram is the fall that collects place measure calm value, cent serves as cross axle for a few equal interval, the area that the frequency that the value appears according to place is accumulated and becomes will be determined inside each interval, discharge the graph that rise with post, also be called histogram.

气候直方图是将所收集的降水量测定值，分为几个相等的区间作为横轴，并将各区间内所测定值依所出现的次数累积而成的面积，用柱子排起来的图形，也叫做柱状图。