Then a man appeared and said that As ball had come to rest out of bounds in his garden.

You continue the simulation until your dynamic body has come to rest ( that is, sleeping).

继续仿真直至动态物体静止（即休眠）为止。

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Develops a system of closed first-order ordinary differential equations to describe the behavior of gas-particle flow passing through constant section duct in the view of the laws of conservation of mass, energy and momentum.

根据质量，动量和能量守恒等基本原理，建立了描述等截面管道中气固两相流行为的一阶常微分方程组，数值计算结果表明，颗粒终速随管长增加或随粒径减小而增大；

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By choosing parameters of biomass gas produced by fixed-bed downdraft gasifier, according to the principle of heat transfer and conservation of mass, this paper optimized the design of the biomass gas cleaning device.

选择固定床下吸式气化炉产生的秸秆燃气为参数，根据传热学及质量守衡原理，优化设计出了秸秆燃气净化装置。

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Establish the mathematical model of various aspects of heating system based on the law of conservation of mass and energy, and then establish the simulation model of various aspects and the whole system by MATLAB/ SIMULINK tool.

根据质量和能量守恒定律对供热系统的各环节建立了数学模型，然后运用MATLAB/SIMULINK工具建立各环节及整个系统的仿真模型。

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Based on the simultaneous solution of conservation of mass, momentum and energy, a homogeneous model and a separated two-fluid flow model have been developed for the single-loop pulsating heat pipes.

在对控制单元进行质量、动量和能量守恒分析的基础上，分别建立了适用于毛细管内气液两相流的均相和分相模型，并将其应用于脉动热管中。

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According to the law of conservation of mass and energy, the device modules' dynamic equations of hydraulic condition and thermal condition are deduced, and the mathematical model of device modules are built.

依据质量守恒和能量守恒原理，推导各模块的水力特性、热力特性动态方程，建立模块的数学模型。

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According to the simulation method bring forward, the simultaneous equations of the conservation of mass equations, the dynamics equations of moving parts and the pressure wave equations in all boundaries are solved.

根据所提出的模拟计算方法编制了相应的仿真程序，联立求解了各边界处的质量守恒方程、运动件的运动方程和高压油管中的压力波动方程。

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Based on the conservation of mass and energy, applying the theories of transfer heat and pump, the paper gives the methods and process how to build the dynamics mathematical simulation model of feed-water system.

以质量和能量守恒定律为基础，应用传热学及泵的有关理论，建立了给水系统中除氧器、给水泵、小汽机、高压加热器等设备的动态数学模型。

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It contains Euler equations for conservation of mass, momentum and energy, and Poisson equation through which the gravitational potential is determined by the density distribution of the gas itself.

它包括由质量守恒方程、动量守恒方程和能量守恒方程构成的Euler方程组以及由星体本身的密度分布决定的自引力势能所满足的Poisson方程。

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The time-averaged equations for conservation of mass, momentum, and energy are solved. A low Reynolds number k-ε model is used to simulate the turbulent transport.

选用低雷诺数k-ε模型模拟湍流传递；求解时间平均的质量守恒方程，动量守恒方程和能量守恒方程；

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Based on the conservation of mass and conservation of energy and reasonable hypotheses for the dynamic thermal system, the dynamic simulation model of spray desuperheater was established using lumped parameters method.

根据质量守恒定律和能量守恒定律，经过合理的热动力学假设，采用集总参数的方法建立了喷水减温器的动态仿真模型。

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And according to the law of conservation of mass and energy, the ideal gas equation of state and the propeller works to establish a mathematical model of ship propulsion systems.

并根据质量和能量守恒定律及理想气体状态方程以及螺旋桨工作原理建立了船舶推进系统的数学模型。

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Governing equations are available according to laws of conservation of mass, momentum and energy, which are general for unsteady flow and heat transfer in round pipelines.

通过质量守恒定律、动量守恒定律和能量守恒定律，推导出了热油管道不稳定过程变物性耦合流动的控制方程，该控制方程对于圆形管道内的非稳态流动与换热具有通用性。

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Based on the conservation of mass, energy and chemical compositions, a model of seam-cavity growth is established to describe the process of underground coal gasification.

通过质量守恒、能量守恒和化学组分平衡描述了煤炭地下气化过程，建立了煤炭地下气化中燃空区煤层扩展的数学模型，根据试验条件进行数值求解。

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However, the original measurement data often contain various errors, so the basic balanced relations, such as energy balance or conservation of mass, cannot be satisfied.

但由于测量中不可避免的误差，测量值不能精确地符合生产过程中一些内在的物理和化学规律，如化学反应计量关系、物料平衡和热量平衡关系等等。

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The dynamic system model is coupled with geothermal heat exchanger model and heat pump unit model, which is based on the conservation of mass and energy.

采用确定性模型法建立了热泵机组的模型，然后通过能量和质量守衡方程式建立了系统动态耦合模型。

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According to the law of conservation of mass, the mathematics model of Modified-Atmosphere Packaging ( MAP) is educed.

根据质量守恒定律和果蔬采后呼吸生理，推导出薄膜气调包装（MAP）的数学模型。

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We invoke Dalton's Law of molar proportions, we write it subject to conservation of mass.

我们援引了摩尔分数的道尔顿定律，要服从质量守恒定律。

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At the system level, it follows the first principles to keep the conservation of mass, energy, and momentum, respectively.

该方法在系统层面，采用传统的基于质量守恒、能量守恒、动量守恒的建模思路，保持模型的通用性。

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So, what's the conservation of mass if we divide by the atomic masses here?

那么质量守恒是什么呢？，如果我们在这儿按原子质量划分？

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