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质量和能量
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  mass and energy
     Based on the mass and energy conservation laws, the dynamic mathematic model is constructed by applying graphical configuration of the MATLAB\SIMULINK in main equipments and process of condense water system of 200 MW steam turbine units. A simulating model for whole process of condensate water system of power plants is constructed through modular method.
     针对新型培训仿真机开发,以质量和能量守恒定律为基础,应用传热学及凝汽器、水泵的有关理论,在MAT LAB\Simulink平台基础上根据图形组态的方法,建立了200MW汽轮发电机组凝结水系统中主要设备及其流程的动态数学模型,同时采用模块化的建模方法,建立了凝结水系统的全工况动态仿真模型,并利用经验数据进行了静态特性、正常工况扰动及故障设置的数值实验。
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     Industrial dynamic processes are modeled with differential-algebraic equations (DAEs), where the DAE formulation consists of differential equations to describe the dynamic behavior of the system, such as mass and energy balances, and algebraic equations to ensure physical and thermodynamic relations.
     动态过程由微分方程或差分方程描述,称为动态模型,其中微分方程用来描述系统的动态特性,如质量和能量的守恒关系等等,而代数方程用来确保系统的物理和热力学平衡关系等等。
短句来源
     An inhomogeneous Benjamin-Davis-Ono-Burgers equation including topographic forcing and turbulent dissipation is derived in terms of the quasi-geostrophic vorticity equation, an approximate analytic solution of the BDO-Burgers equation with a small dissipation is obtained, the time variations of mass and energy of the algebraic solitary waves are discussed, and finally, the forced BDO-Burgers equation is integrated numerically and the numerical solutions are given for a given basic flow with a weak shear and a localized topographic forcing.
     利用包括地形外源和湍流耗散的准地转涡度方程导出了包含强迫项和湍流耗散项的非齐次强迫BDO Burgers方程 ,求出了小耗散存在情况下BDO Burgers方程的近似解析解 ,讨论了代数孤立波的质量和能量的守恒关系 ,最后 ,对给定的弱切变基本气流和局地地形强迫 ,数值积分强迫BDO Burgers方程 ,求得了不同参数下的数值解
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     The mass and energy change speed of the Ti B 2 coating paste for aluminum electrolysis during its solidification and carbo nization process was studied by the DTG and DDTA, and a reasonable heating progr am of solidification and carbonization was established.
     采用DTG ,DDTA等热分析手段 ,研究了高温固化、炭化过程中 ,铝电解用TiB2 阴极涂层糊料的质量和能量的变化速率 ,制定了涂层的变速固化、炭化升温制度 ;
短句来源
     By using a perturbation method, a forced mKdV equation is derived from the so\|called quasi\|geostrophic vorticity equation, and time evolutions of mass and energy of the mKdV solitary waves are discussed. Finally, numerical solutions of the forced mKdV equation are obtained by using the pseudo\|spectral method.
     利用扰动法由准地转涡度方程导出了强迫mKdV方程 ,讨论了强迫mKdV孤波的质量和能量的时间演变 ,并通过拟谱法求得了强迫mKdV方程的数值解 .
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  quality and energy
     The heat balance equation of plasma arc machining is established to improve the machining quality and energy utilization, and then the functional relation is given between the machining parameters and the machining material parameters, thereby a theoretical base for selecting the machining parameters provided reasonably.
     在保证加工质量和能量利用率的前提下,建立等离子弧加工热平衡物理方程,从而确定加工参数与加工材料参数之间的函数关系,为加工参数的合理选择提供理论依据。
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     The Selection of blades type and the design of blade geometrical parameter will directly effect the working quality and energy consumption of cultivator.
     刀片的形状选择及其几何参数的设计将直接影响到耕耘机的作业质量和能量消耗。
短句来源
     The imaging quality and energy distributing of the optical discreteness are extraordinary important to improve the ability for infrared seeker to seach,distinguish,seize and scout the aim,so we must quantificationally examine its imaging quality and energy distributing during the production, in prder to direct production and fitting more effectively.
     导引头光学组件的成像质量和能量分布对提高导引头对目标的搜索、识别、捕获、跟踪能力以及增加制导精度有着至关重要的作用,因此在生产过程中必须对其成像质量检测及能量分布进行定量检测,以便更加有效的指导生产和装配。
短句来源
     Of course it is very discommodious. Based on previous studies of the application software to calculation on properties of smoke flow in fire Network Modeling and the time forecast software of personal evacuate travel in high-rise building, according to the quality and energy conservation principle, the paper proposes fire flue gas temperature when the fire reaching a dangerous state in the network model, then evacuation time (ASET) can be calculated.
     本文在重庆大学开发成功的火灾网络模型烟气流动预测软件和高层建筑人员疏散行动时间预测软件的基础上,根据质量和能量守恒原理,提出了火灾网络模型下火灾达到危险状态的烟气温度值,这样便能计算出可用安全疏散时间(ASET);
短句来源
     Aiming at the newly-opened simulator for training, a dynamic mathematic model was constructed through graphical configuration on the MATLAB/Simulink flat roof for condensor of power plant, basing on the quality and energy law and theory of practical diathermalics. At the same time, a simulating model for single-pressure, double-pressure and triple-pressure condensor was constructed through modularization, and some numerical value experience for disturbing working conditions and malfunction was taken to test the model, basing on experiental data.
     针对新型培训仿真机开发,以质量和能量守恒定律为基础,应用传热学的有关理论,在MATLAB/Simulink平台基础上依据图形组态的方法,建立了大型电站凝汽器的动态数学模型,同时采用模块化的建模方法,建立了单压、双压、三压凝汽器的动态仿真模型,并利用经验数据进行了正常工况扰动和故障设置的数值实验。
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  “质量和能量”译为未确定词的双语例句
     In this experiment,the dose effect of the irradiation of low energy N + and Ar + and high energy He 2+ and F + on Uracil were measured,the effectivity of damage on Uracil was acquired under different experimental conditions,and the effect of the irradiation of ions with different energies and different masses on molecular remained rate were also discussed.
     测量了 30keV的N+、Ar+和 1MeV的He2 +、1 .2MeV的F+辐照尿嘧啶样品时的剂量效应 ,得到了不同实验条件下荷能离子对样品的损伤效率 ,同时研究了离子质量和能量对分子残存率的影响。
短句来源
     Based on the isospin-dependent quantum molecular dynamics model, we have investigated the dependences of isospin fractionation degree (N/Z)_n/(N/Z)_(frag) on the mass and the beam energy of colliding system.
     利用同位旋相关的量子分子动力学理论 ,研究了中能重离子碰撞中同位旋分馏强度 (N Z) n (N Z) frag对于碰撞系统质量和能量的依赖关系 .
短句来源
     2) bettween the promotion of plowing quality and lowering energy consumption, the main object is the latter;
     (2)在提高犁耕质量和能量消耗方面,以降低能量消耗为主;
短句来源
     The experiments were conducted at 550℃ in argon atmosphere,and mass balance and energy balance were obtained with error no more than 10% and 15%,respectively. About 70%(mass) of solid residue,20%(mass) of condensate,and 10%(mass) of non-condensable gas were produced.
     结果表明:实验的质量和能量平衡误差分别在10%和15%以内,有效地回收了含油污泥中的挥发性有机物VOCs和半挥发性有机物SVOCs,气液固产物的质量比分别为10%、20%和70%,其中热解气体(含载气)的热值为11 MJ.
短句来源
     Some transient processes in sodium pool fire were modeled,including chemical reaction of sodium and oxygen; sodium combustion heat transter modes in several kinds of media;
     该程序模拟钠燃烧过程中钠和氧气的化学反应 ,钠燃烧热在各种介质中不同方式的传递 ,钠气溶胶的产生、沉积 ,以及在各种通风条件下多种介质的质量和能量交换等瞬态过程 ,描述了钠燃烧过程中各种特征参数随时间的变化。
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  mass and energy
Based on these calculations, the whole system efficiency calculation method that complies with the mass and energy conservation principle was established.
      
The mass and energy tend to shift from solid to liquid and gas phase (especially to liquid phase) during the process, and the optimum temperature for oil sludge pyrolysis is 500°C.
      
The territories of individuals for different representatives of aquatic animals, including fish, were calculated and their relationships with mass and energy potential of animals were established.
      
Gas discharge from a tube into a vacuum with unsteady mass and energy addition
      
We examine the problem of ideal gas discharge from a cylindrical tube closed at one end into a vacuum, with unsteady mass and energy addition.
      
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  quality and energy
Humidity of indoor air is an important factor influencing the air quality and energy consumption of buildings as well as durability of building components.
      
Limits to food intake and fiber utilization in the prairie vole, Microtus ochrogaster: effects of food quality and energy need
      
In order to study relationships between seston food quality and energy transfer between primary producers and herbivores, we conducted five microcosm experiments in Castle Lake, California, USA during the summer of 1996.
      
During the last ten years environmental quality and energy have emerged as important national issues right along with the economy.
      
'Technological optimism' is the doctrine that a growing number of technological improvements in such areas as food production, environmental quality and energy will sustain life as human population soars.
      
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The masses of nuclei from n to Ca~(41) have been derived from nuclear Q values exclusively, without recourse to mass spectrometric results, by an approximate least-squares adjustment. Main results are:

近年原子核反应能量(包括核衰变能)的精密测定的累积,使我们有可能单独从核反应能的测量来确定轻原子核的质量。本文用近似的最小二乘统计平差,由原子核实验数据得出从中子到Ca~(41)各同位素的原子量。主要结果如下: (1)由核反应能导出的、质量差2D~2-He~4的数值和质谱测定的比较,给质量和能量联系公式,E=mc~2,提供了最精确的实验证明。准确度为1/6000。 (2)从A=1到41一共79个同位素的原子量(表8),和统计平差后的Q值(表1)。这是现在由原子核转变的数据所能得到的,一组最可几的质量值。主要的质量是: n=1.008 9842(±17), H~1=1.008 1440(±17), D~2= 2.014 7381(±29), He~4=4.003 8732(±21), C~(12)=12.003 807(±5), S~(32)=31.982 188(±26), Ca~(40)=39.975 204(±39)。 (3)本文所得的结果显示作者所用的方法,在现阶段原子核实验知识的限度下,和全盘的最小二乘平差方法具有同样意义,达到同等的精密度,而手续较为简单有利,且便于发现实验结果中的系统偏...

近年原子核反应能量(包括核衰变能)的精密测定的累积,使我们有可能单独从核反应能的测量来确定轻原子核的质量。本文用近似的最小二乘统计平差,由原子核实验数据得出从中子到Ca~(41)各同位素的原子量。主要结果如下: (1)由核反应能导出的、质量差2D~2-He~4的数值和质谱测定的比较,给质量和能量联系公式,E=mc~2,提供了最精确的实验证明。准确度为1/6000。 (2)从A=1到41一共79个同位素的原子量(表8),和统计平差后的Q值(表1)。这是现在由原子核转变的数据所能得到的,一组最可几的质量值。主要的质量是: n=1.008 9842(±17), H~1=1.008 1440(±17), D~2= 2.014 7381(±29), He~4=4.003 8732(±21), C~(12)=12.003 807(±5), S~(32)=31.982 188(±26), Ca~(40)=39.975 204(±39)。 (3)本文所得的结果显示作者所用的方法,在现阶段原子核实验知识的限度下,和全盘的最小二乘平差方法具有同样意义,达到同等的精密度,而手续较为简单有利,且便于发现实验结果中的系统偏差。 (4)核反应能测定和最近质谱测定的比较表明,对于H~1,D~2,He~4的质量,这两种方法已经符合。至于C~(12)的质量,则仍有确定的差异;S~(32)和Ca(40)则两种测定差异较大,尚未一致。

The plow bottom surface has been studied variously and in a great quantity by the foreign and native researchers. This paper, in reviewing the past processes of those studies, discussed with regard to three problems, i.e. the theoretical problem in the designing of plow bottom surfaces, the methods of designing of plow bottom surfaces, and the problem of establishing a unified designing equation. The paper proposed at last an initial conception of further development of plow bottom surface studies, This conception...

The plow bottom surface has been studied variously and in a great quantity by the foreign and native researchers. This paper, in reviewing the past processes of those studies, discussed with regard to three problems, i.e. the theoretical problem in the designing of plow bottom surfaces, the methods of designing of plow bottom surfaces, and the problem of establishing a unified designing equation. The paper proposed at last an initial conception of further development of plow bottom surface studies, This conception includes: ( 1 ) The result of researches based on the furrow-slice movement on plow will be used as a starting point of further study;2) bettween the promotion of plowing quality and lowering energy consumption, the main object is the latter; 3) the purpose of the studies is to establish a unified designing equation, this equation should be able to optimize the designing, under conditions that the stub be covered and the furrow-slice be pulverized by action of plow and, being an objective function, the energy consumption(resistance) should be minimized; ( 4 ) in view of the state of current studies, the research work should be started from experiments, finding reasonable modeling of design and other experimental design methods, or studying the processes of plowing, attemptingto use soil-mechanics and hydro-mechanics theory; ( 5 )in order that the experimental research to be proceeded effectively testing techniques and equipments of urgent necessary are proposed.It is the view of this paperthat the various approaches of research started inthis country are not only acceptable but also necessary to promote the rapiddevelopment of research works.

中外学者对犁体曲面曾经进行过多方面的、大量的研究工作。本文仅就三个问题,即犁体曲面设计的几个理论问题,犁体曲面设计方法问题,和建立统一的设计方程问题,回顾了研究工作的进展,本文最后提出了我们进一步开展犁体曲面研究工作的初步设想。达个设想包括:(1)把建立在土垡运动基础上的研究成果,作为进一步研究的出发点;(2)在提高犁耕质量和能量消耗方面,以降低能量消耗为主;(3)以建立统一的设计方程为目标。这个方程应以残茬覆盖和垡片破碎为约束条件,以能量消耗(或阻力)最小为目标函数,实现优化设计;(4)鉴于目前的研究现状,研究工作应首先从实验研究入手,寻求合理的模拟设计方法和其它经验设计方法,也可尝试应用工程土壤力学和流体力学原理,进行犁耕过程的研究;(5)为使实验研究有效地进行,提出了一些急需的实验技术和实验装置的研制项目。 本文认为,目前国内已经开展起来的多种研究途径,不仅是可行的,对于推动研究工作较快地取得进展,也是非常必要的。

This paper persents a method for aerodynamic design calculation of axial gas turbine stage with the mixing of cooling air.The mass flow mixing and the energy mixing of the cooling air with the main gas flow are considered directly in the continuity and the energy equations,while the momentum loss resulting from the mixing is considered indirectly.The losses of blade rows and their distributions in the radial direction are determined by means...

This paper persents a method for aerodynamic design calculation of axial gas turbine stage with the mixing of cooling air.The mass flow mixing and the energy mixing of the cooling air with the main gas flow are considered directly in the continuity and the energy equations,while the momentum loss resulting from the mixing is considered indirectly.The losses of blade rows and their distributions in the radial direction are determined by means of the loss models provided in the paper.The influences of different cooling types of blades and the non uniformity of the inlet total temperature and total pressure in the radial direction have been considered in the calculation program.The method could be applied to multi stage air cooled gas turbine.The basic calculation method adopted is the streamline curvature method.As an example,a design calculation of an axial turbine stage are presented.The calculation results show that the effect of the cooling air mixing on the turbine efficiency is significant.

本文介绍的设计计算方法 ,直接计入质量和能量掺混 ,但间接计入动量掺混影响。计算程序可以计及涡轮进口沿径总温、总压不均匀的影响、叶片冷却型式不同的影响以及各计算节点的比热和气体常数不同的影响。叶列损失按给出的损失模型迭代求解。在轴向间隙站对混气采用流线曲率法求解径向平衡方程。本计算程序可以用于多级气冷涡轮设计

 
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