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simulation     
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  相似匹配句对
     3-D simulation.
     三维计算机仿真模拟。
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     3.simulation;
     3.情景模拟型实验 ;
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  simulation
This approximation method is used to develop a simulation method of the sample path of linear fractional stable motions.
      
An application to simulation is presented where an associated Fast Wavelet Transform-like algorithm plays a key role.
      
A great number of digital computer simulation experiments have shown the obvious advantage of the new algorithms.
      
The performance of simulation shows that the estimations are highly satisfactory.
      
By Monte Carlo simulation-based approximations of the objective function and its first (second) derivative, an inexact Lagrange-Newton type method is proposed.
      
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A seale model investigation of surface runoff hydrographs for a small watershed with impermeable surface was carried out in a indoor laboratory. Hydrographs at the watershed outlet due to rainfalls of difforent durations and intensities were obtained experimentally. These results were used to check the unitgraph theory.The findings derived from experimental data are: 1.The duration of surface runoff for all uniform-intonsity storms of the same length is not constant,but somewhat varies with the intensity of...

A seale model investigation of surface runoff hydrographs for a small watershed with impermeable surface was carried out in a indoor laboratory. Hydrographs at the watershed outlet due to rainfalls of difforent durations and intensities were obtained experimentally. These results were used to check the unitgraph theory.The findings derived from experimental data are: 1.The duration of surface runoff for all uniform-intonsity storms of the same length is not constant,but somewhat varies with the intensity of rainfall. 2.In cases,the rainfall duration is equal or longer than the time of concentration of the watershed,the configuration of unitgraphs remain unchanged in essential char- acteristics. 3.In cases,the rainfall duration is shorter than the time of concentration,the re- sultant unitgraphs are not similar in configuration;the unitgraph theory is not verified. 4.The stale model experiment method for hydrological investigation,although far from perfect in hydraulic simulation and experimental technique,is considered as a new and fruitful approach for further efforts.

为了研究表面径流过程线,我们采用一座象小流域表面不透水的比例模型,建造在室内实验室里。自记水位计安放在流域的出口处,合适地以不同的降雨历时和强度做试验,这种结果用来检验单位线理论。从试验的资料推论发现:1.所有一定强度的暴雨,地面径流历时的长短不是不变的,但是随降讯强度的变化不大。2.在降雨时间等于或大于流域的汇流时间的情况下,单位线的形状存在基本上不变的特征。3.在降雨时间短于汇流时间的情况下,结果单位线的形状不相似,单位线的理论不成立。4.为水文研究比例模型试验的方法,虽然在水力相似和试验技术不十分成熟,是新的事物,有待今后更进一步的努力。

1. Using electronic simulation for determining the chromatographical elution curve and the conclusions of previous authors, a general equation for the rule of material movements in partition chromatographic columns is obtained. The equation emphasizes the influences of the feeding time, the causes of a symmetry of the elution curve, and of the variation of the retention time, which seemed to be neglected by previous authors.

1.从电模拟法考察色譜的流出曲綫以及归納前人工作,对物貭在分配色譜柱中的运行規則,提出一般方程。这方程着重进料时間的影响,流出曲綫不对称以及保留时間变化的原因。在各种指定条件下,該一般方程能还原成前人所获得的各种結果,并且該方程計算的結果与电模拟計算的結果一致。 2.从所提出的一般方程出发,导出区域牛寬度和保留时間变化的方程,并用一般方程、实驗、电模拟法等驗証了这些方程。 3.由所得出的区域牛宽度及保留时間变化方程,建立判断色譜柱选择性能及分离程度的指标,并用这指标对色譜操作条件的选择进行討論。

On the basis of new facts and laws revealed by modern astronomy and physics, it seems necessary and expedient to introduce the concept of "cos- moscopic" process, to stand side by side with macroscopic and microscopic processes. Cosmoscopic objects differ from macroscopic objects (things seen everday on the Earth as well as meteoric bodies, small asteroids and satellites) in mass and scale just as much as the difference between macroscopic objects and microscopic objects. Gigantic difference in quantity leads...

On the basis of new facts and laws revealed by modern astronomy and physics, it seems necessary and expedient to introduce the concept of "cos- moscopic" process, to stand side by side with macroscopic and microscopic processes. Cosmoscopic objects differ from macroscopic objects (things seen everday on the Earth as well as meteoric bodies, small asteroids and satellites) in mass and scale just as much as the difference between macroscopic objects and microscopic objects. Gigantic difference in quantity leads to marked difference in quality. The mechanical motion of celestial bodies, the dynamics of stellar systems, the condensation of self-gravitating gas mass, natural ther- monuclear reactions in stellar interior, the production of forbidden lines in nebulae and outer envelopes of stars, the strong coupling between hydrody- namic phenomena and electromagnetic phenomena, the existence of superdense matter, curvature of space in strong gravitational field, the evolution of celes- tial bodies, all these are examples of cosmoscopic phenomena and processes, and also form the basis on which the cosmoscopic concept is introduced, Stellar dynamics, cosmical electrodynamics, and general theory of relativity are examples of cosmoscopic laws. In cosmoscopic processes, gravitational interaction usually plays a dominant role, and plasma state is the state of matter most often met. The cosmoscopic concept will aid tn understanding more deeply material processes in the inorganic world. It will prevent us from applying without modification to cosmoscopic processes natural laws which strictly speaking applies only to macroscopic processes. Once the cosmoscopic law is understood, man can then create artificially cosmoscopic conditions on the Earth so that processes which only take place naturally in cosmoscopic processes, can then take place on the Earth. Thermonuclear reactions, forbidden lines (now applied so much in "Excited emission") are two examples; artificial cosmic rays, and artificial superdense matter might be realized later. In carrying out simulation experiments, the effect introduced by difference in scale and mass must be kept in mind. Differentiation among cosmocscopic, macroscopic, and microscopic processes shows that dialectical laws operate everywhere in Nature.

根据现代天文学和物理学的研究结果,有必要在微观和宏观之外建立宇观这个概念。宇观客体和宏观客体在量质和尺度方面的差别不亚於地上常见的宏观客体和微观客体的差别。量的巨大差异导致质的显著不同。天体的机械运动,恒星系统及其成员的运动,质量和体积都很大的气团由於自吸引而产生的凝聚,恒星内部的天然热核反应,星云和恒星外壳中禁戒谱綫的产生,流体运动同磁场的强耦合,天然超密物质的存在,强引力场中空间的弯曲,和天体的演化,这些都是宇观现象和宇观过程的具体例子,也是提出宇观概念的科学依据。星系动力学,宇宙电动力学,广义相对论等是宇观过程规律的例子。在宇观过程中,万有引力常起重要的作用,而等离子态是最普遍的物态,宇观概念将帮助我们更深刻地认识无机界的物质过程。它将使我们不致於把只适用於宏观过程的规律不加改变地就用於宇观过程的探讨上。在掌握了宇观规律的基础上,可以在地上用人工方法创造宇观条件,使那些只有在宇观条件下才能够天然地发生的过程,如热核反应,禁戒谱綫,物质的高度密集,宇宙綫等,在地上也能发生。进行模拟实验时应当注意质量和尺度的差异所引起的质的不同。宇观、宏观、微观的区别说明了辩证规律在自然界中处处在作用着。

 
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