查询词典 dimensionless quantity

Working with mathematician Roger Penrose and using Einstein's relativity equations, he developed new techniques to prove mathematically that at the heart of black/holes were singularities-infinitely dense, dimensionless points with irresistible gravity.

他同数学家罗杰。

The influence on dimensionless coefficients of inlet velocity is analyzed. The experiential relation of separation efficiency benefiting the experiments is obtained.

本文还对进口速度对无量纲参数的影响进行了分析，并根据实验数据进行多元线性回归分析，获得了可以指导实验的波形板分离效率的无量纲经验公式。

Snow to have goose hair heavy snow outside, in succession satisfied several days, the dimensionless cornfield overlays under very thick ice snow, doing of softhearted dream.

外面下起了鹅毛大雪，纷纷扬扬了好几天，无边无际的麦田覆盖在厚厚的冰雪之下，做着的温情的梦。

The dimensionless equations are obtained by using stream function.

采用以流函数表示的无量纲基本方程，用控制容积法对方程离散化并进行了分析计算。

Analysts believe that Wall Street investment bank loan crisis dimensionless damage to its property or sold in China to ease the immediate difficulties, may not be completely empty of China real estate market.

分析人士认为，华尔街投行因次贷危机遭受重创，其出售在华物业或为缓解眼前困境，可能并非完全看空中国房地产市场。

The calculation results show that the hydrodynamic forces of purely heaving and pitching and its dimensionless frequency presente better linearity relation, and which indirectly verifies that this calculation method can be used to calculate the hydrodynamic coefficients of complicated shape submergible vehicle.

计算结果表明，纯升沉运动和纯俯仰运动的水动力与运动无因次频率呈现较好的线性关系，间接验证了所提出的计算方法适用于复杂外形潜器的水动力系数计算。

The simulation is carried out with the excitation frequency relative to the natural vortex-shedding frequency from the corresponding stationary cylinder taking values in the range which stands for sub- and superharmonic excitation and the oscillation dimensionless amplitudes. Change of these parameters and Reynolds number will lead to the mode synchronization and mode competition and the switching between different vortex shedding modes.

对振动频率和静止圆柱旋涡脱落频率比在一定的超谐和亚谐范围、一定的无量纲振幅范围和不同的雷诺数都作了模拟，发现随这些参数变化将产生旋涡脱落模式的同步、竞争和相互转化现象。

A physical model describing the heat and mass transfer processes of the evaporating thin film is set up and an evolution equation which shows the development regularity of dimensionless film thickness with time is obtained from the liquid vapor interfacial conditions.

论文对平面蒸发薄液膜的传热传质过程建立了物理模型，从汽液界面上的边界条件得到无量纲液膜厚度随时间变化的发展方程。

The research works are listed as followings: 1. The computing method developed with the Matlab software has been proposed to solve transcendental equation containing elliptical integral. With this method the dimensionless contact parameter, contact stress and deformation in different ceramic materials have been computed for the first time, and its the efficiency and reliability has been proved. 2. The internal speed and motions of ball bearings as well as relevant quasi-statics formulae are conducted.

本文以轴承拟静力学分析为理论基础，围绕着轴承的数字化设计和高速陶瓷球轴承的结构参数进行了相关研究，主要内容如下：提出基于软件Matlab为平台的计算方法，首次得到了不同陶瓷材料的接触应力和变形等以前不易计算的数据，验证了这种方法具有简便可靠、适合于轴承计算、易于普及等优点。

The coefficient V can be named as the dimensionless layer flowing factor, means the ratio of surface coefficients irrespective of production over the total surface coefficients among the maximum surface coefficients under the condition of unideal flow. Obviously, 1-V represents the ratio of the surface coefficients relating with production rate over the total surface coefficients.

系数V可称为无因次层流系数，它表示在所有非理想流动条件下的最大总表皮系数中，与产量无关的表皮系数所占的份额，对应的1-V则是代表与产量有关的表皮系数所占的份额。

The United Kingdom has pledged to provide technical assistance to the peacekeeping effort in Darfur, including airlifting supplies and equipment to assist the African peacekeepers.

英国承诺为达佛的維和努力提供技术帮助，包括提供非洲的維和部队空运补給和裝备。

Results: The level of ET-1mRNA in placental villus was significantly higher in pre-eclamptic women than that in control group.

结果：妊高征组患者胎盘绒毛组织ET-1 mRNA的表达较正常妊娠组明显增高。