查询词典 dimensionless quantity

Theequivalence percolation resistance law is accurate enough to be used in productivitycalculation of horizontal well pattern.(3) Productivity of mixed well pattern of horizontalwell or multilateral horizontal well and vertical well is constructed and formulae are simpleenough to be used in the oilfield. The patterns include 5-spot pattern,7-spot pattern and9-spot pattern.(4) Productivity formula of united rectangular well pattern of horizontaland vertical wells is constructed. By this formula, the calculation results show that fora horizontal well length, there is a shape factor at which the productivity of the patternis biggest. So optimum method of the well pattern is proposed.(5) A new concept ofdimensionless length of horizontal well is advanced and the relationship of optimum shapefactor of the rectangular well pattern against dimensionless length of horizontal well ispresented. The influences of length of the horizontal well, area of the well pattern unitand the thickness of reservior are concerned.

利用该公式计算表明：当水平井长度一定时，存在一个最优井网形状，使得水平井的产能最大，在此基础上提出了水平井井网的优化方法；(5)提出了水平井无因次长度的概念，给出了联合井网最优井网形状因子与水平井无因次长度的关系式，并对水平井长度、油层厚度及井网面积对产能的影响进行了分析；(6)推导出了一无限水平井井排在XY 平面内势的解析解，为不同水平井整体开发井网或水平井和直井井网整体开发渗流理论的研究奠定了理论基础；(7)建立了交错式水平井与直井整体开发渗流理论，给出了拟三维条件下井网产能的精确解析解及该井网最优井网形状因子与水平井无因次长度的关系，并对产能的影响因素进行了分析；(8)建立了水平井与水平井正排列井网、交错排列井网条件下渗流理论及井网产能在拟三维条件下的精确解析解，给出了交错井网条件下最优井网形状因子与水平井无因次长度的关系，通过与正方形井网对比，说明优化井网可大幅度提高开采效果；(9)建立了分支水平井和直井面积井网水油两相非活塞驱替条件下渗流问题的解析解，给出了见水前后无因次产量与无因次时间的关系式以及见水时间等。

Relative permittivity is the dimensionless ratio of the permittivity of a material to that of free space; it is also called the dielectric constant.

相对电容率为材料的电容率与它在自由空间的电容率的比值，无量纲；也叫介电常数。

Physical reality can be seen as grounded in the numerical values of a handful of dimensionless constants, the best known of which are the fine structure constant and the ratio of the rest mass of the proton to the electron.

自然实在被视为基于少数无量纲常数的数值，其中最有名的常数是"精细结构常数"和"质子与电子静止质量的比率"。

The forth part presents the experiments on fire area resistance and retroversion of fire smoke by using integrative fire simulation system of mine laneway network, with the results compared with the simulative numerical value, and the part also brings forward a new conception named fire area resistance which reflects character of fire resistance of mine laneway network. A general dimensionless calculation formula is deduced which presents the rule of smoke retroversion distance when fire occurs.

第四部分运用井巷网络火灾综合模拟实验系统进行了火区阻力和巷道火灾烟流滚退的实验研究，并与数值模拟结果进行了对比，提出了反映井巷网络火灾阻力特性的火区阻力新概念，推导出巷道火灾时期表征烟流滚退距离变化规律的通用无因次计算公式。

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 singularitiesinfinitely dense, dimensionless points with irresistible gravity.

他同数学家罗杰潘罗斯合作，运用爱因斯坦的相对论等式找到了新的计算方法来证明：在黑洞的中心是一堆密密麻麻的、无边无际的、具有巨大引力的奇异小点。

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·潘罗斯合作，运用爱因斯坦的相对论等式找到了新的计算方法来证明：在黑洞的中心是一堆密密麻麻的、无边无际的、具有巨大引力的奇异小点。

Work ing with mathematician Roger Penrose and us ing 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。潘罗斯合作，运用爱因斯坦的相对论等式找到了新的计算方法来证明：在黑洞的中心是一堆密密麻麻的、无边无际的、具有巨大引力的奇异小点。

Working with mathematician Roger Penrose and using Einsteins 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·潘罗斯合作，运用爱因斯坦的相对论等式找到了新的计算方法来证明：在黑洞的中心是一堆密密麻麻的、无边无际的、具有巨大引力的奇异小点。

Working with mathematician Roger Penrose 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·潘罗斯合作，运用爱因斯坦的相对 www.8t t t8.com 论等式找到了新的计算方法来证明：在黑洞的中心是一堆密密麻麻的、无边无际的、具有巨大引力的奇异小点。

Working wit h mat h ematician Roger Penrose and using Einstein's relativity equations, h e developed new tec h niques to prove mat h ematically t h at at t h e h eart of black/ h oles were singularities—infinitely dense, dimensionless points wit h irresistible gravity.

他同数学家罗杰·潘罗斯合作，运用爱因斯坦的相对论等式找到了新的计算方法来证明：在黑洞的中心是一堆密密麻麻的、无边无际的、具有巨大引力的奇异小点。

The system can be widely used in belt weighing and batching process control,etc.

介绍了基于智能模糊控制的嵌入式配料系统的设计方法，对模糊PID控制过程和系统调零作了重点的讨论，同时给出了PID控制的程序流程图和系统定长调零子程序。

"I dunno," she answered,"but if you show me aroun', I'll recognize it from the lighthouse just outside the porthole."

"我不知道，"她回答说，"如果你能带我转转，我能认出来的，因为灯塔就在舷窗外。"