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Considering that the existing nonlinear flashover model only suits chamber with single opening,this paper presented a modified model which would be more widely applicable after revising the dimensionless parameters,based on analyzing the calculation methods for smoke neutral plane and outflow mass rate from compartment with multiply openings.

通过实验重现了汽油、柴油、酒精、聚乙烯和木垛的轰燃过程，发现不同液体燃料引发轰燃所需的最小火源面积正比于燃料的蒸发热，反比于燃烧热，轰燃发生时间会随着火源面积的增大而提前。

A new set of dimensionless nomogram characterized by two parameters and Reynolds number is used to improve the deficiency of the AG number.

实验上，我们模拟了一个五倍大的尿道模型，并配以不同阻塞程度，阻塞外型来做实验，并以计算流体力学验证之。

Magnetic permeability: The ratio of the magnetic induction B to the inducing field strength H; denoted by the symbol :=|B|/0|H| 0 is the permeability of free space = 4π 10-7 weber/ampere meter (or henries/meter) in the SI system and 1 gauss/oersted in the cgs system, so that the permeability is dimensionless.

磁导率 磁导率：磁感应强度 B 与源场强度 H 之比，用符号表示：=|B|/0|H|自由空间磁导系数 0 在国际单位制中为 4π 10-7 韦伯/安培米，在厘米-克-秒单位制中为 1 高斯/奥斯特。因此磁导率是无量纲的。

Firstly the dimensionless planar motion model of SGKW was established;then the optimal control problem of shortest time coplanar hit orbit was transformed into two-point boundary value problem by means of Pontryagin maximum principle .

首先建立了SGKW的无量纲化平面运动模型，然后利用庞特里亚金极大值原理将时间最短共面打击轨道的最优控制问题转化为两点边值问题。

According to the requirement of a minimum-fuel-consumption, a method of coplanar hit orbit optimization design for SGKW was studied. The dimensionless planar motion model of SGKW was founded, and the optimal control problem of minimum-fuel-consumption coplanar hit orbit was derived into two-point-boundary-value problem according to Pontryagin maximum principle.

针对燃料最省要求，研究了SGKW共面打击轨道优化设计方法，建立了SGKW的无量纲化平面运动模型，利用庞特里亚金极大值原理将燃料最省共面打击轨道的最优控制问题转化为两点边值问题。

Qualitative analysis of the influence of the strength of anisotropy,dimensionless latent heat,and noise factor on the shape of crystal growth is given.The results show that the velocity of principal branch growth increases as strength of anisotropy increases and the branch structure is very strongly dependent on strength of anisotropy;as ...

结果表明，枝晶主干生长速度随着各向异性强度的增大而增大，并且枝晶结构强烈依赖于各向异性强度；随着无量纲潜热的增大，晶体生长过程中枝晶结构特征愈加明显；扰动对枝晶结构特征有一定的影响，随着扰动因子的增加，枝晶间竞争生长加剧。

Absolute open flow is a important index of appraising oil/gas well production capacity,and often used in oil/gas well classification、proration and dimensionless parameters in other equations and so on,it denotes oil/gas productions under full openness of well bottom.

无阻流量是评价油气井生产能力的重要指标，也常用于油气井分类、配产和其它公式中参数的无因次化等，它表示井底在完全敞开的情况下油气井的产量。

The extent of the dendrite remelting can be described by the dimensionless superheating of the dendritic skeleton during recalescence.

重熔破坏趋势的大小可以用再辉时枝晶骨架的无量纲过热度来衡量。

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。

What are your goals and strategies for growth?

你的成长目标和策略是什么？

And unto the angel of the church in Sardis write; These things saith he that hath the seven irits of God, and the seven star I know thy works, that thou hast a name that thou livest, and art dead.

3：1 你要写信给撒狄教会的使者，说，那有神的七灵和七星的，说，我知道你的行为，按名你是活的，其实是死的。