公式的

But in practical application, the results of calculation usually have a greater difference from reality, which are mainly the following several points: it is thought that single-phase to flow for fluid in the formula, and multiphase flow exists actually; also the impact of the pressure drop in horizontal section and the wellhole completion forms on the deliverability are not included, as well as the bottom water coning is a complex question affecting well deliverability.

但在实际应用中，计算结果与实际往往存在较大的差别，其原因是：公式推导中假设流体流动是单相流动，而实际地层往往是油水两相流动；公式中没有考虑水平井筒内压降的影响；不同的完井方式所对应的表皮系数不同，对产能影响也较大。

Through analyzing problems existing in calculation formula of natural ventilation volume required for eliminating work-shop rest heat when hot workshop is ventilated locally via workshop internal heat balance and air balance,it deduced out rational for-mula and discusses associated aspects.

分析了热车间内进行局部排风时消除车间余热所需自然通风量计算公式中存在的问题，通过车间内的热平衡和空气平衡，推导出了合理的公式，并进行了一些有关方面的探讨。

First, the mixing rule of temperature calculation equation was modified. The content and acentric factor of second component were introduced into the interaction parameter, and a new equation of critical temperature for mixture were set up as

对二元体系临界温度计算公式中的混合规则进行修正，首次将组成和表示物质结构的偏心因子引入其中，建立了温度相互作用参数的表达式和新的二元体系临界温度计算公式。

Comparing the formulas obtained in this paper with Atabek' s formulas it may be seen thatthe foimer is simpler and more convenient.

它们较之Atabek等人推导的公式更为简明和易于计算。并且，在相同的条件下简化为形成流动的表达式后，两者的公式完全一致。

This paper introduces the approach to calculating mould taper and its appropriate corresponding casting speed according to the contraction of molten steel in mould, which can establish much more specific calculation formulae and breviate former ones.

摘 要 文中提出了通过钢液在结晶器中的收缩量计算结晶器锥度及其较好配合拉速的方法。建立了更为明确的计算公式，简化了以往的经验公式。

In this thesis,the quantitative analysis mode of the comparative value is put forward that non-circulation share holder should pay for the circulation shareholder,then the formula to calculate shrinking-rate and connotive non-circulation value coefficient are set up.

在提出非流通股股东向流通股股东支付对价的定量分析模型的基础上，推导出计算缩股率与内含非流通股价值评估系数的公式和缩股率与等价送股率的转换公式，并进行实证分析。

The evaluation method and algorithm of shape error (roundness, plane straightness, space straightness, cylindricity) were discussed. A new kind of algorithm, namely mesh searching method, which can be used to evaluate the roundness error, plane straightness error, space straightness error and cylindricity error, were put forward. With this algorithm, the shape error can be obtained by transferring the distance formula repeatedly and simple judgment without linearzing the distance formula (from point to point or point to line) and choosing optimal direction and step length.

对形状误差(圆度、平面直线度、空间直线度、圆柱度)的评定方法及算法进行了讨论，提出了一种评价圆度误差、平面直线度误差、空间直线度误差及圆柱度误差的新算法——网格搜索法，该算法不需要对距离公式线性化，也不需要选定优化方向和优化步长，只需重复调用距离公式和简单的判断即可得到符合定义的形状误差。

So far the design of ejector has been carried out with various semi-experiential formulas based on one-dimensional isentropic hypotheses, the ejector structure being definitely determined by its work conditions.

目前喷射器的设计一般是根据工作参数来确定具体的结构，采用的计算公式多为一维等熵假设基础上的半经验公式。

In this paper,we study the period of the processing of the multi-input series production lines using the method of max algebra ,the computational algorichm of production period for multi-input production lines and a batch of produetion on nonblocking are given.

利用极大代数方法讨论了多入口串行生产线的生产周期问题，给出在无阻塞控制下的多入口串行生产线生产周期的计算公式及其批量加工生产时的周期公式。

In this paper, a nounal test with table L9(34) has been ed for a new type of flap rudder s, and put forward some regression formulae of hydrodynamic performance,such as rudder normal force derivahve fa, the critical angle of attack ah and rudder nounal force coefficient CN, these formulae had been validated by the flap rudder in 9000t cement - carrier ship.

本文通过对新型襟翼舵舵模的L9（34）正交试验研究，给出一套包括襟翼舵法向力导数fα、临界攻角α和法向力系数CN的回归公式，并经9000吨自卸式水泥船新型襟翼舵舵力试验验证，表明计算公式对同类型的襟翼舵是完全适用的。

In the United States, chronic alcoholism and hepatitis C are the most common ones.

在美国，慢性酒精中毒，肝炎是最常见的。

If you have any questions, you can contact me anytime.

如果有任何问题，你可以随时联系我。