This paper discusses the quantum chemistry ab initio calculation method and some semi-empirical calculation methods frequently used on the electronic structure.
对电子结构计算中常用的量子化学从头算方法及几种量子化学半经验计算方法进行了讨论。
These equations are very important for engine parameter calculation in missile flight test, The empirical calculation equations of main engine parameter and error are derived.
就发动机主要参数及误差的经验计算公式进行了推导和确定。
Poulos-Davis-Randolph (PDR) Method is a empirical calculation method. It is easy to compute the relation between the number of piles and the average settlement of the foundation.
PDR法是计算沉降控制复合桩基的一种经验方法，它在一定程度上考虑了桩的非线性和桩—土—筏的共同作用。
Calculation shows that the viscosity model based on pr state equation has big error, while LBC empirical relationship can provide more accurate viscosity of acidic gas.
通过计算比较发现，基于PR状态方程的粘度预测模型误差较大，而LBC经验关系能较准确地确定酸性气体的粘度。
Compared with empirical formulae from experiments at home and abroad, the calculation method is proved to be correct.
与国内外试验得到的经验公式进行对比，验证该计算方法的正确性。
Theresults of this study change the empirical formular used in natire cement compounding, and establish a new calculation method.
本课题的完成，改变了国内水泥配料沿用的经验公式方法，建立了一种崭新的水泥配料计算方法。
The oil evaporation loss rate in this kind of tanks is determined by measuring gas at the time of major breath or making calculation using the empirical data accumulated in refineries.
为确定该内浮顶罐的降低油品蒸发损失效率，采用量气法测定其大呼吸时的蒸发损失量，而小呼吸的损失则按炼油厂的实践积累的经验数据进行计算。
Gas deviation factor being a very important parameter in gas engineering calculation was calculated by use of empirical formulas in general.
天然气偏差因子是天然气工程计算中一项相当重要的参数，该参数普遍采用相关经验公式计算。
Beginning with the prescribed wake model, a Semi Empirical Correction for the vortex core effect on rotor wake is made and free wake calculation is carried out.
首先从预定的广义尾流入手，并引入尖涡涡核作用的半经验修正，对旋翼的自由尾流进行计算分析。
And the calculation results with the empirical formula calculation results are compared with simulation results and empirical formula calculation results.
并将计算得到的结果与经验公式计算结果进行了对比，模拟结果与经验公式计算结果相吻合。
Calculation of empirical frequency and selection of frequency distribution model form two most important segments in the formula of urban stormy statistics.
城市暴雨公式统计中最重要的两个环节就是经验频率的计算和频率分布模型的选择。
In empirical formula is presented for the calculation of the bifurcation discharge ratio with the effect of the river training works taken into consideration.
根据试验结果，文中还提出了本河段整治后分流比计算的经验公式。
Lack of quantitative calculation, there are limitations of empirical method in practical application.
由于缺乏量化的计算，经验方法在实践应用中存在较大的局限性。
The fact proves that these empirical formulas have advantages of easy calculation, wide applications, high reliability and less error rate.
实践证明，所列的公式具有计算方便、实用性强、可靠性高、误差率小的优点。
Through compared the trial results with calculation results by empirical equation, modified equation is given. The reliable evidence is provided for design of actual blasting engineering.
同时把试验结果与经验公式计算结果进行了对比，得出了修正公式，为实际工程应用提供了可靠依据。
Firstly, combined with McCaffreys empirical formulas for plume entrainment, the calculation method of heat release rate of the fire source is discussed;
首先，结合羽流卷吸经验公式，讨论了火源释热速率的计算方法；
This paper present the analytical method for structural load calculation for SWATH ship, and the short cut method with empirical formula for preliminary design.
本文提供了小水线面双体船(SWATH)结构载荷的解析方法以及用于初步设计的简捷算法经验公式。
There are no rules to follow in the calculation method for designing peak flow in river confluence reaches. There are some simple empirical approaches frequently-adopted in engineering works.
河流交汇处设计洪峰流量的计算方法无规范可循，工程上常采用一些简单的经验处理方法。
The empirical formula and calculation parameters can be used in design of post grouting man power mine pile on the same geological type with reference value.
应用的经验公式及其计算参数可供同类型地质的后压浆人工挖孔桩的设计参考。
An empirical formula, which greatly simplifies the calculation for long-term camber of prestressed concrete members was presented.
提出了一个经验公式，大大简化了预应力混凝土构件长期反拱的精确计算工作。
By comparing with the empirical value of the actual engineering practice, revision was made in settlement calculation by JCCAD to make foundation design more reasonable.
结合地区经验对JCCAD沉降计算值进行修正，使基础设计更加合理。
A model is developed for the calculation of the initial rotor tip vortex core radius aiming at eliminating the empirical parameters of the tip vortex in rotor free-vortex wake analysis.
建立了一个旋翼桨尖涡初始涡核半径计算模型，用于消除旋翼自由尾迹分析中桨尖涡涡核半径依靠经验设定的现状。
Using Darcy-equation to calculate friction loss is more convenient, but using the comprehensive equation can improve calculation precision. A empirical method of dealing with pump station boundary…
用列宾宗公式计算摩阻。可以提高计算精度。对长输管道中间泵站边界条件，给出了经验处理方法。
It is very easy to apply this optimization approach to various semi-empirical and ab initio molecular orbital calculation.
该法容易应用到各种半经验的和从头计算量子化学的方法中去。
The empirical unit consumption of explosive under special conditions is considered as a proper blasting strength, from which the calculation formula for the blasting of cylindrical charge is derived.
再把特定条件下的经验单耗视为合适的爆破作用强度，从而导出柱状药包爆破的计算公式。
The results of numerical calculation compared well with test data, as illustrated that this semi-empirical and semi-theoretical formula for predicting the bore pressure is feasible.
通过计算结果与实测结果对比，基本一致，说明用此半经验半理论公式预测涌潮压力是可行的。
After the theoretical conclusions we will do some empirical analysis or calculation, but the value of empirical studies will be limited by the China's data of stock and bond prices.
然后在理论的一般结果基础上进行实证分析，由于中国股票和债券资产数据的有限性，实证方法上还会采用数值计算的方法得出一些具有参考价值的验证结果。
Before the empirical analysis, the calculation of human capital stock and physical capital stock are needed.
在进行实证分析之前，需要先对人力资本和实物资本的存量进行估算。
Before the empirical analysis, the calculation of human capital stock and physical capital stock are needed.
在进行实证分析之前，需要先对人力资本和实物资本的存量进行估算。
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