根据气体炮的工作原理和特点，建立了其内弹道数学模型，推导了实用的气体炮内弹道方程的解法。
Based on the principle and the characteristics of the gas-gun, the mathematical model of the interior ballistic is constructed and the practical interior ballistic equations of gas gun are derived.
因此对该类问题的研究提供了新的实用的数值解法和数值分析方法。
Therefore, a new and functional numerical method and quantitative analysis method are provided.
介绍用图解法设计排洪沟的实用经济断面，此法可达到快速、优化设计的目的，并且具有通用性好，形象直观的特点。
It introduces a diagram method for design of flood discharge trench utility section, which is more universal and vivid and can attain the goal of quick& optimized design.
根据上述解法，还提供了实用的计算机通用程序。
According to this analytical method, a general computer program is developed for practical use.
结论改良碱裂解法操作简单、实用，所得样品纯度高，达到了分子生物学常规实验的要求。
We can get high purity of sample DNA by this simple and practical new method, it can meet the requirement of routine molecular biochemistry experiments.
而直接法、裂解法和还原法因其成本低廉，产率高，便于连续化生产，具有工业实用价值。
However, the direct process, cracking method and hydrogenation of chlorosilanes were valuable because of less cost, high yield and convenience of continuous manufacturing.
用轨迹图解法设计凸轮曲线是有效而实用的。
It is effective to design CAM curves with the method of locus and graphic.
与普通的试算法、正规方程法、规划求解法等数解法及图解法相比，该算法具有良好的收敛稳定性、方便实用性及较高的计算精度。
By contrast with trial method, normal equation method and plan solution method, present solution has good convergence stability, practicability and higher calculation accuracy.
文中重点讨论了具有工程实用价值的引入了透射边界的频域有限元解法。
Emphasis in the discussion is put on presentation of finite element method in frequency domain, in which transmitting boundary has been adopted.
该软件采用先进的网络新分解法，速度快、收敛稳定、可靠性高、具有很高的实用价值。
This simulator has used new network tearing algorithm and shown fast and stable convergence and more reliability. It is of great value for practical purposes.
该软件采用先进的网络新分解法，速度快、收敛稳定、可靠性高、具有很高的实用价值。
This simulator has used new network tearing algorithm and shown fast and stable convergence and more reliability. It is of great value for practical purposes.
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