by establishing the mathematical model of air flow, this paper introduces air dynamic theory and energy conservation principle of natural ventilation in the long and narrow sewer tunnel in winter.

based on the mass conservation principle, the production formula of semi-spherical flow for pseudo-pressure, pressure-squared and pressure are derived in this paper.

本文基于半球形流的特点，利用质量守恒原理，通过推导得到了由拟压力、压力平方和压力一次方表示的产量公式。

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based on energy conservation principle, mechanical models of immediate roof in different stage have been established, the stability criterion of immediate roof has been derived.

基于能量守恒原理，建立了二次沿空留巷不同阶段直接顶的力学模型，推导出沿空留巷直接顶的稳定性判据。

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by aid of structural damp theory, the integral damping ratio of the composite structures which include two different materials are derived according to energy conservation principle.

从结构阻尼理论出发，根据能量守恒原理，推导了由钢筋混凝土和钢结构组成的组合高耸结构的整体阻尼比。

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based on the energy conservation principle and the paraxial ray tracing method, the peacock eye zone plates are designed and encoded.

基于能量守恒原理，利用追迹法、计算机编码设计了用作长焦深元件的孔雀眼波带片。

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according to the momentum conservation principle, we obtained the dynamic equations of the system which is linearly dependent on a group of inertial parameters.

根据系统动量守恒关系，得到了与系统惯性参数呈线性关系的系统动力学方程。

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the relationship between the fracture mechanics parameters k_c and k_ ( ic) basing on the energy conservation principle

基于能量原理的断裂力学参数K c与K（IC）之关系

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based on the information conservation principle, the federated kalman filtering algorithm was deduced and its optimization was demonstrated.

基于信息守恒原则，推导出联邦kalman滤波算法并完成最优性证明。

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the equation of a spacecraft with solar arrays are obtained by using the conservation principle of momentum.

利用动量矩守恒原理导出带太阳阵航天器的动力方程，指出了系统的非完整约束性质。

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based on the phase transition theory and the energy conservation principle, the expression of frozen ratio is derived.

基于水–冰相变理论和能量守恒原理，得出冻结率表达式。

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numerical simulation of earth's gravitational field recovery from sst based on the energy conservation principle

基于卫-卫跟踪观测技术利用能量守恒法恢复地球重力场的数值模拟研究

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considerations on the appropriate application of conservation principle

关于稳健原则适度应用的思考

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analysis of energy conservation principle based on the technology of high voltage frequency conversion speed regulation

高压变频调速控制节能原理分析微机控制变频调速水泵恒压供水系统

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conservation principle and method of germplasm resources of forest trees

GB/T14072-1993林木种质资源保存原则与方法

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this dissertation proposed the power component cost flow conservation principle as the fundamental of transmission cost analysis.

论文提出以功率分量费用流守恒原理为输电经济成本分析的经济准则。

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system tracts were also identified within each sequence based on the maximum flooding surface and fault-break (first flooding surface) .

进而依据最大湖泛面和断裂坡折带（首次湖泛面）对三级层序进行了体系域划分。

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the transgressive system tract consists of delta plains, and the maximum flooding surface lies in black mudstone and coal.

水进体系域为三角洲平原沉积，最大湖泛面位于湖侵的黑色泥岩与煤线的互层中；

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to this end china has successively promulgated and implemented the" food labeling regulations," "pre-packaged food labeling general" and other laws, regulations and mandatory standards to regulate food labeling identification mark.

为此我国相继颁布实施了《食品标识管理规定》、《预包装食品标签通则》（GB7718）等法律法规和强制性标准，以规范食品标签的标识标注。

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we've also tried pre-packaged items from oems like airbus, but because we manage such a big fleet of aircraft, we use our own databases to plan what we need well ahead.

该公司还努力从OEM诸如空客公司获取“预先工作包”项目，由于机队相当庞大，该公司使用自己的数据库提前量身定做切合实际的计划。

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the caching pattern is based on the ability to extend the pre-packaged websphere esb mediation primitives, and the article includes an overview of how to develop your own mediation primitives.

该缓存模式基于扩展预先打包的WebSphere ESB中介原语的能力，本文将概述如何开发您自己的中介原语。

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if you're using a pre-packaged system off the shelf, you probably won't run into very many shared library versions& the system probably just ships with the ones it was linked against.

如果您正在使用现成的预先包装好的系统，那么您可能不会遇到太多的共享程序库版本&系统可能只附带它要链接的那些共享程序库版本。

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