Based on the takeoff safety criterion, a ski-jump model was developed to predict a land-based ski-jump takeoff performance for a fixed-wing aircraft. 建立了微下冲气流影响下的飞机运动的数学模型,用数值方法分析了微下冲气流对飞机滑跃起飞的影响。
Safety Criterion of Blasting Vibration for Existing Tunnel in Close Explosion Source 近爆源的既有隧道爆破振动之安全判据
Research on Blasting Seismic Safety Criterion Based on Wavelet Packets Equivalent Energy Technique 基于小波包折合能量法的工程爆破地震安全标准研究
Therefore, the dynamic portfolio model based on investment chance and/ or safety criterion can be conveniently applied to the practice of investment decisions and management. 因此,基于投资机会和/或安全准则的动态投资组合模型可方便地应用于投资决策与管理的实践中。
WS-Security is a kind of safety criterion basing on SOAP, which resolves such problems much better, for example, digital signature, information encryption and identity validation. WS-Security是一套基于SOAP的安全规范。它很好的解决了数字签名,信息加密和身份验证等问题。
Safety criterion for pressure wave 压力波的安全标准
On several problems of safety criterion for blasting vibration 关于爆破震动安全判据的几个问题
Monitor and Control of Safety on Houses under the New Safety Criterion of Blasting 新爆破安全判据下房屋安全的监测与控制
On frequency index of blasting safety criterion 浅析爆破安全判据的频率指标
The safety criterion for the porous bodies under biaxial loading can be gotten from this model, which is not dealt with or difficult to do by other relative theories, such as Gibson-Ashby model. 而由本理论体系可得出对多孔体双向承载条件的安全性判断,这似乎是Gibson和Ashby的有关模型理论所未触及或难以做到的。
Discussion for Safety Criterion of Substation Grounding Systems 对变电所接地网安全判据的探讨
Discussion on the safety criterion of blasting vibration considering the effect of vibration frequency 考虑振动频率的爆破振动安全标准的探讨
In order to solve the problem of track safety management, the allowable safety criterion of the track geometric irregularities, which have not yet been determined so far, are evaluated in this paper based on the analysis of vehicle/ track coupling dynamics. 为尽快解决轨道的安全管理,本文对至今尚未被确定的轨道几何不平顺的安全限值,从车辆-轨道系统耦合动力学方面进行了分析。
Frequency-spectrum analysis of pressure waves and the safety criterion for gun charges 膛内压力波频谱分析与装药安全性准则
To ensure safety and steady of the rock wall during the period of blasting excavation, a safety criterion for controlling the blast vibration effect determined by experimental study is described in this paper. 为了确保在爆破开挖过程中中隔墩的安全与稳定。在试验与研究的基础上,确定了爆破振速控制的安全判据。
The characteristics of blasting engineering in excavating high rock slope and protection layer, the technique measure, safety criterion and controlled standard are discussed. At the same time the application of blasting techniques in demolishing cofferdam and the slide blasting technology for dam construction are analyzed. 论述了水电工程爆破面临的高边坡,保护层开挖的工程特点,技术处理措施和应采用的安全判据和控制标准,并探讨了爆破技术在围堰拆除和滑动爆破筑坝工程中的应用。
The author gives a complete analyses on its basic theory, classification of structure strength of ship, wave load forecast, structure analysis technology, safety criterion for structure strength, fatigue strength, reliability analysis, and prospect of the structure strength research, etc. 在基本理论概述、船舶结构强度分类、波浪载荷预报、结构分析技术、结构强度安全性的衡准、疲劳强度、可靠性分析及结构强度研究的展望等内容作了全面的论述。
Determination and evaluation of safety criterion for ground vibration from blasting 深孔爆破振动安全判据的确定与估算
Development of chemical tankers, characteristics of their hull construction and safety criterion is discussed. 该文介绍了化学品运输船的发展历史和结构设计特点及安全规范。
The Toughness Safety Criterion of Production Casing in Perforating 油层套管射孔开裂的安全韧性判据
The result demonstrates that the minitype liquid metal reactor can reach the reactivity balance and the control rod system satisfies the demand for nuclear safety criterion. 计算结果表明,控制棒的核设计满足核安全要求,微小型液态金属反应堆的反应性能够达到平衡。
The development of safety criterion on blasting vibration effect 爆破地震效应安全判据的发展
Simultaneously, the safety of adjacent constructions in the process of tunnel blast excavation based on the monitoring result is analyzed to provide corresponding safety criterion. 同时对隧洞爆破开挖过程中邻近建筑物的安全,根据实际监测成果作了进一步分析,给出了相应的爆破安全判据。
Elementary study of safety criterion for blasting vibration 爆破地震动安全判据的初步探讨
Influence factors of blasting vibration on safety criterion for the freshly placed foundation concrete 新浇基础混凝土爆破安全标准的影响因素研究
The action of frequency to the vibration is analysed in the paper, and the new safety criterion considering the effect of frequency is suggested using the fractal theory. 文中在分析爆破振动频率对爆破振动的作用后,运用分形理论对其进行定量计算,得出考虑振动频率的爆破振动速度安全判别标准。
This courses two basic problems: First, in the condition of the same safety criterion, whether safety investment and consumption can be as low as possible? Second, in the condition of limited safety investment, whether safety realization can be as great as possible? 这就引起两个基本问题:第一,在满足同样的安全标准的条件下,能否使安全投入和消耗尽可能少;第二,在有限的安全投资条件下,能否使安全实现尽可能大。
The quantitative analysis results by the external standard method show that the concentration of VOCs in both these two kinds of package film is at the level of 10-1 mg/ m2, and satisfies the requirements of related safety criterion. 利用外标法定量的结果显示两种包装袋中挥发性有机物的含量均处于10-1mg/m2水平,符合相关安全标准的规定。
At the present time, both of the blast vibration velocity and vibration frequency as the blast vibration safety criterion is generally recognized. 目前,以振动速度和振动频率共同作为爆破振动安全判据是受到普遍认可的。
To control the density of gas within the safety criterion is the key to ensure the safety of tunneling through gas strata. 隧道穿越瓦斯地层时,将瓦斯浓度控制在安全范围内是保证隧道安全施工的重中之重。