The research of dynamic propagation of crack is prevalent in explosion mechanics.
爆炸裂纹的动态扩展问题是爆炸力学研究的热点。
The principles and methods of Medium Theory have given us great ways and views to study the phenomenon of contemporary communication and dynamic propagation discipline.
媒介形态理论的原理与方法给出了研究当代传播现象和动态传播规律一个很好的研究方法和视角。
Fracture mechanism, initiation and propagation of cracks, and the control method of cracks in rock like brittle material under dynamic load are described in this paper.
本文主要论述了动荷载作用下岩石等脆性材料的断裂破坏机理、裂纹形成与扩展以及裂纹的止裂与控制等内容。
From the view point of material selection, we analyzed their dynamic fracture toughness and crack propagation resistance.
从选材角度对比分析了几种铝合金的动态断裂韧性及裂纹扩展阻力。
Therefore the study of interaction of stress waves with cracks will greatly contribute to the interpretation of blasting mechanism, the stress wave propagation and the dynamic behaviour of material.
因此，研究应力波与裂隙的相互作用，对于研究岩石爆破机理、应力波传播规律以及波的反演——材料的动态特性等有着十分重要的意义。
This paper only involves selection of detonating methods and propagation of earthquake waves. The study shows the superiority of using dynamic photoelasticity in the research area.
本文仅涉及地震波传播及爆破方法选择两个课题，研究表明：在这类课题中，利用动态光弹性法有其优越性。
The propagation process of ultrasonic pulse along solid-solid interface is recorded by the dynamic photo-elastic method in this paper.
本文报导了用动态光弹法记录的沿两种玻璃形成的界面上超声脉冲的传播过程。
And the effect of limit concentration and concentration of the medium at normal temperature on the dynamic control process of crack propagation is also discussed.
并对极限浓度及常温下介质浓度对裂纹扩展的动力学控制过程影响进行了讨论。
Then the characteristics of frequency variation during the fatigue crack propagation process are simulated by three - dimensional dynamic finite element analysis.
并利用三维动态有限元模拟了点焊接头疲劳裂纹扩展过程中频率变化特性。
By the application of complex functions theory, the dynamic crack propagation problems under the condition of anti-plane were investigated.
采用复变函数论，对反平面条件下的动态裂纹扩展问题进行研究。
The influence of hydrogen on the deformation ahead of crack tip and crack propagation were in-situ observed and analyzed under TEM during dynamic tensile deformation of engineering structure steel.
利用透射电镜原位动态拉伸方法观察、分析氢对裂纹尖端塑性变形及裂纹扩展过程的影响。
The relationships between dynamic contact force and indentation are derived in the case of longitudinal wave propagation.
在仅考虑纵波传播的情况下，寻出了撞击力-压入位移关系。
The dynamic plastic fracture toughness CTOD and its variation with different. crack propagation speeds.
塑性动态断裂韧性CTOD，及其在不同裂纹扩展速度下变化规律的测试。
An experimental method of wave propagation is suggested to determine the dynamic properties of a low alloy structure steel.
本文建议了确定一种低合金结构钢动态力学性能的波动传播的实验方法。
The fracture process observed by SEM with a dynamic tensile stage showed that the dispersed phase of TLCP could delay and block the propagation of microcracks.
使用带拉伸实验台的扫描电镜观察到了TLCP微纤或微球对微裂纹扩展的阻滞及延缓作用。
A theoretical model is developed to simulate the dynamic load transfer between the actuators and the host medium and the resulting elastic wave propagation.
建立一个理论模型来模拟致动器和母体之间的动态载荷传递以及产生的弹性波传播。
A discrete time dynamic model is proposed for bursty propagation of incidental events based on the node popularity and activeness in blog networks.
提出了一个基于节点知名度和活跃度的离散时间话题传播模型。
It is necessary to build animal disease information system to dynamic monitor and predict such as HPAI and FMD disease taking place, distribution, propagation.
构建动物疫病信息系统来动态监控预测诸如禽流感、口蹄疫等疾病的发生、分布、蔓延已成必要。
The theory about stress wave and its propagation is employed to analyze the effect of dynamic unloading during excavation of jointed rock mass slope under high geostress.
利用应力波理论分析高地应力条件下节理岩体边坡开挖过程中的动态卸荷效应，探讨卸荷松动后节理岩体渗透特性的变化规律。
Stress. wave propagation in stepped shafts under impact by dynamic photoelasticity was studied.
本文用动光弹方法研究了受冲击载荷的阶梯轴中的应力波的传播。
During fracture propagation driven by detonation gas in oil well, dynamic response of crack surface under the gas pressure results in fast fracturing.
油井爆生气体对岩石劈裂作用过程，是裂缝面对动态荷载响应并使其发生动态扩展的过程。
In this paper, under the assumption of point source propagation of waves an approach of 3-d dynamic analysis of seismic response of embankment DAMS is proposed.
本文利用波的点源传播假定，建议了一种计算堤坝地震反应的三维动力分析方法。
The structure acoustic radiation caused by longitudinal vibration of shafting is reduced by changing excitation force propagation path and adopting vibration isolator or dynamic vibration absorber.
改变轴系纵振激励传递途径，在轴系上安装纵振减振器或动力吸振器以降低结构水下辐射噪声。
Based on the one dimensional wave propagation theory, a simple dynamic model was presented to analyze the failure process and energy absorption of the shells under impact loading.
根据一维应力波传播理论，提出了圆柱壳受轴向撞击破坏的简化模型，分析了这一破坏过程中的能量变化。
Disadvantages of the back propagation algorithm are discussed, and the improved methods based on dynamic learning constants and different activation functions are presented.
讨论了误差逆传播算法存在的缺陷，并针对其缺陷提出了动态调整学习因子与合理选取激发函数相结合的改进方案。
A dynamic mapping infinite element is presented for characterizing the waves with different wave Numbers in homogeneous foundation and simulations of propagation behavior in different media.
本文提出了一种映射动力无穷元，这种单元不仅可以表征在均匀介质中传播的不同波数的波，而且可以模拟地基中不同介质内的波的传播特性。
A new dynamic holophotoelasticity method is used in laboratory test to study propagation of dynamic stress by blasting subjected to initiative stress.
以最新的激光动光弹为实验手段，对初始应力条件下的爆破应力波的传播过程进行了实验研究。
The plane-section assumption was not congruous in low strain dynamic tests on pipe piles, so the propagation of stress wave couldn't be expressed by 1D wave equation.
管桩低应变检测时，平截面假定并不满足，应力波的传播不能简单地用一维波动方程描述。
A neural network model with dynamical compensating capability is analyzed. During the training of this network model, we apply the principle of dynamic error back-propagation.
本文分析了一种动态补偿神经网络模型，模型的训练利用反向传播原理实现。
A neural network model with dynamical compensating capability is analyzed. During the training of this network model, we apply the principle of dynamic error back-propagation.
本文分析了一种动态补偿神经网络模型，模型的训练利用反向传播原理实现。
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