临界强度

Chinese bee have two fly peak, critical flight int...

中蜂有两个飞行高峰，临界飞行强度为3604只／小时；意蜂有三个飞行高峰，临界飞行强度为7669只／小时，强度大于中蜂而且意蜂的采集范围完全覆盖并明显大于中蜂。

According to the structural intensity model of the Hybrid Extend-range Projectile at the first critical state, in order to validate the structural intensity of the pill at the first critical state, This paper analyses the transient process of cartridge case, rammer, gasket squashing in bore in detail.

本论文结合科研项目，主要通过建立复合增程榴弹在第一临界状态时的结构强度动力学模型，对弹体、弹带、药柱和垫板在相应的冲击挤进过程进行了瞬态有限元分析，校核了弹丸在第一临界状态时的结构强度。

In common glass fiber reinforced polyolefine pipe, when the volume faraction is less than the critical value, the glass fiber can not act as reinforcement, on the contray, it would reduce the whole intensity of the compound material. However, when extruded in combined stress field, the extend intensity of the compound system increases when the volume fraction of glass fibers is less than the critical value. When the glass fiber volume fraction is higher than the critical value, the required glass fiber volume fraction of compound fibers extruded in the combined stress field is less than theory value.

一般玻璃纤维增强管材在常规挤出时当添加的玻璃纤维体积含量小于临界体积分数(当添加的玻纤的复合体系拉伸强度等于基体聚合物材料的拉伸强度时的玻纤体积分数)时，玻纤起不到增强的作用，反而会使复合材料的整体强度降低；但在复合应力场下挤出时，当添加的玻纤含量小于临界体积分数时，复合体系的拉伸强度不但没有降低反而升高了；当添加的玻纤含量大于临界体积分数时，复合体系要达到同样强度，经过复合应力场的玻纤增强管材需要的体积分数小于理论值。

Research on deep anti-sliding stability and reinforcement of entirety polygonal line gravity dam;2. The 2D Elastoplastic Finite Difference Method is adopted to analyze the deep anti-sliding stability for the dam foundation of Longkou hydropower station factory dam.

采用二维有限差分程序对龙口水利枢纽混凝土重力坝厂房坝段进行深层抗滑稳定分析，采用强度折减方法，根据特征点位移突变临界破坏判据和止水帷幕部位夹层错动量达到1mm临界破坏判据分别得出了厂房坝段的两个深层抗滑稳定安全系数。

The physical relationship between critical load Lc measured by scratch test,shear strength and adhesion energy exists.

文摘：本文总结了划痕试验法的物理模型及研究现状，临界载荷与涂层和基体之间的界面剪切强度和附着功有物理关系，临界载荷能够表征涂层与基体的结合力。

Physical model and research development of scratch test are reviewed in this paper.The physical relationship between critical load Lc measured by scratch test,shear strength and adhesion energy exists.The critical load Lc can be used to characte

文摘：本文总结了划痕试验法的物理模型及研究现状，临界载荷与涂层和基体之间的界面剪切强度和附着功有物理关系，临界载荷能够表征涂层与基体的结合力。

Chapter four studies the chaotic responses in a system consisting of simple pendulum and harmonic oscillator under bounded noise excitation. Firstly, the Melnikov function of the two-degree-of-freedom system under Hamiltonian perturbation is derived. The essential condition of the autonomous system for the probable onset of chaos is obtained, the Poincare maps of the system under small Hamiltonian perturbation and the effect of increasing perturbation on the Poincare maps are studies. Then for the non-autonomous system under damping and harmonic or bounded noise excitation, the largest Lyapunov exponent and Poincare maps are calculated. From the analysis of the largest Lyapunov exponent, the critical criterion for the onset of chaos, and the conclusion that the threshold of bounded noise amplitude for the onset of chaos in the system increases as the intensity parameter of Wiener process increases are obtained. The result from the analysis of Poincare maps is in agreement with that obtained from the Largest Lyapunov exponent. The effect of varying damping coefficient and intensity parameter of Wiener process is also analyzed.

第四章研究了有界噪声激励下的两自由度单摆—谐振子系统的混沌运动，首先推导了该两自由度系统仅在Hamilton扰动下的Melnikov函数，得到该自治系统可能产生混沌的必要条件；研究了该系统在小的Hamilton扰动和增大摄动情形下的Poincare截面；然后对有阻尼、谐和或有界噪声激励下的非自治系统数值计算了其最大Lyapunov指数和Poincare截面；从Lyapunov指数分析得到了这个两自由度系统产生混沌运动的临界条件及产生混沌的临界激励幅值随Wiener过程强度参数值的增大而增大的结论，Poincare截面分析的结果亦符合Lyapunov指数分析的结论；研究了Wiener过程强度参数、阻尼系数变化对Poincare截面的影响。

Concrete ; antifreezing ability ; independent cavity ; critical strength

混凝土；抗冻性；独立空孔；临界强度

Our theory predicts the minimum value of ponderomotive parameter and the corresponding critical laser intensity, below which no diffraction can occur; 6, We studied the energy transfer of a two-level atom moving in a cavity field, as well as its influence on the atomic emission spectra and on the photon distribution of the intro-cavity field.

我们用两对激光模来模拟紧聚焦的高斯光场，成功地得到了《Nautre》上Batleaan等人的实验观测结果，预言了有待实验进一步观测的新现象，并确立了发生电子衍射的激光场的临界强度； 6，研究了原子在激光场中运动时光场与原子之间的能量交换，以及这种能量在光谱上的反映和对激光场统计性质的影响。

Two parameters proposed by RILEM,the critical stress intensity factor K ICS and critical crack tip opening displacement CTOD C ,and third parameter of the characteristic length l ch are applied for investigation of fracture characteristics of concrete,which is with different size of coarse aggregate and different content of silica fume,and under different curring condition.

采用RILEM推荐的双参数临界应力强度因子和临界裂缝尖端张开位移，同时还采用了特征长度lch研究了不同粗骨料粒径、不同硅灰掺量以及不同养护条件下这3个因素对混凝土断裂特性的影响。

Neither the killing of Mr Zarqawi nor any breakthrough on the political front will stop the insurgency and the fratricidal murders in their tracks.

在对危险的南部地区访问时，他斥责什叶派民兵领导人对中央集权的挑衅行为。

In fact,I've got him on the satellite mobile right now.

实际上 我们已接通卫星可视电话了