查询词典 damage

Depending on the character of Lamb wave propagation , thedamage scat tering signals were time reversed and reemit ted to the damage , and then they will arrive at the damage synchronously so that the damage scat tering signal caught again will be amplified. Details about the time reversal amplifying process were analyzed and given. Based on the focalization ability of time reversal theory to the wave origin , the wave propagation was rebuilt by an image method which displays the damage as the focusing point .

根据信号传播自身的特性，研究采用时间反转聚焦方法使损伤散射信号能量叠加放大，从而提高信号的信噪比，分析给出了具体的损伤信号时间反转聚焦增强过程；利用时间反转法对波源的自适应聚焦能力，重建信号传播波动图，通过信号聚焦显示损伤位置和区域。

To associate aseismic design idea that"no damage under light earthquake, reparable under medium degree earthquake and no collapse under intense earthquake"with design method based on damage property, the thesis adopted different damage limit values to control structural damages at different levels so that the designed structure can embody the substantial need of aseismic design based on damage property.

把"小震不坏、中震可修、大震不倒"的抗震设计原则与基于损伤性能的方法统一起来，采用不同的损伤容限值来限定各水准下的结构损伤，从而使所设计的结构充分体现基于损伤性能抗震设计的实质要求。

This damage criterion reflects the character of RCC, and shows that stress degree of RCC damage decreasing with heat current density vector and temperature gradient augmenting. If this process of RCC damage is in constant temperature, the damage completely depends on stress degree, which accords with the result of experiment.

结果 碾压混凝土热耗散和损伤耗散累积到一定程度时，损伤破坏就会发生，且随着热流密度矢量和温度梯度增大，碾压混凝土发生损伤破坏的应力水平将降低，如碾压混凝土是一个等温变化过程，则损伤完全取决于应力水平。

So in this paper a new damage variable was defined, then, Based on damage theory and Weibull distribution damage evolution rule, a simplified ameristic damage constitutive equation was established for concrete under uniaxial compression.

为了用简单的方程将上升段和下降段连接起来，本文以峰值割线模量为基准，定义了一种新的损伤变量；并以经典损伤理论模型为基础，根据混凝土损伤演化规律的概率密度服从Weibull分布，提出了一个统一的方程来描述混凝土单轴压缩时应力应变关系的全过程。

What\'s more, different intervals of UV have their own characters in influencing DNA: the damage to some bases by UVA may be more serious than that by UVB, and UVB did more severe damage to some deoxyribose than UVA; however, as far as the pyrimidine bases are concerned, the damage by UVB is by far more serious than that by UVA. These results may indicate that there are preferential damaging sites on DNA molecules caused by UVA and UVB irradiation. Moreover, with UVA or UVB irradiation for a long time, the photoreactivation of DNA occurred. The serious damage to deoxyribose and bases by UVB and UVC may confirm the conformation of cyclobutane pyrimidine dimers and (6-4) photoproducts.

而不同波段紫外辐射对DNA的损伤各具特点并且差异明显，UVA对一些碱基的损伤比UVB要严重，而UVB在对脱氧核糖和磷酸盐的损伤上又比UVA要严厉，但就嘧啶碱基来说，UVB对它的损伤远大于UVA，这似乎表明了不同的紫外波段对生物大分子DNA的损伤是有选择性的。

In order to describe the fatigue damage characteristic under multiaxial proportional and nonproportional loading, a new nonlinear multiaxial fatigue damage cumulative model was presented on the basis of combining multiaxial fatigue damage characteristic. The recurrence formula of multiaxial fatigue damage model was derived under multilevel loading.

为了描述多轴比例与非比例加载下的疲劳损伤特性，结合多轴疲劳损伤的特点，建立了一种新的非线性多轴疲劳损伤累积模型，并推导给出了该疲劳损伤累积模型在多级加载条件下的递推公式。

With the frequency and mode shape being regarded as functions of damage parameters, the overdetermined algebraic equations with damage parameters as unknowns can then be constructed by differentiating frequency and mode function on the basis of structure mode finite element formula, the damage parameters of which are obtained via Taylor expansion. The whole damage parameters can be found via solving the algebraic equations.

本方法从结构模态有限元算式出发，把频率和振型看作损伤参数的函数，经过泰勒展开获得频率、振型对损伤参数的一阶偏导数，然后构造以损伤参数为未知量的超定线代方程组，求解得到全部损伤参数值。

Among these three types of water locking damage, the water locking under underpressure condition has the minimal damage, the damage under overpressure condition is relatively maximal, and the damage under normal pressure is relatively medial pressure is relatively medial.

研究表明，低渗透砂岩气藏的水锁伤害具有普遍性和严重性，其中欠压作用下的水锁伤害最小，超压作用下的水锁伤害最大，常压作用下的水锁伤害居中。

Based on statistical damage theory, the instantaneous damage constitutive relationship of gypsum breccias is studied. In consideration of the impact of damage threshold, a statistical damage constitutional equation is established.

在以上试验的基础上，基于统计损伤理论研究了石膏角砾岩瞬时损伤应力应变本构关系，提出统计损伤应考虑损伤门槛的影响，建立了考虑损伤门槛的统计损伤本构方程，理论计算结果与常规试验结果比较接近。

ABSTRACT Based on the existing damage model of rock blasting and the theory of rock damage and fracture, a new damage model for rock blasting, a gas-driven fracture propagation and damage localization at the crack tip model during explosion products are proposed.

在分析研究现有岩石爆破损伤模型和岩石损伤断裂理论的基础上，建立了一个新的岩石爆破损伤模型和岩石在爆生气体作用下的裂纹扩展及裂纹尖端损伤局。。。

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