查询词典 propagation loss

On the research of the propagation of the fatigue crack in the past 10 years, Paris and Zheng-hart have developed good formulas of the propagation of the fatigue crack of metal , but of which only describe the process of the propagation of the fatigue crack.

在近几十年对疲劳裂纹的扩展的研究中，Paris和Zheng-hirt对金属材料疲劳裂纹扩展的研究给出了很好的扩展表达式，但都是对疲劳裂纹扩展部分过程的描述。

Its wave propagation properties in symmetry and asymmetry structure are analyzed by 3-D EBPM including the analysis and study of the influence of refractive index to wave propagation. The bend fiber-slab is also studied in this paper and point that the influence of the refractive index of the substrate to wave propagation in fiber-slab is very important. The calculating results agree with the results of the test.

本论文利用三维显式光束传播法很方便地分析了对称、非对称光纤—光波导复合结构中光波的传输问题，包括光纤折射率的大小、光波导折射率的大小对光波传输的影响等在内的主要内容；随后又研究了光纤弯曲时光波导包层折射率对光纤内能量功率大小的影响，计算结果和实验结果吻合。

This paper discusses some application cases of the error propagation law by the examples of trigonometrical survey, and presents that not only sum function and numeral multipling function in which there is only one independent observed value but also more complex functions which are equal in mathematics are not opposite in the process of error propagation according to the error propagation law.

1引言本文以三角测量为例，对误差传播定律一些应用问题进行了讨论，指出当只有一个独立的观测值时，和函数与倍数函数运用误差传播定律不会出现悖论；如果在测量工作中有多余的直接观测值，就需用平差后的间接观测值按协方差传播律来计算，这样数学中相等的函数关系才能得到同样的函

After comparing nonlinear simulation with linear, the results indicate that: Weak nonlinearity has definite and apparent influence on the distribution of acoustic fields and focused gain of array, which cause the distribution of waveform is closer to the array and the focused gain deteriorate ; the strong nonlinearity have a strong waveform aberration, because the other waves of non-fundamental frequency appear . No evident distinction is found in the effects between the oblique propagation and the vertical propagation, though less focused gain and influence caused by strong nonlinear produced by the acoustic diffraction which results in more attenuation in terms of oblique propagation.

将线性条件下的模拟结果与非线性条件下的模拟结果进行比较发现：弱非线性会对声场的分布和阵列聚焦增益产生一定的影响，使得声场分布波形比线性条件下的更加靠近阵列，聚焦效果变差；强非线性会使波形发生更严重畸变，这是由于产生了基频以外的其他频率声波引起的；非线性对斜向传播时声场分布的影响与垂直传播时的影响效果基本相同，但由于斜向辐射时的声波衍射造成的衰减要大于垂直辐射时的，因此聚焦增益和强非线性的影响都将小于垂直辐射时的情况。

The first is termed aero-optic and involved optical transmission through aberrating fluid layer whose thickness, L, is smaller than or comparable with the viewing aperture dimension, A, and the turbulence scales, A , are smaller than or the order as the layers thickness:The second category, atmospheric propagation, involved optical transmission through the aberrating medium over very long propagation distance compare with the viewing aperture size, and the turbulent scales of note are generally less than or the same order as the propagation distance:Depending on the atmospheric conditions, for ground-based observatories, wave-front sensor operating at 300HZ can adequately resolved both the important spatial scales and the temporal evolution of the atmospheric-turbulence-induced aberrating wave front over viewing aperture associated with relatively large telescope.

第一类问题光学畸变发生在&近场&较短的光路上，即流层厚度L，光束直径A，以及湍流尺度Λ三者之间存在关系式：ΛA≤L≤A第二类大气传输问题光学畸变则发生在较长的一段光路上，L，A，以及Λ满足： A＜＜Λ≤L对于地基情况下的大气光学传输，300Hz的波前传感器就能实时地测得光波前畸变包括时间、空间频率的相关信息，为我们的自适应光学系统的设计、制造以及进行相关的自适应校正都有着相当重要的指导意义。

With the propagation of the input negative-falltime pulse along the transmission line, the capacitance of varactor diodes is decreased by the increase of reverse bias voltage, and the variation in propagation delay at the nodes results in the compression of negative-going wavefronts during propagation.

随着输入脉冲在传输线上的传播，变容二极管的电容随反偏压增大而减小，导致每个节点传播延迟的变化，从而压缩脉冲波前，产生前沿可达1ps的超快脉冲。

In the experimentation, the premixed propane-air flame propagation behavior was studied as the following:(1) Study on pressure wave influence on premixed propane-air flame propagation behavior under different pressure relief case The high speed Schlieren photograph method was used to record the dynamic process of flame propagation clearly, including the precise flame front position, flame structure, and so on.

实验过程中，首先利用预混火焰精细实验台对丙烷-空气预混火焰的传播特性进行了实验研究：(1)重点研究了不同泄压条件下的压力波对丙烷-空气预混火焰传播特性的影响。

The results of conversion show that the serious disc must be rejected because its reliable L-HCCF life is greatly less than an overhaul period. Finally, the load distribution of centrifugal and vibration force on labe is derived. Using two method, load on the crack labe gradually reducing and keeping constant with the crack propagation, a crack propagation analysis of fir-tree slot is carried out, and the calculating L-HCCF crack propagation life of slot on the unload method, which is nearly 3 times longer than that on constant method, is 20 times shorter than the pure low cycle life, and agree well with the experimental's.

最后，分析了离心力载荷和振动载荷在榫齿上的分布，进行了榫槽榫齿的有限元计算；提出了枞树型榫槽的卸载概念，并按带裂纹榫齿上的承载随裂纹增长而逐步减少和始终保持不变两种处理方法，进行了复合疲劳裂纹扩展及其寿命计算，由计算得出卸载下复合疲劳裂纹扩展寿命较单纯低周疲劳寿命下降二十多倍；按卸载处理的疲劳裂纹扩展寿命是按恒载处理的三倍多，前者与试验吻合，而后者则偏差较大。

For ease of analyzing therelation of competition and social risks,the treatise proposes the two pairs of newconcepts;self-incurred loss and nonself-incurred loss in competition and compensableloss and non-compensable loss in competition.It maintains that the self-incurred lossand compensable loss in competition will generally lead to no social risks and,onlywhen the loss is nonself-incurred or non-compensable in nature,it will lead to socialrisks.

为了便于分析竞争与社会风险的关系，本文提出了"竞争的自致性损失与竞争的非自致性损失"、"竞争的有补偿损失与竞争的无补偿损失"这两对新概念，认为竞争自致性损失、有补偿损失一般不会产生社会风险，只有当竞争损失是非自致性损失或无补偿损失时，才会产生社会风险。

Then the alveolar bone of model 1 was lowered to respectively construct Model 2(Bone loss was one fourth of the root), Model 3(Bone loss was one third of the root), Model 4(Bone loss was the half of the root), Model 5 (Bone loss was the two third of the root) and Model 6 (Bone loss was the three fourth of the root).

在模型1基础上，将牙槽骨骨高度分别删除1层、2层、3层、4层、5层(使处理后的牙槽骨骨高度与牙根长度之比由1：1变为3：4、2：3、1：2、1：3、1：4)，产生模型2、模型3、模型4、模型5、模型6，代表五种不同程度的牙槽骨骨吸收模型。

Putt your way through 36 fun-filled holes of minigolf on 3D designed courses with elevated greens, bunkers, bridges and water hazards, among other crazy obstacles.

您的推杆方式，通过36个有趣的填孔迷你的三维设计的课程，以提升绿党，掩体，桥梁和水的危害，除其他疯狂的障碍。

Some participles can be used either as attributes or as predicatives.

有些分词既可当定语用，也可当表语用。