查询词典 longitudinal wave

In summary, various key experimental conditions in electron acoustic imaging of ferroelectric domains were systematically studied. The optimum experimental conditions to obtain EAI of domains with good quality and the factors important to image analysis have been presented. The piezoelectric vibrator model and calculation of motion equation are helpful for explaining the imaging mechanism and related experimental phenomena. The sample holder with variable electric field was designed. The domain movement of BaTiO〓 ceramics and crystal under lateral and longitudinal applied electric field and domain movement of PMN-PT crystal under longitudinal poling electric field were observed. The application of SEAM on revealing of ferroelastic domains, imaging of residual stress distribution in ceramics coatings and around the pores on the surface of ferroelectric ceramic composite have been reported respectively. All these works enriched the study of electron acoustic imaging and extended the application of SEAM in the characterization of materials.

综上所述，本文系统地研究了各项关键实验条件对电畴电声成像的影响，指出了获得最佳畴结构电声像的条件和成像分析中应当考虑的各种影响因素；提出了解释电畴电声成像的压电振子模型，在此基础上推导并求解了压电振子运动方程，并对一些实验现象作出了解释；成功地设计了可变电场的样品台，观察了BaTiO〓陶瓷和晶体在横向电场作用下的畴运动，PMN-PT晶体在纵向极化电场作用下的畴运动；探索了电声显微镜在铁弹畴成像，陶瓷涂层应力观察，陶瓷自然表面气孔周围应力成像的应用，这些研究，丰富了电声成像的学术内涵，拓展了电声显微镜的应用领域。

The thesis mainly studies the potential well effect on the bunch longitudinal distribution, on the basis of correlated wake field, coupling impedance and various instabilities. Then the inductance and resistance parts of coupling impedance of the KEK-ATF damping ring are obtained from the analyses of the measured bunch longitudinal distribution.

本论文在充分阐述与束流集体效应相关的尾场、耦合阻抗和各种不稳定性的基础上，着重研究了势阱效应对束团纵向分布的影响，并由实测的KEK-ATF阻尼环的束团纵向分布得到了其耦合阻抗的电感和电阻部分。

The bunch lengthening is mainly due to potential well distortion and longitudinal microwave instability . From the systematical measurement of the bunch longitudinal distribution, the inductance and resistance parts of coupling impedance of the BEPC storage ring are got.

束长拉伸主要是由于势阱畸变和纵向微波不稳定性，本论文从束团纵向分布的测量中，首次得到BEPC储存环耦合阻抗的电感和电阻部分，并用所得到的耦合阻抗模型对束长拉伸进行验证。

The results show that: The mechanical behavior of universal segment lining is different under different assembling modes, which relates to the assembling types, places of transverse and longitudinal joints and position of the seal roof block the objective segment ring; design values of positive and negative moments, shearing force of segment liming and shearing forces of longitudinal bolts of universal segment lining are controlled with staggered joint assembling, and design values of deformation and surrounding rock resistances are controlled with straight joint assembling.

结果表明：通用管片结构在不同拼装方式下的力学行为是不相同的，与拼装类型、分析目标环的环向和纵向接头的位置、封顶块的位置有关；错缝拼装控制通用管片结构正负弯矩、剪力、纵向螺栓剪力设计值；通缝拼装控制变形量和地层抗力设计值。

Blade according to claim 1, characterised in that the portion of the spar received in the shell (44) is a single longitudinal bundle (50), solid and substantially flat, connecting to one another the pressure and suction face coverings that each comprise an outer skin (4a, 4b) internally reinforced, from the leading edge (45) and to a point beyond the spar (50), in the direction of the trailing edge (46), by a sole (53a, 53b) for rigidifying the blade in flapping, each sole being laminated and constituted by longitudinal mats or sheets of unidirectional fibres of carbon agglomerated by a polymerised synthetic impregnation resin ensuring the connection by adherence of the pressure and suction face surfaces of the spar (50) directly to the inner faces of the corresponding soles (53a, 53b).

刀片根据权利要求1 ，特色是在该部分的SPAR公司收到的蚬壳（ 44 ）是一个单纵束（ 50 ），固体和大幅的单位，连接到另一个的压力和吸力面对覆盖，每个包括一外皮肤（第4 A ， 4b ）的内部钢筋，从领导力（ 45岁）和一个点，超越了SPAR公司（ 50 ），在方向，尾随的优势（ 46分），由一个唯一的（ 53A条， 53b ） rigidifying刀片在扑，每个唯一被叠层和所构成的纵向垫或床单单向碳纤维烧结由polymerised合成树脂浸渍确保连接坚持的压力和吸力面对表面的SPAR公司（ 50 ）直接向党内的脸相应的鞋底（ 53A条， 53b ）。

By using the expansion of spherical wave functions for a cylindrical wave function and with the help of the theory of hypergeometric functions, the Sommerfeld type integral contained in the electromagnetic fields is expressed as a rapidly and absolutely convergent series of spherical wave functions; and the coefficients of the series are the Legender Polynomials with the complex argument for the constitutive parameter.

应用圆柱波函数的球面波展开式和超几何函数理论，场分量中的索末菲尔德型积分被表示成快速、绝对收敛的球面波函数系展开式；展开系数是以物性参数为复宗量的勒让德多项式。

By using the expansion of spherical wave functions for a cylindrical wave function and with the help of the theory of hypergeometric functions, the Sommerfeld type integral contained in the electromagnetic fields is expressed as a rapidly and absolutely convergent series of spherical wave functions; and the coefficients of the series are the Legender Polyno...

应用圆柱波函数的球面波展开式和超几何函数理论，场分量中的索末菲尔德型积分被表示成快速、绝对收敛的球面波函数系展开式；展开系数是以物性参数为复宗量的勒让德多项式。

Based on the Volume of Fluid Method, the wave damping absorber of the numerical wave flume for irregular waves has been investigated. Setting the Turbulence motion equation and the Renault equation as the governing equations and using the wall function technique in the near-wall region, an absorbing wave-maker is set at the left side of the flume.

本文对基于VOF方法的不规则波数值波浪水槽进行了阻尼消波研究，以湍流运动方程一雷诺方程为控制方程，在近壁区应用壁函数技术，在数值波浪水槽的左端设置了主动吸收式造波机。

Based on wave propagation feature, this paper analyses 3D seismic migration algorithms such as alternating direction implicit method, LU decomposition method, and inverse operator approach method. The result shows that the alternating direction implicit method is fast but causes distortion in wave field extrapolation and affects image accuracy; however LU decomposition and inverse operator approach methods are fast while holding circular symmetry of wave field, and are promising in oilfield exploration and development.

在波的传播特征分析基础上，对交替方向隐式法、LU分解法、逆算子逼近法等三维地震偏移算法进行了分析研究，结果表明，交替方向隐式法虽然快捷但是在波场外推中明显产生畸变并影响成像的准确性，而LU分解和逆算子逼近法是保持波场圆对称特征前提下的快速算法，在油田勘探开发中具有较好的应用前景。

The results were analyzed with the statistical software package spss10.0.results ①between two groups,there was no significant difference about the affection of age,sex and the destribution and location of aneurism on prognosis outcome(p＜0.05).however,the grading of hunt hess and fisher in group a(gos＞3) showed significantly lower than in group b(gos≤3),（p＜0.001）;② there was no significant difference in the frequency of heart rate, st elevation, st depression,t wave inversion,u wave inversion and ventricular arrhythmia(p＞0.05).the frequency of abnormal q wave, supraventricular arrhythmia and the ecg scores in group a showed significantly lower than in group b （p＜0.05,p＜0.001）;③the ecg scores was the most powerful multivariate risk stratified(ecg ≥5 vs ecg＜5; p=0.002,or=0.010,95%ci 0.001~0.173).conclusion the ecg score, a new and simple method of semi quantification, was a powerful risk predictor for patients with sah.

应用spss10.0 统计包分析结果。结果①在年龄、性别、动脉瘤生长部位影响动脉瘤性sah预后方面，两组病例无明显差异（p＞0.05）。而按sah后hunt hess分级和fisher分级，gos＞3病例的分级要明显低于gos≤3的病例的分级（p＜0.01）；②两组在心率、st段抬高、st段压低、t波倒置、u波倒置、室性心律失常出现的频率无明显差异（p＞0.05）；在异常q波和室上性心律失常出现频率及心电图评分方面，gos＞3的组别明显低于对照组（p＜0.05，p＜0.001）；③心电图评分是sah患者预后最显著影响的变量（p=0.002，or=0.010，95%的可信区间0.001~0.173）。结论心电图评分作为一种新型、简便的半定量方法，能有效的预测蛛网膜下腔出血病人的预后。关键词：心电图；预后；评分；蛛网膜下腔出血

He's a pretty westernised kind of guy.

他是一个非常西化的人。

National spirit is the moral kingpin for a nation to realize common ideal and goal.

一、中华民族精神的基本内涵党的十六大报告指出：在五千多年的发展中，中华民族形成了以爱国主义为核心的团结统一、爱好和平、勤劳勇敢、自强不息的伟大民族精神。