The theoretical analysis and the experimental results indicate that the vibration states depend on the structure of ultrasonic transducer, and the displacement amplitude of the surface of ultrasonic transducer is not zero in general. 理论分析及实验测量结果表明:超声换能器表面振动状态与其结构有关,超声接收器表面位移振幅一般不为零。
The basic structure, amplitude frequency response characteristics and ballistic deficit effect of the algorithm were studied with both theoretical analysis and computer simulation methods. 采用理论推导,结合数值模拟的方法,分析了梯形成形算法的基本结构、幅频特性以及弹道亏损。
It is a very complicated problem to predict structure fatigue life under high-cycle varied amplitude multi-axle loads. One of the keys is the reliability of stress spectrum, and it is closely linked to cycle counting algorithm for making stress spectrum. 高周变幅多轴随机载荷下的疲劳寿命预测是一种非常复杂的问题,其中应力谱的可靠性是关键之一,而应力谱又与所采用的计数法息息相关。
According to the structure error, a kind of method for amplitude detection is proposed which can effectively improve the accuracy of amplitude detection and control. 针对结构误差给出了一种振幅检测方法,可有效地提高振幅检测和控制的精度。
For normal incidence wave with a certain wavelength in each structure, a field with larger amplitude than that of the incident wave field is found in the defect layer, i. 结果发现,对于每种结构,在某一波长的波垂直进入光子晶体时,在缺陷层位置会激发起幅度远大于入射波幅度的场,即产生了谐振现象并形成了微谐振腔;
Design on new structure of ultrasonic amplitude amplifier pole 新型超声变幅杆结构设计
Preventing local instability, reinforcing pipeline structure and controlling change amplitude of pipeline slope should be considered importantly in the design. 在设计时应重点考虑防止局部失稳、加强管件结构及控制管道坡度变化幅度。
The research of 3D high resolution development seismic in the area showed that the block is very complicated on structure shapes, developed with low amplitude structure at local uplifts and small faults. 三维高分辨率开发地震技术研究表明,构造形态复杂、局部隆起的微幅度构造及小断距断层十分发育。
The principle, structure, vibration frequency and amplitude of the resonance stirring reactor are discussed. 本文对自制共振搅拌反应器的原理、结构、振动频率和振幅进行了分析。
· The south part of west depression has deep detachment surface and high structure amplitude, so it is a favourable area for hydrocarbon exploration. 西洼南部,滑脱面深度较大,构造幅度大,是油气勘探的有利地区。
Compared with single-ring resonator, the series-coupled multiple-rings structure obviously improved the amplitude response and eliminated the second-order group delay dispersion. 与单环结构相比,不仅幅度特性得到了明显的改善,而且消除了二阶群时延色散效应。
The definition of intraday price amplitude was proposed. The dependence structure between return and intraday price amplitude was analyzed based on Copula technique, and the tail-dependence coefficient was obtained. 给出了股价日内波幅的定义,并应用Copula方法得到了股票价格日内波幅和收益率的相依结构,以及两者之间的尾部相依系数。
Fracture Characteristic of Automobile Structure Strengthening under Low Amplitude Load 汽车结构件低载强化后的疲劳断口特性
Using this method it is possible to solve the problem of extracting structure amplitude moduli from electron diffraction data and also to solve the phase problem that commonly occurs in diffraction analysis. 此法可解决从电子衍射数据求解结构振幅绝对值的问题,亦可解决各种衍射分析所共有的相角问题。
Discuss a number of novel applications of Quantum Chromodynamics to nuclear structure and dynamics, such as the reduced amplitude formulism for exclusive nuclear amplitudes. 讨论量子色动力学在核结构及核动力学上的一些应用,如相斥核振幅的约化振幅形式。
Based on the analysis of damping mechanism, damping ratio data of building materials, buildings and building models, it is concluded that the main factors of damping performance of building are strength of concrete, percentages of longitudinal steel, structure configuration and deformation amplitude. 通过对建筑物阻尼机理、建筑材料、建筑物和建筑模型阻尼性能试验数据的分析,本文对混凝土强度、纵向配筋率、结构形式和结构变形大小等建筑阻尼性能的主要影响因素进行了分析。
With such model the effect of tower structure, lightning current amplitude, angle of the lightning incidence, as well as the ground angle on the shielding failure rate are analyzed. 应用改进的电气几何模型分析了输电线路杆塔结构、避雷线和导线的布置、雷电流的幅值、地面倾角对绕击率的影响。
During Himalayan tectonic episode, the increasing structure fold amplitude stimulated hydrocarbon to fill out the reservoir, and the lithologic gas pool controlled by structure and lithology formed at last. 进入喜山构造期,构造褶皱幅度加大,油气不断充实储层,形成受构造、岩性双重制约的构造&岩性气藏。
An Approach of Light Damping Structure Measurement by Amplitude Tracking in Frequency Domain 结构小阻尼测量的频域内幅值跟踪方法研究
Due to some factors induced by the fabrication technology and fitting process, the inevitable HRG structure error can affect the amplitude detection and control. 半球谐振陀螺由于制造工艺和装配过程中的因素,其结构难免出现误差,对振幅的检测和控制产生影响。
The materials discussed attributes, structure layer thickness, temperature variation amplitude of the influence of temperature stress. 讨论材料的属性、结构层的厚度、温度变化幅度对温度应力的影响。
If the decomposition in the top of the structure, modification of the amplitude can be amplified, as modified after use can be removed, does not need to be changed back to the original standard way; otherwise, it is necessary to consider the energy can. 如果分解出现在结构的最顶端,改装的幅度可以放大,因为改装使用完之后就可以拆除,不需要改回原来标准的方式;否则就要考虑能分能合。
The structure of Wien-bridge oscillator with automatic amplitude control function used in integrated circuits is introduced. 2. 本论文的主要工作有:1.仿真实现了应用于集成电路系统的具有自动振幅控制功能的文氏电桥振荡器结构。
Many results are approached, such as the response transfer function of the rigid body, the vertical bending mode response amplitude of the structure and the vertical displacement amplitude distribution and bending distribution of the whole structure in axial direction. 计算给出了刚体运动响应传递函数;结构的垂向弯曲模态响应幅值,以及沿轴向整体结构的垂向位移幅值分布、弯矩分布等。
Numerical simulation and analysis of motions and loads of ship and ocean structure under waves with large amplitude are very important in theory and engineering application. 船舶和海洋平台在波浪中运动和荷载的数值分析和研究,具有重要的理论意义和实用价值。
The change of sedimentary facies always corresponds with the total change of the seismic reflection structure which is related to the amplitude, phase, frequency, etc. while the overall changes in seismic waveform can reflect changes of the seismic reflection structure. 沉积相和岩相的变化总是对应着地震反射结构(与振幅、相位、频率等相关)的整体变化,而地震波形的总体变化能够体现地震反射结构的变化。
This paper came to the following main conclusions: 1. From the structure of land use, quantity, amplitude and speed etc, to analysis the land use change of Rongchang between the year of 2003 and 2008. 本文主要得出以下研究结论:(一)从土地利用类型、数量、变化幅度与速度等方面,对荣昌县2003-2008年土地利用动态变化进行分析。
The curves of active control force and structure amplitude against incentive frequency are plotted respectively by examples. 通过算例,分别绘出了主动控制系数、主动控制力、结构物振幅与外激励频率之间的关系曲线。
The research find main genesis low resistivity is created by low reservoir structure amplitude; complex pore structure, high immobile water content and brine mud invasion in the Tertiary of X plot. 研究发现X地区第三系油层低阻的主要成因是由油藏构造幅度低;孔隙结构复杂、不动水含量高;盐水泥浆侵入共同作用造成的。
Sources of spurious signals for entirely digital structure of DDS include phase truncation error, amplitude quantization error and non-linear characteristics of DAC. 验证了DDS因为全数字结构带来的杂散来源,包括相位截断误差、幅度量化误差和DAC非线性误差等。