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- The propagation modes of internal acoustic field and the elasticity and wall thickness influence to them in a water-filled elastic tube waveguide were researched by applying the strict elastic theory . 本文采用严格的弹性理论,研究了水声声管的内部声场的传播模式以及弹性和壁厚对内部声场的影响。
- internal acoustic field 内部声场
- The principle of the car acceleration noise is discussed and the acoustic field model for underneath car cavity is derived. 论述了轿车加速行驶噪声的原理,推导了轿车与地面间声场的声学模型。
- There were 3 specimens(3/40, 7.5%) whose base ring of cochlea extensed into internal acoustic meatus(IAM). 40侧标本中有3侧(7.;5%25)耳蜗底周突入到内听道(internal acoustic meatus，IAM)内。
- The trajectories of particle movements in a standing wave acoustic field are recorded by fast-speed video camera. 采用可视化实验的方法,拍摄可吸入颗粒在驻波声场中的运动轨迹。
- Show reduced scale model can accurate reflection actual hall acoustic field over loud time. 表示缩尺模型可以准确的反映实际厅堂声场馀响时间。
- Dilatation of internal acoustic canal on the plain film of skull was easily found in cases of acoustic neuroma (70%), and rarely seen in meningioma. 26例(70%25)听神经瘤病人的内听道在常规头部检查均有腐蚀扩大徵象，脑膜瘤则仅一例有之。
- A method for measuring acoustic field of electromagnetic ultrasound is introduced. 介绍了一种测量电磁超声声场分布的方法。
- It is very important to pick out the qualified flakes by acoustic field measurement in equipment manufacture. 通过声场测量,筛选出合格的压电陶瓷球片,在治疗设备的制造中显得尤为重要。
- A further expcrimental investigation of a controllable arti-ficial transition by means of internal acoustic excitation was carriedout in flat-plate boundary layers. 本文对声激发控制边界层转换问题在低湍流度风洞中作了进一步实验研究。
- A low-speed wind tunnel test shows that beneficial effects on enhancing lift can be obtained by using internal acoustic excitation to control the shedding vortices. 二元后台阶低速风洞实验表明,用内部声激励控制脱落旋涡能够获得有利的增升效应。
- Much less EPU times are required for calculating the superposing acoustic field than calculating the classical Fresnel integral. 用单阵元分布函数迭加所得的换能器声场分布的数值计算,比计算经典的Fresnel积分的运算量要小得多。
- Aim In order to simulate the agglomeration of fly ash particles in the acoustic field more exactly, a new math model is constructed. 目的为了更精确地模拟煤飞灰微粒在声场中的团聚机理,建立一种新的数学模型。
- The experimental research on the pipe flow under the influence of high-intens ity acoustic field is presented in this article. 用实验手段研究强声场对管道内气体流动的影响。
- Acoustic vector sensor can measures the pressure and particle velocity information of the same point in acoustic field simultaneously. 摘要 声矢量传感器能够同步、共点地拾取声场的声压和质点振速。
- Thus, this skin decouples the vibrating structure from the acoustic field by modifying the wavenumber spectrum of the radiating surface. 首先考虑在边界表面的一端具有脉冲或周期振荡式边界热通量的正算问题。
- Brillouin enhanced four wave mixing, whose interference beat frequency drives an acoustic field, can improve the SBS phase conjugation fidelity. 采用四波混频加强SBS的方法，其相干拍频驱动声子场，能提高SBS相位共轭保真度。
- The experiments successfully indicated that the transition location of laminar boundary layer can be controlled by internal acoustic excitation with an appropriate input power in a frequency range which is far beyond the Tollmien-Schlichting wave range. 实验结果表明:边界层转捩位置可以用内声激发扰动控制。
- Abstract: The horizontal-longitudinal correlations of low-frequency acoustic field in shallow water are inv-estigated based on experimental data. 文章摘要: 基于一次浅海声学实验数据,研究了浅海低频声场的水平纵向相关特性。
- Objective To understand minute anatomy and adjacent relationship of human internal acoustical meatus(IAM). 目的了解人类内听道的微细解剖,以及毗邻关系。
- 今日热词
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- 深远海浮式风电平台 - deep-sea floating wind power platform
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- 京雄高速公路 - Beijing-Xiongan expressway
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- 农业及相关产业增加值 - the added value of agriculture and related industries
