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- surface acoustic wave frequency discriminator 表面声波鉴频器
- Acoustic wave frequency 声波频率
- For very high frequency clocks, a surface acoustic wave (SAW) oscillator is preferable. 对于非常高的频率时钟,用声表面波振荡器更好。
- The FEM equation of acoustic wave is used to calculate the air-current natural frequency and pressure pulsation in the pipeline. 利用有限元法求解声学波动方程,建立了管内气流的有限元运动方程,计算出管内气柱的固有频率和气流压力脉动。
- The existence of various defects in the bolt bonding system results in acoustic wave energy attenuation, phase aberration and frequency scattering. 摘要锚固体系中存在不同大小和程度的缺陷时,声波在传播过程中将产生能量衰减、相位突变及频散现象。
- We have ten main patent rights about SAWF, such as low-loss surface wave intermediate frequency filters and surface acoustic wave duplexer for wireless telephone. 拥有通信用低插损声表面波中频滤波器、无绳电话用声表面波双工器等十项核心专利技术。
- Using the Normal Model Theory and Wavenumber Integration Method, a low frequency acoustic wave propagation model in shallow sea of multi-layered media is constituted. 应用简正波理论并结合波数积分法,建立了浅海低频声传播特性的仿真数学模型。
- Surface acoustic wave (SAW) devices have been widely used in modern communication technology due to its small size and better performance in the frequency above gigahertz. 表面声波元件因其体积较小及适合于高频时使用的优势,已广泛为目前通讯产品如手机等所使用。近年来,随著通讯产业的发展,所须操作的频率越来越高,对于能操作在超高频段的表面声波滤波器的研究变成一个热门的领域。
- The wavelet transform is of good localization property in the domain of time and frequency, which provides a comprehensive application in processing acoustic wave. 小波变换同时有在时间域和频率域对信号进行局部化的特点,使其在声波信号处理中有着广泛的应用前景。
- A pulse acoustic wave and its relationship with OAO flurescence are recorded. 记录了CO_2脉冲激光激发BCl_3分子时形成的脉冲声波,及其与OAO荧光的对应关系。
- J.F. Rosenbaum, “Bulk Acoustic Wave Theory and Devices,” Artech House, 1988. 钟曜光,“压电式微超音波感测器,”国立台湾大学机械工程研究所,民国90年。
- Influence of Acoustic Wave Attenuation on the Properties of Fiber AOTF[J]. 引用该论文 厉群;刘小明;李佟;金韬;周炳琨.
- The coefficient of variation (CV) of slow wave frequency and abnormal rhythm index (ARI) increased obviously. 慢波频率变异系数(CV)及异常节律指数(ARI)显著增加;
- Express the factors resulting in the attenuation of acoustic waves. 叙述引起音波衰减的因素。
- The transduction of acoustic waves into voltages by a microphone. 声波被麦克风转换为电压。
- The radiation wave frequency of semiconductor laser is shifted correspondently when the injecting current is changed. 半导体异质结激光器在注入的电流发生变化时,输出激光的光频也随之改变。
- The researchers may through expose the waterdrop under the different sound wave frequency may control its vibrational frequency. 研究人员可通过将水滴暴露于不同的声波频率下可以控制其振动频率。
- Use method (1) named "the programmable trapping wave", which is merged with frequency spectrum convert in linear ,Direct Digit Synthesizer and Surface Acoustic Wave Filter, to open a communication band in jam-band willfully. 使用融合了线性频谱搬移技术、数字频率合成技术以及声表面波滤波技术的“可编程陷波法”,在干扰频段内任意开辟出通讯频段窗口;
- The relation between collisional absorption of the EM-wave and the plasma density, plasma collision frequency, and incident wave frequency is obtained. 给出了不均匀非磁化等离子体密度、等离子体碰撞频率、电磁波频率与碰撞吸收的关系。
- The microphone converts acoustic waves to electrical singals for transmission. 麦克风将声波转化成电信号进行传播。