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- Tannuri E A, Sparano J V, Simos A N,et al.Estimating directional wave spectrum based on stationary ship motion measurements. 马志良;罗德涛;主编.;近海移动式平台
- Davidson M A, Huntley D A and Bird P A D. A practical method for the estimation of directional wave spectra in reflective wave fields[J]. Coastal Engineering, 1998,33, 91-116. 302-311. 三传感器波浪水槽二次反射主动吸收方法是加拿大科学院水力中心最近开发的一种水槽反射波控制技术。
- directional wave spectrum 方向波谱
- This method is to detect and track direct wave at receiving station.Received direct signals are integrated incoherently, filtered, made analysis of spectrum and then time synchronous signals are got. 在接收站对直达波进行检测和跟踪,再经非相干积累、滤波、谱分析等处理来提取同步信号,分析其性能。
- A boundary of the model's wave spectrum is obtained by the use of self nested method. 利用自嵌套的方式,提供模式波谱边界条件;
- Venation wave spectrum analysis finds out shape-structure change of mid-frequency signal fluctuation. 脉络波谱图分析查明了中范围(频率)信号波动的形态结构变化。
- Using the above relations, this paper has compared several wave spectrum formular with actual spectrum, and the result is satisfactory. 同时用上述关系式对目前工程上常用的几种海浪谱计算公式进行了对比分析,并与实测谱进行了比较,结果表明所得关系式与实际拟合良好。
- The time lag between the direct wave and the scattered wave could be computed by using the simplex algorithm method. 当弯曲波在传递时遇到平板裂缝则会产生散射波,因此含有裂缝平板的板波讯号即包括弯曲波的直接波传与裂缝引起的散射波传。
- By analyzing the reflectivity spectrum and reflection wave spectrum of thin beds, we put forward a new method for thickness determination of the thin beds. 作者通过研究地层厚度变化对地层本身的反射系数谱及反射波频谱的影响规律,寻找到了一种新的计算薄层厚度的方法。
- Using the concept of directional wave fields, the characteristics of the wave field around a detached breakwater were studied. 摘要本研究利用方向频谱探论离岸堤周围波场的特性。
- The test result indicate that it is able to competent at wave simulation of sea wave spectrum for shipmodel test,and can simulate different wave spectrum in different request. 实验数据的分析结果表明,该造波机完全可以胜任船模耐波性试验的要求,并且还可以根据需要模拟不同的海浪谱,模拟精度达到了实验的要求。
- In this paper, we present the basic principle of dual flap wave-maker and the producing of driving signal firstly, and then the influence of two distinct FFT methods with the same wave signal to the primary parameters of wave spectrum. 摘要叙述了采用双摇板造波系统的基本思想及双摇板造波信号的生成,并分析了同一波浪信号用不同谱分析法对所得主要谱参数的影响。
- Conclusion High-quality wave spectrum depends on high uniformity of magnetic field.The value of full width at half maxium is an important factor that reflects the uniformity of magnetic field. 结论 获得高质量的波谱,需要较高的磁场均匀度,而半高宽是反映均匀度的一个重要指标。
- In order to improve signal-to-noise ratio(SNR)in electric-magnetic vibroseis seismic prospecting, a phased-array vibroseis system that can generate a directional wave was developed. 为提高可控震源地震勘探数据的信噪比,采用能够产生定向地震波的相控震源,针对水平层状地下介质模型,给出了不同信噪比条件下的单震源、相控震源信号检测结果。
- Crosswell seismic wavefield contains different wave such as reflection waves, direct waves, and tube waves. 井间地震波场丰富,含有反射波、直达波和管波等多种波型。
- In this paper,a series of random waves has been generated by the JONSWAP wave spectrum and the histories of continuous and long-lasting random wave forces are bu. 利用海浪谱JONSWAP谱生成随机波浪,并结合改进的波浪力时程模型生成一个连续的、持续时间相对较长的随机波浪力作用过程。
- The shape and energy distribution of direct wave is mainly influenced by drift,while the energy distribution of reflected wave is influenced mainly by the interface between coal and rock. 巷道对各道直达波能量分布及波列形状有明显影响 ; 煤岩分界面主要影响反射波能量分布。
- This paper uses the Quadratic/Linear Traveltime Interpolation (QLTI) ray tracing method to get the traveltime of the headwave including direct wave, reflection wave, and refraction wave. 采用旅行时线性/二次联合插值射线追踪算法(QLTI算法)对包括直达波、折射波、透射波在内的多种射线进行追踪,得到井间层析成像的旅行时,它的突出优点是精度高。
- It uses the time-frequency localization characteristic of the wavelet analysis and their correlations on the direct wave,target reflected signals and stochastic noise in multichannel GPR d... 通过实验数据和现场实测数据验证了该方法的有效性。
- She cast her eyes down to avoid direct eye contact. 她垂下双目以避免对视。