Target-strength measurements of walleye pollock (Theragra chalcogramma) and Pacific whiting (Merluccius productus)     

Traynor  Jimmie J. 《ICES Journal of Marine Science》1996,53(2):253-258

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Three-dimensional visualization of a widow rockfish (Sebastes entomelas) shoal over interpolated bathymetry     

Stanley  R. D.; Kieser  R.; Hajirakar  M. 《ICES Journal of Marine Science》2002,59(1):151-155

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Comparing two 38-kHz scientific echosounders     

Jech  J. Michael; Foote  Kenneth G.; Chu  Dezhang; Hufnagle  Lawrence C.  Jr. 《ICES Journal of Marine Science》2005,62(6):1168-1179

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Spatial and temporal variability of Antarctic krill: implications for stock assessment     

McClatchie  Sam; Greene  Charles H.; Macaulay  Michael C.; Sturley  Darrell R.M. 《ICES Journal of Marine Science》1994,51(1):11-18

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Investigation on a two-part underwater manoeuvrable towed system     

Jiaming Wu  Allen T. Chwang 《Ocean Engineering》2001,28(8)

A hydrodynamic model of a two-part underwater manoeuvrable towed system is proposed in which a depressor is equipped with active horizontal and vertical control surfaces, and a towed vehicle is attached to the lower end of a primary cable. In such a system the towed vehicle can be manoeuvred in both vertical and horizontal planes when it is towed at a certain velocity and the coupling effect of excitations at the upper end of the primary cable and disturbances of control manipulations to the towed vehicle can be reduced. In the model the hydrodynamic behavior of an underwater vehicle is described by the six-degrees-of-freedom equations of motion for submarine simulations. The added masses of an underwater vehicle are obtained from the three-dimensional potential theory. The control surface forces of the vehicle are determined by the wing theory. The results indicate that with relative simple control measures a two-part underwater manoeuvrable towed system enables the towed vehicle to travel in a wide range with a stable attitude. The method in this model gives an effective numerical approach for determining hydrodynamic characteristics of an underwater vehicle especially when little or no experimental data are available or when costs prohibit doing experiments for determining these data.  相似文献   

深海超短基线声学定位系统计算目标水平距离的一种新方法   总被引：3，自引：0，他引：3  

荀俊姑  郭纪捷 《海洋技术学报》1997,16(4):17-22

对深海环境中工作的潜器或设备载体进行定位测量是深海调查的重要任务之一，本文基于射线声学原理对超基线声学定位系统的定位数据提出了一种迭代处理算法，能够得到非常精确的水平距离测量结果，这种方法对于大洋调查的深拖系统和其他下水设备定位有重要的现实意义。  相似文献   

Dynamics and control of towed underwater vehicle system, part II: model validation and turn maneuver optimization     

C. Lambert  M. Nahon  B. Buckham  M. Seto 《Ocean Engineering》2003,30(4):471-485

This paper presents a validation of a three-dimensional dynamics model of a towed underwater vehicle system and discusses an application of the model to improve the performance of the system during a turn maneuver. The model was validated by comparing its results to experimental sea trial data, as well as to results from another independently developed simulation. The dynamics model was then imbedded in an optimization routine. This routine was used to vary turn radii in order to improve the U-turn performance. Significant improvements were obtained relative to a standard semicircular turn geometry.  相似文献   

Diel variability of school structure with special reference to transition periods   总被引：3，自引：4，他引：3  

Freon  P.; Gerlotto  F.; Soria  M. 《ICES Journal of Marine Science》1996,53(2):459-464

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水下爆破切割装置研究     

彭学伦 《海洋技术学报》2005,24(2):80-83

介绍一种水下爆破切割装置的组成、特点、工作原理及试验情况,并对水压引信、水下聚能定向爆破等关键技术进行了有益的探讨。  相似文献   

利用非线性声学测量冰厚的方法研究     

崔华义 《海洋技术学报》2005,24(3):58-60

文章介绍了利用非线性声学原理和声纳测距原理测量海冰上下界面信息的技术和方法,并根据海冰的声学特性计算海冰的厚度.  相似文献