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基于周期性栅结构硬薄板的球体粒子声捕获
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作者 欧阳文乐 邹峰 +3 位作者 何海龙 何兆剑 邓科 赵鹤平 《吉首大学学报(自然科学版)》 CAS 2019年第1期44-47,52,共5页
基于周期性栅结构修饰的声学硬薄板,研究了位于结构板上方的黄铜球体粒子所受到的声辐射力、粒子位置和粒子尺寸对声辐射力的影响.仿真结果表明,当外部声波入射到该非开口硬薄板体系,铜粒子与结构板的距离小于0.5d时,铜粒子将受到声拉... 基于周期性栅结构修饰的声学硬薄板,研究了位于结构板上方的黄铜球体粒子所受到的声辐射力、粒子位置和粒子尺寸对声辐射力的影响.仿真结果表明,当外部声波入射到该非开口硬薄板体系,铜粒子与结构板的距离小于0.5d时,铜粒子将受到声拉力而被捕获,声辐射力密度随粒子尺寸的减小而增大.这种违反直觉的声拉力源于周期性结构硬薄板中无泄漏兰姆波模式所引起的集体激励. 展开更多
关键词 周期性栅结构 硬薄板 球体粒子 声捕获
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A new data acquisition and processing system for profiling sonar
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作者 徐小卡 桑恩方 +1 位作者 乔钢 王继胜 《Journal of Marine Science and Application》 2008年第3期168-173,共6页
A multi-beam chirp sonar based on IP connections and DSP processing nodes was proposed and designed to provide an expandable system with high-speed processing and mass-storage of real-time signals for multi-beam profi... A multi-beam chirp sonar based on IP connections and DSP processing nodes was proposed and designed to provide an expandable system with high-speed processing and mass-storage of real-time signals for multi-beam profiling sonar.The system was designed for seabed petroleum pipeline detection and orientation,and can receive echo signals and process the data in real time,refreshing the display 10 times per second.Every node of the chirp sonar connects with data processing nodes through TCP/IP. Merely by adding nodes,the system’s processing ability can be increased proportionately without changing the software.System debugging and experimental testing proved the system to be practical and stable.This design provides a new method for high speed active sonar. 展开更多
关键词 profiling sonar IP network data acquisition parallel processing DSP
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