P225．2 2005042642 提高脉冲鉴相激光近炸引信定距精度技术研究=Research of improving the precision for phase laser proximity fuze [刊,中]／纪铁刚(南京理工大学机械电子工程系．江苏,南京(210094)),张河…／／激光杂志,-2004,25...P225．2 2005042642 提高脉冲鉴相激光近炸引信定距精度技术研究=Research of improving the precision for phase laser proximity fuze [刊,中]／纪铁刚(南京理工大学机械电子工程系．江苏,南京(210094)),张河…／／激光杂志,-2004,25(6),-11-12 介绍了一般激光定距引信的工作原理,当引信在逐渐接近目标的过程中,弹目距离的变化,对目标回波幅度也将造成很大的影响,据此分析了产生定距误差的原因,依此提出了利用辅助发射频率来提高定距精度的方法,该方法对提高激光近炸引信定距精度具有指导作用。图3表1 参5(严寒)展开更多
Underwater Acoustic Sensor Network(UASN) has attracted significant attention because of its great influence on ocean exploration and monitoring. On account of the unique characteristics of underwater environment, loca...Underwater Acoustic Sensor Network(UASN) has attracted significant attention because of its great influence on ocean exploration and monitoring. On account of the unique characteristics of underwater environment, localization, as one of the fundamental tasks in UASNs, is a more challenging work than in terrestrial sensor networks. A survey of the ranging algorithms and the network architectures varied with different applications in UASNs is provided in this paper. Algorithms used to estimate the coordinates of the UASNs nodes are classified into two categories: rangebased and range-free. In addition, we analyze the architectures of UASNs based on different applications, and compare their performances from the aspects of communication cost, accuracy, coverage and so on. Open research issues which would affect the accuracy of localization are also discussed, including MAC protocols, sound speed and time synchronization.展开更多
文摘P225．2 2005042642 提高脉冲鉴相激光近炸引信定距精度技术研究=Research of improving the precision for phase laser proximity fuze [刊,中]／纪铁刚(南京理工大学机械电子工程系．江苏,南京(210094)),张河…／／激光杂志,-2004,25(6),-11-12 介绍了一般激光定距引信的工作原理,当引信在逐渐接近目标的过程中,弹目距离的变化,对目标回波幅度也将造成很大的影响,据此分析了产生定距误差的原因,依此提出了利用辅助发射频率来提高定距精度的方法,该方法对提高激光近炸引信定距精度具有指导作用。图3表1 参5(严寒)
基金supported by National Natural Science Foundation of China under Grants 61001067,61371093and 61172105Natural Science Foundation of Zhejiang Prov.China under Grants LY13D060001
文摘Underwater Acoustic Sensor Network(UASN) has attracted significant attention because of its great influence on ocean exploration and monitoring. On account of the unique characteristics of underwater environment, localization, as one of the fundamental tasks in UASNs, is a more challenging work than in terrestrial sensor networks. A survey of the ranging algorithms and the network architectures varied with different applications in UASNs is provided in this paper. Algorithms used to estimate the coordinates of the UASNs nodes are classified into two categories: rangebased and range-free. In addition, we analyze the architectures of UASNs based on different applications, and compare their performances from the aspects of communication cost, accuracy, coverage and so on. Open research issues which would affect the accuracy of localization are also discussed, including MAC protocols, sound speed and time synchronization.
