排序方式: 共有95条查询结果,搜索用时 265 毫秒
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丰、枯水年磨刀门水道盐水上溯运动规律对比 总被引:3,自引:0,他引:3
通过一维纵向逐时咸界图的方法, 得到了磨刀门水道丰、枯水年的盐水运动规律图.对比分析了不同年份不同上游径流对磨刀门水道盐水上溯运动规律的影响. 分析表明, 丰、枯水年不同的上游径流量将改变磨刀门水道盐水入侵的上溯距离和上溯速度的快慢, 造成程度不同的咸潮灾害. 磨刀门水道中盐水运动的半月及日周期性变化规律不受上游径流的影响,均为小潮期间盐水逐步上溯, 大潮期间盐水逐步退出. 上游径流量的大小只影响磨刀门水道盐水上溯运动的速度和距离远近, 不改变磨刀门水道中盐水上溯运动的半月周期规律. 相似文献
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Genshui Wang Xiangjian Meng Weiming Zheng Xiaoguang Wang Jian Yu Junhao Chu 《International Journal of Infrared and Millimeter Waves》2001,22(2):329-334
In this report, the properties of triglycine sulfate (TGS) crystals doped with urea and L--alanine were studied. Urea and L--alanine have successfully entered into TGS crystal, demonstrated by infrared transmission spectrum and pyroelectric study. Figures of merit and Curie temperature are increased due to these two additions. UrLATGS is more suitable for infrared detectors than pure TGS crystals. 相似文献
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Zhijun Li 《Optics Communications》2008,281(18):4744-4746
Based on Michelson interferometer and phase generated carrier (PGC) homodyne demodulation technique, an optical interferometer system is built, and a novel method using the central angles of Lissajous figures to measure micro-vibration displacement is proposed. The Lissajous figures are obtained by synthesizing two interferometric signals that their vibration directions are orthogonal and their intensities are equal. Through theoretical analysis, software simulation and experimental test, it is concluded that the central angles of Lissajous figures have a linear relationship with the phase modulation coefficients and the micro-vibration displacements when the phase modulation coefficients are small. So the micro-vibration displacements can be directly obtained by measuring the central angles of Lissajous figures. The method is simple and convenient. The experimental results indicate that the micro-vibration displacements measuring range can reach 5-775 nm, with a resolution of about 5 nm. 相似文献