The Arctic sea ice minimum records appeared in the Septembers of 2007 and 2012, followed by high snow cover areas in the Northern Hemisphere winters. The snow cover distributions …
A two-dimensional coupled tide-surge model was used to investigate the effects of tide-surge interactions on storm surges along the coast of the Bohai Sea, Yellow Sea, and East …
本文首先对直杆在太阳下的影长变化进行分析,建立影长变化模型,并画出给定时间和地点的直杆影长变化曲线;其次,根据所给直杆影子顶点的坐标数据,建立经纬度模型并利用遗传算法求解,确定直杆所处的地点及观测日期;最后对所给视频进行采样分析,将采样帧中的影子顶点坐标转化成现实世界中的坐标,然后求出影长,利用经纬度模型求得视频拍摄的地点及日期。
Abstract With global warming and declining Arctic sea ice area in autumn observed by satellites since 1979, anomalous cold snaps in recent winters have affected large parts of …
Satellite-derived sea surface temperature and sea level anomaly data are assimilated into the FIO-ESM. The EAKF-based assimilation system significantly reduces the model bias and …
图像是网络多媒体传播的重要对象,因此网络内图像的所有权、版权认证及内容完整性问题也就成了网络安全亟待解决的问题。为了解决该问题,本文提一种Logistic混沌映射和小波分解相结合的数字水印算法。在水印加密与水印嵌入过程中同时引入混沌映射,使水印的安全性能得到了提升。
Effects of the sharp stratification of fluid density on the nonlinear hydroelastic waves traveling in an infinite elastic plate floating on a two-layer inviscid fluid are …
The 2015/16 El Niño was one of the strongest events on record. This paper reports on the real-time prediction of this event using the First Institute of Oceanography-Earth System …
Most coupled climate models suffer from a severe warm SST bias in the eastern tropical Atlantic. In this study, we investigate the origins of this bias in the Community Earth …