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| 1 | A coarse-to-fine image registration method based on visual attention model显示文摘Image registration is fundamental and crucial to remote sensing.However getting highly accurate registration performance automatically and fast for large-field images consistently is a challenge.As a work around to this problem,we propose a new image registration concept based on visual attention in this paper.This concept employs the advantages of feature-based or area-based methods to improve the precision and efficiency of image registration.The key concept of proposed integrated scheme is to make optimum use of the highly prominent details in the full scene by means of visual attention computational mechanism.To testify the validation,comparisons with other classical methods are carried out on real-world images.The experimental results show that the proposed method can effectively perform on multi-view/multi-temporal remote sensing images with outstanding precision and time saving performance. | FENG Jing MA Long BI FuKun ZHANG XueJing CHEN He | 2014 | Science China(Information Sciences)2014，57，12： | 5 |
| 2 | Distribution and origin of brine-type Li-Rb mineralization in the Qaidam Basin,NW China显示文摘The Qaidam Basin on the Qinghai-Tibet Plateau is well endowed with a variety of critical metals,such as Li and Rb.However,little is known about the distribution,source,and enrichment mechanisms of these elements.In this paper,we present results of systematic geochemical and H-O-B isotopic analyses of brines in the Tertiary and Quaternary sediments of the Qaidam basin.The results reveal that the paleobrines from oil-bearing anticlines at Dafengshan,Nanyishan,Youquanzi,Jiandingshan,and Jianshishan are significantly enriched in Li and Rb,whose contents are 81.1-128.9 mg L^(-1)and 4.5-29.2 mg L^(-1),respectively,reaching levels of economic significance.High Rb contents(up to 12.5 mg L^(-1))and well-endowment of Li also characterize the Dongtai,Xitai,Yiliping,and Senie salt lakes in the Qaidam Basin.The Tertiary paleobrine average inδD andδ18O at-40.7‰and 2.84‰,respectively.The paleobrine with the highest Li and Rb hasδD andδ^(18)O values close to magmatic water.Theδ^(11)B values are lower than those of river water but close to those of geothermal fluids,suggesting that replenishment by deep magmatic hydrothermal fluid is most likely the key mechanism for the anomalous enrichment of these elements in the paleobrines,though evaporation and water-rock reactions have contributed to the critical metal mineralization.The anomalous enrichment of Li and Rb in modern salt lake brines is closely related to the input of volcanic geothermal water.The relatively high Li and Rb contents of intercrystalline brines in salt lakes of the western Qaidam Basin and the increase of Li and Rb contents with increasing depth were caused by upwelling of local paleobrines along the fault zones. | Jiansen LI Tingwei LI Yunqi MA Fukun CHEN | 2022 | Science China Earth Sciences2022，65，3： | 1 |
| 3 | A novel sea-land segmentation based on integral image reconstruction in MWIR images显示文摘Dear editor,Middle wave infrared remote(MWIR)technology is the main approach in remote sensing applications,because thermal infrared can work all-time.The MWIR technology can provide valid object information in remote sensing technology than optical and synthetic aperture radar(SAR) | Yin ZHUANG Dechun GUO He CHEN Fukun BI Long MA Nouman Q.SOOMRO | 2017 | Science China(Information Sciences)2017，60，6： | 0 |
| 4 | Graphitic carbon nitride, a saturable absorber material for the visible waveband显示文摘For the first time to our knowledge, graphitic carbon nitride(g-C_3N_4) nanosheets are found to be an excellent saturable absorber material in the visible waveband. g-C_3N_4 exhibits much stronger saturable absorption in this region than in the near-infrared region, unlike other two-dimensional materials such as graphene and black phosphorus. By the Z-scan method, the nonlinear absorption coefficient β of the material is first measured at three visible wavelengths, and for g-C_3N_4 it is -2.05,-0.34, and -0.11 cm · GW^(-1) at 355, 532, and 650 nm,respectively. These are much larger than -0.06 cm · GW^(-1) at 1064 nm. | MENGXIA WANG FUKUN MA ZHENGPING WANG DAWEI HU XINGUANG XU XIAOPENG HAO | 2018 | Photonics Research2018，6，4： | 0 |
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