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68篇 您的检索式:作者名="Shuanggen"
    题名 作者 年代 出处 被引量
1Efficient and Provably Secure Multi-Recipient Signcryption from Bilinear Pairings显示文摘Signcryption is a cryptographic primitive that performs signature and encryption simultaneously, at lower computational costs and communication overheads than the signature-then- en- cryption approach. In this paper, we propose an efficient multi-recipient signcryption scheme based on the bilinear pairings, which broadcasts a message to multiple users in a secure and au- thenticated manner. We prove its semantic security and unforge- ability under the Gap Diffie-Hellman problem assumption in the random oracle model. The proposed scheme is more efficient than re-signcrypting a message n times using a signcryption scheme in terms of computational costs and communication overheads.LI Fagen HU Yupu LIU Shuanggen 2007Wuhan University Journal of Natural Sciences2007,12,1:5
2PPP models and performances from single-to quad-frequency BDS observations显示文摘Nowadays,China BeiDou Navigation Satellite System(BDS)has been developed well and provided global services with highly precise positioning,navigation and timing(PNT)as well as unique short-message communication,particularly global system(BDS-3)with higher precision multi-frequency signals.The precise point positioning(PPP)can provide the precise position,receiver clock,and zenith tropospheric delay(ZTD)with a stand-alone receiver compared to the traditional double differenced relative positioning mode,which has been widely used in PNT,geodesy,meteorology and so on.However,it has a lot of challenges for multi-frequency BDS PPP with different strategies and more unknown parameters.In this paper,the detailed PPP models using the single-,dual-,triple-,and quad-frequency BDS observations are presented and evaluated.Firstly,BDS system and PPP method are introduced.Secondly,the stochastic models of time delay bias in BDS-2/BDS-3 PPP including the neglection,random constant,random walk and white noise are presented.Then,three single-frequency,four dual-frequency,four triple-frequency and four quad-frequency BDS PPP models are provided.Finally,the BDS PPP models progress and performances including theoretical comparison of the models,positioning performances,precise time and frequency transfer,ZTD,inter-frequency bias(IFB)and differential code bias(DCB)are presented and evaluated as well as future challenges.The results show that the multi-frequency BDS observations will greatly improve the PPP performances.Shuanggen Jin Ke Su 2020Satellite Navigation2020,1,1:3
3Present-day spreading motion of the mid-Atlantic ridge显示文摘Over a long period of time, the spreading rate of the mid-Atlantic ridge has been ascertained by the geological age of the magnetic stripe laid out on either side of the mid-ocean ridge in conjunction with the annals of the magnetic reversal history. Is the mid-Atlantic ridge still spreading today? How fast is it moving or are there any changes? All these questions remain unsolved. Based on the newest ITRF2000 velocity field published by the International Earth Rotation Service (IERS), the contemporary global plate motion model ITRF2000VEL is constructed, independent of any plate model hypothesis. Solutions for relative Euler’s vectors of plate pairs as North America-Eurasia, North America-Africa and South America-Africa are obtained, implying current spreading rates of the mid-Atlantic ridge. Comparing them with results from the NNR-NUVEL1A model displays the present-day motion characteristics of the mid-Atlantic ridge that the mid-ridge of the South Atlantic, whose spreading is slowing down, spreadsShuanggen Jin Wenyao Zhu 2002Chinese Science Bulletin2002,47,18:2
4Water storage variations in the Poyang Lake Basin estimated from GRACE and satellite altimetry显示文摘The Gravity Recovery and Climate Experiment(GRACE) satellite mission provides a unique opportunity to quantitatively study terrestrial water storage(TWS) variations. In this paper,the terrestrial water storage variations in the Poyang Lake Basin are recovered from the GRACE gravity data from January 2003 to March 2014 and compared with the Global Land Data Assimilation System(GLDAS) hydrological models and satellite altimetry. Furthermore, the impact of soil moisture content from GLDAS and rainfall from the Tropical Rainfall Measuring Mission(TRMM) on TWS variations are investigated. Our results indicate that the TWS variations from GRACE, GLDAS and satellite altimetry have a general consistency. The TWS trends in the Poyang Lake Basin determined from GRACE, GLDAS and satellite altimetry are increasing at 0.0141 km^3/a, 0.0328 km^3/a and 0.0238 km^3/a,respectively during the investigated time period. The TWS is governed mainly by the soil moisture content and dominated primarily by the precipitation but also modulated by the flood season of the Yangtze River as well as the lake and river exchange water.Yang Zhou Shuanggen Jin Robert Tenzer Jialiang Feng 2016Geodesy and Geodynamics2016,7,2:2
5Thermospheric mass density derived from CHAMP satellite precise orbit determination data based on energy balance method显示文摘In this article, the energy balance method is used to retrieve thermospheric mass density from CHAMP satellite precise orbit determination(POD) data during 2007–2009. The retrieved thermospheric mass densities are compared with those from accelerometer data and an empirical model. The main conclusions are as follows:(1) Thermospheric mass density can be retrieved from POD data by the energy balance and semi-major axis decay methods, whose results are consistent.(2) The accuracy of the retrieved densities depends on the integration time period, and the optimal period for CHAMP density retrieval from POD data is about 20 minutes.(3) The energy balance method can be used to calibrate accelerometer data.(4) The accuracy of retrieving thermospheric density from POD data varies with satellite altitude and local time.LI RuoXi LEI JiuHou WANG XiJing DOU XianKang JIN ShuangGen 2017Science China Earth Sciences2017,60,8:2
6Multi-Proxy Signature Without Random Oracles显示文摘YU Yong SUN Ying YANG Bo XU Chunxiang LIU Shuanggen 2008Chinese Journal of Electronics2008,17,3:2
7Evaluation of ocean tide loading effects on GPS-estimated precipitable water vapour in Turkey显示文摘Global Positioning System(GPS) has been widely used to estimate the total zenith tropospheric delay(ZTD) and precipitable water vapour(PWV) for weather prediction and atmospheric research as a continuous and all-weather technique.However,estimations of ZTD and PWV are subject to effects of geophysical models with large uncertainties,particularly imprecise ocean tide models of inland seas in Turkey.In this paper,GPS data from Jan.1,2010 to Dec.31,2011 are processed using GAMIT/GLOBK at four co-located GPS stations(ISTN,ERZR,SAMN,and IZMI) with Radiosonde from the Turkish Met-Office together with several nearby IGS stations.Four widely used ocean tide models are adopted to evaluate their effects on GPS-estimated PWV,such as IERS recommended FES2004,NAO99 b,CSR4.0 and GOT00.Five different strategies are taken without ocean tide model and with four ocean tide models,respectively,which are used to evaluate ocean tide models effects on GPS-estimated PWV through comparing with co-located Radiosonde.Results showed that ocean tide models have greatly affected the estimation of the precipitable water vapour at stations near coasts.The ocean tide model FES2004 gave the best results when compared to Radiosonde with ±2.12 mm in PWV at stations near coastline.While other ocean tides models agree each other at millimeter level in PWV.However,at inland GPS stations,ocean tide models have less effect on GPS-estimated PWV.Ourbuz Gokhan Shuanggen Jin 2016Geodesy and Geodynamics2016,7,1:2
8Sea level change along the Black Sea coast from satellite altimetry, tide gauge and GPS observations显示文摘Sea level change affects human living conditions,particularly ocean coasts.However,sea level change is still unclear along the Black Sea coast due to lack of in-situ measurements and low resolution satellite data.In this paper,sea level change along the Black Sea coast is investigated from joint satellite altimetry,tide gauge(TG) and Global Positioning System(GPS) observations.The linear trend and seasonal components of sea level change are estimated at 8 TG stations(Amasra,Igneada,Trabzon-Ⅱ,Sinop,Sile,Poti,Tuapse,and Batumi) located along the Black Sea coast,which are compared with Satellite Altimetry and GPS.At the tide gauge stations with long-term records such as Poti(about 21 years) and Tuapse(about 19 years),the results obtained from the satellite altimetry and tide gauge observations show a remarkably good agreement.While some big differences are existed between Satellite Altimetry and TG at other stations,after adding vertical motion from GPS,correlation coefficients of the trend have been greatly improved from 0.37 to 0.99 at 3co-located GPS and TG stations(Trabzon-Ⅱ,Sinop and Sile).Nevin B. Avsar Shuanggen Jin Hakan Kutoglu Ookhan Ourbuz 2016Geodesy and Geodynamics2016,7,1:2
9Preface: Recent progresses on Beidou/COMPASS and other Global Navigation Satellite Systems (GNSS) – II显示文摘Shuanggen Jin 2014Advances in Space Research2014,,5:1
10An evaluation of potential solar radio emission power threat on GPS and GLONASS performance显示文摘Vladislav V. Demyanov Edward L. Afraimovich Shuanggen Jin 2012GPS Solutions2012,,4:1
11Recent progresses on Beidou/COMPASS and other global navigation satellite systems (GNSS) – I显示文摘Shuanggen Jin 2012Advances in Space Research2012,,:1
12Analysis on Precipitation Efficiency of the “21.7” Henan Extremely Heavy Rainfall Event显示文摘A record-breaking heavy rainfall event that occurred in Zhengzhou,Henan province during 19–21 July 2021 is simulated using the Weather Research and Forecasting Model,and the large-scale precipitation efficiency(LSPE)and cloud-microphysical precipitation efficiency(CMPE)of the rainfall are analyzed based on the model results.Then,the key physical factors that influenced LSPE and CMPE,and the possible mechanisms for the extreme rainfall over Zhengzhou are explored.Results show that water vapor flux convergence was the key factor that influenced LSPE.Water vapor was transported by the southeasterly winds between Typhoon In-Fa(2021)and the subtropical high,and the southerly flow of Typhoon Cempaka(2021),and converged in Zhengzhou due to the blocking by the Taihang and Funiu Mountains in western Henan province.Strong moisture convergence centers were formed on the windward slope of the mountains,which led to high LSPE in Zhengzhou.From the perspective of CMPE,the net consumption of water vapor by microphysical processes was the key factor that influenced CMPE.Quantitative budget analysis suggests that water vapor was mainly converted to cloud water and ice-phase particles and then transformed to raindrops through melting of graupel and accretion of cloud water by rainwater during the heavy precipitation stage.The dry intrusion in the middle and upper levels over Zhengzhou made the high potential vorticity descend from the upper troposphere and enhanced the convective instability.Moreover,the intrusion of cold and dry air resulted in the supersaturation and condensation of water vapor,which contributed to the heavy rainfall in Zhengzhou.Lei YIN Fan PING Jiahua MAO Shuanggen JIN 2023Advances in Atmospheric Sciences2023,40,3:1
13Water storage changes and balances in Africa observed by GRACE and hydrologic models显示文摘Continental water storage plays a major role in Earth's climate system.However,temporal and spatial variations of continental water are poorly known,particularly in Africa.Gravity Recovery and Climate Experiment(GRACE) satellite mission provides an opportunity to estimate terrestrial water storage(TWS) variations at both continental and river-basin scales.In this paper,seasonal and secular variations of TWS within Africa for the period from January 2003 to July 2013 are assessed using monthly GRACE coefficients from three processing centers(Centre for Space Research,the German Research Centre for Geosciences,and NASA's Jet Propulsion Laboratory).Monthly grids from Global Land Data Assimilation System(GLDAS)-1 and from the Tropical Rainfall Measuring Mission(TRMM)-3B43 models are also used in order to understand the reasons of increasing or decreasing water storage.Results from GRACE processing centers show similar TWS estimates at seasonal timescales with some differences concerning inter-annual trend variations.The largest annual signals of GRACE TWS are observed in Zambezi and Okavango River basins and in Volta River Basin.An increasing trend of 11.60 mm/a is found in Zambezi River Basin and of 9 mm/a in Volta River Basin.A phase shift is found between rainfall and GRACE TWS(GRACE TWS is preceded by rainfall) by 2-3 months in parts of south central Africa.Comparing GLDAS rainfall with TRMM model,it is found that GLDAS has a dry bias from TRMM model.Ayman Hassan Shuanggen Jin 2016Geodesy and Geodynamics2016,7,1:1
14An Improvement of GPS Height Estimations:Stochastic Modeling显示文摘Jin Shuanggen Wang J Pil-Ho Park 2005Earth Planets Space2005,57,4:1
15Automatic detection of impact craters on Mars using a modified adaboosting method 显示文摘Jin Shuanggen Zhang Tengyu 2014Planetary and Space Science2014,99,9:1
16An improvement of GPS height estimation: stochastic modeling显示文摘JIN Shuanggen WANG J PARK P H 2005Earth Planets Sapce2005,57,:1
17M_DCB : Matlab Code for Estimating GNSS Satellite and Receiver Differential Code Biases显示文摘JIN R JIN Shuanggen FENG Guiping 2012GPS Solutions2012,16,4:1
18Interaction between subducted continental crust and the mantle显示文摘Shuguang Li Yonghong Nie Deliang Liu Shuanggen Zheng 1998Science in China Series D: Earth Sciences1998,,5:1
19A New Related-Key Square Attack on 7-Round and 8-Round AES-192显示文摘CHEN Jie HU Yupu WEI Yongzhuang LIU Shuanggen 2008Chinese Journal of Electronics2008,17,1:1
20Interaction between subducted continental crust and the mantle显示文摘Shuguang Li Yonghong Nie Deliang Liu Shuanggen Zheng 1998Science in China Series D: Earth Sciences1998,,5:1
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