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| 1 | Identity-based public auditing for cloud storage systems against malicious auditors via blockchain显示文摘Cloud storage systems provide users with convenient data storage services, which allow users to access and update outsourced data remotely. However, these cloud storage services do not guarantee the integrity of the data that users store in the cloud. Thus, public auditing is necessary, in which a third-party auditor(TPA) is delegated to audit the integrity of the outsourced data. This system allows users to enjoy on-demand cloud storage services without the burden of continually auditing their data integrity. However,certain TPAs might deviate from the public auditing protocol and/or collude with the cloud servers. In this article, we propose an identity-based public auditing(IBPA) scheme for cloud storage systems. In IBPA,the nonces in a blockchain are employed to construct unpredictable and easily verified challenge messages,thereby preventing the forging of auditing results by malicious TPAs to deceive users. Users need only to verify the TPAs' auditing results in batches to ensure the integrity of their data that are stored in the cloud.A detailed security analysis shows that IBPA can preserve data integrity against various attacks. In addition,a comprehensive performance evaluation demonstrates that IBPA is feasible and efficient. | Jingting XUE Chunxiang XU Jining ZHAO Jianfeng MA | 2019 | Science China(Information Sciences)2019，62，3： | 17 |
| 2 | Quantum secure direct communication and authentication protocol with single photons显示文摘A quantum secure direct communication and authentication protocol is proposed by using single photons.An information transmission is completed by sending photons once in quantum channel,which improves the efficiency without losing the security.The protocol encodes identity-string of the receiver as single photons sequence,which acts as detection sequence and implements authentication.Before secret message is encoded as single photons sequence,it is encrypted with identity-string of the sender by using XOR operation,which defends quantum teleportation attack efficiently.The base identity-strings of the sender and the receiver are reused unconditionally secure even in noisy channel.Compared with the protocol proposed by Wang et al.(Phys Lett A,2006,358:256–258),the protocol in this study sends photons once in one transmission and defends most attacks including‘man-in-the-middle’attack and quantum teleportation attack efficiently. | CHANG Yan XU ChunXiang ZHANG ShiBin YAN LiLi | 2013 | Chinese Science Bulletin2013，58，36： | 16 |
| 3 | Controlled quantum secure direct communication and authentication protocol based on five-particle cluster state and quantum one-time pad显示文摘A controlled quantum secure direct communication and authentication protocol is proposed with a quantum one-time pad based on five-particle cluster state.Photon 4 in each five-particle cluster state is sent to the controller as permission.Unitary operation I(U)on photon4 according to identity-string of the receiver is used to forbid the controller to deduce secret message.The classical XOR operation serving as a one-time-pad is used to forbid external eavesdroppers to eavesdrop.Eavesdropping detection and identity authentication are implemented by previously shared reusable base identity-strings.In one transmission,one qubit of each five-particle cluster state is used as controller’s permission,and two qubits are used to transmit two classical bit information. | Yan Chang Chunxiang Xu Shibin Zhang Lili Yan | 2014 | Chinese Science Bulletin2014，59，21： | 13 |
| 4 | Risk analysis for the highly pathogenic avian influenza in China's Mainland using meta-modeling显示文摘A logistic model was employed to correlate the outbreak of highly pathogenic avian influenza (HPAI) with related environmental factors and the migration of birds. Based on MODIS data of the normalized difference vegetation index, environmental factors were considered in generating a probability map with the aid of logistic regression. A Bayesian maximum entropy model was employed to explore the spatial and temporal correlations of HPAI incidence. The results show that proximity to water bodies and national highways was statistically relevant to the occurrence of HPAI. Migratory birds, mainly waterfowl, were important infection sources in HPAI transmission. In addition, the HPAI outbreaks had high spatiotemporal autocorrelation. This epidemic spatial range fluctuated 45 km owing to different distribution patterns of cities and water bodies. Furthermore, two outbreaks were likely to occur with a period of 22 d. The potential risk of occurrence of HPAI in China's Mainland for the period from January 23 to February 17, 2004 was simulated based on these findings, providing a useful meta-model framework for the application of environmental factors in the prediction of HPAI risk. | CAO ChunXiang XU Min CHANG ChaoYi XUE Yong ZHONG ShaoBo FANG LiQun CAO WuChun ZHANG Hao GAO MengXu HE QiSheng ZHAO Jian CHEN Wei ZHENG Sheng LI XiaoWen | 2010 | Chinese Science Bulletin2010，55，36： | 9 |
| 5 | Regional and Global Land Data Assimilation Systems: Innovations,Challenges, and Prospects显示文摘Since the North American and Global Land Data Assimilation Systems(NLDAS and GLDAS) were established in2004, significant progress has been made in development of regional and global LDASs. National, regional, projectbased, and global LDASs are widely developed across the world. This paper summarizes and overviews the development, current status, applications, challenges, and future prospects of these LDASs. We first introduce various regional and global LDASs including their development history and innovations, and then discuss the evaluation, validation, and applications(from numerical model prediction to water resources management) of these LDASs. More importantly, we document in detail some specific challenges that the LDASs are facing: quality of the in-situ observations, satellite retrievals, reanalysis data, surface meteorological forcing data, and soil and vegetation databases; land surface model physical process treatment and parameter calibration; land data assimilation difficulties; and spatial scale incompatibility problems. Finally, some prospects such as the use of land information system software, the unified global LDAS system with nesting concept and hyper-resolution, and uncertainty estimates for model structure,parameters, and forcing are discussed. | Youlong XIA Zengchao HAO Chunxiang SHI Yaohui LI Jesse MENG Tongren XU Xinying WU Baoqing ZHANG | 2019 | Journal of Meteorological Research2019，33，2： | 7 |
| 6 | Applicability Assessment of the 1998–2018 CLDAS Multi-Source Precipitation Fusion Dataset over China显示文摘Traditional hourly rain gauges and automatic weather stations rarely measure solid precipitation, except for those stations with weighing-type precipitation sensors. Microwave remote sensing has only a low ability to retrieve solid precipitation. In addition, there are no long-term, high-quality precipitation data in China that can be used to drive land surface models. To address these issues, in the China Meteorological Administration(CMA) Land Data Assimilation System(CLDAS), we blended the Climate Prediction Center(CPC) morphing technique(CMORPH) and Modern-Era Retrospective analysis for Research and Applications version 2(MERRA2) precipitation datasets with observed temperature and precipitation data on various temporal scales using multigrid variational analysis and temporal downscaling to produce a multi-source precipitation fusion dataset for China(CLDAS-Prcp). This dataset covers all of China at a resolution of 6.25 km at hourly intervals from 1998 to 2018. We performed dependent and independent evaluations of the CLDAS-Prcp dataset from the perspectives of seasonal total precipitation and land surface model simulation. Our results show that the CLDAS-Prcp dataset represents reasonably the spatial distribution of precipitation in China. The dependent evaluation indicates that the CLDAS-Prcp performs better than the MERRA2 precipitation, CMORPH precipitation, Global Land Data Assimilation System version 2(GLDAS-V2.1) precipitation,and CLDAS-V2.0 winter precipitation, as compared to the meteorological observational precipitation. The independent evaluation indicates that the CLDAS-Prcp dataset performs better than the Global Precipitation Measurement(GPM) precipitation dataset and is similar to the CLDAS-V2.0 summer precipitation dataset based on the hydrological observational precipitation. The simulated soil moisture content driven by CLDAS-Prcp is slightly better than that driven by the CLDAS-V2.0 precipitation, whereas the snow depth simulation driven by CLDAS-Prcp is much better than that driven by the CLDAS-V2.0 precipitation. This is because the CLDAS-Prcp data have included solid precipitation. Overall, the CLDAS-Prcp dataset can meet the needs of land surface and hydrological modeling studies. | Shuai SUN Chunxiang SHI Yang PAN Lei BAI Bin XU Tao ZHANG Shuai HAN Lipeng JIANG | 2020 | Journal of Meteorological Research2020，34，4： | 7 |
| 7 | Synergistic graphene/aluminum surface plasmon coupling for zinc oxide lasing improvement显示文摘免费电子的集体摆动在材料的表面上产生电浆子。耳语画廊 microcavity 有效地从它的内部墙基于全部的思考在它的表面上限制轻地。当这些二种电磁波遇见对方时,多于在耳语画廊 microcavity 与 graphene 和艾尔 nanoparticles 的单层是涂的以后, 50 褶层和阀值被减少,从单个 ZnO microrod 的刺激排出物被提高。放射激光的表演的改进被归因于与 ZnO 激子 graphene/Al 表面电浆子联合的 synergistic 精力。放射激光的特征和联合机制系统地被调查。 | Qiuxiang Zhu Feifei Qin Junfeng Lu Zhu Zhu Haiyan Nan Zengliang Shi Zhenhua Ni Chunxiang Xu | 2017 | Nano Research2017，10，6： | 6 |
| 8 | Microstructure and corrosion behavior of Mg-Zn-Y-Al alloys with long-period stacking ordered structures显示文摘Mg97−xZn1Y2Alx alloys with long-period stacking ordered(LPSO)structures were prepared by conventional casting method.The optical microscopy(OM),X-ray diffraction(XRD)and the scanning electron microscope(SEM)equipped with energy dispersive X-ray spectroscopy(EDS)were used to analyze the microstructure of the alloys with different compositions.Immersion test and electrochemical measurement were used to evaluate the corrosion behavior of the alloys at room temperature,and the corrosive medium is 3.5%NaCl aqueous solution.The results showed that,with the increasing aluminum(Al)addition,exceptα-Mg and LPSO phases,new phases also emerged on the grain boundaries.At the same time,the zigzag part of LPSO phases disappeared,and the boundaries between LPSO phases andα-Mg became smooth.Furthermore,the addition of Al to Mg-Zn-Y alloys could hinder the activity of cathodic hydrogen evolution reaction and improve the uniformity and compactness of the protective surface film,thus,enhanced the corrosion resistance of Mg-Zn-Y alloys. | Dan Wang Jinshan Zhang Jidong Xu Zilong Zhao Weili Cheng Chunxiang Xu | 2014 | Journal of Magnesium and Alloys2014，2，1： | 6 |
| 9 | The novel H1N1 Influenza A global airline transmission and early warning without travel containments显示文摘A novel influenza A (H1N1) has been spreading worldwide. Early studies implied that international air travels might be key cause of a severe potential pandemic without appropriate containments. In this study, early outbreaks in Mexico and some cities of United States were used to estimate the preliminary epidemic parameters by applying adjusted SEIR epidemiological model, indicating transmissibility infectivity of the virus. According to the findings, a new spatial allocation model totally based on the real-time airline data was established to assess the potential spreading of H1N1 from Mexico to the world. Our estimates find the basic reproductive number R0 of H1N1 is around 3.4, and the effective reproductive number fall sharply by effective containment strategies. The finding also implies Spain, Canada, France, Panama, Peru are the most possible country to be involved in severe endemic H1N1 spreading. | CHANG ChaoYi CAO ChunXiang WANG Qiao CHEN Yu CAO ZhiDong ZHANG Hao DONG Lei ZHAO Jian XU Min GAO MengXu ZHONG ShaoBo HE QiSheng WANG JinFeng LI XiaoWen | 2010 | Chinese Science Bulletin2010，55，26： | 6 |
| 10 | Identity-Based Encryption with Keyword Search from Lattice Assumption显示文摘Public key encryption scheme | Xiaojun Zhang Chunxiang Xu Liming Mu Jie Zhao | 2018 | China Communications2018，15，4： | 5 |
| 11 | A fully automatic registration approach based on contour and SIFT for HJ-1 images显示文摘To achieve a fully automatic registration between HJ-1 CCD images and HJ-1 infrared images is a difficult task as it must deal with the varying illuminations and resolutions of the images,different perspectives,and the local deformations within the images.In this paper,aimed at those registration issues,a fully automatic registration approach based on contour and SIFT is proposed.The registration technique performs a pre-registration process using contour feature matching algorithm that decides the overlapping region between a reference image and an input image.Once the coarse regions are obtained,it performs a fine registration process based on SIFT detector and a local adaptive matching strategy.In the fine registration process,image blocking theory is used,which not only speeds up the features extraction and matching,but also makes the matching point pairs distributed uniformly in images,and further improves the accuracy of input image rectification.Experiments with visible images and infrared images from HJ-1A/B demonstrate the efficiency and the accuracy of the proposed technique for multisource remote sensing images registration. | NI XiLiang CAO ChunXiang DING Lin JIANG Tao ZHANG Hao JIA HuiCong LI GuangHe ZHAO Jian CHEN Wei JI Wei XU Min GAO MengXu ZHENG Sheng TIAN Rong LIU Cheng LI Sha | 2012 | Science China Earth Sciences2012，55，10： | 5 |
| 12 | Remote sensing based shrub above-ground biomass and carbon storage mapping in Mu Us desert,China显示文摘The estimation of above-ground biomass(AGB) and carbon storage is very important for arid and semi-arid ecosystems.HJ-1A/B satellite data combined with field measurement data was used for the estimation of shrub AGB and carbon storage in the Mu Us desert,China.The correlations of shrub AGB and spectral reflectance of four bands as well as their combined vegetation indexes were respectively analyzed and stepwise regression analysis was employed to establish AGB prediction equation.The prediction equation based on ratio vegetation index(RVI)was proved to be more suitable for shrub AGB estimation in the Mu Us desert than others.Shrub AGB and carbon storage were mapped using the RVI based prediction model in final.The statistics showed the western Mu Us desert has relatively high AGB and carbon storage,and that the gross shrub carton storage in Mu Us desert reaches 16 799 200 t,which has greatly contributed to the carbon fixation in northern China. | XU Min 1,2,CAO ChunXiang 1,TONG QingXi 1,LI ZengYuan 3,ZHANG Hao 1,HE QiSheng 1,2,GAO MengXu 1,2,ZHAO Jian 1,2,ZHENG Sheng 1,2,CHEN Wei 1,2 & ZHENG LanFen 1 1State Key Laboratory of Remote Sensing Science,Jointly Sponsored by the Institute of Remote Sensing Applications of Chinese Academy of Sciences and Beijing Normal University,Beijing 100101,China 2 Graduate School of the Chinese Academy of Sciences,Beijing 100049,China 3 Research Institute of Forest Resources and Information Techniques,Chinese Academy of Forestry,Beijing 10009,China | 2010 | Science China(Technological Sciences)2010，53，S1： | 5 |
| 13 | Plasmon enhancement for Vernier coupled single-mode lasing from ZnO/Pt hybrid microcavities显示文摘开发单个模式操作并且改进放射激光以便保证 microlasers 和 nanolasers 的实际适用性的表演是必要的。在这份报纸,有 ZnO microcomb 的改变的 nanoscaled 空气差距的二六角形的 microteeth 被用来构造联合耳语画廊洞。这被做完成没有要求任何复杂或复杂的操作完成与 nanoscale 精确放,基于游标效果放射激光的一个稳定的单个模式。光获得和相应紫外放射激光表演通过结合磅 nanoparticles 的局部性的表面电浆子极大地被改进。ZnO/Pt 混合 microcavities 完成了单个模式与更高的方面模式抑制比率和更低的阀值放射激光的紧张的七倍的改进。导致了这改进的机制详细被描述了。 | Yueyue Wang Feifei Qin Junfeng Lu Jitao Li Zhu Zhu Qiuxiang Zhu Ye Zhu Zengliang Shi Chunxiang Xu | 2017 | Nano Research2017，10，10： | 5 |
| 14 | Cloud data auditing with designated verifier显示文摘一个审计的计划是证明采购到云的主人数据被使未经触动的一个好方法,并且能够给公共可证实性服务的一个计划是一些研究人员设法造最后几年了的一种好选择。然而,在一个公共审计计划,所有人做数据和一些分泌信息到公共验证器的漏的可能性的确认是数据主人是 unhappywith 的一个问题这种情形。例如,数据主人不想要任何人对另外知道他把数据在云服务者存储了。由与审计系统的公众联系的隐私的问题激发了,我们建议了审计的一个指明的验证器(DVA ) 基于 Steinfeld 策划 et al.s 通用指明的验证器(DV ) 签名计划。我们的 DVA 计划与私人确认能力授权一个第三方听者。因为计划包含验证器的私人钥匙,它提供私人确认。而且,我们在场审计计划改善审计效率的批。通过严密安全分析,我们证明我们的计划在假设计算 Diffie-Hellman (CDH ) 问题在双线性的地图的组上是难的随机的 oraclemodel 是 provably 安全的。 | Solomon Guadie WORKU Chunxiang XU Jining ZHAO | 2014 | Frontiers of Computer Science2014，8，3： | 4 |
| 15 | Improved Multi-proxy Signature Scheme without Random Oracles显示文摘 | SUN Ying XU Chunxiang WANG Hua FU Chaoxu | 2011 | Chinese Journal of Electronics2011，20，2： | 4 |
| 16 | An Efficient Identity-Based Anonymous Signcryption Scheme显示文摘Signcryption is a cryptographic primitive that performs encryption and signature in a single logical step more efficiently than signthen-encrypt approach. Till now, various kinds of signcryption schemes have been proposed. Among them, the requirement of signcrypter’s privacy protection is needful in some practical applications. In this paper, a new identity-based anonymous signcryption scheme from bilinear pairings, which is the organic combination of identity-based ring signature and encryption scheme, is proposed. The proposed scheme is indistinguishable against the chosen ciphertext attack under the Decisional Bilinear Diffie-Hellman assumption in the random oracle model. Its unforgeability relies on the computational Diffie-Hellman problem. Compared with the previous schemes, the new scheme is more efficient in computation. | YU Yong LI Fagen XU Chunxiang SUN Ying | 2008 | Wuhan University Journal of Natural Sciences2008，13，6： | 4 |
| 17 | The Tibetan Plateau Surface–Atmosphere Coupling System and Its Weather and Climate Effects: The Third Tibetan Plateau Atmospheric Science Experiment显示文摘The Tibetan Plateau(TP) is a key area affecting forecasts of weather and climate in China and occurrences of extreme weather and climate events over the world. The China Meteorological Administration, the National Natural Science Foundation of China, and the Chinese Academy of Sciences jointly initiated the Third Tibetan Plateau Atmospheric Science Experiment(TIPEX-Ⅲ) in 2013, with an 8–10-yr implementation plan. Since its preliminary field measurements conducted in 2013, routine automatic sounding systems have been deployed at Shiquanhe, Gaize, and Shenzha stations in western TP, where no routine sounding observations were available previously. The observational networks for soil temperature and soil moisture in the central and western TP have also been established. Meanwhile, the plateau-scale and regional-scale boundary layer observations, cloud–precipitation microphysical observations with multiple radars and aircraft campaigns, and tropospheric–stratospheric air composition observations at multiple sites, were performed. The results so far show that the turbulent heat exchange coefficient and sensible heat flux are remarkably lower than the earlier estimations at grassland, meadow, and bare soil surfaces of the central and western TP. Climatologically, cumulus clouds over the main body of the TP might develop locally instead of originating from the cumulus clouds that propagate northward from South Asia. The TIPEX-Ⅲ observations up to now also reveal diurnal variations, macro-and microphysical characteristics, and water-phase transition mechanisms, of cumulus clouds at Naqu station. Moreover, TIPEX-Ⅲ related studies have proposed a maintenance mechanism responsible for the Asian 'atmospheric water tower' and demonstrated the effects of the TP heating anomalies on African, Asian, and North American climates. Additionally, numerical modeling studies show that the Γ distribution of raindrop size is more suitable for depicting the TP raindrop characteristics compared to the M–P distribution, the overestimation of sensible heat flux can be reduced via modifying the heat transfer parameterization over the TP, and considering climatic signals in some key areas of the TP can improve the skill for rainfall forecast in the central and eastern parts of China. Furthermore, the TIPEX-Ⅲ has been promoting the technology in processing surface observations, soundings, and radar observations, improving the quality of satellite retrieved soil moisture and atmospheric water vapor content products as well as high-resolution gauge–radar–satellite merged rainfall products, and facilitating the meteorological monitoring, forecasting, and data sharing operations. | Ping ZHAO Yueqing LI Xueliang GUO Xiangde XU Yimin LIU Shihao TANG Wenming XIAO Chunxiang SHI Yaoming MA Xing YU Huizhi LIU La JIA Yun CHEN Yanju LIU Jian LI Dabiao LUO Yunchang CAO Xiangdong ZHENG Junming CHEN An XIAO Fang YUAN Donghui CHEN Yang PANG Zhiqun HU Shengjun ZHANG Lixin DONG Juyang HU Shuai HAN Xiuji ZHOU | 2019 | Journal of Meteorological Research2019，33，3： | 4 |
| 18 | Effects of Ti addition on the microstructure and mechanical properties of Mg-Zn-Zr-Ca alloys显示文摘The effects of Ti additions(0,0.4,0.6,0.8,1.0,1.2 wt.%)on the microstructure and mechanical properties of as-cast and aging Mg-0.4%Zn-1.0%Zr-1.5%Ca(wt.%)alloys were investigated.The results indicated that minor Ti can effectively refine grains,while excessive Ti addition resulted in the grain coarsening.When the content of Ti was 0.8 wt.%,the as-cast alloy exhibited the finest grain size of 39μm which contributed to the optimal mechanical properties with Brinell hardness of 57.9 HB,ultimate tensile strength of 145 MPa and elongation of 3.2%.After T6 heat treatment,the continuous net-like Mg_(2)Ca and Mg_(6)Zn_(3)Ca_(2)phases changed to uniform massive T phases(ternary Mg-Zn-Ca phases)and dispersive halo-like precipitates(Mg_(2)Ca and Mg_(6)Zn_(3)Ca_(2)phases).The ultimate tensile strengths of the alloy at room temperature(RT),175℃and 200℃were correspondingly improved to 182 MPa,169 MPa and 141 MPa,respectively. | Jingai Chen Yan Sun Jinshan Zhang Weili Cheng Xiaofeng Niu Chunxiang Xu | 2015 | Journal of Magnesium and Alloys2015，3，2： | 4 |
| 19 | Plasmon-enhanced ZnO whispering-gallery mode lasing显示文摘 | Chunxiang Xu Feifei Qin Qiuxiang Zhu Junfeng Lu Yueyue Wang Jitao Li Yi Lin Qiannan Cui Zengliang Shi Arumugam Gowri Manohari | 2018 | Nano Research2018，11，6： | 4 |
| 20 | Secure searchable public key encryption against insider keyword guessing attacks from indistinguishability obfuscation显示文摘Public key encryption with keyword search(PEKS)enables one to search encrypted data containing some keyword without decrypting the data in public key setting.Boneh et al.[1]introduced the notion of PEKS,but later Byun et al.[2]showed the scheme in[1]is vulnerable to the outsider/insider keyword guessing attacks(KGA).Many previous PEKS studies have tackled | Lixue SUN Chunxiang XU Mingwu ZHANG Kefei CHEN Hongwei LI | 2018 | Science China(Information Sciences)2018，61，3： | 4 |
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