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Quantum secret sharing between m-party and n-party with six states

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Science china(Physics,Mechanics & Astronomy) 2009年第8期52卷 1191-1202页

作者： GAO Ting1,YAn Fengli2.3 & li YouCheng2.3 1 College of {2. and Information Science,hebei normal university,shijiazhuang 050016,china 2.College of Physics and Information Engineering,hebei normal university,shijiazhuang 050016,china 3 hebei Advanced Thin Films Laboratory,shijiazhuang 050016,china College of mathematics and Information Science Hebei Normal University Shijiazhuang China College of Physics and Information Engineering Hebei Normal University Shijiazhuang China hebei Advanced Thin Films Laboratory Shijiazhuang China

A quantum secret sharing scheme between an m-party group and an n-party group is proposed using three conjugate bases.A sequence of single photons,each of which is prepared in one of the six states,is used directly to encode classical information in the quantum secret sharing *** this scheme,each of all m members in group 1 chooses randomly his/her own secret key individually and independently,and directly encodes his/her respective secret information on the states of single photons via unitary operations,then the last one sends 1/n of the resulting qubits to each member of group *** measuring their respective qubits,all members in group 2.share the secret information shared by all members in group *** renders impossible a Trojan horse attack with a multi-photon signal,a fake-signal attack with EPR pairs,an attack with single photons,and an attack with invisible *** give the upper bounds on the average success probabilities for dishonest agent eavesdropping encryption using the fake-signal attack with any two-particle entangled states.

关键词： quantum secret sharing security EPR pairs

Hydrophobic long-chain two-dimensional perovskite scintillators for underwater X-ray imaging

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Rare Metals 2024年第1期43卷 175-185页

作者： Jin-Xiao Zheng zi-An Zhou Tiao Feng Hui li Cheng-Hua Sun nüWang Yang {2. Yong Zhao Shu-Yun Zhou Key Laboratory of Photochemical Conversion and Optoelectronic Materials Technical Institute of Physics and ChemistryChinese Academy of SciencesBeijing 100190China university of Chinese Academy of Sciences Beijing 100049China Laboratory of Bioinspired Smart Interfacial Science and Technology of the Ministry of Education Beijing Key Laboratory of Bioinspired Energy Materials and DevicesSchool of ChemistryBeijing Advanced Innovation Center for Biomedical EngineeringBeihang UniversityBeijing 100191China Department of Engineering Physics Tsinghua University and Key Laboratory of Particle and Radiation Imaging Ministry of EducationTsinghua UniversityBeijing 100084China e-mail:yangt@***

The underwater X-ray imaging technology development is significant to subaqueous target reconnaissance/detection/identification, subfluvial archaeology,submerged resource exploration, etc. As the core of X-ray imaging detection, the scintillator has been plagued by inherent moisture absorption and decomposition, and strict requirements for seamless packaging and ***, we designed a manganese-doped two-dimensional(2.) perovskite scintillator modified by hydrophobic longchain organic amine through the combination of component and doping engineering. The modified perovskites show high water repellency that can be used as an underwater X-ray scintillator. X-ray images of aquatic organisms or other objects with a high spatial resolution of10 lp·mm^(-1) at a big view field(32.mm × 32.mm) were obtained by scintillation screen. This hydrophobic perovskite scintillator based on molecular design is of great promise in underwater X-ray nondestructive testing technology development.

关键词： Two-dimensional perovskite Hydrophobic Scintillators Underwater X-ray imaging Underwater nondestructive testing technology

Dynamic simulation insights into friction weakening effect on rapid long-runout landslides:A case study of the Yigong landslide in the Tibetan Plateau,{2.

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china Geology 2024年第2期7卷 222-236页

作者： zi-zheng Guo Xin-yong Zhou Da Huang shi-jie Zhai Bi-xia {2. Guang-ming li School of Civil and Transportation Engineering Hebei University of TechnologyTianjin 300401China School of Geological Engineering and Geomatics Chang’an UniversityXi’an 710054China tianjin Municipal Engineering Design&Research institute(TMEDI) Tianjin 300392China

This study proposed a novel friction law dependent on velocity,displacement and normal stress for kinematic analysis of runout process of rapid *** well-known Yigong landslide occurring in the Tibetan Plateau of {2. was employed as the case,and the derived dynamic friction formula was included into the numerical simulation based on Particle Flow *** showed that the friction decreased quickly from 0.64(the peak)to 0.1(the stead value)during the 5s-period after the sliding initiation,which explained the behavior of rapid movement of the *** monitored balls set at different sections of the mass showed similar variation characteritics regarding the velocity,namely evident increase at the initial phase of the movement,followed by a fluctuation phase and then a stopping *** peak velocity was more than 100 m/s and most particles had low velocities at 300s after the landslide *** spreading distance of the landslide was calculated at the two-dimension(profile)and three-dimension scale,*** with the simulation result without considering friction weakening effect,our results indicated a max distance of about 10 km from the initial unstable position,which fit better with the actual situation.

关键词： Rapid long-runout landslide PFC Friction weakening Three-dimension numerical simulation Tibetan Plateau Hydrogeology Engineering Geological hazards survey engineering

Mesozoic radiolarian chert from the middle sector of the Yarlung Zangbo suture zone,Tibet and its tectonic implications

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Science china Earth Sciences 2006年第4期49卷 348-357页

作者： ZHU Jie1,2. DU Yuansheng1, liU Zaoxue2. FEnG Qinglai1, tian Wangxue2. li Jinping2.& WAnG Changping2.1. Faculty of Earth Sciences,china university of Geology, Wuhan 430074, china 2. Hubei institute of Regional Geology Survey, Wuhan 430034, china Faculty of Earth Sciences China University of Geology Wuhan China Hubei institute of Regional Geology Survey Wuhan China

Three radiolarian fauna, aged as the Middle-Late Triassic, Late Jurassic-Early Creta- ceous and Cretaceous radiolarian fauna, have been recognised in the radiolarian cherts from the middle sector of the Yarlung Zangbo suture zone, southern Tibet, china. The average contents of SiO2.in the radiolarian cherts of the Middle-Late Triassic and Late Jurassic-Early Cretaceous are 90.2.% and 92.58% respectively, with average ratios of Al/(Al+Fe+Mn) as 0.75 and 0.74 respectively, the average ratios of MnO/TiO2.as 0.36 and 1.2., the average ratios of Ce/Ce* as 1.15 and 1.03, and the average ratios of Lan/Cen as 0.85 and 0.93. These geochemical features indicate that both of them are biogenic, deposited in a continental margin basin. The SiO2.content of the Early Cretaceous radiolarian chert is 94.12., with the ratio of Al/(Al+Fe+Mn) as 0.59, ratio of MnO/TiO2.as 4.30, ratio of Ce/Ce* as 0.60, ratio of Lan/Cen as 1.59, which imply that the chert is biogenic and was deposited in a pelagic basin. The Middle-Late Triassic association of the radiolarian chert and turbidites as well as their geochemical characteristics indicates the existence of a strong rifting marginal basin in the belt of the Yarlung Zangbo River then. The association of radiolarian chert and bedded basalt indicate an initial Tethyan ocean basin in southern Tibet during the Late Jurassic-Early Cretaceous. The early Cretaceous radiolarian chert coexisting with pillow basalt in top of the ophiolite suite represents sediments from the oceanic Tethyan basin.

关键词： radiolarian chert, sedimentary geochemistry, Mesozoic, Yarlung Zangbo suture zone, Tibet.

Theoretical study on thermal decomposition of azoisobutyronitrile in ground state

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Science china Chemistry 2004年第5期47卷 373-380页

作者： SUn Chengke1,2. ZHAO hongmei1 & li Zonghe1 1. Department of Chemistry, Beijing {2. university, Beijing 100875, china 2. Department of Chemistry, Qujing {2. College, Qujing 655000, china Dept. of Chem. Beijing Normal Univ. Beijing 100875 China Dept. of Chem. Qujing Normal Coll. Qujing 655000 China

The thermal decomposition mechanisms of azoisobutyronitrile (AIBn) in the ground state have been investigated systematically. Based on the potential energy surfaces (PES) of various possible dissociation paths obtained using the semiempirical AM1 method with partial optimization, the density function theory B3LYP/6-311G* method was employed to optimize the geometric parameters of the reactants, the intermediates, the products and the transition states, which were further confirmed by the vibrational analysis. The obtained results show that the re- action process of the two-bond (three-body) simultaneous cleavage Me2.Cn)C─ n=n─ C(Cn)Me2. 2.e2.Cn)C?+n2.is much more favorable than the reaction process of the two one- bond asynchronous cleavage Me2.Cn)Cn=n─C(Cn)Me2.? Me2.Cn)Cn=n?+ Me2.Cn)C?? Me2.Cn)C?+ n2. It was suggested that the electron shrinking effect of double bond (─n=n─) in AIBn and the stabilities of the Me2.Cn)C?radical as well as n2.molecule are main factors of leading to the reaction proceeding in the former pathway. The calculation results were consistent with all the experimental facts.

关键词： azoisobutyronitrile, radicals, thermal decomposition, density function theory (DFT).

Fluvastatin inhibits activation of JAK and STAT proteins in diabetic rat glomeruli and mesangial cells under high glucose conditions

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Acta Pharmacologica Sinica 2007年第12期28卷 1938-1946页

作者： Yong-hong shi~2.Song ZHAO~2.Chen WAnG~2.Ying {2.~3,Hui-jun DUAn~(2.4)~2.Department of Pathology,hebei Medical university,shijiazhuang 050017 ~3 institute of nephrology,Third Hospital,hebei Medical university,shijiazhuang 050051,{12. Department of Pathology Hebei Medical University Shijiazhuang China institute of nephrology Third Hospital Hebei Medical University Shijiazhuang China

Aim:The aim of the present study was to further elucidate the mechanism of theprotective role of fluvastatin on diabetic ***:Streptozotocin-induced diabetic rats were treated daily with fluvastatin (4 mg/kg body weight) *** animals were killed 4 weeks later and urine and blood samples *** kidney tissues were removed and subjected to the *** glomerular mesangial cells (GMC) were cultured under normalglucose (5.5 mmol/L),high glucose (HG,30 mmol/L),HG+AG490 (10 μmol/L),orHG with fluvastatin (1 μmol/L).Glomeruli or the GMC lysate was immunoprecipi-tared and/or immunoblotted with antibodies against Janus kinase 2.(JAK2.,SH2.domain containing tyrosine phosphatase-1 (SHP-1),phosphospecific SHP-2.andsignal transducer and activators of transcription (STAT),***-forming growth factor-β(TGF-β1) mRnA was measured by *** proteinsynthesis of TGF-β1 and fibronectin in the culture medium of GMC was detectedby ***:The phosphorylation levels of JAK2.STAT1,STAT3,andSHP-2.increased significantly,and SHP-1 phosphorylation was reduced in glom-eruli of diabetic *** with fluvastatin reduced phosphorylation levelsof JAK2.STAT1,STAT3,and SHP-2.in glomeruli of diabetic rats,but it had noeffect on the dephosphorylation of *** exposure of GMC to 30 mmol/Lglucose caused the activation of JAK2.STAT1,STAT3,and *** upregulatedTGF-β1 expression and increased protein synthesis of *** highglucose-induced changes were suppressed by fluvastatin,as well as AG490,aJAK2.***:The regulation of the phosphorylation of JAK/STATby fluvastatin may be responsible for its renal protective effects on diabeticnephropathy.

关键词： fluvastatin diabetic nephropathy Janus kinase signal transducer and activators of transcription

On the Cayley-Bacharach property and the construction of vector bundles

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Science china mathematics 2011年第9期54卷 1891-1898页

作者： SUn Hao 1,2.1 Department of mathematics and Statistics,Huazhong {2. university,Wuhan 430079,china 2.Department of mathematics,East china {2. university,Shanghai 2.02.1,china Department of mathematics and Statistics Huazhong Normal University Wuhan China Department of mathematics East China Normal University Shanghai China

We study the Cayley-Bacharach property on complex projective smooth varieties of dimension n≥2.for zero dimensional subscheme defined by the zero set of the wedge of r-n + 1 global sections of a rank r≥n vector bund... 详细信息

关键词： Cayley-Bacharach property vector bundle reflexive sheaf k-very ample

Effect of climatic change on snowmelt runoffs in mountainous regions of inland rivers in northwestern china

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Science china Earth Sciences 2006年第8期49卷 881-888页

作者： WAnG Jian1 & li Shuo2.1. Cold and Arid Regions Environmental and Engineering Research institute, Chinese Academy of Sciences, Lanzhou 730000, {2. 2. College of Geography, nanjing normal university, nanjing 2.0097, {2. Cold and Arid Regions Environmental and Engineering Research institute Chinese Academy of Sciences Lanzhou China College of Geography Nanjing Normal University Nanjing China

Climatic change has significant impacts on snow cover in mid-latitude mountainous re- gions, in the meantime, spatial and temporal changes of snow cover and snowmelt runoffs are con- sidered as sensitive indicators for climatic change. In this study, the upper Heihe Watershed in the Qilian Mountains was selected as a typical area affected by snow cover and snowmelt runoffs in northwestern china. The changes in air temperatures, precipitation, snowfall and spring snowmelt runoffs were analyzed for the period from 1956 to 2.01. The results indicate that climatic warming was apparent, particularly in January and February, but precipitation just fluctuated without a clear trend. The possible changes of snowmelt runoffs in the upper Heihe watershed in response to a warming of 4℃ were simulated using Snowmelt Runoff Model (SRM) based on the degree-day factor algorithm. The results of the simulation indicate that a forward shifting of snow melting season, an increase in water flows in earlier melting season, and a decline in flows in later melting season would occur under a 4℃ warming scenario.

关键词： climatic changes, snowmelt runoff, SRM model, upper Heihe Watershed, simulating.

Research progress in the inner surface modification of metal tubes by plasma processing

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Progress in natural Science:Materials International 2006年第11期16卷 1119-1126页

作者： ZHAnG Guling~ 1,2.**, WU Xingfang~1, GU Weichao~2. CHEn Guangliang~2. FEnG Wenran~2. nIU Erwu~2. li li~2. L Guohua~2. CHEn Huan~2. FAn Songhua~2. liU Chizi~2.and YAnG Size~2.1. School of Material Science and Engineering, university of Science and Technology Beijing, Beijing 100083, china 2. Beijing national Laboratory for Condensed Matter Physics, institute of Physics, Chinese Academy of Sciences, Beijing 100080, china) School of Material Science and Engineering University of Science and Technology Beijing Beijing 100083 China Beijing national Laboratory for Condensed Matter Physics Institute of Physics Chinese Academy of Sciences Beijing 100080 China

The recent progress in inner surface hardening of tubes by plasma processing is summerized. Several techniques of inner surface plasma source ion implantation and deposition are introduced, and their advantages and disadvantages are discussed. The basic principles, technical features and new progress of inner surface plasma source ion implantation methods for metal tubes, which were developed in our laboratory, are described in detail. And perspectives of the future technical development for inner surface ion implantation of tubes are presented.

关键词： PSII metal tubes inner surface surface modification.