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Revocable and certificateless public auditing for cloud storage

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Science China(Information Sciences) 2020年第10期63卷 282-284页

作者： yinghui zhang Tiantian zhang Shengmin XU Guowen XU Dong ZHENG School of Cyberspace Security Xi'an University of Posts and Telecommunications Guangxi Cooperative Innovation Center of Cloud Computing and Big Data Guilin University of Electronic Technology National Engineering Laboratory for Wireless Security Xi'an University of Posts and Telecommunications Secure Mobile Centre School of Information SystemsSingapore Management University School of Computer Science and Engineering University of Electronic Science and Technology of China

Dear editor,Plenty of computing and storage resources in the cloud are provided for users with restricted computing and storage resources,which has attracted the attention of many researchers[1,2].A generic blockchain-based cloud data auditing scheme[3] is proposed,which is compatible with any blockchains including the bitcoin *** the data integrity checking scheme,certificate-

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Effect of cerium on ignition point of AZ91D magnesium alloy

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China Foundry 2008年第1期5卷 32-35页

作者： Zhao Hongjin zhang yinghui Kang Yonglin School of Materials and Chemical Engineering Jiangxi University of Science and Technology Ganzhou 341000 Jiangxi China School of Materials Science and Engineering University of Science and Technology Beijing Beijing 100083 China

The surface and interior temperature-time curves of blocky cerium modified AZ91D magnesium alloy were measured during a non-protective heating and melting process. Two inflection points with rapid increase in temperature were found on both curves, which corresponded to the formation of ＂aulifiower＂ oxide on the surface and the occurrence of flame during melting. These two temperatures are therefore defined as oxidation point and ignition point, respectively. The interior temperature-time curve is similar to that measured on the surface except for a comparable time delay. The oxidation and ignition temperatures increase with Ce content, an average increase of 33℃ and 61℃ was found when Ce addition was about 1.0 wt %. However, the increasing rate of the oxidation and ignition temperature decreases with increasing Ce content. An addition of 0.6wt% Ce is recommended for ignition-resistant AZ91 magnesium alloy.

关键词： AZ91D magnesium alloy cerium ignition resistance ignition point measurement

Long-Term Variation of Global GEOV2 and MODIS Leaf Area Index (LAI) and Their Uncertainties: An Insight into the Product Stabilities

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Journal of Remote Sensing 2021年第1期2021卷 302-318页

作者： Hongliang Fang Yao Wang yinghui zhang Sijia Li LREIS Institute of Geographic Sciences and Natural Resources ResearchChinese Academy of SciencesBeijing 100101China College of Resources and Environment University of Chinese Academy of SciencesBeijing 100049China

Leaf area index(LAI)is an essential climate variable that is crucial to understand the global vegetation ***-term satellite LAI products have been applied in many global vegetation change ***,these LAI products contain various uncertainties that are not been fully considered in current *** objective of this study is to explore the uncertainties in the global LAI products and the uncertainty *** global LAI datasets—the European Geoland2 Version 2(GEOV2)and Moderate Resolution Imaging Spectroradiometer(MODIS)(2003-2019)—were *** qualitative quality flags(QQFs)and quantitative quality indicators(QQIs)embedded in the product quality layers were analyzed to identify the temporal anomalies in the quality *** results show that the global GEOV2(0.042/10a)and MODIS(0.034/10a)LAI values have steadly increased from 2003 to *** global LAI uncertainty(0.016/10a)and relative uncertainty(0.3%/10a)from GEOV2 have also increased gradually,especially during the growing season from April to *** uncertainty increase is larger for woody biomes than for herbaceous ***,the MODIS LAI product uncertainty remained stable over the study *** uncertainty increase indicated by GEOV2 is partly attributed to the sensor shift in the product *** algorithm enhancement is necessary to improve the cross-sensor *** study highlights the importance of studying the LAI uncertainty and the uncertainty *** variations in the LAI products and the product quality revealed herein have significant implications on global vegetation change studies.

关键词： uncertainty qualitative season

Isotope effect of the stereodynamics in the reactions F+HCl→HF+Cl and F+DCl→DF+Cl

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Chinese Science Bulletin 2010年第34期55卷 3868-3874页

作者： YIN ShuHui GUO MingXing LI Lei LI XiangPing zhang yinghui Department of Physics Dalian Maritime University Dalian 116026 China Environmental Science and Engineering College Dalian Maritime University Dalian 116026 China

Using a new ground-state ab initio potential energy surface reported by Deskevich et al.,the product polarizations in the reactions F+HCl→HF+Cl and F+DCl→DF+Cl were studied by employing the quasi-classical trajectory *** a collision energy of 10 kcal/mol,the four generalized polarization-dependent differential cross-sections(2π/σ)(dσ00/dωt),(2π/σ)(dσ20/dωt),(2π/σ)(dσ22+/dωt)and(2π/σ)(dσ21-/dωt)were calculated in the center-of-mass *** distribution of the angle between k and j',P(θr),the distribution of the dihedral angle denoting the k-k'-j' correlation,P(φr),and the angular distribution of the product rotational vectors in the form of polar plots P(θr,φr)were also *** evident influence of isotope substitution on the product polarization is *** effect may result from the different mass factors of the two reactions.

关键词：同位素效应 DCL 反应盐酸高频氯准经典轨迹法替代产品

Crystal Structure and Photoluminescence Properties of Two Barium（II） MOFs

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Chemical Research in Chinese Universities 2018年第5期34卷 700-704页

作者： LI Kai HE Kunhuan LI Quanwen XIA Bin WANG Qinglun zhang yinghui Tianjin Key Laboratory of Metal and ~lolecule-based Material Chemistry School of Materials Science and Engineering Nankai University Tianjin 300350 P. R. China Collaborative Innovation Center of Chemical Science and Engineering(Tianjin) College of Chemistry Nankai University Tianjin 300071 P. R. China

In this article, two Ba（II） metal-organic frameworks（MOFs）, {[Ba（BPS）（H2O）2]＇H2O}n（1） and [Ba（BPS）（H2O）R]n（2）（H2BPS=4,4＇-bibenzoic acid-2,2＇-sulfone）, were synthesized and characterized. X-Ray crystal structural analyses reveal that compounds 1 and 2 have different structures, which is probably related to different coordination modes of ligand in compounds 1 and 2. It is remarkable that compounds 1 and 2 both show excellent thermal stability. The solid-state emission spectra reveal that compounds 1 and 2 both present strong luminescence emission bands at room temperature.

关键词： Metal-organic framework Coordination mode Thermal stability Solid-state emission spectrum Barium(II)

A zinc(Ⅱ) MOF based on secondary building units of infinite wavy-shaped chain exhibiting obvious luminescent sense effects

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Chinese Chemical Letters 2019年第2期30卷 499-501页

作者： Kai Li Kunhuan He Quanwen Li Bin Xia Qinglun Wang yinghui zhang School of Materials Science and Engineering TKL of Metal and Molecule-Based Material Chemistry Nankai University College of Chemistry Collaborative Innovation Center of Chemical Science and Engineering (Tianjin) Nankai University

A new metal-organic framework (MOF),{[Zn_7 (BPS)_4 (OH)_6 (H_2O)_2]·5 H_2O]_n}(1), (H_2 BPS=4,4′-bibenzoic acid-2,2′-sulfone), based on a wavy and infinite chain-shaped secondary building units, has been synthesized under solvothermal conditions and characterized by single crystal X-ray diffraction and further confirmed by PXRD, TGA and IR spectrum. The solid-state emission spectra reveal that compound 1 presents strong luminescence emission bands at room temperature. The fluorescent properties of compound 1 in diverse organic solvents indicated that 1 has palpable luminescent sense effects for DMF and DMAC.

关键词： Metal-organic frameworks Secondary building unit Solid-state emission spectra Fluorescent properties Luminescent sense effects

Comparison of detection results of hypoxic-ischemic encephalopathy at different degrees in infant patients between brain electrical activity mapping, transcranial Doppler sonography and computer tomography examinations

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Neural Regeneration Research 2006年第4期1卷 379-381页

作者： Dongruo He Xiaoying Xu yinghui zhang Guochao Han Department of Neuro-electrophysiology Second Affiliated Hospital of Qiqihar Medical College Qiqihar 161006 Heilongjiang Province. China Department of Pediatrics Second Affiliated Hospital of Qiqihar Medical College Qiqihar 161006 Heilongjiang Province. China

BACKGROUND： It has been proved that brain electrical activity mapping （BEAM） and transcranial Doppler （TCD） detection can reflect the function of brain cell and its diseased degree of infant patients with moderate to severe hypoxic-ischemic encephalopathy （HIE）. OBJECTIVE： To observe the abnormal results of HIE at different degrees detected with BEAM and TCD in infant patients, and compare the detection results at the same time point between BEAM, TCD and computer tomography （CT） examinations. DESIGN ： Contrast observation SETTING： Departments of Neuro-electrophysiology and Pediatrics, Second Affiliated Hospital of Qiqihar Medical College. PARTICIPANTS： Totally 416 infant patients with HIE who received treatment in the Department of Newborn Infants, Second Affiliated Hospital of Qiqihar Medical College during January 2001 and December 2005. The infant patients, 278 male and 138 female, were at embryonic 37 to 42 weeks and weighing 2.0 to 4.1 kg, and they were diagnosed with CT and met the diagnostic criteria of HIE of newborn infants compiled by Department of Neonatology, Pediatric Academy, Chinese Medical Association. According to diagnostic criteria, 130 patients were mild abnormal, 196 moderate abnormal and 90 severe abnormal. The relatives of all the infant patients were informed of the experiment. METHOOS： BEAM and TCD examinations were performed in the involved 416 infant patients with HIE at different degrees with DYD2000 16-channel BEAM instrument and EME-2000 ultrasonograph before preliminary diagnosis treatment （within 1 month after birth） and 1,3,6,12 and 24 months after birth, and detected results were compared between BEAM, TCD and CT examinations. MAIN OUTCOME MEASURES： Comparison of detection results of HIE at different time points in infant patients between BEAM. TCD and CT examinations. RESULTS： All the 416 infant patients with HIE participated in the result analysis. （1） Comparison of the detected results in infant patients with mild

关键词： HIE Comparison of detection results of hypoxic-ischemic encephalopathy at different degrees in infant patients between brain electrical activity mapping transcranial Doppler sonography and computer tomography examinations

Multi-wavelength Brillouin erbium-doped fiber laser with 40 GHz frequency shift interval assisted by Sagnac loop filter

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Optoelectronics Letters 2024年第5期20卷 265-271页

作者： QI Hexin ZHOU Xuefang zhang yinghui YANG Guowei BI Meihua HU Miao School of Communication Engineering Hangzhou Dianzi UniversityHangzhou 310018China

A switchable and tunable multi-wavelength Brillouin erbium-doped fiber laser(MWBEFL) is designed and experimentally demonstrated. A Sagnac loop filter is employed as the switcher to obtain the double Brillouin frequency shift(BFS) of 0.172 nm(~20 GHz) and the quadruple BFS of 0.35 nm(~40 GHz). The working principles of the proposed laser are theoretically analyzed. The experimental results show that up to 8 Stokes lines with a wavelength interval of 0.172 nm can be obtained. When the Sagnac loop filter is used, two different output spectra with wavelength interval of 0.35 nm are obtained by adjusting the polarization controller(PC) and the optical signal-to-noise ratio(OSNR) is greater than 33 dB. By adjusting the Brillouin pump(BP) wavelength to investigate the tunability of the fiber laser, the output of 2—5 laser channels can be realized corresponding to 20 nm wavelength range. This approach is simple and can be employed for the microwave generation of other frequency ranges subject to the filtering shift of the Sagnac loop.

关键词： fiber laser filter

THE OPTIMAL LARGE TIME BEHAVIOR OF3D QUASILINEAR HYPERBOLIC EQUATIONS WITH NONLINEAR DAMPING

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Acta Mathematica Scientia 2024年第3期44卷 1064-1095页

作者：王涵张映辉 School of Mathematics and Statistics Guangxi Normal UniversityGuilin541004China

We are concerned with the large-time behavior of 3D quasilinear hyperbolic equations with nonlinear *** main novelty of this paper is ***,we prove the optimal decay rates of the second and third order spatial derivatives of the solution,which are the same as those of the heat equation,and in particular,are faster than ones of previous related ***,for well-chosen initial data,we also show that the lower optimal L^(2) convergence rate of the k(∈[0,3])-order spatial derivatives of the solution is(1+t)^(-(2+2k)/4).Therefore,our decay rates are optimal in this *** proofs are based on the Fourier splitting method,low-frequency and high-frequency decomposition,and delicate energy estimates.

关键词： quasilinear hyperbolic equations large time behavior optimal decay rates