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Practical Constant-Size Ring Signature

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Journal of Computer Science & Technology 2018年第3期33卷 533-541页

作者： Meng-Jun Qin Yun-Lei Zhao zhou-Jun ma Shanghai Key Laboratory of Data Science School of Computer Science Fudan University Shanghai 201203 China State Key Laboratory of Integrated Services Networks Xidian University Xi'an 710126 China State Key Laboratory of Cryptology State Cryptology Administration Beijing 100878 China

Bitcoin has gained its popularity for almost 10 years as a ＂secure and anonymous digital currency＂. However, according to several recent researches, we know that it can only provide pseudonymity rather than real anonymity, and privacy has been one of the main concerns in the system similar to Bitcoin. Ring signature is a good method for those users who need better anonymity in cryptocurrency. It was first proposed by Rivest et al. based upon the discrete logarithm problem （DLP） assumption in 2006, which allows a user to sign a message anonymously on behalf of a group of users even without their coordination. The size of ring signature is one of the dominating parameters, and constant-size ring signature （where signature size is independent of the ring size） is much desirable. Otherwise, when the ring size is large, the resultant ring signature becomes unbearable for power limited devices or leads to heavy burden over the communication network. Though being extensively studied, currently there are only two approaches for constant-size ring signature. Achieving practical constant-size ring signature is a long-standing open problem since its introduction. In this work, we solve this open question. We present a new constant-size ring signature scheme based on bilinear pairing and accumulator, which is provably secure under the random oracle （RO） model. To the best of our knowledge, it stands for the most practical ring signature up to now.

关键词： ring signature constant size bilinear pairing accumulator

Enhanced ethanol oxidation over Pd nanoparticles supported porous graphene-doped MXene using polystyrene particles as sacrificial templates

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Rare Metals 2022年第9期41卷 3170-3179页

作者： Yi-Zhe Chen Ming zhou Yu-Fu Huang Yan-Yun ma Luo-Yi Yan Xin-Wen zhou Xin-zhou ma Xue-Ling Zhao Cheng Chen Juan Bai Dong-Hai Lin Shanghai Engineering Research Center of Advanced Thermal Functional materials Shanghai Key Laboratory of Engineering Materials Application and EvaluationSchool of Energy and MaterialsShanghai Polytechnic UniversityShanghai201209China Institute of Functional Nano&Soft materials(FUNSOM) Jiangsu Key Laboratory for Carbon-Based Functional Materials&DevicesSoochow UniversitySuzhou215123China College of Biological and Pharmaceutical Sciences China Three Gorges UniversityYichang443002China School of materials Science and Hydrogen Energy Foshan UniversityFoshan528000China School of Chemistry and Physics Queensland University of TechnologyBrisbaneQLD4000Australia

Fabrication of superior catalytic performance palladium-based catalysts with affordable cost is the key to develop direct ethanol fuel ***,Pd-decorated three-dimensional(3D)porous constructed from graphene oxide(GO)and MXene combining with polystyrene(PS)particles as sacrificial templates(Pd/GO-MXene-PS)to elevate the catalytic performance for ethanol oxidation was *** 3D porous interconnected structure of Pd/GO-MXene-PS was characterized by scanning electron microscope(SEM),transmission electron microscope(TEM)and Brunner−Emmet−Teller(BET).By optimizing the doping ratio of MXene to GO,the mass activity of Pd/GO_(5)-MXene_(5)-PS(2944.0 ma·mg^(−1))was 3.0 times higher than that of commercial Pd/C(950.4 ma·mg^(−1))toward ethanol oxidation in base ***,the rotating disk electrode(RDE)results demonstrated that Pd/GO5-MXene5-PS had a faster kinetics of ethanol *** enhanced ethanol oxidation over Pd/GO5-MXene5-PS could attribute to the excellent 3D interconnected porous structure,large surface area,good conductivity and homogeneous Pd *** work provided a new idea for creating 3D porous MXene composite materials in electrocatalysis.

关键词： Pd nanoparticles Ethanol oxidation Graphene MXene Polystyrene(PS)template Rotating disk electrode(RDE)

Strike up the Strongest Tune of “Chinese Commodity”

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大经贸 1997年第11期 82-85页

作者： ma zhou

62,309 businessmen attended this fair,contracted exportvalue amounted to 10.53 billion USD,increasing by3.2%9 and 7.29% respectively over that of last *** autumn of this year has been an epecially prosper-ous and important *** September 12,the 15th NationalCongress of CPC,which determines the destiny of China inthe next centrry,was inaugurated in *** long afterthat,on October 15,another very imporant activity in thenational economic life,’97 China Export Commodity Fairwas held in Guangzhou as *** the first half year,our foreign trade has laid downfoundation for the eighty-second fair with outstanding re-sults:according to the statistics from the *** ag-oregate national import and export volume from Ianuary

关键词：广东胶印

“Necktie King” Zeng Xianzi

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大经贸 1997年第11期 87-89页

作者： ma zhou

Zeng Xianzi,called "necktie king" by people,ischairman of the board of Hong Kong GoldlionGroup Ltd.,chairman of the board of Goldlion RealProperty Development Ltd.,chairman of the board ofGoldlion Tobacco International Ltd.,For the present heis a member of the standing committee of the NationalCongress,vice chairman of China National Industry andCommerce *** of Hong Kong ChinaGeneral Chamber of Commerce,trustee of Hong KongTrade DevelopmentBureau,vice president of the boardof trustees of Guangzhou Jinan University,honorarypresident of Guangdong Jiaying *** Xianzi’s good name has spread far and wide,justlike his Goldlion.(1)Start from scratch and create the golden

关键词： Necktie King Zeng Xianzi

HOW ABOUT NANFANG BUILDING NOW?

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大经贸 1997年第11期 90-91页

作者： ma zhou

NnaFang Building has been a star enterprise in the *** its establishment in 1954 to the beginning of987,it had continuously been the biggest retail storein south *** various economic indicators ranked firstin the same business line in the country in 1983,and havekept standing in the first 10 places ever *** the continuous deepening of reform and being opento the outside and the gradual maturation of market envi-ronment,the business on department stores has been thefocus of investment by domestic and foreign consortia andenterprises while the competition tends to be ***-over,as Guangzhou urban construction has been transferredeastwards,South Building’s geographical position of busi-ness center has been gradually lost.

关键词：大经贸广东

HUIzhou VOWS TO FOREIGN INVESTORS

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大经贸 1997年第10期 92-93页

作者： ma zhou

Sincerity and good faith has always been regarded as themost basic play rule for the market economy. It is byfollowig this rule that Huizhou people, well-known inGuangdong and full of farsightedness, do business and dealwith people. Huizhou Foreign Trade and Economy Commission madepublic eighteen service promises on September 18 so thatthe foreign businessmen who have come from afar and

关键词：大经贸广东

A numerical investigation of interactions between extreme waves and a vertical cylinder

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Journal of Hydrodynamics 2020年第5期32卷 853-864页

作者： Qun-bin Chen Yu-xiang ma Guo-hai Dong Xiao-zhou ma Bing Tai Xu-yang Niu State Key Laboratory of Coastal and Offshore Engineering Dalian University of TechnologyDalian 116024China

In this paper,the interactions between extreme waves and a vertical cylinder are investigated through a 3-D two-phase flow *** numerical model is verified and validated by experimental ***,two factors are considered,the global wave steepness and the frequency bandwidth of the wave groups,in the studies of the in-line wave forces and the wave run-up around a *** is found that both the in-line wave forces and the wave run-up are remarkably increased with the increase of the global wave steepness,whereas the effect of the frequency bandwidth on the in-line wave forces is relatively weak in comparison with its effect on the wave *** minimum and maximum wave run-ups are located in the directions of 22.5°and 180°with respect to the direction of the incident waves,***,a new empirical formula is proposed for predicting the in-line wave forces by using only the free surface elevations around the *** results of the formula agree well with the simulation results.

关键词： Extreme waves vertical cylinder in-line wave force wave run-up

Effect of Compressive Stresses on Microstructure of Scales Formed on Pure Iron During Continuous Air Cooling

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Journal of Iron and Steel Research International 2010年第2期17卷 27-30页

作者： zhou Chang-hai ma Hai-tao WANG Lai School of materials Science and Engineering Dalian University of Technology Dalian 116085 Liaoning China

The microstructure development of oxide scale on pure iron under the mutual action of compressive stress and cooling conditions was investigated. Oxide scale structure was examined by optical microscopy （OM） and scanning electron microscopy （SEM）. It was found that oxide scale formed under normal cooling conditions had a struc ture mainly consisting of an outer magnetite and an inner wustite layer. When a compressive stress was applied, numerous magnetite precipitates formed within wustite layer homogeneously at starting cooling temperature of 900 ℃, and the wustite layer in the scale was transformed into a mixture of mostly magnetite/iron eutectoid and magnetite layer at starting cooling temperature of 700 ℃. The wustite decomposition and precipitation of magnetite in wustite under compressive stress were discussed.

关键词： compressive stress oxide scale wustite magnetite cooling

In situ preparation of Ag@AgCl/Bio-veins composites and their photocatalytic activity and recyclability

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Frontiers of Chemical Science and Engineering 2023年第7期17卷 906-917页

作者： Min Zou Chao Tan Zhengqiu Yuan Ming Wu Jian Jian Lei Zhang Yan Zhang zhou ma Hu zhou School of Resource&Environment and Safety Engineering Hunan University of Science and TechnologyXiangtan 411201China Key Laboratory of Theoretical Organic Chemistry and Functional Molecules Ministry of EducationFunctional Film Materials Engineering Research Center of Hunan ProvinceHunan Provincial Key Laboratory of Advanced Materials for New Energy Storage and ConversionSchool of Chemistry and Chemical EngineeringHunan University of Science and TechnologyXiangtan 411201China School of Information and Electrical Engineering Hunan University of Science and TechnologyXiangtan 411201China

The industrial application of nano-photocatalysts in wastewater treatment has been severely restricted for a long time due to their difficult separation,poor reusability,and low *** this work,a facile strategy was proposed to enhance the photocatalytic activity and recovery performance of Ag@AgCl *** veins(Bio-veins)with a unique 3D porous construction were used as carriers for the in-situ growth of Ag@AgCl *** electron microscopy results showed that the Ag@AgCl nanoparticles were uniformly loaded on the surface and interior of the Bio-veins,and the size of the Ag@AgCl nanoparticles immobilized on the Bio-veins(50–300 nm)was significantly smaller than Ag@AgCl obtained by the co-precipitation method(1–3μm).The Bio-veins played a vital role in the photocatalysis reaction *** degradation efficiency of the Ag@AgCl/Bio-veins(CI4)was up to 3.50 times as high as pure Ag@***,the composites also exhibited excellent recyclability and stability under both visible and solar *** work provided a suitable strategy for nano-photocatalysts for practical application and may also offer new possibilities for the high-value utilization of biomass materials.

关键词： Ag@AgCl biological veins photocatalytic activity recyclability