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Chinese Physics Letters 2000年第9期17卷 683-685页

作者： YIN shi-Long BIAN Qing WEI shi-qiang Department of Mathematics and Physics Hohai UniversityNanjing 210024 Department of Basic Science Institute of Communication EngineeringNanjing 210016 National Synchrotron Radiation Laboratory and Center for Fundamental Physics University of Science and Technology of ChinaHefei 230029

Local structures of the mechanically alloyed Fe_(77-x)Ni_(x)Cu_(1)Nb_(2)P_(14)B_(6)soft magnetic materials have been in vestigated by x-ray absorption fine *** results show that mechanical alloying(MA)can drive theFe_(77-x)Ni_(x)Cu_(1)Nb_(2)P_(14)B_(6)powder mixture to produce amorphous alloy when the atomic concentration of Fe ele ment is about and over 40%.On the contrary,the MA Fe_(77-x)Ni_(x)Cu_(1)Nb_(2)P_(14)B_(6)is a solid solution with an fcc-like structure in the region of lower Fe atomic concentration(<22%),preserving a medium-range order around Ni and Fe ***,we have found that the local structure geometry of Fe atom is similar to that of Ni atom for all the MA Fer7-xNixCu1 Nb2P14B6 *** indicates that the local structures of Fe and Ni atoms in a Fe_(77-x)Ni_(x)Cu_(1)Nb_(2)P_(14)B_(6)sample only depend on the x value of element Ni after ball milling.

关键词： structure alloying alloy

Wavelet Galerkin Methods for Aerosol Dynamic Equations in Atmospheric Environment

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Communications in Computational Physics 2009年第6期6卷 109-130页

作者： Dong Liang qiang Guo Sunling gong Department of Mathematics and Statistics York University4700 Keele StreetTorontoOntarioM3J 1P3Canada Air Quality Research Division S&T BranchEnvironment Canada4905 Dufferin StreetTorontoOntarioM3H 5T4Canada

Aerosol modelling is very important to study and simulate the behavior of aerosol dynamics in atmospheric *** this paper,we consider the general nonlinear aerosol dynamic equations which describe the evolution of the aerosol *** time and discrete time wavelet Galerkin methods are proposed for solving this *** using the Schauder’s fixed point theorem and the variational technique,the global existence and uniqueness of solution of continuous time wavelet numerical methods are established for the nonlinear aerosol dynamics with sufficiently smooth initial *** error estimates are obtained for both continuous and discrete time wavelet Galerkin *** examples are given to show the efficiency of the wavelet technique.

关键词： Aerosol dynamics wavelet Galerkin methods semi-discrete fully-discrete existence error estimate

Cryptanalysis and improvement of a certificateless signcryption scheme without bilinear pairing

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Frontiers of Computer Science 2014年第4期8卷 656-666页

作者： Wenbo shi Neeraj KUMAR Peng gong Zezhong ZHANG Department of Electronic Engineering Northeastern University at Qinhuangdao Qinhuangdao 066004 China Department of Computer Science and Engineering Thapar University Patiala 147004 India National Key Laboratory of Mechatronic Engineering and Control School of Mechatronical Engineering Beijing Institute of Technology Beijing 100081 China The Yellow River Institute of Science North China University of Water Conservancy & Electric Power Zhengzhou 450011 China

As an improtant cryptographic scheme, signcryption scheme has been widely used in applications since it could provide both of signature and encryption. With the development of the certificateless public key cryptography （CLPKC）, many certificatelss signcryption （CLSC） schemes using bilinear pairing hve been proposed. Comparated other operations, the bilinear pairing operaion is much more compulicated. Therefore, CLSC scheme without bilinear pairing is more suitable for applications. Recently, Jing et al. proposed a CLSC scheme without bilinear pairing and claimed their scheme is secure against two types of adversaries. In this paper, we will show their scheme provide neither unforgeability property nor confidentiality property. To improve security, we also propose a new CLSC scheme without pairing and demonstrate it is provably secure in the random oracle model.

关键词： certificateless public key cryptography signcryption scheme bilinear pairings elliptic curve random oracle model

Machine learning of phases and mechanical properties in complex concentrated alloys

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Journal of Materials Science & Technology 2021年第28期87卷 133-142页

作者： Jie Xiong San-qiang shi Tong-Yi Zhang School of Materials Science and Engineering Harbin Institute of TechnologyShenzhenChina Department of Mechanical Engineering The Hong Kong Polytechnic UniversityHong KongChina Shenzhen Research Institute The Hong Kong Polytechnic UniversityShenzhenChina Material Genome Institute Shanghai UniversityShanghaiChina

The mechanical properties of complex concentrated alloys(CCAs)depend on their formed phases and corresponding *** data-driven prediction of the phase formation and associated mechanical properties is essential to discovering novel *** present work collects 557 samples of various chemical compositions,comprising 61 amorphous,167 single-phase crystalline,and 329 multiphases crystalline *** classification models are developed with high accuracies to category and understand the formed phases of ***,two regression models are constructed to predict the hardness and ultimate tensile strength of CCAs,and the correlation coefficient of the random forest regression model is greater than 0.9 for both of two targeted ***,the Shapley additive explanation(SHAP)values are calculated,and accordingly four most important features are identified.A significant finding in the SHAP values is that there exists a critical value in each of the top four features,which provides an easy and fast assessment in the design of improved mechanical properties of *** present work demonstrates the great potential of machine learning in the design of advanced CCAs.

关键词： Materials informatics SHAP Complex concentrated alloys High entropy alloys

Effects of sterilization treatments on the analysis of TOC in water samples

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Journal of Environmental Sciences 2010年第5期22卷 789-795页

作者： Yiming shi Lingfeng Xu Dongqin gong Jun Lu College of Environmental Science and Natural Resources Zhejiang University Hangzhou 310029 China Ministry of Education Key Laboratory of Environmental Remediation and Ecological Health Zhefiang University Hangzhou 310029 China Zhejiang Provincial Key Laboratory of Subtropical Soil and Plant Nutrition Zhefiang University Hangzhou 310029 China

Decomposition experiments conducted with and without microbial processes are commonly used to study the effects of environmental microorganisms on the degradation of organic ***,the effects of biological pretreatment （sterilization） on organic matter often have a negative impact on such *** on the principle of water total organic carbon （TOC） analysis,the effects of physical sterilization treatments on determination of TOC and other water quality parameters were *** results revealed that two conventional physical sterilization treatments,autoclaving and 60 Co γ-radiation sterilization,led to the direct decomposition of some organic pollutants,resulting in remarkable errors in the analysis of TOC in water ***,the extent of the errors varied with the intensity and the duration of sterilization ***,a novel sterilization method for water samples,0.45 μm micro-filtration coupled with ultraviolet radiation （MCUR）,was developed in the present *** results indicated that the MCUR method was capable of exerting a high bactericidal effect on the water sample while significantly decreasing the negative impact on the analysis of TOC and other water quality *** and after sterilization treatments,the relative errors of TOC determination could be controlled to lower than 3% for water samples with different categories and concentrations of organic pollutants by using MCUR.

关键词： sterilization autoclave 60Co γ-radiation micro-filtration ultraviolet radiation

Optimizing the Copy-on-Write Mechanism of Docker by Dynamic Prefetching

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Tsinghua Science and Technology 2021年第3期26卷 266-274页

作者： Yan Jiang Wei Liu Xuanhua shi Weizhong qiang National Engineering Research Center for Big Data Technology and System Services Computing Technology and System LabHuazhong University of Science and TechnologyWuhan 430074China

Docker,as a mainstream container solution,adopts the Copy-on-Write(CoW)mechanism in its storage *** mechanism satisfies the need of different containers to share the same ***,when a single container performs operations such as modification of an image file,a duplicate is created in the upper readwrite layer,which contributes to the runtime *** the accessed image file is fairly large,this additional overhead becomes *** we present the concept of Dynamic Prefetching Strategy Optimization(DPSO),which optimizes the Co W mechanism for a Docker container on the basis of the dynamic prefetching *** the beginning of the container life cycle,DPSO pre-copies up the image files that are most likely to be copied up later to eliminate the overhead caused by performing this operation during application *** experimental results show that DPSO has an average prefetch accuracy of greater than 78%in complex scenarios and could effectively eliminate the overhead caused by the CoW mechanism.

关键词： Docker container Copy-on-Write(CoW) storage driver prefetch strategy

Preparation of SiC Fiber Reinforced Nickel Matrix Composite

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Journal of Materials Science & Technology 2012年第3期28卷 234-240页

作者： Lu Zhang Nanlin shi Jun gong Chao Sunt Institute of Metal Research Chinese Academy of Sciences Shenyang 110016 China

A method of preparing continuous（Al＋Al2O3）-coated SiC fiber reinforced nickel matrix composite was presented,in which the diffusion between SiC fiber and nickel matrix could be *** sputtering is used to deposit Ni coating on the surface of the（Al＋Al2O3）-coated SiC fiber in preparation of the precursor *** is shown that the deposited Ni coating combines well with the（Al＋Al2O3） coating and has little negative effect on the tensile strength of（Al＋Al2O3）-coated SiC ***-state diffusion bonding process is employed to prepare the（Al＋Al2O3）-coated SiC fiber reinforced nickel matrix with 37% fibers in *** solid-state diffusion bonding process is optimized and the optimum parameters are temperature of 870,pressure of 50 MPa and holding time of 2 *** this condition,the precursor wires can diffuse well,composite of full density can be formed and the（Al＋Al2O3） coating is effective to restrict the reaction between SiC fiber and nickel matrix.

关键词： SiC fiber Composite Diffusion barrier layer Precursor wire

Some New Exact Solutions of mKdV Equations

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Communications in Theoretical Physics 2006年第5期45卷 790-792页

作者： gong Lun-Xun ZHENG qiang YUE Ping School of Science Guizhou Normal University Guiyang 550001 China

New exact solutions are determined to the coupled mKdV equations by means of modified mapping method.

关键词： mKdV equations modified mapping method traveling wave solutions

One SNP in COLD1 Determines Cold Tolerance during Rice Domestication

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Journal of Genetics and Genomics 2015年第4期42卷 133-134页

作者： Yiting shi Zhizhong gong State Key Laboratory of Plant Physiology and Biochemistry College of Biological SciencesChina Agricultural University

With the effect of global climate change on grain yield and distribution of crops, to understand how plant responds to extreme temperature stress is becoming crucial. Plants have evolved fine-tuned mechanisms in response to a wide variety of environmental stresses. During rice （Oryza sativa L.） domestication, two main genotypes are bred and extendedly cultivated in the tropical and subtropical areas in the world： indica （0. sativa ssp. indica） is sensitive to low temperature and mainly cultivated in tropical areas in higher yearly tem- perature; whereas japonica （O. sativa ssp. japonica） is tolerant to low temperature and mainly cultivated in subtropical areas in lower yearly temperature. The chilling sensitivity and resistance of rice cultivars are derived from ancestral Chinese wild rice during rice domestication. Previous studies have indicated that cold tolerance trait of subtropical cultivars is controlled by quantitative trait loci （QTLs）（Miura et al., 2011）. However, the molecular basis for these QTLs has not been well studied.

关键词： SNP RGA QTLs

First-principles study of the co-effect of carbon doping and oxygen vacancies in ZnO photocatalyst

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Chinese Physics B 2021年第2期30卷 419-425页

作者： Jia shi Lei Wang qiang Gu Department of Physics University of Science and Technology BeijingBeijing 100083China

Although tuning band structure of optoelectronic semiconductor-based materials by means of doping single defect is an important approach for potential photocatalysis application,C-doping or oxygen vacancy(Vo)as a single defect in ZnO still has limitations for photocatalytic ***,the influence of co-existence of various defects in ZnO still lacks sufficient ***,we investigate the photocatalytic properties of ZnOx C0.0625(x=0.9375,0.875,0.8125),confirming that the co-effect of various defects has a greater enhancement for photocatalytic activity driven by visible-light than the single defect in *** clarify the underlying mechanism of co-existence of various defects in ZnO,we perform systematically the electronic properties calculations using density functional *** is found that the coeffect of C-doping and Vo in ZnO can achieve a more controllable band gap than doping solely in ***,the impact of the effective masses of ZnO_(x)C_(0.0625)(x=0.9375,0.875,0.8125)is also taken into *** comparison with heavy Vo concentrations,the light Vo concentration(x=0.875)as the optimal component together with C-doping in ZnO,can significantly improve the visible-light absorption and benefit photocatalytic activity.

关键词： first-principles theory electron density of states and band structure of crystalline solids Ⅲ-ⅤandⅡ-Ⅵsemiconductors