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风险感知偏差机理概念模型构建研究

自然灾害学报 2017年第1期26卷 60-66页

作者：黄浪吴超中南大学资源与安全工程学院湖南长沙410083

为完善风险感知理论体系,以风险感知过程为主线,从风险感知信息的识别与收集、编辑与处理、评估与决策3阶段解析风险感知偏差形成过程,分别从个体心理机制与组织因素2个层面探析风险感知偏差形成的内因和外因;基于心理距离理论和解释水... 详细信息

为完善风险感知理论体系,以风险感知过程为主线,从风险感知信息的识别与收集、编辑与处理、评估与决策3阶段解析风险感知偏差形成过程,分别从个体心理机制与组织因素2个层面探析风险感知偏差形成的内因和外因;基于心理距离理论和解释水平理论,构建并解析风险感知偏差的4维心理距离模型。论述了风险感知偏差的放大机制和干预对策。基于此,构建了风险感知偏差机理概念模型。研究结果为探索风险感知偏差的形成与演化机理奠定了理论基础,并可为安全风险管控提供理论支撑。

关键词：风险风险感知感知偏差概念模型心理距离

Effect of forging temperature on the microstructures and mechanical properties of the SiC_p/AZ91 magnesium matrix composite

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Acta Metallurgica Sinica(English Letters) 2010年第2期23卷 99-105页

作者： Kun wu Kunkun DENG Hai CHANG Yewei wu Xiaoshi HU Mingyi ZHENG School of Materials Science and Engineering Harbin Institute of Technology Harbin 150001 China

In this paper, 10 vol. pct SiCp/AZ91 magnesium matrix composite was fabricated by stir casting technology. The ingots were forged at temperatures of 320, 370 and 420 ℃, respectively. XRD, OM and SEM were used to characterize microstructure of the＇composites. It was shown that the clusters of particles in the as-cast composite were largely eliminated, and that the tensile strength was improved obviously.

关键词： Magnesium matrix composite Forging Mechanical properties

Ni3S2 nanorods growing directly on Ni foam for all-solid-state asymmetric supercapacitor and efficient overall water splitting

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Journal of Energy Chemistry 2020年第7期29卷 178-186,I0006页

作者： Baoxin wu Hao Qian zhongwu Nie zhongping Luo Zixu wu Peng Liu Hao He Jianghong wu Shuguang Chen Feifei Zhang School of Materials Science and Engineering Changsha University of Science and TechnologyChangsha 410114HunanChina College of Health Science and Environmental Engineering Shenzhen Technology UniversityShenzhen 518118GuangdongChina Department of Materials Science and Engineering Faculty of EngineeringNational University of SingaporeSingapore 117576Singapore

Transition metal compounds are attractive for their significant applications in supercapacitors and as non-noble metal catalysts for electrochemical water ***,we develop Ni3 S2 nanorods growing directly on Ni foam,which act as multifunctional additive-free Ni3 S2@Ni electrode for supercapacitor and overall water *** on PVA-KOH gel electrolyte,the assembled all-solid-state Ni3 S2@Ni//AC asymmetric supercapacitor delivers a high areal energy density of 0.52 mWh cm^-2 at an areal power density of 9.02 MW cm^-2,and exhibits an excellent cycling stability with a capacitance retention ratio of 89%after 10000 GCD cycles at a current density of 30 mA cm^-*** hydrogen evolution reaction and oxygen evolution reaction in 1 M KOH,Ni3 S2@Ni electrode achieves a benchmark of 10 mA cm^-2at overpotentials of 82 mV and 310 mV,***,the assembled Ni3 S2@Ni‖Ni3 S2@Ni electrolyzer for overall water splitting attains a current density of 10 mA cm^-2 at 1.61 *** in-situ synthesis of Ni3 S2@Ni electrode enriches the applications of additive-free transition metal compounds in high-performance energy storage devices and efficient electrocatalysis.

关键词： Ni3S2 Supercapacitor All-solid-state Water splitting

Cryptanalysis of an MOR cryptosystem based on a finite associative algebra

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Science China(Information Sciences) 2016年第3期59卷 137-145页

作者： Wanqing wu Huanguo ZHANG Houzhen WANG Shaowu MAO Shuomei wu Haiqing HAN Computer School of wuhan University Computer Department Shijiazhuang University School of Mathematics and Physics Hubei Polytechnic University

The Shor algorithm is effective for public-key cryptosystems based on an abelian group. At CRYPTO 2001, Paeng（2001） presented a MOR cryptosystem using a non-abelian group, which can be considered as a candidate scheme for post-quantum attack. This paper analyses the security of a MOR cryptosystem based on a finite associative algebra using a quantum algorithm. Specifically, let L be a finite associative algebra over a finite field F. Consider a homomorphism φ : Aut（L） → Aut（H） × Aut（I）, where I is an ideal of L and H ■ L/*** compute dim Im（φ） and dim Ker（φ）, and combine them by dim Aut（L） = dim Im（φ） + dim Ker（φ）. We prove that Im（φ） = Stab Comp（H,I）(μ + B;（H, I）) and Ker（φ）■ Z;（H, I）. Thus, we can obtain dim Im（φ）, since the algorithm for the stabilizer is a standard algorithm among abelian hidden subgroup algorithms. In addition,Z;（H, I） is equivalent to the solution space of the linear equation group over the Galois fields GF（p）, and it is possible to obtain dim Ker（φ） by the enumeration theorem. Furthermore, we can obtain the dimension of the automorphism group Aut（L）. When the map ? ∈ Aut（L）, it is possible to effectively compute the cyclic group ? and recover the private key a. Therefore, the MOR scheme is insecure when based on a finite associative algebra in quantum computation.

关键词： MOR cryptosystem cryptanalysis quantum algorithm finite associative algebra hidden subgroup problem stabilizer

Local scour by multiple slit-type energy dissipaters

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Journal of Hydrodynamics 2020年第6期32卷 1221-1224页

作者： Li Yao Jian-hua wu College of Water Conservancy and Ecological Engineering Nanchang Institute of TechnologyNanchang330099China College of Water Conservancy and Hydropower Engineering Hohai UniversityNanjing210098China

Energy dissipation and scour control are all the key issues for the design of hydraulic *** the basis of the high energy dissipation for the multiple slit-type energy dissipaters(M-STED)developed by the authors,in this work,the characteristics of the scour hole for the M-STED were experimentally investigated through three sets of those physical models with five cases and a scour hole form index was *** results show that,the M-STED results in not only the high energy dissipation but also the mild upstream slope of the scour hole thanks to the scour hole form index of larger than 0.5,which is in favor of the safety of the release works.

关键词： Energy dissipation scour scour hole form index multiple slit-type energy dissipater

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安全科学学的初步研究

中国安全科学学报 2007年第11期17卷 5-15页

作者：吴超中南大学资源与安全工程学院

从安全科学学的高度,论述安全学科的属性为综合属性,并认为开展安全科学学的研究,才能获得更加重要、更具原创性和更加系统性的理论研究成果。笔者从发展安全学科的角度出发,给出了安全科学学、安全科学方法学、安全科学学公理、比较安... 详细信息

从安全科学学的高度,论述安全学科的属性为综合属性,并认为开展安全科学学的研究,才能获得更加重要、更具原创性和更加系统性的理论研究成果。笔者从发展安全学科的角度出发,给出了安全科学学、安全科学方法学、安全科学学公理、比较安全学的基本定义和内涵;从安全学科的属性总结出5条安全科学学公理;指出安全科学学的研究,可以以安全科学方法学的研究作为突破口,安全科学方法学的研究可以以比较安全学作为切入点;还从多个角度对安全科学方法学进行了分类;指出现在安全科学基础研究非常薄弱,安全学科的发展需要更多的研究者投入到安全科学的研究领域中。笔者的论文是第一篇比较系统开展安全科学学研究的论文,对安全学科的发展具有理论指导作用。

关键词：安全学科科学学方法学公理研究方向

Synchronous conjugation of i-motif DNA and therapeutic siRNA on the vertexes of tetrahedral DNA nanocages for efficient gene silence

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Acta Pharmaceutica Sinica B 2021年第10期11卷 3286-3296页

作者： Xiu Han Xiang Xu Ziheng wu Zhenghong wu Xiaole Qi Key Laboratory of Modern Chinese Medicines China Pharmaceutical UniversityNanjing 210009China Medical School of Nanjing University Nanjing UniversityNanjing 210093China Parkville Campus Monash UniversityVIC 3052Australia

The functionality of DNA biomacromolecules has been widely excavated,as therapeutic drugs,carriers,and functionalized modification *** this study,we developed a series of DNA tetrahedron nanocages(Td),via synchronous conjugating different numbers of i-(X)and therapeutic siRNA on four vertexes of tetrahedral DNA nanocage(aX-Td@bsiRNA,a+b=4).This i-motif-conjugated Td exhibited good endosomal escape behaviours in A549 tumor cells,and the escape efficiency was affected by the number of ***,the downregulating mRNA and protein expression level of epidermal growth factor receptor(EGFR)caused by this siRNA embedded Td were verified in A549 *** tumor growth inhibition efficiency of the 2X-Td@2siRNA treated group in tumorbearing mice was significantly higher than that of non-i-motif-conjugated Td@2siRNA(3.14-fold)and free siRNA(3.63-fold).These results demonstrate a general strategy for endowing DNA nanostructures with endosomal escape behaviours to achieve effective in vivo gene delivery and therapy.

关键词： i-motif siRNA Gene delivery DNA tetrahedron Endosomal escape Cancer Gene silence Biocompatibility

Mesoscopic analysis of the utilization of hardening model for a description of softening behavior based on disturbed state concept theory

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Journal of Zhejiang University-Science A(Applied Physics & Engineering) 2008年第9期9卷 1167-1175页

作者： Jian-ye ZHENG An-li wu Guangzhou Metropolis Construction Commission Guangzhou 510030 China College of Civil Engineering and Architecture lnner Mongolia University of Technology Hohhot 010051 China

Mesoscopic characteristics of a clayey soil specimen subjected to macroscopic loading are examined using a medi- cal-use computerized tomography (CT) instrument. Disturbed state concept (DSC) theory is based on the utilization of the hard- ening model. DSC indirectly describes material behavior by claiming that the actual response of the material is expressed in terms of the relative intact (RI) response and the fully adjusted (FA) response. The occurrence of mesoscopic structural changes of material has similarities with the occurrence of a macroscopic response of the material under loadings. In general, the relative changing value of a softening material is three to five times more than that of a hardening material. Whether special zones exist or not in a specimen cross section does not affect the following conclusion: hardening material and softening material show me- chanical differences with CT statistical indices values prominently changing, and the change is related to the superposing of a disturbance factor. A new disturbance factor evolution function is proposed. Thus, mesoscopic statistical indices are introduced to describe macroscopic behavior through the new evolution function. An application of the new evolution function proves the effectiveness of the amalgamation of a macroscopic and a mesoscopic experimental phenomenon measurement methods.

关键词： Constitutive model Disturbed state concept (DSC) Computerized tomography (CT) Softening

TIME ANALYTICITY FOR THE HEAT EQUATION ON GRADIENT SHRINKING RICCI SOLITONS

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Acta Mathematica Scientia 2022年第4期42卷 1690-1700页

作者： Jiayong wu Department of Mathematics Shanghai UniversityShanghai200444China

On a complete non-compact gradient shrinking Ricci soliton,we prove the analyticity in time for smooth solutions of the heat equation with quadratic exponential growth in the space *** growth condition is *** an application,we give a necessary and sufficient condition on the solvability of the backward heat equation in a class of functions with quadratic exponential growth on shrinkers.

关键词： Gradient shrinking Ricci soliton heat equation time analyticity