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Efficient and secure three-party authenticated key exchange protocol for mobile environments

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Journal of Zhejiang University-Science c(computers and Electronics) 2013年第5期14卷 347-355页

作者： chih-ho chou Kuo-yu TSAI Tzong-chen WU Kuo-hui YEH Department of Information Management National Taiwan University of Science and Technology Department of Management Information Systems Hwa Hsia Institute of Technology Department of Information Management National Dong Hwa University

Yang and chang (2009) proposed a three-party authenticated key exchange protocol for securing communications in mobile-commerce environments. Their protocol reduces computation and communication costs by employing elliptic curve cryptosystems. However, Tan (2010) pointed out that Yang and chang (2009)'s protocol cannot withstand impersonation and parallel attacks, and further proposed an enhanced protocol to resist these attacks. This paper demonstrates that Tan (2010)'s approach still suffers from impersonation attacks, and presents an efficient and secure three-party authenticated key exchange protocol to overcome shown weaknesses.

关键词： Three-party Key exchange Authentication Mobile environments

A New Symmetric Model for predicting Ternary Thermodynamic.p.operties from its Three Binary Systems

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Rare Metals 1989年第4期9卷 12-17页

作者： K.-c.chou R.-Q.Li University of Science and Technology Beijing General Research Institute for Non-ferrous Metals Beijing

A new symmetric model for predicting ternary thermodynamic.p.operties from its three binary systems has been presented. The application of this new model to the prediction of the ternary mixing enthalpy of Ga-Bi-Sn system and the ternary excess Gibbs energy of Agcl-Licl-Kcl system shows that the calculated results are close to the experimental data.

关键词： A New Symmetric Model for predicting Ternary Thermodynamic.p.operties from its Three Binary Systems

A Dynamic Model for the processive Motion of Dynein on Microtubules

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Advances in Biological chemistry 2016年第2期6卷 43-54页

作者： Yi-Feng Hsiao Y. c. chou Department of physics National Tsing-Hua University Taiwan

We propose a dynamic mechanism for the processive motility of dynein on microtubules (MTs). The force generated for the motion of dynein is purely mechanical in origin. When a dynein monomer binds to a MT, the AAA ring of dynein might fit into one of the trenches on the outer surface of the MT, with the linker domain leaning on the ratchet-shaped protofilament. At room temperature, the dynein molecule exhibits random thermal motion on the outer surface of the MT. The collision between the asymmetric ratchet teeth and the linker exerts a reactive impulsive force on the dynein molecule. The probability of producing an impulse with a longitudinal component pointing to either end of the MT depends on the instantaneous motion of dynein, the shape of the linker, and the mass distribution of the dynein with/without a load. In the dynamic mechanism, dynein monomers can move independently and processively toward either end of the MT. Many observations of the motility of dynein can be reproduced in a simulation system.

关键词： Dynamic Mechanism Dynein processive Motility

Synthesis of Al_(4)Sic_(4) powders via carbothermic reduction: Reaction and grain growth mechanisms

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Journal of Advanced ceramics 2017年第4期6卷 351-359页

作者： Xinming XING Junhong cHEN Guoping BEI Bin LI Kuo-chih chou Xinmei HOU School of Material Science and Technology University of Science and Technology BeijingBeijing 100083China Department of Materials Science and Engineering 3MEDelft University of TechnologyDelft2628CDthe Netherlands State Key Laboratory of Advanced Metallurgy University of Science and Technology BeijingBeijing 100083China

Highly pure Al_(4)Sic_(4) powders were prepared by carbothermic reduction at 2173 K using Al_(2)O_(3),SiO_(2),and graphite as raw *** obtained Al_(4)Sic_(4) powders owned hexagonal plate-like grains with a diameter of about 200-300μm and a thickness of about 2-6μ*** on the experimental results,the reaction of Al_(4)Sic_(4) formation and grain evolution mechanisms were determined from thermodynamic and first-princ.p.es *** results indicated that the synthesis of Al_(4)Sic_(4) by the carbothermic reduction consisted of two parts,i.e.,solid-solid reactions initially followed by complex gas-solid and gas-gas *** grain growth mechanism of Al_(4)Sic_(4) featured a two-dimensional nucleation and growth *** gas phases formed during the sintering process favored the preferential grain growth of(0010)and(110)planes resulting in formation of hexagonal plate-like Al_(4)Sic_(4) grains.

关键词： Al_(4)Sic_(4) carbothermic reduction hexagonal plate-like growth mechanism

Study on Electronic conductivity of caO-SiO2-Al2O3-FeOx Slag System

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Journal of Iron and Steel Research International 2000年第1期7卷 9-13页

作者： LU Xiong-gang LI Fu-shen LI Li-fen chou Kou-chih University of Science and Technology Beijing Shanghai University

A study on electronic conductivity of caO-SiO2-Al2O3-FeOxslag system with Wagner polarization technique was carried *** experimental data show that electronic conductivity is consisted of free electron conductivity and electron hole conductivity and both are related to the content of Fe3+and Fe2+.Free electron conductivity is decreasing and electron hole conductivity is increasing while Fe3+changes to Fe2+.There is a maximum electronic conductivity at some ratio of ferric ions Fe3+to total ion *** the experimental conditions,the electronic conductivity is in the range of 10-4—10-2S/cm.

关键词： smelt slag electron hole electronic conductivity

Effect of Acid Treatment on Electrocatalytic.p.rformance of ptNi catalyst

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chemical Research in chinese Universities 2021年第3期37卷 686-695页

作者： GUO Ruihua QIAN Fei AN Shengli ZHANG Jieyu chou Kuo-chih YE Jinyu ZHOU Zhiyou School of Materials and Metallurgy Inner Mongolia University of Science and TechnologyBaotou014010P.R.China Inner Mongolia Key Laboratory of Advanced ceramics and Device School of Materials and MetallurgyInner Mongolia University of Science and TechnologyBaotou014010P.R.China School of Materials Science and Engineering Shanghai UniversityShanghai200072P.R.China collaborative Innovation center of chemistry for Energy Materials State Key Laboratory of Physical Chemistry of Solid SurfacesCollege of Chemistry and Chemical EngineeringXiamen UniversityXiamen361005P.R.China

In this paper,we describe the synthesis of the Ac.p.Ni/G catalysts with graphene as the carrier,via the alcohol reduction and the sulfuric acid *** prepared catalysts were microsc.p.cally characterized by X-ray diffractometry(XRD),X-ray photoelectron spectrosc.p.(XpS),scanning electron microsc.p.(SEM),electron spectrosc.p.(EDAX),and transmission electron micros-c.p.(TEM).We tested the electrochemical performance of the prepared catalysts using an electrochemical workstation and in situ infrared spectrosc.p.(FTIR).The results showed that the acid-treated Ac.p.Ni/G catalysts had a more uniform dispersion and with the increased of treatment time,the particle size of the catalyst became *** the electrocatalytic.p.rformance of the Ac.p.Ni/G-48h catalyst treated with sulfuric acid for 48 h was significantly better than that of the untreated ptNi/G *** electrochemically active surface area was 76.63 m^(2)/g,and the peak current density value for catalytic oxidation of ethanol was 1218.83 A/g,which was 10 times that of ordinary commercial pt/c *** steady-state current density value of 1100 s was 358.77 A/g,and it has excellent anti-cO toxicity *** was determined that a sulfuric acid treatment controlled catalyst particle size and increased the electrocatalytic activity of the catalytic oxidation of ethanol.

关键词： platinum Graphene Acid treatment particle size Electrocatalytic oxidation

Two new triterpenoids from psidium guajava

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chinese chemical Letters 2012年第7期23卷 827-830页

作者： Ji cheng Shu Jian Qun Liu Gui Xin chou Zheng Tao Wang The MOE Key Laboratory for Standardization of chinese Medicines and SATcM Key Laboratory for New Resources and Quality Evaluation of chinese Medicines Institute of Chinese Materlaz Medica of Shanghai University of Traditional Chinese MedicineShanghai 201203China Key Laboratory of Modern preparation of Traditional chinese Medicines Ministry of EducationNanchang 330004China

Two new triterpenoids,named as 2 α,3 β,23-trihydroxylurs-12,20（30）-dien-28-oic acid β-D-gluc.p.ranoside（1）,and 2 α,3 β,6 β,20 β,23,30-hexahydroxyurs-12-en-28-oic acid（2）,together with four known triterpenoids were isolated from the leaves of psidium guajava *** structures were elucidated on the basis of mass and spectral evidence.

关键词： psidium guajava Triterpcnoid

Application of Sodium Ion Sensor Based on the SnO_2/ITO Glass in the Detection of Rinsing Solution for contact Lenses

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稀有金属材料与工程 2006年第A3期35卷 240-241页

作者： Jui-Fu cheng Jung-chuan chou Tai-ping Sun Shen-Kan Hsiung Institute of Electronic Engineering Chung Yuan Christian University Chung-Li Taiwan 320 China Graduate School of Electronic Engineering National Yunlin University of Science and Technology Douliou Taiwan 640 China Institute of Electrical Engineering National Chi Nan University Nantou Taiwan 545 China

This paper presents the studying results of the sodium ion sensor device based on the SnO_2/ITO glass structure in the detection of rinsing solution for contact *** selective membrane contains poly (vinyl chloride) (pVc),bis (2-ethylhexyl) sebacate (DOS),(12-crown-4) methylmalonate (B12c4),and sodium tetrakis (4-fluoropbenyl) borate dehydrate (NaTFBD). The final weight ratios are pVc:DOS:B12c4:NaTFBD=33:66:2:*** this condition,the sensor has performances with linear sensitivity,short response time,good repeatability and *** sensor was used to measure the rinsing solution for the contact *** the experimental results show close to the accurate value for four commercial products,this sensor can preliminary be used in detecting the rinsing solution for the contact *** this structure and sodium-sensing membrane to construct the sodium sensor is proven successfully in this application.

关键词： sodium ion sensor solution for contact lenses tin oxide electrode B12c4

Mechanism underpinning effects of Shichangpu(Rhizoma Acori Tatarinowii) on attention deficit hyperactivity disorder

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Journal of Traditional chinese Medicine 2020年第1期40卷 94-102页

作者： Feng Kai Zhao Ying Ren Xinxin chou Yiqian Yu Qingyang Li Ling Wang Junhong Dongzhimen Hospital Beijing University of Chinese MedicineBeijing 100700China chengdu University of Traditional chinese Medicine Chengdu 610075China Shandong University of chinese Medicine Jinan 250355China Department of pediatrics Dongzhimen HospitalBeijing University of Chinese MedicineBeijing 100700China

OBJEcTIVE:To investigate the mechanism underlying the effects of Shichangpu(Rhizoma Acori Tatarinowii)on attention deficit hyperactivity disorder(ADHD).METHODS:A network pharmacology approach integrating ingredients of Shichangpu(Rhizoma Acori Tatarinowii)and target with ADHD,network construction,molecular function interactions and pathway analysis was ***:This approach successfully helped to identify 7 active ingredients of cN,interacting with21 key targets(ADRA1 A,ADRA1 B,ADRA2 A,ADRA2 B,ADRA2 c,ADRB1,ADRB2,cHRM1,cHRM2,cHRM3,pTGS1,SLc6 A2,SLc6 A3,SLc6 A4,DRD1,DRD5,HTR2 A,ADRA1 D,MAOB,GRIA2,HTR1 A).The molecular function interactions among candidate targets mainly consisted of four groups:G-protein coupled amine rec.p.or activity,catecholamine binding,monoamine transmembrane transporter activity and neurotransmitter rec.p.or *** Encyclopedia of Genes and Genomes pathway enrichment analysis indicated that Shichangpu(Rhizoma Acori Tatarinowii)-regulated pathways were mainly classified into signal transduction and monoamine ***:Our investigation revealed that Shichangpu(Rhizoma Acori Tatarinowii)could improve the symptoms of ADHD by regulating neurotransmitter,in multiple types of compounds-target-pathway,which may be implicated in the major pathological processes of ADHD.

关键词： Attention deficit disorder with hyperactivity Shichangpu(Rhizoma Acori Tatarinowii) plants,medicinal pharmacology