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Studies on the Scavenger Activities of Salicylaldehyde and Methyl Salicylate Against Hydroxyl Radical

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Chemical Research in Chinese Universities 2005年第2期21卷 251-252页

作者： majian-hua CollegeofBiologyEngineeringofJimeiUniversity Xiamen361021P.R.China

Active oxygen species have a carcinogenesis effect, and can cause mutation, cardiovascular diseases, inflammation and aging, etc. Hydroxyl radicals generated either from a radiolysis of water contained in biological tissues or from a redox cycling implicated in a wide range chemical toxicants, have been recognized as the extremely reactive oxidative species which can attack DNA bases and sugar moiety of nucleotides and lead to radiation or chemical injury of DNA and other biological targets[1-5].Therefore, In recent years many pharmacologists and biologists are looking for effective free radical scavengers, especially naturally occurring antioxidants of oxidizing free radicals as drugs.

关键词： Salicylaldehyde Methyl salicylate Hydroxyl radical Pulse radiolysis

Fault Tolerant Approach for Data Encryption and Digital Signature Based on ECC System

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Wuhan University Journal of Natural Sciences 2005年第1期10卷 13-16页

作者： ZENGYong majian-feng TheKeyl.aboratoryofComputerNetworkandInformationSecurityofMinistryofEducation XidianUniversityXi＇an710071ShaanxiChina TheKeyl.aboratoryofComputerNetworkandInformationSecurityofMinistryofEducation XidianUniversityXi＇an710071ShaanxiChina

An integrated fault tolerant approach for data encryption and digitalsignature based on elliptic curve cryptography is proposed. Phis approach allows the receiver toverify the sender's identity and can simultaneously deal with error detection and data *** to three errors in our approach can be detected and corrected. This approach has at least thesame security as that based on RSA system, but smaller keys to achieve the same level of *** approach is more efficient than the known ones and more suited for limited environments likepersonal digital assistants (PDAs), mobile phones and smart cards without RSA co-processors.

关键词： fault tolerance dliptic curve cryptography error correction

NUMERICAL ANALYSIS OF THE FLUID FLOW IN A ROTATING CURVED ELLIPTICAL PIPE

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Journal of Hydrodynamics 2005年第2期17卷 171-178页

作者： majian-feng SHENXin-rong ZHANGBen-zhao CHENHua-jun DepartmentofMechanics ZhejiangUniversityHangzhou310027China

A numerical study was conducted for the fully developed laminar flow in rotating curved elliptical pipe. Due to the rotation, the Coriolis force can also contribute to the secondary flow. The interaction of rotation and curvature complicates the flow characteristics. The boundary-fitted coordinate was adopted to study the flow characteristic in the rotating systems. The effects of rotation on the flow transition were studied in detail. The generation and mergence of vortices in rotating curved elliptical pipes were also captured for the first time. The simulation results show that the flow for the case of large aspect ratio of the cross-section is more likely to be unstable than that for smaller one.

关键词： rotating curved elliptical pipe secondary flow boundary-fitted coordinates

Two-Stage Algorithm for Correlating the Intrusion Alerts

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Wuhan University Journal of Natural Sciences 2005年第1期10卷 89-92页

作者： WANGLiang-min majian-feng TheKcyLaboratoryofComputerNetworkandInformationSecurity XidianUniversityXi＇an710071ShaanxiChina／／SehoolofComputerJiangsuUniversityZhenjiang212013JiangsuChina TheKcyLaboratoryofComputerNetworkandInformationSecurity XidianUniversityXi＇an710071ShaanxiChina

To solve the problem of the aleri flooding and information semantics in theexisting Intrusion Detection Sys-tem(IDS), we present a two-stage algorithm for correlating thealerts. In the first stage- the high-level alerts is integrated by using the Chronicle patternsbased on time intervals, which describe and match the alerts with the temporal time constrains of aninput sequence. In the second stage, the preparing relationship between the high-level alerts isdefined, which is applied to eorrtlatethe high-level alerts, and the attack scenario is constructedby drawing the attack graph. In the end a given example show? the performances of this two-stagecorrelation algorithm in decreasing the number and improving the information semantic of theintrusion alerts produced by the IDS.

关键词： intrusion detection alert correlation partial ordering

Electrochemical Studies of Eight New Divalent Transition Metal Benzenesulphonate Ternary Complexes with 1,10-Phenanthroline

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Chemical Research in Chinese Universities 2004年第6期20卷 694-697页

作者： LUYao GUOLi-ping majian-fang YANGJin WUDong-mei FacultyofChemistry NortheastNormalUniversityChangchun130024China CollegeofChemistry＆Pharmocology JiamusiUniversityJiamusi154002China

The electrochemical properties of eight new divalent transition metal benzenesulphonate complexes with 1,10-phenanthroline in different solvents and supporting electrolytes were investigated by means of cyclic voltammetry(CV). Based on the CV data the influences of various coordination modes on the electrochemical behavior of the complexes were discussed. The diffusion coefficient D c and rate constant k s of those complexes in DMF systems were estimated according to CV and the results show that these processes were all quasi-reversible.

关键词： Benzenesulphonate 1,10-Phenanthroline Transition metal complex Cyclic voltammetry

Phosphorus Uptake from Rhizosphere Soil by Two Wheat Cultivars

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Pedosphere 1998年第4期8卷 325-330页

作者： majian T．S．GAHOONIA 等 XingjiangInstituteofEcologyandGeography theChineseAcademyofSciences40SouthBeijingRoadUrumqi830011（C

Inorganic soil phosphorus extractable with sodium bicarbonate (NaHCO3-Pi), soil pH and root hairs length and density in the rhizosphere of two winter wheat cultivars (Triticum aestivum L. cv. Shichun,Sleipner) grown on a high pH Chinese silt loam (52.7 mg NaHCO3-Pi kg-1) and a Danish sandy loam (43.4mg NaHCO3-Pi kg-1) were studied to assess how these wheat cultivars differed in phoephorus *** rhizosphere soil pH of two wheat cultivars grown on the two soils were fairly unchanged with increasing distance from the root surface. However the root hairs of Shichun were 2.1 times longer than those of Sleipner. Root surface area (RSA) of Shichun increased by 192% due to root hairs whereas root hairs of Sleipner increased RSA by 68% only. Hence the root system of Shichun was in contact with more soil than that of Sleipner, even though Sleipner had a longer root. Grown at the lower pH and level of NaHCO3-Pi in the Danish soil Shichun absorbed more inorganic phosphorus than Sleipner whereas at the higher pH and level of NaHCO3-Pi in the Chinese soil there was no phosphorus uptake difference between the two wheat cultivars.

关键词： inorganic phosphorus pH rhizosphere root hair wheat cultivar

The anatomic and electrophysiological characters of the coronary sinus

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Chinese Medical Journal 2005年第5期118卷 404-408页

作者： TANGKai majian ZHANGShu CenterofArrhythmiaDiagnosisandTreatment FuWaiHeartHospitalChineseAcademyofMedicalSciencesandPekingUnionMedicalCollegeBeijing100037China

With the development of the technology of electrophysiological study and radiofrequency catheter ablation, electrophysiologists realized that the coronary sinus (CS) was involved in several types of arrhythmias due to its special anatomic and histological characteristics. In this article we review the anatomy, histology and electrophysiology of the CS and the relation between the CS and selected types of arrhythmias.

关键词： anatomy · electrophysiology · coronary sinus

ANALYTIC METHOD FOR INVERSING THE OPEN BOUNDARY CONDITIONS IN A SEMI-CLOSED SEA AREA—CASE I FOR INVERSING THE TIDAL LEVELS AT OPEN BOUNDARY

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Journal of Hydrodynamics 2004年第5期16卷 590-595页

作者： ZHANGQing-hua YINXun-qiang majian QUYuan-yuan KeyLaboratoryofMarineScienceandNumericalModeling TheFirstInstituteofOceanographyStateOceanicAdministrationQingdao266061China KeyLaboratoryofMarineScienceandNumericalModeling TheFirstInstituteofOceanographyStateOceanicAdministrationQingdao266061China

In this paper, a computational case was employed to describe thecomputational procedure for inversing the tidal level open boundary conditions using an analyticmethod. The area for finding the solution is a circular area with a circular arc with the openingangle 60°-being the open boundary and the other circular arc being the solid wall *** from the reestablished elliptic partial differential equation satisfied by the tidallevel function, the extended spectrum method was used to derive the general solution of the equationfor the sea of constant depth, and the impermeable solid wall condition (the second class boundarycondition) and the adequately specified open boundary conditions were then applied to determine theundetermined coefficients of the general solution, thus obtaining the tidal level distributionfunction. In this way, both the first and second class boundary values at the solid wall boundarywere obtained. With the above boundary values as the boundary conditions, the tidal level values atthe open boundary were then inversed by means of the general solution of tidal wave equation. Thevalidity of inversion method could be verified by comparing the inversed tidal level distributionswith the originally specified open boundary values.

关键词： semi-closed sea open boundary condition extended spectrum method generalsolution of equation in-version

Experience exchangeExperience with intravascular lead extraction

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Chinese Medical Journal 2005年第14期118卷 1217-1219页

作者： majian TANGKai WANGFang-zheng ZHANGShu HUANGCong-xin DepartmentofCardiology thePeople＇sHospitalWuhanUniversityWuhan430063China CenterofArrhythmiaDiagnosisandTreatment CardiovascularInstituteandFuWaiHospitalChineseAcademyofMedicalSciencesandPekingUnionMedicalCollegeBeijing100037China DepartmentofCardiology thePeople＇sHospitalWuhanUniversityWuhan430063China

With the increase of clinical use of cardiac pacemaker, a certain kinds ofsevere leads-related complications ( especially infection ) have presented in a few patients whounderwent pacemaker implantation. The best way to manage this problem is to remove the transvenousleads. The technique for percutaneous removal of transvenous leads have undergone considerabledevelopment in western countries over the past 2 decades. However, there was scarce data on theapplication of this technique in China. This article reports the results of transvenous extractionof 171 permanent pacemaker leads with the standard lead extraction devices and intravascularcounter-traction technique during the period from January 1996 to May 2005 in the Center ofArrhythmia Diagnosis and Treatment, Fu Wai Hospital, Beijing, China.

关键词： lead extraction infection complication