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Studies on the flow and distribution of leukocytes in mesentery microcirculation of rats

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World Journal of Gastroenterology 1999年第3期5卷 231-234页

作者： jiang y Liu AH Zhao KS Mil Med Univ 1st Chinese PLA Lab Shock & Microcirculat Guangzhou 510515 Peoples R China

AIM To study the effect of leukocyteendothelium interaction (LEI) on the flow anddistribution of leukocytes in microcirculationunder physiological *** A microcirculation image multipleparameter computer analysis system (MIMPCAS)was used to study the flow and distribution ofleukocytes in mesentery microcirculation of ratsIn *** The difference of visible leukocyteflux (VLF) was as high as 131 times in thearterioles and venules with similar diameter andblood velocity. The visible leukocytes rolledalong the blood vessel wall as a" jerky"movement. The frequency distribution of thevisible leukocyte velocity (VLV) showed a "twopeak" Curve. The low peak value was at 10 pm/ s-- 15 pm/ s while the high peak fell between25 pm/ s-- 30 pm/ s. With the increase of diameterof venules, VLF increased while the VLVremained at the same level. With the increase ofRBC velocity, VLV trends to elevate and VLF tofal I *** The results herein might providea basic theory for the study on the mechanism ofLEI under physiological condition and novelmethods for the prevention and treatment of highLEI in many pathological

关键词： Studies on the flow and distribution of leukocytes in mesentery microcirculation of rats flow

Combustion modeling in a model combustor

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航空动力学报 2007年第5期22卷 694-703页

作者： L.y.jiang I.Campbell K.Su Institute for Aerospace Research National ResearchCouncil Canada OttawaONK1A 0R6Canada Department of Mechanical Automotiveand Materials EngineeringUniversity of WindsorWindsorONN9B 3P4Canada

The flow-field of a propane-air diffusion flame combustor with interior and exterior conjugate heat transfers was numerically *** obtained from four combustion models,combined with the re-normalization group(RNG) k-ε turbulence model,discrete ordinates radiation model and enhanced wall treatment are presented and *** results are compared with a comprehensive database obtained from a series of experimental *** flow patterns and the recirculation zone length in the combustion chamber are accurately predicted,and the mean axial velocities are in fairly good agreement with the experimental data,particularly at downstream sections for all four combustion *** mean temperature profiles are captured fairly well by the eddy dissipation(EDS),probability density function(PDF),and laminar flamelet combustion ***,the EDS-finite-rate combustion model fails to provide an acceptable temperature *** general,the flamelet model illustrates little superiority over the PDF model,and to some extent the PDF model shows better performance than the EDS model.

关键词：燃烧室燃烧模型扩散火焰热转移

A New Spirostanol Saponin from Allium Chinense

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Chinese Chemical Letters 1997年第11期8卷 965-966页

作者： jiang, y Wang, NL yao, XS Kitanaka, S Shenyang Pharmaceut Univ Dept Nat Prod Shenyang 110015 Peoples R China Nihon Univ Coll Pharm Chiba 274 Japan

A new spirostanol saponin, named chinenoside VI, was isolated from the bulbs of Allium chinense. On the basis of spectral data and chemical evidence, its structure was established as: 25 (R)-24-O-beta-D-glucopyranosyl... 详细信息

关键词： A New Spirostanol Saponin from Allium Chinense

Prediction of the Atomic Electron Affinities Using a Wavelet Neural Network

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Chinese Chemical Letters 1998年第2期9卷 203-206页

作者： Liu, L Shao, XG Cai, WS jiang, y Pan, ZX Univ Sci & Technol China Dept Chem Hefei 230026 Peoples R China Univ Sci & Technol China Dept Appl Chem Hefei 230026 Peoples R China Univ Sci & Technol China Dept Phys Hefei 230026 Peoples R China

Wavelet Neural Network (WNN) was employed in a rapid calculation of the atomic electron affinities, with atomic ionization potentials and atomic electron configurations chosen as input parameters. Many unmeasured valu... 详细信息

关键词： Wavelet Neural Network (WNN) atomic electron affinities

EFFECT OF CARBON MIGRATION ON CREEP PROPERTIES OF Cr5Mo DISSIMILAR WELDED JOINTS WITH Ni-BASED AND AUSTENITIC WELD METAL

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Acta Metallurgica Sinica(English Letters) 2004年第4期17卷 560-568页

作者： J.M.Gong y.jiang S.T.Tu Nanjing University of Technology Nanjing 210009 ChinaNanjing University of Technology Nanjing 210009 ChinaNanjing University of Technology Nanjing 210009 China East China University of Science and Technology Shanghai 200237 China

In this paper, the effect of carbon migration on creep properties of Cr5Mo dissimilar welded joints with Ni-based (Inconel 182) and Cr23Nil3 (A302) austenitic weld metal was investigated. Carbon migration near the weld metal/ferritic steel interface of Cr5Mo dissimilar welded joints was analyzed by aging method. Local creep deformations of the dissimilar welded joints were measured by a long-term local creep deformation measuring technique. The creep rupture testing was performed for Cr5Mo dissimilar welded joints with Inconel 182 and A302 weld metal. The research results show that the maximum creep strain rate occurs in the decarburized zone located on heat affect zone (HAZ) of Cr5Mo ferritic steel. The creep rupture life of Cr5Mo dissimilar welded joints with A 302 weld metal decreases due to carbon migration and is about 50% of that welded with Inconel 182 weld metal.

关键词： dissimilar welded joint carbon migration creep rupture localized deformation

STRUCTURE AND BINDING STATE OF CN_x FILMS SyNTHESIZED By FACING TARGETS SPUTTERING

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Acta Metallurgica Sinica(English Letters) 1999年第5期12卷 752-756页

作者： Tang, D.Q. Wang, y. jiang, E.y. Zhao, C. Sun, F.L. Tianjin Univ Tianjin China

CN x films were made by a facing targets sputtering ( FTS) systemon the  Si(100) substrate under different  N 2 partial pressure.  XRD, XPS, FTIR and Raman Spectroscopy( RS) were measured to investigate the structure and the binding state of the film. The films are amorphous and the  N/C increases with the  N 2 partial pressure increasing and reaches 0 46 when the  N 2 pressure is 100%. The N incorporated  C forms N sp 2C and N sp 3C mainly and there is a small amount of  C≡N.

关键词： Amorphous films Hard disk storage Hardness Nitrides Silicon wafers Sputtering Synthesis (chemical)

Transit Network Design:a Hybrid Enhanced Artificial Bee Colony Approach and a Case Study

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International Journal of Transportation Science and Technology 2013年第3期2卷 243-260页

作者： y.jiang W.y.Szeto T.M.Ng Department of Civil Engineering The University of Hong KongHong KongP.R.China

A bus network design problem in a suburban area of Hong Kong is *** objective is to minimize the weighted sum of the number of transfers and the total travel time of passengers by restructuring bus routes and determining new frequencies.A mixed integer optimization model is developed and was solved by a Hybrid Enhanced Artificial Bee Colony algorithm(HEABC).A case study was conducted to investigate the effects of different design parameters,including the total number of bus routes available,the maximum route duration within the study area and the maximum allowable number of bus routes that originated from each *** model and results are useful for improving bus service policies.

关键词： Transit network design Artificial bee colony algorithm Heuristic

EXPERIMENTAL INVESTIGATION AND THERMODyNAMIC CALCULATION ON PHASE PRECIPITATION OF INCONEL 740

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Acta Metallurgica Sinica(English Letters) 2006年第6期19卷 425-431页

作者： S.Q.Zhao y.jiang J.X.Dong X.S.Xie Department of Physics Ningxia UniversityYinchuan 750021China Department of Materials Science The Northwest Second Nationalities InstituteYinchuan 750021China High Temperature Materials Research Laboratories University of Science and Technology BeijingBeijing 100083China

A novel nickel-based superalloy INCONEL 740 was under development for application in ultra-supercritical superheater tubers above 750℃. The precipitation behaviors of η phase and γ' particles of the alloy were investigated through experimental study and phase computation. Experimental results showed that η phase formed a Widmanst?tten pattern structure following long-term exposure at elevated temperatures and that the coarsening of γ' particle follows a cube rate law:r-3 ∝ t. Thermodynamic calculation results showed that Al and Ti had an important effect on the precipitation behavior of γ' andη phases. Two suggested novel modified alloys, wherein the Al and Ti contents were modified, were designed and melted for the experimental study. The preliminary results indicated that the modified alloys exhibited higher structural stability following long-term exposure at 750℃ till 5000h.

关键词： superalloy INCONEL 740 precipitate thermodynamic calculation

PHySICAL SIMULATION BASED INTELLIGENT SySTEM FOR THE PREDICTION OF SHEET METAL DRAWING CAPABILITy

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Acta Metallurgica Sinica(English Letters) 2000年第2期13卷 451-458页

作者： D.Lv D.N.He X.J.Bao y.Q.Zhang X.y.Ruan J.L.Cheng J.y.jiang National Die&Mold CAD Engineering Research Center Shanghai Jiaotong UniversityShanghai 200030China Shanghai Volkswagen Automotive Company Limited Shanghai 201805China

With the combination of a new theoretical formula, physical simulation experiments, the technology of artificial neural network and database, an intelligent system for the prediction of sheet metal drawing capability is constructed for the first time. A modified criterion for sheet metal drawing capability is proposed in this paper, namely, the Technological Limiting Drawing Ratio, TLDR = f(R, n, s, t, F, μ,r_d,r_p…). Based on the studies of other scholars, a new formula is derived to predict the TLDR in this paper. Then a series of orthogonal physical simulation experiments are designed to investigate the effect of technological parameters on the TLDR, and the results are analyzed in the paper. Then the predicting system is constructed with the combination of the theoretical formula, orthogonal experiments, the technology of artifocial neural network and database. The predicted results show good agreements with experimental data, so it can be used to avoid the blindness in the selection of sheet metal before stamping. The system operates under the Windows operating system, and it supports the mechanism of Client/Server as well as Intranet, so the system has high engineering value.

关键词： TLDR theoretical analysis physical simulation orthogonal experiments neural network database predicting system