检索结果-南通市图书馆

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

在线全文

学校读者我要写书评

暂无评论

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

EXPERIMENTAL INVESTIGATION AND THERMODyNAMIC CALCULATION ON PHASE PRECIPITATION OF INCONEL 740

在线全文

学校读者我要写书评

暂无评论

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

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

在线全文

学校读者我要写书评

暂无评论

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

Tensile Elastic Behavior of a Zr-Cu-Ag-Al Bulk Metallic Glass

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Materials Science & Technology 2014年第6期30卷 595-598页

作者： Q.P.Cao J.B.Jin Q.yu X.D.Wang D.X.Zhang y.jiang J.Z.jiang International Center for New-Structured Materials (ICNSM) State Key Laboratory of Silicon MaterialsDepartment of Materials Science and Engineering Zhejiang University Department of Mechanical Engineering University of Nevada Reno NV 89557 USA State Key Laboratory of Modern Optical Instrumentation Zhejiang University

Tensile elastic behavior of bulk Zr46（Cu4.5/5.5Ag1/5.5）46Al8 metallic glass was experimentally investigated. It exhibited linear and non-linear time-independent elastic deformation with a demarcative stress of approximately 500 MPa within the timescale in the present work, and repeated loading-unloading before yielding did not alter stress-strain relationship. The pure linear elastic strain limit is 0.6%, significantly lower than 2% as generally reported, but still much higher than 0.1% observed for typical crystalline alloys. Deviation from linear elastic behavior at stresses higher than 500 MPa is explained here as a macroscopic manifestation of local fluctuations in elastic strain, which becomes pronounced at stresses higher than the critical value. The occurrence of non-linear elasticity is possibly also related to the sinusoidal relationship between shear stress and atomic displacement.

关键词： Bulk metallic glass Tension test Elastic-plastic deformation

PHOTOACOUSTIC LINEARIZATION: PRINCIPLE AND APPLICATIONS TO CONTINUOUS SCAN AND STEP-SCAN FT-IR PHOTOACOUSTIC SPECTROSCOPy

在线全文

学校读者我要写书评

暂无评论

PHOTOACOUSTIC LINEARIZATION: PRINCIPLE AND APPLICATIONS TO C...

Modern FT-IR Spectroscopy for Studying Dynamic and Heterogeneous Systems

第十一届北京分析测试学术报告会暨展览会(BCEIA 2005)

作者： Eric y.jiang Thermo Electron Corporation

Derived from the classic Rosencwaig and Gersho photoacoustic theory,the photoacoustic linearization algorithm 1-3 corrects the nonlinearity of strong absorbing bands that have exceeding a critical value,where is the o...

关键词：

来源： cnki会议评论

在线全文

cnki会议

学校读者我要写书评

暂无评论

Modern FT-IR Spectroscopy for Studying Dynamic and Heterogen...

Development of a modular, biocompatible thiolated gelatin microparticle platform for drug delivery and tissue engineering applications

第十二届全国分子光谱学学术会议

作者： Eric y.jiang Thermo Electron Corporation Spectroscopy Division 5225 Verona RoadMadisonWI 53711USA

Introduction Moden FT-IR spectroscopy,in particular,step-scan FT-IR,provides means for investigating dynamic and heterogeneous ***-scan eliminates the time dependence of the interferogram and temporal Fourier frequencies created by continuous-scan,thus it is a very powerful tool for studying time-and/or phase-dependent *** of step-scan FT-IR spectroscopy have been greatly widened since the early 1990’s,in

关键词：

来源： cnki会议评论

在线全文

cnki会议

学校读者我要写书评

暂无评论

Regenerative Biomaterials 2021年第3期8卷 45-56页

作者： Hannah A.Pearce yu Seon Kim Emma Watson Kiana Bahrami Mollie M.Smoak Emily y.jiang Michael Elder Tate Shannon Antonios G.Mikos Department of Bioengineering Rice University6500 Main StreetHoustonTX 77030USA

The field of biomaterials has advanced significantly in the past *** the growing need for high-throughput manufacturing and screening,the need for modular materials that enable streamlined fabrication and analysis of tissue engineering and drug delivery schema has *** are a powerful platform that have demonstrated promise in enabling these technologies without the need to modify a bulk *** building block paradigm of using microparticles within larger scaffolds to control cell ratios,growth factors and drug release holds *** microparticles(GMPs)are a well-established platform for cell,drug and growth factor *** of the challenges in using GMPs though is the limited ability to modify the gelatin *** the present work,we hypothesized that by thiolating gelatin before microparticle formation,a versatile platform would be created that preserves the cytocompatibility of gelatin,while enabling post-fabrication *** thiols were not found to significantly impact the physicochemical properties of the ***,the thiolated GMPs were demonstrated to be a biocompatible and robust platform for mesenchymal stem cell ***,the thiolated particles were able to be covalently modified with a maleimide-bearing fluorescent dye and a peptide,demonstrating their promise as a modular platform for tissue engineering and drug delivery applications.

关键词： gelatin microparticles thiolated gelatin microparticles click chemistry cell delivery drug delivery tissue engineering biomaterials

Characteristics and demographic factors of traditional Chinese medicine constitution types among elderly individuals in China:A national multistage cluster random study Author links open overlay panel

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Traditional Chinese Medical Sciences 2024年第3期11卷 257-263页

作者： Jing Xia Minghua Bai Huirong Song Houqin Li Dayan Zhang Mary y.jiang Ran Chen Feiyu He Cheng Ni Center for Studies in Constitution and Reproductive Sciences of Traditional Chinese Medicine Beijing University of Chinese MedicineBeijing 100029China National Institute of TCM Constitution and Preventive Medicine Beijing University of Chinese MedicineBeijing 100029China Huangsi Comprehensive Outpatient Department Beijing Tongrentang Healthcare Industry Investment Group CompanyBeijing 100032China Zhangjiakou Second Traditional Chinese Medicine Hospital Zhangjiakou 076250China Faculty of Medicine The Chinese University of Hong KongHong Kong 999077China

Objective:To reveal the distribution characteristics and demographic factors of traditional Chinese medicine(TCM)constitution among elderly individuals in ***: Elderly individuals from seven regions in China were selected as samples in this study using a multistage cluster random sampling *** basic information questionnaire and Constitution in Chinese Medicine Questionnaire(Elderly Edition)were *** statistical analysis,chi-squared tests,and binary logistic regression analysis were ***: The single balanced constitution(BC)accounted for 23.9%.The results of the major TCM constitution types showed that BC(43.2%)accounted for the largest proportion and unbalanced constitutions ranged from 0.9%to 15.7%.East China region(odds ratio[OR]=2.097;95%confidence interval[CI],1.912 to 2.301),married status(OR=1.341;95%CI,1.235 to 1.457),and managers(OR=1.254;95%CI,1.044 to 1.505)were significantly associated with ***>70 years was associated with qi-deficiency constitution and blood stasis constitution(BSC).Female sex was significantly associated with yang-deficiency constitution(OR=1.646;95%CI,1.52 to 1.782).Southwest region was significantly associated with phlegm-dampness constitution(OR=1.809;95%CI,1.569 to 2.086).North China region was significantly associated with inherited special constitution(OR=2.521;95%CI,1.569 to 4.05).South China region(OR=2.741;95%CI,1.997 to 1.3.763),Central China region(OR=8.889;95%CI,6.676 to 11.835),senior middle school education(OR=2.442;95%CI,1.932 to 3.088),and managers(OR=1.804;95%CI,1.21 to 2.69)were significantly associated with ***: This study defined the distribution characteristics and demographic factors of TCM constitution in the elderly *** and improving unbalanced constitutions,which are correlated with diseases,can help promote healthy aging through the scientific management of these demographic factors.

关键词： Constitution in Chinese Medicine Questionnaire(Elderly Edition) Body constitution Multistage cluster random sampling Demographic factors Elderly individuals

Evaluating the physicochemical effects of conjugating peptides into thermogelling hydrogels for regenerative biomaterials applications

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Regenerative Biomaterials 2021年第6期8卷 260-272页

作者： Hannah A.Pearce Emily y.jiang Joseph W.R.Swain Adam M.Navara Jason L.Guo yu Seon Kim Andrew Woehr Jeffrey D.Hartgerink Antonios G.Mikos Department of Bioengineering Rice University6500 Main StreetHoustonTX 77030USA Depatment of Chemistry Rice University6500 Main StreetHoustonTX 77030USA

Thermogelling hydrogels,such as poly(N-isopropylacrylamide)[P(NiPAAm)],provide tunable constructs leveraged in many regenerative biomaterial ***,our lab developed the crosslinker poly(glycolic acid)-poly(ethylene glycol)-poly(glycolic acid)-di(but-2-yne-1,4-dithiol),which crosslinks P(NiPAAm-co-glycidyl methacrylate)via thiol-epoxy reaction and can be functionalized with azide-terminated peptides via alkyne-azide click *** study’s aim was to evaluate the impact of peptides on the physicochemical properties of the *** physicochemical properties of the hydrogels including the lower critical solution temperature,crosslinking times,swelling,degradation,peptide release and cytocompatibility were *** gels bearing peptides increased equilibrium swelling indicating hydrophilicity of the hydrogel *** sol fractions were found for all groups,indicating that inclusion of peptides does not impact ***,the inclusion of a matrix metalloproteinase-sensitive peptide allowed elucidation of whether release of peptides from the network was driven by hydrolysis or enzymatic *** hydrophilicity of the network determined by the swelling behavior was demonstrated to be the most important factor in dictating hydrogel behavior over *** study demonstrates the importance of characterizing the impact of additives on the physicochemical properties of *** characteristics are key in determining design considerations for future in vitro and in vivo studies for tissue regeneration.

关键词： thermogelling click chemistry hydrogels peptides poly(N-isopropylacrylamide)