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311篇 您的检索式:作者名="Y.C."
    题名 作者 年代 出处 被引量
1A review on the generation, determination and mitigation of Urban Heat Island显示文摘当在第 21 世纪的主要问题之一由于人的文明的都市化和工业化摆姿势到人,城市的热岛(UHI ) 被考虑。当他们消费,从城市的结构产生的大量热并且重新散发太阳辐射,并且从人为的热,来源是 UHI 的主要原因。二热来源作为与它的环境相比增加一个城市的区域的温度,它作为城市的热岛紧张(UHII ) 被知道。这个问题与大人口和广泛的经济活动在城市或宗主国里是甚至更坏的。30 亿个人在世界上住在估计城市的区域直接暴露于这个问题,它在不久的将来将显著地被增加。由于这个问题的严厉,广阔研究努力被奉献了,大量文学为这个题目是可得到的。在这个区域可得到的文学包括最近的研究途径,概念,方法论,最近的调查工具和缓解措施。这研究被执行通过 UHI 的最重要的特征的调查考察并且总结这个研究区域。热由应该被调查在的最重要的角色详细说明学习特别的城市的加热的城市的结构戏重新散发,这被结束 UHI。未来研究应该为减少城市的热岛的效果并且最终住在更好的环境集中于设计和计划参数,这也被结束。RIZWAN Ahmed Memon DENNIS Y.C. Leung LIU Chunho 2008Journal of Environmental Sciences2008,20,1:116
2What is going on in magnesium alloys?显示文摘China has been developed into one of the most active regions in terms of both fundamental and applied research on magnesium(Mg) and its alloys in the world from a solid base laid by its prominent metallurgist and materials scientists over the past decades. Nowadays, a large number of young-generation researchers have been inspired by their predecessors and become the key participants in the fields of Mg alloys, which consequently led to the establishment of China Youth Scholar Society for Magnesium Alloys Research in 2015. Since then, the first two China Youth Scholars Symposiums on Mg Alloys Research had been held at Harbin(2015) and Chongqing(2016) China, respectively. A number of crucial research interests related to fundamental and applied Mg research were discussed at the conferences and summarized in this short perspective, aiming to boost far-reaching initiatives for development of new Mg-based materials to satisfy the requirements for a broad range of industrial employments. Herein, four main aspects are included as follows: i) Plastic deformation mechanism and strengthening strategy, ii) Design and development of new Mg-based materials, iii) Key service properties, and iv) New processing technologies.X.J. Wang D.K. Xu R.Z. Wu X.B. Chen Q.M. Peng L. Jin Y.C. Xin Z.Q. Zhang Y. Liu X.H. Chen G. Chen K.K. Deng H.Y. Wang 2018Journal of Materials Science & Technology2018,34,2:35
3Layered Machinable and Electrically Conductive Ti_2AlC and Ti_3AlC_2 Ceramics:a Review显示文摘Ti2AlC and Ti3AlC2 are the most light-weight and oxidation resistant layered ternary carbides belonging to the MAX phases.This review highlights recent achievements on the processing,microstructure,physical,mechanical and chemical properties of these two machinable and electrically conductive carbides.Ti2AlC and Ti3AlC2 display superior properties such as fracture toughness,electrical and thermal conductivities,and oxidation resistance over their binary counterpart.This paper provides a comprehensive overview of the processing-microstructure-property correlations of these two carbides.Potential fields of applications for Ti2AlC and Ti3AlC2 are surveyed.In addition,we point out methods for further improving their properties in some specific applications through appropriate structural design and modification.X.H. Wang Y.C. Zhou 2010Journal of Materials Science & Technology2010,26,5:34
4High-Temperature Oxidation Behavior of a Ni-Cr-W-Al Alloy显示文摘A study was conducted to examine the isothermal oxidation behavior of a new Ni-Cr-W-Al alloy in air at 1250℃ with different time. Oxidation kinetics was determined from weight-change measurements. The microstructure and composition of the oxide scale were investigated by means of scanning electron microcopy and X-ray diffraction. The results showed that the oxide scales of the alloy were a compact and continuous outer Cr2O3 and NiCr2O4 layer and an inner Al2O3 layer that was in dendrite shape. Oxides scales with good adherence were formed on the surface of the alloy, which made the alloy perform excellent high-temperature oxidation resistance.Y.C. Ma X.J. Zhao M. Gao K. Liu 2011Journal of Materials Science & Technology2011,27,9:6
5Effects of Boron Addition on Grain Refinement in TiAl-based Alloys显示文摘Solid state phase transformation characteristics of the body centred β(Ti) into the hexagonal closed packed α(Ti) in Ti45Al8Nb-(0, 0.3, 0.5 and 0.8 at. pct) B alloys were investigated by heat treatment to clarify γ/α2 lamellar microstructure refinement induced by B addition. Experimental results confirmed two kinds of boron-reduced grain refinement mechanisms through refining either β phase then α phase (β-refinement) or α phase directly (α-refinement) to refine lamellar microstructure at room temperature; however, the role of α-refinement dominated the as-cast lamellar microstructure refinement over β-refinement in Ti45Al8NbxB alloy. It was also found that during the α-refinement the convoluted flake- and plate-like borides along β grain boundaries assisted nucleation of α phase, and the particle-like borides near β grain boundaries impeded α phase growth.W.D. Wang,Y.C. Ma,B. Chen,M. Gao,K. Liu and Y.Y. Li Institute of Metal Research,Chinese Academy of Sciences,Shenyang 110016,China 2010Journal of Materials Science & Technology2010,26,7:5
6A sperm GPI-anchored protein elicits sperm-cumulus cross-talk leading to the acrosome reaction显示文摘Yin, L. Chung, C. M. Huo, R. Liu, H. Zhou, C. Xu, W. Zhu, H. Zhang, J. Shi, Q. Wong, H. Y.C. Chen, J. Lu, Y. Bi, Y. Zhao, C. Du, Y. Ma, M. Cai, Y. Chen, W. Y. Fok, K. L. Tsang, L. L. Li, K. Ni, Y. Chung, Y. W. Zhou, Z. Sha, J. Chan, H. C. 2009南京医科大学学报(自然科学版)2009,29,4:5
7STUDY ON VERTICAL WATER TEMPERATURE MODEL FOR MIYUN RESERVOIR显示文摘According to the characters of the Miyun reservoir located in northeast Beijing, one dimensional method is used to establish the mathematical model of temperature for the reservoir. In this model the heat exchange between water surface and atmosphere, effective diffusion, inflows, outflows, and thermal advection are considered comprehensively. The effective diffusion coefficient, decay coefficient of short wave in water, etc. are calibrated based on the observed stratification data of 1991 in the reservoir. The mathematical model is verified well with the data of 1992. This model can be used to predict the temperature distribution along the vertical direction for the Miyun reservoir and other similar reservoir.Li, Y.L. Chen, Y.C. Zhang, B.X. 2000Journal of Hydrodynamics2000,12,4:5
8SIMULATION OF THE TWIN ROLL STAINLESS STRIP CASTING PROCESS显示文摘The position of the solidification completed temperature of twin roll stainless strip casting process is very important to the quality of the casting strip. In order to control this position, the .solidification completed temperature should be known at first. The present paper first. simulated dendritic microsegregation under conditions of twin roll stainless strip casting, and got the relationship between the temperature and solid fraction of the mush zone. The temperatures such as ZDT (equal to the solidifica- tion completed temperature and LIT (liquid impenetrable temperature), et al., also were obtained. Then by using the turbulent model, the flow and thermal fields of the pool of the twin roll stainless strip casting, and the speed and temperature fields oj different casting speeds were given cud also explained. The results are coincident with the experimental result. Combined with the results of these two simulations, the appropriated casting speed was found.Y.C. Miao, X.M. Zhang, G.D. Wang, H.S. Di and X.H. Liu (State Key Laboratory of Rolling and Automation, Northeastern University, Shenyang 110004, China) 2001Acta Metallurgica Sinica(English Letters)2001,14,3:4
9A critical review of experimental results and constitutive descriptions for metals and alloys in hot working显示文摘Y.C. Lin Xiao-Min Chen 2010Materials and Design2010,,4:4
10An Inverse Approach for Extracting Elastic-plastic Properties of Thin Films from Small Scale Sharp Indentation显示文摘An inverse method for extracting the elastic-plastic properties of metallic thin films from instrumented sharp indentation has been proposed in terms of dimensional analysis and finite element modeling.A wide range of materials with different elastic modulus,yield strength,and strain-hardening exponent were examined.Similar to the Nix-Gao model for the depth dependence of hardness H,(H/H0)2=1+h*Hh,the relationship between elastic modulus E and indentation depth h can be expressed as(E/E0)4=1+h*Eh.By combining these two formulas,we find that there is a relationship between yield stress σ y and indentation depth h:σy = σy0·(1+h*Hh)f(n)·(1+h*Eh)[0.25-0.54f(n)],where σ y0 is the yield strength associated with the strainhardening exponent n,the true hardness H0 and the true elastic modulus E0.f(n)= 1/2(1-n) is constant,which is only related to n,and h*H and h*E are characteristic lengths for hardness and elastic modulus.The results obtained from inverse analysis show that the elastic-plastic properties of thin films can be uniquely extracted from the solution of this relationship when the indentation size effect has to be taken into account.Z.S. Ma Y.C. Zhou S.G. Long C.S. Lu 2012Journal of Materials Science & Technology2012,28,7:4
11儒家学说中的个人与群体:从关系出发的观点显示文摘家族的重要地位在一个以人为中心的社会,孔子创立了一种人本主义的伦理学。儒家所关注的是现实的社会生活,如何建立一个凡俗与和谐的社会,是儒家孜孜以求的理论和实践问题。论及个人与群体的关系,首先,儒家从来不把个人看作独立存在的实体,而是把人理解为社会性的存在。儒家认为,“五伦”是人的最基本的社会关系。这五种关系及其相应的道德规定是:父母与孩子间的“亲”,统治者与百姓间的“义”,丈夫与妻子间的“别”,年长者与年幼者间的“序”。安布罗斯.Y.C.金 张海燕 1990国外社会科学1990,,5:3
12Imaging iron stores in the brain using magnetic resonance imaging显示文摘E. Mark Haacke Norman Y.C. Cheng Michael J. House Qiang Liu Jaladhar Neelavalli Robert J. Ogg Asadullah Khan Muhammad Ayaz Wolff Kirsch Andre Obenaus 2005Magnetic Resonance Imaging2005,,1:3
13光催化剂纳米粉体的制备技术显示文摘纳米半导体材料作为光催化剂在环境、能源领域具有广阔的应用前景。光催化剂的制备过程对催化剂的晶体结构有重要的影响,从而影响其光催化活性。本文较系统地综述了国内外对光催化剂纳米粉体制备的研究进展,包括固相法、气相法和湿化学法。对比分析了各种制备技术的优缺点,并对今后的研究方向和应用前景进行了分析。倪萌 Leung Michael K.H. Leung Dennis Y.C. 2006粉末冶金技术2006,24,5:3
14RESEARCH AND SIMULATION OF THE INFLUENCE OF THREE-AXIAL COMPACTION ON POWDER METALLURGIC PRODUCT PROPERTIES显示文摘温暖的粉末压缩过程被有限元素分析软件模仿, MSC/MARC。热机械地联合的分析方法根据更新的 Lagrangian 方法被使用,到模仿温暖的粉末压缩过程。温暖的粉末压缩过程被模仿,并且磨擦状况的影响和紧迫的式样在某些温度在粉末绿色和力学行为的密度上被研究。结果显示为圆柱的协议,与磨擦条件的改进,绿相对密度的分发的一致性是大部分改善了,紧迫的力量和应力减少,并且非一致压过程在某种程度上影响绿密度的分发。穿孔机第一最后压并且死的过程的压力分发的地位出版社与另外的三个过程不同,并且介绍‘ f lume' 的数字。D. G. Wang Y.C. Wu M.H. Jiao T.Xie J.W. Yu K G. Fin 2008Acta Metallurgica Sinica(English Letters)2008,21,2:3
15c-Jun N-terminal kinase (JNK) signaling: Recent advances and challenges显示文摘Marie A. Bogoyevitch Kevin R.W. Ngoei Teresa T. Zhao Yvonne Y.C. Yeap Dominic C.H. Ng 2009BBA - Proteins and Proteomics2009,,3:3
16PREPARATION OF NANOMETER ZINC OXIDE BY EVAPORATION METHOD显示文摘Nanometer ZnO particles were synthesized by evaporating of zinc powders of averageparticle size of 370μm studied by XRD, TEM and electron diffraction. The particleswere formed by the oxidation of evaporated zinc vapor in the air. It was found that theparticles range from 70 to 100nm in average particle size. The effect of experimentalparameters was investigated, the increase of the air flow-rates reduced the averageparticle size, while increasing the evaporation temperature and the amount of metalcharged increased the average particle size. TEM of the particles collected showedthat the crystal habits of particles have a tetrapod-like of wurtzite structure consists offour needle crystals. It was found by electron diffraction that all particles were singlecrystal.A.A.A. Saleh, X.J. Zhai, Y.C. Zhai and Y. FuSchool of Materials and Metallurgy, Northeastern University, Shenyang 110004, China 2002Acta Metallurgica Sinica(English Letters)2002,15,6:3
17Effect of Alstonia scholaris bark extract on testicular function of Wistar rats显示文摘Aim:To evaluate the antifertility effect of Alstonia scholaris bark extract in male rats.Methods:In male Wistar rats Alstonia scholaris bark extract was given by oral route at a dose of 200mg/day for60days,The fertility and testicular function were assessed by mating tests,sperm motility,sperm concentration,biochemical indices and testicular cell population dynamics.Results:Oral feeding with the extract at a dose of 200mg/day for the period of 60days did not cause body weight loss,while the weights of testes,epididymides,seminal vesicle and ventral prostate were significantly reduced.The production of step-19 spermatids was reduced by 79.6%in treated rats.The popu-lation of preleptotene and pachytene spermatocytes were decrased by61.9%and60.1%,respectively.Spematogo-nia and Sertoli cell population were also affected.The seminiferous tubule and Leydig cell nuclear area were reduced significantly(P<0.01)when compared to the controls..Reduced sperm count and motility yesulted in a total supprs-sion of fertility.A significant fall in the protein and sialic acid content of the testes,epididymides,seminal vesicle and ventral prostate as well as glycogen content of testes were also noticed.The fructose content in the seminal vesicle was lowered whereas the testicular cholesterol was elevated as compared with the controls.The following com-pounds were obtained from the extract with chromatographic separation over Si-gel column;α-amyrin,β-amyrin,lupiol acetate,venenative,rhazine and yohimbine,Conclusion:At the dose level employed,Alstonia scholaris bark extract has a significant antifertility effect in male rast;the primary site of action may be post meiotic germ cells(Step19spermatids).R. S. Gupta Rakhi Sharma Aruna Sharma A.K. Bhatnager M.P. Dobhal Y.C. Joshi M.C. Sharma 2002Asian Journal of Andrology2002,4,3:3
18Safety and radiation-enhancing effect of sodium glycididazole in locoregionally advanced laryngeal cancers previously treated with platinum-containing chemotherapy regimens: A preliminary report显示文摘Y.C. Zeng R. Wu Z.G. Xu X.Y. Zhang G.L. Fan L.N. Wu Y.M. Wang S.H. Hao W. Zheng X.D. Chen F. Chi Z.Y. Zhang X. Li X.Y. Jin W. Chen S.L. Wang F.D. Xiao E.Y. Wang X.Q. Dong L.B. Zhang M.X. Jia H.H.X. Xia H.B. Zhang Y. Li 2009Cancer / Radiothérapie2009,,1:2
19Worsening renal function in heart failure: The need for a consensus definition显示文摘Noella J. Sheerin Phillip J. Newton Peter S. Macdonald Dominic Y.C. Leung David Sibbritt Stephen Timothy Spicer Kay Johnson Henry Krum Patricia M. Davidson 2014International Journal of Cardiology2014,,:2
20Experimental study of structural fire behaviour of steel beam to concrete filled tubular column assemblies with different types of joints显示文摘J. Ding Y.C. Wang 2007Engineering Structures2007,,12:2
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