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| 1 | An integrated turbocharger design approach to improve engine performance显示文摘Turbocharging technology is today considered as a promising way for internal combustion engine energy saving and CO2 reduction.Turbocharger design is a major challenge for turbocharged engine performance improvement.The turbocharger designer must draw upon the information of engine operation conditions,and an appropriate link between the engine requirements and design features must be carefully developed to generate the most suitable design recommendation.The objective of this research is to develop a turbocharger design approach for better turbocharger matching to an internal combustion engine.The development of the approach is based on the concept of turbocharger design and interaction links between engine cycle requirements and design parameter values.A turbocharger through flow model is then used to generate the design alternatives.This integrated method has been applied with success to a gasoline engine turbocharger assembly. | ZHANG YangJun1,CHEN Tao1,ZHUGE WeiLin1,ZHANG ShuYong2 & XU JianZhong3 1 State Key Laboratory of Automotive Safety and Energy,Tsinghua University,Beijing 100084,China 2 National Key Laboratory of Diesel Engine Turbocharging Technology,P.O.B.22,Datong 037036,China 3 Institute of Engineering Thermophysics,Chinese Academy of Sciences,Beijing 100190,China | 2010 | Science China(Technological Sciences)2010，53，1： | 8 |
| 2 | Effect of microstructure on the mechanical and corrosion behaviors of a hot-extruded nickel aluminum bronze显示文摘In this paper,the influence of microstructure on the corrosion behavior of a hotextruded nickel aluminum bronze was studied.Three kinds of samples subjected to the hot-extrusion,annealing and quenching conditions were prepared and immersion tests in 3.5% NaCl solution were carried out.Microstructures and corrosion surface morphologies of the samples were observed by SEM.It was found that the retained β martensite and(α+κⅢ) lamella eutectoid in the as hot-extruded material were eliminated after annealing,and corrosion resistance of the alloy was improved.As to the as-quenched material,its corrosion rate was higher than that of the as hotextruded material since the volume fraction of β phase which was anodic to α phase increased after quenching.As regards the mechanical properties,the as-quenched sample possesses the highest hardness and tensile strength among the three kinds of samples,while the as-annealed sample possesses the highest elongation.That is to say,heat treatment plays different roles in the mechanical properties and corrosion resistance of the experimental alloy. | Datong ZHANG Ruiping CHEN Weiwen ZHANG Zongqiang LUO Yuanyuan LI | 2010 | Acta Metallurgica Sinica(English Letters)2010，23，2： | 5 |
| 3 | Text detection and recognition in images and video frames显示文摘 | Datong Chen Jean-Marc Odobez Herve Bourlard | 2004 | Pattern Recognition2004，37，： | 1 |
| 4 | Superplastic tensile behavior of a finegrained AZ91 magnesium alloy prepared by fricti- on stir processing 显示文摘 | Zhang Datong Wang Saixiang Qiu Chen | 2012 | Mater Sci Eng A2012，，556： | 1 |
| 5 | Microstructure evolution of AZ31 magnesium alloy during equal channel angular extrusion 显示文摘 | Li Yuanyuan Zhang Datong Chen Weiping | 2004 | Journal of Materials Science2004，39，11： | 1 |
| 6 | Text detection and recognition in images and video frames 显示文摘 | Chen Datong Jean - Marc O Herve B | 2004 | Pattern Recognition2004，37，3： | 1 |
| 7 | 显示文摘 | Chen Zhan Wang Jiaxu Qing Datong | 2001 | Lubrication Enginering2001，，4： | 1 |
| 8 | Effects of Gear Manufacturing Error on the Dy-namic Characteristics of Planetary Gear Trans-mission System of Wind Turbine 显示文摘 | Chen Huitao Wu Xiaoling Qin Datong | 2011 | AppliedMechanics and Material2011，86，： | 1 |
| 9 | Mixed-ba- sis superposition method for the perturbation analysis of eigensolutions显示文摘 | Han Wanzhi Song Datong Chen Suhuan | 1996 | Communications in Numerical Methods in Engineering1996，12，： | 1 |
| 10 | Text detection and recognition in images and video frames显示文摘 | Chen Datong Odobez Jean-Marc Bourlard Herve | 2004 | Pattern Recogni- tion2004，37，3： | 1 |
| 11 | Text Detection and Recognition in Images and Video Frames显示文摘 | CHEN Datong ODOBEZ Jeanmarc BOURLARD Herve | 2004 | Journal of Pattern Recognition2004，37，3： | 1 |
| 12 | Text detection and recognition in images and video frames显示文摘 | Chen Datong Odobez Jean-Mare Bourlard Herve | 2004 | Pattern Recognition2004，3，： | 1 |
| 13 | SYNTHESIS OF NANOPOROUS SILICA WITH INTERIOR COMPOSITE CELLS WITH SYNTHETIC BLOCK COPOLYPEPTIDE AS TEMPLATE显示文摘Nanoporous silica with unusual interior composite cells was synthesized with synthetic block copolypeptide Phe20-b-PBLG50 as template for the first time. Anilino-methyl triethoxy silane (AMTS) was used as an intermedium to interact with block co-polypeptide Phe20-b-PBLG50 through π-π interaction between the phenyl groups of block copolypeptide and those of AMTS. Meanwhile, AMTS co-condenses together with tetraethoxylsilane (TEOS) after hy-drolysis. The structure of composite vesicles due to the self-assembly of block copolypeptide in the or-ganic solvent was immobilized and transcribed by the formation of silica. The formation of nanopores could be ascribed to the secondary structure of block co-polypeptide and small molecular amine. Our results provide a new avenue to synthesize porous oxide materials with novel interior structures templated by the copolypeptide self-assembly under ambient con-ditions. | LIU Yuping ZHOU Huijing SHEN Zhurui LI Liying ZHOU Xingdi SUN Pingchuan YUAN Zhongyong CHEN Tiehong LI Baohui DING Datong | 2006 | Chinese Science Bulletin2006，51，4： | 0 |
| 14 | THE WASSERSTEIN-FISHER-RAO METRIC FOR WAVEFORM BASED EARTHQUAKE LOCATION显示文摘In this paper,we apply the Wasserstein-Fisher-Rao(WFR)metric from the unbalanced optimal transport theory to the earthquake location problem.Compared with the quadratic Wasserstein(W2)metric from the classical optimal transport theory,the advantage of this method is that it retains the important amplitude information as a new constraint,which avoids the problem of the degeneration of the optimization objective function near the real earthquake hypocenter and origin time.As a result,the deviation of the global minimum of the optimization objective function based on the WFR metric from the true solution can be much smaller than the results based on the W2 metric when there exists strong data noise.Thus,we develop an accurate earthquake location method under strong data noise.Many numerical experiments verify our conclusions. | Datong Zhou Jing Chen Hao Wu Dinghui Yang Lingyun Qiu | 2023 | Journal of Computational Mathematics2023，41，3： | 0 |
| 15 | Morphological evolution and kinetic enhancement of Li_2Fe_xMn_(1-x)SiO_4/C cathodes for Li-ion battery显示文摘Li_2MnSiO_4-based cathode materials possess reasonable work potentials and high theoretical capacities,while the practical energy/power densities are constrained by their inferior kinetics of Li^+ diffusion.In this work,the Pmn2_1-structure Li_2Fe_xMn_(1-x)SiO_4/C materials were synthesized via a solvothermal method and evaluated as Liion cathode materials,with notable morphological evolutions and tunable crystallographic habits observed after solvothermal process.The Li_2Fe_(0.33)Mn_(0.67)SiO_4/C material delivers an initial reversible capacity of 250.2mAh g^(-1)at 0.1 C(~1.51 Li^+insertion/extraction,1 C=166 mA g^(-1)),excellent high-rate capability(52.2 mAh g^(-1)at 5 C),and good long-term cyclability(64.6%after 196 cycles at 2 C).The enhanced electrochemical properties are attributed to the boosted ion/electron transports induced by preferred morphological and structural characteristics of Li_2Fe_(0.33)Mn_(0.67)SiO_4/C. | Datong Zhang Zhengping Ding Shuai Zhao Ying Yang Yiming Feng Lei Xiao Ran Ji Libao Chen Weifeng Wei | 2018 | Progress in Natural Science:Materials International2018，28，5： | 0 |
| 16 | OSCILLATION THEOREMS FOR SECOND ORDER NEUTRAL DIFFERENCE EQUATIONS显示文摘The aim of this paper is to study the oscillation of second order neutral difference equations.Our results are based on the new comparison theorems,that reduce the problem of the oscillation of the second order equation to that of the first order equation.The comparison principles obtained essentially simplify the examination of the equations. | Jianmin Guo,Huiqin Chen,Shugui Kang(School of Math.and Computer Sciences,Shanxi Datong University,Datong 037008,Shanxi) | 2012 | Annals of Differential Equations2012，28，3： | 0 |
| 17 | Synthesis of an N^5N^(10)-methenyltetrahydrofolate Model and Its Substituted One-Carbon Unit Transfer Reaction显示文摘SynthesisofanN~5N^(10)-methenyltetrahydrofolateModelandItsSubstitutedOne-CarbonUnit TransferReactionSynthesisofanN~5N^(10)-meth... | Jian Xin CHEN Chi Zhong XIA and Jin Pei CHENG(Datong Medical College,Datong,Shanxi,037008)(Department of Chemistry,Shanxi University,Taiyuan, 030006.)(Nankai University,Tianjin,300071) | 1996 | Chinese Chemical Letters1996，7，9： | 0 |
| 18 | Achieving Superior Superplasticity in a Mg-6Al-Zn Plate via Multi-pass Submerged Friction Stir Processing显示文摘A large-scale Mg-6Al-Zn plate was prepared by multi-pass submerged friction stir processing(M-SFSP)and its superplastic deformation behavior was investigated.The maximum elongation of 467%,332%and 421%was attained for the samples oriented in the processing direction(PD),45°tilted toward the PD,and transverse direction(TD),respectively,when deformed at 623 K and a strain rate of 1×10^(−3) s^(−1).This was attributed to the homogeneous and fine-grained structure with mostly high-angle grain boundaries facilitating the prevalent deformation mechanism of grain boundary sliding,along with the weakened texture and dynamic recrystallization during hot deformation. | Xicai Luo Haolin Liu Limei Kang Jielin Lin Datong Zhang Dongyang Li Daolun Chen | 2022 | Acta Metallurgica Sinica(English Letters)2022，35，5： | 0 |
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