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| 1 | Mechanical assisted electroless barrel-plating Ni-P coatings on magnesium alloy显示文摘A mechanically assisted electroless barrel-plating Ni-P was carried out in a rolling drum containing Mg alloy specimens and ceramic balls, which was submerged in a bath containing electroless plating solution. It is demonstrated that the Ni-P coatings deposited by this novel technique have a crystallized Ni-P solid solution structure, showing fine-grains, higher hardness, and higher corrosion resistance compared with the conventional electroless plated amorphous Ni-P coatings. After heat treatment at 400 ℃ for 1 h, the structure of such Ni-P coatings were transformed to a structure with Ni-Ni3P double phases, and cracks in these coatings could not be observed, whereas cracks appeared seriously in the conventional electroless plated Ni-P coating after same heat treatment. Therefore, both hardness and corrosion resistance of these Ni-P coatings can be improved further by heat treatment. All of these beneficial effects can be attributed to the role of mechanical attrition during the mechanically assisted electroless barrel-plating process. | Zhaoxia PING Juntao YUAN Yedong HE Xiaogang LI | 2009 | Acta Metallurgica Sinica(English Letters)2009，22，3： | 6 |
| 2 | FORM ERROR EVALUATION OF CIRCLES BASED ON A FINELY-DESIGNED GENETIC ALGORITHM显示文摘A genetic algorithm(GA)-based new method is designed to evaluate the circularity error of mechanical parts.The method uses the capability of nonlinear optimization of GA to search for the optimal solution of circularity error.The finely-designed GA (FDGA) characterized dynamical bisexual recombination and Gaussian mutation.The mathematical model of the nonlinear problem is given.The implementation details in FDGA are described such as the crossover or recombination mechanism which utilized a bisexual reproduction scheme and the elitist reservation method; and the adaptive mutation which used the Gaussian probability distribution to determine the values of the offspring produced by mutation mechanism.The examples are provided to verify the designed FDGA.The computation results indicate that the FDGA works very well in the field of form error evaluation such as circularity evaluation. | CuiChangcai CheRensheng LiZhongyan YeDong | 2004 | Chinese Journal of Mechanical Engineering2004，17，1： | 5 |
| 3 | Mechanically Assisted Electroless Barrel-plating Ni-P Coatings Deposited on Carbon Steel显示文摘A mechanically assisted electroless (MAE) barrel-plating technique has been developed to deposit Ni-P coatings on carbon steel.The mechanical treatment was carried out in a rolling drum containing carbon steel specimens and glass balls of 2-3 mm diameter,which was submerged in a bath containing electroless plating solution.The coatings are Ni-polycrystalline and have a fine grained structure and smooth surfaces.The hardness and corrosion resistance of the novel coatings are considerably improved compared with the conventional electroless (CE)-plated Ni-P coatings,which are amorphous.After heat treatment at 400 C for one hour,cracks and pores are observed in the CE-plated Ni-P coating,while no cracks appear in the MAE barrel-plated Ni-P coating.The improved properties of the MAE barrel-plated Ni-P coatings demonstrate the advantages of this novel technique,wide applications of which will be found in industries. | Zhaoxia Ping Cuoan Cheng Yedong He | 2010 | Journal of Materials Science & Technology2010，26，10： | 4 |
| 4 | BUNDLE ADJUSTMENTS CCD CAMERA CALIBRATION BASED ON COLLI NEARITY EQUATION显示文摘The solid template CCD camera calibration method of bundle adjustments based on collinearity equation is presented considering the characteristics of space large-dimension on-line measurement. In the method, a more comprehensive camera model is adopted which is based on the pinhole model extended with distortions corrections. In the process of calibration, calibration precision is improved by imaging at different locations in the whole measurement space, multi-imaging at the same location and bundle adjustments optimization. The calibration experiment proves that the calibration method is able to fulfill calibration requirement of CCD camera applied to vision measurement. | LiuChangying YuZhijing CheRensheng YeDong HuangQingcheng YangDingning | 2004 | Chinese Journal of Mechanical Engineering2004，17，4： | 3 |
| 5 | Enhancing the mechanical and anticorrosion properties of 316L stainless steel via a cathodic plasma electrolytic nitriding treatment with added PEG显示文摘A cathodic plasma electrolytic nitriding(CPEN)treatment with a urea aqueous solution was performed on 316L stainless steel to rapidly improve its surface properties in this work.Test results show that the PEG2000 macromolecules increased the nitriding energy via enhancing the ability to bond the produced gas film to the metal/electrolyte interface.The cross-sectional morphologies indicate that a thick nitrided layer was obtained when the urea concentration was 543 g I^-1,corresponding to a Vickers hardness 450 HV(0.1),which was 3.5 times larger than that of the substrate.The nitrided layer mainly contained expanded austenite(γN),oxides and iron nitrides(e.g.,Fe3O4 and FeN(0.076)).In terms of its performance,coefficient of friction(COF)of the nitride layer decreased to nearly two-thirds that of the untreated layer,and the passivation current densities of the nitrided sample in a 3.5%NaCl solution decreased by an order of magnitude compared to that of the substrate.Therefore,the approach presented herein provides an attractive way to modify the effect of CPEN in a urea aqueous solution. | Tianyi Zhang Junsheng Wu Lei Jin Zhan Zhang Wan Rong Bowei Zhang Yi Wang Yedong He Wei Liu Xiaogang Li | 2019 | Journal of Materials Science & Technology2019，35，11： | 3 |
| 6 | Surface Microstructure and High Temperature Oxidation Resistance of Thermal Sprayed NiCoCrAlY Bond-Coat Modified by Cathode Plasma Electrolysis显示文摘The surface properties of the air-plasma sprayed bond-coat have been modified by cathode plasma electrolysis(CPE). After modification, a re-melted layer without obvious pores and oxide stringers is formed,the gain size of re-melted layer is approximately 80–120 nm. It is shown, from cyclic oxidation at 1100℃,that a thin oxide scale mainly composed of α-Al_2O_3 has been formed on the modified bond-coat and the oxidation resistance of the modified bond-coat has been significantly improved. Such beneficial result can be attributed to following effects: during CPE process, the plasma discharges with high temperature take place on the bond-coat surface. With plasma discharge treatment, the surface is melted and quickly re-solidified, the grain size decreases, and the pores and oxide stringers disappear. During cyclic oxidation, owing to the above modification of surface properties, the critical content of Al for selective oxidation is significantly decreased. Therefore, a continuous Al_2O_3 scale is formed. | Shunjie Deng Peng Wang Yedong He Jin Zhang | 2017 | Journal of Materials Science & Technology2017，33，9： | 3 |
| 7 | Real-time monitoring of optimum timing for harvesting fresh tea leaves based on machine vision显示文摘The harvesting time of fresh tea leaves has a significant impact on product yield and quality.The aim of this study was to propose a method for real-time monitoring of the optimum harvesting time for picking fresh tea leaves based on machine vision.Firstly,the shapes of fresh tea leaves were distinguished from RGB images of the tea-tree canopy after graying with the improved B-G algorithm,filtering with a median filter algorithm,binary processing with the Otsu algorithm,and noise reduction and edge smoothing using open and close operations.Then the leaf characteristics,such as leaf area index,average length,and leaf identification index,were calculated.Based on these,the Bayesian discriminant principle and method were used to construct a discriminant model for fresh tea-leaf collection status.When this method was applied to a RGB tea-tree canopy image acquired at 45°shooting angle,the fresh tea-leaf recognition rate was 90.3%,and the accuracy for fresh tea-leaf harvesting status was 98%by cross validation.Hence,this method provides the basic conditions for future tea-plantation operation and management using information technology,automation,and intelligent systems. | Liang Zhang Hongduo Zhang Yedong Chen Sihui Dai Xumeng Li Kenji Imou Zhonghua Liu Ming Li | 2019 | International Journal of Agricultural and Biological Engineering2019，12，1： | 2 |
| 8 | Sequential activation of uterine epithelial IGF1R by stromal IGF1 and embryonic IGF2 directs normal uterine preparation for embryo implantation显示文摘Embryo implantation in both humans and rodents is initiated by the attachment of a blastocyst to the uterine epithelium.For blastocyst attachment,the uterine epithelium needs to transform at both the structural and molecular levels first,and then initiate the interaction with trophectoderm.Any perturbation during this process will result in implantation failure or long-term adverse pregnancy outcomes.Endocrine steroid hormones,which function through nuclear receptors,combine with the local molecules produced by the uteri or embryo to facilitate implantation.The insulin-like growth factor(IGF)signaling has been reported to play a vital role during pregnancy.However,its physiological function during implantation remains elusive.This study revealed that mice with conditional deletion of Igflr gene in uteri suffered from subfertility,mainly due to the disturbed uterine receptivity and abnormal embryo implantation.Mechanistically,we uncovered that in response to the nidatory estrogen on D4 of pregnancy,the epithelial IGF1R,stimulated by the stromal cell-produced IGF1,facilitated epithelial STAT3 activation to modulate the epithelial depolarity.Furthermore,embryonic derived IGF2 could activate both the epithelial ERK1/2 and STAT3 signaling through IGF1R,which was critical for the transcription of Cox2 and normal attachment reaction.In brief,our data revealed that epithelial IGF1R was sequentially activated by the uterine stromal IGF1 and embryonic IGF2 to guarantee normal epithelium differentiation during the implantation process. | Chan Zhou Meiying Lv Peike Wang Chuanhui Guo Zhangli Ni Haili Bao Yedong Tang Han Cai Jinhua Lu Wenbo Deng Xiaoyu Yang Guoliang Xia Haibin Wang Chao Wang Shuangbo Kong | 2021 | Journal of Molecular Cell Biology2021，13，9： | 2 |
| 9 | Ni-P-SiC composite coatings electroplated on carbon steel assisted by mechanical attrition显示文摘Ni-P-SiC composite coatings were electroplated on carbon steel substrate assisted by mechanical attrition(MA).The MA action was conducted by dispersing glass balls on the cathodic surface,vibrating in the horizontal direction.The experimental results show that,under the assistant of MA action,the adhesion of Ni-P-SiC coating on the steel substrate can be improved effectively,and the Ni-P-SiC coatings exhibit a crystallized structure and Ni-P matrix can combine tightly with SiC particles,and the hardness and corrosion resistance of these coatings increase markedly.During heat treatment,the defects produced in conventional Ni-P-SiC composite coatings can be avoided assisted by MA action.Both of the wear resistance and corrosion resistance of these coatings can be improved further. | Zhaoxia PING Guoan CHENG Yedong HE | 2010 | Acta Metallurgica Sinica(English Letters)2010，23，2： | 2 |
| 10 | Preparation and high-temperature properties of Au nano-particles doped α-Al 2 O 3 composite coating on TiAl-based alloy显示文摘 | Xiaoxu Ma Yedong He Deren Wang | 2011 | Applied Surface Science2011，，23： | 1 |
| 11 | Low-temperature processing of Fe-Al intermetallic coatings assisted by ball milling显示文摘 | Zhan Zhaolin He Yedong Wang Deren | 2006 | Intermetallics2006，14，1： | 1 |
| 12 | The effect of thin surface applied oxide coating films on the selective oxidation of alloys显示文摘 | He Yedong Stott F | 1996 | Corrosion Science1996，38，11： | 1 |
| 13 | Al2O3-Y2O3 ceramic coatings produced by cathodic micra-arc electrodeposition and their high temperature oxidation resistance显示文摘 | Li Liangjian He Yedong Wang Deren | 2005 | High Temperature Materials and Processes2005，24，1： | 1 |
| 14 | Corrosion resistance of Zn-Al co-cementation coatings on carbon steels显示文摘 | He Yedong Li Dezhi Wang Deren | 2002 | Materials Letters2002，56，： | 1 |
| 15 | Corrosion-erosion resistance of Zn-Al co-cementation coatings on carbon steels in aqueous media显示文摘 | Li Dezhi He Yedong Wang Deren | 2002 | Trans Nonferrous Met Soc China12002，3，： | 1 |
| 16 | Fabrication and high temperature oxidation resistance of ZrO 2 /Al 2 O 3 micro-laminated coatings on stainless steel显示文摘 | Junguo Gao Yedong He Deren Wang | 2010 | Materials Chemistry and Physics2010，，： | 1 |
| 17 | nano-/nano composite ceramic coatings prepared by thermal pressure filtration of sol-gel paints显示文摘 | HE Yedong Zhang Kun LI Liangjian | 2006 | International Journal of Modern Physics B2006，20，： | 1 |
| 18 | COMPARISON,SYMMETRY AND MONOTONICITY RESULTS FOR SOME DEGENERATE ELLIPTIC OPERATORS IN CARNOT-CARATHEODORY SPACES显示文摘This paper studies the properties of solutions of quasilinear equations involving the p-laplacian type operator in general Carnot-Carath6odory spaces. The authors show some com-parison results for solutions of the relevant differential inequalities and use them to get some symmetry and monotonicity properties of solutions, in bounded or unbounded domains. | GEYUXIN YEDONG ZHOUFENG | 2002 | Chinese Annals of Mathematics,Series B2002，23，3： | 1 |
| 19 | The Effect of Thin Surface-applied Oxide Coating Filmson the Selective Oxidation of Alloys显示文摘 | HE Yedong STOTT F H | 1996 | Corrosion Science1996，38，11： | 1 |
| 20 | 显示文摘 | KONGDe-Nian(孔德年) FENGMei-Ling(冯美玲) YEDong(叶冬) etal | | JiegouHuaxue0，，： | 1 |
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