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| 1 | Convex shaping process simulation during counter-rotating electrochemical machining by using the finite element method显示文摘In counter-rotating electrochemical machining(CRECM), a revolving cathode tool with hollow windows of various shapes is used to fabricate convex structures on a revolving part. During this process, the anode workpiece and the cathode tool rotate relative to each other at the same rotation speed. In contrast to the conventional schemes of ECM machining with linear motion of a block tool electrode, this scheme of ECM is unique, and has not been adequately studied yet. In this paper, the finite element method(FEM) is used to simulate the anode shaping process during CRECM, and the simulation process which involves a meshing model, a moving boundary,and a simulation algorithm is described. The simulated anode profiles of the convex structure at different processing times show that the CRECM process can be used to fabricate convex structures of various shapes with different heights. Besides, the variation of the inter-electrode gap indicates that this process can also reach a relative equilibrium state like that in conventional ECM. A rectangular convex and a circular convex are successfully fabricated on revolving parts. The experimental results indicate relatively good agreement with the simulation results. The proposed simulation process is valid for convex shaping prediction and feasibility studies as well. | Wang Dengyong Zhu Zengwei Wang Hongrui Zhu Di | 2016 | Chinese Journal of Aeronautics2016，29，2： | 8 |
| 2 | Effects of Shielding Coatings on the Anode Shaping Process during Counter-rotating Electrochemical Machining显示文摘Electrochemical machining(ECM) has been widely used in the aerospace, automotive, defense and medical industries for its many advantages over traditional machining methods. However, the machining accuracy in ECM is to a great extent limited by the stray corrosion of the unwanted material removal. Many attempts have been made to improve the ECM accuracy, such as the use of a pulse power, passivating electrolytes and auxiliary electrodes. However, they are sometimes insufficient for the reduction of the stray removal and have their limitations in many cases. To solve the stray corrosion problem in CRECM, insulating and conductive coatings are respectively used. The different implement processes of the two kinds of coatings are introduced. The effects of the two kinds of shielding coatings on the anode shaping process are investigated. Numerical simulations and experiments are conducted for the comparison of the two coatings. The simulation and experimental results show that both the two kinds of coatings are valid for the reduction of stray corrosion on the top surface of the convex structure. However, for insulating coating, the convex sidewall becomes concave when the height of the convex structure is over 1.26 mm. In addition, it is easy to peel off by the high-speed electrolyte. In contrast, the conductive coating has a strong adhesion, and can be well reserved during the whole machining process. The convex structure fabricated by using a conductive iron coating layer presents a favorable sidewall profile. It is concluded that the conductive coating is more effective for the improvement of the machining quality in CRECM. The proposed shielding coatings can also be employed to reduce the stray corrosion in other schemes of ECM. | WANG Dengyong ZHU Zengwei WANG Ningfeng ZHU Di | 2016 | Chinese Journal of Mechanical Engineering2016，29，5： | 6 |
| 3 | Effect of Lactobacillus salivarius H strain isolated from Chinese dry-cured ham on the color stability of fresh pork显示文摘The aim of this research is to investigate the effect of lactic acid bacteria(LAB)on color stability of fresh pork.Of the seven LAB strains isolated from the Chinese dry-cured hams,H strain was identified as Lactobacillus salivarius(CCTCC M2010374)by serial biochemical tests and 16S rRNA analysis.The fresh pork samples were immersed in the H strain and Lactobacillus fermentum extracts for 1 min after ultrasonic cells disruption and samples immersed in sterile 0.9%(m/V)saline was served as a control group,then samples were vacuum packaged and stored at 4◦C.Nitrate oxide synthase(NOS)and metmyoglobin(MetMb)reductase were found in the cells extracts of H strain.After 6 days of storage,H strain group was found to be associated with the highest CIE a*values(P<0.05)and the lowest MetMb(41%).L.salivarius H strain has thus shown a beneficial effect on the color stability of fresh pork.Further research is necessary to elucidate its mechanism.©2013 Beijing Academy of Food Sciences.Production and hosting by Elsevier B.V.All rights reserved. | Zhen Luo Vincent Gasasira Yuhui Huang Dengyong Liu Xihong Yang Shihong Jiang Wenfeng Hu | 2013 | Food Science and Human Wellness2013，2，3： | 3 |
| 4 | Investigation of anode shaping process during co-rotating electrochemical machining of convex structure on inner surface显示文摘A novel co-rotating electrochemical machining method is proposed for fabricating convex structures on the inner surface of a revolving part.The electrodes motion and material removal method of co-rotating electrochemical machining are different from traditional electrochemical machining.An equivalent kinematic model is established to analyze the novel electrodes motion,since the anode and cathode rotate in the same direction while the cathode simultaneously feeds along the line of centres.According to the kinematic equations of the electrodes and Faraday’s law,a material removal model is established to simulate the evolution of the anode profile in co-rotating electrochemical machining.The simulation results indicate that the machining accuracy of the convex structure is strongly affected by the angular velocity ratio and the radius of the cathode tool.An increase of the angular velocity ratio can improve the machining accuracy of a convex structure.A small difference in the radius of the cathode tool will cause changes in the shape of the sidewalls of the convex structure.The width of the cathode window affects only the width of the convex structure and the inclination a of the sidewall.A relation between the width of the cathode window and the width of the convex structure was obtained.The formation process for a convex structure under electrochemical dissolution was revealed.Based on the simulation results,the optimal angular velocity ratio and cathode radius were selected for an experimental verification,and 12 convex structures were simultaneously fabricated on the inner surface of a thin-walled revolving part.The experimental results are in good agreement with the simulation results,which verifies the correctness of the theoretical analysis.Therefore,inner surface co-rotating electrochemical machining is an effective method for fabricating convex structures on the inner surface of a revolving part. | Shuofang ZHOU Dengyong WANG Wenjian CAO Di ZHU | 2023 | Chinese Journal of Aeronautics2023，36，7： | 2 |
| 5 | 显示文摘 | XIANGLing WUBei DENGYong(向玲 吴贝 邓勇) | | 华西药学杂志0，，： | 1 |
| 6 | Anodic dissolution mechanism of TA15 titanium alloy during counter-rotating electrochemical machining显示文摘Counter-rotating electrochemical machining(CRECM)is a novel shaping method with advantages in processing revolving parts,especially engine casings.However,few researchers have studied the anodic behaviour of the counter-rotating state.This paper aims to analyse the anode dissolution behaviour of TA15 and obtain desired surface qualities in CRECM.The anodic characteristics were measured by polarization and cyclic voltammetry curves,and the passive-trans passive behaviour of TA15 was revealed.The electrode surface structures at different stages were analysed using electrochemical impedance spectroscopy(EIS),and a quantitative dissolution model was established to illustrate the electrochemical dissolution and structural evolution of the revolving surfaces.A series of CRECM experiments were conducted,and three stages(pitting corrosion,pitting expansion,and smoothing)were detected according to the current signals.In the first stage,an oxide film with small pores was formed initially on the metal surface when exposed to air.This air-formed oxide film was broken down locally during the electrochemical reaction process,resulting in the occurrence of pitting.With the increase of electricity,the oxide layer became thinner,and the pitting areas expanded and began to connect with each other.In this stage,the surface quality was poor owing to the uneven material dissolution.When the amount of electricity approximately reached a constant,the oxide layer was completely removed,and a very thin salt film was generated at the metal-electrolyte interface.In this stage,the material was dissolved uniformly,and the surface was smooth without pitting corrosion.Based on the obtained results,anode workpieces with grid-like convex structures were fabricated using CRECM.Both the revolving surface and the sidewalls of the convex structures can be controlled from pitting to smoothness. | CAO WenJian WANG DengYong CUI GuoWei ZHU Di | 2022 | Science China(Technological Sciences)2022，65，6： | 1 |
| 7 | Empirical Comparisons of Deep Learning Networks on Liver Segmentation显示文摘Accurate segmentation of CT images of liver tumors is an important adjunct for the liver diagnosis and treatment of liver diseases.In recent years,due to the great improvement of hard device,many deep learning based methods have been proposed for automatic liver segmentation.Among them,there are the plain neural network headed by FCN and the residual neural network headed by Resnet,both of which have many variations.They have achieved certain achievements in medical image segmentation.In this paper,we firstly select five representative structures,i.e.,FCN,U-Net,Segnet,Resnet and Densenet,to investigate their performance on liver segmentation.Since original Resnet and Densenet could not perform image segmentation directly,we make some adjustments for them to perform live segmentation.Our experimental results show that Densenet performs the best on liver segmentation,followed by Resnet.Both perform much better than Segnet,U-Net,and FCN.Among Segnet,U-Net,and FCN,U-Net performs the best,followed by Segnet.FCN performs the worst. | Yi Shen Victor S.Sheng Lei Wang Jie Duan Xuefeng Xi Dengyong Zhang Ziming Cui | 2020 | Computers, Materials & Continua2020，，3： | 1 |
| 8 | Meat quality and cooking attributes of thawed pork with different low field NMR T21显示文摘 | LI Chunbao LIU Dengyong ZHOU Guanghong | 2011 | Meat Science2011，92，2： | 1 |
| 9 | Auxin signaling module OsSK41-OsIAA10-OsARF regulates grain yield traits in rice显示文摘Auxin is an important phytohormone in plants, and auxin signaling pathways in rice play key roles in regulating its growth, development, and productivity. To investigate how rice grain yield traits are regulated by auxin signaling pathways and to facilitate their application in rice improvement, we validated the functional relationships among regulatory genes such as OsIAA10, OsSK41, and OsARF21 that are involved in one of the auxin(OsIAA10) signaling pathways. We assessed the phenotypic effects of these genes on several grain yield traits across two environments using knockout and/or overexpression transgenic lines.Based on the results, we constructed a model that showed how grain yield traits were regulated by OsIAA10 and OsTIR1, OsAFB2, and OsSK41 and OsmiR393 in the OsSK41-OsIAA10-OsARF module and by OsARF21 in the transcriptional regulation of downstream auxin response genes in the OsSK41-OsIAA10-OsARF module. The population genomic analyses revealed rich genetic diversity and the presence of major functional alleles at most of these loci in rice populations. The strong differentiation of many major alleles between Xian/indica and Geng/japonica subspecies and/or among modern varieties and landraces suggested that they contributed to improved productivity during evolution and breeding. We identified several important aspects associated with the genetic and molecular bases of rice grain and yield traits that were regulated by auxin signaling pathways.We also suggested rice auxin response factor(OsARF) activators as candidate target genes for improving specific target traits by overexpression and/or editing subspecies-specific alleles and by searching and pyramiding the ‘best' gene allelic combinations at multiple regulatory genes in auxin signaling pathways in rice breeding programs. | Fuying Ma Fan Zhang Yu Zhu Dengyong Lan Peiwen Yan Ying Wang Zejun Hu Xinwei Zhang Jian Hu Fuan Niu Mingyu Liu Shicong He Jinhao Cui Xinyu Yuan Ying Yan Shujun Wu Liming Cao Hongwu Bian Jinshui Yang Zhikang Li Xiaojin Luo | 2023 | Journal of Integrative Plant Biology2023，65，7： | 1 |
| 10 | Meat quality and cooking attributes of thawed pork with different low field NMR T2j 显示文摘 | Li Chunbao Liu Dengyong Zhou Guanghong | 2012 | Meat Science2012，92，2： | 1 |
| 11 | Meat quality and cooking attributes of thawed pork with different low field NMR T 21显示文摘 | Chunbao Li Dengyong Liu Guanghong Zhou Xinglian Xu Jun Qi Peilei Shi Tianlan Xia | 2011 | Meat Science2011，，2： | 1 |
| 12 | Analysis and control of inter-electrode gap during leveling process in counter-rotating electrochemical machining显示文摘The inter-electrode gap(IEG) is an essential parameter for the anode shaping process in electrochemical machining(ECM) and directly affects the machining accuracy. In this paper, the IEG during the leveling process of an oval anode workpiece in counter-rotating ECM(CRECM)is investigated. The variation of the minimum IEG is analyzed theoretically, and the results indicate that rather than reaching equilibrium, the minimum IEG in CRECM expands constantly when a constant feed speed is used for the cathode tool. This IEG expansion leads to a poor localization effect and has an adverse influence on the roundness of the machined workpiece. To maintain a small constant IEG in CRECM, a variable feed speed is used for the cathode based on a fitted equation. The theoretical results show that the minimum IEG can be controlled at a small value by using an accelerated feed speed. Experiments have been conducted using a specific experimental apparatus in which the cathode tool is designed as a combined structure of two sectors and a thin sheet. By detecting the machining currents flowing through the minimum IEG, how the latter varies is obtained indirectly. The results indicate that using an accelerated feed speed is effective for controlling the IEG, thereby improving the roundness of the machined workpiece. | Dengyong WANG Jinzheng LI Bin HE Di ZHU | 2019 | Chinese Journal of Aeronautics2019，32，11： | 1 |
| 13 | On evolutionary spectral clustering显示文摘 | Chi Yun Song Xiaodan Zhou Dengyong | 2009 | ACM Trans on Knowledge Discovery from Data2009，3，4： | 1 |
| 14 | Semi-supervised Graph-based Hyperspectral Image Classification显示文摘 | CAMPS-VALLS G BANDOS T V ZHOU Dengyong | | IEEE Transactions on Geoscience and Remote Sensing0，45，10： | 1 |
| 15 | Ranking on data manifolds显示文摘 | ZHOU Dengyong Weston J Gretton A | 2004 | Advances in Neural Information Processing Systems2004，16，1： | 1 |
| 16 | Learning with local and global consistency显示文摘 | ZHOU Dengyong Bousquet O Lal T N | 2004 | Advances in Neural Information Processing Systems2004，16，16： | 1 |
| 17 | Tilted Fiber Bragg Grating in Graded-Index Multimode Fiber and Its Sensing Characteristics显示文摘 | Dengyong LI Yuan GONG Yu WU | 2013 | Photonic Sensors2013，3，2： | 1 |
| 18 | Ranking on data manifolds显示文摘 | Zhou Dengyong Jason W Arthur G | 2003 | Advances in Neural Information Pro- cessing Systems2003，，16： | 1 |
| 19 | Semi-supervised learning on directed graphs显示文摘 | Zhou Dengyong Scholkopf B Hofmann T | 2005 | Advances in Neural Information Processing System2005，17，： | 1 |
| 20 | Adsorption of p-nitrophenol from aqueous solutions onto activated carbon fiber 显示文摘 | Tang Dengyong Zheng Zheng Lin Kui Luan Jingfei Zhang Jibiao | 2007 | Journal of Hazardous Materials2007，143，12： | 1 |
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