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Layout design of a mixed-flow production line based on processing energy consumption and buffer configuration

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Advances in Manufacturing 2021年第3期9卷 369-387页

作者： Cai-Xia Zhang Shu-Lin Dong Hong-Yan Chu guo-zhi ding zhi-Feng Liu Shi-Yao guo Chong-Bin Yang Institute of Advanced Manufacturing and Intelligent Technology Beijing University of TechnologyBeijing100124People’s Republic of China Beijing Key Laboratory of Advanced Manufacturing Technology Beijing University of TechnologyBeijing100124People’s Republic of China Beijing Xinghang Electromechanical Equipment Co. Ltd.Beijing100074People’s Republic of China School of Mechanical Engineering and Automation Beihang UniversityBeijing100191People’s Republic of China

Green manufacturing is a growing trend,and an effective layout design method for production lines can reduce resource wastage in *** study focuses on existing problems such as low equipment utilization,long standby time,and low logistics efficiency in a mixed-flow parallel production *** reduce the energy consumption,a novel method considering an independent buffer configuration and idle energy consumption analysis is proposed for this production line’s layout design.A logistics intensity model and a machine tool availability model are established to investigate the influences of independent buffer area configuration on the logistics intensity and machine tool *** solve the coupling problem between machine tools in such production lines,a decoupling strategy for the relationship between machine tool processing rates is *** energy consumption model for the machine tools,based on an optimized configuration of independent buffers,is *** model can effectively reduce the idle energy consumption of the machine tools while designing the workshop ***,considering the problems encountered in workshop production,a comprehensive optimization model for the mixed-flow production line is *** verify the effectiveness of the mathematical model,it is applied to an aviation cabin production *** results indicate that it can effectively solve the layout problem of mixed-flow parallel production lines and reduce the idle energy consumption of machine tools during *** proposed buffer configuration and layout design method can serve as a theoretical and practical reference for the layout design of mixed-flow parallel production lines.

关键词： Layout design Energy consumption Mixed flow production line Independent buffer configuration

Numerical simulation on a film-cooled rotating model with 30° injection holes

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航空动力学报 2010年第7期25卷 1443-1453页

作者： YANG Bin XU guo-qiang TAO zhi ding Shui-ting WU Hong-wei National Key Laboratory of Science and Technology on Aero-Engines School of Jet Propulsion Beijing University of Aeronautics and Astronautics Beijing 100191 China

The flow and heat transfer characteristics were numerically investigated on a film cooling model under different rotating operating *** computational model was originated from the mid-span section of a typical turbine rotor with two rows of 14 staggered injection holes angled 30° both on the suction surface and pressure surface,and the flow through the coolant plenum and all the hole-pipes were resolved as a part of the computational domain by specifying the coolant mass flux in the *** computations primarily focus on under-standing the rotational effect on film cooling performance in mechanism research *** the present study,the Reynolds number(Re) based on mainstream velocity and injection hole diameter varied from 1835.5 to 5507.4,and the averaged blowing ratio(M) ranges of 0.5 to *** show that the coolant will move on to the high-radius locations near the suction and pressure surfaces due to the strong centrifugal effect,which leads to the decrease in adiabatic effectiveness *** discharge coefficients(Cd),on the pressure surface,are much higher than that on the suction surface under a given operating *** addition,the critical values of angular speed which represent the equilibrium of centrifugal force and Coriolis force near the pressure surface are also presented.

关键词： film cooling rotating adiabatic effectiveness heat transfer discharge coefficient

A new digital pulse processing method for 2πa and 2πb emitter measurement

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Nuclear Science and Techniques 2016年第6期27卷 137-143页

作者： Zheng Tu Ke-Zhu Song Ming Zhang zhi-Jie Yang zhi-guo ding Hong-Wei Yu Jun-Cheng Liang Hao-Ran Liu State Key Laboratory of Particle Detection and Electronics University of Science and Technology of ChinaHefei 230026China National Institute of Metrology 18 North Third Ring EastRd.Beijing 100029China

Digital pulse processing has developed rapidly during recent ***,it has been widely applied in many *** this study,we introduce a digital pulse processing method for 2πa and 2πb emitter *** digital pulse processing method for 2πa and 2πb emitter measurement is comprised of a field-programmable gate-array-based acquisition card and a pulse-height analysis *** established two channels(one for the a emitter and one for the b emitter) on an acquisition board using an analog-to-digital converter with a 16-bit resolution at a speed of 100 million samples per *** this study,we used captured and stored data to analyze emission rate counts and *** method we established takes into account noise cancelation,dead-time correction,background subtraction,and zero-energy *** carefully designed control procedures in order to simplify pulse-width fitting and threshold-level *** transmitted data and commands through a universal serial bus between the acquisition board and the *** results of our tests prove that our method performs well in pulse reconstruction fidelity and amplitude measurement *** with the current standard method for measuring 2πa and 2πb emission rates,our system demonstrates excellent precision in emission rate counting.

关键词：脉冲处理测量性能发射器顺序控制程序 π 数据采集卡测量精度模数转换器

Role of intelligent/interactive qualitative and quantitative analysisthree-dimensional estimated model in donor-recipient size mismatch following deceased donor liver transplantation

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World Journal of Gastroenterology 2023年第44期29卷 5894-5906页

作者： Han ding zhi-guo ding Wen-Jing Xiao Xu-Nan Mao Qi Wang Yi-Chi Zhang Hao Cai Wei Gong Department of Transplantation Xinhua HospitalAffiliated to Shanghai Jiaotong University School of MedicineShanghai 200092China Department of General Surgery The Third People’s Hospital of YangzhouYangzhou 225126Jiangsu ProvinceChina Department of Tuberculosis Control Shanghai Municipal Center for Disease Control and PreventionShanghai 200336China Department of Biliary-Pancreatic Surgery Shanghai Changzheng HospitalSecond Military Medical UniversityShanghai 200003China Department of Pathology First Affiliated Hospital of Nanjing Medical UniversityNanjing 210029JiangsuChina Department of General Surgery Xinhua HospitalAffiliated to Shanghai Jiaotong University School of MedicineShanghai 200092China Shanghai Key Laboratory of Biliary Tract Disease Research Shanghai200092China

BACKGROUND Donor-recipient size mismatch(DRSM)is considered a crucial factor for poor outcomes in liver transplantation(LT)because of complications,such as massive intraoperative blood loss(IBL)and early allograft dysfunction(EAD).Liver volumetry is performed routinely in living donor LT,but rarely in deceased donor LT(DDLT),which amplifies the adverse effects of DRSM in *** to the various shortcomings of traditional manual liver volumetry and formula methods,a feasible model based on intelligent/interactive qualitative and quantitative analysis-three-dimensional(IQQA-3D)for estimating the degree of DRSM is *** To identify benefits of IQQA-3D liver volumetry in DDLT and establish an estimation model to guide perioperative *** We retrospectively determined the accuracy of IQQA-3D liver volumetry for standard total liver volume(TLV)(sTLV)and established an estimation TLV(eTLV)index(eTLVi)*** operating characteristic(ROC)curves were drawn to detect the optimal cut-off values for predicting massive IBL and EAD in DDLT using donor sTLV to recipient sTLV(called sTLVi).The factors influencing the occurrence of massive IBL and EAD were explored through logistic regression ***,the eTLVi model was compared with the sTLVi model through the ROC curve for *** A total of 133 patients were included in the *** Changzheng formula was accurate for calculating donor sTLV(P=0.083)but not for recipient sTLV(P=0.036).Recipient eTLV calculated using IQQA-3D highly matched with recipient sTLV(P=0.221).Alcoholic liver disease,gastrointestinal bleeding,and sTLVi>1.24 were independent risk factors for massive IBL,and drug-induced liver failure was an independent protective factor for massive *** donor-female recipient combination,model for end-stage liver disease score,sTLVi≤0.85,and sTLVi≥1.32 were independent risk factors for EAD,and viral hepatitis was an independent protective factor for *** overall surv

关键词： Intelligent/interactive qualitative and quantitative analysis-three-dimensional Donor-recipient size mismatch Intraoperative blood loss Early allograft dysfunction

Source localization in signed networks with effective distance

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Chinese Physics B 2024年第2期33卷 577-585页

作者：马志伟孙蕾丁智国黄宜真胡兆龙 Zhejiang Normal University School of Computer Science and TechnologyJinhua 321004China Shanghai Business School School of Business and EconomicsShanghai 200235China Jinhua Polytechnic School of Information EngineeringJinhua 321016China

While progress has been made in information source localization,it has overlooked the prevalent friend and adversarial relationships in social *** paper addresses this gap by focusing on source localization in signed network *** the topological characteristics of signed networks and transforming the propagation probability into effective distance,we propose an optimization method for observer ***,by using the reverse propagation algorithm we present a method for information source localization in signed *** experimental results demonstrate that a higher proportion of positive edges within signed networks contributes to more favorable source localization,and the higher the ratio of propagation rates between positive and negative edges,the more accurate the source localization ***,this aligns with our observation that,in reality,the number of friends tends to be greater than the number of adversaries,and the likelihood of information propagation among friends is often higher than among *** addition,the source located at the periphery of the network is not easy to ***,our proposed observer selection method based on effective distance achieves higher operational efficiency and exhibits higher accuracy in information source localization,compared with three strategies for observer selection based on the classical full-order neighbor coverage.

关键词： complex networks signed networks source localization effective distance

Embracing non-orthogonal multiple access in future wireless networks

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Frontiers of Information Technology & Electronic Engineering 2018年第3期19卷 322-339页

作者： zhi-guo ding Mai XU Yan CHEN Mu-gen PENG H.Vincent POOR Department of Electrical Engineering Princeton University School of Electrical and Electronic Engineering the University of Manchester School of Electronic and Information Engineering Beihang University Huawei Technologies Co. Ltd. Institute of Telecommunications Beijing University of Posts and Telecommunications

This paper provides a comprehensive survey of the impact of the emerging communication technique, non-orthogonal multiple access （NOMA）, on future wireless networks. Particularly, how the NOMA principle affects the design of the generation multiple access techniques is introduced first. Then the applications of NOMA to other advanced communication techniques, such as wireless caching, multiple-input multiple-output techniques, millimeter-wave communications, and cooperative relaying, are discussed. The impact of NOMA on communication systems beyond cellular networks is also illustrated, through the examples of digital TV, satellite communications, vehicular networks, and visible light communications. Finally, the study is concluded with a discussion of important research challenges and promising future directions in NOMA.

关键词： Non-orthogonal multiple access(NOMA) Wireless caching Multiple-input multiple-output(MIMO)NOMA Cooperative NOMA Millimeter-wave networks Visible light communications(VLC)

Rock fracture mechanism of buffer blasting with cushion layer at the borehole bottom

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International Journal of Minerals,Metallurgy and Materials 2025年第2期32卷 325-334页

作者： Xinguang Zhu Chenxi ding Zhe Sui Hong Su Xu guo School of Civil and Resources Engineering University of Science and Technology BeijingBeijing 100083China Key Laboratory for Mechanics in Fluid Solid Coupling Systems Institute of MechanicsChinese Academy of SciencesBeijing 100190China School of Mechanics and Civil Engineering China University of Mining and Technology(Beijing)Beijing 100083China School of Chemical and Blasting Engineering Anhui University of Science and TechnologyHuainan 232001China

This study primarily investigates the rock fracture mechanism of bottom cushion layer blasting and explores the effects of the bottom cushion layer on rock *** involves analyses of the evolution patterns of blasting stress,characteristics of crack distribution,and rock fracture features in the ***,blasting model experiments were carried out using the dynamic caustics principle to investigate the influence of bottom cushion layers and initiation methods on the integrity of the bottom rock *** experimental results indicate that the combined use of bottom cushion layers and inverse initiation effectively protects the integrity of the bottom rock ***,the process of stress wave propagation and dynamic crack propagation in rocks was simulated using the continuum-discontinuum element method(CDEM)and the Landau explosion source model,with varying thicknesses of bottom cushion *** numerical simulation results indicate that with increasing cushion thickness,the absorption of energy generated by the explosion becomes more pronounced,resulting in fewer cracks in the bottom rock *** illustrates the positive role of the cushion layer in protecting the integrity of the bottom rock mass.

关键词： bottom cushion layer blasting crack propagation continuum-discontinuum element method dynamic stress intensity factor

Study of Gas-jet Flow Rate and KBr oven Temperature Effect on Gas-jet Transport Yield

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近代物理研究所和兰州重离子加速器实验室年报：英文版 2007年第1期 56-57页

作者： Lin Maosheng Qin zhi guo Junsheng ding Huajie Bai Jing Zhang Lina Lei Fuan Fan Fangli Wu Xiaolei Li Xiaofei

Gas Phase Chromatography Experiment with Bromides of Niobium and Tantalum

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近代物理研究所和兰州重离子加速器实验室年报：英文版 2009年第1期 69-70页

作者： Lin Maosheng Lei Fuan Qin zhi guo Junsheng ding Huajie Bai Jing Zhang Lina Fan Fangli Wu Xiaolei Li Xiaofei