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Study on the Elasticity-Plasticity-Stickiness of the Railway Crushed Stone Ballast

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上海交通大学学报 2004年第z2期38卷 67-72页

作者： gao liang School of Civil Engineering and Architecture Beijing Jiaotong University Beijing100044 China

This paper is mainly aimed at the mechanics characteristic elas of ticity-plasticitystickiness existed in the CWR (continuously welded rails) track plane of the railway crushed stone ballast. As an important mechanics parameter of the CWR track plane, the ballast resistance is mainly influenced by this mechanics characteristic. Through the systematic experimental research and the theoretical analysis, this mechanics characteristic of the ballast resistance is revealed and a reasonable theoretical model is built for it. This study set a sound foundation for further studying the CWR track deformation property. It will be beneficial to the development of high-speed railway in China.

关键词： elasticity-plasticity-stickiness crushed stone ballast constitutive model CWR track

A Comprehensive Review of Isogeometric Topology Optimization:Methods,Applications and Prospects

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Chinese Journal of Mechanical Engineering 2020年第6期33卷 24-37页

作者： Jie gao Mi Xiao Yan Zhang liang gao Department of Engineering Mechanics School of Aerospace EngineeringHuazhong University of Science and TechnologyWuhan430074China Hubei Key Laboratory for Engineering Structural Analysis and Safety Assessment Huazhong University of Science and TechnologyWuhan430074China The State Key Lab of Digital Manufacturing Equipment and Technology Huazhong University of Science and TechnologyWuhan430074China School of Machinery and Automation Wuhan University of Science and TechnologyWuhan430081China

Topology Optimization(TO)is a powerful numerical technique to determine the optimal material layout in a design domain,which has accepted considerable developments in recent *** classic Finite Element Method(FEM)is applied to compute the unknown structural responses in ***,several numerical deficiencies of the FEM significantly influence the effectiveness and efficiency of *** order to eliminate the negative influence of the FEM on TO,IsoGeometric Analysis(IGA)has become a promising alternative due to its unique feature that the Computer-Aided Design(CAD)model and Computer-Aided Engineering(CAE)model can be unified into a same mathematical *** the paper,the main intention is to provide a comprehensive overview for the developments of Isogeometric Topology Optimization(ITO)in methods and ***,some prospects for the developments of ITO in the future are also presented.

关键词： Topology optimization Isogeometric analysis CAD CAE

Anomalies in Special Permutation Flow Shop Scheduling Problems

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Chinese Journal of Mechanical Engineering 2020年第3期33卷 53-59页

作者： Lin Gui liang gao Xinyu Li State Key Laboratory of Digital Manufacturing Equipment and Technology Huazhong University of Science and TechnologyWuhan 430074China

Recent researches show that there are some anomalies,which are not satisfied with common sense,appearing in some special permutation flow shop scheduling problems(PFSPs).These anomalies can be divided into three different types,such as changing the processing time of some operations,changing the number of total jobs and changing the number of total *** paper summarizes these three types of anomalies showing in the special PFSPs and gives some examples to make them better *** extended critical path is proposed and the reason why these anomalies happen in special PFSPs is given:anomalies will occur in these special PFSPs when the time of the operations on the reverse critical path *** that,the further reason for these anomalies is presented that when any one of these three types of anomalies happens,the original constraint in the special PFSPs is destroyed,which makes the anomalies ***,the application of these anomalies in production practice is given through examples and also with the possible research *** main contribution of this research is analyzing the intial reason why the anomalies appear in special PFSPs and pointing out the application and the possible research directions of all these three types of anomalies.

关键词： Scheduling Permutation flow shop Anomaly

A Discrete Multi‑Objective Artificial Bee Colony Algorithm for a Real‑World Electronic Device Testing Machine Allocation Problem

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Chinese Journal of Mechanical Engineering 2022年第6期35卷 136-150页

作者： Jin Xie Xinyu Li liang gao State Key Laboratory of Digital Manufacturing Equipment and Technology Huazhong University of Science and TechnologyWuhan 430074China

With the continuous development of science and technology,electronic devices have begun to enter all aspects of human life,becoming increasingly closely related to human *** have higher quality requirements for electronic *** device testing has gradually become an irreplaceable engineering process in modern manufacturing enterprises to guarantee the quality of products while preventing inferior products from entering the *** the large output of electronic devices,improving the testing efficiency while reducing the testing cost has become an urgent problem to be *** study investigates the electronic device testing machine allocation problem(EDTMAP),aiming to improve the production of electronic devices and reduce the scheduling distance among testing machines through reasonable machine ***,a mathematical model was formulated for the EDTMAP to maximize both production and the scheduling distance among testing ***,we developed a discrete multi-objective artificial bee colony(DMOABC)algorithm to solve EDTMAP.A crossover operator and local search operator were designed to improve the exploration and exploitation of the algorithm,*** experiments were conducted to evaluate the performance of the proposed *** experimental results demonstrate the superiority of the proposed algorithm compared with the non-dominated sorting genetic algorithm II(NSGA-II)and strength Pareto evolutionary algorithm 2(SPEA2).Finally,the mathematical model and DMOABC algorithm were applied to a real-world factory that tests radio-frequency *** results verify that our method can significantly improve production and reduce the scheduling distance among testing machines.

关键词： Electronic device Machine allocation Multi-objective optimization Artificial bee colony algorithm

Discrete Artificial Bee Colony Algorithm for Lot-streaming Flowshop with Total Flowtime Minimization

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Chinese Journal of Mechanical Engineering 2012年第5期25卷 990-1000页

作者： SANG Hongyan gao liang PAN Quanke State Key Lab. of Digital Manufacturing Equipment & Technology Huazhong University of Science and Technology Wuhan 430074 China School of Mathematics Science Liaocheng University Liaocheng 252059 China School of Computer Science Liaocheng University Liaocheng 252059 China

Unlike a traditional flowshop problem where a job is assumed to be indivisible, in the lot-streaming flowshop problem, a job is allowed to overlap its operations between successive machines by splitting it into a number of smaller sub-lots and moving the completed portion of the sub-lots to downstream machine. In this way, the production is accelerated. This paper presents a discrete artificial bee colony （DABC） algorithm for a lot-streaming flowshop scheduling problem with total flowtime criterion. Unlike the basic ABC algorithm, the proposed DABC algorithm represents a solution as a discrete job permutation. An efficient initialization scheme based on the extended Nawaz-Enscore-Ham heuristic is utilized to produce an initial population with a certain level of quality and diversity. Employed and onlooker bees generate new solutions in their neighborhood, whereas scout bees generate new solutions by performing insert operator and swap operator to the best solution found so far. Moreover, a simple but effective local search is embedded in the algorithm to enhance local exploitation capability. A comparative experiment is carried out with the existing discrete particle swarm optimization, hybrid genetic algorithm, threshold accepting, simulated annealing and ant colony optimization algorithms based on a total of 160 randomly generated instances. The experimental results show that the proposed DABC algorithm is quite effective for the lot-streaming flowshop with total flowtime criterion in terms of searching quality, robustness and effectiveness. This research provides the references to the optimization research on lot-streaming flowshop.

关键词： lot-streaming flowshop scheduling artificial bee colony algorithm total flowtime

Bio-inspired peptide-Au cluster applied for mercury(II) ions detection

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Science China Chemistry 2015年第5期58卷 819-824页

作者： Yaling Wang Yanyan Cui Ru Liu Fuping gao liang gao Xueyun gao Key Laboratory for Biomedical Effects of Nanomaterials and Nanosafety Institute of High Energy Physics Chinese Academy of Sciences College of Materials Science and Opto-electronic Technology University of Chinese Academy of Sciences

Mercury ion （Hg2＋） pollution exists in water, soil, and food. By interacting with the thiol groups in protein, Hg2＋ ions can ac- cumulate in ways that cause serious damage to the central nervous system and threaten human health and natural environment. Undoubtedly, Hg2＋ ion detection is a significant issue in environment and health monitoring. A variety of sensor platforms for Hg2＋ ion detection based on organic molecules, DNA, oligonucleotides, inorganic materials, etc, have been reported. In this paper, an artificial peptide PHg, with a cluster bio-mineralize sequence （CCY） and a multi-charge hydrophilic sequence is de- signed as a template for the one-step synthesis of a peptide-Au cluster probe. Briefly： the peptide PHg in situ anchors Au ions to form a peptide-Au （I） intermediate and the reaction pH with NaOH is adjusted; alter 12 h incubation at room temperature, the peptide PGg-Au nanocluster probe with red fluorescence is obtained. The probe has a super-small core size of approximately 1.26 nm and a maximum emission peak at 650 rim. The presence of Hg2＋ ions cause the fluorescence of the probe to greatly decrease. Based on the differences in fluorescence intensity of the PHg-Au nanocluster in the absence and presence of Hg2＋ ions, Hg2＋ ions could be quantitatively detected in concentrations ranging from 5 nmol/L to 1 lamol/L. The limit of detection （LOD） is 7.5 nmol/L. Compared with some interference ions such as, K＋, Mg2＋, Ca2＋, Pb2＋, Ni2＋, Fe3＋, and Cue＋, the selectivity was excellent. The sensing of Hg2＋ ion is not affected by the chelate agents： EDTA, which imparts a significant advantage in a range of applications. As a result, a simple, sensitive and oped for the detection of Hg2＋ ions. selective fluorescent assay based on peptide PHg-Au cluster is devel-

关键词： peptide-Au cluster mercury (Ⅱ) ions fluorescence detection

Car capacity near bus stops with mixed traffic derived by additive-conflict-flows procedure

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Science China(Technological Sciences) 2011年第3期54卷 733-740页

作者： YANG XiaoBao gao ZiYou SI BingFeng gao liang MOE Key Laboratory for Urban Transportation Complex Systems Theory and Technology Beijing Jiaotong University Beijing 100044 China

To determinate car capacity at bus stops with mixed traffic, a new theoretical approach was developed on the basis of additive-conflict-flows procedure. The procedure was extended from homogeneous traffic flow to mixed traffic flow. The conflicts among cars, buses and bicycles near the stop can be described by the extended procedure. The procedure can be understood more easily than the theory of gap acceptance. Car capacity near the stop is the function of both bus stream and bicycle stream. The proposed model can also analyze the cases of pedestrian effects and limited priority of bicyclists. Numerical results show that the car capacity decreases with the increasing flow rates of other streams. In addition, pedestrian effects and bicyclist's limited priority have negative effects on car capacity near bus stops with mixed traffic flow.

关键词： road capacity bus stop additive-conflict-flows procedure mixed traffic flow

Water and other volatiles on Mars

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National Science Review 2024年第6期11卷 12-14页

作者： Sen Hu Yubing gao Zhan Zhou liang gao Yangting Lin Key Laboratory of the Earth and Planetary Physics Institute of Geology and GeophysicsChinese Academy of Sciences College of Earth and Planetary Sciences University of Chinese Academy of Sciences

Mars, the intriguing red planet, is one of the planets most similar to the Earth in our solar system. It is widely accepted that Mars could have had a warm and wet climate in its early history supported by numerous lines of evidence, e.g. topography, canyons, outflow channels, presence of phyllosilicates and evaporative salts,sedimentary formation, and many others (e.g.[1]), and thus Mars is believed to once have a potentially habitable environment which could be able to supply fundamental conditions for the evolution of potential lives.

关键词： mars water other volatiles

A Novel MILP Model Based on the Topology of a Network Graph for Process Planning in an Intelligent Manufacturing System

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Engineering 2021年第6期7卷 807-817页

作者： Qihao Liu Xinyu Li liang gao State Key Laboratory of Digital Manufacturing Equipment and Technology School of Mechanical Science and EngineeringHuazhong University of Science and TechnologyWuhan 430074China

Intelligent process planning(PP)is one of the most important components in an intelligent manufacturing system and acts as a bridge between product designing and practical *** is a nondeterministic polynomial-time(NP)-hard problem and,as existing mathematical models are not formulated in linear forms,they cannot be solved well to achieve exact solutions for PP *** paper proposes a novel mixed-integer linear programming(MILP)mathematical model by considering the network topology structure and the OR nodes that represent a type of OR logic inside the *** relationships between operations are discussed by raising three types of precedence relationship ***,the proposed model can be programmed in commonly-used mathematical programming solvers,such as CPLEX,Gurobi,and so forth,to search for optimal solutions for most open *** verify the effectiveness and generality of the proposed model,five groups of numerical experiments are conducted on well-known *** results show that the proposed model can solve PP problems effectively and can obtain better solutions than those obtained by the state-ofthe-art algorithms.

关键词： Process planning Network Mixed-integer linear programming CPLEX