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Scheduling Reclaimer Operations in the Stockyard to Minimize Makespan

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Acta Mathematicae Applicatae Sinica 2018年第3期34卷 597-609页

作者： Chao WANG xi-wen lu René SITTERS East China University of Science and Technology 200237 Shanghai China VU University Amsterdam De Boelelaan 1105 1081 HV Amsterdam The Netherlands

This paper considers a reclaimer scheduling problem in which one has to collect bulk material from stockpiles in the quay in such a way that the time used is minimized. When reclaimers are allowed to work on the same stockpile simultaneously, a fully polynomial time approximation scheme（FPTAS） is designed. Further,we present a 2-approximation algorithm in the case that any stockpile can be handled by only one reclaimer at a time. When the number of reclaimers is two, we give a 3/2-approximation algorithm. Numerical experiments show that the algorithms perform much better than our worst case analysis guarantees.

关键词： scheduling approximation algorithm performance ratio numerical simulation

Two-Agent Supply Chain Scheduling Problem to Minimize the Sum of the Total Weighted Completion Time and Batch Cost

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Journal of the Operations Research Society of China 2017年第2期5卷 257-269页

作者： Li-Ya Yang xi-wen lu Department of Mathematics East China University of Science and TechnologyShanghai 200237China

Two-agent single-machine scheduling problem is considered in this *** A’s goal is to minimize the sum of the total weighted delivery time and the total delivery cost,and agent B has the delivery time ***,the NP-hardness of the general problem is proved,and then two special cases are *** case is that A’s jobs have agreeable ratio and this problem is still NP-hard.A pseudo-polynomial dynamic programming algorithm and a 32-approximation algorithm are *** the other case,A’s jobs have agreeable ratio and B’s jobs have deadline at the same *** problem is polynomial solvable.

关键词： Two-agent Supply chain scheduling Algorithm

Dynamical complexity of Anosov systems driven by a quasi-periodic force

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Science China Mathematics 2025年第1期 89-136页

作者： wen Huang Zeng Lian Kening lu Department of Mathematics University of Science and Technology of China School of Mathematics Sichuan University

Consider C2Anosov systems on a compact manifold driven by a quasi-periodic *** study their dynamical complexity on various levels from the perspectives of both path-wise dynamics and stochastic *** that these systems are non-wandering（i.e.,every point in the phase space is nonwandering）,we prove a set of results:（1） the existence of abundance of random periodic points;（2） a random Liv?ic theorem;（3） a random Ma?é-Bousch-Conze-Guivarc'h lemma;（4） the existence of strong random ***,a concrete example constructed on a 2-dimensional torus is also given to uncover some interesting phenomena of the systems.

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Metal-organic frameworks with dinuclear metal centers for synergistically boosting CO2 photoreduction

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Science China Chemistry 2025年第01期 201-208页

作者： Hui-Feng Wang wen-Jie Shi Yu-xin Yang Bao-xia Dong Tong-Bu lu Di-Chang Zhong School of Chemistry and Chemical Engineering Yangzhou University Institute for New Energy Materials and Low Carbon Technologies School of Materials Science and Engineering Tianjin University of Technology

Dinuclear metal synergistic catalysis （DMSC） has been proved powerful in boosting CO2reduction,while this has not been achieved in heterogeneous catalysts with long-range order *** this study,we,by introduction of metal catalytic centers into an indium-based metal-organic framework （MOF）,obtained a series of isostructural In-MOFs,including three MOFs with mononuclear metal catalytic center （M-In）,three MOFs with dinuclear homometallic catalytic centers （MM-In）,and three MOFs with dinuclear heterometallic catalytic centers (MM’-In,M/M’=Co（II）,Ni（II）,Zn（II）).It was found that all these MOFs can serve as catalysts for photochemical CO2reduction to *** with M-In,the catalytic activities of MM-In were obviously enhanced,and that of MM’-In was further significantly *** example,the CO yield of Co Zn-In reaches a record value of 12,700μmol g-1h-1,which is 4.0,8.1,9.4,and 18.6-fold higher than that of Co Co-In,Zn Zn-In,Co-In,and Zn-In,***,the catalytic activities of Co Ni-In and Ni Zn-In also show different fold increase than those of corresponding dinuclear homometallic and mononuclear metallic *** results of control experiments and theoretical calculation reveal that the higher catalytic activities of MM-In over M-In can be ascribed to the DMSC effect,and the higher catalytic activity of MM’-In over MM-In can be ascribed to the strengthened DMSC *** work reveals the relationship between DMSC effect and bimetal centers in CO2reduction,which provides new insights into the DMSC and paves a new way to design highly active catalysts for photochemical CO2reduction.

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《美国国家环境政策法》及其在气候诉讼中的适用

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甘肃警察职业学院学报 2016年第4期14卷 48-54页

作者：赵苏邓曦汶任陆平南京工业大学江苏南京210000

由于美国政府与国会在应对气候变化问题上持消极态度,人们将气候变化斗争的舞台转移到法庭,期望通过诉讼的形式推动政府和大型能源企业积极应对气候变化问题。相关诉讼大量出现,并逐渐形成一种特殊的诉讼类型,即气候变化诉讼。其中《国... 详细信息

由于美国政府与国会在应对气候变化问题上持消极态度,人们将气候变化斗争的舞台转移到法庭,期望通过诉讼的形式推动政府和大型能源企业积极应对气候变化问题。相关诉讼大量出现,并逐渐形成一种特殊的诉讼类型,即气候变化诉讼。其中《国家环境政策法》是气候变化诉讼中原告使用的最重要的法律武器之一。《国家环境政策法》中规定了与气候变化诉讼关系较为密切的环境影响评价制度。该制度要求联邦机构对于"显著影响人类生存环境质量的主要联邦行动,应编写详细的环境影响报告书(EIS)"。地球之友、绿色和平、博尔德市等诉美国进出口银行和美国海外私人投资公司案是与这一法律相关的典型案件。本文试对该法律文本与判例进行评析。

关键词：气候变化诉讼《国家环境政策法》环境影响评价

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转换大梁与剪力墙暗柱节点低周反复荷载试验

同济大学学报（自然科学版） 2004年第4期32卷 431-435页

作者：蒋欢军吕西林卢文胜同济大学结构工程与防灾研究所上海200092

对上海浦东香格里拉大酒店扩建工程中的转换大梁与剪力墙暗柱节点的1/8比例模型进行低周反复荷载试验,研究该节点的破坏机理、受力和变形特点、暗柱上的轴压力大小和转换大梁的纵筋在节点内的锚固长度对节点受力性能的影响;检验原节点... 详细信息

对上海浦东香格里拉大酒店扩建工程中的转换大梁与剪力墙暗柱节点的1/8比例模型进行低周反复荷载试验,研究该节点的破坏机理、受力和变形特点、暗柱上的轴压力大小和转换大梁的纵筋在节点内的锚固长度对节点受力性能的影响;检验原节点结构设计是否满足抗震要求;最后,根据模型试验的结果分析原型节点受力性能.

关键词：梁柱节点静力试验反复荷载

Parallel-batch scheduling with deterioration and rejection on a single machine

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Applied Mathematics(A Journal of Chinese Universities) 2020年第2期35卷 141-156页

作者： LI Da-wei lu xi-wen School of Science East China University of Science and TechnologyShanghai 200237China.

The single machine parallel-batch scheduling with deteriorating jobs and rejection is considered in this paper.A job is either rejected,in which a rejection penalty should be paid,or accepted and processed on the *** job’s processing time is an increasing linear function of its starting *** machine can process any number of jobs simultaneously as a *** processing time of a batch is equal to the largest processing time of the jobs in the *** objectives are to minimize the makespan and the total weighted completion time,respectively,under the condition that the total rejection penalty cannot exceed a given upper bound *** show that both problems are NP-complete and present dynamic programming algorithms and fully polynomial time approximation schemes(FPTASs)for the considered problems.

关键词： parallel-batch scheduling rejection deterioration FPTAS NP-complete

Ce(SO_4)_2-mediated Oxidative Coupling of Primary Aromatic Amines in Water

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Chemical Research in Chinese Universities 2009年第5期25卷 638-643页

作者： lu wen-chao xi Chan-juan Key Laboratory of Bioorganic Phosphorus Chemistry ＆ Chemical Biology Ministry of Education Department of Chemistry Tsinghua University Beo＇ing 100084 P. R. China

The oxidative coupling of primary aromatic amines was investigated. Ce（SO4）2 can mediate the oxidative coupling of primary aromatic amines in water to dimers, trimers and/or tetramers, which depended on the substituents of primary aromatic amines. When 2,6-dimethylaniline or 2,6-diethylaniline was used as substrate, dimer, and tetramer were formed as major products. When 2,6-diisopropylaniline or 2,6-dihaloanilines was used as substrate, dimer, and trimer were formed. The mechanistic aspect was also investigated.

关键词： Primary aromatic amine Oxidative coupling Cerium sulfate

An embedded electron current layer observed at the edge of the plasma sheet in the Earth’s magnetotail

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Earth and Planetary Physics 2025年第1期9卷 148-158页

作者： ChenChen Zhan RongSheng Wang QuanMing lu San lu xinMin Li Deep Space Exploration Laboratory/School of Earth and Space Sciences University of Science and Technology of ChinaHefei 230026China Chinese Academy of Sciences(CAS)Center for Excellence in Comparative Planetology/CAS Key Laboratory of Geospace Environment/Anhui Mengcheng National Geophysical Observatory University of Science and Technology of ChinaHefei 230026China Collaborative Innovation Center of Astronautical Science and Technology Harbin 150001China

The formation of an embedded electron current sheet within the magnetotail plasma sheet has been poorly *** this article,we present an electron current layer detected at the edge of the magnetotail plasma *** ions were demagnetized inside the electron current layer,but the electrons were still frozen in with the magnetic field ***,this decoupling of ions and electrons gave rise to a strong Hall electric field,which could be the reason for the formation of the embedded thin current *** magnetized electrons,the absence of the nongyrotropic electron distribution,and negligible energy dissipation in the layer indicate that magnetic reconnection had not been triggered within the embedded thin current *** highly asymmetric plasma on the two sides of the current layer and low magnetic shear across it could suppress magnetic *** observations indicate that the embedded electric current layer,probably generated by the Hall electric field,even down to electron scale,is not a sufficient condition for magnetic reconnection.

关键词： magnetotail plasma sheet magnetic reconnection