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Chinese Chemical Letters 2024年第7期35卷 491-496页

作者： Qian Wang Ting Gao xiwen lu Hangchao Wang Minggui Xu Longtao Ren Zheng Chang Wen Liu Institute of Science and Technology China Three Gorges CorporationBeijing 100038China State Key Laboratory of Chemical Resource Engineering Beijing Advanced Innovation Center for Soft Matter Science and EngineeringCollege of ChemistryBeijing University of Chemical TechnologyBeijing 100029China

All solid-state lithium metal batteries(ASSLMBs)based on polymer solid electrolyte and lithium metal anode have attracted much attention due to their high energy density and intrinsic ***,the low ionic conductivity at room temperature and poor mechanical properties of the solid polymer electrolyte result in increased polarization and poor cycling stability of the Li metal *** order to improve the ionic conductivity at room temperature while maintaining mechanical strength,we combine the conductivity of short chain polyethylene oxide(PEO)and strength of styrene-maleic anhydride copolymer(SMA)to obtain a grafted block copolymer with nanophase separation structure,which has room temperature ionic conductivity up to 1.14×10^(-4)S/cm and tensile strength up to 1.4 ***||Li symmetric cell can work stably for more than 1500 h under the condition of 0.1 mA/cm^(2).Li||LiFePO_(4)full cells can deliver a high capacity of 151.4 mAh/g at 25℃and 0.2 C/0.2 C charge/discharge conditions,showing 85.6%capacity retention after 400 ***,the all solid state Li||LiFePO_(4)pouch cell shows excellent safety performance under different abuse *** results demonstrate that the nanophase separated,grafted alternate copolymer electrolyte has huge potential for application in Li metal batteries.

关键词： Solid polymer electrolyte All solid-state battery Li metal battery Copolymers Nanophase separation

A Tight Approximation Algorithm for Multi-Vehicle CVRP with Unsplittable Demands on a Line

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Journal of Systems Science & Complexity 2022年第5期35卷 1902-1909页

作者： WU Yuanxiao lu xiwen School of Science East China University of Science and TechnologyShanghai 200237China

In this paper,the authors study the multi-vehicle capacitated vehicle routing problem on a line-shaped network with unsplittable *** objective is to find a transportation scheme to minimize the longest distance traveled by a single vehicle such that all the customers are served without violating the capacity *** authors show that this problem has no polynomialtime algorithm with performance ratio less than 2 on condition that P≠NP,and then provide a 2-approximation algorithm.

关键词： Approximation algorithm network unsplittable demand vehicle routing worst-case analysis

The Complexity and On-Line Algorithm for Automated Storage and Retrieval System with Stacker Cranes on One Rail

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Journal of Systems Science & Complexity 2016年第5期29卷 1302-1319页

作者： GAO Qiang lu xiwen Department of Mathematics East China University of Science and Technology

This paper considers an on-line scheduling and routing problem concerning the automated storage and retrieval system from tobacco industry. In this problem, stacker cranes run on one common rail between two racks. Multiple input/output-points are located at the bottom of the racks. The stacker cranes transport bins between the input/output-points and cells on the racks to complete requests generated over time. Each request should be accomplished within its response time. The objective is to minimize the time by which all the generated requests are completed. Under a given physical layout, the authors study the complexity of the problem and design on-line algorithms for both one-stacker-crane model and two-stacker-crane model. The algorithms axe validated by instances and numerical simulations.

关键词： Automated storage and retrieval system NPohard on-line algorithm routing scheduling.

GMSK iterative carrier recovery for AIS burst-mode

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The Journal of China Universities of Posts and Telecommunications 2017年第3期24卷 1-6页

作者： lu xiwen luo Yijun Li Jie School of Electronic Information Wuhan University Xi'an Institute of Space Radio Technology

In this paper, an iterative carrier recovery algorithm of Gaussian filtered minimum shift keying （GMSK） in burst-mode was designed. The data utilization rate and precision of the traditional demodulation method for recovering carrier signal in burst data packet with limited-length is poor. In order to solve this problem, this paper proposed an iterative carrier recovery algorithm. This algorithm can improve the estimated precision of carrier recovery and data utilization rate of burst data packet in a large extent by performing multiple forward and backward iterations. And the algorithm can be implemented in Simulink environment. As the communication mode of automatic identification system （AIS） is abrupt, the algorithm is especially suitable for satellite-based AIS.

关键词： kGMSK iteration cartier recovery AIS burst signal

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不同无土栽培模式与雪茄烟叶种植适配性研究

Rational design of nanoarray structures for lithium-sulfur batteries:recent advances and future prospects

中国科技纵横 2024年第10期 97-99页

作者：徐蕊卢溪文宋开慧张新于海洲山东临沂烟草有限公司沂水分公司山东沂水 276400 沂水县农业农村局山东沂水 276400

无土栽培是近年来在大农业生产上大范围应用的栽培模式.本研究将无土栽培模式引入雪茄种植环节,探索无土栽培模式和雪茄烟叶种植的适配性,为雪茄烟叶在山东地区的生产探索一种新的种植模式.试验表明,使用基质栽培模式烟株生长发育情况良... 详细信息

无土栽培是近年来在大农业生产上大范围应用的栽培模式.本研究将无土栽培模式引入雪茄种植环节,探索无土栽培模式和雪茄烟叶种植的适配性,为雪茄烟叶在山东地区的生产探索一种新的种植模式.试验表明,使用基质栽培模式烟株生长发育情况良好,更接近田间雪茄烟叶表现.

关键词：无土栽培雪茄烟根茎类病害

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Materials Futures 2023年第4期2卷 53-78页

作者： Longtao Ren Jun Liu Abdul Hameed Pato Yan Wang xiwen lu Imran Ali Chandio Mingyue Zhou Wen Liu Haijun Xu Xiaoming Sun College of Chemistry Beijing University of Chemical TechnologyBeijing 100029People’s Republic of China State Key Laboratory of Chemical Resource Engineering Beijing 100029People’s Republic of China Beijing Advanced Innovation Center for Soft Matter Science and Engineering Beijing 100029People’s Republic of China Beijing Key Laboratory of Green Chemical Reaction Engineering and Technology Department of Chemical EngineeringTsinghua UniversityBeijing 100084People’s Republic of China College of Mathematics and Physics Beijing University of Chemical TechnologyBeijing 100029People’s Republic of China

Lithium-sulfur(Li-S)batteries are considered as promising candidates for future-generation energy storage systems due to their prominent theoretical energy ***,their application is still hindered by several critical issues,e.g.,the low conductivity of sulfur species,the shuttling effects of soluble lithium polysulfides,volumetric expansion,sluggish redox kinetics,and uncontrollable Li dendritic *** research efforts have been devoted to breaking through the obstacles that are preventing Li-S batteries from realizing practical ***,benefiting from the no additives/binders,buffer of volume change,high sulfur loading and suppression of lithium dendrites,nanoarray(NA)structures have have emerged as efficient and durable electrodes in Li-S *** this work,recent advances in the design,synthesis and application of NA structures in Li-S batteries are ***,the multifunctional merits and typical synthetic strategies of employing NA structure electrodes for Li-S batteries are ***,the applications of NA structures in Li-S batteries are discussed ***,the challenge and rational design of NA structure for Li-S batteries are analyzed in depth,with the aim of providing promising orientations for the commercialization of high-energy-density Li-S batteries.

关键词： nanoarrays electrocatalysts surface and interface engineering lithium–sulfur batteries modulated strategies

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带有拒绝的单机和同型机排序问题

运筹学学报 2014年第4期18卷 1-10页

作者：高强鲁习文华东理工大学理学院数学系上海200237

研究了带有拒绝的单机和同型机排序问题.对于单机情形,工件的惩罚费用是对应加工时间的α倍.如果工件有到达时间,目标为最小化时间表长与惩罚费用之和,证明了这个问题是可解的.如果所有工件在零时刻到达,目标为最小化总完工时间与惩罚... 详细信息

研究了带有拒绝的单机和同型机排序问题.对于单机情形,工件的惩罚费用是对应加工时间的α倍.如果工件有到达时间,目标为最小化时间表长与惩罚费用之和,证明了这个问题是可解的.如果所有工件在零时刻到达,目标为最小化总完工时间与惩罚费用之和,也证明了该问题是可解的.对于同型机排序问题,研究了工件分两批在线实时到达的情形,目标为最小化时间表长与惩罚费用之和.针对机器台数2和m,分别给出了竞争比为2和4-2/m的在线算法.

关键词：排序可拒绝在线算法竞争比

工件带到达时间的两阶段柔性流水作业的近似算法

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运筹学学报 2007年第3期11卷 86-94页

作者：王辉鲁习文华东理工大学应用数学研究所上海200237

研究了工件带到时间的两阶段柔性流水作业的排序问题,基于求解流水作业和平行机问题的算法思想,提出两个相应的近似算法H(R)和H(MR(?)),证明了这两个算法的最坏情况性能比分别为3-1/m和2/5-1/m,讨论了界的紧性,并利用数值模拟以分析算... 详细信息

研究了工件带到时间的两阶段柔性流水作业的排序问题,基于求解流水作业和平行机问题的算法思想,提出两个相应的近似算法H(R)和H(MR(?)),证明了这两个算法的最坏情况性能比分别为3-1/m和2/5-1/m,讨论了界的紧性,并利用数值模拟以分析算法与最优值的近似性能比.

关键词：运筹学柔性流水作业到达时间时间表性能比

机器带不可用时间限制的简单线性恶化供应链排序问题

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运筹学学报 2016年第4期20卷 69-76页

作者：范静鲁习文上海工业大学文理学部上海201209 华东理工大学理学院上海200237

研究的单机供应链排序问题中,机器有一个不可用时间限制,工件的加工时间与恶化率及其开工时间有关,且工件的加工不可恢复.一个或多个完工工件可组成一个发送批由车辆发送给客户,且在机器不可用时间限制之前完工的工件必须在限制开始之... 详细信息

研究的单机供应链排序问题中,机器有一个不可用时间限制,工件的加工时间与恶化率及其开工时间有关,且工件的加工不可恢复.一个或多个完工工件可组成一个发送批由车辆发送给客户,且在机器不可用时间限制之前完工的工件必须在限制开始之时或之前完成发送.问题的目标是最小化总发送时间与总发送费用之和.证明问题是NP-难的,提出了伪多项式时间的动态规划算法.进一步,在确定问题目标函数值的上界及下界之后,设计了一个完全多项式时间近似方案(FPTAS).

关键词：简单线性恶化不可用时间限制供应链排序动态规划算法完全多项式时间近似方案

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带学习效应的两台平行机时间表长问题

运筹学学报 2018年第1期22卷 55-66页

作者：朱征露鲁习文华东理工大学理学院上海200237

研究机器带学习效应,目标函数为时间表长的两台平行机排序问题,问题是NP-难的.首先建立了求解该问题最优解的整数规划模型.其次,基于模拟退火算法给出了该问题的近似算法SA,并证明了该算法依概率1全局收敛到最优解.最后,通过数值模拟对... 详细信息

研究机器带学习效应,目标函数为时间表长的两台平行机排序问题,问题是NP-难的.首先建立了求解该问题最优解的整数规划模型.其次,基于模拟退火算法给出了该问题的近似算法SA,并证明了该算法依概率1全局收敛到最优解.最后,通过数值模拟对所提出的算法进行了性能分析.数值模拟结果表明,近似算法SA可以达到最优值的99%,准确度高,算法较有效.

关键词：学习效应平行机模拟退火算法整数规划数值模拟