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Design and pricing of maintenance service contract based on Nash non-cooperative game approach

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Journal of Systems Engineering and Electronics 2024年第1期35卷 118-129页

作者： su Chun HUANG Kui School of Mechanical Engineering Southeast UniversityNanjing 211189China

Nowadays manufacturers are facing fierce *** from the products,providing customers with multiple maintenance options in the service contract becomes more popular,since it can help to improve customer satisfaction,and ultimately promote sales and maximize profit for the *** considering the combinations of corrective maintenance and preventive maintenance,totally three types of maintenance service contracts are ***,attractive incentive and penalty mechanisms are adopted in the *** this basis,Nash non-cooperative game is applied to analyze the revenue for both the manufacturer and customers,and so as to optimize the pricing mechanism of maintenance service contract and achieve a win-win *** experiments are *** results show that by taking into account the incentive and penalty mechanisms,the revenue can be improved for both the customers and ***,with the increase of repair rate and improvement factor in the preventive maintenance,the revenue will increase gradually for both the parties.

关键词： maintenance service contract Nash game incentive and penalty mechanism corrective maintenance preventive maintenance

Study on viscosity mechanism of caffeine crystallization solutions Author links open overlay panel

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Particuology 2024年第8期91卷 341-350页

作者： Linjing Yu Min su School of Chemical Engineering Hebei University of TechnologyTianjin300130China

The solid-liquid viscous system formed by high viscosity crystallization solution impacts the flow and separation ***,it is very important to study the viscosity mechanism to improve viscosity and regulate crystallization,ensuring a seamless production ***,the viscosity of crystallization solution was taken as the measurement parameter of caffeine as a model *** investigated the viscosity mechanism of caffeine crystallization solutions by combining experiment and *** results indicated that the weak interactions between caffeine and water result in increased viscosity of the caffeine crystallization ***,caffeine crystals possess elongated needle-like shapes,featuring a substantial specific surface ***,there isπ-πstacking occurring between the(200)crystal face and(110)crystal face,effectively fostering coalescence of the crystals towards the radial side of the crystal along its elongated axis,resulting in a more viscous crystallization *** results contribute to comprehending the viscosity mechanism of crystal systems and provide theoretical foundation to enhance engineering efficiency in crystallization.

关键词： Crystallization Caffeine Viscosity mechanism Molecular simulation

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二维钙钛矿结构调控及光物理性能研究进展

微纳电子技术 2019年第8期56卷 622-630,635页

作者：苏剑峰牛强洛阳理工学院

传统的三维(3D)有机-无机卤化物钙钛矿经历了前所未有的快速发展。然而,它们对水分、光和热的固有不稳定性仍然是限制其商业化发展的关键问题。相比之下,新出现的二维(2D)钙钛矿因其巨大的环境优势而受到越来越多的关注。然而,对二维钙... 详细信息

传统的三维(3D)有机-无机卤化物钙钛矿经历了前所未有的快速发展。然而,它们对水分、光和热的固有不稳定性仍然是限制其商业化发展的关键问题。相比之下,新出现的二维(2D)钙钛矿因其巨大的环境优势而受到越来越多的关注。然而,对二维钙钛矿的研究还处于起步阶段,其结构和光物理特性仍有待深入探索。首先,介绍了二维杂化钙钛矿的结构;然后,对该结构中有机胺以及无机元素的选择进行比较讨论,并对二维杂化钙钛矿中独特的激子性质、电声耦合以及自旋轨道耦合(SOC)效应等方面的研究进行了总结;最后,根据前文论述指出下一步研究需要解决的问题,以期为将来开发和制备性能更优异的二维钙钛矿光电器件提供参考。

关键词：二维(2D)钙钛矿有机胺量子阱激子吸收电声耦合自旋轨道耦合(SOC)效应

Towards the Jacobian Conjecture

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Algebra Colloquium 2024年第3期31卷 361-388页

作者： Yucai su Department of Mathematics Jimei UniversityXiamen 361021China School of Mathematical Sciences Tongji UniversityShanghai 200092China

We first show that if there is a counterexample to the two-dimensional Jacobian conjecture,then there exists a nonempty closed smooth affine surface in C^(2)×C^(2)satisfying various ***,we conjecture that such a surf... 详细信息

关键词： two-dimensional Jacobian conjecture Keller maps Jacobian pairs

含Bi中孔分子筛(Ⅱ) 苯乙烯氧化反应机理及条件的优化

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化工学报 2005年第5期56卷 865-869页

作者：陈晓晖苏建峰魏可镁福州大学化肥催化剂国家工程研究中心福建福州350002

以十六烷基三甲基溴化铵为模板剂, 正硅酸乙酯为硅源, 硝酸铋为铋源, 在弱碱性的条件下用水热法合成了Bi Si中孔分子筛, 该分子筛在苯乙烯催化氧化制苯甲醛的反应中具有很好的催化活性. 通过改变溶剂的种类及用量、反应时间、反应温度... 详细信息

以十六烷基三甲基溴化铵为模板剂, 正硅酸乙酯为硅源, 硝酸铋为铋源, 在弱碱性的条件下用水热法合成了Bi Si中孔分子筛, 该分子筛在苯乙烯催化氧化制苯甲醛的反应中具有很好的催化活性. 通过改变溶剂的种类及用量、反应时间、反应温度、双氧水浓度、催化剂用量, 获得了较佳反应条件, 结果表明: 在以25 ml甲醇为溶剂, 以4 5 ml H2O2 (30%) 为氧化剂, 苯乙烯用量1 5 ml, 催化剂用量0 075 g, 80℃反应2 h的条件下, 苯乙烯转化率43 1%, 苯甲醛选择性73 5%, 苯甲醛产率达到31 7%, 同时对可能的苯乙烯氧化反应机理进行了推测.

关键词：中孔分子筛氧化苯乙烯苯甲醛反应机理

A Time-Domain Numerical Simulation for Free Motion Responses of Two Ships Advancing in Head Waves

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China Ocean Engineering 2024年第3期38卷 519-530页

作者： PAN su-yong CHENG Yong School of Naval Architecture and Ocean Engineering Jiangsu University of Science and TechnologyZhenjiang 212003China

The constant panel method within the framework of potential flow theory in the time domain is developed for solving the hydrodynamic interactions between two parallel ships with forward *** solving problems within a time domain framework,the free water surface needs to simultaneously satisfy both the kinematic and dynamic boundary conditions of the free water *** provides conditions for adding artificial damping *** the Runge−Kutta method to solve equations related to *** upwind differential scheme is used in the present method to deal with the convection terms on the free surface to prevent waves *** the comparison with the available experimental data and other numerical methods,the present method is proved to have good mesh convergence,and satisfactory results can be *** constant panel method is applied to calculate the hydrodynamic interaction responses of two parallel ships advancing in head *** simulations are conducted on the effects of forward speed,different longitudinal and lateral distances on the motion response of two modified Wigley ships in head *** further investigations are conducted on the effects of different ship types on the motion response.

关键词： ship motions time domain simulation forward speed different distances wave loads

Stochastic and Distributed Optimal Energy Management of Active Distribution Networks Within Integrated Office Buildings

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CSEE Journal of Power and Energy Systems 2024年第2期10卷 504-517页

作者： Zening Li su su Xiaolong Jin Mingchao Xia Qifang Chen Koji Yamashita National Active Distribution Network Technology Research Center Beijing Jiaotong UniversityBeijing 100044China Key Laboratory of Smart Grid of Ministry of Education Tianjin UniversityTianjin 300072China Electrical and Computer Engineering University of California RiversideCA92521USA.

This paper proposes a stochastic and distributed optimal energy management approach for active distribution networks(ADNs)within office *** proposed approach aims at scheduling office buildings fitted with heating ventilation and air conditioning(HVAC)systems,and electric vehicle(EV)charging piles,to participate in the ADN ***,an energy management approach for the ADN with aggregated office buildings is *** the ADN optimization model is formulated considering the detailed building thermal dynamics and the mobile behaviors of ***,to consider un-certainties of photovoltaic(PV)power,scenario-based stochastic programming is integrated into the ADN optimization *** further realize the stochastic energy management of the ADN within office buildings in a distributed manner,the alternating direction method of multipliers(ADMM)is used to solve the ADN optimization *** original ADN optimization problem is divided into the network-side and the building-side sub-problems to effectively protect the privacy of the ADN and the office ***,the ADN optimization model incorporating office buildings is validated in the winter by numerical *** addition,the impacts of comfort temperature range and expected state of charge(SOC)at departure are *** Terms—ADN,EV,HVAC system,Office building,Stochastic and distributed energy management.

关键词： ADN EV HVAC system Office building Stochastic and distributed energy management

Numerical simulation of microwave-induced cracking and melting of granite based on mineral microscopic models

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International Journal of Minerals,Metallurgy and Materials 2024年第7期31卷 1512-1524页

作者： Xiaoli su Diyuan Li Junjie Zhao Mimi Wang Xing su Aohui Zhou School of Resources and Safety Engineering Central South UniversityChangsha 410083China

This study introduces a coupled electromagnetic–thermal–mechanical model to reveal the mechanisms of microcracking and mineral melting of polymineralic rocks under microwave *** tests validate the rationality of the proposed *** microscopic mineral sections into the granite model for simulation shows that uneven temperature gradients create distinct molten,porous,and nonmolten zones on the fracture ***,the varying thermal expansion coefficients and Young's moduli among the minerals induce significant thermal stress at the mineral *** and biotite with higher thermal expansion coefficients are subjected to compression,whereas plagioclase with smaller coefficients experiences tensile *** the molten zone,quartz undergoes transgranular cracking due to theα–βphase *** local high temperatures also induce melting phase transitions in biotite and *** numerical study provides new insights into the distribution of thermal stress and mineral phase changes in rocks under microwave irradiation.

关键词： microwave numerical modeling microcracking phase change granite

气相色谱法和气相色谱-质谱法测定大蒜中甲基嘧啶磷和乙基嘧啶磷残留量

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理化检验（化学分册） 2019年第4期55卷 457-462页

作者：许天钧苏建峰辽东学院化学工程学院丹东118003 福建中检华日食品安全检测有限公司福州350008

取经捣碎并混匀的大蒜样品10.00g,加入水3mL、乙腈20mL、氯化钠3g和2个陶瓷均质子,涡旋提取2min,离心,取上层清液10.0mL于40℃下蒸发至近干,用含1%(体积分数)甲酸的甲醇(1+5)混合液溶解残渣。所得溶液流经固相萃取柱(SPE)净化,用3mL含1%... 详细信息

取经捣碎并混匀的大蒜样品10.00g,加入水3mL、乙腈20mL、氯化钠3g和2个陶瓷均质子,涡旋提取2min,离心,取上层清液10.0mL于40℃下蒸发至近干,用含1%(体积分数)甲酸的甲醇(1+5)混合液溶解残渣。所得溶液流经固相萃取柱(SPE)净化,用3mL含1%(体积分数)甲酸的甲醇(1+5)混合液淋洗萃取柱,弃去淋洗液。用含0.5%(体积分数)氨水的甲醇混合液将吸附在SPE柱上的分析物洗脱,洗脱液在40℃下吹氮至近干,用丙酮-正己烷(1+9)混合液溶解残渣并定容至1.0mL。分别采用气相色谱-火焰光度检测器(GC-FPD)和气相色谱-质谱法(GCMS)测定此溶液中甲基嘧啶磷和乙基嘧啶磷的含量。结果表明:甲基嘧啶磷和乙基嘧啶磷的质量浓度在一定范围内与其峰面积之间呈线性关系,甲基嘧啶磷和乙基嘧啶磷采用GC-FPD和GC-MS进行测定的测定下限(10S/N)均为0.01mg·kg-1。按照标准加入法进行加标回收试验,采用GCFPD测得回收率在81.6%～91.6%之间,采用GC-MS测得回收率在94.4%～98.1%之间,两方法测定值的相对标准偏差(n=6)分别在4.1%～8.6%和3.1%～9.4%之间。

关键词：气相色谱法火焰光度检测器气相色谱-质谱法固相萃取甲基嘧啶磷乙基嘧啶磷大蒜