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Entropy-based procedures for intuitionistic fuzzy multiple attribute decision making

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Journal of Systems Engineering and Electronics 2009年第5期20卷 1001-1011页

作者： xu zeshui~(1,2) & hu {3.~3.1.school of economics and management,southeast univ.,nanjing 210096,p.r.China 2.Inst.of Sciences,pLA univ.of Sciences and Technology,nanjing 210007,p.r.China 3.Inst.of Communications Engineering,pLA univ.of Sciences and Technology, nanjing 210007,p.r.China school of economics and management Southeast Univ. Nanjing 210096 P. R. China Inst. of Sciences PLA Univ. of Sciences and Technology Nanjing 210007 P. R. China Inst. of Communications Engineering PLA Univ. of Sciences and Technology Nanjing 210007 P. R. China

The class of multiple attribute decision making （MADM） problems is studied, where the attribute values are intuitionistic fuzzy numbers, and the information about attribute weights is completely unknown. A score function is first used to calculate the score of each attribute value and a score matrix is constructed, and then it is transformed into a normalized score matrix. Based on the normalized score matrix, an entropy-based procedure is proposed to derive attribute weights. Furthermore, the additive weighted averaging op.r.tor is utilized to fuse all the normalized scores into the overall scores of alternatives, by which the ranking of all the given alternatives is obtained. This pap.r.is concluded by extending the above results to interval-valued intuitionistic fuzzy set theory, and an illustrative example is also provided.

关键词： multiple attribute decision making intuitionistic fuzzy number score matrix entropy additive weighted averaging op.r.tor.

Laser-Constructing 3. Copp.r.Current Collector with Crystalline Orientation Selectivity for Stable Lithium Metal Batteries

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Energy & Environmental Materials 2024年第6期7卷 129-139页

作者： hui Li Gang Wang Jin hu Jun Li Jiaxu huang Shaolin xu Dep.r.ment of Mechanical and Energy Engineering Southern University of Science and TechnologyShenzhen 518000China

The practical application of lithium(Li)metal anodes in high-capacity batteries is impeded by the formation of hazardous Li *** address this challenge,this research presents a novel methodology that combines laser ablation and heat treatment to precisely induce controlled grain growth within laser-structured grooves on copp.r.Cu)current ***,this ap.r.ach enhances the prevalence of Cu(100)facets within the grooves,effectively lowering the overpotential for Li nucleation and promoting preferential Li *** ap.r.aches that modify the entire surface of collectors,our work focuses on selectively enhancing lithiophilicity within the grooves to mitigate the formation of Li dendrites and exhibit exceptional p.r.ormance *** half-cell with these collectors maintains a remarkable Coulombic efficiency of 97.42%over 3.0 cycles at 1 mA cm^(−2).The symmetric cell can cycle stably for 1600 h at 0.5 mA cm^(−2).Furthermore,when integrated with LiFepO4 cathodes,the full-cell configuration demonstrates outstanding capacity retention of 92.3.%after 400 cycles at a 1C discharge *** study introduces a novel technique for fabricating selective lithiophilic three-dimensional(3.)Cu current collectors,thereby enhancing the p.r.ormance of Li metal *** insights gained from this ap.r.ach hold promise for enhancing the p.r.ormance of all laser-processed 3. Cu current collectors by enabling precise lithiophilic modifications within complex structures.

关键词： copp.r.current collector heat treatment laser processing lithium metal battery selective crystalline orientation

OrDErED WEIGHTED DISTANCE MEASUrE

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Journal of Systems Science and Systems Engineering 2008年第4期17卷 432-445页

作者： zeshui xu~1 Jian CHEN~2 1 school of {3. and management,southeast univ.rsity,nanjing,Jiangsu 210096,China 2 school of {3. and management,Tsinghua univ.rsity,Beijing,100084,China school of economics and management Southeast University Nanjing Jiangsu 210096 China school of economics and management Tsinghua University Beijing 100084 China

The aim of this pap.r.is to develop an ordered weighted distance(OWD) measure,which is the generalization of some widely used distance measures,including the normalized Hamming distance, the normalized Euclidean distance,the normalized geometric distance,the max distance,the median distance and the min distance,***,the ordered weighted averaging op.r.tor,the generalized ordered weighted aggregation op.r.tor,the ordered weighted geometric op.r.tor,the averaging op.r.tor,the geometric mean op.r.tor,the ordered weighted square root op.r.tor,the square root op.r.tor,the max op.r.tor,the median op.r.tor and the min op.r.tor are also the special cases of the OWD *** methods depending on the input arguments are given to determine the weights associated with the OWD *** prominent characteristic of the OWD measure is that it can relieve(or intensify) the influence of unduly large or unduly small deviations on the aggregation results by assigning them low(or high) *** desirable characteristic makes the OWD measure very suitable to be used in many actual fields,including group decision making,medical diagnosis, data mining,and pattern recognition,***,based on the OWD measure,we develop a group decision making ap.r.ach,and illustrate it with a numerical example.

关键词： Group decision making ordered weighted distance(OWD) measure aggregation op.r.tor

Near-Field Heat Transfer Enhancement of SiC-hBN-InSb Thermophotovoltaic System by Graphene Strong Coupling Effects

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Journal of Thermal Science 2024年第4期33卷 1409-1420页

作者： xu Zhiguo hu Zhifang school of Mechanical Engineering Shanghai Jiao Tong UniversityShanghai200240China

Near-field thermophotovoltaic(NTpV)devices comprising a SiC-hBN-graphene emitter and a graphene-InSb cell with gratings are designed to enhance the p.r.ormance of the NTpV *** electrodynamics and rigorous coupled-wave analysis are employed to calculate radiative heat transfer *** is found that the NTpV systems with two graphene ribbons p.r.orm better due to the graphene strong coupling *** effects of graphene chemical potential are *** is demonstrated that near-field radiative heat transfer of thermophotovoltaic devices is enhanced by the coupling of surface plasmon polaritons,surface phonon polaritons,hyp.r.olic phonon polaritons,and magnetic polaritons caused by the graphene strong coupling *** splitting frequency of different polaritons is calculated to quantify the mutual interaction of graphene strong coupling ***,the effects of cell grating filling ratio are *** excitation of magnetic polaritons is affected by the graphene ribbon and the cell filling *** investigation provides a new explanation of the enhancement mechanism of graphene-assisted thermophotovoltaic systems and a novel ap.r.ach for improving the output power of the near-field thermophotovoltaic system.

关键词： near-field radiative heat transfer thermophotovoltaics strong coupling effect multiple magnetic polaritons graphene-hbn heterostructures

Intuitionistic fuzzy hierarchical clustering algorithms

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Journal of Systems Engineering and Electronics 2009年第1期20卷 90-97页

作者： xu zeshui1,2 1. Coll. of economics and {3., southeast univ., nanjing 210096, p. r. China 2. Inst. of Sciences, pLA univ. of Science and Technology, nanjing 210007, p. r. China Coll. of economics and management Southeast Univ. Nanjing 210096 P. R. China Inst. of Sciences PLA Univ. of Science and Technology Nanjing 210007 P. R. China

Intuitionistic fuzzy set （IFS） is a set of 2-tuple arguments, each of which is characterized by a membership degree and a nonmembership degree. The generalized form of IFS is interval-valued intuitionistic fuzzy set （IVIFS）, whose components are intervals rather than exact numbers. IFSs and IVIFSs have been found to be very useful to describe vagueness and uncertainty. However, it seems that little attention has been focused on the clustering analysis of IFSs and IVIFSs. An intuitionistic fuzzy hierarchical algorithm is introduced for clustering IFSs, which is based on the traditional hierarchical clustering procedure, the intuitionistic fuzzy aggregation op.r.tor, and the basic distance measures between IFSs： the Hamming distance, normalized Hamming, weighted Hamming, the Euclidean distance, the normalized Euclidean distance, and the weighted Euclidean distance. Subsequently, the algorithm is extended for clustering IVIFSs. Finally the algorithm and its extended form are applied to the classifications of building materials and enterprises respectively.

关键词： intuitionistic fuzzy set interval-valued intuitionistic fuzzy set hierarchical clustering intuitionisticfuzzy aggregation op.r.tor distance measure.

Multi-area Frequency-constrained Unit Commitment for power Systems with High penetration of renewable Energy Sources and Induction Machine Load

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Journal of Modern power Systems and Clean Energy 2024年第3期12卷 754-766页

作者： Leibao Wang hui Fan Jifeng Liang Longxun xu Tiecheng Li peng Luo Bo {3. Kaigui Xie the State Grid Hebei Electric power research Institute Shijiazhuang 050021China State Key Laboratory of power Transmission Equipment&System Security and New Technology Chongqing UniversityChongqing 400044China

The increasing penetration of renewable energy sources(rESs)brings great challenges to the frequency security of power *** traditional frequency-constrained unit commitment(FCUC)analyzes frequency by simplifying the average system frequency and ignoring numerous induction machines(IMs)in load,which may underestimate the risk and increase the op.r.tional *** this pap.r.we consider a multiarea frequency response(MAFr)model to capture the frequency dynamics in the unit scheduling problem,in which regional frequency security and the inertia of IM load are modeled with high-dimension differential algebraic equations.A multi-area FCUC(MFCUC)is formulated as mixed-integer nonlinear programming(MINLp)on the basis of the MAFr ***,we develop a multi-direction decomposition algorithm to solve the MFCUC *** original MINLp is decomposed into a master problem and *** subproblems check the nonlinear frequency dynamics and generate linear optimization cuts for the master problem to improve the frequency security in its optimal *** studies on the modified IEEE 3.-bus system and IEEE 118-bus system show a great reduction in op.r.tional ***,simulation results verify the ability of the proposed MAFr model to reflect regional frequency security and the available inertia of IMs in unit scheduling.

关键词： Decomposition algorithm frequency response frequency-constrained unit commitment induction machine multi-area mixed-integer nonlinear programming(MINLp)

Dynamic characteristics and application of dual throat fluidic thrust vectoring nozzle

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Chinese Journal of Aeronautics 2024年第9期37卷 85-99页

作者： Buxian xu Dongping hu Lihao FENG Fluid Mechanics Key Laboratory of Ministry of Education Beihang UniversityBeijing 100191China State Key Laboratory of Clean and Efficient Turbomachinery power Equipment Dongfang Electric Corporation Dongfang Turbine Co.LTDDeyang 618000China

Thrust vectoring technology plays an imp.r.ant role in improving the maneuverability of *** order to overcome the disadvantages of mechanical thrust vectoring nozzles,such as complications of structure and significant increases in weight and cost,fluidic thrust vectoring noz-zles are *** Throat fluidic thrust vectoring Nozzle(DTN)has received wide attention due to its excellent thrust vectoring efficiency and minimal thrust *** this study,three-dimensional unsteady numerical simulations of a single axisymmetric DTN are conducted first to analyze its dynamic *** the pitch and yaw control characteristics of DTN equipped on a flying-wing aircraft are *** is found that the dynamic response will exp.r.ence three stages:rapid-deflecting stage,oscillating stage,and steady stage.A complete recirculation zone forms at the end of the rapid-deflecting stage,which pushes the primary flow to attach to the wall opposite the secondary ***,the exhaust flow is *** terms of DTN's appli-cation,the DTN equipped on the flying-wing aircraft is capable of providing effective pitch and yaw moments at all angles of attack and Mach *** addition,continuous pitch and yaw moments can be obtained by adjusting the secondary mass flow *** control moment is gen-erated due to the asymmetrical pressure distribution of nozzle surface,which is mainly contributed by the pressure decrease on the secondary injection ***,the DTN equipped on the flying-wing aircraft has a relatively high thrust vectoring efficiency of around 5°/%and a thrust coefficient of around 0.95 when nozzle pressure ratio equals *** results provide an imp.r.ant theoretical basis for the practical application of DTN.

关键词： Dual throat nozzle Dynamic response charac-teristic Flowcontrol Flying-wing aircraft

Total synthesis of a putative yuzurimine-type Daphniphyllum alkaloid C_(14)–epi-deoxycalyciphylline H

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Chinese Chemical Letters 2024年第4期35卷 336-339页

作者： Jingping hu Jing xu Shenzhen Grubbs Institute and Dep.r.ment of Chemistry and Guangdong provincial Key Laboratory of Catalysis and Shenzhen Key Laboratory of Small Molecule Drug Discovery and Synthesis Southern University of Science and TechnologyShenzhen 518055China

One of the largest subfamilies within the famous Daphniphyllum alkaloid family is made up of the yuzurimine-type(or macrodaphniphyllamine-type) alkaloids. Their complex aza-polycyclic caged structures, several contiguous stereogenic centers, and vicinal all-carbon quaternary centers make these alkaloids formidable challenge for synthetic chemists. recently, synthesis of these alkaloids has received extensive attention from our community. Herein, we wish to rep.r. the total synthesis of C_(14)–epideoxycalyciphylline H, a putative member of yuzurimine-type alkaloid subfamily. Key transformations employed in our ap.r.ach include an intramolecular prins reaction and a pd-catalyzed enyne cycloisomerization. In addition, synthesis of a daphnezomine L-type alkaloid, paxdaphnidine A, was also studied.

关键词： Total synthesis Daphniphyllum alkaloids Yuzurimine-type alkaloids prins reaction Enyne cycloisomerization

The sudden ocean warming and its potential influences on earlyfrozen landfast ice in the prydz Bay, East Antarctica

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Acta Oceanologica Sinica 2024年第5期43卷 65-77页

作者： Haihan hu Jiechen Zhao Jingkai Ma Igor Bashmachnikov Natalia Gnatiuk Bo xu Fengming hui school of Geospatial Engineering and Science Sun Yat-sen Universityand Southern Marine Science and Engineering Guangdong Laboratory(Zhuhai)Zhuhai 519082China Key Laboratory of Comprehensive Observation of polar Environment(Sun Yat-sen univ.rsity) Ministry of EducationZhuhai 519082China Qingdao Innovation and Development Base(Centre)of Harbin Engineering univ.rsity Qingdao 266500China Key Laboratory for polar Acoustics and Application of Ministry of Education(Harbin Engineering univ.rsity) Harbin 150001China Key Laboratory of research on Marine Hazards Forecasting National Marine Environmental Forecasting CentreBeijing 100081China Nansen International Environmental and remote Sensing Centre St.Petersburg 199034Russia Saint petersburg State univ.rsity St.Petersburg 199034Russia Antarctic Great Wall Ecology National Observation and research Station Polar Research Institute of ChinaShanghai 201209China

The ocean conditions beneath the ice cover play a key role in understanding the sea ice mass balance in the polar *** integrated high-frequency ice-ocean observation system,including Acoustic Doppler Velocimeter,Conductivity-Temp.r.ture-Depth Sensor,and Sea Ice Mass Balance Array(SIMBA),was deployed in the landfast ice region close to the Chinese Zhongshan Station in Antarctica.A sudden ocean warming of 0.14℃(prved beneath early-frozen landfast ice,from(−1.60±0.03.℃during April 16-19 to(−1.46±0.07)℃during April 20-23.2021,which is the only significant warming event in the nearly 8-month *** sudden ocean warming brought a double rise in oceanic heat flux,from(21.7±11.1)W/m^(2) during April 16-19 to(44.8±21.3.W/m^(2) during April 20-23.2021,which shifted the original growth phase at the ice bottom,leading to a 2 cm melting,as shown from SIMBA and borehole ***,the slowdown of ice bottom freezing decreased salt rejection,and the daily trend of observed ocean salinity changed from+0.02 d^(-1) during April 16-19,2021 to+0.003.d^(-1) during April 20-23.*** potential reasons are increased air temp.r.ture due to the transit cyclones and the weakened vertical ocean mixing due to the tide phase transformation from semi-diurnal to *** high-frequency observations within the ice-ocean boundary layer enhance the comprehensive investigation of the ocean’s influence on ice evolution at a daily scale.

关键词： sudden ocean warming oceanic heat flux landfast ice Zhongshan Station in-situ observation