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Application of Transformed Two-Stage Network DEA to Strategic Design of Biofuel Supply Chain Network

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Journal of Systems Science and Systems Engineering 2023年第2期32卷 129-151页

作者： Jae-dong hong Industrial Engineering Program South Carolina State UniversityOrangeburgSCUSA

This paper proposes an innovative procedure for designing efficient biomass-biofuel logistics networks(BBLNs).This procedure is based on the two-stage network data envelopment analysis(TSN-DEA)models that have been developed to provide specific process guidance for the managers to improve the efficiency of the decision-making unit(DMU)with the TSN *** crucial issue of the TSN-DEA is that the overall efficiency score depends on the DMUs under ***,the rankings for the DMUs generated by the TSN-DEA model are *** a result,the TSN-DEA-based ranking methods are *** TSN-DEA’s inconsistency frequently makes it difficult for decision-makers to select the top-rated *** develop the transformed TSN(T-TSN)DEA method by applying the multi-criteria DEA model to overcome this *** proposed method transforms the DMUs with any number of inputs,intermediate measures,and outputs in the TSN process,through the multi-objective programming model with a minimax objective approach,into the DMUs with two inputs and one output in the single-stage network(SSN)***,the well-known DEA methods for the SSN,such as the cross-efficiency and super-efficiency DEA methods,can be applied to evaluate and rank the transformed DMUs more *** exhibit the applicability of the proposed approach for the BBLN design problem.A case study of South Carolina in the USA demonstrates that the proposed method performs well in identifying efficient BBLN schemes more consistently than the traditional TSN-DEA.

关键词： Biomass-biofuel logistics network two-stage network data envelopment analysis efficiency score decision-making unit multiple criteria

The Possibility of Detecting our Solar System through Astrometry

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Research in Astronomy and Astrophysics 2023年第11期23卷 198-204页

作者： dong-hong Wu Department of Physics Anhui Normal UniversityWuhu 241000China

Searching for exoplanets with different methods has always been the focus of astronomers over the past few *** multiple planet detection techniques,astrometry stands out for its capability to accurately determine the orbital parameters of *** this study,we examine the likelihood of extraterrestrial intelligent civilizations detecting planets in our solar system using the astrometry *** conducting injection-recovery simulations,we investigate the detectability of the four giant planets in our solar system under different observing baselines and observational *** findings indicate that extraterrestrial intelligence could detect and characterize all four giant planets,provided they are observed for a minimum of 90 yr with signal-noise ratios exceeding *** individual planets such as Jupiter,Saturn,and Neptune,a baseline that surpasses half of their orbital periods is necessary for ***,Uranus requires longer observing baselines since its orbital period is roughly half of that of *** the astrometry precision is equal to or better than 10μas,all 8707 stars located within30 pc of our solar system possess the potential to detect the four giant planets within 100 ***,our prediction suggests that over 300 stars positioned within 10 pc from our solar system could detect our Earth if they achieve an astrometry precision of 0.3μas.

关键词： astrometry planets and satellites:detection Planetary Systems

Structures and Surface States of Polymer Brushes in Good Solvents:Effects of Surface Interactions

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Chinese Journal of Polymer Science 2018年第9期36卷 1047-1054页

作者： Yi-Xin Liu hong-dong Zhang State Key Laboratory of Molecular Engineering of Polymers Department of Macromolecular Science Fudan University

The influence of the surface interaction on the mesoscopic structure of grafted polymers in good solvents has been examined. At high surface coverage, tethered polymers are in the brush state and the parabolic segment density profile is confirmed by self-consistent field theory （SCFT） calculations. It is found that this is a universal behavior for a whole range of surface interactions from complete repulsion to strong attraction. More interestingly, finite surface repulsion may lead to the maximum in the proximal layer of its segment density profile, which is significantly different from both the depletion layer of pure repulsion and the adsorbing layer of attraction. In addition to the brush state on both repulsive and attractive surfaces, three additional surface states were identified by analyzing the scaling behavior of the layer thickness of polymer brushes： the mushroom state on repulsive substrates, the dilute and the semidilute surface states on attractive substrates.

关键词： Self-consistent field theory Scaling theory Polymer thin film Polymer brush

SIMULATION OF THE ATOMIZED FLOW BY SLIT TYPE BUCKET ENERGY DISSIPATOR

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Journal of Hydrodynamics 2005年第6期17卷 758-763页

作者： LIU Shi-he DUAN hong-dong School of Water Resource and Hydropower Wuhan University Wuhan 430072 China Water Resources and Hydropower Planning and Design general Institute MWR Beijing 100011 China

Slit type bucket is one kind of flip bucket for energy dissipation generally used in the hydraulic project. In this paper the atomized flow produced behind this energy dis sipator is analyzed, a numerical model for the aerated jet con sidering air entrainment and air resistance force is suggested, and simulation of the rain resulted by the atomized flow is also discussed. Furthermore, the prototype observation data for the atomized flow of dongjiang Hydropower Station is used to verify the model suggested.

关键词： two phase flow atomized flow slit type energy dissipator

High-Temperature Structural Stabilities of Ni-Based SingleCrystal Superalloys Ni–Co–Cr–Mo–W–Al–Ti–Ta with Varying Co Contents

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Acta Metallurgica Sinica(English Letters) 2018年第2期31卷 127-133页

作者： Yu Zhang Qing Wang hong-Gang dong Chuang dong hong-Yu Zhang Xiao-Feng Sun Key Laboratory of Materials Modification by Laser Ion and Electron Beams (Dalian University of Technology) Ministry of Education Superalloys Division Institute of Metal Research Chinese Academy of Sciences

It has been recently pointed out that the compositions of industrial alloys are originated from cluster-plus-glueatom structure units in solid solutions. Specifically for Ni-based superalloys, after properly grouping the alloying elements into Al, Ni-like（Ni^-）, γ＇-forming Cr-like（Cr^-γ＇） and γ-forming Cr-like（Cr^-γ＇）, the optimal formula for single-crystal superalloys is established [Al–Ni^-12]（AlCr^-γ0：5Cr^-γ1：5）. The Co substitutions for Ni at the shell sites are conducted on the basis of the first-generation single-crystal superalloy AM3, formulated as [Al-Ni2-xCox]（Al1Ti0.25Ta0.25Cr1W0.25Mo0.25）, with x = 1.5, 1.75, 2 and 2.5（the corresponding weight percents of Co are 9.43, 11.0, 12.57 and 15.71, respectively）. The900 ℃ long-term aging follows the Lifshitz–Slyozov–Wagner theory（LSW theory）, and the Co content does not have noticeable influence on the coarsening rate of c0. The microstructure and creep behavior of the four（001） single-crystal alloys are investigated. The creep rupture lifetime is reduced as Co increases. The alloy with the lowest Co（9.43 Co） shows the longest lifetime of about 350 h at 1050 ℃/120 MPa, and all the samples show N-type rafting after creep tests.

关键词： Nickel-based single-crystal superalloys Cluster-plus-glue-atom model Composition formula Co

Application of color structured light pattern to measurement of large out-of-plane deformation

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Acta Mechanica Sinica 2011年第6期27卷 1098-1104页

作者： Xing Lu Jun-hong Zhou dong-dong Liu Jue Zhang College of Engineering Peking University100871 Beijing China

Measurement of out-of-plane deformation is significant to understanding of the deflection mechanisms of the plate and tube *** this study,a new surface contouring technique with color structured light is applied to measure the out-of-plane deformation of structures with one-shot *** color fringe recognizing,decoding and triangulation processing for the captured images corresponding to each deformation state,the feasibility of the method is testified by the measurement of elastic deflections of a flexible square plate,showing good agreement with those from the calibrated displacement *** plastic deformation of two alloy aluminum rectangular tubes is measured to show the technique application to surface topographic evaluation of the buckling structures with large displacements.

关键词： Out-of-plane deformation Surface contouring Color structured light Plate deflection - Rectangular tube buckling

Sonocatalytic degradation of methyl orange in the presence of (nanometer and ordinary) anatase TiO_2 powders

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Journal of Environmental Sciences 2005年第3期17卷 414-418页

作者： WANGJun GUOBao-dong ZHANGZhao-hong ZHANGXiang-dong WUJing LIhong DepartmentofChemistry LiaoningUniversityShenyang110036China

The nanometer and ordinary anatase titanium dioxide(TiO_2) powders were adopted as the sonocatalysts for the degradation of methyl orange used as a model compound for the first time. It was found that the sonocatalytic degradation effect of methyl orange in the presence of TiO_2 powder were much better than that without TiO_2, but the sonocatalytic activity of the nanometer anatase TiO_2 particle was obviously higher than that of ordinary anatase TiO_2 particle. Although there are many factors influencing sonocatalytic degradation of methyl orange, the experimental results showed that the best degradation ratio of methyl orange could be obtained when the experimental conditions were: initial concentration 15 mg/L, nanometer anatase TiO_2 adding amount 750 mg/L, ultrasonic frequency 40 kHz, output power 50 W, pH = 3.0 and temperature 40℃ within 150 min. In addition, the catalytic activity of reused nanometer anatase TiO_2 catalyst was also studied and found to decline gradually comparing with initial nanometer anatase TiO_2 catalyst. All experiments indicated that the method of the sonocatalytic degradation of organic pollutants in the presence of TiO_2 powder was an advisable choice for non- or low-transparent organic wastewaters.

关键词： titanium dioxide(TiO_2) sonocatalytic degradation methyl orange nanometer anatase ordinary anatase

Oblivious Polynomial Evaluation

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Journal of Computer Science & Technology 2004年第4期19卷 550-554页

作者： hong-DaLi dong-YaoJi Deng-GuoFeng BaoLi StateKeyLabofInformationSecurity GraduateSchoolofChineseAcademyofSciencesBeijing100039P.R.China

The problem of two-party oblivious polynomial evaluation (OPE) is studied, where one party (Alice) has a polynomial P(x) and the other party (Bob) with an input x wants to learn P(x) in such an oblivious way that Bob obtains P(x) without learning any additional information about P except what is implied by P(x) and Alice does not know Bob's input x. The former OPE protocols are based on an intractability assumption except for OT protocols. In fact, evaluating P(x) is equivalent to computing the product of the coefficient vectors (a(0),...,a(n)) and (1,...,x(n)). Using this idea, an efficient scale product protocol of two vectors is proposed first and then two OPE protocols are presented which do not need any other cryptographic assumption except for OT protocol. Compared with the existing OPE protocol, another characteristic of the proposed protocols is the degree of the polynomial is private. Another OPE protocol works in case of existence of untrusted third party. Keywords oblivious polynomial evaluation, oblivious transfer, secure multi-party computation, information.

关键词： oblivious polynomial evaluation oblivious transfer secure multi-party computation information security

Optical coatings for fiber lasers

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光学精密工程 2005年第4期13卷 480-482页

作者： hong dong-mei ZHU Zhen YUE Wei North China Research Institute of Electro-optics BeiJing 100015 China

Fiber laser is the future development direction for the high energy lasers. This paper describs two kinds of optical coatings for fiber laser, including long and short wave pass filters. The one characteristic of fiber laser coatings lies in that coatings should separate two closely wavelength light including laser pump wavelength (980 nm) and laser irradiation wavelength(1 050～1 100 nm). At the same time, the coatings should have high laser damage threshold.

关键词：光纤激光器光学涂覆技术结构设计波长