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Distributionally Robust Newsvendor Model for Fresh Products under Cap-and-Offset Regulation

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Computer Modeling in Engineering & Sciences 2023年第8期136卷 1813-1833页

作者： xuan Zhao Jianteng Xu Hongling lu College of Business Yantai Nanshan UniversityYantai265713China School of Management Qufu Normal UniversityRizhao276826China

The cap-and-offset regulation is a practical scheme to lessen carbon *** retailer selling fresh products can adopt sustainable technologies to lessen greenhouse gas *** aim to analyze the optimal joint strategies on order quantity and sustainable technology investment when the retailer faces stochastic market demand and can only acquire the mean and variance of distribution *** construct a distributionally robust optimization model and use the Karush-Kuhn-Tucker(KKT)conditions to solve the analytic formula of optimal *** comparing the models with and without investing in sustainable technologies,we examine the effect of sustainable technologies on the operational management decisions of the ***,some computational examples are applied to analyze the impact of critical factors on operational strategies,and some managerial insights are given based on the analysis results.

关键词： Distributionally robust optimization KKT conditions cap-and-offset regulation fresh products

Preparation,characterization and catalytic behavior of hierachically porous CuO/α-Fe_2O_3/SiO_2 composite material for CO and o-DCB oxidation

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Journal of Natural Gas Chemistry 2011年第6期20卷 618-622页

作者： xiaodong Ma Xi Feng xuan He Hongwen Guo lu lu Key Laboratory of Environmental Pollution Process and Standard Ministry of Education Tianjin Key Laboratory of Environmental Remediation and Pollution Control College of Environmental Science and Engineering Nankai University Tianjin 300071 China

Hierachically porous （HP） CuO/α-Fe2O3/SiO2 composite material was fabricated by sol-gel method and multi-hydrothermal processes using HP-SiO2 as *** resulting material was characterized by N2 adsorption-desorption,X-ray diffraction and scanning electron *** as-prepared CuO/Fe2O3/HP-SiO2 sample,with α-Fe2O3 and CuO nanocrystals,possessed a co-continuous skeleton,through-macroporous and mesoporous *** catalytic behavior for CO and o-DCB oxidation was *** result showed that CuO/Fe2O3/HP-SiO2 catalyst exhibited high catalytic activity for both CO and o-DCB oxidation,indicating its potential application in combined abatement of CO and chlorinated volatile organic compounds.

关键词： CO and o-DCB oxidation hierachically porous CuO/α-Fe2O3/HP-SiO2 monolith

Biocompatible and non cytotoxic nucleoside-based AIEgens sensor for lighting-up nucleic acids

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Chinese Chemical Letters 2021年第5期32卷 1687-1690页

作者： Qiuyun xiao xuan Zhao Hai Xiong Institute for Advanced Study Shenzhen UniversityShenzhen 518060China Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province College of Optoelectronic EngineeringShenzhen UniversityShenzhen 518060China

Aggregation-induced emission luminogens(AIEgens) have been used in biomacromolecules ***,TPE-dC and TPE-dU acted as the nucleoside-based AIEgens sensors in the first case,which can be used to detect ctDNA and rRNA in vitro and light up the nucleus in vivo depending on the intermolecular binding *** AIE process enables the quantitative analysis or visualization of nucleic acids in solution or gels state,***,confocal laser scanning microscopy(CLSM) images of L929 cells stained with TPE-dC or TPE-dU clearly shows that nucleoside-based AIEgens bio-probes can pass the cell membranes to reach the cell nucleus,without cytotoxicity at the imaging condition(incubation time> 12 h,and 10 μmol/L of concentration).Since the nucleus is rich in DNA/RNA,fluorescence turn-on mode has a great potential in nucleus imaging and clinical diagnosis.

关键词： AIEgens Nucleoside Biosensor Nucleus localization Cell imaging

Bohmian trajectory perspective on strong field atomic processes

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Chinese Physics B 2020年第1期29卷 1-8页

作者： xuan-Yang Lai xiao-Jun Liu State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics Wuhan Institute of Physics and MathematicsInnovation Academy for Precision Measurement Science and TechnologyChinese Academy of SciencesWuhan 430071China

The interaction of an atom with an intense laser field provides an important approach to explore the ultrafast electron dynamics and extract the information of the atomic and molecular structures with unprecedented attosecond temporal and angstrom spatial resolution. To well understand the strong field atomic processes, numerous theoretical methods have been developed, including solving the time-dependent Schr ?dinger equation(TDSE), classical and semiclassical trajectory method, quantum S-matrix theory within the strong-field approximation, etc. Recently, an alternative and complementary quantum approach, called Bohmian trajectory theory, has been successfully used in the strong-field atomic physics and an exciting progress has been achieved in the study of strong-field phenomena. In this paper, we provide an overview of the Bohmian trajectory method and its perspective on two strong field atomic processes, i.e., atomic and molecular ionization and high-order harmonic generation, respectively.

关键词： Bohmian trajectory strong-field ionization high-order harmonic generation

C-S coupling with nitro group as leaving group via simple inorganic salt catalysis

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Chinese Chemical Letters 2020年第1期31卷 84-90页

作者： Maojie xuan Chunlei lu Bo-Lin Lin School of Chemical and Environmental Engineering Shanghai Institute of TechnologyShanghai 201418China School of Physical Science and Technology(SPST) ShanghaiTech UniversityShanghai 201210China

An efficient and practical synthetic protocol to synthesize nonsymmetrical aryl thioethers by nucleophilic aromatic substitution(S_NAr)reaction of nitroarenes by thiols with potassium phosphate as the catalyst is *** moderate to strong electron-withdrawing functional groups are tolerated by the system to provide thioethers in a good to excellent *** also showed that the present method allows access to 3 drug examples in a short reaction ***,mechanistic studies suggest that the reaction may form the classic Meisenheimer complex through a two-step additionelimination mechanism.

关键词： Inorganic-salt catalysis Nucleophilic aromatic substitution C-S bond Denitrification coupling Kinetic isotope effect Meisenheimer complex

Image Analysis by Two Types of Franklin-Fourier Moments

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IEEE/CAA Journal of Automatica Sinica 2019年第4期6卷 1036-1051页

作者： Bing He Jiangtao Cui Bin xiao xuan Wang the School of Computer Science and Technology Xidian UniversityXi’an 710071China the School of Physics and Electrical Engineering WeiNan Normal UniversityWeinan 714000China the Key Laboratory of Computational Intelligence Chongqing University of Posts and TelecommunicationsChongqing 400065China the School of Physics and Information Technology Shaanxi Normal UniversityXi’an 710062China

In this paper,we first derive two types of transformed Franklin polynomial:substituted and weighted radial Franklin *** radial orthogonal moments are proposed based on these two types of polynomials,namely substituted Franklin-Fourier moments and weighted Franklin-Fourier moments(SFFMs and WFFMs),which are orthogonal in polar *** radial kernel functions of SFFMs and WFFMs are transformed Franklin functions and Franklin functions are composed of a class of complete orthogonal splines function system of degree ***,it provides the possibility of avoiding calculating high order polynomials,and thus the accurate values of SFFMs and WFFMs can be obtained directly with little computational *** and experimental results show that Franklin functions are not well suited for constructing higher-order moments of SFFMs and WFFMs,but compared with traditional orthogonal moments(e.g.,BFMs,OFMs and ZMs)in polar coordinates,the proposed two types of Franklin-Fourier Moments have better performance respectively in lower-order moments.

关键词： Franklin functions image reconstruction moment invariants object recognition orthogonal moments

Leader-follower formation of vehicles with velocity constraints and local coordinate frames

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Science China(Information Sciences) 2017年第7期60卷 81-95页

作者： xiao YU lu LIU Department of Mechanical and Biomedical Engineering City University of Hong Kong

This paper studies leader-follower formation control of networked nonholonomic vehicles of unicycle type. Each vehicle is subject to the velocity constraints consisting of saturated angular velocity and bounded linear velocity with positive-minimum value. Each vehicle is allowed to use its local coordinate frame, and the network topology is described by a directed graph containing a spanning tree. Two dynamic control laws satisfying the velocity constraints are developed respectively, such that the leader-follower formation defined in local coordinate frames can be achieved in two cases. The proposed control laws only require each vehicle to use the information of its neighbors in the network via local measurements and communication. Finally,effectiveness is illustrated by simulation results of an example.

关键词： formation control local coordinate frame mobile robot nonholonomic vehicle velocity constraint

The Interoperability of Distributed DBMSs in a CORBA-Based Multidatabase System

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Wuhan University Journal of Natural Sciences 2002年第4期7卷 408-414页

作者： Sarem Mudar Li Rui-xuan xiao Wei-jun lu Zheng-ding Chen Chuan-bo School of Computer Science and Technology Huazhong University of Science and Technology Wuhan Hubei China

One way of achieving interoperability among heterogeneous, distributed DBMSs is through a multidatabase system. Recently, there is an increasing use of CORBA implementation in developing multidatabase systems. Panorama is a multidatabase system that has been implemented on the top of CORBA compliant namely VisiBroker. It aims to achieve interoperability among Oracle, Sybase and other different DBMSs through the registration of these DBMSs to Panorama and through the single global query language PanoSQL designed for this system. In this paper, we first introduce CORBA for the interoperability in multidatabase systems. Then, a general view for our designed multidatabase system, Panorama, has been given. In section four, we introduce the global query language PanoSQL designed to achieve interoperability among the different DBMSs implemented in Panorama. Then, as an example, we present the registration of Oracle to Panorama in order to achieve interoperability in this system. And finally, a conclusion and the future work for this system have been given.

关键词： interoperability heterogeneity CORBA global query language multidatabase systems

Thermodynamics and Kinetics of Bacterial Cellulose Adsorbing Persistent Pollutant from Aqueous Solutions

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Chemical Research in Chinese Universities 2015年第2期31卷 298-302页

作者： lu Min lu xuan XU xiaohui GUAN xiaohui School of Chemical Engineering Northeast Dianli University Jilin 132012 P. R. China

The adsorption capability of bacterial cellulose（BC） for anionic dye acid fuchsine was studied. Meanwhile, the processes of the adsorption were investignted and fitted by adsorption isotherm models, adsorption thermodynamics and adsorption kinetics models, respectively. The changes of BC before and after adsorbing acid fuchsine were investigated via scanning electron microscopy（SEM） and Fourier transform infrared spectroscopy（FTIR） to further explain the adsorption mechanism. The results show that acid fuchsine could be effectively adsorbed by BC. The adsorption process was fitted well by Langmuir equation and the pseudo-second order kinetics, indicating that the adsorption process was monolayer molecule adsorption with the main action of chemical adsorption. The adsorption process was spontaneous and endothermic. Glucuronic acid groups and hydroxyl groups were responsible for the adsorption of acid fuchsine on BC.

关键词： Adsorption thermodynamics Adsorption kinetics Persistent pollutant Bacterial cellulose