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Some Characterizations of Strongly Semisimple Ordered Semigroups

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Communications in Mathematical Research 2013年第2期29卷 155-166页

作者： Tang Jian xie xiang-yun Du Xian-kun School of Mathematics and Computational Science Fuyang Normal College School of Mathematics and Computational Science Wuyi University

In this paper, the concept of quasi-prime fuzzy left ideals of an ordered semigroup S is introduced. Some characterizations of strongly semisimple ordered semigroups are given by quasi-prime fuzzy left ideals of S. In particular, we prove that S is strongly semisimple if and only if each fuzzy left ideal of S is the intersection of all quasi-prime fuzzy left ideals of S containing it.

关键词： ordered semigroup ordered fuzzy point quasi-prime fuzzy left ideal strongly semisimple ordered semigroup

Application of Drone in Solving Last Mile Parcel Delivery

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Journal of Systems Science and Information 2018年第4期9卷 302-319页

作者： Jiashi LIU Zhongliang GUAN Jennifer SHANG xiang xie School of Economics and Management Beijing Jiaotong University Joseph M.Katz Graduate School of Business University of Pittsburgh

The article is about solving the last mile delivery problem in rural town or village. We want to test the drone’s potential in parcel delivery. The objectives are 1) to introduce the cluster and truck-drone in tandem delivery method, 2) to compare the new method with the traditional TSP method in aspect of truck running distance, energy using and time occupation. The parcel delivery demand is sparse, so it is not dense enough for a truck to carry on delivery. We try to identify the best route for the drone to deliver the goods. We use k-mean method to carry on clustering, then we use enumeration method to fulfill the centroids delivery, which comes from the depot. We design a model and calculate the energy, time and distance saving between drone using method(DTSP) and traditional TSP method. The drone attended delivery saves truck delivery distance, energy consumption and *** truck running distance of DTSP method saves 91.87%, the truck running distance is shortened from 189.69 km to 15.4252 km. The DTSP method saves 90.45% of energy. The DTSP method brings a29.75% cutoff in time aspect when there are two drone in running. The research introduces the cluster and TSP combination method, which is a good way to carry on last mile delivery. The result shows a bright future for drone to attend parcel delivery. The e-commerce corporation can apply this method in practice.

关键词： drone last mile delivery e-commerce genetic algorithm

Hypersemilattice Strongly Regular Relationson Ordered Semihypergroups

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Communications in Mathematical Research 2019年第2期35卷 115-128页

作者： Tang Jian xie xiang-Yun Du Xian-kun School of Mathematics and Statistics Fuyang Normal University Fuyang Anhui 236037 School of Mathematics and Computational Science Wuyi University Jiangmen Guangdong 529020 不详

In this paper, we ?rst consider the regular and strongly regular relations on ordered semihypergroups in detail. In particular, we introduce the concepts of the hypersemilattice strongly regular relations and complete hypersemilattice strongly regular relations on ordered semihypergroups, and investigate their related ***, the properties of hyper?lters of an ordered semihypergroup are studied,and several related applications are given. Especially, we prove that the equivalence relation N on an ordered semihypergroup S is the least complete hypersemilattice strongly regular relation on S.

关键词： ordered semihypergroup strongly regular relation hyperfilter

On C-left Hyperideals of Ordered Semihypergroups

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Communications in Mathematical Research 2017年第3期33卷 223-237页

作者： TANG JIAN xie xiang-YUN Du Xian-kun School of Mathematics and Statistics Fuyang Normal College Fuyang Anhui 236037 School of Mathematics and Computational Science Wuyi University Jiangmen Guangdong 529020 不详

In this paper, the concept of C-left hyperideals is introduced in ordered semihypergroups, and several related properties are investigated. In particular, we discuss the relationships between the greatest left hyperideals and C-left hyperideals of ordered semihypergroups. Furthermore, we introduce the concept of left bases of an ordered semihypergroup, and give out the sufficient and necessary conditions of the existence of the greatest C-left hyperideal of an ordered semihypergroup by the properties of left bases. The result about C-left ideals in ordered semigroups is generalized to the ordered semihypergroups.

关键词： ordered semihypergroup C-left hyperideal maximal left hyperideal left base

Electrochemical radical C(sp^(3))-H arylation of xanthenes with electron-rich arenes

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Organic Chemistry Frontiers 2022年第3期9卷 816-821页

作者： Bin Wei Jing-Hao Qin Yong-Zheng Yang Ye-xiang xie Xuan-Hui Ouyang Ren-Jie Song Key Laboratory of Jiangxi Province for Persistent Pollutants Control and Resources Recycle Nanchang Hangkong UniversityNanchang 330063China

C(sp^(3))-H arylation has recently emerged as a powerful strategy involving new carbon-carbon bond formation for synthesizing complex organic *** herein describe an efficient electrochemical C(sp^(3))-H arylation of xanthenes with arenes proceeding via a radical pathway.A series of 9-aryl-9Hxanthenes were observed to have been produced in the presence of a carbon anode.

关键词： radical carbon herein

A new strategy to improve the sensitivity and selectivity of dopamine detection

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Science China Chemistry 2015年第5期58卷 892-898页

作者： xiang xie Jing Gu Wenbo Zhao Shujuan Liu Yonghui Qiao Xinyu Zhu Xiaohong Yin Zhiwei Zhu Meixian Li Yuanhua Shao Institute of Nuclear Chemistry and Physics China Academy of Engineering Physics Beijing National Laboratory for Molecular Sciences College of Chemistry and Molecular Engineering Peking University

We applied the combination of in situ electrochemical liquid-phase microextraction and square-wave voltammetric stripping analysis for the first time as a highly sensitive and selective approach for the detection of dopamine. A mixed gel of graphene sheets and an ionic liquid of 1-octyl-3-methylimidazolium hexaflurophosphate(OMim PF6) was used as a micro liquid-phase to pre-concentrate dopamine by controlled potential electrolysis from an aqueous solution(as a donor phase), followed by square-wave voltammetric stripping detection. Under optimized conditions, a linear calibration curve was obtained in the range of 0.05 to 1.0 ?mol/L in the presence of excess ascorbic acid and uric acid. The detection limit has been found to be 8.0 nmol/L(S/N=3).

关键词： dopamine detection graphene/OMimPF6 gel-modified electrode electrochemical microextraction square-wavevoltammetric stripping

A Novel Multichannel Audio Signal Compression Method Based on Tensor Representation and Decomposition

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China Communications 2014年第3期11卷 80-90页

作者： WANG Jing xie xiang KUANG Jingming School of Information Science and Technology Beijing Institute of Technology Beijing 100081 China

Multichannel audio signal is more difficult to be compressed than mono and stereo ones.A novel multichannel audio signal compression method based on tensor representation and decomposition is proposed in this *** multichannel audio is represented with 3-order tensor space and is decomposed into core tensor with three factor matrices in the way of channel,time and *** the truncated core tensor is transmitted which will be multiplied by the pre-trained factor matrices to reconstruct the original tensor *** and subjective experiments have been done to show a very noticeable compression capability with an acceptable output *** novelty of the proposed compression method is that it enables both high compression capability and backward compatibility with limited signal distortion to the hearing.

关键词： multichannel audio signal compression tensor decomposition Tuckermodel core tensor

Stabilization of Discrete-time 2-D T-S Fuzzy Systems Based on New Relaxed Conditions

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自动化学报 2010年第2期36卷 267-273页

作者： xie xiang-Peng ZHANG Hua-Guang Key Laboratory of Integrated Automation for the Process Industry Ministry of Education Shenyang 110004 P.R. China School of Information Science and Engineering Northeastern University Shenyang 110004 P.R. China

This paper is concerned with the problem of stabilization of the Roesser type discrete-time nonlinear 2-D system that plays an important role in many practical applications. First, a discrete-time 2-D T-S fuzzy model is proposed to represent the underlying nonlinear 2-D system. Second, new quadratic stabilization conditions are proposed by applying relaxed quadratic stabilization technique for 2-D case. Third, for sake of further reducing conservatism, new non-quadratic stabilization conditions are also proposed by applying a new parameter-dependent Lyapunov function, matrix transformation technique, and relaxed technique for the underlying discrete-time 2-D T-S fuzzy system. Finally, a numerical example is provided to illustrate the effectiveness of the proposed results.

关键词： Roesser model 2-D discrete systems Takagi-Sugeno (T-S) fuzzy model relaxed stabilization conditions

Study of Catalysts Based on High Surface Area MnO2 for Catalytic Combustion of CH4

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分子催化 1997年第5期 2-3页

作者： WANG xiang xie Youchang 1) (Department of Chemistry Peking University Beijing 100871)

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关键词： Catalytic combustion of CH 4 High surface area MnO 2 based catalysts