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Fuzzy data envelopment analysis approach based on sample decision making units

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Journal of Systems Engineering and Electronics 2012年第3期23卷 399-407页

作者： Muren Zhanxin Ma wei cui School of Mathematical Sciences Inner Mongolia University Hohhot 010021 E R. China Department of Mathematics Inner Mongolia University of Technology Hohhot 010051 E R. China School of Economics and Management Inner Mongolia University Hohhot 010021 P. R. China

The conventional data envelopment analysis （DEA） measures the relative efficiencies of a set of decision making units with exact values of inputs and outputs. In real-world prob- lems, however, inputs and outputs typically have some levels of fuzziness. To analyze a decision making unit （DMU） with fuzzy input/output data, previous studies provided the fuzzy DEA model and proposed an associated evaluating approach. Nonetheless, numerous deficiencies must still be improved, including the α- cut approaches, types of fuzzy numbers, and ranking techniques. Moreover, a fuzzy sample DMU still cannot be evaluated for the Fuzzy DEA model. Therefore, this paper proposes a fuzzy DEA model based on sample decision making unit （FSDEA）. Five eval- uation approaches and the related algorithm and ranking methods are provided to test the fuzzy sample DMU of the FSDEA model. A numerical experiment is used to demonstrate and compare the results with those obtained using alternative approaches.

关键词： fuzzy mathematical programming sample decision making unit fuzzy data envelopment analysis efficiency α-cut.

Data-driven Seeing Prediction for Optics Telescope:from Statistical Modeling,Machine Learning to Deep Learning Techniques

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Research in Astronomy and Astrophysics 2022年第12期22卷 152-165页

作者： wei-Jian Ni Quan-Le Shen Qing-Tian Zeng Huai-Qing Wang Xiang-Qun cui tong Liu College of Computer Science and Engineering Shandong University of Science and TechnologyQingdao 266510China Nanjing Institute of Astronomical Optics&Technology National Astronomical ObservatoriesNanjing 210042China

Predicting seeing of astronomical observations can provide hints of the quality of optical imaging in the near future,and facilitate flexible scheduling of observation tasks to maximize the use of astronomical *** approaches to seeing prediction mostly rely on regional weather models to capture the in-dome optical turbulence *** to the developing of data gathering and aggregation facilities of astronomical observatories in recent years,data-driven approaches are becoming increasingly feasible and attractive to predict astronomical *** paper systematically investigates data-driven approaches to seeing prediction by leveraging various big data techniques,from traditional statistical modeling,machine learning to new emerging deep learning methods,on the monitoring data of the Large sky Area Multi-Object fiber Spectroscopic Telescope(LAMOST).The raw monitoring data are preprocessed to allow for big data *** we formulate the seeing prediction task under each type of modeling framework and develop seeing prediction models through using representative big data techniques,including ARIMA and Prophet for statistical modeling,MLP and XGBoost for machine learning,and LSTM,GRU and Transformer for deep *** perform empirical studies on the developed models with a variety of feature configurations,yielding notable insights into the applicability of big data techniques to the seeing prediction task.

关键词： methods:data analysis methods:statistical telescopes

An Improved Preisach Distribution Function Identification Method Considering the Reversible Magnetization

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CES Transactions on Electrical Machines and Systems 2023年第4期7卷 351-357页

作者： Long Chen Lvsheng cui tong Ben Libing Jing College of Electrical Engineering and New Energy China Three Gorges UniversityYichang443002China Hubei Provincial Engineering Technology Research Center for Power Transmission Line China Three Gorges UniversityYichang 443002China Hebei University of Technology Tianjin 300130China IEEE

This paper presents an identification method of the scalar Preisach model to consider the effect of reversible magnetization in the process of distribution function *** reconsidering the identification process by stripping the influence of reversible components from the measurement data,the Preisach distribution function is identified by the pure irreversible *** this way,the simulation accuracy of both limiting hysteresis loops and the inner internal symmetrical small hysteresis loop is ***,through a discrete Preisach plane with a hybrid discretization method,the irreversible magnetic flux density components are computed more efficiently through the improved Preisach ***,the proposed method results are compared with the traditional method and the traditional method considering reversible magnetization and validated by the laboratory test for the B30P105 electrical steel by Epstein frame.

关键词： Magnetic material Preisach distribution function Reversible magnetization Hybrid discretization method

Optical fiber FBG linear sensing systems for the on-line monitoring of airborne high temperature air duct leakage

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Chinese Physics B 2022年第8期31卷 410-417页

作者： Qinyu Wang Xinglin tong cui Zhang Chengwei Deng Siyu Xu Jingchuang wei School of Information Engineering Wuhan University of TechnologyWuhan 430070China National Engineering Laboratory for Fiber Optic Sensing Technology Wuhan University of TechnologyWuhan 430070China

Electrical sensing systems, such as those involving eutectic salt, are mostly used in connection to leakage from existing airborne high-temperature air-conducting pipelines. Such complex structured systems are susceptible to external interferences and, thus, cannot meet the increasingly strict monitoring needs of a complex air-conducting pipeline system of an aircraft. In view of this point, this paper studies an alternative sensor system based on a dense array fiber grating. To obtain a compact and light-weight airborne signal processing system, a field programmable gate array is used as the main control core that controls the output of the light source. The functions of pulse modulation, analog-to-digital conversion,data buffering and transmission are integrated into a single system, while the linear sensing monitoring is obtained by detecting the time-division and wavelength-division wavelength drift signals of the fiber Bragg grating array. Our experiments show that the spatial resolution of the linear sensing system approaches 5 cm, the temperature measurement accuracy reaches 2 ℃, the temperature measurement range is between 0–250 ℃, and the response time is within 4 s. Compared with the existing electrical monitoring systems, various monitoring indicators have been greatly improved and have broad application prospects.

关键词： gating array quasi-distributed measurement temperature monitoring prague grating miniaturization

Carbon nanotube integrated circuit technology:purification,assembly and integration

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International Journal of Extreme Manufacturing 2024年第3期6卷 120-138页

作者： Jianlei cui Fengqi wei Xuesong Mei State Key Laboratory for Manufacturing Systems Engineering Xi’an Jiaotong UniversityXi’an 710049People’s Republic of China

As the manufacturing process of silicon-based integrated circuits(ICs)approaches its physical limit,the quantum effect of silicon-based field-effect transistors(FETs)has become increasingly *** the burgeoning carbon-based semiconductor technology has become one of the most disruptive technologies in the post-Moore *** one-dimensional nanomaterials,carbon nanotubes(CNTs)are far superior to silicon at the same technology nodes of FETs because of their excellent electrical transport and scaling properties,rendering them the most competitive material in the next-generation ICs ***,certain challenges impede the industrialization of CNTs,particularly in terms of material preparation,which significantly hinders the development of CNT-based *** on CNT-based ICs technology,this review summarizes its main technical status,development trends,existing challenges,and future development directions.

关键词： carbon nanotubes integrated circuits field-effect transistors post-Moore

Lane Departure Assistance Coordinated Control System for In-Wheel Motor Drive Vehicles Based on Dynamic Extension Boundary Decision

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Journal of Systems Science & Complexity 2020年第4期33卷 1040-1063页

作者： WANG Hongbo cui wei YE Bin School of Automotive and Transportation Engineering Hefei University of TechnologyHefei 230009China Anhui Intelligent Vehicle Engineering Laboratory Hefei 230009China

Aiming at the advantages in active safety control of in-wheel motor drive vehicles, the classified decision-control-execution is proposed to the lane departure assistance system under the premise of ensuring the stability of the vehicle. The dynamic extension boundaries which vary with vehicle speed, road curvature and road adhesion coefficient are designed in the decision layer by using the neural network algorithm, which divides different dangerous degrees into different decision *** active differential steering controller, the electronic differential controller and their coordinated control strategy are designed in the control layer, and the corresponding control is carried out among different decision regions. In order to avoid the dangerous situation of secondary deviation caused by the existence of drift angle when the vehicle is rectified to the lane centerline, the heading angle controller is then designed in the control layer. The different torque distribution modes are divided according to the current vehicle speed, road adhesion coefficient and lateral acceleration in the execution layer, and the economic distribution, stability distribution, joint distribution are correspondingly executed among different torque distribution modes. Finally, Carsim and Matlab/Simulink are used for simulation verification.

关键词： execution Extension heading

A Novel Carrier Leakage Cancellation Algorithm for Multiple Target Detection

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Chinese Journal of Electronics 2019年第1期28卷 100-106页

作者： ZHOU Junwei SHEN Qing cui wei School of Information and Electronic Beijing institute of Technology

False alarms and misdetections caused by the carrier leakage problem attract increasing attention for resource-limited platforms. To tackle the problem, we propose a target protected carrier leakage cancellation algorithm to rebuild the leakage signal from reference cells with those cells randomly updated based on each detection result to exclude the targets. The proposed algorithm eliminates the carrier leakage effectively without introducing false target due to the non-involvement of the target information in the reference cells based on a random update strategy. The noise level of our proposed algorithm is less than that of the commonly used algorithms such as the Cell average constant false alarm rate(CA-CFAR)detection method. As verified in the simulations, the proposed algorithm performs better than the CA-CFAR method.

关键词： Carrier leakage Multiple target Target protected cancellation

IoV environment exploring coordination:A federated learning approach

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Digital Communications and Networks 2024年第1期10卷 135-141页

作者： tong Ding Lei Liu Yi Zhu Lizhen cui Zhongmin Yan School of Software Shandong UniversityJinan250101China

Exploring open fields with coordinated unmanned vehicles is popular in academia and *** of the most impressive applicable approaches is the Internet of Vehicles(lov).The IoV connects vehicles,road infrastructures and communication facilities to provide solutions for exploration ***,the coordination of acquiring information from multi-vehicles may risk data *** this end,sharing high-quality experiences instead of raw data has become an urgent *** paper employs a Deep Reinforcement Learning(DRL)method to enable IoVs to generate training data with prioritized experience and states,which can support the IoV to explore the environment more ***,a Federated Learning(FL)experience sharing model is established to guarantee the vehicles'*** numerical results show that the proposed method presents a better successful sharing rate and a more stable convergence within the comparison of fundamental *** experiments also suggest that the proposed method could support agents without full information to achieve the tasks.

关键词： Internet of vehicle Deep reinforcement learning Federated learning Data privacy

Brazing diamond grits onto AA7075 aluminium alloy substrate with Ag–Cu–Ti filler alloy by laser heating

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Chinese Journal of Aeronautics 2021年第6期34卷 67-78页

作者： Guoqin HUANG Yingda WANG Meiqin ZHANG Changcai cui Zhen tong Institute of Manufacturing Engineering Huaqiao UniversityXiamen 361021China Fujian Engineering Research Center of Intelligent Manufacturing for Britle Materials Xiamen 361021China National&Local Joint Engineering Research Centre for Intelligent Manufacturing Technology of Britle Material Products Huaqiao UniversityXiamen 361021China School of Mechanical and Automotive Engineering Xiamen University of TechnologyXiamen 361011China EPSRC Future Metrology Hub Centre for Precision TechnologiesUniversity of HuddersfieldHudersfield HDI 3DHUK

The brazing of diamond is a promising way to fabricate grinding wheels for efficient machining and precision *** work investigated the feasibility of bonding diamond grits onto Aluminium Alloy 7075(AA7075)substrate with a Ag–Cu–Ti filler alloy via laser fusion *** interfacial microstructures and the strength of the brazed diamond joints were *** cross-section of the brazed diamond joint consists of a molten filler alloy layer,a molten pool,a heat effect zone,a columnar crystal zone and an equiaxed crystal *** the interface of the filler alloy/substrate metal,microstructures observed possibly were Ag(s.s),Al(s.s),Tix Al,Al2 Cu and Mg intermetallic compounds.A layer of Ti C with a thickness of about 30–50 nm was found at the bonding interface of the diamond/filler *** averaged peak shear force of the brazed joints was found to be approximately 39.8 *** abrasion grinding test indicated that the diamond/AA7075 brazed joint was adequate for ***,the pulled-off of grit was found to be the primary failure of this type of brazed *** work broadened the brazing diamond technique and the range of applications of brazed diamond wheels for efficient grinding.

关键词： Ag–Cu–Ti filler alloy Aluminium alloy Brazing Diamond Fusion Interfacial microstructure Laser heating