检索结果-南通市图书馆

Tungsten 2024年第4期6卷 663-668页

作者： hai-Long liao Xiu-lin Wu Xiu-Juan Sun College of Chemistry Xiangtan UniversityXiangtan411105China Key Laboratory of Environmentally Friendly Chemistry and Applications of Ministry of Education Xiangtan UniversityXiangtan411105China

Clean hydrogen production based on pure water electrolysis has been considered a potential way to solve the energy crisis and serious environmental ***,the disadvantaged high reaction potential of anodic oxygen evolut... 详细信息

关键词： hydroxide layered disadvantage

Dynamic Distribution Adaptation Based Transfer Network for Cross Domain Bearing Fault Diagnosis

在线全文

学校读者我要写书评

暂无评论

Chinese Journal of Mechanical Engineering 2021年第3期34卷 94-103页

作者： Yixiao liao Ruyi Huang Jipu li Zhuyun Chen Weihua li School of Mechanical&Automotive Engineering South China University of TechnologyGuangzhou 510641China

In machinery fault diagnosis,labeled data are always difficult or even impossible to *** learning can leverage related fault diagnosis knowledge from fully labeled source domain to enhance the fault diagnosis performance in sparsely labeled or unlabeled target domain,which has been widely used for cross domain fault ***,existing methods focus on either marginal distribution adaptation(MDA)or conditional distribution adaptation(CDA).In practice,marginal and conditional distributions discrepancies both have significant but different influences on the domain *** this paper,a dynamic distribution adaptation based transfer network(DDATN)is proposed for cross domain bearing fault *** utilizes the proposed instance-weighted dynamic maximum mean discrepancy(IDMMD)for dynamic distribution adaptation(DDA),which can dynamically estimate the influences of marginal and conditional distribution and adapt target domain with source *** experimental evaluation on cross domain bearing fault diagnosis demonstrates that DDATN can outperformance the state-of-the-art cross domain fault diagnosis methods.

关键词： Cross domain fault diagnosis Dynamic distribution adaptation Instance-weighted dynamic MMD Transfer learning

Local Search-Based Anytime Algorithms for Continuous Distributed Constraint Optimization Problems

在线全文

学校读者我要写书评

暂无评论

IEEE/CAA Journal of Automatica Sinica 2025年第1期 288-290页

作者： Xin liao Khoi Hoang Xin Luo the College of Computer and Information Science Southwest University the Department of Computer Science and Engineering Washington University in St.Louis IEEE

Dear Editor,The distributed constraint optimization problems(DCOPs) [1]-[3]provide an efficient model for solving the cooperative problems of multi-agent systems, which has been successfully applied to model the real-world problems like the distributed scheduling [4], sensor network management [5], [6], multi-robot coordination [7], and smart grid [8]. However, DCOPs were not well suited to solve the problems with continuous variables and constraint cost in functional form, such as the target tracking sensor orientation [9], the air and ground cooperative surveillance [10], and the sensor network coverage [11].

关键词：

Fast implementation of kernel simplex volume analysis based on modified Cholesky factorization for endmember extraction

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Frontiers of Information Technology & Electronic Engineering 2016年第3期17卷 250-257页

作者： Jing li Xiao-run li li-jiao WANG liao-ying ZHAO College of Electrical Engineering Zhejiang University Institute of Computer Application Technology Hangzhou Dianzi University

Endmember extraction is a key step in the hyperspectral image analysis process. The kernel new simplex growing algorithm （KNSGA）, recently developed as a nonlinear alternative to the simplex growing algorithm （SGA）, has proven a promising endmember extraction technique. However, KNSGA still suffers from two issues limiting its application. First, its random initialization leads to inconsistency in final results; second, excessive computation is caused by the iterations of a simplex volume calculation. To solve the first issue, the spatial pixel purity index （SPPI） method is used in this study to extract the first endrnember, eliminating the initialization dependence. A novel approach tackles the second issue by initially using a modified Cholesky fac- torization to decompose the volume matrix into triangular matrices, in order to avoid directly computing the determinant tauto- logically in the simplex volume formula. Theoretical analysis and experiments on both simulated and real spectral data demonstrate that the proposed algorithm significantly reduces computational complexity, and runs faster than the original algorithm.

关键词： Endmember extraction Modified Cholesky factorization Spatial pixel purity index (SPPI) New simplex growingalgorithm (NSGA) Kernel new simplex growing algorithm (KNSGA)

On the dynamics of the gravitational lifting system in the deep sea mining industry

在线全文

学校读者我要写书评

暂无评论

Journal of Ocean Engineering and Science 2021年第4期6卷 400-404页

作者： Jing li Shijun liao State Key Laboratory of Ocean Engineering Shanghai 200240China School of Naval Architecture Ocean and Civil EngineeringShanghai Jiao Tong UniversityShanghai 200240China

The dynamics of the gravitational lifting system of the deep sea mining industry is demonstrated in this article.A simplified dynamic model is obtained when gravity,buoyancy and drag force are the major *** quantitative analysis,different variables like bucket size,distribution distance,and filling rate are considered to measure their influence on lifting speed and production rate,which ends up with that the most influential factor is the bucket size,and it has a positive correlation with both the two targets:lifting speed and production *** to the breaking strength of the cable wire rope,a feasible design of such a lifting system should take the tension force into ***,the feasibility is also examined and a conclusion is summarized that a combination of the bucket size and the distribution distance should be optimized according to the concrete working conditions.

关键词： Deep sea mining lifting system Dynamics lifting speed Production rate Cable tension

Solving Nonlinear Equations Systems with an Enhanced Reinforcement Learning Based Differential Evolution

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Complex System Modeling and Simulation 2022年第1期2卷 78-95页

作者： Zuowen liao Shuijia li Beibu Gulf Ocean Development Research Center Beibu Gulf UniversityQinzhou 535000China School of Computer Science China University of GeosciencesWuhan 430074China

Nonlinear equations systems(NESs)arise in a wide range of *** NESs requires the algorithm to locate multiple roots *** deal with NESs efficiently,this study presents an enhanced reinforcement learning based differential evolution with the following major characteristics:(1)the design of state function uses the information on the fitness alternation action;(2)different neighborhood sizes and mutation strategies are combined as optional actions;and(3)the unbalanced assignment method is adopted to change the reward value to select the optimal *** evaluate the performance of our approach,30 NESs test problems and 18 test instances with different features are selected as the test *** experimental results indicate that the proposed approach can improve the performance in solving NESs,and outperform several state-of-the-art methods.

关键词： nonlinear equations systems reinforcement learning differential evolution multiple roots location

Water’s motions in x–y and z directions of 2D nanochannels:Entirely different but tightly coupled

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Nano Research 2023年第5期16卷 6298-6307页

作者： Shouwei liao Qia Ke Yanying Wei libo li Guangdong Provincial Key Lab of Green Chemical Product Technology School of Chemistry&Chemical EngineeringSouth China University of TechnologyGuangzhou 510640China State Key Laboratory of Pulp and Paper Engineering South China University of TechnologyGuangzhou 510640China

Two-dimensional(2D)material-based membrane separation has attracted increasing attention due to its promising performance compared with traditional ***,in-depth understanding of water transportation behavior in such confined nanochannels is still lacking,which hinders the development of 2D nanosheets ***,we investigated water confined in graphene or MoS_(2)nanochannels by molecular dynamics(MD)simulations and found water’s diffusivity always varied linearly with their mean square displacement along z direction(Δz^(2))when system variables(e.g.,water molecules’number,channel height,nonbonded interaction parameter,harmonic potential constraining water’s z-coordinate)*** linear correlation applies to different water models and different force fields(FFs)of channel walls(e.g.,different Lennard–Jones parameters or even flexible FF),no matter whether water molecules form 3-,2-,or quasi-2-layer structure in the *** indicates,though water molecules’motion along z direction(z-fluctuation,confined within 1 nm)and that in xy plane(xydiffusion)are entirely different,they are tightly coupled:Violent z-fluctuation would produce more transient void to facilitate xydiffusion,which is to the sharp contrary of bulk water,where motions in x,y,z directions are symmetric,but *** work could help design high performance 2D nanochannels and discover more novel principles in nano-fluidics and membrane separation fields.

关键词： graphene membranes nanochannel nanofluidics water diffusion

An Optimal Control Strategy for Multi-UAVs Target Tracking and Cooperative Competition

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

IEEE/CAA Journal of Automatica Sinica 2021年第12期8卷 1931-1947页

作者： Yiguo Yang liefa liao Hong Yang Shuai li Jiangxi University of Science and Technology Ganzhou 341000China College of Engineering Swansea UniversitySwansea SA18ENUK

An optimal control strategy of winner-take-all(WTA)model is proposed for target tracking and cooperative competition of multi-UAVs(unmanned aerial vehicles).In this model,firstly,based on the artificial potential field method,the artificial potential field function is improved and the fuzzy control decision is designed to realize the trajectory tracking of dynamic ***,according to the finite-time convergence high-order differentiator,a double closed-loop UAV speed tracking the controller is designed to realize the speed control and tracking of the target tracking *** simulation results show that the designed speed tracking controller has the advantages of fast tracking,high precision,strong stability and avoiding ***,a cooperative competition scheme of multiple UAVs based on WTA is designed to find the minimum control energy from multiple UAVs and realize the optimal control *** analysis and numerical simulation results show that the model has the fast convergence,high control accuracy,strong stability and good robustness.

关键词： Artificial potential field(APF) fuzzy control higher-order differentiator optimal control strategy winner-take-all(WTA)

Pythagorean probabilistic hesitant triangular fuzzy aggregation operators with applications in multiple attribute decision making

在线全文

学校读者我要写书评

暂无评论

Journal of Systems Engineering and Electronics 2023年第2期34卷 422-438页

作者： liao Fuping li Wu liU Gang ZHOU Xiaoqiang School of Information Science and Engineering Hunan Institute of Science and TechnologyYueyang 414006China

As a generalization of fuzzy set,hesitant probabilistic fuzzy set and pythagorean triangular fuzzy set have their own unique advantages in describing decision *** modern socioeconomic decision-making problems are becoming more and more complex,it also becomes more and more difficult to appropriately depict decision makers’cognitive information in decision-making *** order to describe the decision information more comprehensively,we define a pythagorean probabilistic hesitant triangular fuzzy set(PPHTFS)by combining the pythagorean triangular fuzzy set and the probabilistic hesitant fuzzy ***,the basic operation and scoring function of the pythagorean probabilistic hesitant triangular fuzzy element(PPHTFE)are proposed,and the comparison rule of two PPHTFEs is ***,some pythagorean probabilistic hesitant triangular fuzzy aggregation operators are developed,and their properties are also ***,a multi-attribute decision-making(MADM)model is constructed based on the proposed operators under the pythagorean probabilistic hesitant triangular fuzzy information,and an illustration example is given to demonstrate the practicability and validity of the proposed decision-making method.

关键词： pythagorean probabilistic hesitant triangular fuzzy set(PPHTFS) aggregation operator multi-attribute decisionmaking(MADM)

Cooperative fault detection and recovery in the GNSS positioning of mobile agent swarms based on relative distance measurements

在线全文

学校读者我要写书评

暂无评论

Chinese Journal of Aeronautics 2022年第5期35卷 129-144页

作者： Qifeng CHEN Yunhe MENG Song li Yuxin liao School of Aeronautics and Astronautics Central South UniversityChangsha 410083China School of Physics and Astronomy Sun Yat-sen UniversityZhuhai 519082China

Relative measurements are exploited to cooperatively detect and recover faults in the positioning of Mobile Agent(MA)Swarms(MASs).First,a network vertex fault detection method based on edge testing is *** each edge,a property that has a functional relationship with the properties of its two vertices is measured and *** on the edge testing results of the network,the maximum likelihood principle is used to identify the vertex fault ***,an edge distance testing method based on the noncentral chi-square distribution is developed for detecting faults in the Global Navigation Satellite System(GNSS)positioning of ***,a recovery strategy for faults in the positioning of MASs based on distance measurement is *** effectiveness of the proposed methods is validated by a simulation case in which an MAS passes through a GNSS spoofing *** proposed methods are conducive to increasing the robustness of the positioning of MASs in complex *** main novelties include the following:(A)network vertex fault detection is based on concrete probability analysis rather than simple majority voting,and(B)the relation of detectability and recoverability of MAS positioning faults with the structure of the relative measurement network is first disclosed.

关键词： Fault detection and recovery Global Navigation Satellite System Mobile agents Network topology Positioning