检索结果-南通市图书馆

PID Neural Net work Decoupling Control Based on Hybrid Particle Swarm Optimization and Differential Evolution

在线全文

学校读者我要写书评

暂无评论

International Journal of Automation and computing 2020年第6期17卷 867-872页

作者： Hong-tao ye Zhen-Qiang Li School of Electrical and Information Engineering Guangxi University of Science and TechnologyLiuzhou 545006China Guangxi Key Laboratory of Automobile Components and Vehicle Technology Guangxi University of Science and TechnologyLiuzhou 545006China

For complex systems with high nonlinearity and strong coupling,the decoupling control technology based on proportion integration differentiation(PID)neural network(PIDNN)is used to eliminate the coupling between *** connection weights of the PIDNN are easy to fall into local optimum due to the use of the gradient descent learning *** order to solve this problem,a hybrid particle swarm optimization(PSO)and differential evolution(DE)algorithm(PSO-DE)is proposed for optimizing the connection weights of the *** DE algorithm is employed as an acceleration operation to help the swarm to get out of local optima traps in case that the optimal result has not been improved after several *** multivariable controlled plants with strong coupling between input and output pairs are employed to demonstrate the effectiveness of the proposed *** results show t hat the proposed met hod has better decoupling capabilities and control quality than the previous approaches.

关键词： Particle swarm optimization differential evolution proportion integration differentiation(PID)neural network hybrid approach decoupling control.

Research on throughput prediction of 5G network based on LSTM

在线全文

学校读者我要写书评

暂无评论

Intelligent and Converged Networks 2022年第2期3卷 217-227页

作者： Lanlan Li tao ye Purple Mountain Labs Nanjing 210000China China Communications Construction Second Harbor Engineering Company Ltd. Wuhan 430040China

This paper proposes a wireless network traffic prediction model based on long-term and short-term memory cyclic neural *** simulation experiments,the throughput prediction of 5G wireless networks using different scheduling algorithms for many different types of services is *** results verify that the long short-term memory prediction model has acceptable prediction accuracy and algorithm training speed,meets the needs of wireless network traffic prediction,and has a good application prospect.

关键词： wireless network flow forecast long short-term memory(LSTM) schedule throughput

Triple-Helix Structured Model Based on Problem-Knowledge-Solution Co-evolution for Innovative Product Design Process

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

Chinese Journal of Mechanical Engineering 2020年第6期33卷 49-63页

作者： Qian Hui Yan Li ye tao Hongwei Liu Innovation Method and Creative Design Key Laboratory of Sichuan Province Chengdu610065China School of Mechanical Engineering Sichuan UniversityChengdu610065China

A design problem with deficient information is generally described as wicked or *** information insufficiency leaves designers with loose settings,free environments,and a lack of strict boundaries,which provides them with more opportunities to facilitate ***,to capture the opportunity behind the uncertainty of a design problem,this study models an innovative design as a composite solving process,where the problem is clarified and resolved from fuzziness to satisfying solutions by interplay among design problems,knowledge,and ***,a triple-helix structured model for the innovative product design process is proposed based on the co-evolution of the problem,solution,and knowledge spaces,to provide designers with a distinct design strategy and method for innovative *** three spaces interact and co-evolve through iterative mappings,including problem structuring,knowledge expansion,and solution *** mappings carry the information processing and decision-making activities of the design,and create the path to satisfying ***,a case study of a reactor coolant flow distribution device is presented to demonstrate the practicability of this model and the method for innovative product design.

关键词： Innovative design Problem-knowledge-solution co-evolution Design activity Design process Product design

Synthesis and characterization of PMMA/Al_2O_3 composite particles by in situ emulsion polymerization

在线全文

学校读者我要写书评

暂无评论

Particuology 2008年第3期6卷 207-213页

作者： Hui Liu Hongqi ye Tianquan Lin tao Zhou College of Chemistry and Chemical Engineering Central South University Changsha 410083 China

In order to improve its dispersibility, superfine alumina （A1203） was encapsulated with poly（methyl methacrylate）（PMMA） by in situ emulsion polymerization. It was found that only when the concentration of sodium dodecyl sulfate （SDS） was much higher than its critical micelle concentration, could PMMA/Al2O3 composite particles with high percentage of grafting （PG） be prepared. The same results were obtained between the experimental and stoichiometric amounts of tris（dodecylbenzenesulfonate） isopropoxide （NDZ）, indicating that single-molecule-layer adsorption had taken place between NDZ and Al2O3. Analysis using FTIR, TEM and XPS showed that PMMA/Al2O3 composite particles with core-shell structure had been successfully synthesized by in situ emulsion polymerization. Compared to Al2O3, thermal stability and dispersibility of the composite particles showed marked improvement.

关键词： PMMA Alumina Composite particle Encapsulation Dispersibility

Continuous Separation of Multiple Size Microparticles using Alternating Current Dielectrophoresis in Microfluidic Device with Acupuncture Needle Electrodes

在线全文

学校读者我要写书评

暂无评论

Chinese Journal of Mechanical Engineering 2016年第2期29卷 325-331页

作者： tao ye REN Yukun YAN Hui JIANG Hongyuan School of Mechatronics Engineering Harbin Institute of Technology State Key Laboratory of Fluid Power Transmission and Control Zhejiang University

The need to continuously separate multiple microparticles is required for the recent development of lab-on-chip technology. Dielectrophoresis（DEP）-based separation device is extensively used in kinds of microfluidic applications. However, such conventional DEP-based device is relatively complicated and difficult for fabrication. A concise microfluidic device is presented for effective continuous separation of multiple size particle mixtures. A pair of acupuncture needle electrodes are creatively employed and embedded in a PDMS（poly-dimethylsiloxane） hurdle for generating non-uniform electric field thereby achieving a continuous DEP separation. The separation mechanism is that the incoming particle samples with different sizes experience different negative DEP（n DEP） forces and then they can be transported into different downstream outlets. The DEP characterizations of particles are calculated, and their trajectories are numerically predicted by considering the combined action of the incoming laminar flow and the n DEP force field for guiding the separation experiments. The device performance is verified by successfully separating a three-sized particle mixture, including polystyrene microspheres with diameters of 3 μm, 10 μm and 25 μm. The separation purity is below 70% when the flow rate ratio is less than 3.5 or more than 5.1, while the separation purity can be up to more than 90% when the flow rate ratio is between 3.5 and 5.1 and meanwhile ensure the voltage output falls in between 120 V and 150 V. Such simple DEP-based separation device has extensive applications in future microfluidic systems.

关键词： continuous separation of multiple size particles dielectrophoresis acupuncture needle electrodes microfluidic

Roles of soluble minerals in Cd sorption onto rice straw biochar

在线全文

学校读者我要写书评

暂无评论

Journal of Environmental Sciences 2022年第3期34卷 64-71页

作者： Ying-heng Fei Zuannan Zhang Zhuofeng ye Qihang Wu ye-tao Tang Tangfu Xiao School of Environment Science and Engineering Guangzhou UniversityGuangzhou 510006China School of Environment Science and Engineering Sun Yat-sen UniversityGuangzhou 510006China

Transforming to biochar provides an environmentally friendly approach for crop residue reutilization,which are usually applied as sorbent for heavy metal *** typical siliconrich material,the specific sorptive mechanisms of rice straw derived biochar(RSBC)are concerned,especially at the low concentration range which is more environmentally *** the present study,Cd sorption onto RSBCs at the concentration of ≤5 mg/L was *** sorptive capacity was positively correlated with the pyrolytic temperature of the biochar and the environmental pH *** soluble minerals of the RSBCs played the dominant roles in Cd sorption,contributing 29.2%,62.5%and 82.9%of the total sorption for RSBCs derived under 300℃,500℃and 700℃,*** number of cations,dominantly K^(+),were exchanged during the *** with cations and carbonates may also be contributive to the *** dissolution of silicon-containing minerals was found to be declined during sorption,suggesting its involvement in the sorption process,possibly through ***,the sparingly soluble silicate crystals may impose ignorable role in the *** with organic groups is only a minor mechanism in Cd sorption,compared to the much more dominant roles of the inorganic ashes.

关键词： Cadmium Sorption Rice straw Biochar Silicon-rich

Coordination and Cooperation are Essential: A Call for a Global Network to Enhance Integrated Human Health Risk Resilience Based on China’s COVID-19 Pandemic Coping Practice

在线全文

学校读者我要写书评

暂无评论

International Journal of Disaster Risk Science 2021年第4期12卷 593-599页

作者： yelin Sun Tian Liu tao ye Peijun Shi State Key Laboratory of Earth Surface Processes and Resource Ecology Beijing Normal UniversityBeijing100875China Academy of Plateau Science and Sustainability Qinghai Normal UniversityXining810008China Faculty of Geographical Science Beijing Normal UniversityBeijing100875China

More than a year after its appearance and still rampant around the world,the COVID-19 pandemic has highlighted tragically how poorly the world is prepared to handle systemic risks in an increasingly hyper-connected global social-ecological *** absence or clear inadequacy of global governance arrangements and mechanisms is painfully distinct and *** this short article,we summarize a set of COVID-19 pandemic-related analyses and lessons that are inspired by Chinese ***,strong government response is one of the most important methods to control a ***,countries should be concerned about human-to-frozen goods-to-human ***,sharing resources and experiences through cooperation is crucial to ensure an adequate health *** on these insights,we stress the critical importance of coordination and cooperation,and call for a global network to enhance integrated human health risk resilience.

关键词： COVID-19 Human-to-frozen goods-to-human transmission Government response Medical resources Coordination and cooperation

Variable selection for skew-normal mixture of joint location and scale models

在线全文

学校读者我要写书评

暂无评论

Applied Mathematics(A Journal of Chinese Universities) 2021年第4期36卷 475-491页

作者： WU Liu-cang YANG Song-qin tao ye Faculty of Science Kunming University of Science and TechnologyKunming 650093China School of Economics and Statistics Guangzhou UniversityGuangzhou 510006China

Although there are many papers on variable selection methods based on mean model in the nite mixture of regression models,little work has been done on how to select signi cant explanatory variables in the modeling of the variance *** this paper,we propose and study a novel class of models:a skew-normal mixture of joint location and scale models to analyze the heteroscedastic skew-normal data coming from a heterogeneous *** problem of variable selection for the proposed models is *** particular,a modi ed Expectation-Maximization(EM)algorithm for estimating the model parameters is *** consistency and the oracle property of the penalized estimators is *** studies are conducted to investigate the nite sample performance of the proposed *** example is illustrated by the proposed methodologies.

关键词： heterogeneous population skew-normal(SN)distribution mixture of joint location and scale models variable selection EM algorithm

Low-altitude small-sized object detection using lightweight feature-enhanced convolutional neural network

在线全文

学校读者我要写书评

暂无评论

Journal of Systems Engineering and Electronics 2021年第4期32卷 841-853页

作者： ye tao ZHAO Zongyang ZHANG Jun CHAI Xinghua ZHOU Fuqiang School of Mechanical and Electrical Information Engineering China University of Mining and Technology-BeijingBeijing 100083China The 54th Research Institute of China Electronics Technology Group Corporation Shijiazhuang 050081China School of Instrumentation Science and Opto-electronics Engineering Beihang UniversityBeijing 100083China

Unauthorized operations referred to as“black flights”of unmanned aerial vehicles(UAVs)pose a significant danger to public safety,and existing low-attitude object detection algorithms encounter difficulties in balancing detection precision and ***,their accuracy is insufficient,particularly for small objects in complex *** solve these problems,we propose a lightweight feature-enhanced convolutional neural network able to perform detection with high precision detection for low-attitude flying objects in real time to provide guidance information to suppress black-flying *** proposed network consists of three modules.A lightweight and stable feature extraction module is used to reduce the computational load and stably extract more low-level feature,an enhanced feature processing module significantly improves the feature extraction ability of the model,and an accurate detection module integrates low-level and advanced features to improve the multiscale detection accuracy in complex environments,particularly for small *** proposed method achieves a detection speed of 147 frames per second(FPS)and a mean average precision(mAP)of 90.97%for a dataset composed of flying objects,indicating its potential for low-altitude object ***,evaluation results based on microsoft common objects in context(MS COCO)indicate that the proposed method is also applicable to object detection in general.

关键词： unmanned aerial vehicle(UAV) deep learning lightweight network object detection low-attitude