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Metamodel-based Global Optimization Using Fuzzy Clustering for Design Space Reduction

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Chinese Journal of Mechanical Engineering 2013年第5期26卷 928-939页

作者： li yulin liU li LONG Teng DONG Weili Key Laboratory of Dynamics and Control of Flight Vehicle of Ministry of Education School of Aerospace EngineeringBeijing Institute of Technology

High fidelity analysis are utilized in modern engineering design optimization problems which involve expensive black-box *** computation-intensive engineering design problems,efficient global optimization methods must be developed to relieve the computational burden.A new metamodel-based global optimization method using fuzzy clustering for design space reduction(MGO-FCR) is *** uniformly distributed initial sample points are generated by Latin hypercube design to construct the radial basis function metamodel,whose accuracy is improved with increasing number of sample points *** c-mean method and Gath-Geva clustering method are applied to divide the design space into several small interesting cluster spaces for low and high dimensional problems *** efficiency and accuracy are directly related to the design space,so unconcerned spaces are eliminated by the proposed reduction principle and two pseudo reduction *** reduction principle is developed to determine whether the current design space should be reduced and which space is *** first pseudo reduction algorithm improves the speed of clustering,while the second pseudo reduction algorithm ensures the design space to be *** several numerical benchmark functions,comparative studies with adaptive response surface method,approximated unimodal region elimination method and mode-pursuing sampling are carried *** optimization results reveal that this method captures the real global optimum for all the numerical benchmark *** the number of function evaluations show that the efficiency of this method is favorable especially for high dimensional *** on this global design optimization method,a design optimization of a lifting surface in high speed flow is carried out and this method saves about 10 h compared with genetic *** method possesses favorable performance on efficiency,robustness and capability of global

关键词： global optimization metamodel-based optimization reduction of design space fuzzy clustering

Supramolecular Wireframe DNA Polyhedra： Assembly and Applications

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Chinese Journal of Chemistry 2017年第6期35卷 801-810页

作者： yulin li Chengde Mao Zhaoxiang Deng School of Chemistry and Chemical Engineering Hefei University of Technology 193 Tunxi Road Hefei Anhui 230009 China Department of Chemistry Purdue University West Lafayette Indiana 47907 USA CAS Key Laboratory of Soft Matter Chemistry School of Chemistry and Materials Science University of Science and Technology of China Hefei Anhui 230026 China

Wireframe, polyhedral, supramolecular complexes made of DNA have uniform sizes, defined three-dimensional shapes, porous facets, hollow interiors, good biocompatibilities, and chemical functionalizability. They confer great potentials in bottom-up nanoengineering towards various applications. In this review, we summarize recent ad- vances in the rational design and programmed assembly of DNA wireframe polyhedra. Their assembly is based on three distinctively different strategies： individual strands-based assembly, tile-based assembly, and scaffolded DNA origami. Applications of these polyhedral structures in templated nanomaterial assembly and in-vivo cargo delivery are discussed. In the future, expanding the structural complexity and exploring their applications, especially in na- nomaterials science and biomedicines, should be a primary focus of this rapidly developing and evolving activity of structural DNA nanotechnology.

关键词： DNA nanotechnology supramolecule self-assembly wireframe polyhedron DNA tile

Reference tracking control for flexible air-breathing hypersonic vehicle with actuator delay and uncertainty

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Journal of Systems Engineering and Electronics 2011年第1期22卷 141-145页

作者： Hongyi li Yiming Cheng yulin Si Huijun Gao Institute of Intelligent Control and Systems Harbin Institute of Technology Harbin 150001 P. R. China

This paper considers the problem of reference tracking control for the flexible air-breathing hypersonic flight vehicle with actuator delay and *** constructing the Lyapunov functional including the lower and upper bounds of the time-varying delay,the non-fragile controller is designed such that the resulting closed-loop system is asymptotically stable and satisfies a prescribed performance cost *** simulation results are given to show the effectiveness of the proposed control method,which is validated by excellent output reference altitude and velocity tracking performance.

关键词： actuator delay flexible air-breathing hypersonic flight vehicle(FAHFV) non-fragile control output tracking control.

Nitrogen Content Inversion of Corn Leaf Data Based on Deep Neural Network Model

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Journal of Beijing Institute of Technology 2023年第5期32卷 619-630页

作者： yulin li Mengmeng Zhang Maofang Gao Xiaoming Xie Wei li College of Information Science and Technology Beijing University of Chemical TechnologyBeijing 100029China School of Information and Electronics Beijing Institute of TechnologyBeijing 100081China Institute of Agricultural Resources and Regional Planning Chinese Academy of Agricultural SciencesChina

To obtain excellent regression results under the condition of small sample hyperspectral data,a deep neural network with simulated annealing(SA-DNN)is *** to the characteristics of data,the attention mechanism was applied to make the network pay more attention to effective features,thereby improving the operating *** introducing an improved activation function,the data correlation was reduced based on increasing the operation rate,and the problem of over-fitting was *** introducing simulated annealing,the network chose the optimal learning rate by itself,which avoided falling into the local optimum to the greatest *** evaluate the performance of the SA-DNN,the coefficient of determination(R^(2)),root mean square error(RMSE),and other metrics were used to evaluate the *** results show that the performance of the SA-DNN is significantly better than other traditional methods.

关键词： precision agriculture deep neural network nitrogen content detection regression model

Analysis of Calcined Red Mud Properties and Related Mortar Performances

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Fluid Dynamics & Materials Processing 2024年第5期20卷 901-913页

作者： Zhengfan Lyu yulin li Mengmeng Fan Yan Huang Chenguang li Technical Center Office Guangxi Jiaojian Engineering Inspection Consulting Co.Ltd.Nanning530001China Technical Center Office Guangxi Road Construction Engineering Group Co.Ltd.Nanning530001China Nanning Road Construction Technology and Road Construction Materials Engineering Technology Research Centre Guangxi Road Construction Engineering Group Co.Ltd.Nanning530001China

Red mud(RM)is a low-activity industrial solid waste,and its utilization as a resource is currently a hot *** this study,the micro characteristics of red mud at different calcination temperatures were analyzed using X-ray diffraction and scanning electron *** performance of calcined red mud was determined through mortar strength *** indicate that high-temperature calcination can change the mineral composition and microstructure of red mud,and increase the surface roughness and specific surface *** the optimal temperature of 700°C,the addition of calcined red mud still leads to a decrease in mortar strength,but its activity index and flexural coefficient increase by 16.2%and 11.9%with respect to uncalcined red mud,reaching values of 0.826 and 0.974,*** with the control group,the synergistic activation of calcined red mud with slag can increase the compressive and flexural strength of the mortar by 12.9%and 1.5%,reaching 8.7 and 62.4 MPa,***,the activity index and flexural coefficient of the calcined RM and GGBS(Ground Granulated Blast furnace Slag)mixtures also increase to 1.015 and 1.130,respectively.

关键词： Red mud slag thermal activation synergistic activation mortar test microscopic properties

Comprehensive summary of solid oxide fuel cell control:a state-of-the-art review

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Protection and Control of Modern Power Systems 2022年第1期7卷 523-553页

作者： Bo Yang yulin li Jiale li Hongchun Shu Xinyu Zhao Yaxing Ren Qiang li Faculty of Electric Power Engineering Kunming University of Science and TechnologyKunming 650500China School of Management and Economics Kunming University of Science and TechnologyKunming 650500China Warwick Manufacturing Group University of WarwickCoventry CV47ALUK China Southern Power Grid EHV Transmission Company DaliChina.

Hydrogen energy is a promising renewable resource for the sustainable development of *** a key member of the fuel cell(FC)family,the solid oxide fuel cell(SOFC)has attracted a lot of attention because of characteristics such as having various sources as fuel and high energy conversion efficiency,and being *** is a highly coupled,nonlinear,and multivariable complex system,and thus it is very important to design an appropriate control strategy for an SOFC system to ensure its safe,reliable,and efficient *** paper undertakes a comprehen-sive review and detailed summary of the state-of-the-art control approaches of *** approaches are divided into eight categories of control:proportional integral differential(PID),adaptive(APC),robust,model predictive(MPC),fuzzy logic(FLC),fault-tolerant(FTC),intelligent and *** SOFC control approaches are carefully evalu-ated in terms of objective,design,application/scenario,robustness,complexity,and ***,five perspectives are proposed for future research directions.

关键词： Solid oxide fuel cell Control Hydrogen energy Artificial intelligence

Total synthesis of (±)-13-hydroxyneocembrene

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Chinese Science Bulletin 1998年第16期43卷 1403-1405页

作者： Yacheng Xing Wen Cen Ying li yulin li Department of Chemistry Qingdao University Qingdao China National Laboratory of Applied Organic Chemistry and Institute of Organic Chemistry Lanzhou University Lanzhou China

Analyzes the synthesis of hydroxyneocembrane as a cembrane-type diterpenoid isolated from soft coral. Use of 6-methyl-5-heptaen-2-one and geraniol as starting material through sixteen steps reaction; Spectral data of ... 详细信息

关键词： Total synthesis of hydroxyneocembrene li

Increasing rainfed wheat yield by optimizing agronomic practices to consume more subsoil water in the Loess Plateau

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The Crop Journal 2021年第6期9卷 1418-1427页

作者： Wenjia Yang Weijian liu yulin li Shiwen Wang lina Yin Xiping Deng State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau College of Natural Resources and EnvironmentNorthwest A&F UniversityYangling 712100ShaanxiChina College of life Sciences Northwest A&F UniversityYangling 712100ShaanxiChina Institute of Soil and Water Conservation Northwest A&F UniversityYangling 712100ShaanxiChina Institute of Soil and Water Conservation Chinese Academy of Sciences&Ministry of Water ResourcesYangling 712100ShaanxiChina

Erratic rainfall and misalignment between the rainy season and the growing season of winter wheat greatly limit rainfed winter wheat yield in the Loess Plateau of China. To increase the grain yield of winter wheat in this region, the effects of different agronomic practices, including adjusting planting pattern(NR, narrow row spacing), increasing seeding rate(high seeding rate, HS), decreasing basal nitrogen rate and increasing top-dressed nitrogen rate(DBN), and replacing an old cultivar with a new cultivar(NC) on wheat yield were investigated for two consecutive years. The results showed that the current grain yield of rainfed winter wheat in the Loess Plateau could be increased to 5879–7093 kg ha^(-1) by HS, DBN and NC practices relative to the practice of high-yielding farmers(PF). The increased yield due to HS, DBN and NC was attributed to the higher number of spikes ha^(-1), 1000-grain weight, and kernels spike^(-1). Before the flowering stage, HS increased soil water consumption(SWC) in 1–3 m subsoil due to the higher plant population compared with that of PF, whereas DBN decreased SWC in the 0–2 m soil layer compared with that of PF. After the flowering stage, HS, DBN, and NC increased SWC by 8–16 mm in 2–3 m subsoil compared to PF. The water use efficiency(WUE) was increased under DBN and NC in comparison with ***, the WUE did not increase under HS as it had the highest evapotranspiration among the five treatments. Increasing the use of subsoil water during the late growth stage by optimizing agronomic practices or applying new cultivars with expansive roots should be the primary approach to increase rainfed winter wheat yield in this region.

关键词： Winter wheat Agronomic practices Soil water consumption Grain yield Loess Plateau

CHD4-induced up-regulation of ERα activity contributes to breast cancer progression

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Genes & Diseases 2024年第3期11卷 132-135页

作者： Aman Sattout Xiaomin Yu Zhuo Sun Yanan li yulin li Shujing li Wei Huo Huijian Wu School of Bioengineering&Key Laboratory of Protein Modification and Disease Liaoning ProvinceDalian University of TechnologyDalianLiaoning 116024China Department of Oncology Central Hospital Affiliated with Dalian University of TechnologyDalianLiaoning 116089China

The estrogen signaling system is a crucial regulator of ***,abnormal activation of estrogen signaling may play a role in breast cancer initiation and *** to this pathway is the interaction between estrogen receptor alpha(ERa)and various co-transcription activators.1 Although numerous studies have investigated ER coregulators,the protein-protein interaction networks of ERa are not fully *** research has shown that high chromodomain helicase DNA-binding 4(CHD4)expression is linked to poor prognosis in various cancers.2,?In this study,we demonstrated that both CHD4 and ERαcontribute to breast cancer progression while providing evidence of the regulatory processes and functional interplay between these two proteins.

关键词： breast cancer ERα