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Active learning attraction basins of dynamical system

Chinese Physics B 2025年第5期34卷 115-122页

作者： Xiao-Wei Cao Xiao-Lei Ru Gang Yan MOE Key Laboratory of Advanced Micro-Structured Materials and School of Physical Science and EngineeringTongji UniversityShanghai 200092China National Key Laboratory of Autonomous Intelligent Unmanned Systems MOE Frontiers Science Center for Intelligent Autonomous Systemsand Shanghai Research Institute of Intelligence Science and TechnologyTongji UniversityShanghai 200092China

Dynamical systems often exhibit multiple attractors representing significantly different functioning conditions.A global map of attraction basins can offer valuable guidance for stabilizing or transitioning system *** a map can be constructed without prior system knowledge by identifying attractors across a sufficient number of points in the state ***,determining the attractor for each initial state can be a laborious ***,we tackle the challenge of reconstructing attraction basins using as few initial points as *** each iteration of our approach,informative points are selected through random seeding and are driven along the current classification boundary,promoting the eventual selection of points that are both diverse and *** results across various experimental dynamical systems demonstrate that our approach requires fewer points than baseline methods while achieving comparable mapping ***,the reconstructed map allows us to accurately estimate the minimum escape distance required to transition the system state to a target basin.

关键词： complex system attraction basin active learning

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Improved Manta Ray Foraging Optimizer-based SVM for Feature Selection Problems:A Medical Case Study

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Journal of Bionic Engineering 2024年第1期21卷 409-425页

作者： Adel Got Djaafar Zouache Abdelouahab Moussaoui Laith Abualigah Ahmed Alsayat Faculty of informatics University of Science and Technology Houari BoumedieneAlgiersAlgeria LRIA Laboratory University of Science and Technology Houari BoumedieneAlgiersAlgeria Computer Science Department University of Mohamed El Bachir El IbrahimiBordj Bou ArreridjAlgeria Computer Science Department University of Ferhat AbbasSetifAlgeria Computer Science Department Prince Hussein Bin Abdullah Faculty for Information TechnologyAl al-Bayt UniversityMafraq 25113Jordan Department of Computer Science College of Computer and Information SciencesJouf UniversityJoufSaudi Arabia Department of Electrical and Computer Engineering Lebanese American University13-5053ByblosLebanon Hourani Center for Applied Scientific Research Al-Ahliyya Amman UniversityAmman 19328Jordan MEU Research Unit Middle East UniversityAmman 11831Jordan Applied science research center Applied science private universityAmman 11931Jordan School of Computer Sciences Universiti Sains Malaysia11800 PenangMalaysia School of Engineering and Technology Sunway University Malaysia27500 Petaling JayaMalaysia

Support Vector Machine(SVM)has become one of the traditional machine learning algorithms the most used in prediction and classification ***,its behavior strongly depends on some parameters,making tuning these parameters a sensitive step to maintain a good *** the other hand,and as any other classifier,the performance of SVM is also affected by the input set of features used to build the learning model,which makes the selection of relevant features an important task not only to preserve a good classification accuracy but also to reduce the dimensionality of *** this paper,the MRFO+SVM algorithm is introduced by investigating the recent manta ray foraging optimizer to fine-tune the SVM parameters and identify the optimal feature subset *** proposed approach is validated and compared with four SVM-based algorithms over eight benchmarking ***,it is applied to a disease Covid-19 *** experimental results show the high ability of the proposed algorithm to find the appropriate SVM’s parameters,and its acceptable performance to deal with feature selection problem.

关键词： Support vector machine Parameters tuning Feature selection Bioinspired algorithms Manta ray foraging optimizer

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Leveraging Janus Substrates as a Confined“Interfacial Reactor”to Synthesize Ultrapermeable Polyamide Nanofilms

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research 2024年第4期2024卷 749-758页

作者： Cheng-Ye Zhu Hao-Nan Li Bian-Bian Guo Yu Fang Chang Liu Hao-Cheng Yang Chao Zhang Hong-Qing Liang Zhi-Kang Xu MOE Engineering Research Center of Membrane and Water Treatment Technology and Key Lab of Adsorption and Separation Materials&Technologies of Zhejiang ProvinceDepartment of Polymer Science and EngineeringZhejiang UniversityHangzhou 310058China The“Belt and Road”Sino-Portugal Joint Lab on Advanced Materials International Research Center for X PolymersZhejiang UniversityHangzhou 310058China

Porous substrates act as open“interfacial reactors”during the synthesis of polyamide composite membranes via interfacial ***,achieving a thin and dense polyamide nanofilm with high permeance and selectivity is challenging when using a conventional substrate with uniform *** overcome this limitation,we propose the use of Janus porous substrates as confined interfacial reactors to decouple the local monomer concentration from the total monomer amount during interfacial polymerization.

关键词： interfacial monomer overcome

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Punicalagin alleviates hypercholesterolemia in mice through modulating farnesoid X receptor signaling and modulating gut microbiota

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Food science and Human Wellness 2025年第1期14卷 175-189页

作者： Huanhuan Liu Hongli Liu Chunhong Yan Jiaxiu Liu Yu Cao Guopeng Li Xiaodong Xia State Key Laboratory of Marine Food Processing and Safety Control National Engineering Research Center of SeafoodSchool of Food Science and TechnologyDalian Polytechnic UniversityDalian 116034China Beijing Advanced Innovation Center for Food Nutrition and Human Health College of Food Science and Nutritional EngineeringChina Agricultural UniversityBeijing 100083China

Punicalagin has been demonstrated to exhibit anti-oxidant and anti-inflammatory properties,but whether and how it could impact hypercholesterolemia remains not fully *** aim of this study was to investigate the influence of punicalagin on hypercholesterolemia in mice and its related *** 6 weeks'intervention,punicalagin significantly reduced serum total cholesterol and low-density lipoprotein cholesterol(LDL-C)levels in mice fed a high-fat high-cholesterol(HFHC)***,punicalagin supplementation lowered hepatic cholesterol level,which corresponded to the down-regulation of cholesterol synthesis genes(Fdps,Cyp51)and up-regulated bile acid synthesis genes(Cyp7a1,Cyp27a1).In addition,bile acid reabsorption was retarded in punicalagin-fed mice through down-regulating ileal apical sodium-dependent BA transporter(ASBT).Furthermore,intestinal farnesoid X receptor(FXR)-fibroblast growth factor 15(Fgf15)pathway was inhibited while hepatic FXR-small heterodimeric partner(SHP)pathway was activated in punicalagin *** analysis and targeted metabolomics showed that punicalagin decreased the abundance of bile-salt hydrolase(BSH)-producing bacteria(Clostridiaceae and Bifidobacteriaceae)and the ratio of primary BAs to secondary *** conclusion,the cholesterol-lowering effect of punicalagin partly through down-regulating cholesterol synthesis and increasing cholesterol catabolism,which could be achieved by regulating gut microbiota,altering bile acid composition and modulating FXR signaling *** findings indicate the potential application of punicalagin-related products as an alternative strategy for hypercholesterolemia prevention and mitigation.

关键词： Punicalagin Hypercholesterolemia Farnesoid X receptor Bile acid metabolism Gut microbiota

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Spin-polarized saddle points in the topological surface states of elemental bismuth revealed by pump-probe spin- and angle-resolved photoemission spectroscopy

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Physical Review B 2024年第4期110卷 L041401-L041401页

作者： Yuto Fukushima Kaishu Kawaguchi Kenta Kuroda Masayuki Ochi Motoaki Hirayama Ryo Mori Hiroaki Tanaka Ayumi Harasawa Takushi Iimori Zhigang Zhao Shuntaro Tani Koichiro Yaji Shik Shin Fumio Komori Yohei Kobayashi Takeshi Kondo Institute for Solid State Physics Graduate School of Advanced Science and Engineering International Institute for Sustainability with Knotted Chiral Meta Matter (WPI-SKCM²) Research Institute for Semiconductor Engineering Hiroshima University Higashi-Hiroshima Hiroshima 739-8527 Japan Department of Physics Forefront Research Center Department of Applied Physics (CEMS) Wako Saitama 351-0198 Japan School of Information Science and Engineering Center for Basic Research on Materials Office of University Professor Trans-scale Quantum Science Institute

We use pump-probe, spin- and angle-resolved photoemission spectroscopy (ARPES) with a 10.7 eV laser accessible up to the Brillouin zone edge, and reveal the entire band structure around the Fermi level, including the unoccupied side, for the elemental bismuth (Bi) with the spin-polarized surface states. Our data identify Bi as in a strong topological insulator phase (Z2=1) against the prediction of most band calculations. We unveil that the unoccupied topological surface states possess spin-polarized saddle points yielding the van Hove singularity. The unique feature provides an excellent platform for the future development of optospintronics.

关键词： Electronic structure Spin polarization Topological materials Photoemission

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High Peak-power Pulse Compression via an Antiresonant Hollow-core Fiber

High Peak-power Pulse Compression via an Antiresonant Hollow...

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2024 Asia Communications and Photonics Conference, ACP 2024 and International Conference on Information Photonics and Optical Communications, IPOC 2024

作者： Wang, Shan Zhang, Xin Zhuang, Ziheng Luo, Weija Lin, Di Li, Jianping Fu, Songnian Wang, Pu Qin, Yuwen Institute of Advanced Photonics Technology School of Information Engineering Guangdong University of Technology Guangzhou China Institute of Laser Engineering Beijing Engineering Research Center of Laser Applied Technology BeijingUniversity of Technology Beijing China

We report the successful compression of high-energy, linearly chirped picosecond pulses through an optimally lengthened anti-resonant hollow-core fiber, achieving sub-40-fs de-chirped pulses with peak powers of 10 MW.... 详细信息

ISBN: (纸本)9798350379266

关键词： Pulse compression

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Intelligent Process Accuracy Evaluation and Analysis System for Hot Strip Rolling 42

Intelligent Process Accuracy Evaluation and Analysis System ...

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42nd Chinese Control Conference, CCC 2023

作者： Jing, Fengwei Feng, Zhanbiao Liu, Hengwen Li, Jie Song, Yong University of Science and Technology Beijing Department of National Engineering Research Center for Advanced Rolling Technology Beijing100083 China

ISBN: (纸本)9789887581543

Automated hot strip rolling is inextricably linked to stable equipment operation and the assurance of equipment accuracy. The iron and steel industry has practiced equipment management, spot inspections and maintenance, and remote operation and maintenance in a lot of detail, and realized the importance of equipment management. The status of equipment and its accuracy are subject to a number of factors that can change at any time. Detecting the hidden trouble of equipment failure in production and changing trends in accuracy is a difficult problem for industries. The purpose of this paper is to establish an intelligent system for evaluating and analyzing hot strip rolling equipment from a production technology perspective. Model building and specific function application of plate and strip equipment accuracy, and the construction process and practical application of the system were discussed. © 2023 Technical Committee on Control Theory, Chinese Association of Automation.

关键词： Hot rolling

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The hydrogen storage performance and catalytic mechanism of theMgH_(2)-MoS_(2)composite

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Journal of Magnesium and Alloys 2023年第7期11卷 2530-2540页

作者： Luxiang Wang Yiwanting Hu Jiayu Lin Haiyan Leng Chenghua Sun Chengzhang Wu Qian Li Fusheng Pan State Key Laboratory of Advanced Special Steel&Shanghai Key Laboratory of Advanced Ferrometallurgy&School of Materials Science and Engineering Shanghai UniversityShanghai 200444China Centre for Translational Atomaterials Faculty of ScienceEngineering and TechnologySwinburne University of TechnologyHawthornVictoria 3122Australia National Engineering Research Center for Magnesium Alloys College of Materials Science and EngineeringChongqing UniversityChongqing 400044China

In this work,we synthesized MoS_(2)catalyst via one-step hydrothermal method,and systematically investigated the catalytic effect of MoS_(2)on the hydrogen storage properties of MgH_(2).The MgH_(2)-5MoS_(2)composite milled for 5 h starts to release hydrogen at 259℃.Furthermore,it can desorb 4.0 wt.%hydrogen within 20 min at 280℃,and absorb 4.5 wt.%hydrogen within 5 min at 200℃.Mo and MoS_(2)coexistedin the ball milled sample,whereas only Mo was kept in the sample after dehydrogenation and rehydrogenation,which greatly weakens theMg-H bonds and facilitates the dissociation of MgH_(2)on the surface of Mo(110).The comparative study show that the formed MgS has nocatalytic effect for MgH_(2).We believed that the evolution and the catalytic mechanism of MoS_(2)will provide the theoretical guidance for theapplication of metal sulfide in hydrogen storage materials.

关键词： Hydrogen storage Magnesium hydride MoS_(2) Evolution Catalytic mechanism

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Tunable zinc benzamidinate complexes: coordination modes and catalytic activity in the ring-opening polymerization of l-lactide

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Dalton Transactions 2024年第16期53卷 7229-7238页

作者： Chang, Chen-Chieh Chen, Ming-Tsz Huang, Tzu-Lun Chen, Chi-Tien Department of Chemistry National Chung Hsing University Taiwan Taichung402 Taiwan Department of Applied Chemistry Providence University Taichung43301 Taiwan i-Center for Advanced Science and Technology National Chung Hsing University Taichung402 Taiwan

Seven asymmetric zinc benzamidinate complexes featuring or lacking side-arm functionalities were synthesized. Using equimolar zinc reagent produced distinct dinuclear motifs [(C6H5-C = NC6H5)ZnEt]2 (R = tBu, 1;(CH2)2OMe, 2;(CH2)2NMe2, 3). Half the zinc reagent yielded dinuclear [(C6H5-C = NC6H5)2Zn]2 (R = tBu, 4) or mononuclear zinc bis(chelate) complexes (R = (CH2)2OMe, 5;(CH2)2NMe2, 6;CH2Py, 7). Molecular structures of 1-4 and 7 were determined via single-crystal X-ray diffraction. Altering benzamidinate substituents modifies both coordination modes and catalytic activities in ring-opening polymerization of l-lactide. Specifically, complex 7 exhibits enhanced catalytic activity at 25 °C using 100 equivalents of l-lactide with a turnover frequency of 1820 h−1 © 2024 The Royal Society of Chemistry

关键词： Ring opening polymerization

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Cryo-EM structure of a minimal reaction center–light-harvesting complex from the phototrophic bacterium Chloroflexus aurantiacus

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Journal of Integrative Plant Biology 2025年第4期 967-978页

作者： Guoqiang Huang Shishang Dong Lin Ma Lin Li Jinxin Ju Mei-Jiao Wang Jian-Ping Zhang Sen-Fang Sui Xiaochun Qin State Key Laboratory of Membrane Biology Beijing Advanced Innovation Center for Structural Biology School of Life SciencesTsinghua University Multiscale Research Institute of Complex Systems Fudan University School of Biological Science and Technology University of Jinan School of Chemistry and Life Resources Renmin University of China School of Life Sciences Southern University of Science and Technology

Photosynthetic organisms have developed various light-harvesting antenna systems to capture light and transfer energy to reaction centers（RCs）.Simultaneous utilization of the integral membrane light-harvesting antenna（LH complex） and the extrinsic antenna（chlorosomes） makes the phototrophic bacterium Chloroflexus（Cfx.） aurantiacus an ideal model for studying filamentous anoxygenic phototrophs（FAPs）. Here, we determined the structure of a minimal RC–LH photocomplex from Cfx. aurantiacus J-10-fl（CaRC–LH） at 3.05-? resolution. The CaRC–LH binds only to seven LH subunits, which form a crescent-shaped antenna surrounding the movable menaquinone-10（QB）binding site of Ca RC. In this complex with minimal LH units, an extra antenna is required to ensure sufficient light-gathering, providing a clear explanation for the presence of chlorosomes in Cfx. aurantiacus. More importantly, the semicircle of the antenna represents a novel RC–LH assembly pattern. Our structure provides a basis for understanding the existence of chlorosomes in *** and the possible assembly pattern of RC–LH.

关键词： Chloroflexus aurantiacus chlorosomes electron transfer photosynthesis RC–LH

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