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Distributed regularized online optimization using forward-backward splitting

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Control Theory and Technology 2023年第2期21卷 212-221页

作者： Deming Yuan Baoyong Zhang Shengyuan Xu huanyu zhao School of Automation Nanjing University of Science and TechnologyNanjing 210094China Faculty of Automation Huaiyin Institute of TechnologyHuai'an 223003China

This paper considers the problem of distributed online regularized optimization over a network that consists of multiple interacting *** node is endowed with a sequence of loss functions that are time-varying and a regularization function that is fixed over time.A distributed forward-backward splitting algorithm is proposed for solving this problem and both fixed and adaptive learning rates are *** both cases,we show that the regret upper bounds scale as O(VT),where T is the time *** particular,those rates match the centralized ***,we show the effectiveness of the proposed algorithms over an online distributed regularized linear regression problem.

关键词： Distributed online optimization Regularized online learning Regret Forward-backward splitting

PHONONIC BAND GAPS IN TWO-DIMENSIONAL HYBRID TRIANGULAR LATTICE

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Acta Mechanica Solida Sinica 2010年第3期23卷 255-259页

作者： Bin Wu Ruiju Wei huanyu zhao Cunfu He College of Mechanical Engineering and Applied Electronics Technology Beijing University of Technology Beijing 100124 China College of Mathematics and Physics Shandong Jianzhu University Jinan 250101 China

Absolute phononic band gaps can be substantially improved in two-dimensional lattices by using a symmetry reduction approach. In this paper, the propagation of elastic waves in a two-dirnensional hybrid triangular lattice structure consisting of stainless steel cylinders in air is investigated theoretically. The band structure is calculated with the plane wave expansion （PWE） method. The hybrid triangular Bravais lattice is formed by two kinds of triangular lattices. Different from ordinary triangular lattices, the band gap opens at low frequency （between the first and the second bands） regime because of lifting the bands degeneracy at high symmetry points of the Brillouin zone. The location and width of the band gaps can be tuned by the position of the additional rods.

关键词： phononic crystal phononic band gap hybrid triangular lattice plane wave expansion method

Durable Design of Superhydrophobic Coatings with TiO_(2)Particles and Al_(2)O_(3)Whiskers for the Enhanced Anti-icing Performance

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Journal of Bionic Engineering 2024年第3期21卷 1360-1374页

作者： Weilan Liu Kunlong Li Yizhou Shen huanyu zhao Yaru Ni Zeyu Cai Lingfeng zhao Zhen Wang Institute of Advanced Materials(IAM) School of Materials Science and EngineeringNanjing Tech UniversityNanjing211816China College of Materials Science and Technology Nanjing University of Aeronautics and AstronauticsNanjing211100China Aviation Industry Aerodynamics Research Institute of China Shenyang110000China

Superhydrophobic coatings with high non-wetting properties are widely applied in anti-icing ***,the micro-nanostructures on the surfaces of superhydrophobic coatings are fragile under external forces,resulting in reduced ***,mechanical strength and durability play a crucial role in the utilization of superhydrophobic *** this study,we employed a two-step spraying method to fabricate superhydrophobic FEVE-based coatings with exceptional mechanical durability,utilizing fluorinated TiO_(2)nanoparticles and fluorinated Al_(2)O_(3)microwhiskers as the *** composite coating exhibited commendable non-wetting properties,displaying a contact angle of 164.84°and a sliding angle of 4.3°.On this basis,the stability of coatings was significantly improved due to the interlocking effect of Al_(2)O_(3)*** 500 tape peeling cycles,500 sandpaper abrasion tests,and 50 kg falling sand impact tests,the coatings retained superhydrophobicity,exhibiting excellent durability and application ***,the ice adhesion strength on the coatings was measured at only 65.4 kPa,while the icing delay time reached 271.8 s at-15℃.In addition,throughout 500 freezing/melting cycles,statistical analysis revealed that the superhydrophobic coatings exhibited a freezing initiation temperature as low as-17.25℃.

关键词： Superhydrophobic coatings Anti-icing Mechanical durability

Event-based control strategy on consensus of multi-agent systems with estimated combinational measurements 36

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Event-based control strategy on consensus of multi-agent sys...

Hub genes associated with immune cell infiltration in breast cancer, identified through bioinformatic analyses of multiple datasets

第36届中国控制会议

作者： Duosi Xie Jianquan Xie huanyu zhao College of Information Science and Technology Central South University Research Institute of Information Security Hunan University of Finance and Economics Faculty of Electronic and Electrical Engineering Huaiyin Institute of Technology

ISBN: (纸本)9781538629185

This paper studies the consensus problem of a first-order multi-agent system by using event-based *** each agent,both of the control law and the triggering function utilize estimated combinational measurement,which is calculated based on the combinational measurement that sampled at the agent’s event *** distributed triggering function is developed to compute these *** when an event occurs,will the agent samples its neighbors’ state to gather the combinational measurement and use it to update the control *** multi-agent system is guaranteed to reach consensus under the eventtriggered control ***,the inter-event interval has a positive lower ***,a numerical simulation is given to illustrate the effectiveness of the proposed control strategy.

关键词： Event-based strategy Multi-agent systems Consensus Combinational measurement Distributed control

来源： cnki会议评论

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Cancer Biology & Medicine 2022年第9期19卷 1352-1374页

作者： huanyu zhao Ruoyu Dang Yipan Zhu Baijian Qu Yasra Sayyed Ying Wen Xicheng Liu Jianping Lin Luyuan Li State Key Laboratory of Medicinal Chemical Biology and College of Pharmacy Tianjin Key Laboratory of Molecular Drug ResearchNankai UniversityTianjin 300350China Department of Physiology and Pathophysiology School of Basic Medical SciencesCapital Medical UniversityBeijing 100069China

Objective:The aim of this study was to identify hub genes associated with immune cell infiltration in breast cancer through bioinformatic analyses of multiple ***:Nonparametric(NOISeq)and robust rank aggregation-ranked parametric(EdgeR)methods were used to assess robust differentially expressed genes across multiple ***-protein interaction network,GO,KEGG enrichment,and subnetwork analyses were performed to identify immune-associated hub genes in breast *** cell infiltration was evaluated with the CIBERSORT,XCELL,and TIMER *** association between the hub gene-based risk signature and survival was determined through Kaplan–Meier survival analysis,multivariate Cox analysis,and a nomogram with external ***:We identified 163 robust differentially expressed genes in breast cancer through applying both nonparametric and parametric methods to multiple GEO(n=2,212)and TCGA(n=1,045)*** bioinformatic analyses further identified 10 hub genes:CXCL10,CXCL9,CXCL11,SPP1,POSTN,MMP9,DPT,COL1A1,ADAMDEC1,and *** 10 hub-gene-based risk signature significantly correlated with the prognosis of patients with breast ***,these hub genes were strongly associated with the extent of infiltration of CD4+T cells,CD8+T cells,neutrophils,macrophages,and myeloid dendritic cells into breast ***:Integrated analyses of multiple databases led to the discovery of 10 robust hub genes that together may serve as a risk factor characteristic of the immune microenvironment in breast cancer.

关键词： Bioinformatics breast cancer multi-datasets analysis immune cell infiltration survival analysis

Synthesis and characterization of CoS ball in cage structures

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Science China Chemistry 2013年第4期56卷 475-480页

作者： CHEN Xu MEI Jie QIN ZhiYong SONG LingLing ZHANG XiaoBo LI XiaoYun BAO HaiFeng SHI JianJun zhao huanyu Department of Physics Center for Optoelectronics Materials and Devices Key Laboratory of Advanced Textile Materials and Manufacturing Technology Ministry of Education Zhejiang Sci-Tech University School of Biotechnology and Chemical Engineering Taizhou College of Nanjing Normal University Department of Chemistry and Chemical Engineering Hangzhou Normal University

Ball in cage structures of cobalt sulfide have been successfully prepared by a facile one-pot hydrothermal synthesis approach employing Co（NO3）2＇6H20 as the cobalt source and S=C（NH2）2 as the sulfur source. The effects of the reaction parameters （volume ratio of distilled water to ethanol, reaction time and reaction temperature） on the morphology and size of the CoS structures were investigated. The synthesized product was characterized by X-ray diffraction, scanning electron microscopy and transmission electron microscopy. It has been confirmed that the volume ratio of distilled water to ethanol played a key role in the formation of the ball in cage structures, and the formation mechanism of the CoS ball in cage structures was also proposed. The electrochemical capacitance performances of the CoS products were studied, and the CoS ball in cage structures show excellent energy storage characteristics.

关键词： cobalt sulfide ball-in-cage structure synthesis characterization

Coordinated Suppression Method of Fault Current for DC Grid with Novel Dissipative Resistors Topology

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CSEE Journal of Power and Energy Systems 2024年第6期10卷 2371-2383页

作者： Shouqi Jiang huanyu zhao Guoqing Li Yechun Xin Lixin Wang Weiru Wang Key Laboratory of Modern Power System Simulation and Control & Renewable Energy Technology Ministry of Education Northeast Electric Power University Jilin China

A DC grid based on half-bridge modular multilevel converters (HB-MMC) is a feasible means to realize the friendly grid connection of renewable energy. To solve problems such as the high cost and technical difficulty of DC circuit breakers (DCCB), a coordinated control method for fault current suppression of DC grid connecting wind power is proposed. The key influencing factors of DC fault current are revealed by fault characteristics analysis, and an adaptive current-limiting control method for MMC is proposed, whose parameter selection principles are designed to ensure the safe operation of equipment while achieving effective suppression of fault current. In addition, a novel configuration method of dissipative resistors with the current-limiting function is proposed, which can solve the problem of surplus power in the DC grid and reduce the current stress of converter valves. Based on this, a coordination scheme of dissipative resistors, the adaptive current-limiting control method, and DCCBs are proposed to block fault current, effectively reducing the manufacturing difficulty and cost of DCCB. Finally, a four-terminal DC grid simulation model is built based on the RTLAB OP5600 real-time digital simulation platform, and the effectiveness and feasibility of the proposed methods are verified.

关键词： Resistors Circuit faults Voltage control Fault currents Reliability Inductors Wind farms

Controlling the Chain Folding for the Synthesis of Single-Chain Polymer Nanoparticles Using Thermoresponsive Polymers

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CCS Chemistry 2021年第8期3卷 2143-2154页

作者： He Zhang Liang Zhang Jichun You Niboqia Zhang Linxiuzi Yu huanyu zhao Hu-Jun Qian Zhong-Yuan Lu State Key Laboratory of Supramolecular Structure and Materials Institute of Theoretical ChemistryJilin UniversityChangchun 130012 College of Material Chemistryand Chemical EngineeringHangzhou Normal UniversityHangzhou 311121

Synthetic polymer single-chain nanoparticles(SCNPs)are an emerging new class of nanomaterials that possess similar folded structures as natural ***,most SCNPs reported so far are packed loosely in their interior,resembling those of intrinsically disordered proteins(IDPs).Here,we report a facile strategy to synthesize SCNPs with controllable folding in aqueous solution.

关键词： single-chain nanoparticle controllable intramolecular folding thermoresponsive photocross-linking molecular dynamics simulation intelligent response polymer

（32.4.3.4）晶格声子晶体的多点缺陷试验研究

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机械工程学报 2015年第8期51卷 14-19页

作者：赵寰宇汪越胜北京交通大学工程力学研究所北京100044

由于复式晶格能够降低结构对称性,使晶体比较容易打开多个完全带隙。设计有限尺寸新型多点缺陷形式的复式晶格声子晶体,可以形成宽频段声波的局域态和波导。通过试验研究二维(32.***.3.4)晶格钢/水声子晶体的Zigzag型多点缺陷性质,结合超... 详细信息

由于复式晶格能够降低结构对称性,使晶体比较容易打开多个完全带隙。设计有限尺寸新型多点缺陷形式的复式晶格声子晶体,可以形成宽频段声波的局域态和波导。通过试验研究二维(32.***.3.4)晶格钢/水声子晶体的Zigzag型多点缺陷性质,结合超胞技术,并利用有限元法数值计算该声子晶体缺陷体系的能带结构、本征模态和透射谱。结果表明:数值计算和试验结果符合较好。对Zigzag型多点缺陷分析可知,其数量和形式决定高频(或低频)带隙内声波局域效应、本征模态和波导特性。因此研究复式晶格声子晶体缺陷性质,丰富了调控声波传播的手段,为设计新型声波器件提供了重要的思路。

关键词：声子晶体 Zigzag型多点缺陷 (32.4.3.4)晶格能带结构透射谱