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性能维持的增广可行域Tube鲁棒经济模型预测控制

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控制与决策 2024年第2期39卷 536-544页

作者：何德峰李能卓黄原驰韩平浙江工业大学信息工程学院杭州310023

针对未知但有界扰动作用下的约束线性系统,提出一种性能维持的增广可行域Tube经济模型预测控制(tube economic model predictive control, TEMPC)策略.首先考虑经济性能优化目标和鲁棒稳定控制目标,构造TEMPC优化问题的隐式收缩约束,并... 详细信息

针对未知但有界扰动作用下的约束线性系统,提出一种性能维持的增广可行域Tube经济模型预测控制(tube economic model predictive control, TEMPC)策略.首先考虑经济性能优化目标和鲁棒稳定控制目标,构造TEMPC优化问题的隐式收缩约束,并对系统状态和控制约束进行紧缩Tube设计,给出增广可行域优化问题的数学描述;然后,引入线性分解增广名义终端状态和终端罚函数,扩大优化问题的初始可行域,在此基础上应用终端“三要素”和收缩原理,建立TEMPC策略的递推可行性和闭环系统关于最优经济平衡点有界稳定性的充分性条件,进而证明闭环性能在原初始可行域上的不变性;最后,通过对比仿真结果验证所提出策略的有效性和优越性.

关键词：模型预测控制不确定线性系统鲁棒稳定性经济优化可行域

Intermetallic ferric nickel silicide alloy derived from magadiite by magnesiothermic reaction as bifunctional electrocatalyst for overall water splitting

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Nano Research Energy 2024年第2期3卷 20-30页

作者： Xuyang Jing Yang Mu Zhanming Gao Xueying Dong Changgong Meng chi huang Yifu Zhang School of Chemistry Dalian University of TechnologyDalian 116024China College of Environmental and Chemical Engineering Dalian UniversityDalian 116622China College of Chemistry and Molecular Sciences Wuhan UniversityWuhan 430072China

As the cleanest energy source,hydrogen energy is regarded as the most promising *** electrolysis,as the primary means of hydrogen production,has constantly been the focus of attention in the energy conversion *** eco-friendly,cheap,safe and efficient catalysts for electrochemical water splitting(EWS)is the key ***,the intermetallic silicide alloy is first synthesized via a facile magnesiothermic reduction and employed as bifunctional electrocatalysts for ***-nickel silicide(denoted as FeNiSi)alloy is designed and shows a good electrocatalytic performance for *** lattice distortions of FeNiSi enhance the electrocatalytic ***,the porous structure affords more active sites and improves the reaction *** a consequence,FeNiSi delivers an excellent performance with overpotential of 308 mV for oxygen evolution reaction(OER)and 386 mV for hydrogen evolution reaction(HER)at 10 mA·cm−2 in 1 M *** stability structure of intermetallic silicide achieves an outstanding durability with an unchanged potential of 1.66 V for overall water splitting at 10 mA·cm−2 for 15 *** work not only provides a facile method for the synthesis of intermetallic silicide with considerable porous structures,but also develops the potential of intermetallic silicide alloy as bifunctional electrocatalysts for EWS,which opens up a new avenue for the design and application of intermetallic silicide alloy.

关键词： bimetallic silicide magadiite magnesiothermic reduction bifunctional electrocatalyst overall water splitting

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决策树码率自适应算法的无数据蒸馏框架

计算机学报 2024年第1期47卷 113-130页

作者：黄天驰李朝阳张睿霄李文哲孙立峰清华大学计算机科学与技术系北京100084

码率自适应(Adaptive Bit-Rate,ABR)算法是流媒体视频传输中至关重要的技术.该算法根据当前网络情况和播放状态等因素,为下一个视频块选择合适的码率,以确保用户获得良好的体验质量(QoE).其中,基于学习的ABR算法因其不依赖传统模型和从... 详细信息

码率自适应(Adaptive Bit-Rate,ABR)算法是流媒体视频传输中至关重要的技术.该算法根据当前网络情况和播放状态等因素,为下一个视频块选择合适的码率,以确保用户获得良好的体验质量(QoE).其中,基于学习的ABR算法因其不依赖传统模型和从头学习策略的特点,表现出良好的性能,并逐渐取代需要繁琐调优的启发式ABR算法,成为研究领域的热点.然而,这些算法使用神经网络推理,导致模型参数较多,整体计算量较大,使得在实际场景中难以部署.因此,以往的研究提出了决策树蒸馏方案,即使用轻量级的决策树来提取基于学习的ABR算法的专家策略,并在线上部署这些决策树.然而,本文的实验结果表明,过去的蒸馏框架忽略了训练环境对蒸馏后策略的影响,导致策略的泛化能力较差.因此,本文提出了一种名为NIA(data-free Network-environmental Imitationbased rate Adaptation framework)的新型无数据蒸馏框架,用于生成具有更好泛化性能的决策树A BR算法.NIA通过网络环境生成模块构建多个人工网络环境,并在每次迭代训练前使用环境选择模块来选择适合的网络场景,然后与该场景进行交互,利用基于学生驱动的模仿学习算法完成决策树的蒸馏过程.本文还设计了完整的评测平台测试NIA的性能.实验表明,NIA在各种带宽数据集上展现出良好的QoE性能和泛化性能:(1)相较于启发式算法,在QoE指标上提升了1%~46%;(2)与以往的决策树蒸馏方案相比,在低带宽场景下表现相当,但在高带宽场景下提升了近1倍;(3)总体性能接近甚至超过基于学习的算法(即专家策略)的表现.

关键词：流媒体码率自适应算法无数据蒸馏

Consensus of cyber-physical power systems based on multi-agent systems with communication constraints

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Journal of Modern Power Systems and Clean Energy 2019年第5期7卷 1081-1093页

作者： chi huang Chengli FENG Jinde CAO School of Economic Information Engineering Southwestern University of Finance and EconomicsChengdu 611130China School of Mathematics Southeast UniversityNanjing 210096China College of Mathematics Taiyuan University of TechnologyTaiyuan 030024China

The consensus protocol of cyber-physical power systems is proposed based on fractional-order multi-agent systems with communication *** aims to enable each generator to reach a time-varying common rotor angle and rotor *** constraints including event-triggered sampling and partial information transmission are considered to render the consensus protocol more *** Zeno behavior is excluded during the system sampling process.A sufficient condition is derived to solve the consensus *** effectiveness of the proposed consensus protocol is demonstrated by a numerical example.

关键词： Cyber-physical power system Fractional-order system Multi-agent system Communication constraint

Necessary and Sufficient Conditions for Consensus in Third Order Multi-Agent Systems

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IEEE/CAA Journal of Automatica Sinica 2018年第6期5卷 1044-1053页

作者： chi huang Guisheng Zhai Gesheng Xu College of Mathematics Taiyuan University of TechnologyTaiyuan 030024China Department of Mathematical Sciences Shibaura Institute of TechnologySaitama-337-8570Japan

We deal with a consensus control problem for a group of third order agents which are networked by *** that the control input of each agent is constructed based on weighted difference between its states and those of its neighbor agents, we aim to propose an algorithm on computing the weighting coefficients in the control input. The problem is reduced to designing Hurwitz polynomials with real or complex coefficients. We show that by using Hurwitz polynomials with complex coefficients, a necessary and sufficient condition can be obtained for designing the consensus algorithm. Since the condition is both necessary and sufficient, we provide a kind of parametrization for all the weighting coefficients achieving consensus. Moreover, the condition is a natural extension to second order consensus, and is reasonable and practical due to its comparatively decreased computation burden. The result is also extended to the case where communication delay exists in the control input.

关键词： Communication delay consensus algorithms,graph Laplacians Hurwitz polynomials third order multi-agent systems.

N-doped NaTaO3 synthesized from a hydrothermal method for photocatalytic water splitting under visible light irradiation

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Journal of Energy Chemistry 2017年第3期26卷 515-521页

作者： Che-chia Hu Hui-Hsin huang Yu-chi huang Department of Chemical Engineering and R&D Center for Membrane Technology Chung Yuan Christian UniversityTaoyuan City 32023TaiwanChina

NaTaONcatalysts were synthesized by a hydrothermal（H） and a solid-state（S） methods in this *** H-and S-NaTaONsamples were characterized by X-ray diffraction（XRD）, scanning electron microscopy（SEM）, transmission electron microscopy（TEM）, UV–visible（UV–vis） diffuse reflectance spectroscopy, and photoluminescence（PL） spectroscopy. The XRD patterns of the H-and S-samples showed peaks indexed to the pure phase of perovskite NaTaOand minor peaks assignable to TaNat various synthesis temperatures. Substitution of oxygen by nitrogen ions causes the light absorption of the H-and S-NaTaONsamples to be extended to the 600–650 nm region, thus making the samples visible-light active. The NaTaONsamples exhibited photocatalytic activity for Hand Oevolution from aqueous methanol and silver nitrate solutions under visible-light irradiation. The UV–vis and PL spectra of the Hand S-catalysts revealed the presence of cationic vacancies and reduced metallic species, which acted as recombination centers. These results demonstrated that the preparation method plays a critical role in the formation of defect states, thereby governing the photocatalytic activity of the NaTaONcatalysts.

关键词： Photocatalysis H2 production N-doped NaTaO3 Hydrothermal method Visible light

Age-stage, two-sex life tables of Bactrocera cucurbitae （Coquillett）（Diptera： Tephritidae） with a discussion on the problem of applying female age-specific life tables to insect populations

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Insect Science 2012年第2期19卷 263-273页

作者： Yu-Bing huang Hsin chi Laboratory of Theoretical and Applied Ecology Department of Entomology National Chung Hsing University Taichung Taiwan China

Age-stage, two-sex life tables of the melon fly, Bactrocera cucurbitae （Coquil- let-t）（Diptera： Tephritidae）, reared on cucumber （Cucumis sativus L.）, sponge gourd （Luffa cylindrica Roem） and a carrot medium （mashed Daucus carota L. mixed with sucrose and yeast hydrolysate） were constructed under laboratory conditions at 25 4- loc, 65% 4- 0.5% relative humidity, and a photoperiod 12 ： 12h （L ： D）. The intrinsic rates of increase of B. cucurbitae were 0.144 6, 0.141 2 and 0.068 8 days on cucumber, sponge gourd, and carrot medium, respectively. The highest net reproduction rate was 172 offspring per fly reared on sponge gourd. The mean generation times ofB. cucurbitae ranged from 34 days reared on cucumber to 56 days reared on carrot medium. The life history raw data was analyzed using the traditional female age-specific life table and compared to results obtained using the age-stage, two-sex life table. When the age-specific female life table is applied to an age-stage-structured two-sex population, survival and fecundity curves will be improperly manipulated due to an inability to include variation in preadult development time. We discussed different interpretations of the relationship between the net reproductive rate and the intrinsic rate of increase to clarify possible misunderstanding in the literature.

关键词： Bactrocera cucurbitae Cucumis sativus Daucus carota life table Luffa cylindrica

Bisimulation-based stabilization of probabilistic Boolean control networks with state feedback control

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Frontiers of Information Technology & Electronic Engineering 2020年第2期21卷 268-280页

作者： Nan JIANG chi huang Yao CHEN Jürgen KURTHS School of Economic Information Engineering Southwestern University of Finance and EconomicsChengdu 611130China School of Mathematics Southeast UniversityNanjing 210096China Potsdam Inslxtute for Climate Impact Research Potsdam 14412Germany Department of Phystcs Humboldt-Universitcit zu BerlinBerlin 12489Germany Samtov State University Saratov 410012Russia

This study is concerned with probabilistic Boolean control networks(PBCNs)with state feedback control.A novel definition of bisimilar PBCNs is proposed to lower computational *** understand more on bisimulation relations between PBCNs,we resort to a powerful matrix manipulation called semi-tensor product(STP).Because stabilization of networks is of critical importance,the propagation of stabilization with probability one between bisimilar PBCNs is then considered and proved to be ***,the transient periods(the maximum number of steps to implement stabilization)of two PBCNs are certified to be identical if these two networks are paired with a bisimulation *** results are then extended to the probabilistic Boolean networks.

关键词： Probabilistic Boolean control network Bisimulation Stabilization with probability one State feedback control

Quadratic stabilisation of switched affine systems

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Journal of Control and Decision 2020年第1期7卷 1-23页

作者： Minqing Xiao Guisheng Zhai chi huang College of Mathematics and Informatics Fujian Key Laboratory of Mathematical Analysis and ApplicationFujian Normal UniversityFuzhouPeople’s Republic of China Department of Mathematical Sciences College of Systems Engineering and ScienceShibaura Institute of TechnologyTokyoJapan Department of Computer Science and Technology School of Economic Information EngineeringSouthwestern University of Finance and EconomicsChengduPeople’s Republic of China

Minqing Xiao received the *** from Chongqing University,Chongqing,china,in *** is currently a Professor with the College of Mathematics and Informatics,Fujian Normal University,Fuzhou,*** current research interests include robust control/filter theory,delta operator systems,networked control systems,and switched systems;Guisheng Zhai received his *** from Fudan University,china,in 1988,and he received his *** ***,both in system science,from Kobe University,Japan,in 1993 and 1996,*** two years of industrial experience,*** moved to Wakayama University,Japan,in 1998,and then to Osaka Prefecture University,Japan,in *** held visiting professor positions at University of Notre Dame from August 2001 to July 2002,and at Purdue University from March 2016 through February *** April 2010,he joined the faculty board of Shibaura Institute of Technology,Japan,where he currently is a full Professor of Mathematical *** research interests include large scale and decentralised control systems,robust control,switched systems and switching control,networked control and multi-agent systems,neural networks and signal processing,*** is on the editorial board of several academic journals including IET Control Theory&Applications,International Journal of Applied Mathematics and Computer Science,Journal of Control and Decision,and Frontiers of Mechanical *** is a Senior Member of IEEE,a member of ISCIE,SICE,JSST and JSME.

关键词： Switched affine systems(SAS) switched uncertain affine systems(SUAS) quadratic stabilisation convex combination state-dependent switching output-dependent switching convergence set LMIs norm bounded uncertainties