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作者： Ramasamy, Sivasamy Banjerdpongchai, David Park, PooGyeon Center of Excellence in Intelligent Control Automation of Process Systems Department of Electrical Engineering Faculty of Engineering Chulalongkorn University Bangkok Thailand Department of Electrical Engineering Pohang University of Science and Technology Pohang Korea Republic of

One of the most important goals of theoretical ecologists is to find a strategy for controlling the chaos in ecological models to maintain healthy ecosystems. We investigate the influence of fear and the supply of additional food to predators in a delayed tri-trophic food chain model, where interference among the species is determined by Holling type-II functional response. The proposed model incorporates the fact that the growth rates of prey and middle predators are decreased due to the fear of middle and special predators, respectively. The additional food is supplied to both predators by either nature or external agencies. Furthermore, the poisoned prey in the predator's environment is taken into account. In the proposed model, we use two time delays: one for the growth term of the middle predator and another for the gestation delay of the special predator. We determine the conditions for the existence of ecologically feasible equilibrium points and their local and global stability. In addition, we establish the conditions for the existence of Hopf bifurcation around interior equilibrium to seek periodic behavior in nondelayed and delayed models. Numerical investigations are performed to justify the proposed theoretical findings through phase portraits, time series of solutions, and bifurcation diagrams. We observe that the chaotic dynamics of a tri-trophic food chain model can be controlled by the proper choice of the fear effect and by supplying additional food parameters. As a result, our findings provide more ecological insights into the dynamics of the delayed tri-trophic food chain model with the fear effect and additional food supply. © 2023 John Wiley & Sons, Ltd.

关键词： Hopf bifurcation

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Variations in Rural PM2.5 Sources and Composition in the Post Coal-to-Gas Period Based on a Three-Year Observation

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Aerosol and Air Quality research 2025年第1期25卷 1-13页

作者： Ning, Zhi Li, Zhiyong Wei, Jihong Liu, Jinming Ma, Huichun Ren, Zhuangzhuang Ma, Xiaohua Liu, Chen Chen, Lan Liu, Aiqin Wang, Binglin Wang, Jiaqi Gao, Huiying Hebei Key Lab of Power Plant Flue Gas Multi-Pollutants Control Department of Environmental Science and Engineering North China Electric Power University Baoding071003 China MOE Key Laboratory of Resources and Environmental Systems Optimization College of Environmental Science and Engineering North China Electric Power University Beijing102206 China Department of Pediatrics Affiliated Hospital of Hebei University Baoding071000 China Hebei Key Lab of Mineral Resources and Ecological Environment Monitoring Hebei Research Center for Geoanalysis Baoding071051 China School of Control Science and Engineering North China Electric Power University Baoding071003 China China Environmental United Certification Center Co. Ltd. Beijing100029 China

Introduction: Various studies were conducted focused on the coal-to-gas (CTG) impacts on urban PM2.5 during its implementation. However, the continuity of CTG effectiveness on PM2.5 control in the post CTG remained unclear, especially in rural area, retarding the further emission-control policy optimization. To address this gap, we examined the wintertime rural PM2.5 variations within the Beijing–Tianjin–Hebei during the non-epidemic-lockdown period of winter 2020–2022. Of which, 2020 holds the most stringent CTG enforcement, 2021 marks the conclusion of CTG, and 2022 represents the post CTG. Methods: In this study, the PM2.5 levels in rural areas of the Beijing–Tianjin–Hebei region were monitored during the winters of 2020, 2021, and 2022. Meanwhile, multiple chemical analysis methods were employed to determine its chemical components. The Positive Matrix Factorization (PMF) modeling and Potential source contribution function (PSCF) analysis were employed to analyze the contributions of different sources to PM2.5. Results and Discussion: PM2.5 exhibited an average decrease of 30.4%, and PMF modeling indicated the contributions of coal combustion (CC) to PM2.5 fell from 22.4% in 2020 to 17.8% in 2021, and further to 10.8% by 2022, highlighting the enduring CTG effectiveness. The continuously decreasing CC-specific As, Pb, and SO42– was another evidence for scattered coal prohibition. Reluctantly, the biomass burning (BB) contributions held higher increase of 17.2% in 2021–2022 than 8.86% in 2020–2021, and it has leapt to be the largest PM2.5 contributor (25.4%) in winter 2022. The natural gas shortage and subsidy reduction in winter 2022, as well as the man, and forced demolition of coal-stoves in winter 2022 should be the main inducements. Contrary to the recent upward trend of secondary aerosols, SO42–, NO3–, and NH4+ showed a downward trend, with annual average dropped of 52.6%, 23.4%, and 53.8%, respectively. This should be ascribed to the enhanced primary emiss

关键词： Coal

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Novel 3D-on-2D g-C_(3)N_(4)/AgIn_(x)S_(y)heterojunction photocatalyst for simultaneous and stoichiometric production of H_(2)and H_(2)O_(2)from water splitting under visible light

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Chinese Chemical Letters 2025年第2期36卷 448-453页

作者： Hualin Jiang Wenxi Ye Huitao Zhen Xubiao Luo Vyacheslav Fominski Long Ye Pinghua Chen Key Laboratory of Jiangxi Province for Persistent Pollutants Control and Resources Recycle Nanchang Hangkong UniversityNanchang 330063China College of life science Jinggangshan UniversityJi'an 343009China National Research Nuclear University MEPhI(Moscow Engineering Physics Institute) Moscow 115409Russia

Photocatalytic H_(2)production from water splitting is a promising candidate for solving the increasing energy crisis and environmental *** we report a novel g-C_(3)N_(4)/Ag In_(x)S_(y)S-scheme heterojunction photocatalyst for water splitting into stoichiometric H_(2)and H_(2)O_(2)under visible *** catalyst was prepared by depositing 3D bimetallic sulfide(Ag In_(x)S_(y))nanotubes onto 2D g-C_(3)N_(4)*** to the special 3D-on-2D configuration,the photogenerated carriers could be rapidly transferred and effectively separated through the abundant interfacial heterostructures to avoid recombination,and therefore excellent performance for visible light-driven water splitting could be obtained,with a 24-h H_(2)evolution rate up to 237μmol g^(-1)h^(-1).Furthermore,suitable band alignment enables simultaneous H_(2)and H_(2)O_(2)production in a 1:1 stoichiometric ratio.H_(2)and H_(2)O_(2)were evolved on the conduction band of g-C_(3)N_(4)and on the valance band of Ag In_(x)S_(y),*** novel 3D-on-2D configuration for heterojunction construction proposed in this work provided alternative research ideas toward photocatalytic reaction.

关键词： Photocatalysis Water splitting g-C3N4 Silver indium sulfide H_(2)production H_(2)O_(2)production

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Mechanical behavior of SiC reinforced ZA63 Mg matrix composites: Experiments and 3D finite element modelling

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Journal of Magnesium and Alloys 2025年第3期13卷 1294-1309页

作者： Chong Wang Zelong Du Enyu Guo Shuying Bai Zongning Chen Huijun Kang Guohao Du Yanling Xue Tongmin Wang Key Laboratory of Solidification Control and Digital Preparation Technology(Liaoning Province) School of Materials Science and EngineeringDalian University of TechnologyDalian 116024China Ningbo Institute of Dalian University of Technology Ningbo 315000China Shanghai Synchrotron Radiation Facility Shanghai Advanced Research Institute CASShanghai201204China

In this work,the microstructure evolution and mechanical behavior of extruded SiC/ZA63 Mg matrix composites are investigated via combined experimental study and three-dimensionalﬁnite element modelling(3D FEM)based on the actual 3D microstructure achieved by synchrotron *** results show that the average grain size of composite increases from 0.57μm of 8μm-SiC/ZA63 to 8.73μm of 50μm-SiC/*** type of texture transforms from the typicalﬁber texture in 8μm-SiC/ZA63 to intense basal texture in 50μm-SiC/ZA63 composite and the intensity of texture increases sharply with increase of SiC particle *** dynamic recrystallization(DRX)mechanism is also changed with increasing SiC particle *** and simulation results verify that the strength and elongation both decrease with increase of SiC particle *** 8μm-SiC/ZA63 composite possesses the optimal mechanical property with yield strength(YS)of 383 MPa,ultimate tensile strength(UTS)of 424 MPa and elongation of 6.3%.The outstanding mechanical property is attributed to the ultraﬁne grain size,high-density precipitates and dislocation,good loading transfer effect and the interface bonding between SiC and matrix,as well as the weakened basal *** simulation results reveal that the micro-cracks tend to initiate at the interface between SiC and matrix,and then propagate along the interface between particle and Mg matrix or at the high strain and stress regions,and further connect with other *** main fracture mechanism in 8μm-SiC/ZA63 composite is ductile damage of matrix and interfacial *** the increase of particle size,interface strength and particle strength decrease,and interface debonding and particle rupture become the main fracture mechanism in the 30μm-and 50μm-SiC/ZA63 composites.

关键词： Mg matrix composite Synchrotron tomography 3D finite element model Microstructure evolution Mechanical property

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Current research status on the distribution and transport of micro(nano)plastics in hyporheic zones and groundwater

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Journal of Environmental sciences 2025年第5期151卷 387-409页

作者： Dongming Zhang Qiqing Chen Ting Xu Daqiang Yin Key Laboratory of Yangtze River Water Environment Ministry of EducationCollege of Environmental Science and EngineeringTongji UniversityShanghai 200092China Shanghai Institute of Pollution Control and Ecological Security Shanghai 200092China State Key Laboratory of Estuarine and Coastal Research East China Normal UniversityShanghai 200241China

Micro(nano)plastics,as an emerging environmental pollutant,are gradually discovered in hyporheic zones and *** studies have focused on the origin and spatial/temporal distribution of micro(nano)plastics in regional groundwater,together with the influence of their properties and effects of environmental factors on their ***,the transport of micro(nano)plastics in the whole hyporheic zone-groundwater system and the behavior of co-existing substances still lack a complete theoretical *** provide systematic theoretical support for that,this review summarizes the current pollution status of micro(nano)plastics in the hyporheic zone-groundwater system,provides a comprehensive introduction of their sources and fate,and classifies the transport mechanisms into mechanical transport,physicochemical transport and biological processes assisted transport fromthe perspectives ofmechanical stress,physicochemical reactions,and bioturbation,***,this review proposes to advance the understanding of the multi-dimensional hydrosphere transport of micro(nano)plastics centered on groundwater,themicroorganisms-mediated synergistic transformation and co-transport involving the intertidal ***,this review systematically dissects the presence and transport cycles of micro(nano)plastics within the hyporheic zone-groundwater system and proposes prospects for future studies based on the limitations of current studies.

关键词： Micro(nano)plastics Groundwater Hyporheic zone Transport mechanisms Abundance

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Antibacterial and quorum-sensing inhibitory activities of Alpinia galanga (L.) Willd essential oil against Aeromonas dhakensis and Shewanella seohaensis

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South African Journal of Botany 2025年 182卷 112-119页

作者： Liu, Shouchun Li, Zhuyi Zhang, Luyao Xie, Meixian Wang, Minjie Zhang, Yajie Zhong, Saiyi Hong, Pengzhi Zhu, Chunhua College of Food Science and Technology Guangdong Ocean University Guangdong Provincial Key Laboratory of Aquatic Product Processing and Safety Guangdong Province Engineering Laboratory for Marine Biological Products Guangdong Provincial Engineering Technology Research Center of Seafood Guangdong Provincial Engineering Technology Research Center of Prefabricated Seafood Processing and Quality Control Guangdong Provincial Modern Agricultural Science and Technology Innovation Center Zhanjiang 524088 China Southern Marine Science and Engineering Guangdong Laboratory (Zhanjiang) Zhanjiang 524004 China College of Fisheries Guangdong Ocean University Zhanjiang 524088 China

Alpinia galanga (L.) Willd (AGW) has various properties and is a medicinal and food herb. In the present study, Alpinia galanga (L.) Willd essential oil (AGWEO) was investigated for its major chemical constituents, bacteriostatic activity and quorum sensing (QS) inhibitory properties. The main components of AGWEO were methyl cinnamate (82.04 %) and 1,8-eucalyptin (4.64 %). AGWEO had antibacterial effects on the specific spoilage organism of seafood (Aeromonas dhakensis and Shewanella seohaensis) and Chromobacterium violaceum CV026, and the minimum inhibitory concentrations (MIC) were 15, 25, and 25 μL/mL, respectively. AGWEO at sub-inhibitory concentration (0.5–2 μL/mL) inhibited the production of purple bacteriocin in purple bacillus CV026, and also significantly inhibited the biofilm formation of Aeromonas dhakensis and Shewanella seohaensis (p < 0.05) in a concentration dependence. Meanwhile, AGWEO also inhibited the spoilage bacteria's swarming (approximately 58 % and 36 % reduction), swimming (73.03 % and 70 % reduction, respectively), and extracellular protease activity (16.73 % and 14.08 %). AGWEO could interfere with the QS system of spoilage bacteria and had QS inhibition. Therefore, AGWEO has the potential to be used as a natural QS inhibitor as a novel green method for seafood preservation and conservation. © 2025 SAAB

关键词： Alpinia galanga (L.) Willd essential oil Antibacterial properties Quorum sensing Specific spoilage organism

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Time-varying formation-containment control for heterogeneous multi-agent systems with communication and output delays via observer-based feedback protocol

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IEEE Transactions on Automation science and engineering 2025年 22卷 15435-15448页

作者： Yang, Yi He, Yong China University of Geosciences School of Automation Wuhan430074 China Hubei Key Laboratory of Advanced Control and Intelligent Automation for Complex Systems Wuhan430074 China Ministry of Education Engineering Research Center of Intelligent Technology for Geo-Exploration Wuhan430074 China

In this article, the time-varying formation-containment control problem of heterogeneous multi-agent systems (MASs) with an observer-based state feedback protocol is studied, where both communication delays and output delays are taken into consideration. By introducing an augmented Lyapunov-Krasovskii functionals (LKFs) candidate and employing less conservative methods to estimate its derivative, an improved quasi-formation-containment criterion is derived. On this basis, some observers and controllers are designed to allow for a larger maximum upper bound (MUB) of time delays on the premise of guaranteeing the fulfillment of the time-varying formation of leaders and the bounded convergence of followers. The estimation of the MUB determines the allowable delay range for system stability under the designed observers and controllers. Moreover, a distributed algorithm is developed to calculate the MUB of time delays, the observer gains, and the controller gains. Finally, two simulation experiments are implemented to demonstrate the obtained results, which verify the superiority and practicability of the criterion and algorithm. © 2004-2012 IEEE.

关键词： State feedback

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Vibration Suppression of AMBs-High Speed Motor Using an Enhanced Linear Extended State Observer

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IEEE Access 2025年 13卷 80822-80833页

作者： Gong, Lei He, Pai Dai, Dali Hua, Zhiguang Chen, Jingwen Shaanxi University of Science and Technology School of Electrical and Control Engineering Xi’an710021 China Chongqing Dema Inverter Motor Research and Development Manufacturing Company Ltd. Chongqing400000 China Northwestern Polytechnical University School of Automation Xi’an710129 China

In order to solve the problem of rotor vibration caused by the unbalanced mass of the Active magnetic bearing (AMBs) rotor system, an Enhanced Linear Extended State Observer (ELESO) is designed based on the linear Extended State Observer (LESO). Firstly, the lumped disturbance including the unbalanced force is observed by ELESO, and the observed value is filtered by the band-pass filter (BF), and secondly, the lumped disturbance is compensated in the frequency band where the peak of rotor vibration is generated, so as to reduce the peak vibration of the rotor, and the saturation of the power amplifier caused by compensation in the full frequency band can be avoided. Then, the poles of the closed-loop AMBs rotor system are analyzed, and it is proved that the proposed control method can ensure the stable operation of the system. Finally, the correctness and effectiveness of the proposed method are verified under the working conditions of no disturbance and sensor runout. The results show that the designed control method has a smaller unbalanced vibration peak and a significant reduction in the control current when the rotor is operating in the full speed range compared with the direct use of LESO. © 2013 IEEE.

关键词： State estimation

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Unveiling phosphofructokinase as the key target: an innovative strategy combining pull-down assays with optical imaging for snail-killing mechanism exploration

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science China Chemistry 2025年

作者： Yuxun Lu Weisi Wang Le Yu Yuqiang Zhao Ying Chen Yunhai Guo Bingrong Luo Yuhua Liu Shizhu Li Liping Duan Ying Zhou Yunnan Characteristic Plant Extraction Laboratory College of Chemical Science and Technology Yunnan University College of Biological and Chemical Engineering Guangxi University of Science and Technology National Institute of Parasitic Diseases Chinese Center for Disease Control and Prevention (Chinese Center for Tropical Diseases Research)NHC Key Laboratory of Parasite and Vector Biology WHO Collaborating Centre for Tropical Diseases National Center for International Research on Tropical Diseases School of Chemistry and Environment Yunnan Minzu University Dali Institute of Schistosomiasis Control

The Pomacea canaliculata, also known as apple snail, is an invasive species in China, posing a serious threat to agricultural production and public health. To prevent its rampant infestation, we developed a highly efficient snail-killing lead compound, 1-(4-chlorophenyl)-3-(pyridin-3-yl)urea (PBQ). However, the killing mechanism of PBQ remains unclear. To elucidate this, two novel compounds, B-PBQ and J-PBQ, were developed through structural modification of PBQ and were used, through both protein pull-down assay and confocal laser scanning microscopy imaging, to identify and confirm that phosphofructokinase(PFK) in the apple snail is the primary target protein of PBQ. Further studies revealed that PBQ successfully inhibits the activity,content, and expression of PFK in apple snail, disrupting the glycolysis pathway and leading to abnormal energy *** disruptions impair the snail’s tolerance to low oxygen, resulting in its efficient eradication. These findings offer a promising direction for developing next-generation PFK-targeted snail-killing pesticides. Furthermore, the strategy of combining pull-down assays with optical imaging used in this work provides a novel approach for the exploration of mechanisms of other pesticide candidates.

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Selective hydrodeoxygenation of polyethylene terephthalate plastic wastes into 1;4-dimethylcyclohexane by Ir-ReO_(x)/SiO_(2)+HZSM-5 catalytic system

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science China Chemistry 2025年第4期68卷 1563-1575页

作者： Nan Wang Jieyi Liu Junde Wei Sibao Liu Guozhu Liu Key Laboratory for Green Chemical Technology of Ministry of Education School of Chemical Engineering and Technology Tianjin 300072China Engineering Research Center of Polymer Green Recycling of Ministry of Education Fujian Key Laboratory of Pollution Control&Resource ReuseCollege of Environmental and ResourcesFujian Normal UniversityFuzhou 350007China Haihe Lab of Sustainable Chemical Transformations Tianjin 300192China

In order to mitigate the environmental impact of polyethylene terephthalate(PET)plastic pollution and enhance waste resource utilization;we developed a novel Ir-ReO_(x)/SiO_(2)+HZSM-5 catalytic system for the hydrodeoxygenation(HDO)of PET plastic wastes into cycloalkanes;particularly 1;4-dimethylcyclohexane(DMCH).Under mild conditions(190℃;3 MPa H_(2))with a certain amount of water in cyclopentane solvent;the highest yield of DMCH reached 95.8%;contributing to an overall yield of cycloalkanes at 98.4%within a reaction time of 4 h from HDO of virgin *** HDO of PET into DMCH involved initial hydrogenation of PET aromatic ring;then depolymerized by direct hydrogenolysis of acyl C-O bond in the ester group and subsequent cascade HDO of alcoholic C-O bond to saturated ester and alcohol intermediates;and further HDO of these oxygenates converting into desired DMCH *** Ir-ReO_(x)/SiO_(2) catalyst exhibits fully reduced metallic Ir nanoparticles along with partially reduced ReO_(x) species that are highly dispersed on both SiO_(2) surface and Ir nanoparticle *** oxophilic nature of ReO_(x) species facilitates the activation of C-O bonds;the acidic HZSM-5 zeolite for the promotion of dehydration reaction;and the protic property of H_(2)O for the enhancement of hydrogenation PET contributed to highly HDO activity of this ***;the catalytic system is applicable for the HDO of diverse real-world PET plastic wastes including Coca-ColaTM bottles;green Sprite bottles and white and red discarded fiber cloths;generating DMCH with a yield of up to 95.9%and cycloalkanes with a yield of up to 99.5%.This innovative process presents a new avenue for efficient hydrodeoxygenation conversion of PET into easily separable DMCH which serves as a crucial building block for the production of terephthalic acid to realize the chemical recycling of PET plastic wastes towards a green circular economy.

关键词： plastic wastes PET hydrodeoxygenation cycloalkane Ir-ReO_(x)/SiO_(2)

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