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Interaction and characteristics of furfural residues and polyvinyl chloride in fast co-pyrolysis

Frontiers of Chemical Science and engineering 2024年第12期18卷 13-21页

作者： Yue Zhang Moshan Li Erfeng Hu Rui Qu Shuai Li Qingang Xiong State Key Laboratory of Coal Mine Disaster Dynamics and Control Chongqing UniversityChongqing 400044China State Key Laboratory of Pulp and Paper Engineering South China University of TechnologyGuangzhou 510640China

This study investigated the interaction between the furfural residue and polyvinyl chloride co-pyrolysis using an infrared heating *** analytical techniques including production distribution analysis,thermal behavior,pyrolysis kinetic,simulated distillation and gas chromatography-mass spectrography(GCMS),and X-ray photoelectron spectroscopy were utilized to elucidate the pyrolysis characterization and reaction mechanism during the ***,the yield of co-pyrolysis oil increased from 35.12%at 5℃·s^(–1)to 37.70%at 10℃·s^(-1),but then decreased to 32.07%at 20℃·s^(-1).Kinetic and thermodynamic parameters suggested non-spontaneous and endothermic *** analysis revealed that aromatic hydrocarbons,especially mono-and bi-cyclic ones,are the predominant compounds in the oil due to the presence of H radicals in polyvinyl chloride,suggesting an enhancement in oil ***,the fixed chlorine content increased to 65.11%after co-pyrolysis due to the interaction between inorganic salts in furfural residues and chlorine from polyvinyl chloride.

关键词： infrared heating pyrolysis oil polyvinyl chloride chlorine co-pyrolysis

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Bamboo-like MnO_(2)·Co_(3)O_(4):High-performance catalysts for the oxidative removal of toluene

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Journal of Environmental Sciences 2025年第1期147卷 617-629页

作者： Ali Rastegarpanah Jiguang Deng Yuxi Liu Lin Jing Wenbo Pei Jia Wang Hongxing Dai Beijing Key Laboratory for Green Catalysis and Separation Key Laboratory of Beijing on Regional Air Pollution ControlKey Laboratory of Advanced Functional MaterialsEducation Ministry of ChinaLaboratory of Catalysis Chemistry and NanoscienceDepartment of Chemical EngineeringFaculty of Environment and LifeBeijing University of TechnologyBeijing 100124China

Themanganese-cobalt mixed oxide nanorodswere fabricated using a hydrothermalmethod with different metal precursors(KMnO_(4)and MnSO_(4)·H_(2)O for MnOx and Co(NO3)2>6H_(2)O and CoCl_(2)>6H_(2)O for Co_(3)O_(4)).Bamboo-like MnO_(2)>Co_(3)O_(4)(B-MnO_(2)>Co_(3)O_(4)(S))was derived from repeated hydrothermal treatments with Co_(3)O_(4)@MnO_(2)and MnSO_(4)>H_(2)O,whereas Co_(3)O_(4)@MnO_(2)nanorods were derived from hydrothermal treatment with Co_(3)O_(4)nanorods and KMnO_(4).The study shows that manganese oxide was tetragonal,while the cobalt oxide was found to be cubic in the crystalline *** surface ions were present in multiple oxidation states(e.g.,Mn^(4+)and Mn^(3+))and surface oxygen *** content of adsorbed oxygen species and reducibility at low temperature declined in the sequence of BMnO_(2)>Co_(3)O_(4)(S)>Co_(3)O_(4)@MnO_(2)>MnO_(2)>Co_(3)O_(4),matching the changing trend in *** all the samples,B-MnO_(2)>Co_(3)O_(4)(S)showed the preeminent catalytic performance for the oxidation of toluene(T10%=187℃,T50%=276℃,and T90%=339℃).In addition,the B-MnO_(2)>Co_(3)O_(4)(S)sample also exhibited good H_(2)O^(-),CO_(2)^(-),and SO_(2)^(-)resistant *** good catalytic performance of B-MnO_(2)>Co_(3)O_(4)(S)is due to the high concentration of adsorbed oxygen species and good reducibility at low *** oxidation over B-MnO_(2)>Co_(3)O_(4)(S)proceeds through the adsorption of O_(2)and toluene to form O∗,OH∗,and H_(2)C(C6H5)∗species,which then react to produce benzyl alcohol,benzoic acid,and benzaldehyde,ultimately converting to CO_(2)and H_(2)*** findings suggest that B-MnO_(2)>Co_(3)O_(4)(S)has promising potential for use as an effective catalyst in practical applications.

关键词： Manganese-cobalt mixed oxide Nanorod Bamboo-like morphology Hydrothermal method Toluene oxidation

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Numerical investigation on dynamic response of the screen mesh in vibrating screening through DEM-FEM co-simulation

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Particuology 2024年第4期87卷 205-217页

作者： Huan Zhang Xiao Zheng Weimin Jing Key Laboratory of MetallurgicalEquipment and Control Technology Ministry of EducationWuhan University of Science and TechnologyWuhan430081 China Hubei Key Laboratory of Mechanical Transmssion and Manufacturing Engineering Wuhan University of Science and TechnologyWuhan430081China College of Mechanical and Vehicle Engineering Chongqing UniversityChongqing400044China

Dynamic response of the screen mesh is of great significance in the optimum vibrating screen *** this paper,based on the DEM-FEM co-simulation method,the effect of screening parameters on the dynamic response of the screen mesh is explored and the mechanism is revealed on the particle ***,a virtual experiment on a linear vibrating screen was carried out to analyze the screening pa-rameters'effect with both impact load and sustained stress inflicted on the screen ***,the time-domain evolution regularity of the screen mesh LVA(Local Vibration Amplitude)under different particle plugging conditions was investigated based on the ***,the influence of screening parameters on LVA and its distribution was *** results show that the screening parameters can greatly affect the screen mesh LVA and its distribution by changing the movement of the granular material and the particle penetration probability,which provides an important basis for the optimal design of the screen mesh and its supporting structure.

关键词： Vibrating screen Dynamic response DEM-FEM Screening parameters Local vibration amplitude

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Modulation of the unfolded protein response by white spot syndrome virus via wsv406 targeting BiP to facilitate viral replication

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Virologica Sinica 2024年第6期39卷 938-950页

作者： Shihan Chen Qiqi Zhong Xuzheng Liao Haiyang Wang Bang Xiao Jianguo He Chaozheng Li School of Marine Sciences Sun Yat-sen UniversityState Key Laboratory of Biocontrol/Southern Marine Science and Engineering Guangdong Laboratory(Zhuhai)Guangzhou510275China Guangdong Provincial Key Laboratory of Marine Resources and Coastal Engineering/Guangdong Provincial Key Laboratory for Aquatic Economic Animals Sun Yat-sen UniversityGuangzhou510275China China-ASEAN Belt and Road Joint Laboratory on Marine Aquaculture Technology Sun Yat-sen UniversityGuangzhou510275China

Outbreaks of diseases are often linked to environmental stress,which can lead to endoplasmic reticulum(ER)stress and subsequently trigger the unfolded protein response(UPR).The replication of the white spot syndrome virus(WSSV),the most serious pathogen in shrimp aquaculture,has been shown to rely on the UPR signaling pathway,although the detailed mechanisms remain poorly *** this study,we discovered that WSSV enhances its replication by hijacking the UPR pathway via the viral protein *** analysis revealed a significant upregulation of wsv406 in the hemocytes and gills of infected *** spectrometry analysis identified that wsv406 interacts specifically with the immunoglobulin heavy-chain-binding protein(BiP)in shrimp Litopenaeus *** examination revealed that wsv406 binds to multiple domains of LvBiP,inhibiting its ATPase activity without disrupting its binding to UPR stress *** either wsv406 or LvBiP resulted in a reduction in WSSV replication and improved shrimp survival ***,wsv406 activation of the PRKR-like ER kinase(PERK)-eukaryotic translation initiation factor 2α(eIF2α)and activating transcription factor 6(ATF6)pathways was demonstrated by a decrease in the phosphorylation of eIF2αand the nuclear translocation of ATF6 when wsv406 was silenced during WSSV *** activation facilitated the transcription of WSSV genes,promoting viral *** summary,these findings reveal that wsv406 manipulates the host UPR by targeting LvBiP,thereby enhancing WSSV replication through the PERK-eIF2αand ATF6 path*** insights into the interaction between WSSV and host cellular machinery offer potential targets for developing therapeutic interventions to control WSSV outbreaks in shrimp aquaculture.

关键词： Shrimp White spot syndrome virus Unfolded protein response wsv406 Binding protein(BiP)

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Microstructure Features and the Macroscopic Acoustic Behavior of Gassy Silt in the Yellow River Delta

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Journal of Ocean University of China 2024年第2期23卷 371-382页

作者： LIU Tao GUO Zhenqi ZHANG Yan WU Chen LIU Lele DENG Shenggui Laboratory for Marine Geology Pilot National Laboratory for Marine Science and TechnologyQingdao 266061China Shandong Provincial Key Laboratory of Marine Environment and Geological Engineering Ocean University of ChinaQingdao 266100China College of Civil Engineering Anhui Jianzhu UniversityHefei 230601China The Key Laboratory of Gas Hydrate Ministry of Natural ResourcesQingdao Institute of Marine GeologyQingdao 266071China College of Marine Geosciences Key Laboratory of Submarine Geosciences and ProspectingOcean University of ChinaQingdao 266100China

The morphological changes in isolated bubbles in gassy silt play a critical role in the microscopic structures between soil particles and bubbles and macroscopic physical *** on X-ray CT scanning experiments under various vertical loads(four levels),self-designed acoustic macro experiments,and a series of formula revisions to the macro-air-bearing silt sound-velocity prediction model,this paper discusses the macro-and micro-scale features of gassy silts from the Yellow River *** samples consisted of different proportions of silt from the Yellow River Delta and porous media,and they were used to form two types of aerosol silts with initial gas contents of 4.23%and 7.67%.The results show that the air bubble content and external load considerably affect the microstructural parameters and acoustic behavior of gassy silt in the Yellow River *** macroscopic sound velocity showed a linear positive correlation with vertical load and relation to microstructural parameters in varying manners and *** on the traditional Biot-Stoll acoustic model,the gas-phase medium coefficient was introduced for the proper calculation and prediction of the sound velocity of air-bearing *** errors of the overall prediction varied between 5.6%and 9.6%.

关键词： gassy silt vertical load microstructure parameters bubble vibration Biot-Stoll acoustic model

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Method for Identifying Critical Branches of Cascading Failures in Complex Power Grids Based on Comprehensive Brittleness 43

Method for Identifying Critical Branches of Cascading Failur...

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43rd Chinese control Conference, CCC 2024

作者： Tian, Xiao Liu, Zhiquan Shanghai Maritime University Key Laboratory of Transport Industry of Marine Technology and Control Engineering Shanghai201306 China

ISBN: (纸本)9789887581581

The extensive integration of wind power into the grid will exert a profound influence on the stability of the power system. To address the limitations of the current critical branch identification model, which fails to consider both the power grid structure and operation state, neglects voltage, and employs a single index weight assignment mode, this paper proposes a method for identifying critical branches through a comprehensive brittleness. From a brittleness perspective, this study establishes indices for brittle electric betweeness, brittle power flow distribution entropy, brittle power flow transfer entropy, and brittle voltage deviation taking into account relevant electrical impact factors. The game combination weighting method is proposed, determining the optimal combination weight of intuitionistic fuzzy analytic network process and entropy weight method integrating the four indices to obtain the comprehensive brittleness index. Finally, the proposed integrated brittleness identification method is verified using the IEEE39 bus system, demonstrating its effectiveness and feasibility in identifying key branches comprehensively and reasonably. © 2024 Technical Committee on control Theory, Chinese Association of Automation.

关键词： Brittleness

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Cooperative decision-making algorithm with efficient convergence for UCAV formation in beyond-visual-range air combat based on multi-agent reinforcement learning

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Chinese Journal of Aeronautics 2024年第8期37卷 311-328页

作者： Yaoming ZHOU Fan YANG Chaoyue ZHANG Shida LI Yongchao WANG School of Aeronautic Science and Engineering Beihang UniversityBeijing 100191China Key Laboratory of Industrial Control Technology Institute of Cyber-Systems and ControlZhejiang UniversityHangzhou 310027China

Highly intelligent Unmanned Combat Aerial Vehicle(UCAV)formation is expected to bring out strengths in Beyond-Visual-Range(BVR)air *** Multi-Agent Reinforcement Learning(MARL)shows outstanding performance in cooperative decision-making,it is challenging for existing MARL algorithms to quickly converge to an optimal strategy for UCAV formation in BVR air combat where confrontation is complicated and reward is extremely sparse and *** to solve this problem,this paper proposes an Advantage Highlight Multi-Agent Proximal Policy Optimization(AHMAPPO)***,at every step,the AHMAPPO records the degree to which the best formation exceeds the average of formations in parallel environments and carries out additional advantage sampling according to ***,the sampling result is introduced into the updating process of the actor network to improve its optimization ***,the simulation results reveal that compared with some state-of-the-art MARL algorithms,the AHMAPPO can obtain a more excellent strategy utilizing fewer sample episodes in the UCAV formation BVR air combat simulation environment built in this paper,which can reflect the critical features of BVR air *** AHMAPPO can significantly increase the convergence efficiency of the strategy for UCAV formation in BVR air combat,with a maximum increase of 81.5%relative to other algorithms.

关键词： Unmanned combat aerial vehicle(UCAV)formation Decision-making Beyond-visual-range(BVR)air combat Advantage highlight Multi-agent reinforcement learning(MARL)

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Seismic fragility analysis of three-tower cable-stayed bridges with different connection configurations

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Earthquake engineering and engineering Vibration 2024年第4期23卷 1009-1027页

作者： Chen Chen Liu Jinlong Lin Junqi Li Suchao Key Laboratory of Earthquake Engineering and Engineering Vibration Institute of Engineering MechanicsChina Earthquake AdministrationHarbin 150080China Key Laboratory of Earthquake Disaster Mitigation Ministry of Emergency ManagementHarbin 150080China Key Laboratory of Structural Dynamic Behavior and Control Ministry of EducationHarbin Institute of TechnologyHarbin 150090China

Seismic fragility analysis of three-tower cable-stayed bridges with three different structural systems,including rigid system(RS),floating system(FS),and passive energy dissipation system(PEDS),is conducted to study the effects of connection configurations on seismic responses and *** element models of bridges are established using OpenSees.A new ground motion screening method based on the statistical characteristic of the predominant period is proposed to avoid irregular behavior in the selection process of ground motions,and incremental dynamic analysis(IDA)is performed to develop components and systems fragility *** effects of damper failure on calculated results for PEDS are examined in terms of seismic response and fragility *** results show that the bridge tower is the most affected component by different structural *** RS,the fragility of the middle tower is significantly higher than other components,and the bridge failure starts from the middle tower,exhibiting a characteristic of local *** FS and PEDS,the fragility of the edge tower is higher than the middle *** system fragility of RS is higher than FS and *** the failure of dampers into account is necessary to obtain reliable seismic capacity of cable-stayed bridges.

关键词： seismic fragility cable-stayed bridge connection configuration viscous damper comparison analysis

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Set-membership Filtering for LPV-based Port Crane Systems with Unknown-but-bounded Disturbances 14

Set-membership Filtering for LPV-based Port Crane Systems wi...

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14th Asian control Conference, ASCC 2024

作者： Wang, Zhenxiang Zhang, Yilian Xu, Weimin Shanghai Maritime University Key Laboratory of Transport Industry of Marine Technology and Control Engineering Shanghai201306 China

ISBN: (纸本)9789887581598

This paper addresses the state estimation problem of port crane systems and proposes a modified set-membership filtering method to obtain real-time state estimation of the crane. Firstly, considering the nonlinear characteristic of the crane system, a discrete Linear Parameter Varying (LPV) crane model is established based on the dynamic characteristic of the crane system. At the same time, the possible noises in the crane system are modeled as unknown but bounded (UBB) noises to describe the uncertainty of the external environment and internal factors of the crane system. Furthermore, according to the constructed LPV-based crane model with UBB noises, a set-membership filter is designed to obtain the real-time state estimation ellipsoid for the crane system, and the optimal state estimation domain is obtained through recursive convex optimization method. Finally, the feasibility and effectiveness of the proposed set-membership filtering method in state estimation of port crane system are verified through simulation experiments. © 2024 Asian control Association.

关键词： Convex optimization

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Promises and challenges in inferring the evolution of ancient organisms using optimum growth temperature

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Science China Earth Sciences 2024年第12期67卷 3960-3962页

作者： Wenkai TENG Chuanlun ZHANG Shenzhen Key Laboratory of Marine Archaea Geo-Omics Department of Ocean Science and EngineeringSouthern University of Science and TechnologyShenzhen 518055China

Scientists from both life and earth sciences have invested generous efforts to investigate the evolutionary history and mechanism of microorganisms in deep *** of the promising efforts may be inferring the optimum gro... 详细信息

关键词： optimum Promise life

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