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International Journal of Minerals,Metallurgy and Materials 2024年第2期31卷 268-281页

作者： Han Dang Runsheng xu Jianliang Zhang Mingyong Wang Jinhua Li State Key Laboratory of Advanced Metallurgy University of Science and Technology BeijingBeijing 100083China School of Chemical engineering The University of QueenslandQueensland 4072Australia

The paper proposes a biomass cross-upgrading process that combines hydrothermal carbonization and pyrolysis to produce high-quality blast furnace injection *** results showed that after upgrading,the volatile content of biochar ranged from 16.19%to 45.35%,and the alkali metal content,ash content,and specific surface area were significantly *** optimal route for biochar pro-duction is hydrothermal carbonization-pyrolysis(P-HC),resulting in biochar with a higher calorific value,C=C structure,and increased graphitization *** apparent activation energy(e)of the sample ranges from 199.1 to 324.8 kJ/mol,with P-HC having an e of 277.8 kJ/mol,lower than that of raw biomass,primary biochar,and *** makes P-HC more suitable for blast furnace injection ***,the paper proposes a path for P-HC injection in blast furnaces and calculates potential environmental benefits.P-HC of-fers the highest potential for carbon emission reduction,capable of reducing emissions by 96.04 kg/t when replacing 40wt%coal injec-tion.

关键词： blast furnace injection biomass cross-upgrading hydrothermal carbonization pyrolysis physicochemical properties gasific-ation properties

Fast strength-ductility synergistically adjusting of cold spray additive manufactured Cu deposits via electric pulse processing

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Chinese Journal of Aeronautics 2024年第5期37卷 558-569页

作者： Dong WU Yaxin xu Wenya LI Xiawei YANG Yu SU State Key Laboratory of Solidification Processing School of Materials Science and EngineeringNorthwestern Polytechnical UniversityXi’an 710072China Shaanxi Key Laboratory of Friction Welding Technologies School of Materials Science and EngineeringNorthwestern Polytechnical UniversityXi’an 710072China

electric Pulse Processing(ePP)treatment was innovatively introduced to optimize the strength and ductility of the CSAMed Cu *** results show that ePP is an efficient and fast post-treatment to improve the strength and ductility(within tens of seconds).The larger the pulse current and number of pulses,the better the mechanical ***,this research found that when the heat input determined by pulse current and number of pulses exceeds a certain threshold(pulse current intensity is 2000 A,number of pulses is 10),increasing the number of repeat time could also effectively improve the mechanical properties.A tensile strength of 210 MPa and a ductility of 14.0%could be obtained with reasonable ePP parameters(pulse current intensity is 2000 A,number of pulses is 10,and repeat number is 2),which is similar to those of conventional annealing(e.g.,tensile strength is 272 MPa,elongation is 28.3%).The microstructure evolution analysis shows that ePP can effectively improve the bonding quality between the deposited particles by recrystallization,promote grain growth and the formation of twins,which is the main reason for the improvement of mechanical properties.

关键词： Cold spray additive manufacturing Copper deposit Mechanical property electric pulse processing Post treatment

Nonreciprocal thermal metamaterials:Methods and applications

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International Journal of Minerals,Metallurgy and Materials 2024年第7期31卷 1678-1693页

作者： Zhengjiao xu Chuanbao Liu xueqian Wang Yongliang Li Yang Bai Institute for Advanced Material and Technology University of Science and Technology BeijingBeijing 100083China School of Materials Science and engineering University of Science and Technology BeijingBeijing 100083China

Nonreciprocity of thermal metamaterials has significant application prospects in isolation protection,unidirectional transmission,and energy ***,due to the inherent isotropic diffusion law of heat flow,it is extremely difficult to achieve nonreciprocity of heat *** review presents the recent developments in thermal nonreciprocity and explores the fundamental theories,which underpin the design of nonreciprocal thermal metamaterials,i.e.,the Onsager reciprocity ***,three methods for achieving nonreciprocal metamaterials in the thermal field are elucidated,namely,nonlinearity,spatiotemporal modulation,and angular momentum bias,and the applications of nonreciprocal thermal metamaterials are *** also discuss nonreciprocal thermal ***,the potential applications of nonreciprocity to other Laplacian physical fields are ***,the prospects for advancing nonreciprocal thermal metamaterials are highlighted,including developments in device design and manufacturing techniques and machine learning-assisted material design.

关键词： thermal metamaterials nonreciprocity nonlinearity spatiotemporal modulation

Adaptive active inceptor design under shared control architecture for nonlinear pilot-induced oscillations

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Chinese Journal of Aeronautics 2024年第6期37卷 276-292页

作者： Xiaoyu LIU Liguo SUN Wenqian TAN Shuting xu Junkai JIAO School of Aeronautic Science and engineering Beihang UniversityBeijing 100191China College of engineering Beijing Forestry UniversityBeijing 100083China

This paper presents a Shared Control Architecture(SCA)between a human pilot and a smart inceptor for nonlinear Pilot Induced Oscillations(PIOs),e.g.,category II or III *** innovation of this paper is that an intelligent shared control architecture is developed based on the intelligent active inceptor technique,i.e.,Smart Adaptive Flight effective Cue(SAFe-Cue).A deep reinforcement learning approach namely Deep Deterministic Policy Gradient(DDPG)method is chosen to design a gain adaptation mechanism for the SAFe-Cue *** doing this,the gains of the SAFe-Cue will be intelligently tuned once nonlinear PIOs triggered;meanwhile,the human pilot will receive a force cue from the SAFe-Cue,and will consequently adapting his/her control *** second innovation of this paper is that the reward function of the DDPG based gain adaptation approach is constructed according to flying *** the premise of considering failure situation,task completion qualities and pilot workload are also taken into ***,the proposed approach is validated using numerical simulation experiments with two types of scenarios:lower actuator rate limits and airframe *** Inceptor Peak Power-Phase(IPPP)metric is adopted to analyze the human-vehicle system simulation *** and analysis show that the DDPG based sharing control approach can well address nonlinear PIO problems consisting of Categories Ⅱ and Ⅲ PIO events.

关键词： Shared control architecture Activeinceptor Deep reinforcement learning Nonlinear pilot-induced oscillations Human-vehicle system

electronic modulation of sprout-shaped NiCoP nanoarrays by N and Ce doping for efficient overall water splitting

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Nano Research 2024年第1期17卷 282-289页

作者： Ting Zhao Guancheng xu Bingbing Gong Jiahui Jiang Li Zhang State Key Laboratory of Chemistry and Utilization of Carbon Based energy Resources College of ChemistryXinjiang UniversityUrumqi 830017China College of Chemical engineering Xinjiang UniversityUrumqi 830017China

Bifunctional catalysts for hydrogen/oxygen evolution reactions(HeR/OeR)are urgently needed given the bright future of water splitting hydrogen production ***,the self-supporting N and Ce dual-doped NiCoP nanoarrays(denoted N,Ce-NiCoP/NF)grown on Ni foam are successfully *** the N,Ce-NiCoP/NF simultaneously acts as the HeR and OeR electrodes,the voltages of 1.54 and 2.14 V are obtained for driving 10 and 500 mA·cm^(-2)with a robust durability,and demonstrate its significant potential for practical water *** to both experiments and calculations,the electronic structure of NiCoP may be significantly altered by strategically incorporating N and Ce into the lattice,which in turn optimizes the Gibbs free energy of HeR/OeR intermediates and speeds up the water splitting ***,the sprout-shaped morphology significantly increases the exposure of active sites and facilitates charge/mass transfer,thereby augmenting catalyst *** study offers a potentially effective approach involving the regulation of anion and cation double doping,as well as architectural engineering,for the purpose of designing and optimizing innovative electrocatalysts.

关键词： transition metal phosphides overall water splitting elements doping nanoarrays

Systematic review and Meta-analysis of brain plasticity associated with electroacupuncture in experimental ischemic stroke

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Journal of Traditional Chinese Medicine 2024年第5期44卷 859-870页

作者： xu Yingshan WU Chunxiao YU Wei GUO Hongji LU Liming xu Nenggui TANG Chunzhi College of Acupuncture and Massage Shaanxi University of Chinese Medicine Department of encephalopathy Shenzhen Hospital of Integrated Traditional Chinese and Western MedicineGuangzhou University of Chinese Medicine Department of Obstetrics and Gynecology Shenzhen Hospital of Guangzhou University of Chinese Medicine Medical College of Acu-Moxi and Rehabilitation Guangzhou University of Chinese Medicine

OBJeCTIVe: To systematically evaluate the role of electroacupuncture in maintaining brain plasticity in ischemic stroke mediated brain damage. MeTHODS: We searched for all relevant trials published through Oct 7, 2022 from seven databases. Methodological quality was assessed using the CAMARADeS Risk of Bias Tool. A Meta-analysis of comparative effects was performed using Review Manager v.5.3 software. ReSULTS: A total of 101 studies involving 2148 animals were included. For most studies, primary outcomes results of the Meta-analysis indicate that eA significantly improved ischemic stroke rat's postsynaptic density thickness [Standardized Mean Difference(SMD) = 1.41, 95% confidence interval(CI)(0.59, 2.23), P = 0.0008], numerical density of synapses [SMD = 1.55, 95% CI(0.48, 2.63), P = 0.005] compared with non-eA-treated. Similarly, eA could improve parts of biomarkers of synapses, neurogenesis, angiogenesis and neurotrophin activity than the control group(P e existing evidence suggests eA regulating ischemic stroke may be through brain plasticity. More rigorous and high quality studies should be conducted in the future.

关键词： Meta-analysis animal brain plasticity electroacupuncture experimental ischemic stroke systematic review

evolutionary game analysis of information service quality control of e-commerce platforms under information ecology

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Journal of Management Analytics 2024年第1期11卷 135-159页

作者： Xiaojun xu Lu Wang Xiaoli Wang School of economics and Management Yanshan UniversityQinhuangdaoPeople’s Republic of China

Due to the information asymmetry and imperfect supervision system,the problem of information service quality of e-commerce platforms is becoming increasingly *** on the perspective of information ecology,this paper constructs a three-party evolutionary game model including merchants,e-commerce platforms and governments,and analyzes the dynamic process of the threeparty game under bounded rationality,thereby characterizing the behavior and optimal strategies of information service quality *** carry out numerical simulation using data of the Pinduoduo *** results show that the cost of each party,control strength of e-commerce platforms,proportion of margin deducted and other factors are important factors affecting the quality of information service;Only when the sum of the costs of passive management of e-commerce platforms,penalties for merchants,and the additional revenue generated from the active management exceeds the cost of the active management of the e-commerce platforms,it ensures effective control over the quality of information service in a stable market ***,some suggestions are put forward to optimize the e-commerce information service quality control.

关键词： e-commerce platforms information service quality control evolutionary game information ecology

Fe3O4@SiO2-Protein A-oHSV/CD63 Ab for Capturing Virus and exosomes

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Journal of Analysis and Testing 2024年第3期8卷 335-350页

作者： Wenqing Zheng Pingyi Zheng Ran Zhao Xinyu xu Xiao Zhang Xiaoqian Yuan Ying xu Zichuan Liu Youxin Li Tianjin Key Laboratory for Modern Drug Delivery and High-eiffciency Collaborative Innovation Center of Chemical Science and Engineering School of Pharmaceutical Science and Technology Faculty of MedicineTianjin University

Protein A modi?ed magnetic spheres (Fe3O4@SiO2-Protein A) with 22.7 emu/g saturation magnetization were prepared and *** spheres had a diameter of 10 nm and was stable up to 229.2°C,and can bond 19.694 mg/g of Protein *** Fe3O4@SiO2-Protein A was?rstly combined with oHSV-BJ-2-A antibody to capture oHSV from disease venom,and the amount of binding virus was 1.92×107to 3.44×107PFU/***3O4@SiO2-Protein A was modi?ed with CD63 antibody,which was further?xed using dissuccinimide octylate （DSS） as a crosslinking *** prepared Fe3O4@Si O2-Protein A-CD63 Ab was useful in isolating and enriching exosomes from cell *** with commercial kits,Fe3O4@SiO2-Protein A-CD63 Ab demonstrated a better puri?cation e?ect,which was successfully monitored using capillary *** total content of exosomes protein extracted using Fe3O4@SiO2-Protein A-CD63 was 3.4 mg/g,which was obviously higher than that reported in some *** addition,Fe3O4@SiO2-Protein A-CD63 Ab also showed its repeatability through bonding and elution of 5 cycles,which was e?ective in cost *** indicated Fe3O4@SiO2-Protein A-CD63 Ab had the potential for large-scale puri?cation of exosomes in practical applications.

关键词： Antibody exosome Herpes simplex virus Immunomagnetic spheres

Removal of rubidium from brine by an integrated film of sulfonated polysulfone/graphene/potassium copper ferricyanide

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Chinese Journal of Chemical engineering 2024年第5期69卷 112-121页

作者： Huanxi xu Peihua Lin Pei-Jun Liu Hai-Gang Liu Hui-Bin Guo Chao-Xiang Wu Ming Fang xu Zhang Guan-Ping Jin Anhui Province engineering Research Center of Flexible and Intelligent Materials School of Chemistry and Chemical EngineeringHefei University of TechnologyHefei 230009China Chemical Design and Research Institute Co. LTD of Qinghai ProvinceQinghai Engineering and Technology Research Center of Fine ChemicalXining 810008China

A novel integrated film of sulfonated polysulfone/graphene/potassium copper ferricyanide(KCuFC/SPSG)was used for selectively extracting rubidium ion(Rb^(+))from *** form KCuFC/SPSG,the precursor film of sulfonated polysulfone/graphene(SPSG)was synthesized by phase conversion process,which was alternately immersed in 0.1 mol·L^(-1)CuSO_(4)/K_(4)[Fe(CN)_(6)]by in-situ adsorption coupled co-precipitation *** data such as nuclear magnetic resonance spectrometer,Fourier transform infrared spectroscope,X-ray photoelectron spectroscope,X-ray diffraction,scanning electron microscope,and energy dispersive spectroscopy all verified that abundant KCuFC were uniformly located on the *** resulting KCuFC/SPSG was used in film separation *** the solution was fed into the system,the Rb^(+)could be selectively adsorption by KCuFC/*** the saturation adsorption,0.5 mol·L^(-1)NH_(4)Cl/HCl was fed into the film cell,Rb^(+)could be quickly desorbed by ion-exchange between Rb^(+)and NH_(4)^(+)in the lattice of *** purpose of separating and recovering Rb^(+)from the brine can be achieved after the repeated *** effects of pH,adsorption time,and interferential ions on the adsorption capacity of Rb^(+)were investigated by batch *** adsorption behavior fits the pseudo-second order kinetic process,while KCuFC has a higher adsorption capacity(Langmuir maximum sorption 165.4 mg·g^(-1)).In addition,KCuFC/SPSG shows excellent selectivity for Rb^(+)even in complex brine ***/SPSG could maintain 93.5%extraction efficiency after five adsorption/desorption cycles.

关键词： Rubidium extraction Potassium copper ferricyanide Sulfonated polysulfone Graphene oxide Adsorption

Rapid and real-time detection of municipal sludge moisture content based on microwave reflection principle

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Waste Disposal and Sustainable energy 2024年第2期6卷 259-269页

作者： Yan Zhang Yanhong Jiao Jun Li Long Deng Binqi Rao Hao xu Peng xu Lijiang Hu Chunping Li College of Mechanical and electrical engineering China Jiliang UniversityHangzhou 310018China New energy engineering and Automotive College Huzhou Vocational and Technical CollegeHuzhou 313099China College of electronics and Information engineering Wuxi UniversityWuxi214105China National Institute of Metrology Beijing 100029China College of Science China Jiliang UniversityHangzhou 310018China Anji Guoqian environment Co. LtdHuzhou 313300China Zhejiang Hongshi environmental Protection Co. LtdJinhua 321100China

The moisture content(MC)of municipal sludge is the key factor affecting sludge treatment and disposal technologies,while the vast majority of existing measurement methods are off-line and *** realize rapid online detection for the MC of sludge,a detection method based on the microwave reflection principle is proposed:experiments are carried out and the MC computation model of the sludge is derived using the resonant frequency and the permittivity(e').The results reveal that the detection accuracy of granular sludge with a thickness of 10 mm is *** theoretical model between the MC and the real part of e'is developed,and the relationship between the resonant frequency and e'is expressed by a cubic *** average error and the root mean square error(RMSe)of sludge are 2.06%and 2.49%,*** prediction model for the MC of sludge is also given,and the determination coefficient and RMSe are 0.981 and 2.06%,respectively.

关键词： Municipal sludge Moisture content Resonator Real-time detection Resonant frequency