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Journal of Wuhan University of Technology(Materials Science) 2024年第4期39卷 945-953页

作者：王俊凯李来时 lIU feng WANG yuzheng 吴玉胜 School of Material Science and Engineering Shenyang University of TechnologyShenyang 110870China

A method to promote aluminum hydroxide crystal growth through pickling Al(OH)_(3)as seed in the ammonia system was proposed to overcome these *** experimental results show that,under the conditions of pickling time of 15 min,the acid concentration of 10%,the addition of 70 g/l pickling-Al(OH)_(3)seed,and the coarse granular Al(OH)_(3)products(d0.5=85.667)can be *** characterization results show that the phase of the product is gibbsite,consistent with the ***,the steps and ledges can be formed on pickling Al(OH)_(3)seed surface under the ammonia system,effectively promoting crystal *** crystal growth,the roughness of the crystal surface was first increased and then decreased,and the lamellar structure was deposited on the crystal seed *** final particles are approximately round,the surface is compact and *** growth of the product is surface reaction *** addition,the content of the AlO_(6)unit is increased and contributed to Al(OH)_(3)crystal growth.

关键词： reactive crystallization coarse-grained Al(OH)_(3) crystal seed crystal growth process

Ferric ion-triggered surface oxidation of galena for efficient chalcopyrite-galena separation

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International Journal of Minerals,Metallurgy and Materials 2024年第2期31卷 261-267页

作者： Qiancheng Zhang limin Zhang feng Jiang Honghu Tang li Wang Wei Sun School of Minerals Processing and Bioengineering Central South UniversityChangsha 410083China Engineering Research Center of Ministry of Education for Carbon Emission Reduction in Metal Resource Exploitation and Utilization Changsha 410083China School of Resource and Environment Hunan University of Technology and BusinessChangsha 410083China

The efficient separation of chalcopyrite(CuFeS2)and galena(PbS)is essential for optimal resource ***,find-ing a selective depressant that is environmentally friendly and cost effective remains a *** various techniques,such as mi-croflotation tests,Fourier transform infrared spectroscopy,scanning electron microscopy(SEM)observation,X-ray photoelectron spec-troscopy(XPS),and Raman spectroscopy measurements,this study explored the use of ferric ions(Fe^(3+))as a selective depressant for *** results of flotation tests revealed the impressive selective inhibition capabilities of Fe^(3+)when used *** analysis showed that Fe^(3+)significantly reduced the adsorption of isopropyl ethyl thionocarbamate(IPETC)on the galena surface while having a minimal impact on *** analysis using SEM,XPS,and Raman spectra revealed that Fe^(3+)can oxidize lead sulfide to form compact lead sulfate nanoparticles on the galena surface,effectively depressing IPETC adsorption and increasing surface *** findings provide a promising solution for the efficient and environmentally responsible separation of chalcopyrite and galena.

关键词： galena chalcopyrite ferric ions flotation separation surface oxidation

Mechanism of internal thermal runaway propagation in blade batteries

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Journal of Energy Chemistry 2024年第2期89卷 184-194,I0005页

作者： Xuning feng Fangshu Zhang Wensheng Huang yong Peng Chengshan Xu Minggao Ouyang School of Vehicle and Mobility Tsinghua UniversityBeijing 100084China

Blade batteries are extensively used in electric vehicles,but unavoidable thermal runaway is an inherent threat to their safe *** study experimentally investigated the mechanism underlying thermal runaway propagation within a blade battery by using a nail to trigger thermal runaway and thermocouples to track its propagation inside a *** results showed that the internal thermal runaway could propagate for up to 272 s,which is comparable to that of a traditional battery *** velocity of the thermal runaway propagation fluctuated between 1 and 8 mm s^(-1),depending on both the electrolyte content and high-temperature gas *** the early stages of thermal runaway,the electrolyte participated in the reaction,which intensified the thermal runaway and accelerated its *** the battery temperature increased,the electrolyte evaporated,which attenuated the acceleration *** diffusion affected thermal runaway propagation through both heat transfer and mass *** experimental results indicated that gas diffusion accelerated the velocity of thermal runaway propagation by 36.84%.We used a 1D mathematical model and confirmed that convective heat transfer induced by gas diffusion increased the velocity of thermal runaway propagation by 5.46%-17.06%.Finally,the temperature rate curve was analyzed,and a three-stage mechanism for internal thermal runaway propagation was *** Stage I,convective heat transfer from electrolyte evaporation locally increased the temperature to 100℃.In Stage II,solid heat transfer locally increases the temperature to trigger thermal *** StageⅢ,thermal runaway sharply increases the local *** proposed mechanism sheds light on the internal thermal runaway propagation of blade batteries and offers valuable insights into safety considerations for future design.

关键词： lithium-ion battery Blade battery Thermal runaway Internal thermal runaway propagation

A symmetric substructuring method for analyzing the natural frequencies of conical origami structures

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Theoretical & Applied Mechanics letters 2024年第3期14卷 203-210页

作者： Chenhao lu yao Chen Weiying Fan Jian feng Pooya Sareh Key.l.boratory of Concrete and Prestressed Concrete Structures of Ministry of Education and National Prestress Engineering Research CenterSoutheast UniversityNanjing 211189China School of Engineering University of LiverpoolLiverpool L693BXUnited Kingdom Creative Design Engineering lab(Cdel) School of EngineeringNewcastle UniversityNewcastle upon Tyne NE17RUUnited Kingdom Escuela Técnica Superior de Ingeniería y Diseño Industrial Universidad Politécnica de Madrid(UPM)Madrid 28012Spain

Conical origami structures are characterized by their substantial out-of-plane stiffness and *** investigations have commonly focused on the static characteristics of these lightweight ***,the efficient analysis of the natural vibrations of these structures is pivotal for designing conicalorigami structures with programmable stiffness and *** this paper,we propose a novel method to analyzethe natural vibrations of such structures by combining a symmetric substructuring method(SSM)and a gener-alized eigenvalue *** exploits the inherent symmetry of the structure to decompose it into a finiteset of repetitive *** doing so,we reduce the dimensions of matrices and improve computationalefficiency by adopting the stiffness and mass matrices of the substructures in the generalized eigenvalue *** element simulations of pin-jointed models are used to validate the computational results of the ***,the parametric analysis of the structures demonstrates the influences of the number of seg-ments along the circumference and the radius of the cone on the structural mass and natural frequencies of ***,we present a comparison between six-fold and four-fold conical origami structures anddiscuss the influence of various geometric parameters on their natural *** study provides a strategyfor efficiently analyzing the natural vibration of symmetric origami structures and has the potential to contributeto the efficient design and customization of origami metastructures with programmable stiffness.

关键词： Natural structural vibration Origami design Group theory Symmetric substructuring method(SSM) Generalized eigenvalue analysis

Policy Network-Based Dual-Agent Deep Reinforcement learning for Multi-Resource Task Offloading in Multi-Access Edge Cloud Networks

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China Communications 2024年第4期21卷 53-73页

作者： feng Chuan Zhang Xu Han Pengchao Ma Tianchun Gong Xiaoxue School of Communications and Information Engineering Chongqing University of Posts and TelecommunicationsChongqing 400065China Institute of Intelligent Communication and Network Security Chongqing University of Posts and TelecommunicationsChongqing 400065China Key.l.boratory of Big Data Intelligent Computing Chongqing University of Posts and TelecommunicationsChongqing 400065China School of Information Engineering Guangdong University of TechnologyGuangzhou 510006China

The Multi-access Edge Cloud(MEC) networks extend cloud computing services and capabilities to the edge of the networks. By bringing computation and storage capabilities closer to end-users and connected devices, MEC networks can support a wide range of applications. MEC networks can also leverage various types of resources, including computation resources, network resources, radio resources,and location-based resources, to provide multidimensional resources for intelligent applications in 5/***, tasks generated by users often consist of multiple subtasks that require different types of resources. It is a challenging problem to offload multiresource task requests to the edge cloud aiming at maximizing benefits due to the heterogeneity of resources provided by devices. To address this issue,we mathematically model the task requests with multiple subtasks. Then, the problem of task offloading of multi-resource task requests is proved to be NP-hard. Furthermore, we propose a novel Dual-Agent Deep Reinforcement learning algorithm with Node First and link features(NF_l_DA_DRl) based on the policy network, to optimize the benefits generated by offloading multi-resource task requests in MEC networks. Finally, simulation results show that the proposed algorithm can effectively improve the benefit of task offloading with higher resource utilization compared with baseline algorithms.

关键词： benefit maximization deep reinforcement learning multi-access edge cloud task offloading

Universal insertion of molecules in ionic compounds under pressure

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National Science Review 2024年第1期11卷 120-128页

作者： feng Peng yanming Ma Chris J.Pickard Hanyu liu Maosheng Miao College of Physics and Electronic Information Luoyang Normal University Department of Chemistry and Biochemistry California State University Northridge State Key.l.boratory of Superhard Materials & Key.l.boratory of Material Simulation Methods and Software of Ministry of Education College of Physics Jilin University International Center of Future Science Jilin University Department of Materials Science & Metallurgy University of Cambridge Advanced Institute for Materials Research Tohoku University Department of Earth Science University of California Santa Barbara

Using first-principles calculations and crystal structure search methods, we found that many covalently bonded molecules such as H2, N2, CO2, NH3, H2O and CH4may react with NaC l, a prototype ionic solid,and form stable compounds under pressure while retaining their molecular structure. These molecules,despite whether they are homonuclear or heteronuclear, polar or non-polar, small or large, do not show strong chemical interactions with surrounding Na and Cl ions. In contrast, the most stable molecule among all examples, N2, is found to transform into cy.l.-N5-anions while reacting with NaC l under high pressures. It provides a new route to synthesize pentazolates, which are promising green energy materials with high energy density. Our work demonstrates a unique and universal hybridization propensity of covalently bonded molecules and solid compounds under pressure. This surprising miscibility suggests possible mixing regions between the molecular and rock layers in the interiors of large planets.

关键词： molecule-solid hybrid materials high-pressure crystal structure prediction density functional theory planet interior

Flotation separation of brucite and calcite in dodecylamine system enhanced by regulator potassium dihydrogen phosphate

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Transactions of Nonferrous Metals Society of China 2024年第8期34卷 2658-2670页

作者： Xiu-feng GONG Jin yAO Bin yANG Wan-zhong yIN yu-lian WANG ya-feng FU School of Resources and Civil Engineering Northeastern UniversityShenyang 110819China School of Chemical Engineering China University of Mining and TechnologyXuzhou 221163China School of Materials Science and Engineering Shenyang Ligong UniversityShenyang 110159China Ansteel Beijing Research Institute Co. Ltd.Beijing 102200China

To achieve efficient flotation separation of brucite and calcite,flotation separation experiments were conducted on two minerals using dodecylamine(DDA)as the collector and potassium dihydrogen phosphate(PDP)as the *** action mechanism of DDA and PDP was explored through contact angle measurement,zeta potential detection,solution chemistry calculation,FTIR analysis,and XPS *** flotation results showed that when DDA dosage was 35 mg/l and PDP dosage was 40 mg/l,the maximum floating difference between brucite and calcite was 79.81%,and the selectivity separation index was *** detection analysis showed that the main dissolved component HPO_(4)^(2−)of PDP is selectively strongly adsorbed on the Ca site on the surface of calcite,promoting the adsorption of the main dissolved component RNH_(3)^(+)of DDA on calcite surface,while brucite is basically not affected by ***,PDP is an effective regulator for the reverse flotation separation of brucite and calcite in DDA system.

关键词： brucite calcite selective adsorption flotation separation

Inhalable nanoparticles with enhanced cuproptosis and cGAS-STING activation for synergistic lung metastasis immunotherapy

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Acta Pharmaceutica Sinica B 2024年第8期14卷 3697-3710页

作者： Chongzheng yan Huaiyou lv yafei feng yuhan li Zhongxi Zhao Department of Pharmaceutics Key Laboratory of Chemical Biology of Ministry of EducationSchool of Pharmaceutical SciencesCheelloo College of MedicineShandong UniversityJinan 250012China Key University.l.boratory of Pharmaceutics&Drug Delivery Systems of Shandong Province School of Pharmaceutical SciencesCheeloo College of MedicineShandong UniversityJinan 250012China Department of Pharmacy Yantai Yuhuangding Hospital Affiliated to Qingdao UniversityYantai 264001China

Due to the insufficient Cu^(+)accumulation,Cu^(+)efflux mechanism,and highly immunosuppressive tumor microenvironment(TME)in lung metastasis,the cuproptosis efficacy is ***,an inhalable nanodevice(ClDCu)is constructed to successfully overcome the drawbacks of *** consists of a Cu^(2+)-chitosan shell and low molecular weight heparin-tocopherol succinate(lMWH-TOS,lT)core with disulfiram(DSF)*** prepared ClDCu can be inhaled and accumulate in large amounts in lung lesions(63.6%)with 56.5 times higher than intravenous *** tumor cells,the mild acidity triggers the co-release of DSF and Cu2+,thus generating bis(diethyldithiocarbamate)-copper(CuET)to block Cu^(+)efflux protein ATP7B and forming toxic Cu^(+),leading to enhanced ***,the released chitosan cooperates with ClDCu-induced cuproptosis to activate stimulator of interferon genes(STING)pathway,which significantly potentiates dendritic cells(DCs)maturation,as wells as evokes innate and adaptive *** lung metastatic mice model,ClDCu is found to induce cuproptosis and reverse the immunosuppressive TME by inhalation ***,ClDCu combined with anti-programmed cell death protein ligand-1 antibody(aPD-l1)provokes stronger antitumor ***,nanomedicine that combines cuproptosis with STING activation is a novel strategy for tumor immunotherapy.

关键词： Cuproptosis cGAS-STING activation Disulfiram Inhalation administration Tumor microenvironment PD-l1 checkpoint blockade lung metastasis Immunotherapy

Mutation in the Agrobacterium his I gene enhances transient expression in pepper

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Horticultural Plant Journal 2024年第3期10卷 809-822页

作者： Dan liu Shengnan Zhao Jubin Wang Xi Zhang yingtian Deng feng li National Key.l.boratory for Germplasm Innovation&Utilization of Horticultural Crops College of Horticulture and Forestry SciencesHuazhong Agricultural UniversityWuhanHubei 430070China

Agrobacterium-mediated plant transformation is widely used in plant genetic ***,its efficiency is limited by plant immunity against *** pepper(Capsicum annuum l.)is an important vegetable that is recalcitrant to Agrobacterium-mediated *** this work,Agrobacterium was found to induce a strong immune response in pepper,which might be the reason for T-DNA being difficult to express in *** Agrobacterium mutant screen was conducted and a point mutation in the hisI gene was identified due to a weak immune response and enhanced transient expression mediated by this Agrobacterium mutant in pepper *** genetic analysis revealed that histidine biosynthesis deficiency caused by mutations in many genes of this pathway.l.d to reduced pepper cell death,presumably due to reduced bacterial ***,mutation analysis of threonine and tryptophan biosynthesis genes showed that the biosynthesis of different amino acids may play different roles in Agrobacterium growth and stimulating the pepper immune *** possible application of Agrobacterium amino acid biosynthesis mutations in plant biology was discussed.

关键词： Capsicum annuum l. Agrobacterium Transient transformation efficiency Mutation Amino acid Immune response

Coulomb-assisted nonlocal electron transport between two pairs of Majorana bound states in a superconducting island

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Chinese Physics B 2024年第5期33卷 275-279页

作者：王浩迪任俊潼吕海峰柯莎莎 School of Physics University of Electronic Science and Technology of ChinaChengdu 610054China

We investigate the nonlocal transport modulated by Coulomb interactions in devices comprising two interacting Majorana wires,where both nanowires are in proximity to a mesoscopic superconducting(SC)*** Majorana bound state(MBS)is coupled to one lead via a quantum dot with resonant *** this device,the nonlocal correlations can be induced in the absence of Majorana energy *** find that the negative differential conductance and giant current noise cross correlation could be induced,due to the interplay between nonlocality of MBSs and dynamical Coulomb blockade *** feature may provide a signature for the existence of the MBSs.

关键词： Majorana bound states superconducting island current cross correlation