检索结果-南通市图书馆

Unlocking the potential of thin-film composite reverse osmosis membrane performance:Insights from mass transfer modeling

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Chinese Chemical Letters 2024年第5期35卷 66-76页

作者： Kexin Yuan Yulei Liu haoran feng Yi Liu Jun Cheng Beiyang Luo Qinglian Wu Xinyu Zhang Ying Wang Xian Bao Wanqian Guo Jun Ma State Key Laboratory of Urban Water Resource and Environment School of EnvironmentHarbin Institute of TechnologyHarbin 150090China College of Architecture and Environment Sichuan UniversityChengdu 610065China School of Municipal and Environmental Engineering Shandong Jianzhu UniversityJi’nan 250101China College of Water Conservancy and Hydropower Engineering Sichuan Agricultural UniversityYaan 625014China

Thin-film composite(TFC)reverse osmosis(RO)membranes have attracted considerable attention in water treatment and desalination processes due to their specific separation ***,the trade-off effect between water flux and salt rejection poses huge challenges to further improvement in TFC RO membrane *** research works have been dedicated to optimizing membrane fabrication and modification for addressing this *** the meantime,several reviews summarized these ***,the existing reviews seldom analyzed these methods from a theoretical perspective and thus failed to offer effective optimization directions for the RO process from the root *** this review,we first propose a mass transfer model to facilitate a better understanding of the entire process of how water and solute permeate through RO membranes in detail,namely the migration process outside the membrane,the dissolution process on the membrane surface,and the diffusion process within the ***,the water and salt mass transfer behaviors obtained from model deduction are comprehensively analyzed to provide potential guidelines for alleviating the trade-off effect between water flux and salt rejection in the RO ***,inspired by the theoretical analysis and the accurate identification of existing bottlenecks,several promising strategies for both regulating RO membranes and optimizing operational conditions are proposed to further exploit the potential of RO membrane *** review is expected to guide the development of high-performance RO membranes from a mass transfer theory standpoint.

关键词： Reverse osmosis Mass transfer model Trade-off effect Membrane performance Optimization strategies

在线全文

学校读者我要写书评

暂无评论

人工智能刑事主体地位的否定和反思

江西警察学院学报 2024年第1期 65-71页

作者：冯浩然武汉大学湖北武汉430072

人工智能的快速发展影响着刑法适用,尤其是刑事主体资格问题。根据智能程度的不同,人工智能分为弱和强两种类型,但其辨认和控制能力都仅达到事实层面,且行为欠缺刑法所要求的客观要素和主观要素。人工智能无法承担刑罚后果,不能实现刑... 详细信息

人工智能的快速发展影响着刑法适用,尤其是刑事主体资格问题。根据智能程度的不同,人工智能分为弱和强两种类型,但其辨认和控制能力都仅达到事实层面,且行为欠缺刑法所要求的客观要素和主观要素。人工智能无法承担刑罚后果,不能实现刑罚的预防目的和诸多功能,无法适应现行的刑罚体系。人工智能同样不具有类似法人成为拟制主体的条件。当涉及人工智能的犯罪时,仍需坚持自然人主义,由设计者、生产者与使用者承担刑事责任。

关键词：人工智能刑事责任犯罪主体刑事责任能力

Two stream skeleton behavior recognition algorithm based on Motif-GCN

在线全文

学校读者我要写书评

暂无评论

High Technology Letters 2023年第4期29卷 397-405页

作者：吴进 WANG Lei feng haoran CHONG Gege School of Electronic Engineering Xi′an University of Posts and TelecommunicationsXi′an 710121P.R.China

Compared with RGB videos and images,human bone data is less vulnerable to external factors and has stronger ***,behavior recognition methods based on skeletons are widely *** graph convolution network(GCN)can deal with the irregular topology data of hu-man skeletons very well,more and more researchers apply GCN to human behavior ***-ditional graph convolution methods only consider the joints with physical connectivity or the same type when building the behavior recognition model based on human skeletons structure,which cannot capture higher-order information *** solve this problem,Motif-GCN is used in this paper to ex-tract spatial *** relationship between the joints with natural connection in the human body is encoded by the first Motif-GCN,and the possible relationship between the unconnected joints in the human skeleton is encoded by the second *** this way,the relationship between non-physical joints can be *** a two stream framework combining joint and bone informa-tion is used to capture more action ***,experiments are conducted on two subdata-sets X-Sub and X-View of NTU-RGB+D,and the accuracy shown in Top-1 classification results is 89.5%and 95.4%*** experimental results are 1.0%and 0.3%higher than those of the 2S-AGCN model *** superiority of this method is also proved by the experimental results.

关键词： skeleton behavior recognition Motif-GCN two stream network

布雷顿循环冷端空冷换热器设计与变工况运行特性分析

在线全文

学校读者我要写书评

暂无评论

热力发电 2024年第4期53卷 63-72页

作者：王伟冯浩然岳娜雒青张建元耿如意张国龙西安热工研究院有限公司陕西西安710054 西安交通大学能源与动力工程学院陕西西安710049 中车哈尔滨车辆有限公司黑龙江哈尔滨150056

作为布雷顿循环系统中的重要冷端部件,气体冷却器的性能对循环系统结构紧凑性和运行高效性有重要影响。分析了一种新型横流印刷电路板式换热器(printed circuit heat exchanger,PCHE)—板翅混合式气体冷却器的工作性能及影响因素,对该... 详细信息

作为布雷顿循环系统中的重要冷端部件,气体冷却器的性能对循环系统结构紧凑性和运行高效性有重要影响。分析了一种新型横流印刷电路板式换热器(printed circuit heat exchanger,PCHE)—板翅混合式气体冷却器的工作性能及影响因素,对该种换热器建立了一个数值计算模型,并编写MATLAB程序验证其可靠性;基于此,对该类冷却器进行了设计,其功率密度均在1 MW/m^(3)以上,属于紧凑型换热器;其次进行了变工况性能分析,给出了冷却器的压降和换热性能随循环工质和冷却空气进口状态的变化规律,并比较了布雷顿循环工质为超临界二氧化碳、氮气、空气时冷却器的换热特性和压降特性,结果表明,冷、热流体流量的改变对换热特性的影响最明显。研究结果对布雷顿循环空冷换热器的设计与运行具有参考意义。

关键词：布雷顿循环空冷换热器变工况计算换热特性压降特性

同方期刊数据库博看期刊评论

在线全文

学校读者我要写书评

暂无评论

高校青年教师思想政治工作的主体性建构

浙江工贸职业技术学院学报 2024年第1期24卷 53-56页

作者：郭志平姚会彦冯浩然浙江海洋大学浙江舟山316022

高校青年教师的思想政治工作事关高校立德树人根本任务的全面落实。加强和改进高校青年教师思想政治工作,就要在把握高校青年教师思想政治工作的现状和主体性认知规律基础上,推动高校青年教师在主体性认知中坚定使命担当,在协同发展中... 详细信息

高校青年教师的思想政治工作事关高校立德树人根本任务的全面落实。加强和改进高校青年教师思想政治工作,就要在把握高校青年教师思想政治工作的现状和主体性认知规律基础上,推动高校青年教师在主体性认知中坚定使命担当,在协同发展中推动高校青年教师思想政治工作的主体性建构。

关键词：高校青年教师思想政治工作主体性建构

Annealing engineering induced high thermoelectric performance in Yb-filled CoSb_(3) skutterudites

在线全文

学校读者我要写书评

暂无评论

Journal of Materials Science & Technology 2023年第19期150卷 168-174页

作者： haoran feng Qian Deng Yan Zhong Xuri Rao Yadong Wang Jianglong Zhu Fujie Zhang Ran Ang Key Laboratory of Radiation Physics and Technology Ministry of EducationInstitute of Nuclear Science and TechnologySichuan UniversityChengdu 610064China Institute of New Energy and Low-Carbon Technology Sichuan UniversityChengdu 610065China

The great pressure of energy shortage has made CoSb_(3) materials with excellent mechanical stability in the mid-temperature region favored for the integration of thermoelectric ***,their ex-cessive lattice thermal conductivity and poor Seebeck coefficient lead to low energy conversion *** Yb into the lattice void to optimize the band structure and regulate the chemical po-tential is an indispensable means for improving the thermoelectric properties of CoSb_(3)-based materials,while the phase structure and thermoelectric properties vary with the preparation *** motivates the current work to focus on the influence of annealing temperature on the microstructure and thermoelectric properties of Yb-filled CoSb_(3).Experimental analysis and theoretical model eluci-dated that an increase in annealing temperature can optimize the Yb filling fraction,which simulta-neously manipulates the band structure as well as chemical potential,resulting in an excellent electrical ***,the phase and microstructure characterization clarify that the annealing temperature can effectively affect the grain *** complex grain boundary induced by grain refinement,more filled Yb atoms and precipitates strongly scatter wide-frequency phonons,significantly suppressing the lattice thermal *** a result,a superior dimensionless figure of merit(ZT)value of~1.33 at 823 K and an average ZTave of~0.9(323-823 K)were achieved in the Ybo.4Co4Sb12 sample annealed at 923 K,and the calculated conversion efficiency could reach~13%.This work pro-vides a unique paradigm to improve thermoelectrics in the filled CoSb_(3)-based skutterudites by annealing engineering.

关键词： CoSb_(3)skutterudite Annealing engineering Grain refinement Phonon scattering Thermoelectric optimization

A stepwise approach to enhancing flotation of low-grade zinnwaldite through the cationic/DL-2-octanol/anionic reagent combinations: Behavior and mechanism analysis

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

International Journal of Mining Science and Technology 2024年第6期34卷 881-891页

作者： Zhonghua Xue Yali feng haoran Li Jinrong Ju Xingquan Dua School of Civil and Resource Engineering University of Science and Technology BeijingBeijing 100083China Key Laboratory of Biochemical Engineering Institute of Process EngineeringChinese Academy of SciencesBeijing 100190China University of Chinese Academy of Sciences Beijing 100049China

In order to alleviate the pressure on the supply of lithium resources,this research proposes the use of binary/ternary collectors with high selectivity and collecting ability to enhance the flotation purification of low-grade zinnwaldite *** binary collector is a mixture of dodecylamine polyoxyethylene ether and DL-2-octanol.A binary collector is added first,followed by sodium oleate,known as a ternary *** acidic conditions,the recovery of Li2O in the concentrate was increased by 8.26%with the binary collector and 13.70%with the ternary collector,compared to the dodecylamine polyoxyethylene *** binary collector enhanced the dispersibility of the single collector,while co-adsorption strengthened the hydrophobic nature of the zinnwaldite ***,zinnwaldite particles,after the application of binary collector,displayed inter-particle flocculation and attachment to bubbles within 60109 m compared to other *** collector exhibited the capacity to lower critical micelle concentration and surface tension,subsequently inducing a denser and thicker hydrophobic layer through electrostatic forces,hydrophobic interactions,and chemical *** objective of this research is to facilitate the recovery of lithium resources from low-grade ores in order to meet the needs of sustainable development.

关键词： Zinnwaldite Molecular dynamics simulation Flotation Ternary collector Extended DLVO theory

A method for establishing a bearing residual life prediction model for process enhancement equipment based on rotor imbalance response analysis

在线全文

学校读者我要写书评

暂无评论

Chinese Journal of Chemical Engineering 2024年第2期66卷 203-215页

作者： feng Wang haoran Li Zhenghui Zhang Yan Bai Hong Yin Jing Bian National Foundation Research Laboratory of Fault Prevention and Control in Hazardous Chemicals Production System Engineering Research Center of Chemical Technology SafetyBeijing University of Chemical TechnologyBeijing 100029China China Nuclear Power Engineering Co. LtdBeijing 100840China CNOOC Tianjin Chemical Research and Design Institute Co. LtdTianjin Key Laboratory of Energy and Chemical Explosion SafetyAcademician Expert Collaborative Innovation CenterTianjin 300131China

A rotating packed bed is a typical chemical process enhancement equipment that can strengthen micromixing and mass *** the operation of the rotating packed bed,the nonreactants and products irregularly adhere to the wire mesh packing in the rotor,thus resulting in an imbalance in the vibration of the rotor,which may cause serious damage to the bearing and material *** study proposes a model prediction for estimating the bearing residual life of a rotating packed bed based on rotor imbalance response *** method is used to determine the influence of the mass on the imbalance in the vibration of the rotor on bearing *** major influence on rotor vibration was found to be exerted by the imbalanced mass and its distribution radius,as revealed by the results of orthogonal *** implementing finite element analysis,the imbalance response curve for the rotating packed bed rotor was obtained,and a correlation among rotor imbalance mass,distribution radius of imbalance mass,and bearing residue life was established via data *** predicted value of the bearing life can be used as the reference basis for an early safety warning of a rotating packed bed to effectively avoid accidents.

关键词： Rotating packed bed Mass imbalance Harmonic response analysis Residual life Prediction model

Structure Engineering of Layered Double Hydroxides(LDHs)for Heterogeneous Catalysis

在线全文

学校读者我要写书评

暂无评论

Chemical Research in Chinese Universities 2024年第4期40卷 590-610页

作者： GAO Zhexi MA haoran WANG Qian LI Dianqing feng Junting DUAN Xue State Key Laboratory of Chemical Resource Engineering Beijing Engineering Center for Hierarchical CatalystsBeijing University of Chemical TechnologyBeijing100029P.R.China Quzhou Institute for Innovation in Resource Chemical Engineering Quzhou324000P.R.China

Layered double hydroxide(LDH)is regarded as an advanced platform material in catalysis and attracts vast attrition *** a kind of two-dimensional layered material,it exhibits great advantages including cation-tunability in layer,lattice limitation,topological transformation,ion exchange and intercalation *** also can be used as building blocks for composite catalytic *** 100 years,a large number of works have been accomplished and researchers made great progress on investigating the LDH-based catalytic *** this review,we summarize representative achievements and significant progress in recent years,which mainly include constructing high entropy catalytic material,high dispersion/stability and interfacial supported catalytic material,composite catalytic materials and nano-reactor based on ***,through collecting the excellent works,we conclude the future development potential of LDH and provide a perspective.

关键词： Layered double hydroxide(LDH)material Heterogeneous catalysis Structure engineering