检索结果-南通市图书馆

Particuology 2023年第5期76卷 165-175页

作者： Ying Liu xinzhi wang Yurong He School of Energy Science and Engineering Harbin Institute of TechnologyHarbin150001China Heilongjiang Key Laboratory of New Energy Storage Materials and Processes School of Energy Science and EngineeringHarbin Institute of TechnologyHarbin50001China

The photothermal self-driving process of Janus microparticles has wide application prospects in the fields of *** silica and gold have good biocompatibility and high photothermal conversion efficiency,the SiO_(2)@Au Janus microparticles are widely used as drug *** on the multiphysics coupling method,the photothermal self-driving process of SiO_(2)@Au Janus microparticles was investi-gated,wherein the substrate was SiO_(2)particles and one side of the particles was coated with gold *** a continuous wave laser with irradiation of 20 W/cm^(2),the distance covered by the Janus particles was increased by increasing the thickness of the gold film and reducing the size of the SiO_(2)particles;the self-driving characteristics of the Janus particles were controlled substantially by increasing the intensity of the incident *** on the simulation results,the thermophoretic motion and Brownian motion of particles can be measured by comparing the absolute values of the thermophoretic force impulse,Brownian force impulse,and drag force *** Brownian force acting on Janus microparticles under low laser power cannot be ***,the minimum laser power required for Janus particles to overcome Brownian motion was *** results can effectively guide the design of Janus particles in biomedicine and systematically analyze the mechanism of particle thermophoretic motion during drug delivery.

关键词： Janus microparticles Photothermal self-driving Multiphysics coupling method Brownian

Solar heating assisted rapid cleanup of viscous crude oil spills using reduced graphene oxide-coated sponges

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Science China(Technological Sciences) 2020年第8期63卷 1487-1496页

作者： wang xinzhi LIU Dan CHENG Gong HUANG YuDong HE YuRong School of Energy Science and Engineering Harbin Institute of TechnologyHarbin 150001China Heilongjiang Key Laboratory of New Energy Storage Materials and Processes Harbin 150001China MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage School of Chemistry and Chemical EngineeringHarbin Institute of TechnologyHarbin 150001China

The rapid cleanup of heavy crude oil spills is challenging due to the poor mobility of highly viscous *** absorption strategies involve heating oils to a relatively high temperature to reduce their viscosity,but this method is ***,a solar-heated reduced graphene oxide(rGO)-wrapped melamine sponge(MS)was proposed to rapidly absorb *** prepared rGO-MS exhibited good hydrophobicity and oleophilicity and could be used for the rapid cleanup of oil spills from *** addition,the excellent photothermal conversion effect of rGO enabled the rGO-MS composite to achieve a solar energy absorption efficiency of 91%.Due to the localized solar energy collection and wetting properties of rGO-MS,viscous oil near the contact region was effectively heated,enabling rapid heavy oil recovery under solar light *** proposed solar heating-assisted viscous oil sorbent has great promise for use in heavy oil spill cleanups in the future.

关键词： heavy oil spill hydrophobic and oleophilic porous absorbent graphene photothermal conversion

Bio-inspired Recyclable Carbon Interface for Solar Steam Generation

在线全文

学校读者我要写书评

暂无评论

Journal of Bionic Engineering 2020年第2期17卷 315-325页

作者： Lei Shi xinzhi wang Yanwei Hu Yurong He Yuying Yan School of Energy Science and Engineering Harbin Institute of TechnologyHarbin 150001China Fluids&Thermal Engineering Research Group Faculty of EngineeringUniversity of NottinghamNG72RDUK Research Centre for Fluids and Thermal Engineering University of Nottingham Ningbo ChinaNingbo 315100China

Solar power,as one of renewable energy,holds potential application for producing steam which relies on high-temperature liquid by traditional ***,steam was generated by a bio-inspired strategy derived from the plants transpiration using a Printed Recyclable Carbon Membrane(PRCM).The membrane structure facilitated the concentration of carbon particles for the photoreaction and the heat generation for water evaporation,thereby improving the photo-thermal conversion *** PRCM achieved the best steady evaporation efficiency of 51.9%,which was 5.6 times higher than the value for water and recycling tests were *** carbon particles were separated from the water under the magnetism action,a convenient approach that avoided secondary pollution resulting from the disintegration of the *** preparation,low cost,and reusability of the printed carbon membrane allow for photo-thermal applications such as solar steam generation and seawater desalination.

关键词： solar steam generation photo-thermal conversion bionic heat transfer process magnetic control

Organic Ligand-Free Hydroformylation with Rh Particles as Catalyst

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Chinese Journal of Chemistry 2020年第2期38卷 139-143页

作者： Shujuan Liu Xingchao Dai Hongli wang xinzhi wang Feng Shi State Key Laboratory for Oxo Synthesis and Selective Oxidation Lanzhou Institute of Chemical PhysicsChinese Academy of SciencesNo.18Tianshui Middle RoadLanzhouGansu 730000China University of Chinese Academy of Sciences No.19AYuquanluBeijing 100049China Dalian National Laboratory for Clean Energy DalianLiaoning 116023China

Summary of main observation and conclusion An efficient and organic ligand-free heterogeneous catalytic system for hydroformylation of olefins is highly desirable for both academy and *** this study,simple Rh black was employed as a heterogeneous catalyst for hydroformylation of olefins in the absence of organic *** Rh black catalyst showed good catalytic activity for a broad substrate scope including the aliphatic and aromatic olefins,affording the desired aldehydes in good *** the hydroformylation of ethylene as an example,86%yield of propanal and TOF of 200 h-1 were obtained,which was superior to the reported homogeneous catalytic *** addition,the catalyst could be reused five times without loss of activity under identical reaction conditions,and the Rh leaching was negligible after each cycle.

关键词： catalyst negligible aldehydes

Analytic estimation and numerical modeling of actively cooled thermal protection systems with nickel alloys

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Chinese Journal of Aeronautics 2014年第6期27卷 1401-1412页

作者： wang xinzhi He Yurong Zheng Yan Ma Junjun H. Inaki Schlaberg School of Energy Science and Engineering Harbin Institute of Technology Shanxi Blower (Group) Company Limited School of Control and Computer Engineering North China Electric Power University

Actively cooled thermal protection system has great influence on the engine of a hypersonic vehicle, and it is significant to obtain the thermal and stress distribution in the system. So an analytic estimation and numerical modeling are performed in this paper to investigate the behavior of an actively cooled thermal protection system. The analytic estimation is based on the electric analogy method and finite element analysis（FEA） is applied to the numerical simulation. Temperature and stress distributions are obtained for the actively cooled channel walls with three kinds of nickel alloys with or with no thermal barrier coating（TBC）. The temperature of the channel wall with coating has no obvious difference from the one with no coating, but the stress with coating on the channel wall is much smaller than that with no coating. Inconel X-750 has the best characteristics among the three Ni-based materials due to its higher thermal conductivity, lower elasticity module and greater allowable stress. Analytic estimation and numerical modeling results are compared with each other and a reasonable agreement is obtained.

关键词： Active cooling Electric analogy method Nickel alloys Thermal barrier coatings Thermal protection systems

A multi-scale agent-based model of infectious disease transmission to assess the impact of vaccination and non-pharmaceutical interventions:The COVID-19 case

在线全文

学校读者我要写书评

暂无评论

Journal of Safety Science and Resilience 2021年第4期2卷 199-207页

作者： Luyao Kou xinzhi wang Yang Li Xiaojing Guo Hui Zhang Institute of Public Safety Research Tsinghua UniversityBeijing 100084PR China School of Computer Engineering and Science Shanghai UniversityShanghai 200444PR China

Mathematical and computational models are useful tools for virtual policy experiments on infectious disease *** models fail to provide flexible and rapid simulation of various epidemic scenarios for policy *** paper establishes a multi-scale agent-based model to investigate the infectious disease propagation between cities and within a city using the knowledge from person-to-person *** the model,the contact and infection of individuals at the micro scale where an agent represents a person provide insights for the interactions of agents at the meso scale where an agent refers to hundreds of *** cities with frequent population movements in China are taken as an example and actual data on traffic patterns and demographic parameters are *** scenarios for dynamic propagation of infectious disease with no external measures are compared versus the scenarios with vaccination and non-pharmaceutical *** model predicts that the peak of infections will decline by 67.37%with 80%vaccination rate,compared to a drop of 89.56%when isolation and quarantine measures are also in *** results highlight the importance of controlling the source of infection by isolation and quarantine throughout the *** also study the effect when cities implement inconsis-tent public health interventions,which is common in practical *** on our results,the model can be applied to COVID-19 and other infectious diseases according to the various needs of government agencies.

关键词： Public health Transmission risk Agent-based model Epidemic simulation Policy assessment

Synthesis of size-controlled hollow Fe3O4 nanospheres and their growth mechanism

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Particuology 2020年第2期18卷 16-23页

作者： Lei Shi Yurong He Yanwei Hu xinzhi wang Baocheng Jiang Yimin Huang Heilongjiang Key Laboratory of New Energy Storage Materials and Processes Harbin 150001China School of Energy Science and Engineering Harbin Institute of TechnologyHarbin 150001China

Size-controlled hollow Fe3O4 nanospheres were synthesized via a one-pot hydrothermal method as a function of reaction time and sodium citrate,polyacrylamide,and urea *** characterization techniques such as scanning and transmission electron microscopy and Raman spectroscopy were employed to investigate the crystal structure and morphology of the obtained *** Fe3O4 nanosphere formation mechanism was elucidated from analyzing the characterization *** levels of sodium citrate and longer reaction times were observed to increase the diameter of the nanospheres until hollow structures ***,polyacrylamide and urea promoted the formation of hollow *** hollow-structured Fe3O4 nanospheres exhibited high magnetization saturation values in the range of 48.8-58.7 emu/*** facile synthesis method described herein,to generate size-controlled Fe3O4 nanospheres with tailored properties,demonstrates potential across a wide range of fields from drug-delivery and stealth devices,to environmental and energy applications.

关键词： Fe3O4 nanoparticles Sphere size Magnetic properties

Highly sensitive color fine-tuning of diblock copolymeric nano-aggregates with tri-metallic cations,Eu(Ⅲ),Tb(Ⅲ),and Zn(Ⅱ),for flexible photoluminescence films(FPFs)

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Materials Science & Technology 2021年第6期65卷 72-81页

作者： xinzhi wang Yao wang Xinbo Zhang Wei Ding Longlong Li Linjun Huang Laurence A.Belfiore Jianguo Tang Institute of Hybrid Materials National Center of International Joint Research for Hybrid Materials TechnologyNational Base of International Sci.&Tech.Cooperation on Hybrid MaterialsQingdao UniversityQingdao 266071China Department of Chemical and Biological Engineering Colorado State UniversityColorado 80523USA

Luminescence materials have shown promise as display apparatus and lighting *** particularly interesting systems are photoluminescence materials that are capable of reversible colors emitting repeatedly on exposure to *** we report a series of color tunable flexible and transparent photoluminescence films consisting of multi-metals(Eu^(3+),Tb^(3+)and Zn^(3+))induced polymer aggregates(MIPAs)which are distributed uniformly in the polyacrylonitrile(PAN)films without *** have a unique spherical structure due to the self-assembly of polystyrene-block-polyacrylic acid(PS-b-PAA)induced by metal ***,when applied in photoluminescence devices,these photoluminescence films exhibit not only red,green,blue colors(RGB)light,but also other tuned various color light covering the whole visible range upon excitation of 345 nm through adjusting the relative ratios of metal *** the most important key point,non-conductive polymers can be used in photoluminescence devices as host medium,which is not realized in electroluminescent ***,the flexible photoluminescence films(FPFs)innovated herein exhibit the great potential to apply for flexible light-color and light-energy transformation devices.

关键词： Photoluminescence Color tunable Flexible films Polymer aggregates

Early fire detection technology based on improved transformers in aircraft cargo compartments

在线全文

学校读者我要写书评

暂无评论

Journal of Safety Science and Resilience 2024年第2期5卷 194-203页

作者： Hongzhou Ai Dong Han xinzhi wang Quanyi Liu Yue wang Mengyue Li Pei Zhu College of Civil Aviation Safety Engineering Civil Aviation Flight University of ChinaGuanghan618307China CivilAircraf Fire Science and Safety Enginring Key Laboratory of Sichuan CivilAviation Flight University of ChinaGuanghan 618307China School of Computer Engineering and Science Shanghai UniversityShanghai 200444China Key Laboratory of Civil Aviation Emergency Science&Technology Nanjing University of Aeronautics and AstronauticsNanjing 210000China

The implementation of early and accurate detection of aircraft cargo compartment fire is of great significance to ensure flight *** current airborne fire detection technology mostly relies on single-parameter smoke detection using infrared *** often results in a high false alarm rate in complex air transportation *** traditional deep learning model struggles to effectively address the issue of long-term dependency in multivariate fire *** paper proposes a multi-technology collaborative fire detection method based on an improved transformers ***-wavelength optical sensors,flue gas analyzers,and other equipment are used to carry out multi-technology collaborative detection methods and characterize various feature dimensions of fire to improve detection *** improved Transformer model which integrates the self-attention mechanism and position encoding mechanism is applied to the problem of long-time series modeling of fire information from a global perspective,which effectively solves the problem of gradient disappearance and gradient explosion in traditional RNN(recurrent neural network)and CNN(convolutional neural network).Two different multi-head self-attention mechanisms are used to classify and model multivariate fire information,respectively,which solves the problem of confusing time series modeling and classification modeling in dealing with multivariate classification tasks by a single attention ***,the output results of the two models are fused through the gate *** research results show that,compared with the traditional single-feature detection technology,the multi-technology collaborative fire detection method can better capture fire *** with the traditional deep learning model,the multivariate fire pre-diction model constructed by the improved Transformer can better detect fires,and the accuracy rate is 0.995.

关键词： Deep learning Aircraft cargo compartment Attentionmechanism Firedetection Multi-sourcedata fusion

Effect of Gastrodin on Early Brain Injury and Neurological Outcome After Subarachnoid Hemorrhage in Rats

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Neuroscience Bulletin 2019年第3期35卷 461-470页

作者： xinzhi wang Shuyue Li Jinbang Ma Chuangang wang Anzhong Chen Zhenxue Xin Jianjun Zhang Department of Neurosurgery The Second People's Hospital of LiaochengLinqing 252601China Department of Internal Medicine The Second People's Hospital of LiaochengLinqing 252601China Department of Rehabilitation Medicine The Second People's Hospital of LiaochengLinqing 252601China

Gastrodin is a phenolic glycoside that has been demonstrated to provide neuroprotection in preclinical models of central nervous system disease, but its effect in subarachnoid hemorrhage(SAH) remains unclear. In this study, we showed that intraperitoneal administration of gastrodin(100 mg/kg per day) significantly attenuated the SAH-induced neurological deficit, brain edema, and increased blood-brain barrier permeability in rats. Meanwhile, gastrodin treatment significantly reduced the SAHinduced elevation of glutamate concentration in the cerebrospinal fluid and the intracellular Ca2+ ***, gastrodin suppressed the SAH-induced microglial activation, astrocyte activation, and neuronal apoptosis. Mechanistically, gastrodin significantly reduced the oxidative stress and inflammatory response, up-regulated the expression of nuclear factor erythroid 2–related factor2, heme oxygenase-1, phospho-Akt and B-cell lymphoma2, and down-regulated the expression of BCL2-associated X protein and cleaved caspase-3. Our results suggested that the administration of gastrodin provides neuroprotection against early brain injury after experimental SAH.

关键词： Subarachnoid hemorrhage Gastrodin Early brain injury Neuroprotection Neuronal apoptosis