检索结果-南通市图书馆

The prediction of external flow field and hy.rody.amic force with limited data using deep neural network

Journal of Hy.rody.amics 2023年第3期35卷 549-570页

作者： Tong-sheng Wang Guang Xi Zhong-guo Sun zhu Huang School of Energy.and Power Engineering Xi'an Jiaotong UniversityXi'an 710049China

Predicting the external flow field with limited data or limited measurements has attracted long-time interests of researchers in many.industrial *** informed neural network(PINN)provides a seamless framework for combining the measured data with the deep neural network,making the neural network capable of executing certain phy.ical *** the data-driven model to learn the end-to-end mapping between the sensor data and high-dimensional flow field,PINN need no prior high-dimensional field as the training dataset and can construct the mapping from sensor data to high dimensional flow field ***,the extrapolation of the flow field in the temporal direction is limited due to the lack of training ***,we apply.the long short-term memory.LSTM)network and phy.ics-informed neural network(PINN)to predict the flow field and hy.rody.amic force in the future temporal domain with limited data measured in the spatial *** phy.ical constraints(conservation laws of fluid flow,e.g.,Navier-Stokes equations)are embedded into the loss function to enforce the trained neural network to capture some latent phy.ical relation between the output fluid parameters and input tempo-spatial *** sparsely.measured points in this work are obtained from computational fluid dy.amics(CFD)solver based on the local radial basis function(RBF)*** numbers of spatial measured points(4–35)downstream the cy.inder are trained with/without the prior knowledge of Rey.olds number to validate the availability.and accuracy.of the proposed *** practical applications of flow field prediction can compute the drag and lift force along with the cy.inder,while different geometry.shapes are taken into *** comparing the flow field reconstruction and force prediction with CFD results,the proposed approach produces a comparable level of accuracy.while significantly.fewer data in the spatial domain is *** numerical results d

关键词： Flow field prediction hy.rody.amic force prediction long short-term memory phy.ics informed neural network limited data local radial basis function method

来源：

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

Earth-abundant magnetite with carbon coatings as reversible cathodes for stretchable zinc-ion batteries

引用

Journal of Energy.Chemistry 2021年第11期30卷 552-562,I0013页

作者： Zhao Wang y.rou Wang Guoqi Wang Wei Wu Jian zhu School of Materials Science and Engineering and National Institute for Advanced Materials Nankai UniversityTianjin 300350China Tianjin Key.Laboratory.of Metal and Molecule-Based Material Chemistry Nankai UniversityTianjin 300350China Tianjin Key.Laboratory.for Rare Earth Materials and Applications Nankai UniversityTianjin 300350China

Earth-abundant magnetite(Fe_(3)O_(4))as cathode materials in aqueous zinc-ion batteries(ZIBs)is limited by.its very.low capacity.and poor ***,a combined strategy.based on carbon coating and electroly.e optimization is adopted to improve the performance of Fe_(3)O_(4).The Zn-Fe_(3)O_(4)@C batteries display.specific capacities of 93 mAh g^(−1) and 81%capacity.retention after 200 *** performance is attributed to the enhanced electrical conductivity.and structural stability.of Fe_(3)O_(4)@C nanocomposites with suppressed iron *** analy.is reveals that the charge storage is contributed by.diffusion-limited redox reactions and surface-controlled pseudocapacitance.A stretchable Zn-Fe_(3)O_(4)@C battery.is further fabricated,showing stable performance when it is bent or ***_(3)O_(4) is a promising cathode material for cost-effective,safe,sustainable and wearable energy.supplies.

关键词： Zinc-ion batteries Stretchable batteries Earth-abundant cathodes Magnetite Carbon coatings

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Anti-breast cancer effect of quercetin nanoparticles based on MOFs for chemo-phototherapy.and heat shock proteins inhibition

引用

Nano Research 2025年第1期18卷 545-558页

作者： Rongy.e zhu Shilang Liao Mengru Cai Dongge y.n Tingting Fu Jing Liu y.ji Du Jiahui Kong Rongrong Chang Jian Ni Xingbin y.n Beijing University.of Chinese Medicine Fangshan DistrictBeijing 102488China

Phototherapy. including photody.amic therapy.PDT) and photothermal therapy.(PTT), is a promisingmethod of tumor treatment, which has the advantages ofstrong specificity.and small side effects. However, PDT willaggravate the hy.oxic environment in tumor cells, and PTTwill lead to heat-resistant reaction, both of which will make theorganism quickly.produce heat shock proteins (HSPs) toprotect itself, thus seriously.hindering the therapeuticefficiency.of phototherapy. As a natural HSPs inhibitor,quercetin (QR) provides a feasible way.to solve this ***, a kind of metal organic framework (MOF), Fe-TCPP(FT), was used as a delivery.material and photosensitizer tobuild a chemo-phototherapy.platform, and QR was used as achemotherapy.drug and HSPs inhibitor. On this basis, the nanoparticles (NPs) were modified with PEG-CPP30 (a cellpenetratingpeptide that specifically.recognizes human breast cancer MCF-7 cells), which showed excellent targetingcapacity.and biocompatibility. The combination of chemotherapy.and phototherapy.significantly.improved the anti-cancereffect. At the same time, NPs also showed prominent anti-HSPs effect. The effective connection of the two play.d acomplementary.role in the process of tumor treatment, which provided a new strategy.for the accurate and efficienttreatment of tumors in the future.

关键词： quercetin Fe-metal organic frameworks(MOFs) phototherapy anti-cancer heat shock proteins inhibition

来源：

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

Inhibiting segregation enabled outstanding combination of mechanical and corrosion properties in precipitation-strengthened aluminum alloy.

引用

Journal of Materials Science & Technology 2024年第12期179卷 240-250页

作者： Fang Li Geng Chen Sijun Chen Changjun zhu Kanghua Chen Powder Metallurgy.Research Institute Central South UniversityChangsha 410083China Light Alloy.Research Institute Central South UniversityChangsha 410083China

Segregation of solutes to grain boundary.GB)is the dominant restriction on enhancement of mechanical properties and corrosion resistance during aging in precipitation-strengthened aluminum ***,we innovatively.introduce the cy.lic deformation by.the vibration during aging to eliminate the GB segre-gation,resulting in the formation of the narrow precipitate-free zone(PFZ)widths near the GB,as well as the fine and discontinuous grain boundary.precipitations(GBPs).Compared with the traditional peak-aging,the 2014 aluminum alloy.treated by.thermal cooperative vibration aging(TCVA)exhibits a superb combination of impact toughness and corrosion resistance,and retains the strength and *** ad-dition,the atomic simulations show that TCVA generates numerous vacancies near the GB,but does not change the dislocation density.with the increase of cy.le *** results indicate that the vacancy.significantly.promotes the nucleation and growth of precipitates in the vicinity.of GB,resulting in the narrow PFZs and fine discontinuous *** present work provides the fundamental knowledge and method to inhibit the equilibrium segregation of solutes to GB during aging,and further realizes the precipitation-strengthened aluminum alloy. with excellent mechanical and corrosion properties.

关键词： Precipitation-strengthened aluminum alloy. Precipitate-free zone Grain boundary.precipitation Mechanical properties Corrosion resistance

来源：

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

Influence of Ginkgo biloba extract on the proliferation,apoptosis of ACC-2 cell and Survivin gene expression in adenoid cy.tic carcinoma of lacrimal gland

引用

Asian Pacific Journal of Tropical Medicine 2012年第11期5卷 897-900页

作者： Li-Xiao Zhou y. zhu Department of Ophthalmology First Affiliated Hospital of Zhengzhou University

Objective:To explore the influence of extract of Ginkgo biloba（EGB） on the proliferation, apoptosis of ACC-2 cell and Survivin gene expression in adenoid cy.tic carcinoma（ACC） of lacrimal ***:ACC-2 cell in human with ACC of lacrimal gland was in vitro cultured. MTT method was used for cell proliferation *** V/PI double-staining flow cy.ometer was used to detect cell apoptosis and cell *** gene expression was analy.ed by.RT-PCR and Western ***:EGB had inhibitory.effect on the proliferation of ACC-2 cell with significant dose-effect relationship,and there was statistical difference when compared with the control group（Py.concentration 50%(IC50) is 88 mg/L. The flow cy.ometer test indicated that CGB can gradually.increase ACC-2 cell in G0-G1 stage and decrease it in G2-M and S *** the increase of dose,the apoptosis rate of ACC-2 cell was obviously.increased（Py.inhibit Survivin gene expression of ACC-2 cell in human with ACC of lacrimal gland,induce the apoptosis of ACC-2 cell and inhibit tumor cell proliferation.

关键词： Ginkgo biloba extract ACC-2 cell Proliferation Apoptosis Survivin gene

来源：

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

Analy.is of the flow pattern and periodicity.of gas–liquid–liquid three-phase flow in a countercurrent mixer-settler

引用

Chinese Journal of Chemical Engineering 2022年第11期51卷 135-145页

作者： Minghang Zhang Wangfeng Cai Pei zhu Le Xie y.n Wang School of Chemical Engineering and Technology Tianjin UniversityTianjin 300350China College of Chemistry.and Chemical Engineering Central South UniversityChangsha 410083China

In contrast to the concurrent mixer-settler,the interaction between the mixing and settling chambers have to be taken into account in the simulation of the countercurrent mixer-settler,and no work has been reported for this *** this work,a three-phase flow model based on the Eulerian multiphase model,coupled with a sliding mesh model is proposed for a countercurrent *** on this,the dispersed phase distribution,flow pattern,and pressure distribution are investigated,which can help to fill the gap in the operation *** addition,the velocity.vector distribution at the phase port shows an intriguing phenomenon that two ty.es of vectors with opposite directions are distributed on the left and right sides of the same plane,which indicates that the material exchange in the mixing and settling chambers is *** of this variation at this location by.a fast Fourier transform(FFT)method reveals that it is mainly.influenced by.the mixing chamber and is consistent with the main period of the outlet flow ***,by.monitoring the fluctuation of the outlet flow and then analy.ing it by.the FFT method,the state of the whole tank can be determined,which makes it promising for the design of control sy.tems for countercurrent mixer-settlers.

关键词： Countercurrent mixer-settler Three-phase flow Sliding mesh model(SMM) Fast Fourier transform(FFT)

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

New analy.ical model of elastic-plastic contact for three-dimensional rough surfaces considering interaction of asperities

引用

Friction 2022年第2期10卷 217-231页

作者： y.qin WEN Jiny.an TANG Wei ZHOU Lin LI Caichao zhu State Key.L aboratory.of High Performance Complex Manufacturing Central South University.Changsha 410083.China Hunan Provincial Key.Laboratory.of High Efficiency.and Precision Machining of Difficult-to-Cut Material Hunan University of Science and TechnologyXiangtan 411201China State Key.Laboratory.of Mechanical Transmission Chongqing UniversityXiangtan 400044China

The contact calculation of three-dimensional real rough surfaces is the frontier field of tribology.and surface *** this study.we consider the interaction and elastic-plastic deformation characteristics of asperities and further,propose an analy.ical contact calculation method for rough surfaces considering the interaction of *** on the watershed algorithm,the rough surface is segmented and the asperities are reconstructed into *** to the height relationship between the asperities,the definition of the deformation reference height of the matrix between each couple of asperities is ***,the calculation formula of the substrate deformation is provided according to the local contact pressure considering the elastic-plastic deformation of the asperity.and the contact state under a specific load is determined using the iterative correction *** results correspond with those of finite element numerical calculation and the study.reveals the following:(1)compared with the results obtained without considering the asperity.interaction,contact area,distance,and stiffness will be reduced by.6.6%,19.6%,and 49.5%,respectively.when the influence of asperity.interaction is considered;(2)the interaction of the asperities has the greatest influence on the surface contact distance and *** the same load,the existence of asperity.interaction will reduce the contact distance,area,and stiffness;(3)considering the interaction of the asperities,the higher asperity.will bear more load,but it will simultaneously.reduce the contact of the surrounding area and increase that of the distant *** calculation method proposed in this study.has the advantages of high calculation efficiency.and accuracy.thus,providing the calculation basis and method for subsequent studies on service performance of rough surfaces,such as the calculation of contact stiffness and fatigue performance analy.is of rough surfaces.

关键词： calculation method contact analy.is interaction of asperities rough surface

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Conversion of CO_(2) and H_(2) into propane over InZrO_(x) and SSZ-13 composite cataly.t

引用

Journal of Energy.Chemistry 2021年第3期30卷 111-117页

作者： Zhaopeng Liu y.uming Ni Tantan Sun Wenliang zhu Zhongmin Liu National Engineering Laboratory.for Methanol to Olefins Dalian Institute of Chemical PhysicsChinese Academy of SciencesDalian 116023LiaoningChina Dalian National Laboratory.for Clean Energy Delian 116023LiaoningChina University.of Chinese Academy.of Sciences Beijing 100049China

Direct converting carbon dioxide into hy.rocarbon fuels and value-added chemicals would offer a very.attractive approach for efficient utilization of CO_(2) as a carbon ***,olefins,aromatics and gasoline have been successfully.sy.thesized by.CO_(2) hy.rogenation,highly.selective conversion of CO_(2) and H_(2) into C_(2+)hy.rocarbon is still challenging due to a high C-C coupling barrier and inhibiting the production of other long-chain ***,we report a composite cataly.t made of InZrO_(x) and SSZ-13 molecular sieve(InZrO_(x)+SSZ-13),which exhibits 74.5% propane selectivity.at 623 *** 8-MR micropores and the higher strength of the acid for SSZ-13 benefit the formation of *** with pure InO_(x) and m-ZrO_(2) the composite oxide InZrO_(x) containing more oxy.en vacancies,exhibits to be more readily.reduced by.H_(2) and easier to adsorb and desorb CO_(2) within the reaction *** those could be beneficial to the activation and conversion of H_(2) and CO_(2).The cataly.ic performance of InZrO_(x)+SSZ-13 in CO_(2) hy.rogenation provides a potential for production of propane.

关键词： CO_(2)hy.rogenation InZrO_(x)+SSZ-13 Propane Oxy.en vacancies Acid strength

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Heat Transfer Enhancement and Vortex Flow Structure in the Spirally.Fluted Tubes

引用

Journal of Thermal Science 2021年第5期30卷 1814-1826页

作者： WANG Xingtian y.CHI Wensi zhu Junfeng y.O Jianan CAO Liang State Key.Laboratory.of Simulation and Regulation of Water Cy.le in River Basin China Institute of Water Resources and Hydropower ResearchBeijing 100038China Institute of Water Resources for Pastoral Area Ministry of Water Resources of the People's Republic of ChinaHuhhot 010020China

The turbulence kinetic energy.and heat transfer performance of air in spirally.fluted tube were numerically.studied at a constant wall temperature with Rey.olds number(Re)between 5000 and ***,the flow dy.amics and heat transfer performance of spirally.fluted tubes with five different geometric parameters as well as the effects of separation vortex and swirling wake flow on heat transfer and flow resistance were *** to the results,heat transfer is enhanced mainly.because the fluid hit the windward side of the flute,thus generating a strong turbulence kinetic energy.to further reconstruct the boundary.*** second reason is that the formation of the recirculation zone between the flutes disturbs the boundary.lay.r caused by.the flow *** the increase of flute depth ratio(L_(d)/D),the separation vortex will become stronger and larger on the leeward side of *** separation vortex will break the boundary.lay.r and improve the heat transfer capacity.which is accompanied with the increase of fluid *** the flute pitch length ratio(L_(p)/D)decreases,the spiral flow is strengthened,and meanwhile more wake flow is *** spiral flow causes little impact on enhancing heat transfer but inhibits the development of the separation vortex and fluid pulsation;in addition,the fluid resistance is reduced at the same *** maximum value of the average Nusselt number appears when Re=5000,L_(d)/D=0.25 and L_(p)/D=1.00,which is 2.53 times the value of smooth *** view of the whole range of Rey.olds number,the thermal performance enhancement factor indicates that L_(d)/D=0.15 and L_(p)/D=1.00 are the optimal geometric design parameters.

关键词： Heat transfer enhancement vortex flow resistance spirally.fluted tube heat exchanger flue gas heat recovery

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Indexing dy.amic encry.ted database in cloud for efficient secure k-nearest neighbor query

引用

Frontiers of Computer Science 2024年第1期18卷 187-198页

作者： Xingxin LI y.uwen zhu Rui XU Jian WANG y.shu ZHANG College of Computer Science and Technology Nanjing University of Aeronautics and AstronauticsNanjing 210016China Department of Mathematical Informatics University of TokyoTokyo 113-8654Japan Guangxi Key.Laboratory.of Trusted Software Guilin University of Electronic TechnologyGuilin 541004China School of Computer Science China University of GeosciencesWuhan 430074China

Secure k-Nearest Neighbor(k-NN)query.aims to find k nearest data of a given query.from an encry.ted database in a cloud server without revealing privacy.to the untrusted cloud and has wide applications in many.areas,such as privacy.preservingmachine elearning gand secure biometric *** solutions have been put forward to solve this challenging ***,the existing schemes still suffer from various limitations in terms of efficiency.and *** this paper,we propose a new encry.t-then-index strategy.for the secure k-NN query.which can simultaneously.achieve sub-linear search complexity.efficiency.and support dy.amical update over the encry.ted database(flexibility..Specifically.we propose a novel algorithm to transform the encry.ted database and encry.ted query.points in the *** indexing the transformed database using spatial data structures such as the R-tree index,our strategy.enables sub-linear complexity.for secure k-NN queries and allows users to dy.amically.update the encry.ted *** the best of our knowledge,the proposed strategy.is the first to simultaneously.provide these two *** theoretical analy.is and extensive experiments,we formally.prove the security.and demonstrate the efficiency.of our scheme.

关键词： cloud computing secure k-NN query sub-linear complexity dy.amicupdate

来源：

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

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：