检索结果-内蒙古大学图书馆

49th International Congress and Exposition on Noise Control Engineering, INTER-NOISE 2020

作者： Yang, Xiaoyin Kang, Jian School of Architecture Harbin Institute of Technology Key Laboratory of Cold Region Urban and Rural Human Settlement Environment Science and Technology Ministry of Industry and Information Technology NO. 73 Huanghe Road Nangang District Harbin China UCL Institute for Environmental Design and Engineering Bartlett University College London LondonWC1H0NN United Kingdom

ISBN: (纸本)9788994021362

Waterscape has a positive impact on the preference of public space. This study investigated three fountains in Harbin, China, to explore whether their dynamic visual form and corresponding sound rhythm change would affect the sound preference evaluation of the waterscapes. In total, 150 visitors were selected to answer a questionnaire on site, on how they perceived the fountain, including its visual and acoustic environment. It was found from the field experiment that people had different preferences for the sound of waterscape. The waterscape was then classified and subjectively evaluated in laboratory from visual and auditory aspects. The results show that, the evaluation of the rhythm of several kinds of water had little difference when there was no visual stimuli, but participants preferred dynamic visual form to steady-state continuous form, in which the significant rhythm change was more acceptant. The higher the score of visual form was, the better the evaluation of waterscape was. In general, in this study a significant positive correlation was observed between the dynamic visual form of fountain and the preference of waterscape. © Proceedings of 2020 International Congress on Noise Control Engineering, INTER-NOISE 2020. All rights reserved.

关键词： Fountains

来源：评论

学校读者我要写书评

暂无评论

Federated Learning over Coupled Graphs

arXiv

引用

arXiv 2023年

作者： Lei, Runze Wang, Pinghui Zhao, Junzhou Lan, Lin Tao, Jing Deng, Chao Feng, Junlan Wang, Xidian Guan, Xiaohong The MOE Key Laboratory for Intelligent Networks and Network Security Xi’an Jiaotong University P.O. Box 1088 No. 28 Xianning West Road Shaanxi Xi’an710049 China China Mobile Research Institute China China Mobile Group Design Institute China The Center for Intelligent and Networked Systems Tsinghua National Lab for Information Science and Technology Tsinghua University Beijing100084 China

Graphs are widely used to represent the relations among entities. When one owns the complete data, an entire graph can be easily built, therefore performing analysis on the graph is straightforward. However, in many scenarios, it is impractical to centralize the data due to data privacy concerns. An organization or party only keeps a part of the whole graph data, i.e., graph data is isolated from different parties. Recently, Federated Learning (FL) has been proposed to solve the data isolation issue, mainly for Euclidean data. It is still a challenge to apply FL on graph data because graphs contain topological information which is notorious for its non-IID nature and is hard to partition. In this work, we propose a novel FL framework for graph data, FedCog, to efficiently handle coupled graphs that are a kind of distributed graph data, but widely exist in a variety of real-world applications such as mobile carriers’ communication networks and banks’ transaction networks. We theoretically prove the correctness and security of FedCog. Experimental results demonstrate that our method FedCog significantly outperforms traditional FL methods on graphs. Remarkably, our FedCog improves the accuracy of node classification tasks by up to 14.7%. Copyright © 2023, The Authors. All rights reserved.

关键词： Graph neural networks

来源：评论

学校读者我要写书评

暂无评论

A Crystal Plasticity Model with Irradiation Effect for the Mechanical Behavior of FCC Metals

引用

Acta Mechanica Solida Sinica 2019年第6期32卷 675-687页

作者： Jnnfeng Nie Yunpeng Liu Pandong Lin Qihao Xie Zhanli Liu Institute of Nuclear and New Energy Technology Collaborative Innovation Center of Advanced Nuclear Energy TechnologyKey Laboratory of Advanced Reactor Engineering and Safety of Minis try of EducationTsinghua UniversityBeijing 100084China Applied Mechanics Lab. School of Aerospace EngineeringTsinghua UniversityBeijing 100084China Data Science and Information Technology Research Center Tsinghua-Berkeley Shenzhen InstituteShenzhen 518055China

In this paper,a crystal plasticity model considering the irradiation effect based on the thermal activation theory is *** evolutions of screw dislocations,edge dislocations,and stacking fault tetrahedrals(SFTs)(induced by irradiation)are included into the *** interactions between dislocations and irradiation-induced SFTs are also *** constitutive model is numerically implemented on the ABAQUS platform through UMAT subroutine and applied to study the irradiation effect on the mechanical behavior of pure *** mechanical properties of single and polycrystalline copper are studied,and the simulation results show that the constitutive model can properly predict the mechanical behavior of irradiated pure *** for polycrystalline copper,the simulation results are in good agreement with the experimental data.

关键词： Crystal plasticity Irradiation effect Uniaxial tension Dislocation FCC crystal

来源：评论

学校读者我要写书评

暂无评论

A robust mechanistic approach to prediction of departure from nucleate boiling 14

A robust mechanistic approach to prediction of departure fro...

引用

14th International Nuclear Fuel Cycle Conference, GLOBAL 2019 and Light Water reactor Fuel Performance Conference, TOP FUEL 2019

作者： Zhao, Xingang Shirvan, Koroush Salko, Robert K. Department of Nuclear Science and Engineering Massachusetts Institute of Technology 77 Massachusetts Avenue CambridgeMA02139 United States Reactor and Nuclear Systems Division Oak Ridge National Laboratory P.O. Box 2008 Oak RidgeTN37831 United States

The critical heat flux (CHF) corresponding to the departure from nucleate boiling (DNB) is a regulatory limit for licensing of pressurized water reactors. Under DNB conditions, the heated surface is permanently blanketed by a vapor film, leading to a sharp deterioration of the heat transfer coefficient at the heater/coolant interface and an abrupt temperature rise. Unfortunately, the path for an accurate, robust prediction of DNB has been elusive due to lack of consensus on its triggering mechanism. This work reviews existing physics-driven modeling tools. An evolutionary channel-scale mechanistic model that leverages key assumptions in the relatively well-accepted mechanisms of liquid sublayer dryout and near-wall bubble crowding is then proposed. Detailed validation of the proposed model has demonstrated its improved predictive capabilities over previous data/physics-driven models for an extensive DNB-specific CHF test matrix covering a wide range of flow conditions. The unique feature of the proposed model lies in its ability to predict DNB without recalibration for different heater geometries (including round tube, annulus, and rod bundle), which is essential in deciphering fuel performance metrics from different facilities and reactor types. The proposed model will be implemented in fuel performance codes to help improve modeling of transient DNB scenarios such as during a reactivity-initiated accident. Copyright © GLOBAL 2019 - International Nuclear Fuel Cycle Conference and TOP FUEL 2019 - Light Water reactor Fuel Performance *** rights reserved.

关键词： Heat flux

来源：评论

学校读者我要写书评

暂无评论

Global Dynamics and Optimal design of a New Highly Efficient Nonlinear Energy Sink Based on Magnetic-Elastic Impacts with Negative Stiffness

Research Square

引用

Research Square 2021年

作者： Li, Shuangbao Wang, Tingting Chen, Jianen Research Institute of Science and Technology Innovation Civil Aviation University of China Tianjin300300 China College of Science Civil Aviation University of China Tianjin300300 China Tianjin Key Laboratory for Advanced Mechatronic System Design and Intelligent Control School of Mechanical Engineering Tianjin University of Technology Tianjin300384 China

A new highly efficient elastic-impact bistable nonlinear energy sink (EI-BNES) based on magnetic-elastic impacts with negative stiffness and bistability is proposed and optimized through global dynamical analysis. The EI-BNES has better robustness and higher energy dissipation rates with nearly more than 96.5% for broadband impulsive excitations than the traditional cubic NESs and single bistable NESs. The structure of negative stiffness impacts is realized by reasonable layout of permanent ring magnets and springs. A two-degree-of-freedom (two-DOF) elastic-impact system is established to describe the coupled nonlinear interaction between the main structure and the attached EI-BNES. A global Melnikov reduction analysis (GMRA) is proposed to study global dynamics and homoclinic bifurcations of the reduced two-dimensional subsystem, which is used to explain the mechanism of nonlinear targeted energy transfer (TET) and detect the threshold of impulsive amplitudes of EI-BNES for in-well and compound motions between in-well and cross-well resonance responses. A special type of saddle-center equilibrium points is also found in the non-smooth system of the EI-BNES and can be used to effectively increase the energy dissipation rates. The optimal design criterion of the tuned EI-BNES for better dissipation performance is also first discussed based on the GMRA and numerical techniques for calculating the Melnikov function of the non-smooth systems. The effectiveness of the analytical GMRA is also verified by numerical simulations. © 2021, CC BY.

关键词： Stiffness

来源：评论

学校读者我要写书评

暂无评论

Multifunctional Supramolecular Polymer Hydrogel Chelated with Copper Ions for Enhanced Diabetic Wound Healing

SSRN

引用

SSRN 2024年

作者： Lu, Daoqiang Qi, Fei Wang, Xiu Fu, Qiang Li, Jie Yang, Fang Li, Riwang Wang, Jun Liu, Dahai Zhao, Xiaodong Guangdong Provincial Key Laboratory of Animal Molecular Design and Precise Breeding School of Animal Science and Technology Foshan University Guangdong Foshan528231 China Guangzhou Institutes of Biomedicine and Health Chinese Academy of Sciences Guangdong Guangzhou510280 China School of Medicine Foshan University Guangdong Foshan528000 China School of Food Science and Engineering Foshan University Guangdong Foshan528000 China School of Clinical Medicine Anhui Medical College Anhui Hefei232200 China Foshan Fosun Chancheng Hospital Fosun Group Guangdong Foshan528031 China

Hydrogel wound dressings had shown promising potential in the treatment of diabetic wounds;however, the complexity of the diabetic wound microenvironment and the lack of integrated treatment strategies had still limited their therapeutic efficacy. In this study, we synthesized a series of multifunctional hydrogel adhesives with anti-inflammatory, antibacterial, and angiogenesis-promoting properties using free radical polymerization, with methacrylated hyaluronic acid (HAMA), 3-(bis(pyridin-2-ylmethyl)amino)propyl methacrylate (DPAMA), N-[tris(hydroxymethyl)methyl]acrylamide (THMA) as raw materials. Copper ions were incorporated into the hydrogels due to their strong affinity for dipicolylamine and carboxylic acid groups. The results indicated that the prepared hydrogel exhibited good adhesion and mechanical properties, allowing it to closely adhere to the skin while being easy to remove without causing any trauma. Antibacterial tests showed significant inhibition of Escherichia coli (E. coli) and Staphylococcus aureus (S. aureus), which was attributed to the sustained release of Cu2+, effectively suppressing bacterial growth. Additionally, ELISA kit assays demonstrated that the HTDC2 (containing 1.5 mg/mL Cu2+) hydrogel significantly reduced the expression of TNF-α and IL-1β. In vivo, the HTDC2 hydrogel significantly promoted wound healing in a full-thickness skin wound model of diabetic mice. The results of angiogenesis, immunofluorescence, and immunohistochemistry further confirmed that HTDC2 hydrogel promoted angiogenesis and reduced the expression of pro-inflammatory factors. In conclusion, the supramolecular polymer hydrogel we proposed is an ideal dressing for the treatment of diabetic wounds. © 2024, The Authors. All rights reserved.

关键词： Escherichia coli

来源：评论

学校读者我要写书评

暂无评论

Shape and Force Sensing of A Soft SMA Planar Actuator for Soft Robots

Shape and Force Sensing of A Soft SMA Planar Actuator for So...

引用

IEEE International Conference on Robotics and Biomimetics

作者： Yiming Ouyang Hu Jin Haoyao Chen Jingwen Kong Weihua Li Shiwu Zhang CAS Key Laboratory of Mechanical Behavior and Design of Materials University of Science and Technology of China Hefei China School of Mechanical Engineering and Automation Harbin Institute of Technology (Shenzhen) Shenzhen China School of Mechanical Materials Mechatronic and Biomedical Engineering University of Wollongong Wollongong NSW Australia

ISBN: (纸本)9781665405362

Due to the large deformation and diversity of soft structures, many convenient sensors are hard to be used in soft robots/actuators. Although many novel flexible sensors have been developed in recent years, it is still difficult to accurately sense the shape and force of soft robots/actuators. In this paper, a shape sensing method and a variable-stiffness beam model are proposed to realize the shape and one-dimensional external force sensing, based on the SMA planar actuator(SPA) structure, with a strain gauge array sensing system. A shape reconstruction experiment and a force sensing experiment of a variable external force were implemented and the results validated the effectiveness and the accuracy of the above sensing methods, which extend application capability of the SMA-based soft actuator.

关键词： Actuators Shape Force Estimation Soft robotics Robot sensing systems Strain measurement

来源：评论

学校读者我要写书评

暂无评论

How to Stop Groundwater Drawdown in North China Plain? Combining Agricultural Management Strategies and Climate Change

SSRN

引用

SSRN 2024年

作者： Ou, Junji Ding, Beibei Feng, Puyu Chen, Yong Yu, Lili Liu, De Li Srinivasan, Raghavan Zhang, Xueliang College of Land Science and Technology State Key Laboratory of Efficient Utilization of Agri-cultural Water Resources China Agricultural University Beijing100193 China General Institute of Water Resources and Hydropower Planning and Design Ministry of Water Resources Beijing100120 China NSW Department of Primary Industries Wagga Wagga Agricultural Institute Wagga WaggaNSW2650 Australia Climate Change Research Centre University of New South Wales Sydney2052 Australia Department of Ecosystem Science and Management Texas A&M University College StationTX77843 United States

The global crisis of groundwater depletion is becoming a challenge in irrigation agriculture. How to optimize the agricultural system in the context of climate change to halt the groundwater decline as well as minimize the crop yield reductions is crucial for water and food security around the world. In this study, the multiple cropping index (MCI) reducing strategy and irrigation-limiting strategy were assessed using the SWAT-GW model in the piedmont plain of Taihang Mountains of North China Plain (NCP). To rationalize the model performance, we first calibrated and validated the crop parameters of spring maize (SPM) based on field data aiming at an NRMSE below 25%, and adopted other calibrated parameters in terms of winter wheat (WW), summer maize (SUM), evapotranspiration, and groundwater variations. During the historical period (1993-2012), the simulated scheme of a two-year-three-crop system (WW-SUM→SPM) with 82 mm of irrigation quota (3H2Y_O) was recommended to maintain shallow groundwater equilibrium with 27% loss of yield production, that is, both MCI-reducing strategy and irrigation-limiting strategy (defined as a "double-reducing strategy") should be applied. With the effect of increasing groundwater recharge due to future climate change, shallow groundwater equilibrium is expected to be achieved through the irrigation limiting strategy alone (defined as a "single-reducing strategy") during 2030-2049. As the wheat and maize (including summer maize and spring maize) are expected to increase by 5.8%-6.9% and 1.2%-2.3% during 2030-2049, crop production under the "single-reducing strategy" could be mostly stable in comparison with the historical situation. During 2070-2089, the more precipitation would transfer into more groundwater recharge, the study area could maintain groundwater equilibrium mainly under the 2H1Y of WW-SUM with the full irrigation scheme (i.e., the current agricultural system, so defined as a "non-reducing strategy"), especially under the S

关键词： SWAT

来源：评论

学校读者我要写书评

暂无评论

Cover Picture: Enhancing Electrochemical Performance through Swift Functional Group Tuning of MXenes (Batteries & Supercaps 8/2024)

引用

Batteries & Supercaps 2024年第8期7卷

作者： Penghui Cui Hejing Wang Dr. Bowen Yang Shu Dong Dr. Menggai Jiao Dr. Ruizheng Zhao Prof. Kai Zhu Dr. Yong-Zheng Fang Prof. Zhen Zhou Prof. Dianxue Cao Key Laboratory of Superlight Materials and Surface Technology (Ministry of Education) College of Material Science and Chemical Engineering Harbin Engineering University Harbin 150001 China Department: Interdisciplinary Research Center for Sustainable Energy Science and Engineering (IRC4SE2) Zhengzhou University School of Chemical Engineering Zhengzhou University Zhengzhou 450001 Henan China Key Laboratory of Cold Region Urban and Rural Human Settlement Environment Science and Technology Ministry of Industry and Information Technology School of Architecture and Design Harbin Institute of Technology Harbin 150001 China

来源：评论

学校读者我要写书评

暂无评论

Mapping the Antiparallel Aligned Stripe Domain Rotation by Microwave Excitation

SSRN

引用

SSRN 2024年

作者： Zhang, Jing Cui, Yuanzhi Wang, Xiaoyu Wang, Chuang Liu, Mengchen Xu, Jie Li, Kai Zhao, Yunhe Lu, Zhenyan Pan, Lining Jin, Chendong Liu, Qingfang Wang, Jianbo Wang, Fangzhou Adam, Roman Schneider, Claus Michael Cao, Derang College of Physics Qingdao University Qingdao266071 China National Demonstration Center for Experimental Applied Physics Education Qingdao University Qingdao266071 China SKLSM Institute of Semiconductors Chinese Academy of Sciences Beijing100083 China College of Chemistry Chemical Engineering and Resource Utilization Northeast Forestry University Harbin150040 China Hunan Provincial Key Laboratory of Intelligent Sensors and Advanced Sensor Materials School of Physics and Electronics Hunan University of Science and Technology Xiangtan411201 China CAS Key Laboratory of Magnetic Materials and Devices Ningbo Institute of Materials Technology and Engineering Chinese Academy of Sciences Ningbo315201 China Hebei University China Key Laboratory of Special Functional Materials and Structural Design Ministry of Education Lanzhou University Lanzhou730000 China Key Laboratory of Optic-Electronic Information and Materials of Hebei Province Research Center for Computational Physics College of Physics Science and Technology Hebei University Baoding071002 China Peter Grünberg Institute Forschungszentrum Jülich Jülich52425 Germany Faculty of Physics University of Duisburg-Essen Duisburg47057 Germany Department of Physics University of California Davis DavisCA95616-5270 United States

The evolution process of magnetic domains to external fields is crucial for the modern understanding and application of spintronics. In this study, we investigated the domain rotation of antiparallel-aligned stripe domains through their response to microwave excitation. The excitation was conducted in four orientations defined by the microwave field, magnetic field, and stripe direction, allowing for a comprehensive characterization of the domain's evolution. Our results, which are reproducible and consistent with micromagnetic simulations, provide additional approaches and techniques for comprehending the microscopic mechanisms of magnetic domains and characterizing their rotation. © 2024, The Authors. All rights reserved.

关键词： Magnetic domains

来源：评论

学校读者我要写书评

暂无评论

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

请选择保存的检索档案：

请选择收藏分类：

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

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

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：