检索结果-内蒙古大学图书馆

材料展望（英文） 2022年第1期 9-31页

作者： J Y Zhang Z Q Zhou Z B Zhang M H Park Q Yu Z Li J Ma A D Wang H G Huang M Song B S Guo Q Wang Y Yang Department of Mechanical Engineering College of EngineeringCity University of Hong KongKowloon TongKowloonHong KongPeople's Republic of China Shenzhen Key Laboratory of High Performance Nontraditional Manufacturing College of Mechatronics and Control EngineeringShenzhen UniversityShenzhenGuangdong 518060People's Republic of China School of Materials Science and Engineering Dongguan University of TechnologyDongguanGuangdong 523808People's Republic of China Institute of Materials China Academy of Engineering PhysicsJiangyouSichuan 621907People's Republic of China State Key Laboratory of Powder Metallurgy Central South UniversityChangshaHunan 410083People's Republic of China Department of Mechanical Engineering College of EngineeringCity University of Hong KongKowloon TongKowloonHong KongPeople's Republic of China Institute of Advanced Wear & Corrosion Resistant and Functional Materials Jinan UniversityGuangzhouGuangdong 510632People's Republic of China Institute of Materials Laboratory for MicrostructuresShanghai UniversityShanghai 200444People's Republic of China Department of Mechanical Engineering College of EngineeringCity University of Hong KongKowloon TongKowloonHong KongPeople's Republic of China Department of Materials Science and Engineering College of EngineeringCity University of Hong KongKowloon TongKowloonHong KongPeople's Republic of China Department of Advanced Design and System Engineering College of EngineeringCity University of Hong KongKowloon TongKowloonHong KongPeople's Republic of China

Metallic glasses(MGs)or amorphous alloys are an important engineering material that has a history of research of about 80-90 *** different fast cooling methods were developed for multi-component MGs between 1960s and 1980s,1990s witnessed a surge of research interest in the development of bulk metallic glasses(BGMs).Since then,one central theme of research in the metallic-glass community has been compositional design that aims to search for MGs with a better glass forming ability,a larger size and/or more interesting properties,which can hence meet the demands from more important *** this review article,we focus on the recent development of chemically complex MGs,such as high entropy MGs,with new tools that were not available or mature yet until recently,such as the state-of-the-art additive manufacturing technologies,high throughput materials design techniques and the methods for big data analyses(*** learning and artificial intelligence).We also discuss the recent use of MGs in a variety of novel and important applications,from personal healthcare,electric energy transfer to nuclear energy that plays a pivotal role in the battle against global warming.

关键词： metallic glasses amorphous alloys alloy design additive manufacturing machine learning high throughput materials design

来源：评论

学校读者我要写书评

暂无评论

Learning Local Feature Descriptor with Motion Attribute For Vision-based Localization

Learning Local Feature Descriptor with Motion Attribute For ...

引用

2019 IEEE/RSJ International Conference on Intelligent Robots and systems (IROS)

作者： Yafei Song Di Zhu Jia Li Yonghong Tian Mingyang Li AI Labs Alibaba Group Hangzhou China National Key Laboratory of Virtual Reality Technology and System School of Computer Science and Engineering Beihang University Beijing China National Engineering Laboratory for Video Technology School of Electronics Engineering and Computer Science Peking University Beijing China

In recent years, camera-based localization has been widely used for robotic applications, and most proposed algorithms rely on local features extracted from recorded images. For better performance, the features used for open-loop localization are required to be short-term globally static, and the ones used for re-localization or loop closure detection need to be long-term static. Therefore, the motion attribute of a local feature point could be exploited to improve localization performance, e.g., the feature points extracted from moving persons or vehicles can be excluded from these systems due to their unsteadiness. In this paper, we design a fully convolutional network (FCN), named MD-Net, to perform motion attribute estimation and feature description simultaneously. MD-Net has a shared backbone network to extract features from the input image and two network branches to complete each sub-task. With MD-Net, we can obtain the motion attribute while avoiding increasing much more computation. Experimental results demonstrate that the proposed method can learn distinct local feature descriptor along with motion attribute only using an FCN, by outperforming competing methods by a wide margin. We also show that the proposed algorithm can be integrated into a vision-based localization algorithm to improve estimation accuracy significantly.

关键词：

来源：评论

学校读者我要写书评

暂无评论

Utilizing Cationic Vacancies and Spontaneous Polarization on Cathode to Enhance Zinc-Ion Storage and Inhibit Dendrite Growth in Zinc-Ion Batteries

引用

Angewandte Chemie 2023年第26期135卷

作者： Dr. Liqi Bai Zihan Hu Cheng Hu Songge Zhang Dr. Yiran Ying Yingge Zhang Lu Li Hanfang Zhang Dr. Nan Li Dr. Shanshan Shi Shuo Liu Dr. Lin Hao Tongyao Liu Prof. Hongwei Huang Prof. Haitao Huang Prof. Yihe Zhang Engineering Research Center of Ministry of Education for Geological Carbon Storage and Low Carbon Utilization of Resources Beijing Key Laboratory of Materials Utilization of Nonmetallic Minerals and Solid Wastes National Laboratory of Mineral Materials School of Material Sciences and Technology China University of Geosciences Beijing 100083 China Department of Applied Physics and Research Institute for Smart Energy The Hong Kong Polytechnic University Hung Hom Kowloon Hong Kong 999077 China Contribution: Writing - original draft (lead) Writing - review & editing (lead) Faculty of System Design and Intelligent Manufacturing Southern University of Science and Technology Nanshan District Shenzhen Guangdong 518055 China Songshan Lake Materials Laboratory Guangdong 523808 China School of Fashion and Textiles and Research Institute for Intelligent Wearable Systems The Hong Kong Polytechnic University Hung Hom Kowloon Hong Kong 999077 China

来源：评论

学校读者我要写书评

暂无评论

Ionic liquid choline chloride-urea dissolving cattle bone extracted hydroxyapatite

引用

Journal of Bionanoscience 2018年第3期12卷 437-441页

作者： Song, Wei Yang, Yan Deng, Yu Tianjin Key Laboratory for Advanced Mechatronic System Design and Intelligent Control Tianjin University of Technology Tianjin300384 China National Demonstration Center for Experimental Mechanical and Electrical Engineering Education Tianjin University of Technology Tianjin300384 China Department of Osteo-Internal Medicine Tianjin Hospital Tianjin300211 China School of Materials Science and Chemical Engineering Tianjin University of Science and Technology Tianjin300457 China

The dissolving technique of ionic liquid (IL) was applied in extraction process of hydroxyapatite (HAp). Product HAp was extracted by IL choline chloride-urea (ChCl-Urea) dissolving cattle bone. The optimum conditions for regeneration process of cattle bone were determined by single factor, orthogonal and verification experiments. IR spectra of regenerated bone, undissolved bone and raw bone showed that the main groups of regenerated bone did not change. It was indicated that ionic liquid did not damage the bone collagen of raw bone, and the collagen was only dissolved by IL. IR spectrum of the product HAp revealed that its components were similar to those of the natural bone. SEM pattern showed that the crystal shape of the product HAp appeared rod-like shape mostly, and the crystal structure was relatively complete. XRD diffraction explained that there was no difference between product HAp and standard HAp for the crystalline form and compositions. Copyright © 2018 American Scientific Publishers All rights reserved.

关键词： Hydroxyapatite

来源：评论

学校读者我要写书评

暂无评论

Motion Planning for Heterogeneous Unmanned systems under Partial Observation from UAV

arXiv

引用

arXiv 2020年

作者： Chen, Ci Wan, Yuanfang Li, Baowei Wang, Chen Xie, Guangming Jiang, Huanyu College of Biosystems Engineering and Food Science Zhejiang University Hangzhou310058 China National Engineering Research Center for Software Engineering Peking University Beijing100871 China State Key Laboratory of Turbulence and Complex Systems Intelligent Biomimetic Design Lab College of Engineering Peking University Beijing100871 China Department of Ocean Science and Engineering Southern University of Science and Technology Shenzhen518055 China Peng Cheng Laboratory Shenzhen518055 China

For heterogeneous unmanned systems composed of unmanned aerial vehicles (UAVs) and unmanned ground vehicles (UGVs), using UAVs serve as eyes to assist UGVs in motion planning is a promising research direction due to the UAVs’ vast view scope. However, due to UAVs flight altitude limitations, it may be impossible to observe the global map, and motion planning in the local map is a POMDP (Partially Observable Markov Decision Process) problem. This paper proposes a motion planning algorithm for heterogeneous unmanned system under partial observation from UAV without reconstruction of global maps, which consists of two parts designed for perception and decision-making, respectively. For the perception part, we propose the Grid Map Generation Network (GMGN), which is used to perceive scenes from UAV’s perspective and classify the pathways and obstacles. For the decision-making part, we propose the Motion Command Generation Network (MCGN). Due to the addition of memory mechanism, MCGN has planning and reasoning abilities under partial observation from UAVs. We evaluate our proposed algorithm by comparing with baseline algorithms. The results show that our method effectively plans the motion of heterogeneous unmanned systems and achieves a relatively high success rate. Copyright © 2020, The Authors. All rights reserved.

关键词： Unmanned aerial vehicles (UAV)

来源：评论

学校读者我要写书评

暂无评论

Optimum design of High Frequency Transformer Based on Winding Spacing

Optimum Design of High Frequency Transformer Based on Windin...

引用

International Conference on Electrical Machines and systems (ICEMS)

作者： Zhiran Peng Guangsen Wang Xiaofei Zhai Xiao Zhang Hao Zhou Chenglin Yi National Key Laboratory of Science and Technology on Vessel Integrated Power System Naval University of Engineering Wuhan China Daqo kaifan electric co. Nanjing China

ISBN: (纸本)9781728133997

When designing a series resonant converter, a resonant inductor is usually connected on series in the circuit which leads to an increase in the weight of the device. If the leakage inductance of the transformer is used as a resonant inductor, the weight will be reduced, but the high-frequency leakage flux will bring higher losses. In order to solve this problem, this paper deduces the analytical expression of leakage inductance with respect to winding spacing by magnetic field partitioning method, and constructs a mathematical model about the weight of series resonant inductor. The minimum weight is set as the optimization target, the transformer efficiency as constraints. The Fmincon function in matlab is used to obtain the optimal value of the winding spacing. A three-winding transformer prototype with rated working frequency of 15 kHz and rated power of 25 kW was designed and wounded through this method. The experimental results of the transformer were consistent with the theoretical calculations. The optimization method in this paper can provide reference for the design of high frequency transformers for series resonant converters.

关键词： Windings Inductance Magnetic cores Inductors Oil insulation Power transformer insulation RLC circuits

来源：评论

学校读者我要写书评

暂无评论

Corrigendum to “The encountering dune fields in a bidirectional flow system in the northwestern South China Sea: Pattern, morphology, and recent dynamics” [Geomorphology 406 (2022) 108210]

引用

Geomorphology 2022年 413卷

作者： Xiaochuan Ma Jinyuan Li Jun Yan Xingru Feng Yongdong Song Tao Xu Lihua Zhuang Zhendong Luan Jianxing Zhang CAS Key Laboratory of Marine Geology and Environment Institute of Oceanology Chinese Academy of Sciences Qingdao China Laboratory for Marine Geology Qingdao National Laboratory for Marine Science and Technology Qingdao China Center for Ocean Mega-Science Chinese Academy of Sciences Qingdao China School of Ocean Sciences China University of Geosciences (Beijing) Beijing China Longyuan (Beijing) Wind Power Engineering Design Consulting Co. Ltd Beijing 100083 China CAS Key Laboratory of Ocean Circulation and Waves Institute of Oceanology Chinese Academy of Sciences Qingdao China

来源：评论

学校读者我要写书评

暂无评论

Deployable antenna mechanism with class of modular truss based on tetrahedral combination unit

引用

Hangkong Xuebao/Acta Aeronautica et Astronautica Sinica 2020年第3期41卷 423219页

作者： Guo, Jinwei Huang, Zhirong Xu, Yundou Guo, Luyao Yao, Jiantao Zhao, Yongsheng Parallel Robot and Mechatronic System Laboratory of Hebei Province Yanshan University Qinhuangdao066004 China Xi'an710100 China Key Laboratory of Advanced Forging & Stamping Technology and Science of Ministry of National Education Yanshan University Qinhuangdao066004 China

To solve the complex structure, the low folding rate, and the large number of motion pairs of the existing tetrahedral-based truss antenna mechanism, a class of new modular deployable structure is proposed based on the 3RR-3RRR tetrahedral combination unit and the 3RR-3URU tetrahedral symmetric combination unit. The modular structure consisting of three combination units is selected as the analysis object. First, the composition of the modular structure and the axis arrangement of the Hook hinges are introduced in detail, and the number and property of the Degree of Freedom (DOF) of the combination unit itself are obtained by applying the idea of link-demolishing-equivalent-restoration, the screw theory and the G-K formula. Second, the motion simulation of the two modular structures is carried out by using Adams dynamics simulation software. The simulation results verified the correctness of the DOF analysis. The folding rate of the mechanism is characterized by the ratio of the space volume occupied by the mechanism when fully unfolding and fully folding. The folding rates of the existing non-modular mechanisms and modular mechanisms based on tetrahedral unit are calculated. Finally, the number of DOF and motion pairs, the folding rate of non-modular mechanisms and modular mechanisms are compared and analyzed. The analysis results show that the modular structure based on the 3RR-3URU tetrahedral symmetrical combination unit can achieve a large folding rate, and the number of degree of freedom and motion pairs are also relatively reduced. In addition, fewer types of links are use when forming large antennas. The research results provide a theoretical basis for the design and analysis of such modular truss deployable antenna structures. © 2020, Press of Chinese Journal of Aeronautics. All right reserved.

关键词： Trusses

来源：评论

学校读者我要写书评

暂无评论

Learning local feature descriptor with motion attribute for vision-based localization

arXiv

引用

arXiv 2019年

作者： Song, Yafei Zhu, Di Li, Jia Tian, Yonghong Li, Mingyang AI Labs Alibaba Group Hangzhou311121 China National Engineering Laboratory for Video Technology School of Electronics Engineering and Computer Science Peking University Beijing100871 China National Key Laboratory of Virtual Reality Technology and System School of Computer Science and Engineering Beihang University Beijing100191 China

关键词： Machine learning

来源：评论

学校读者我要写书评

暂无评论

The Effect of External Weight Distribution on Muscle Activation Pattern during Obstacle Negotiation for Male Participants

引用

Proceedings of the Human Factors and Ergonomics Society Annual Meeting 2019年第1期63卷 37 - 41页

作者： Guofu Yi Xinting Wang Junxia Zhang Shuai Hao Boyi Hu School of Mechanical Engineering Tianjin University of Science and Technology Tianjin ChinaTianjin Key Laboratory of Integrated Design and On-line Monitoring for Light Industry & Food Machinery and Equipment Human System Engineering Laboratory Department of Industrial and Systems Engineering University of Florida Gainesville FL USA

Effects of different age groups and different external loading distribution on lower extremity muscle activation during obstacle crossing tasks were tested in this study. Four young participants and five healthy senior participants performed different walking tasks at their own speed carrying multiple different weights while their lower extremity muscle activation patterns were recorded and compared. Older adults showed significantly increased muscle activation patterns in obstacle negotiation. Furthermore, participants showed altered lower extremity muscle activation patterns with different load distribution.

关键词： weight distribution obstacle crossing obstacle contact surface myoelectricity (EMG) falling

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：