检索结果-内蒙古大学图书馆

SSRN 2023年

作者： Zhang, Fengjun Zhang, Defang Wang, Luyang Zhang, Kan Key Laboratory of Functional Molecule Design and Interface Process Anhui Key Laboratory of Advanced Building Materials Anhui Jianzhu University Anhui Hefei230601 China School of Materials Science and Engineering School of Chemistry and Chemical Engineering Nanjing University of Science and Technology Nanjing210094 China College of New Materials and New Energies Shenzhen Technology University Guangdong Shenzhen518118 China Department of Chemical and Biomolecular Engineering China

Direct H2O2 synthesis (DHS) from H2 and O2 over Pd catalyst is a potentially rewarding strategy to replace the industrial anthraquinone method, but the sluggish hydrogenation process seriously impedes production efficiency in pure water. Here, we report a lattice strained Pd catalyst which is formed on Au nanorods (NRs) tips by taking advantage of curvature. The lattice strained Pd tipped Au NRs (PTA) is found to be able to facilitate the H+ ion heterolysis, in particular with light illumination, thereby remarkably enhancing the DHS performance. The lattice strain effect together with light-induced hot electrons enables a production rate of 0.12 mol/g/h for H2O2 generation, which is 3.11 and 3.56 times higher than that of no light assistance or strain effect ones, respectively. Finally, a porous PTA film was assembled, which achieves a H2O2 concentration of ~2.3% within 24 h that is expected to make for direct medical use ( © 2023, The Authors. All rights reserved.

关键词： Surface plasmons

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Low Anisotropy and Excellent Energy Absorption of Additively Manufactured Porous Ti-6al-4v Alloy Consisting of Disordered Trapezo-Rhombic Dodecahedron Cell Structures

SSRN

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SSRN 2024年

作者： Zhao, Rusheng Guo, Shiyue Zhang, Fan Zhang, Wen Yang, Dongsheng Yue, Xuezheng Guo, Xiangyu Tang, Huiling Liu, Yang Hubei Longzhong Laboratory Xiangyang441000 China Graduate School of Systems Design Tokyo Metropolitan University Tokyo1910065 Japan The State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Wuhan430070 China School of Mechanical Engineering Hunan University of Science and Technology Xiangtan411201 China School of Materials Science and Engineering University of Shanghai for Science and Technology Shanghai200082 China Wuhan University of Technology China

Additive manufacturing (AM) can fabricate porous metals with exceptional characteristics for lightweight structural applications and energy absorption. The mechanical properties of porous metals are determined by porosity, cell shape, cell size, and loading direction. In this study, porous Ti-6Al-4V samples with ordered and disordered cellular structures were manufactured using the laser powder bed fusion (L-PBF) process, and the anisotropic compression behavior under different regularities was systematically investigated. The results show that samples with ordered cellular structures exhibited higher compressive strength under z-axis compression but were prone to shear band formation under x- and y-axis compression, leading to a significant reduction in strength. As regularity decreased, shear bands gradually disappeared, and the samples exhibited more uniform plastic deformation. Notably, when the regularity coefficient R = 0.8, the samples showed the best overall mechanical performance in all directions, including the highest plastic collapse strength and energy absorption capacity. With decreasing regularity, the anisotropy of the porous structures also decreased. Additionally, when R = 0.4, the anisotropy of mechanical performance parameters was minimized;however, when R = 0.8, the overall performance of the mechanical parameters was optimal. These results indicate that effectively adjusting the regularity of the pore structure is key to achieving isotropy and optimizing overall mechanical performance. Compared to simply choosing ordered cells, adjusting the regularity of the cell structure can achieve excellent mechanical properties and reduce anisotropy, which is of significant value for lightweight structures and energy absorption applications. © 2024, The Authors. All rights reserved.

关键词： Anisotropy

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A Follow-Up to an Age-Friendly Protocol to Support Investigations of Autonomous Driving Disengagement on Driver Safety: Results and Recommendations 25th

A Follow-Up to an Age-Friendly Protocol to Support Investiga...

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25th International Conference on Human-Computer Interaction, HCII 2023

作者： Brightman, Kirsten Van Benthem, Kathleen Herdman, Chris Wallace, Bruce Lochbihler, Aidan Sloan, Will Knoefel, Frank Marshall, Shawn Advanced Cognitive Engineering Laboratory Faculty of Arts and Social Sciences Carleton University OttawaONK1S 5B6 Canada Department of Systems and Computer Engineering Faculty of Engineering and Design Carleton University OttawaONK1S 5B6 Canada AGE-WELLNIH-SAM OttawaONK1N5C8 Canada Bruyère Research Institute OttawaONK1N 5C8 Canada Faculty of Medicine University of Ottawa OttawaONK18L6 Canada Bruyère Continuing Care OttawaONK1N 5C8 Canada

ISBN: (纸本)9783031492143

Driving cessation in old age is linked to negative mental and physical health outcomes. Autonomous vehicles offer an opportunity to maintain independence and mobility for older adults. However, vehicle automation can compromise driver engagement, posing risks to drivers and the public. The concern is particularly significant for older and novice drivers who are already overrepresented in accident statistics. Driving simulators provide a safe environment to evaluate performance and assess driver skills and engagement. This study employed a specialized protocol to accommodate older drivers and minimize the adverse effects of simulated driving. The complete number of participants included older (n = 13) and novice drivers (n = 9), who underwent manual and semi-autonomous driving simulations. Results included positive impacts of the simulator modifications with only two dropouts (both from the older group) resulting in a total dropout rate of 9% (15% of older drivers). Driver engagement varied between driving conditions, with superior performance in responding to surprise events during manual driving condition. © 2024, The Author(s), under exclusive license to Springer Nature Switzerland AG.

关键词： Autonomous vehicles

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Integration of Mixture of Experts and Multimodal Generative AI in Internet of Vehicles: A Survey

arXiv

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arXiv 2024年

作者： Xu, Minrui Niyato, Dusit Kang, Jiawen Xiong, Zehui Jamalipour, Abbas Fang, Yuguang Kim, Dong In Shen, Xuemin The School of Computer Science and Engineering Nanyang Technological University Singapore639798 Singapore The School of Automation Guangdong University of Technology Key Laboratory of Intelligent Information Processing and System Integration of IoT Ministry of Education Guangzhou510006 China Guangdong-HongKong-Macao Joint Laboratory for Smart Discrete Manufacturing Guangzhou510006 China The Pillar of Information Systems Technology and Design Singapore University of Technology and Design Singapore487372 Singapore The School of Electrical and Information Engineering University of Sydney SydneyNSW2006 Australia Department of Computer Science City University of Hong Kong Kowloon Hong Kong The Department of Electrical and Computer Engineering Sungkyunkwan University Suwon16419 Korea Republic of The Department of Electrical and Computer Engineering University of Waterloo WaterlooONN2L 3G1 Canada

Generative AI (GAI) can enhance the cognitive, reasoning, and planning capabilities of intelligent modules in the Internet of Vehicles (IoV) by synthesizing augmented datasets, completing sensor data, and making sequential decisions. In addition, the mixture of experts (MoE) can enable the distributed and collaborative execution of AI models without performance degradation between connected vehicles. In this survey, we explore the integration of MoE and GAI to enable Artificial General Intelligence in IoV, which can enable the realization of full autonomy for IoV with minimal human supervision and applicability in a wide range of mobility scenarios, including environment monitoring, traffic management, and autonomous driving. In particular, we present the fundamentals of GAI, MoE, and their interplay applications in IoV. Furthermore, we discuss the potential integration of MoE and GAI in IoV, including distributed perception and monitoring, collaborative decision-making and planning, and generative modeling and simulation. Finally, we present several potential research directions for facilitating the integration. © 2024, CC BY.

关键词： Integration

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A Tendon-Driven Actuator with Cantilever Initiated Variable Stiffness Used for Robotic Fingers

SSRN

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SSRN 2024年

作者： Li, Chenning Yang, Shangkui Branson, David T. Song, Zhibin Sun, Tao Dai, Jiansheng Kang, Rongjie Key Laboratory of Mechanism Theory and Equipment Design of Ministry of Education School of Mechanical Engineering Tianjin University Tianjin300072 China Advanced Manufacturing Technology Research Group Faculty of Engineering University of Nottingham NottinghamNG7 2RD United Kingdom Beijing Institute of Technology China Shenzhen Key Laboratory of Intelligent Robotics and Flexible Manufacturing Systems Southern University of Science and Technology Shenzhen518055 China

Variable stiffness actuators (VSAs) have emerged as a key actuation technology known for their bionic performance and task adaptability. However, current VSAs often exhibit relatively large sizes, making them possible for use in robotic arms and legs but less convenient for integrations into robotic hands. This paper introduces a compact design of a tendon-driven variable stiffness actuator (TVSA) based on an adjustable cantilever mechanism, which can be embedded into a robotic finger. This implementation endows the robotic finger with the decoupled regulation of joint position and stiffness. A concise and computationally efficient stiffness mapping model from the TVSA to the finger joints is then established, providing a theoretical foundation for the stiffness regulation of the tendon-driven fingers. A prototype of a robotic hand equipped with the presented TVSA demonstrates safe interactions with various objects with diverse shapes, weights and stiffness. © 2024, The Authors. All rights reserved.

关键词： Stiffness

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The PIWI-specific insertion module helps load longer piRNAs for translational activation essential for male fertility

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Science China(Life Sciences) 2023年第7期66卷 1459-1481页

作者： Xin Wang Di-Hang Lin Yue Yan An-Hui Wang Jiaoyang Liao Qian Meng Wen-Qing Yang Heng Zuo Min-Min Hua Fengjuan Zhang Hongwen Zhu Hu Zhou Tian-Yu Huang Rui He Guangyong Li Yue-Qiu Tan Hui-Juan Shi Lan-Tao Gou Dangsheng Li Ligang Wu Yonggang Zheng Xiang-Dong Fu Jinsong Li Rujuan Liu Guo-Hui Li Mo-Fang Liu Key Laboratory of Systems Health Science of Zhejiang Province School of Life ScienceHangzhou Institute for Advanced StudyUniversity of Chinese Academy of SciencesHangzhou310024China State Key Laboratory of Molecular Biology State Key Laboratory of Cell BiologyShanghai Key Laboratory of Molecular AndrologyShanghai Institute of Biochemistry and Cell BiologyCenter for Excellence in Molecular Cell ScienceChinese Academy of SciencesUniversity of Chinese Academy of SciencesShanghai200031China Laboratory of Molecular Modeling and Design State Key Laboratory of Molecular Reaction DynamicsDalian Institute of Chemical PhysicsChinese Academy of SciencesDalian116023China Department of Analytical Chemistry and CAS Key Laboratory of Receptor Research Shanghai Institute of Materia MedicaChinese Academy of SciencesShanghai201203China School of Life Science and Technology ShanghaiTech UniversityShanghai201210China NHC Key Lab of Reproduction Regulation(Shanghai Institute for Biomedical and Pharmaceutical Technologies) Fudan UniversityShanghai200032China Key Laboratory of Fertility Preservation and Maintenance of Ministry of Education School of Basic Medical SciencesNingxia Medical UniversityYinchuan750004China Department of Urology General Hospital of Ningxia Medical UniversityNingxia Medical UniversityYinchuan750004China Institute of Reproductive and Stem Cell Engineering College of Basic of MedicineCentral South UniversityChangsha410000China Department of Physiology Howard Hughes Medical InstituteUniversity of Texas Southwestern Medical CenterDallasTX75390USA Westlake Laboratory of Life Sciences and Biomedicine School of Life SciencesWestlake UniversityHangzhou310024China

PIWI-clade proteins harness pi RNAs of 24–33 nt in *** great puzzles are how PIWI-clade proteins incorporate pi RNAs of different sizes and whether the size matters to PIWI/pi RNA *** we report that a PIWI-Ins module unique in PIWIclade proteins helps define the length of pi *** of PIWI-Ins in Miwi shifts MIWI to load with shorter pi RNAs and causes spermiogenic failure in mice,demonstrating the functional importance of this regulatory ***,we show that longer pi RNAs provide additional complementarity to target m RNAs,thereby enhancing the assembly of the MIWI/e IF3f/Hu R super-complex for translational ***,we identify a c.1108C>T(p.R370W)mutation of HIWI(human PIWIL1)in infertile men and demonstrate in Miwi knock-in mice that this genetic mutation impairs male fertility by altering the property of PIWI-Ins in selecting longer pi *** findings reveal a critical role of PIWI-Ins-ensured longer pi RNAs in fine-tuning MIWI/pi RNA targeting capacity,proven essential for spermatid development and male fertility.

关键词： PIWI piRNAs PIWI-Ins translational activation spermatid development male fertility

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Semi-coherent and coherent nanoprecipitation induced superior strength-ductility combination in additively manufactured CoCrMoW alloy

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Journal of Materials Science & Technology 2026年 242卷 1-14页

作者： Canjuan Xiao Weijin Cai Ruidi Li Song Ni Wenting Jiang Zhangwei Wang Khurram Yaqoob Zibin Chen Yi Huang Min Song State Key Laboratory of Powder Metallurgy Central South University Changsha 410083 China College of Materials and Advanced Manufacturing Hunan University of Technology Zhuzhou 412007 China School of Chemical and Materials Engineering National University of Sciences and Technology H-12 Islamabad Pakistan Research Institute for Advanced Manufacturing Department of Industrial and Systems Engineering The Hong Kong Polytechnic University Hong Kong 999077 China Department of Design and Engineering Faculty of Science and Technology Bournemouth University Poole Dorset BH12 5BB UK Materials Research Group Department of Mechanical Engineering University of Southampton Southampton SO17 1BJ UK

The interface coherence between precipitates and the matrix—whether coherent, semi-coherent, or incoherent—significantly impacts both the strength and ductility of metallic materials. An optimal balance between these properties can be achieved through manipulation of the precipitate/matrix interface. In this study, 1 wt.% and 2 wt.% TiN nanoparticles were introduced into a laser powder bed fusion (LPBF) fabricated CoCrMoW alloy as a reinforcing phase. Compared to the unreinforced alloy, the alloy with 1 wt.% TiN exhibited substantial improvements in yield strength, ultimate tensile strength, and fracture elongation, increasing from 876 MPa, 1190 MPa, and 15 % to 1071 MPa, 1421 MPa, and 17 %, respectively. Although the addition of TiN nanoparticles did not significantly affect the average grain size, it inhibited the formation of fine grains at the fusion line and influenced the overall grain size distribution. More importantly, the incorporation of TiN nanoparticles during the LPBF process led to the in-situ formation of semi-coherent precipitates rich in Ti and N, as well as coherent precipitates rich in Ti, N, and O. The semi-coherent precipitates, which exhibit well-defined orientation relationships and periodic misfit dislocations, enhanced strength by blocking stacking faults and ε laths. They also preserved plasticity by promoting self-relaxation through twinning at intersected areas, thus preventing crack nucleation at the interface. Furthermore, the chemical inhomogeneity between the coherent phase and the matrix increased resistance to dislocation cutting of the precipitates, thereby improving the material’s strength without compromising ductility.

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Explainable Semantic Communication for Text Tasks

arXiv

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arXiv 2023年

作者： Liu, Chuanhong Guo, Caili Yang, Yang Ni, Wanli Zhou, Yanquan Li, Lei Quek, Tony Q.S. The Beijing Key Laboratory of Network System Architecture and Convergence School of Information and Communication Engineering Beijing University of Posts and Telecommunications Beijing100876 China The Beijing Laboratory of Advanced Information Networks School of Information and Communication Engineering Beijing University of Posts and Telecommunications Beijing100876 China Department of Electronic Engineering Tsinghua University Beijing100084 China School of Artificial Intelligence Beijing University of Posts and Telecommunications Beijing100876 China The Dept. of Information Systems Technology and Design Singapore University of Technology and Design Singapore487372 Singapore

Task-oriented semantic communication has gained increasing attention due to its ability to reduce the amount of transmitted data without sacrificing task performance. Although some prior efforts have been dedicated to developing semantic communications, the semantics in these works remains to be unexplainable. Challenges related to explainable semantic representation and knowledge-based semantic compression have yet to be explored. In this paper, we propose a triplet-based explainable semantic communication (TESC) scheme for representing text semantics efficiently. Specifically, we develop a semantic extraction method to convert text into triplets while using syntactic dependency analysis to enhance semantic completeness. Then, we design a semantic filtering method to further compress the duplicate and task-irrelevant triplets based on prior knowledge. The filtered triplets are encoded and transmitted to the receiver for completing intelligent tasks. Furthermore, we apply the propsed TESC scheme to two emblematic text tasks: sentiment analysis and question answering, in which the semantic codec is meticulously customized for each task. Experimental results demonstrate that 1) TESC scheme outperforms benchmarks in terms of Top-1 accuracy and transmission efficiency, and 2) TESC scheme enjoys about 150% performance gain compared to the traditional communication method. Copyright © 2023, The Authors. All rights reserved.

关键词： Semantics

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Research on Cable EM interference Based on Multi-conductor Transmission Lines 4

Research on Cable EM interference Based on Multi-conductor T...

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4th IEEE International Conference on Electronic Information and Communication Technology, ICEICT 2021

作者： Xu, Rongyu Mao, Delong Zhang, Hui Xu, Ping Li, Yingsong Jiang, Tao Wuhan Second Ship Design and Research Institute Wuhan China Systems Engineering Research Institute Beijing China College of Info. and Comm. Engineering Harbin Engineering University Harbin China Key Laboratory of Advanced Marine Communication and Information Technology Ministry of Industry and Information Technology Harbin Engineering University Harbin China

ISBN: (纸本)9781665432030

Multi-conductor transmission lines can be used in electromagnetic compatible simulation which has good agreement with the test results. In this paper, a model of three transmission lines is established which described the electromagnetic interference of typical high-power equipment to sensitive equipment. Test platform is also established and the simulation results are basically consistent with the test results which verified the effectiveness of the model. ©2021 IEEE

关键词： Radar cross section

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Finite-Time Synchronization of Flux-Controlled Complex-Valued Memristive Neural Networks

Finite-Time Synchronization of Flux-Controlled Complex-Value...

引用

Neuromorphic Computing (ICNC), International Conference on

作者： Yonghuan Wang Leimin Wang Genping Wu School of Automation China University of Geosciences Hubei Key Laboratory of Advanced Control and Intelligent Automation for Complex Systems Engineering Research Center of Intelligent Technology for Geo-Exploration Ministry of Education Wuhan China Wuhan Second Ship Design and Research Institute Wuhan China

In this paper, by using the flux-controlled memristor model, the finite-time synchronization problem of delayed complex-valued memristive neural networks (MCNNs) is studied. Firstly, according to the proposed memristor model, we model the MCNNs as continuous systems on voltage-flux-time $(\wp, \varpi, t)$ domain. Then, we design a class of approaches to realize state synchronization between the drive and response systems, and the corresponding synchronization conditions are achieved. Finally, the effectiveness of results is illustrated with the simulations.

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