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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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Numerical Comparison of Transpiration Cooling designs Using Real Gas Effects and Approximate Gas Model

Numerical Comparison of Transpiration Cooling Designs Using ...

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作者： Meng Wang Jianhua Wang Fei He Kang Qian Yadong Wu Guangsheng Zhu CAS Key Laboratory of Mechanical Behaviour and Design of Materials Department of Thermal Science and Energy EngineeringUniversity of Science and Technology of China Beijing Institute of Astronautical System Engineering

In the severe high-temperature environment caused by aerodynamic heating,the vibrational excitation,dissociation and ionization of gas may successively occur,which are known as real gas *** the real gas effects,the thermodynamic properties of gas vary drastically and significantly influence the performances of the active thermal protection system of hypersonic vehicles,especially in the case with coolant outflow,for example transpiration *** paper numerically investigates the transpiration cooling performance with the consideration of the interaction between coolant outflow and hypersonic flow under the real gas *** mathematical models and coupled numerical strategy are firstly validated by experimental data,then the influences of real gas effects on the transpiration cooling of a wedged leading edge(WLE) are studied under a flight Mach number range from 8 to 12 and a flight height of 40 *** analysis and discussions of the numerical results reveal some important phenomena and demonstrate the need to consider real gas effects.

关键词： Transpiration cooling real gas effects porous media hypersonic vehicles high-temperature environment

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The relationship between orthopedic clinical imaging and bone strength prediction

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Medicine in Novel technology and Devices 2021年第1期9卷 9-17页

作者： He Gong Meng Zhang Shaowei Jia Linwei Lv Key Laboratory for Biomechanics and Mechanobiology of Ministry of Education Beijing Advanced Innovation Center for Biomedical EngineeringSchool of Biological Science and Medical EngineeringBeihang UniversityBeijingChina Department of Engineering Mechanics Nanling CampusJilin UniversityChangchun130025China Tianjin Key Laboratory for Advanced Mechatronic System Design and Intelligent Control School of Mechanical EngineeringTianjin University of TechnologyTianjin300384China

Pathologic fracture is caused by bone diseases,which is common in middle-aged and elderly *** bone strength is the leading contributor to this type of ***,accurately quantifying bone strength could help clinicians assess individualized fracture risk and develop therapeutic *** clinical imaging including dual X-ray absorptiometry(DXA),computed tomography(CT),and magnetic resonance imaging(MRI)has been an important tool to obtain radiology images of bone,which could be further used for noninvasive assessment of bone strength and related fracture *** the development of biomechanics and computer technology,the combination of finite element analysis with orthopedic imaging is the most advanced method for noninvasive prediction of bone strength in *** this review,an overview is provided for the commonly noninvasive methods based on the radiology images(i.e.,DXA,CT,and MRI)to predict bone strength,which may improve the understanding of the relationship between orthopedic clinical imaging and biomechanics.

关键词： Orthopedic clinical imaging Biomechanics Bone strength Finite element analysis

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The friction characteristics and velocity distribution of pulsatile flows in a rod bundle 27

The friction characteristics and velocity distribution of pu...

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27th International Conference on Nuclear Engineering: Nuclear Power Saves the World!, ICONE 2019

作者： Li, Xing Qi, Peiyao Tan, Sichao Mi, Zhengpeng Li, Dongyang Fundamental Science on Nuclear Safety and Simulation Technology Laboratory Harbin Engineering University Harbin Heilongjiang China Science and Technology on Reactor System Design Technology Laboratory Nuclear Power Institute of China Chengdu China

ISBN: (纸本)9784888983051

The transient fluctuation of flow rate in a nuclear reactor is a common phenomenon in floating reactors and possible accident scenarios, the response for transient flow determined the damage threshold of fuel assemblies. Friction characteristics and velocity distribution of low-frequency pulsatile flows in a rod bundle have been studied. The experiments were conducted under the time-averaged Reynolds number 1000 Copyright © 2018-2019 by JSME

关键词： Pressure drop

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Necklace-Like Te-Au Reticula Platform with Three Dimensional Hotspots for Surface-Enhanced Raman Scattering (Sers) Sensor for Food Hazards Analysis

SSRN

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SSRN 2023年

作者： Li, Pan Li, Jingya Li, Man Wang, Qianqian Wang, Juan Zhu, Yinbo Bu, Linfeng Zhang, Hanyuan Xu, Weiping Department of Pathology Anhui University of Chinese Medicine Hefei230012 China University of Science and Technology of China Hefei230026 China Department of Bioengineering The First Affiliated Hospital of USTC Division of Life Sciences and Medicine University of Science and Technology of China Anhui Hefei230001 China Department of Pharmacy Anhui University of Chinese Medicine Anhui Hefei230038 China CAS Key Laboratory of Mechanical Behavior and Design of Materials Department of Modern Mechanics CAS Center for Excellence in Complex System Mechanics University of Science and Technology of China Hefei230027 China Center of Medical Physics and Technology Hefei Institutes of Physical Science CAS Hefei230021 China Anhui Provincial Key Laboratory of Tumor Immunotherapy and Nutrition Therapy Anhui Provincial Hospital Anhui Hefei230001 China Gerontology Institute of Anhui Province Hefei230001 China University of Science and Technology of China China

In this work, we combined three-dimensional (3D) necklace-like Te-Au reticula as novel surface-enhanced Raman scattering (SERS) active substrates with oxidation-reduction displacement reactions to construct a molecular machine for SERS detection. The structurally tunable 3D necklace-like spatial structures generated more active ‘hot spots’ and thus enhanced the sensitivity of SERS signals. Besides, layers of ultrathin nanowires showed high sequence dependence which ensure the repeatability and abundant hotspots at interparticle gaps guarantee the high SERS performance of the substrate. A better localized surface plasmon resonance (LSPR) effect of the sensor was verified by finite-difference time-domain (FDTD) analysis in both Raman intensities and electromagnetic field distributions compared to the citrate-stabilized AuNPs and CTAB-protected AuNRs. The proposed strategy can also serve as a universally amplified and sensitive detection platform for monitoring different molecules, thus achieving an amplification detection of 3,3'-diethylthiatricarbocyanine iodide (DTTCI) are 1 nM and R6G with a low limit of detection of 1 pM. Especially, The intensity of the main vibration of R6G from 30 spots of SERS data with excellent reproducibility (relative standard deviation of 6.25%). High selectivity and accuracy of the SERS sensor were proved by practical analysis melamine (MM) in milk with a linear calibration curve (R2=0.9962) and a limit of detection of 0.75 mg/kg. Our research provides a new perspective to construct 3D SERS sensor from integrated structural design. © 2023, The Authors. All rights reserved.

关键词： Substitution reactions

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Delamination of an Elastic Cuboid from a Flat Rigid Substrate

SSRN

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SSRN 2023年

作者： Chen, ZiJian Sun, XiaoHao Zhu, YinBo He, ZeZhou Zhao, Yang Wang, Zhengzhi Wu, HengAn Wu, XiaoPing Gu, Ping CAS Key Laboratory of Mechanical Behavior and Design of Materials Department of Modern Mechanics CAS Center for Excellence in Complex System Mechanics University of Science and Technology of China Hefei230027 China Department of Mechanical Engineering University of Colorado Boulder BoulderCO80309 United States Department of Precision Machinery & Precision Instrumentation University of Science and Technology of China Hefei230026 China Department of Engineering Mechanics School of Civil Engineering Wuhan University Hubei Wuhan430072 China

Due to their strong pull-off force on noncooperative objects, dry adhesive materials have promising applications in gecko-mimicking robots and mechanical grippers. Previous experimental studies have shown that uniform interfacial stress and center delamination are favorable for achieving a high pull-off force;however, an in-depth understanding of interfacial stress distribution, delamination mode, and pull-off force of square cross-section elastomers is lacking. The square cross-section is expected to improve the packing ratio and pull-off force further. This paper studies a model system where an elastic square cuboid is detached from a flat rigid substrate to provide theoretical support for the design of adhesive materials. Based on elastomers' energy release rate and instability, we establish a three-dimensional model for the elastic square cuboid and analyze the mechanism of three delamination modes: edge delamination, center delamination, and cavity delamination. Furthermore, a new theoretical model for the pull-off force and phase diagram of the various delamination modes is developed. We found three subdivision crack patterns in the cuboid edge delamination mode, arc-shaped, fingering, and rhombus, which are different from the cylinder sample. Fingering cracks of cylinder samples are usually considered characteristics of elastic instability, but those of cuboid samples cannot be defined as elastic instability. The three edge crack patterns are gradually transformed, determined by the interfacial stress distribution, which is affected by the sample width-to-thickness ratio. The following results are obtained by combining the experimental and theoretical pull-off forces and phase diagram data. First, the interfacial stress distribution determines the pull-off force, and the delamination mode is an index to judge the stress distribution. Second, we propose a novel dry adhesive design strategy that regulates interfacial delamination to achieve controllable pull-of

关键词： Adhesion

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Modification of severe accident analysis code for accident tolerant fuel (ATF) applications 27

Modification of severe accident analysis code for accident t...

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27th International Conference on Nuclear Engineering: Nuclear Power Saves the World!, ICONE 2019

作者： Xu, Tao Ma, Haifu Tian, Chao Wu, Yirui Yang, Junyun Wang, Kai Zhang, Bin Wang, Junlong Deng, Yaxin Science and Technology on Reactor System Design Technology Laboratory Nuclear Power Institute of China Chengdu Sichuan China School of Nuclear Science and Technology Xi'an Jiaotong University Xi'an Shaanxi China

ISBN: (纸本)9784888983051

After the Fukushima nuclear accident, we gradually realized the safety issues of the traditional UO2+Zr nuclear fuel system. Accident tolerance fuel (ATF) is a new generation fuel concept proposed to improve the performance of fuel elements against severe accidents, and can withstand the consequences of accidents for a long time while maintaining or improving their performance under normal operating conditions. Nowadays, the issue of the safe utilization of nuclear energy has attracted more and more attention. reactor severe accident simulation and analysis for ATF has also become one of the important research directions. MELCOR is a fully integrated engineering-grade computer code which can model severe accidents phenomena in light water reactors. However, the existing MELCOR code is only applicable for the UO2+Zr fuel system, and cannot simulate the behavior of the ATF. So it is necessary to modify the MELCOR code for ATF applications. Based on extensive investigation, multi-fuel and multi-cladding processing module and new physical properties of ATF are added to MELCOR. Also the heat transfer model, oxidation model and cladding failure model are modified, enabling the MELCOR code to calculate ATF behaviors. Afterwards, the model verification is carried out. Then the traditional UO2+Zr and five ATF combinations are applied to the traditional three-loop PWR nuclear power plant to perform the safety analysis under large break loss of coolant accident (LBLOCA). The calculation results show that ATFs have better accident tolerance ability than UO2+Zr fuel system used in the commercial PWR, and the temperature of the cladding rises more slowly. The cladding failure is also delayed to different extent. The ATF fuel system has a better performance under the severe accident condition. © 2018-2019 by JSME

关键词： Uranium dioxide

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reactor temperature control system based on multi-model predictive control 27

Reactor temperature control system based on multi-model pred...

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27th International Conference on Nuclear Engineering: Nuclear Power Saves the World!, ICONE 2019

作者： Yun, Yu Jian, Sun Liu, Hongchun Pan, Zhu Zhou, Jixiang Qi, Ye Science and Technology on Reactor Design Technology Laboratory Nuclear Power Institute of China Chengdu Sichuan China

ISBN: (纸本)9784888983051

reactor coolant temperature control plays a central role among all reactor control systems because the effect of temperature control is directly related to the load tracking capability and also to the reactor protection margins, such as the over-temperature and over-power restraints. Special for the Mode-A reactor, the capacity of reactor is depending on the accurate and quality of temperature control. For example, in most of the time, all the Mode-A reactors in China are operating at basic load, so the temperature control is always worked in an simple way. But the temperature control system must also consider the quicker response and capacity to the wide range change of load, this paper based on point-kinetic model and heat transfer model in reactor, designs a suitable temperature model for control system. Considering that the traditional PID control method is difficult to solve the robustness and stability of high-order systems for large range operation, this paper uses Multi-model Predictive Control to solve this problem. According to the mechanism model, and establish nine single models, this paper online calculation model -matching degree to get recursive bayesian probability weighting, then get global prediction model. According to the global model, design Multi-model predictive control strategy. The simulation results indicate that under large conditions change, also robust and stable control performance is obtained. Copyright © 2018-2019 by JSME

关键词： Model predictive control

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A Novel Torsion Instrument for Miniaturized Components Based on the Flexural Pivot

SSRN

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SSRN 2022年

作者： Liu, Dabiao Hu, Jianhui Liu, Hao Hu, Jiongjiong Luo, Tong Zhang, Zhiya Lei, Jian Hu, Peng Chen, Yanming He, Yuming School of Aerospace Engineering Huazhong University of Science and Technology Wuhan430074 China Hubei Key Laboratory of Engineering Structural Analysis and Safety Assessment Wuhan430074 China System Design Institute of Hubei Aerospace Technology Academy Wuhan430040 China Hubei Standardization and Quality Institution Wuhan430060 China

Torque measurement plays a significant role in characterizing microelectromechanical systems with rotation components and torsional behaviours of slender structures. A high-sensitivity torque transducer based on the flexural pivot with a wide measurement range is addressed. The torque transducer consists of a cylindrical flexural pivot acting as the elastic element, and an optical angle measurement system including dual laser displacement sensors. The instrument can measure the torque accurately using the flexural pivot with a known torsional spring constant. By selecting suitable pivots, it allows for a vast torque capacity ranging from 1.94×10 -4 to 1.91×10 -2 Nm, corresponding to a resolution ranging from 1.94×10 -9 to 1.91×10 -7 Nm. Torsion tests on Nylon 6 filaments, PET ribbons, and copper wires were performed with the instrument. The practicality and applicability of the method are confirmed. The developed instrument is a helpful tool for characterizing the mechanical properties of miniaturized components. © 2022, The Authors. All rights reserved.

关键词： Torsional stress

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Modeling of SiC cladding bowing behavior with consideration of spacer grids

Modeling of SiC cladding bowing behavior with consideration ...

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2019 Transactions of the American Nuclear Society, ANS 2019

作者： Li, Wei Shirvan, Koroush Massachusetts Institute of Technology CambridgeMA02139 United States Science Technology on Reactor System Design Technology Laboratory Nuclear Power Institute of China Chengdu610213 China

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