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comparison of multi-sensor fusion methods for maritime target object tracking

Journal of Institute of control, robotics and Systems 2019年第6期25卷 551-556页

作者： Han, Jungwook Cho, Yonghoon Kim, Jinwhan Lee, Philyeob Department of Mechanical Engineering Korea Advanced Institute of Science and Technology Korea Republic of Naval R&D Center Hanwha Systems Co. Ltd.

Automatic target tracking of surrounding surface vessels is important to safely operate a maritime autonomous surface ship (MASS). To accurately and reliably estimate the target state in marine environments, designers have fused various navigation sensors, including radar, lidar, and cameras. This study compares how well several sensor fusion methods perform for target motion analysis (TMA) tracking. Although the ideal approach is to combine all of the sensor outputs into a single integrated fusion-based tracking filter, this approach is not always preferred in practice due to difficulties in tuning filter parameters, challenges of data association between different sensors, and a large computational effort that cannot be easily distributed. In this paper, we focus on track fusion approaches that combine tracking results from a local tracking filter using individual sensor observations. We compare the sensor fusion methods using a Monte-Carlo simulation and discuss the results. © ICrOS 2019.

关键词： Target tracking

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Adaptive Eco-driving of Fuel Cell Vehicles Based on Multi-light Trained deep reinforcement Learning

Adaptive Eco-driving of Fuel Cell Vehicles Based on Multi-li...

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IEEE conference on Vehicle Power and Propulsion (VPPC)

作者： Bo Liu Chao Sun Qiang ren Xiaodong Wei Qingyun Min Biao Liang School of Mechanical Engineering Beijing Institute of Technology Beijing China GAC R&D Center Guangzhou Automobile Group Co. Ltd Guangzhou China College of Mechanical and Vehicle Engineering Hunan University Changsha China

ISBN: (纸本)9781665405294

With the advent of modern communication technology, future driving environment information such as the coming traffic lights can help vehicles make more intelligent planning and decision-making. This study proposed an adaptive eco-driving method of Fuel Cell Vehicles (FCVs) based on multi-light trained deep reinforcement Learning (drL), aiming to improve the fuel economy and comfort of FCVs. By setting a reasonable reward function, the drL agent takes actions to maximize the cumulative reward according to the environmental information received. An application method was further studied to fulfill the eco-driving of vehicles in complex arterial road scenarios. The result shows that the proposed method can adapt to variable scenarios with traffic lights, and quickly solve the approximate optimal speed trajectory. Hydrogen consumption of multi-light trained drL models is reduced by more than 10% on average compared with that of the single-light trained drL model.

关键词： Training Adaptation models Biological system modeling Hydrogen reinforcement learning computer architecture Fuel economy

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Outstanding reviewers for rSC Advances in 2023

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rSC AdVANCES 2024年第29期14卷 20797-20798页

作者： [Anonymous] University of Concepción Chile Fudan University China Northwestern University United States University of Perugia Italy National Energy Technology Laboratory United States University of Delaware United States Southeast University China University of Aveiro Portugal Graphic Era Deemed to be University India University of Novi Sad Serbia Michigan Technological University United States University of Nottingham United Kingdom University of Cadiz Spain Université de Kinshasa Democratic Republic Congo Takeda Pharmaceutical Co Ltd Japan Stanford University United States China University of Petroleum East China University of California San Diego United States Shantou University Medical College China Shenzhen University First Affiliated Hospital China Nanjing Tech University China Rice University United States National University of Cordoba Argentina University of Freiburg Germany Bristol-Myers Squibb Co R&D Lawrenceville United States University of Hertfordshire-Egypt Campus Egypt Scientist-II Abzena LLC United States Politechnika Warszawska Wydzial Chemiczny Poland RV College of Engineering India Toho University Japan University of Sydney Australia Guizhou University China Zhejiang University China Tesla Motors Inc United States University of Tubingen Germany Lublin University of Technology Poland University of Belgrade Institute for Multidisciplinary Research Serbia InnoRenew CoE Slovenia SiOxMed LLC United States University of Michigan United States The University of Alabama United States Auburn University United States University of Guanajuato Mexico Tokyo Institute of Technology Japan

We would like to take this opportunity to thank all of rSC Advances' reviewers for helping to preserve quality and integrity in chemical science literature. We would also like to highlight the Outstanding reviewer...

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Advancements in Two-dimensional Scanning Sterilization Utilizing High repetition rate Laser-Induced Quasi-continuous Plasmas

SSRN

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SSrN 2024年

作者： Chen, Fei Wang, Shuqing Zhang, Wanfei Guo, Yong Zhang, Yan Liang, Jiahui Zhang, Lei Yin, Wangbao Xiao, Liantuan Jia, Suotang State Key Laboratory of Quatum Optics and Optics Devices Institute ofLaser Spectroscopy Shanxi University Taiyuan030004 China Collaborative Innovation Center of Extreme Optics Shanxi University Taiyuan030004 China National Energy R＆D Center of Petroleum Refining Technology RIPP SINOPEC Beijing100083 China Shanxi Xinhua Chemical Defense Equipment Research Institute Co. Ltd Taiyuan030041 China School of Optoelectronic Engineering Xi’an Technological University Xi’an710021 China

In the realm of biological experimental research, bacterial deposition on scientific instruments' surfaces can compromise the integrity of experimental outcomes. Prolonged bacterial accumulation may even result in diminished instrument functionality, rendering them incapable of normal operation. Traditional chemical cleaning methods carry the risk of secondary contamination and are unsuitable for decontaminating precision optical or electronic instruments. Therefore, it is imperative to develop novel non-contact, waterless, contamination-free, and non-destructive decontamination methods. This paper introduces an innovative two-dimensional high-speed scanning sterilization technique based on high repetition rate laser-induced quasi-continuous plasmas. The experiment targeted Escherichia coli and Bacillus subtilis for decontamination, investigating the impact of laser energy, repetition rate, scanning rate, repetition scanning times, and focal distance on the inactivation rate. The results indicate that at a laser repetition rate of 15 kHz, an energy of 680 μJ/pulse, a repetition scanning of 10 times, and a focal distance of -50 mm, the decontamination efficiency reaches 26.7 mm²/min, with an inactivation rate exceeding 98%, achieving rapid and efficient decontamination of bacteria adhering to the carrier. Furthermore, the paper explores the decontamination mechanism of laser-induced plasma, demonstrating that the primary mechanism of bacterial inactivation using this technique is the action of the plasma rather than the thermal ablation effect of laser irradiation. The proposed laser-based bacterial decontamination device is characterized by its compact design, integrability, ease of operation, and high sterilization effectiveness. This makes it a promising solution with broad applications in the fields of biological science, precision optoelectronics, medical devices, food processing, and more. Moreover, it integrates with LIBS technology to achieve the integrated d

关键词： Sterilization (cleaning)

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A Novel Non-contact Carrying and Transportation Method Based on Near-Field Acoustic Levitation and Negative Pressure Adsorption

SSRN

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SSrN 2022年

作者： Li, Yuanbo Li, He Shen, Yi Bulading, Aimaiti Zeng, Qingliang College of Mechanical and electronic engineering Shandong University of Science and Technology Qingdao266590 China KUKA China No. 3 Liaoxin Road Shunde District Foshan528311 China R&D Center INESA（Group）Co. Ltd. No.39 Hongcao Road Xuhui District Shanghai200233 China

A novel non-contact carrying and transportation technology is proposed based on near-field acoustic levitation (NFAL) and negative pressure adsorption effect. The disk-shaped objects can be levitated at a height of tens or even hundreds of micrometers, and a restoring force will be generated during the transportation process to make the object move toward the center of the acoustic emission plate, once the suspended object deviates from the center of the acoustic emission plate. A compact object stage is designed, and the coupling mechanism of near-field ultrasonic suspension force and hydrostatic vacuum adsorption force is revealed. The modal and harmonic response analysis of the acoustic emission unit of the object stage are carried out by using the finite element method to find the optimal operating parameters, and the impedance matching of the acoustic emission unit is carried out to improve the energy conversion efficiency. A prototype of the object stage is fabricated and assembled to verify the working performance. Ultimately, the experimental test environment is built to investigate the characteristics of the non-contact carrying and transportation system. The experimental results show that the acoustic emission unit produces the "N"-shaped ideal mode at the resonant frequency of 20190Hz with the maximum vibration amplitude of 14.6um. The maximum bearing weight of the object stage is 470g. The restoring force of the non-contact transportation system can reach 2.03mN, which is 120.65% higher than the near-field acoustic levitation. In the equal time, the restoring distance of objects moving with different accelerations after eccentricity increases significantly, which contributes to improve the speed and efficiency of non-contact transportation system. The study on the non-contact carrying and transportation technology proposed in this article will provide a novel method for the transportation of precision components such as optical lenses, silicon wafers, et

关键词： Finite element method

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retraction Note: Improved electromagnetic compatibility testing for rail vehicles using a quantum-based 3d reconstruction algorithm

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Optical and Quantum Electronics 2024年第11期56卷 1-1页

作者： Zhao, Ta Liu, Xueming Sun, Ping Wang, Lin Wan, Yingli Liu, Weiping Technology-Oriented R&D Department of National Engineering Research Center for Railway Vehicle CRRC Changchun Railway Vehicle Co. Ltd Changchun China College of Instrumentation and Electrical Engineering Jilin University Changchun China

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development of miniaturized SAF-LIBS with high repetition rate acousto-optic gating for quantitative analysis

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等离子体科学和技术（英文版） 2023年第1期25卷 157-164页

作者： Fei CHEN Jiajia HOU Gang WANG Yang ZHAO Jiaxuan Li Shuqing WANG Lei ZHANG Wanfei ZHANG Xiaofei MA Zhenrong LIU Xuebin LUO Wangbao YIN Suotang JIA State Key Laboratory of Quantum Optics and Quantum Optics Devices Institute of Laser SpectroscopyShanxi UniversityTaiyuan 030006People's Republic of China Collaborative Innovation Center of Extreme Optics Shanxi UniversityTaiyuan 030006People's Republic of China School of Physics and Optoelectronic Engineering Xidian UniversityXi'an 710071People's Republic of China Shanxi Xinhua Chemical Defense Equipment Research Institute Co. Ltd.Taiyuan 030006People's Republic of China School of Science North University of ChinaTaiyuan 030051People's Republic of China National Energy R&D Center of Petroleum Refining Technology(RIPP SINOPEC)Beijing 100083People's Republic of China

The self-absorption effect in laser-induced breakdown spectroscopy(LIBS)reduces the accuracy of quantitative measurement *** self-absorption-free LIBS(SAF-LIBS)has been proved to directly capture the optically thin plasma spectra by setting an appropriate exposure *** this work,a novel SAF-LIBS technique with high repetition rate acousto-optic gating is developed,in which an acousto-optic modulator is used as the shutter to diffract the optically thin fluorescence,and a high repetition rate laser is used to produce quasi-continuous plasmas to enhance the integral spectral intensity,so that the CCd spectrometer can replace an intensified CCd(ICCd)and echelle spectrometer in *** results show that the average absolute prediction error of aluminum is reduced to 0.18％,which is equivalent to that of traditional *** technique not only effectively shields continuous background radiation and broadened spectral lines in optically thick plasma,but also has advantages of miniaturization,low cost,convenience and reliability.

关键词： self-absorption-free LIBS (SAF-LIBS) self-absorption effect optically thin plasma high repetition rate laser acousto-optic gating

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Fabrication and Characterization of Biomineral-Amphiphilic copolymer Hybrid Microparticle: Evaluation of Storage Stability and collagen Synthesis Property of Curcumin

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SSrN 2024年

作者： Hwang, Ee Taek Yoon, Yeahwa Kim, Ka ram Jeong, Jinhee Kim, Jung Soo Lee, Chan Hee Lee, Hye Sun Jeon, Byoung Seung Lee, Jae Won Department of Food Biotechnology Dong-A University Busan49315 Korea Republic of Department of Cosmetics Engineering Konkuk University Seoul05029 Korea Republic of GeneCellPharm Corporation Seoul05836 Korea Republic of Symbiose Cosmetics Gyeonggi-do Seongnam-si13555 Korea Republic of R&D Center ACT Co. Ltd. Gyeonggi-do Suwon16506 Korea Republic of Center for Convergence Bioceramic Materials Korea Institute of Ceramic Engineering & Technology Chungcheongbuk-do Cheongju-si28160 Korea Republic of Korea Conformity Laboratories Incheon21999 Korea Republic of

Microencapsulation technology is an available and effective therapeutic option for targeted bioactive components. This study details the application of the biomineralization-mediated separation and encapsulation of food-derived bioactive materials entrapped in organic materials for storage stability and effectiveness evaluations in promoting skin wound healing. The hybrid materials were assembled using Caco3 mineralized with an amphiphilic copolymer coupled with curcumin (CUr) to form fine-textured and mechanically stable hexagonal particles. The synthesized products were characterized by field-emission scanning electron microscopy, energy-dispersive X-ray spectroscopy, Fourier transform infrared spectroscopy, X-ray diffraction, thermogravimetric analysis, and particle size analysis. The obtained CUr entrapped in hybrid microparticles possessed 1.58 wt % and retained 91% of their initial concentration after four different temperature storage conditions. In detail, the crystallization mechanism suggested that CUr with an amphiphilic copolymer could be the core part that provides the surface for Caco3 crystal growth, independently forming organic–inorganic structures and preventing CUr leaching. Furthermore, the induced hybrid particles promote skin wound healing by stimulating collagen synthesis without causing cytotoxicity. To the best of our knowledge, this is the first study showing the potential use of bioactive ingredients with an amphiphilic copolymer combined with biomineralization applied to formulation technology and skin wound healing effect. © 2024, The Authors. All rights reserved.

关键词： Calcium carbonate

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Optimal selection and effect evaluation of re-fracturing intervals in shale gas horizontal wells

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Natural Gas Industry B 2019年第1期6卷 79-85页

作者： Li, Yanchao He, Yunbin Xiao, Jianfeng Shi, Xiaozhi Feng, Qiang Yin, congbin Downhole Service Company CNPC Chuanqing Drilling Engineering Co. Ltd. Chengdu 610052 Sichuan China National Energy Shale Gas R&D (Experiment) Center Chengdu 610052 Sichuan China CNPC Oilfield Technology Service Company Beijing 100007 China Shale Gas E&D Project Department CNPC Chuanqing Drilling Engineering Co. Ltd. Chengdu 610052 Sichuan China

The monitoring results of production logging show that almost one third of perforation clusters produce no or less gas after volumetric fracturing is initially applied in shale gas reservoirs. Besides, the production decline after the commissioning is commonly faster. In this paper, a fracture network prediction model and a fracturing well productivity prediction model were established based on microseismic interpretation data and hydraulic fracture network propagation results. After petrophysics, microseism, production performance were taken into consideration comprehensively, shale re-fracturing development potential evaluation index (rdPEI) was proposed. Then, a re-fracturing design and evaluation method was developed and targeted interval selection and evaluation was realized and applied on site. And the following research results were obtained. First, due to the heterogeneity of natural fractures, hydraulic fracture networks are more different, so an obvious “dead gas zone” can be easily formed and its re-fracturing potential is high. Second, the initial hydraulic fracture network is more affected by natural fractures. The main part of a fracture network propagates along the direction of maximum horizontal major stress, the fractures in regional stimulated intervals propagate in the form of double wing, and the length of a liquid swept fracture network is 52–70% of seismic interpretation result. Third, the rdPEI model avoids the limitations of single factor analysis and realizes the quantitative prediction on three types of indexes of recoverability, compressibility and re-fracturing. Fourth, re-fracturing of the case well is remarkable in stimulation effect. Its shale gas productivity is increased by 38.9%, and its cumulative gas production in one year is increased by 62.5%. In conclusion, re-fracturing is an effective and feasible method for improving the single well ultimate recovery reserves of shale gas. This method provides a theoretical and technical sup

关键词： Fracture network propagation Microseismic Prediction Production decline Productivity re-fracturing Shale gas Single-well ultimate recoverable reserves

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design of Passive Gravity Balance Mechanism for Wearable Exoskeleton Suit

Design of Passive Gravity Balance Mechanism for Wearable Exo...

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作者： Qu, Chenxi Yin, Peng Zhao, Xiaohua Yang, Liang College of Automotive Engineering Jilin University Changchun130025 China School of Mechanical and Automotive Engineering South China University of Technology Guangzhou510640 China Intelligent Technology R&D Center Guangzhou Hyetone Mechanical and Electrical Equipment Co. Ltd. GuangzhouGuangdong510640 China

The wearable exoskeleton suit is a man-machine system which can combine the human limbs with machinery and environment. The key point of wearable exoskeleton suit is the design of passive gravity balance mechanism to achieve passive gravity balance in the system. Based on the principle of passive gravity balance technology, this paper deduces the theoretical equation of passive gravity balance. Then, the equations were applied to the passive gravity balance for single parallelogram mechanism and double parallelogram mechanism. Simultaneously, the analysis was also conducted using MATLAB optimization tool. The results show that the parallelogram passive gravity balance mechanism can achieve any position to hover within a certain range of spring tension. It can make the operating force at low level when doing the up and down movement. consequently, with the help of this system, the vibration damage in some work conditions to human musculoskeletal can be significantly reduced, it can be introduced to many work conditions, such as pneumatic impact drilling. © Springer Nature Singapore Pte ltd. 2020.

关键词： Mechanisms

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