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International Conference on Machine Tool technology and Mechatronics engineering, ICMTTME 2014

作者： Sun, Tao Li, Fang Zhou, Xiao-Qing Ma, Fei Jiangsu Key Laboratory of Large Engineering Equipment Detection and Control Xuzhou Institute of Technology XuzhouJiangsu China

ISBN: (纸本)9783038352464

Heat pipe has excellent conductivity of heat and diversity of structure, so it can be used in machining which can decrease or avoid using the cutting fluid. In this paper, the abrasive tool with rotating heat pipe was designed. To validate that the abrasive tool with heat pipe can safely and steadily grind materials, the structure of abrasive tool was finite element analyzed which included static analysis. Furthermore, the heat transfer performance of heat pipe was tested. The results indicated that heat pipe has certain cooling impacts relative to no heat pipe in machining. © 2014 Trans Tech Publications, Switzerland.

关键词： Heat pipes

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A Small-Signal Modeling Method for Bidirectional CLLC Resonant Converter 49

A Small-Signal Modeling Method for Bidirectional CLLC Resona...

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49th Annual Conference of the IEEE Industrial Electronics Society, IECON 2023

作者： Yuan, Jialing Wang, Nong Wang, Xuehua Wang, Feng Liu, Mingjie Huazhong University of Science and Technology State Key Laboratory of Advanced Electromegnetic Engineering and Technology Wuhan China Beijing Institute of Control Engineering Beijing China

ISBN: (纸本)9798350331820

The bidirectional capacitor-inductor-inductor-capacitor (CLLC) resonant converter featuring excellent soft-switching characteristic has been widely used in the fields of renewable energy sources, electric vehicles and energy storage systems. The fundamental harmonic approximation (FHA) has been proved an effective modeling method to CLLC resonant converter. However, the accuracy of model based on FHA is significantly reduced as the operating frequency moves from the resonant point. In this paper, a more accurate small-signal model is established and the reduced-order simplification is developed. Finally, the effectiveness and precision of the established model are verified by simulations. The simplified third-order model completely fits the simulation in low frequency range. © 2023 IEEE.

关键词： Renewable energy resources

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Revisited dynamic modeling and eigenvalue analysis of the cable-stayed beam

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Acta Mechanica Sinica 2020年第4期36卷 950-963页

作者： Lianhua Wang Xiaoyu Zhang Kai He Jian Peng College of Civil Engineering Hunan UniversityChangsha 410082China Key Laboratory for Wind and Bridge Engineering of Hunan Province Hunan UniversityChangsha 410082China Guangxi Communications Design Group Co. LtdNanning 530022China Hunan Provincial Key Laboratory of Structures for Wind Resistance and Vibration Control Hunan University of Science and TechnologyXiangtan 411201China

In this study,the Hamilton’s principle is applied to revisit the dynamic modeling of the cable-stayed beam,and the motion equations governing the nonlinear response of the cable-stayed beam are *** corresponding boundary terms are transformed to the dynamic equilibrium conditions through the continuity of the displacement at the anchoring *** the standard condensation procedure,the condensed model of the cable-stayed beam is *** eigenvalue analysis is performed to determine the closed-form eigenvalue solution of the linear problems,and two types of eigenvalue solution are *** is shown that the frequency spectrum of the cable-stayed beam exhibits the curve veering and crossover *** to these phenomena,the mode shapes of the cable-stayed beam may exhibit the coupling ***,the discrete model of the cable-stayed beam is determined,and the possible nonlinear interactions are discussed.

关键词： Cable-stayed beam Dynamic modeling Natural frequencies Mode shapes Curve veering

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Potential Transmission Choice for Internet of Things(IoT):Wireless and Batteryless Communications and Open Problems

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China Communications 2021年第2期18卷 241-249页

作者： Zhan Xu Guanjie Hu Minzheng Jia Lan Dong School of Information and Communication Engineering and with Key Laboratory of Modern Measurement&Control Technology Ministry of EducationBeijing Information Science&Technology UniversityChina Beijing Key Lab of Transportation Data Analysis and Mining School of Computer and Information TechnologyBeijing Jiaotong UniversityBeijingChina Department of Information Engineering Beijing Polytechnic CollegeBeijingChina

The 5th generation mobile communications aims at connecting everything and future Internet of Things(IoT)will get everything smartly *** realize it,there exist many *** key challenge is the battery problem for small devices,such as sensors or *** backscatter,also referred to as or battery-free backscatter,is a new potential technology to address this *** early and typical type of batteryless backscatter is ambient ***,batteryless backscatter utilizes environmental wireless signals to enable battery-free devices to communicate with each *** devices first harvest energy from ambient wireless signals and then backscatter these signals so as to transmit their own *** paper reviews the current studies about batteryless backscatter,including various backscatter schemes and theoretical works,and then introduces open problems for future research.

关键词： batteryless backscatter battery-free channel state information(CSI) channel estimation multiple antennas signal detection symbiotic communication

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Efficient Association Multiple-Object Tracker for marine Benthonic Organisms Counting 43

Efficient Association Multiple-Object Tracker for Marine Ben...

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43rd Chinese control Conference, CCC 2024

作者： Wang, Ning Kong, Xiangjun Dalian Maritime University School of Marine Engineering Dalian116026 China Dalian Key Laboratory of Green Power Control and Test for Intelligent Ships Dalian116026 China State Key Laboratory of Maritime Technology and Safety Dalian116026 China Dalian Maritime University School of Marine Electrical Engineering Dalian116026 China

ISBN: (纸本)9789887581581

The number of existing marine benthonic organisms fundamentally affects the aquaculture decisions of enterprises, yet faces significant challenges in automatic counting in dynamic occluded environments. In this paper, to tackle the above challenges, an efficient association multiple-object tracker for marine benthonic organisms counting (EAMBOC) is innovatively proposed by combining a Kalman filter incorporating global motion compensation (KGMC) and an efficient association mechanism (EAM). Specifically, KGMC is devised to alleviate the effect of nonlinear camera motion on trajectory prediction by correcting the Kalman filter via the affine matrix. EAM is further employed to associate the predicted trajectories with the detected objects based on the confidence scores so that valid information can be mined from low-quality detections to maintain the continuity of the trajectory. Finally, a comprehensive comparison with typical schemes using real-world videos demonstrates that EAMBOC outperforms DeepSORT, ByteTrack and UAVMOT schemes in terms of RMSE, MAPE and R 2 metrics. © 2024 Technical Committee on control Theory, Chinese Association of Automation.

关键词： Kalman filters

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New fast image edge-detection algorithm based on composite self-adaption predictor

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2013 3rd International Symposium on Chemical engineering and Material Properties, ISCEMP 2013

作者： Dang, Xiang Ying Xuzhou Institute of Technology Jiangsu Key Laboratory of Large Engineering Equipment Detection and Control Xuzhou 221000 China

ISBN: (纸本)9783037858363

Using advantages of gradient adjusted predictor (GAP) and gradient edge detection (GED) predictors of lossless image coding for reference, and the image was cut into four equal parts with the application of Graphics Processor Unit (GPU) parallel technology operation. In four sub-images, the composite self-adaption predictor was employed for predicting error image, threshold classification error image edge and thinning edge. Results showed that with the application of the parallel technology which avoided errors multiply, not only the complexity of the time was reduced significantly, but also the distinct, holistic and detail-rich edge image was obtained. © (2013) Trans Tech Publications, Switzerland.

关键词： Edge detection

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Four new polyhydroxylated steroids from the South Sea sponge Plakortis sp.

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Chinese Journal of Natural Medicines 2020年第11期18卷 844-849页

作者： WANG Kun-Ya LI Ping-Lin SUN Jing-Fan de Voogd Nicole J TANG Xu-Li LI Guo-Qiang Key Laboratory of Marine Drugs Chinese Ministry of EducationSchool of Medicine and PharmacyOcean University of ChinaQingdao 266003China Laboratory of Marine Drugs and Biological Products National Laboratory of Marine Science and TechnologyQingdao 266235China National Museum of Natural History PO Box 95172300 RA Leidenthe Netherlands Collge of Chemistry and Chemical Engineering Ocean Universiy of ChinaQingdao 266100China

Four new polyhydroxylated steroids plaksterols A–D(1–4), together with two known related steroids ergost-7,9(11),22-trien-3β,5α,6α-triol(5) and ergosta-6β-methoxy-7,22-diene-3β,5α-diol(6), were isolated from methanol extract of the South China Sea marine sponge Plakortis sp. Their structures were identified by spectroscopic analysis, including NMR, MS, and IR. The cytotoxicity of the polyhydroxylated steroids were evaluated, and compound 6 showed moderate inhibitory activities against K562, HL-60 and BEL-7402 cells.

关键词： Polyhydroxylated steroids Plakortis sp. Cytotoxic activity

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FISS GAN:A Generative Adversarial Network for Foggy Image Semantic Segmentation

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IEEE/CAA Journal of Automatica Sinica 2021年第8期8卷 1428-1439页

作者： Kunhua Liu Zihao Ye Hongyan Guo Dongpu Cao Long Chen Fei-Yue Wang School of Computer Science and Engineering Sun Yat-sen UniversityGuangzhou 510006China State Key Laboratory of Automotive Simulation and Control and the Department of Control Science and Engineering Jilin University(Campus Nanling)Changchun 130025China Mechanical and Mechatronics Engineering Department at the University of Waterloo 200 University Avenue West WaterlooON N2L 3G1Canada State Key Laboratory of Management and Control for Complex Systems Institute of AutomationChinese Academy of SciencesBeijing 100190 Institute of Systems Engineering Macao University of Science and TechnologyMacao 999078China

Because pixel values of foggy images are irregularly higher than those of images captured in normal weather(clear images),it is difficult to extract and express their *** method has previously been developed to directly explore the relationship between foggy images and semantic segmentation *** investigated this relationship and propose a generative adversarial network(GAN)for foggy image semantic segmentation(FISS GAN),which contains two parts:an edge GAN and a semantic segmentation *** edge GAN is designed to generate edge information from foggy images to provide auxiliary information to the semantic segmentation *** semantic segmentation GAN is designed to extract and express the texture of foggy images and generate semantic segmentation *** on foggy cityscapes datasets and foggy driving datasets indicated that FISS GAN achieved state-of-the-art performance.

关键词： Edge GAN foggy images foggy image semantic segmentation GAN semantic segmentation

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Study on laser-encoding scheme to antagonize active jamming abstract

Study on laser-encoding scheme to antagonize active jamming ...

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2013 International Conference on Communication technology, ICCT 2013

作者： Jia, Qing-Zhong Liu, Yong-Shan Ding, Yan Key Laboratory of Dynamics and Control of Flight Vehicle School of Aerospace Engineering Beijing Institute of Technology Beijing China

ISBN: (纸本)9781845648633

To solve the laser active interfering problem in high repetition frequency, answering-deception and the laser synchronization retransmission, this paper proposes a laser-encoding scheme based on the analysis of counteractive jamming mechanism. This scheme overlays the random signal into the finite random encoding basis to enhance the concealment of laser detecting signal, to increase the decipher difficulty, and then to improve the anti-answering-deception-jamming ability of the system. In addition, a randomly changed phase is adopted to make the features of detecting signal waveform clearly different from the high repetition frequency jamming, and therefore to decrease the possibility the detecting signal confused by the high repetition frequency jamming. Moreover, a real-time gate and the first sequence matching recognition method are utilized in this scheme to eliminate the influence of the repeater jammer. As a result, a new laser-encoding method is proposed aiming at the antijamming of laser guidance ammunition, which is proved effectively in resistance high repetition frequency jamming, answering-deception, and synchronization retransmission jamming. © 2014 WIT Press.

关键词： Jamming

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Experimental studies on the pore structure and mechanical properties of anhydrite rock under freeze-thaw cycles

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Journal of Rock Mechanics and Geotechnical engineering 2022年第3期14卷 781-797页

作者： Chao Hou Xiaoguang Jin Jie He Hanlin Li School of Civil Engineering Chongqing UniversityChongqing400045China Key Laboratory of New Technology for Construction of Cities in Mountain Area of the Ministry of Education Chongqing UniversityChongqing400045China State Key Laboratory of Coal Mine Disaster Dynamics and Control Chongqing UniversityChongqing400045China

To study the deterioration mechanisms of anhydrite rock under the freeze-thaw weathering process,the physico-mechanical characteristics and microstructure evolutions of anhydrite samples were determined by a series of laboratory ***,a descriptive-behavioral model was used to measure the integrity loss in anhydrite samples caused by cyclic ***,the freeze-thaw damage mechanisms of anhydrite rock were revealed from the macro and micro *** results show that the pore size of the anhydrite rock is mainly concentrated in the range of 0.001-10μ*** the number of freeze-thaw cycles increases,there is a growth in the proportion of macropores and ***,the proportion of micropores shows a declining *** relations of the uniaxial compressive strength,triaxial compressive strength,cohesion,and elastic modulus versus freeze-thaw cycles can be fitted by a decreasing exponential function,while the internal friction angle is basically unchanged with freezethaw *** the increase of confining pressure,the disintegration rates of the compressive strength and the elastic modulus decrease,and the corresponding half-life values increase,which reveals that the increase of confining pressures could inhibit freeze-thaw damage to ***,it has been proven that the water chemical softening mechanism plays an essential role in the freeze-thaw damage to anhydrite ***,it is concluded that the freeze-thaw weathering process significantly influences the macroscopic and microscopic damages of anhydrite rock.

关键词： Anhydrite rock Freeze-thaw cycles Physico-mechanical characteristics Microstructure evolution Deterioration mechanisms

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