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2017 IEEE 第3届信息技术与机电一体化工程国际学术会议(ITOEC 2017)

作者： Zhen Liu Qiang Wei Yan Cao State Key Laboratory of Mathematical Engineering and Advanced Computing China National Digital Switching System Engineering and Technological Research Center

Vulnerable code reuse in open source software is a serious threat to software ***,the existing highefficiency methods for vulnerable code clone detection have a large number of false-nega

ISBN: (纸本)9781509053643;9781509053636

Vulnerable code reuse in open source software is a serious threat to software ***,the existing highefficiency methods for vulnerable code clone detection have a large number of false-nega

关键词： Cloning Fingerprint recognition Feature extraction Linux Kernel Data structures

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An integrated strategy towards the facile synthesis of core-shell SiC-derived carbon@N-doped carbon for high-performance supercapacitors

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Journal of Energy Chemistry 2021年第5期30卷 512-521页

作者： Zhongya Pang Guangshi Li Xingli Zou Chenteng Sun Conghui Hu Wei Tang Li Ji Hsien-Yi Hsu Qian Xu Xionggang Lu State Key Laboratory of Advanced Special Steel&Shanghai Key Laboratory of Advanced Ferrometallurgy&School of Materials Science and Engineering Shanghai UniversityShanghai 200444China State Key Laboratory of ASIC and System School of MicroelectronicsFudan UniversityShanghai 200433China School of Energy and Environment&Department of Materials Science and Engineering City University of Hong KongKowloon Tong 999077Hong KongChina Shenzhen Research Institute of City University of Hong Kong Shenzhen 518057GuangdongChina

Porous active core-shell carbon material with excellent synergistic effect has been regarded as a prospective material for ***,we report an integrated method for the facile synthesis of carbide-derived carbon(CDC)encapsulated with porous N-doped carbon(CDC@NC)towards highperformance ***(PDA)as nitrogen and carbon sources was simply coated on SiC nanospheres to form SiC@PDA,which was then directly transformed into CDC@NC via a onestep molten salt electro-etching/in-situ doping *** synthesized CDC@NC with hierarchically porous structure has a high specific surface area of 1191 m^(2) g^(-1).The CDC core and NC shell are typical amorphous carbon and more ordered N-doped carbon,*** from its unique dual porous structures,the CDC@NC demonstrates high specific capacitances of 255 and 193 F g^(-1) at 0.5 and20 A g^(-1),*** reaction mechanism of the electro-etching/in-situ doping process has also been investigated through experimental characterizations and theoretical density functional theory *** is suggested that the molten salt electro-etching/in-situ doping strategy is promising for the synthesis of active core-shell porous carbon materials with synergistic properties for supercapacitors without the need for additional doping/activation processes.

关键词： Molten salt Electrochemical etching Core-shell structure Porous carbon In-situ nitrogen doping Supercapacitors

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Realizing mode conversion and optical diode effect by coupling photonic crystal waveguides with cavity

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Chinese Physics B 2015年第9期24卷 284-288页

作者：叶寒张金倩楠俞重远王东林陈智辉 State Key Laboratory of Information Photonics and Optical Communications Beijing University of Posts and Telecommunications Theoretical Condensed Matter Physics and Computational Materials Physics Laboratory School of PhysicsUniversity of Chinese Academy of Sciences Key Laboratory of Advanced Transducers and Intelligent Control System Ministry of Education and Shanxi ProvinceTaiyuan University of Technology

We propose a novel two-dimensional photonic crystal structure consisting of two line defect waveguides and a cavity to realize mode conversion based on the coupling effect. The W1/cavity/W2 structure breaks the spatial symmetry and successfully converts the even（odd） mode to the odd（even） mode in the W2 waveguide during the forward（backward）transmission. When considering the incidence of only the even mode, the optical diode effect emerges and achieves approximate 35 d B unidirectionality at the resonant frequency. Moreover, owing to the narrow bandpass feature and the flexibility of the tuning cavity, utilization of the proposed structure as a wavelength filter is demonstrated in a device with a Y-branch splitter. Here, we provide a heuristic design for a mode converter, optical diode, and wavelength filter derived from the coupling effect between a cavity and adjacent waveguides, and expect that the proposed structure can be applied as a building block in future all-optical integrated circuits.

关键词： mode conversion optical diode photonic crystal

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Enhanced High-Temperature Energy Storage Properties of BOPP Capacitor Films by Coating Heterostructural Ceramics Layers

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IET Nanodielectrics 2025年第1期8卷

作者： Xing, Zhaoliang Gong, Bize Yin, Tianyuan Guo, Shaowei Yang, Bo Zhang, Tiandong Hao, Jianhong State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources North China Electric Power University Beijing China State Key Laboratory of Advanced Power Transmission Technology China Electric Power Research Institute Beijing China Key Laboratory of Engineering Dielectrics and Its Application Ministry of Education Harbin University of Science and Technology Harbin China School of Electrical and Electronic Engineering Harbin University of Science and Technology Harbin China

Biaxially oriented polypropylene (BOPP), the dielectric material of choice for polymer film capacitors, is widely used in advanced electronic devices and power grids, among other applications. However, the nonlinear growth of the conduction loss at high temperatures leads to a rapid deterioration of its energy storage performance, which seriously hinders the development trend of miniaturisation and high integration of power systems. In this study, inorganic nanolayers with heterogeneous structure were grown on the surface of BOPP films by magnetron sputtering using high dielectric constant BaZrTiO3 and wide bandgap Al2O3 ceramic targets. Experimental and theoretical analyses show that the use of wide bandgap Al2O3 as the heterojunction outer layer can effectively impede carrier injection and transport, leading to a significant reduction in the leakage current density of the composite film, effectively enhancing the high temperature energy storage performance of the composite films. The synergistic enhancement of the inorganic heterojunction structure on the dielectric properties and insulating strength of the polymer film is attributed to the ability of the Al2O3/BaZrTiO3/BOPP/BaZrTiO3/Al2O3 (O-B-P-B-O) composite films to exhibit a discharge energy density of 2.49 J/cm3 and a charge/discharge efficiency of 77.6% at 125°C and 500 MV/m. © 2025 The Author(s). IET Nanodielectrics published by John Wiley & Sons Ltd on behalf of The Institution of Engineering and Technology.

关键词： Nanocomposite films

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Mechanical response joint under of the TiAl/steel brazed torsional load

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China Welding 2014年第3期23卷 42-47页

作者：李玉龙赵诚冯吉才何鹏 Key Lab for Robot & Welding Automation of Jiangxi Province Mechanical & Electrical Engineering School Nanchang University Nanchang 330031. State Key Laboratory of Advanced Welding and Joining Harbin Institute of Technology Harbin 150001.

An attempt to investigate the mechanical response to the torsional load, torsional tests of TiA1/steel brazed joints were conducted at room temperature. The TiAl/steel joints used in the torsional loading tests were brazed under the optimum parameters of 1 173 K and 300 s. Torsional strength, fracture path and the behavior of the reaction phases were studied. The results show that the average torsional strength of the joints with the diameters of 13mm, 16 mm and 20 mm is 136 N · m, 270 N · m and 490 N · m, respectively; which is 81.9% , 85.5% and 86. 2% of the TiAl base metal, respectively. Fracture path and crack propagation process analysis shows, when subjected to the torsional load, Ag-based solid solution is deformed and cracks germinate at the interface of Ag-based solid solutioa/AlCu2 Ti particles or Ag-based solid solution/AlCu2 Ti layers, grow up and propagate into the Al-Cu- Ti brittle reaction layers, then propagate into the TiAl base metal, subsequently result in failure.

关键词： TiAl brazing torsional test fracture path

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Geo-location for Ground Target with Multiple Observations Using Unmanned Aerial Vehicle

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Transactions of Nanjing University of Aeronautics and Astronautics 2018年第5期35卷 829-837页

作者： Xu Cheng He Chenglong Huang Daqing Key Laboratory of UAV’s Advanced Technology(Nanjing University of Aeronautics and Astronautics) Ministry of Industry and Information TechnologyNanjing 210016P.R.China State Key Laboratory of Satellite Navigation System and Equipment Technology Shijiazhuang 050081P.R.China

In order to improve the target location accuracy of unmanned aerial vehicle(UAV),a novel target location method using multiple observations is ***,the camera intrinsic parameters are ***,the weighted least squares estimation is used to improve the localization precision because the traditional crossover method is vulnerable to noise and has low *** repeatedly measuring the same target point,a nonlinear observation equation is established and then covered to linear equations using Taylor *** weighted matrix is obtained according to the height of the measurement point and the camera optic axis pointing angle,and then the weighted least squares estimation is used to calculate the target position ***,the effectiveness and robustness of this method is verified by numerical simulation and flight *** results show that this method can effectively improve the precision of target location.

关键词： unmanned aerial vehicle target location camera calibration weighted least squares estimation

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Low-overhead fault-tolerant error correction scheme based on quantum stabilizer codes

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Chinese Physics B 2022年第4期31卷 143-150页

作者： Xiu-Bo Chen Li-Yun Zhao Gang Xu Xing-Bo Pan Si-Yi Chen Zhen-Wen Cheng Yi-Xian Yang Information Security Center State Key Laboratory of Networking and Switching TechnologyBeijing University of Posts and TelecommunicationsBeijing 100876China School of Information Science and Technology North China University of TechnologyBeijing 100144China Advanced Cryptography and System Security Key Laboratory of Sichuan Province Chengdu 610025China

Fault-tolerant error-correction(FTEC)circuit is the foundation for achieving reliable quantum computation and remote ***,designing a fault-tolerant error correction scheme with a solid error-correction ability and low overhead remains a significant *** this paper,a low-overhead fault-tolerant error correction scheme is proposed for quantum communication ***,syndrome ancillas are prepared into Bell states to detect errors caused by channel *** propose a detection approach that reduces the propagation path of quantum gate fault and reduces the circuit depth by splitting the stabilizer generator into X-type and ***,a syndrome extraction circuit is equipped with two flag qubits to detect quantum gate faults,which may also introduce errors into the code block during the error detection ***,analytical results are provided to demonstrate the fault-tolerant performance of the proposed FTEC scheme with the lower overhead of the ancillary qubits and circuit depth.

关键词： fault-tolerant error correction quantum stabilizer code gate fault quantum circuit

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Study on the dynamic behavior of herringbone gear structure of marine propulsion system powered by double-cylinder turbines

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Science China(Technological Sciences) 2022年第3期65卷 611-630页

作者： XU JiangHai JIAO ChunXiao ZOU DongLin TA Na RAO ZhuShi State Key Laboratory of Mechanical System and Vibration Institute of VibrationShock and NoiseShanghai Jiao Tong UniversityShanghai 200240China Collaborative Innovation Center for Advanced Ship and Deep-Sea Exploration Shanghai 200240China

Propulsion systems powered by double-cylinder turbines(DCT)are widely used in large-scale ***,the nonlinear instability leads to hidden dangers associated with the safe operation,and there is a lack of theoretical and systematic research on this *** on the gear transmission principle and non-Newtonian thermal elastohydrodynamic lubrication(EHL)theory,a torsional model of a two-stage herringbone system forced by unsymmetrical load is *** nonlinear and time-varying factors of meshing friction,meshing stiffness,and gear pair backlash are included in the model,and multiple meshing states,including single-and double-sided impact are *** nonlinear phenomena of the dynamic system are explored and the effects of the unsymmetrical load on the system stability are *** results indicate that the stability of the gear system is improved,and that the back-sided impact gradually disappears with the increases of load ratio between the two inputs and the input load ***,it is found that the gear pairs on the low-load side experience more severe vibration than those on the high-load ***,the stability of the gear pairs decreases along the power transmission path of the multistage gear *** results of this research will be useful when making predictions of the stability of such systems and in the optimization of the load parameters.

关键词： DCT propulsion system DI-SO herringbone gears unsymmetrical load nonlinear instability mechanism

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Effect of rotationally accelerated shot peening on the microstructure and mechanical behavior of a metastableβtitanium alloy

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Journal of Materials Science & Technology 2021年第16期75卷 27-38页

作者： Xinkai Ma Zhuo Chen Dongling Zhong SNLuo Lei Xiao Wenjie Lu Shanglin Zhang Key Laboratory of Advanced Technologies of Materials(Ministry of Education) School of Materials Science and EngineeringSouthwest Jiaotong UniversityChengdu 610031China State Key Laboratory of Solidification Processing School of Materials Science and EngineeringNorthwestern Polytechnical UniversityXi'an 710072China National Key Laboratory of Reactor System Design Technology Nuclear Power Institute of ChinaChengdu 610041China

Microstructural evolution and deformation mechanism of a metastableβalloy(Ti-10 V-2 Fe-3 Al)processed by rotationally accelerated shot peening(RASP)were systematically investigated with optical microscopy,X-ray diffraction,electron backscatter diffraction and transmission electron *** gradient hierarchical microstructures(gradients inα″martensite andβphase,and hierarchical twins range from the nanoscale to microscale)can be fabricated by RASP via changing the shot peening *** hardening behavior and tensile mechanical properties of gradient hierarchical microstructure were systematically *** deformation twinning systems of{112}α″and{130}<310>α″in the kinkedα″martensite were revealed during the tensile *** was found that stress-induced martensitic transformation,twinnedα″martensite and the related dynamic grain refinement contribute to hardness and work hardening *** improvement of strength and ductility of the metastableα″titanium alloy can be achieved by introducing a gradient hierarchical microstructure.

关键词： Titanium alloys Gradient hierarchical microstructure α″martensite Rotationally accelerated shot peening Mechanical behavior

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Analyses of impedance matching for piezoelectric energy harvester with a resistive circuit

Analyses of impedance matching for piezoelectric energy harv...

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2011 International Conference on Electronic and Mechanical Engineering and Information Technology, EMEIT 2011

作者： Wang, Hongyan Shan, Xiaobiao Xie, Tao Fang, Muwen State Key of Advanced Robot and System Harbin Institute of Technology Harbin China College of Computer and Control Engineering Qiqihar University Qiqihar China

ISBN: (纸本)9781612840857

To investigate resistance matching and the power optimality performance of the piezoelectric energy harvester connected to a resistance circuit, an analytical solution for the bimorph piezoelectric energy harvester based on the piezoelectric constitutive equations and the fundamental mechanics of materials relations is done to estimate the maximum achievable power and the optimal resistance. A finite element model for system-level simulation is constructed to analyze the effect of the various load resistance on output power around the resonance frequency. Furthermore, the internal impedance of the energy harvester is obtained from a harmonic alternating voltage input using the finite element method (FEM). The simulation results were found to be in agreement with numerical calculation results. The results indicate that the output power depends on the internal impendence of the piezoelectric energy harvester, and the impedance matching can be used to extract maximum output power. © 2011 IEEE.

关键词： Energy harvesting

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