检索结果-内蒙古大学图书馆

SSRN 2022年

作者： Wang, Yanjie Nie, Xiaoyuan Song, Junhui Wang, Chao Yang, Fan Chi, Yaodan Yang, Xiaotian Shen, Ye Xu, Chunyan Centre for Advanced Optoelectronic Functional Materials Research Key Laboratory of UV-Emitting Materials and Technology Ministry of Education Northeast Normal University Changchun130024 China Key Laboratory for Comprehensive Energy Saving of Cold Regions Architecture of Ministry of EducationSchool of Electrical and Computer Jilin Jianzhu University Changchun130118 China Institute for Interdisciplinary Quantum Information Technology Jilin Engineering Normal University Jilin Engineering Laboratory for Quantum Information Technology Changchun130052 China

Using fist-principles calculations, we study the B atom of diffusion process and the origin of the perpendicular magnetic anisotropy in MgO|CoFe|Ta structures with boron. It is found that B atoms are more likely to enter the Ta layer than FeCo layer and MgO layer. This result is in good agreement with that of the experimental and theoretical results. Furthermore, we elucidate the physical origin of the interfacial PMA Ta|CoFe|MgO structure with B element. We find that interfacial PAM come from both the MgO|CoFe and CoFe|Ta layer interfaces. These findings provide a comprehensive understanding of the PMA and point towards the possibility to achieve the advanced-node STT-MRAM with high thermal stability. © 2022, The Authors. All rights reserved.

关键词： Magnesia

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3D Point Cloud Surface Reconstruction Based on Divide-and-Conquer Method in Laser Scanner 5

3D Point Cloud Surface Reconstruction Based on Divide-and-Co...

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2020 5th International Conference on Intelligent Computing and Signal Processing, ICSP 2020

作者： Lyu, Yuan-Zhi Guo, Min Sha, Ou Zhang, Hong-Yu Changchun Institute of Optics Fine Mechanics and Physics Chinese Academy of Science NO. 3888 South Nanhu Road Changchun Jilin Province China College of Computer Science and Engineering Changchun University of Technology NO. 2055 Yanan Street Changchun Jilin Province China

As to the problem of surface reconstruction in 3D laser scanner, we propose a divide-and-conquer based method, and realize the continuing growth of the reconstructed surface through comprehensive analysis of the correlations of scanning line point cloud data. First of all, filter the scanning line point cloud data, then confirm the relationship between the newly-insert point and the generated surface by using the local search algorithm based on adaptive point cloud segmentation, and finally, classify the newly-inserted points as sparse points, density points, growth points and flyback points by using the given maximum and minimum distance thresholds, and then the specific surface reconstruction is performed according to the point's classification. The experimental results show that the local search algorithm greatly reduces the calculation of the insert location of the point cloud compared with the global traversal search algorithm;the proposed method can process the flyback points, enhancing the repairability and the expandability of the reconstructed 3D surface compared with the traditional method. Furthermore, the quality of the reconstructed 3D surface, the generating speed and the occupation of storage space can all be controlled by adjusting the maximum and minimum distance thresholds according to actual demand. © 2019 Published under licence by IOP Publishing Ltd.

关键词： Scanning

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Xdn: towards efficient inference of residual neural networks on cambricon chips 2nd

Xdn: towards efficient inference of residual neural networks...

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2nd International Symposium on Benchmarking, Measuring, and Optimization, Bench 2019

作者： Li, Guangli Wang, Xueying Ma, Xiu Liu, Lei Feng, Xiaobing State Key Laboratory of Computer Architecture Institute of Computing Technology Chinese Academy of Sciences Beijing China School of Computer Science and Technology University of Chinese Academy of Sciences Beijing China College of Computer Science and Technology Jilin University Changchun China MOE Key Laboratory of Symbolic Computation and Knowledge Engineering Jilin University Changchun China

ISBN: (纸本)9783030495558

In this paper, we present XDN, an optimization and inference engine for accelerating residual neural networks on Cambricon chips. We leverage a channel pruning method to compress the weights of ResNet-50. By exploring the optimization opportunities in computational graphs, we propose a layer fusion strategy, which dramatically decreases the number of scalar computation layers, such as Batch Normalization, Scale. Furthermore, we design an efficient implementation of XDN, including data preprocessing, hyper-parameter auto-tuning, etc. The experimental results show that the ResNet-50 model can achieve significant speedup without accuracy loss by using our XDN engine. © Springer Nature Switzerland AG 2020.

关键词： Engines

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An Efficient PCA-Based Target Pose Estimation Algorithm for Low-Precision Point Clouds

An Efficient PCA-Based Target Pose Estimation Algorithm for ...

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IEEE Joint International Information Technology and Artificial Intelligence Conference (ITAIC)

作者： Zhizhou Jia Zhengchao Lai Yuetao Li Zhuo Yang Qun Rao Shaohui Zhang School of Optics and Photonics Beijing Institute of Technology Beijing China Beijing Key Laboratory for Precision Optoelectronic Measurement Instrument and Technology School of Optics and Photonics Beijing Institute of Technology Beijing China School of Computer Science and Technology Beijing Institute of Technology Beijing China School of Opto-Electronic Engineering Changchun University of Science and Technology Changchun Jilin China Laboratory of Science and Technology on Integrated Logistics Support National University of Defense Technology Changsha China

This paper introduces a grasping pose estimation algorithm tailored for two-fingered parallel grippers and consumer-grade depth cameras that can only capture low-precision point cloud information. Distinguishing itself from deep learning-based methods, this algorithm does not necessitate prior training on extensive datasets. Instead, it only requires acquiring a single frame of point cloud data from the target object's surface. After projection and subsequent two-dimensional PCA analysis, the algorithm adaptively generates grasping poses suitable for the current task, while considering the mechanical structure of the robotic arm. The experimental results demonstrate that the algorithm proposed in this paper achieves a high success rate in grasping common everyday objects. Furthermore, this algorithm can readily adapt to various combinations of robotic arm configurations and grippers.

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ERetinex: Event Camera Meets Retinex Theory for Low-Light Image Enhancement

arXiv

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arXiv 2025年

作者： Guo, Xuejian Tian, Zhiqiang Wang, Yuehang Li, Siqi Jiang, Yu Du, Shaoyi Gao, Yue the School of Software Engineering Xi’an Jiaotong University Xi’an710049 China the College of Computer Science and Technology Jilin University Changchun130012 China the National Key Laboratory of Human-Machine Hybrid Augmented Intelligence National Engineering Research Center for Visual Information and Applications Institute of Artificial Intelligence and Robotics Xi’an Jiaotong University Xi’an710049 China BNRist THUIBCS KLISS BLBCI School of Software Tsinghua University Beijing100084 China

Low-light image enhancement aims to restore the under-exposure image captured in dark scenarios. Under such scenarios, traditional frame-based cameras may fail to capture the structure and color information due to the exposure time limitation. Event cameras are bio-inspired vision sensors that respond to pixel-wise brightness changes asynchronously. Event cameras’ high dynamic range is pivotal for visual perception in extreme low-light scenarios, surpassing traditional cameras and enabling applications in challenging dark environments. In this paper, inspired by the success of the retinex theory for traditional frame-based low-light image restoration, we introduce the first methods that combine the retinex theory with event cameras and propose a novel retinex-based low-light image restoration framework named ERetinex. Among our contributions, the first is developing a new approach that leverages the high temporal resolution data from event cameras with traditional image information to estimate scene illumination accurately. This method outperforms traditional image-only techniques, especially in low-light environments, by providing more precise lighting information. Additionally, we propose an effective fusion strategy that combines the high dynamic range data from event cameras with the color information of traditional images to enhance image quality. Through this fusion, we can generate clearer and more detail-rich images, maintaining the integrity of visual information even under extreme lighting conditions. The experimental results indicate that our proposed method outperforms state-of-the-art (SOTA) methods, achieving a gain of 1.0613 dB in PSNR while reducing FLOPS by 84.28%. The code is available at https://***/lodew920/ERetinex. © 2025, CC BY.

关键词： Cameras

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Applications of MXenes in human-like sensors and actuators

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Nano Research 2023年第4期16卷 5767-5795页

作者： Jinbo Pang Songang Peng Chongyang Hou Xiao Wang Ting Wang Yu Cao Weijia Zhou Ding Sun Kai Wang Mark H.Rümmeli Gianaurelio Cuniberti Hong Liu Institute for Advanced Interdisciplinary Research(iAIR) Collaborative Innovation Center of Technology and Equipment for Biological Diagnosis and Therapy in Universities of ShandongUniversity of JinanJinan 250022China Institute for Materials Science and Max Bergmann Center of Biomaterials Technische Universität DresdenDresden 01069Germany Center for Advancing Electronics Dresden Technische Universität DresdenDresden 01069Germany Dresden Center for Computational Materials Science Technische Universität DresdenDresden 01062Germany Dresden Center for Intelligent Materials(GCL DCIM) Technische Universität DresdenDresden 01062Germany High-Frequency High-Voltage Device and Integrated Circuits R&D Center Institute of MicroelectronicsChinese Academy of SciencesBeijing 100029China Key Laboratory of Microelectronic Devices&Integrated Technology Institute of MicroelectronicsChinese Academy of SciencesBeijing 100029China Shenzhen Key Laboratory of Nanobiomechanics Shenzhen Institute of Advanced TechnologyChinese Academy of SciencesShenzhen 518055China State Key Laboratory of Biobased Material and Green Papermaking Qilu University of TechnologyShandong Academy of SciencesJinan 250353China School of Bioengineering Qilu University of TechnologyShandong Academy of ScienceJinan 250353China Key Laboratory of Modern Power System Simulation and Control&Renewable Energy Technology(Ministry of Education) Northeast Electric Power UniversityJilin 132012China School of Electrical Engineering Northeast Electric Power UniversityJilin 132012China School of Electrical Engineering Weihai Innovation Research InstituteQingdao UniversityQingdao 266000China School of Electrical and Computer Engineering Jilin Jianzhu UniversityChangchun 130118China Institute for Complex Materials Leibniz Institute for Solid State and Materials Research Dresden(IFW Dresden)20 Helmholtz StrasseDresden 01069Germany College of Energy Soochow Institute for Energy and Materials Innovations Soochow UniversitySuzhou 215006China Key L

Human beings perceive the world through the senses of sight,hearing,smell,taste,touch,space,and *** first five senses are prerequisites for people to *** sensing organs upload information to the nervous systems,including the brain,for interpreting the surrounding ***,the brain sends commands to muscles reflexively to react to stimuli,including light,gas,chemicals,sound,and ***,as an emerging two-dimensional material,has been intensively adopted in the applications of various sensors and *** this review,we update the sensors to mimic five primary senses and actuators for stimulating muscles,which employ MXene-based film,membrane,and composite with other functional ***,a brief introduction is delivered for the structure,properties,and synthesis methods of ***,we feed the readers the recent reports on the MXene-derived image sensors as artificial retinas,gas sensors,chemical biosensors,acoustic devices,and tactile sensors for electronic ***,the actuators of MXene-based composite are ***,future opportunities are given to MXene research based on the requirements of artificial intelligence and humanoid robot,which may induce prospects in accompanying healthcare and biomedical engineering applications.

关键词： MXenes sensors actuators gas sensors biosensors tactile sensors sound sensors artificial retina

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Image pixel value unification digital watermarking embedding method based on quantum key

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International Journal of Performability engineering 2019年第8期15卷 2277-2284页

作者： Wu, Jianan Zhang, Di Wang, Huan Zhu, Dexin Song, Lijun College of Computer Science and Technology Changchun University Changchun130022 China Institute for Interdisciplinary Quantum Information Technology Jilin Engineering Normal University Changchun130052 China Jilin Engineering Laboratory for Quantum Information Technology Jilin Engineering Normal University Changchun130052 China

At present, most watermarking algorithms use pseudo-random number sequences as watermarks, and the design of the algorithm is more focused on improving the concealment and robustness. The common problem is poor security of the watermark itself. At the same time, the frequency domain algorithm also has poor concealment. Based on quantum secure communication technology, this paper proposes a new frequency domain watermark embedding and extraction algorithm for secure communication. The algorithm, based on the principle of the BB84 protocol, uses the quantum key with true randomness generated by the mechanism for distributing the quantum key as the data source for preparing watermarks. Simultaneously, the quantum key is combined with the frequency domain wavelet transform watermarking algorithm to embed and extract the watermark. The results indicate that the proposed algorithm has high security, the same robustness as the classical frequency domain watermarking algorithm, and higher concealment than the frequency domain watermarking algorithm. © 2019 Totem Publisher, Inc. All rights reserved.

关键词： Wavelet transforms

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A quantum key-based mobile security payment scheme

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International Journal of Performability engineering 2019年第8期15卷 2165-2172页

作者： Zhu, Dexin Li, Xiaohui Wu, Jianan Song, Lijun College of Computer Science and Technology Changchun University Changchun130022 China Institute for Interdisciplinary Quantum Information Technology Jilin Engineering Normal University Changchun130052 China Jilin Engineering Laboratory for Quantum Information Technology Jilin Engineering Normal University Changchun130052 China

In view of the safety problem of current mobile security payment encryption schemes, this paper proposed a quantum key-based MSP (mobile security payment) scheme. First, this scheme introduced quantum encryption technology to solve the symmetric key problem between the payment platform server and the commercial supermarket server. Then, the quantum key was safely obtained and the QR (quick response) code was generated by using the proposed quantum key gateway. Finally, the mobile device finished the payment according to the one-time pad encryption scheme. Compared with the existing schemes, the proposed scheme can fully employ the advantages of quantum encryption technology. It can also resist multiple security threats by using the quantum key gateway. Under the real quantum key distribution and quantum key gateway environment, the feasibility and effectiveness of this scheme were proven by experimental results. © 2019 Totem Publisher, Inc. All rights reserved.

关键词： Quantum cryptography

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Theoretical and Experimental Investigation of On-Chip Mid-Infrared Chalcogenide Waveguide Ch4 Sensor Based on Wavelength Modulation Spectroscopy

SSRN

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SSRN 2022年

作者： Pi, Mingquan Huang, Yijun Zhao, Huan Peng, Zihang Lang, Jiaming Ji, Jialin Teng, Ling Song, Fang Liang, Lei Zhang, Yu Zheng, Chuantao Wang, Yiding Tittel, Frank K. State Key Laboratory of Integrated Optoelectronics College of Electronic Science and Engineering Jilin University 2699 Qianjin Street Changchun130012 China School of Mathematics and Statistics Changchun University of Science and Technology Changchun130022 China State Key Laboratory of Luminescence and Applications Changchun Institute of Optics Fine Mechanics and Physics Chinese Academy of Sciences Changchun130033 China Department of Electrical and Computer Engineering Rice University 6100 Main Street HoustonTX77005 United States

Compared with direct absorption spectroscopy (DAS), wavelength modulation spectroscopy (WMS) with good ability of suppressing noise is rarely used in waveguide sensor. The influence of waveguide parameters on WMS sensing performance is required to clarify in both theory and experiment. Three mid-infrared waveguide methane (CH4) sensors (trapezoid, rectangular, suspended) were proposed and optimized for WMS simulation. Theoretical formulation and the experimental sensing noise were used to numerically evaluate the key figure of merit more accurately. Simulation results were presented to show the influence of waveguide parameters on sensing performance. Two chalcogenide on magnesium fluoride (ChG-on-MgF2) trapezoid waveguide sensors were fabricated using lift-off method, and CH4 measurement was carried out using WMS. The waveguide loss was measured to be 1.57 dB/cm, leading to an optimal sensor length of 2.7 cm. The limit of detection (LoD) for the 1cm- and 2cm-long waveguide sensors are 0.68% and 0.17% with an averaging time of 0.2 s. The experimentally achieved second harmonic (2f) signal amplitude and LoD show good agreement with the theoretical results, verifying the feasibility of the design and analysis model of the WMS-based waveguide sensor. Due to the use of WMS and a reduction of waveguide loss from 3.6 to 1.57 dB/cm, the LoD of the 2cm-long ChG-on-MgF2 sensor is 24 times lower than our previously reported 2cm-long ChG-on-SiO2 sensor based on DAS. This work provides a systematic guidance for the design of waveguide gas sensor based on WMS and contributes to improving the sensitivity of on-chip gas sensing. © 2022, The Authors. All rights reserved.

关键词： Chalcogenides

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Efficient finite-volume simulation of the LWD orthogonal azimuth electromagnetic response in a three-dimensional anisotropic formation using potentials on cylindrical meshes

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Applied Geophysics 2020年第2期17卷 192-207,314,315页

作者： Wang Hao-Sen Wang Hong-Nian Yang Shou-Wen Yin Chang-Chun Hebei Institute of Architecture and Civil Engineering Zhangjiakou 075000China College of Physics Jilin UniversityChangchun 130012China College of Geo-exploration Science and Technology Jilin UniversityChangchun 130023China

In this study,the cylindrical finite-volume method(FVM)is advanced for the efficient and high-precision simulation of the logging while drilling(LWD)orthogonal azimuth electromagnetic tool(OAEMT)response in a three-dimensional(3 D)anisotropic *** overcome the ill-condition and convergence problems arising from the low induction number,Maxwell’s equations are reformulated into a mixed Helmholtz equation for the coupled potentials in a cylindrical coordinate *** electrical fi eld continuation method is applied to approximate the perfectly electrical conducting(PEC)boundary condition,to improve the discretization accuracy of the Helmholtz equation on the surface of metal *** the base,the 3 D FVM on Lebedev’s staggered grids in the cylindrical coordinates is employed to discretize the mixed equations to ensure good conformity with typical well-logging tool *** equivalent conductivity in a non-uniform element is determined by a standardization *** direct solver,PARDISO,is applied to efficiently solve the sparse linear equation systems for the multi-transmitter *** reduce the number of calls to PARDISO,the whole computational domain is divided into small windows that contain multiple measuring *** electromagnetic(EM)solutions produced by all the transmitters per window are simultaneously solved because the discrete matrix,relevant to all the transmitters in the same window,is ***,the 3 D FVM is validated against the numerical mode matching method(NMM),and the characteristics of both the coaxial and coplanar responses of the EM field tool are investigated using the numerical results.

关键词： finite-volume method orthogonal azimuth electromagnetic measurement Maxwell’s equation anisotropic formation logging while drilling(LWD)

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