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SSRN 2024年

作者： Zhu, Lin Nie, Xin He, Zhicheng Cheng, Aiguo Li, Eric Zhong, ShengZheng State Key Laboratory of Advanced Design and Manufacture Technology for Vehicle Hunan University Changsha410082 China Wuling New Energy Automobile Co. Ltd. Liuzhou545007 China School of Computing Engineering & Digital Technologies Teesside University Middlesbrough United Kingdom

Multi-sensor fusion for 3D object detection is a crucial development in autonomous vehicle technology. Current research primarily explores the combination of monocular cameras with LiDARs. However, there is a notable gap in the integration of stereo cameras with LiDARs. A significant drawback of the fusion between monocular cameras and LiDARs is its vulnerability to sensor failures, which can completely disable the system. This paper presents a novel end-to-end framework called SLBEVFusion, which leverages the effective combination of stereo cameras and LiDARs for 3D object detection. The framework utilizes the rich semantic and depth data from stereo images along with spatial data from LiDAR point clouds to improve detection accuracy. Moreover, it addresses sensor failures by isolating the data streams of each sensor and implementing straightforward feature fusion in Bird's Eye View (BEV) space. Comprehensive testing on the challenging KITTI dataset demonstrates that our approach significantly enhances performance in 3D object detection by merging stereo cameras with LiDARs. © 2024, The Authors. All rights reserved.

关键词： Semantics

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Organocatalytic Synthesis of Chiral Allene Catalyzed by Chiral Phosphoric Acid Via Asymmetric 1,8-Addition of Indole Imine Methide: Mechanism and Origin of Enantioselectivity

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SSRN 2022年

作者： Liang, Peng-Yu Shi, Shaoting Xu, Xin-Xin Zhang, Hai-Rong Che, Zheng Lu, Ka Yan, Chao-Xian Jin, Neng-Zhi Zhou, Pan-Pan State Key Laboratory of Applied Organic Chemistry Key Laboratory of Advanced Catalysis of Gansu Province Advanced Catalysis Center College of Chemistry and Chemical Engineering Lanzhou University 222 South Tianshui Road Lanzhou730000 China Key Laboratory of Cloud Computing of Gansu Province Gansu Computing Center 42 Qingyang Road Gansu Lanzhou730030 China

Organocatalytic synthesis of chiral allene can be successfully achieved through the reaction between propargylic alcohol and 3-phenylindole catalyzed by chiral phosphoric acid with high yield and high enantioselectivity. The detailed reaction mechanism and origin of enantioselectivity were uncovered by quantum mechanical calculations. The results indicate that the reactions undergo the dehydration process, the C–C bonding reaction, the hydrogen abstraction and the regeneration of catalyst. Eight possible pathways were found and the most favorable reaction paths leading to the major and minor products were evaluated which were consistent with the experimental results. The distortion/interaction analyses of the transition states in enantioselectivity-determining steps confirm the most favorable pathway in leading the major product. QTAIM and IGM analyses are used to illustrate the role of intermolecular interactions. This work would provide insightful viewpoints on the asymmetric organocatalytic reaction by chiral phosphoric acid. © 2022, The Authors. All rights reserved.

关键词： Hydrogen bonds

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Optimal Bilinear Equalizer for Cell-Free Massive MIMO Systems over Correlated Rician Channels

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IEEE Transactions on Signal Processing 2025年

作者： Wang, Zhe Zhang, Jiayi Bjornson, Emil Niyato, Dusit Ai, Bo Beijing Jiaotong University State Key Laboratory of Advanced Rail Autonomous Operation Beijing100044 China Beijing Jiaotong University School of Electronics and Information Engineering Beijing100044 China KTH Royal Institute of Technology Department of Computer Science Stockholm114 28 Sweden Nanyang Technological University College of Computing & Data Science 639798 Singapore

In this paper, we explore the low-complexity optimal bilinear equalizer (OBE) combining scheme design for cell-free massive multiple-input multiple-output networks with spatially correlated Rician fading *** provide a spectral efficiency (SE) performance analysis framework for both the centralized and distributed processing schemes with bilinear equalizer (BE)-structure combining schemes applied. The BE-structured combining is a set of schemes that are constructed by the multiplications of channel statistics-based BE matrices and instantaneous channel estimates. Notably, we derive closed-form achievable SE expressions for centralized and distributed BE-structured combining schemes. We propose one centralized and two distributed OBE schemes: Centralized OBE (C-OBE), Distributed OBE based on Global channel statistics (DG-OBE), and Distributed OBE based on Local channel statistics (DL-OBE), which maximize their respective SE expressions. OBE matrices in these schemes are tailored based on varying levels of channel statistics. Notably, we obtain new and insightful closed-form results for the C-OBE, DG-OBE, and DL-OBE combining schemes. Numerical results demonstrate that the proposed OBE schemes can achieve excellent SE, even in scenarios with severe pilot contamination. © 2025 IEEE. All rights reserved.

关键词： Fading channels

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A Robust Watermarking Scheme based on Delaunay Image Reconstruction Robust to Affine Transformation 6

A Robust Watermarking Scheme based on Delaunay Image Reconst...

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2021 6th International Symposium on Advances in Electrical, Electronics and Computer engineering, ISAEECE 2021

作者： Feng, Liu Gong, Daofu Wang, Wenbing State Key Laboratory of Mathematical Engineering and Advanced Computing Zhengzhou Science and Technology Institute Zhengzhou City Henan Province450000 China College of Software Engineering Zhengzhou University of Light Industry Zhengzhou City Henan Province450000 China

This paper proposes a sub-channel image reconstruction algorithm based on Delaunay triangle. First, according to the different sensitivity of the human eye to the three color channels, different channels are used to avoid the influence of watermark embedding on pixels around the feature points. Then, feature points should be selected on the selected channel to make them have sufficient robustness. At this time, the location of the feature points extracted on the corresponding channel can be used as the watermark embedding position. Finally, considering the influence of geometric attacks such as affine transformation, this paper proposes a reconstruction algorithm based on Delaunay triangle, which uses feature point information to reconstruct the image before the watermark extraction, and extract the watermark on the reconstructed image. The effect of watermark extraction has been improved. © Published under licence by IOP Publishing Ltd.

关键词： Image reconstruction

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A Dual-Watermarking Scheme Robust to Affine Transformation

A Dual-Watermarking Scheme Robust to Affine Transformation

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2021 International Conference on Computer Network Security and Software engineering, CNSSE 2021

作者： Liu, Feng State Key Laboratory of Mathematical Engineering and Advanced Computing Zhengzhou Science and Technology Institute Zhengzhou City Henan Province450000 China College of Software Engineering Zhengzhou University of Light Industry Zhengzhou City Henan Province450000 China

This paper proposes a robust watermarking algorithm based on dual watermarking and robust affine transformation. First, the color image is divided into three channels, feature point extraction, watermark embedding, and location watermark extraction will be performed respectively. Feature points are used for image reconstruction when extracting watermarks. The watermark embedding needs to select a square area not at the edge of the image as the watermark embedding position, and then embed the watermark in the frequency domain of the corresponding area. According to the watermark embedding position, extract the zero watermark in another channel as the location watermark. Because the zero watermark does not modify the original image information, it has good robustness and can assist the attacked image to locate the watermark embedding position. © Published under licence by IOP Publishing Ltd.

关键词： Image reconstruction

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Analysis and Improvement of a Conditional Privacy-Preserving Authentication Scheme with Double-Insurance in Vanets

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SSRN 2023年

作者： Wen, Jiaming Bai, Lu Liu, Jinhui Zhang, Huanguo Wang, Houzhen Key Laboratory of Aerospace Information Security and Trusted Computing Ministry of Education School of Cyber Science and Engineering Wuhan University Wuhan430072 China School of Cyber Security Northwestern Polytechnical University Xi’an710072 China State Key Laboratory of Cryptology Beijing100878 China Advanced Cryptography and System Security Key Laboratory of Sichuan Province Chengdu610025 China

As the intelligent transportation system develops by leaps and bounds, there is an increasing interest in the potential of Vehicular Ad-hoc Networks (VANETs) to enhance traffic efficiency and safety. The Conditional Privacy-Preserving Authentication (CPPA) scheme, which is suitable for solving anonymous authentication and message integrity during the communication, has been extensively studied to build the first line of defense for a secure VANET system. However, most existing Identitybased CPPA schemes rely on Tamper-Proof Devices (TPDs), which are susceptible to side-channel attacks. If the sensitive parameters stored in TPDs are compromised, the system could be completely ruined. In order to address this issue, Xiong et al. introduced a CPPA scheme with double-insurance, which was claimed to be secure against adaptively chosen message attacks. Unfortunately, we show in this paper that the scheme is universally forgeable, meaning that anyone can create a valid signature on any message, rendering the scheme inadequate for conditional privacy-preserving. After analyzing their shortcomings, we present a new scheme that addresses the issue, and formally proves its security under the Discrete Logarithms (DL) and Decisional Diffie-Hellman (DDH) assumptions. We also conducted experiments and simulations to evaluate our proposed scheme. The results demonstrate itssuperiority over similar schemes, indicating it is practical and effective in real-world scenarios. © 2023, The Authors. All rights reserved.

关键词： Vehicular ad hoc networks

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A secure spectrum auction scheme without the trusted party based on the smart contract

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Digital Communications and Networks 2021年第2期7卷 223-234页

作者： Jiaqi Wang Ning Lu Qingfeng Cheng Lu Zhou Wenbo Shi School of Computer Science and Engineerings Northeastern University Shenyang 110004China School of Computer Science and Technology Xidian UniversityXi'anChina Strategic Support Force Information Engineering University Zhengzhou450001China State Key Laboratory of Mathematical Engineering and Advanced Computing Zhengzhou450001China Division of Computer Science University ofAizuAizu-WakamatsuJapan School of Computer and Communication Engineering Nordieastem UniversityQinhuangdao066004China

With the development of communication 5G networks and technologies,spectrum resources are increasingly *** scarcity of the spectrum resource makes market-driven spectrum auction become an important means of spectrum allocation,and due to the complexity of the network environment,the security of spectrum auctions can not be *** existing secure spectrum auction schemes introduce a semi-honest agent to complete spectrum ***,the hypothetical semi-honest model does not guarantee the security of spectnim auction in the actual application scenario,which may lead to potential security threats:the agent may reveal the privacy of bidders,agent or auctioneer may collude with the bidder to manipulate the spectrum auction,and so *** this paper,a secure spectrum auction scheme without a trusted party is proposed based on the smart contract technology,and the smart contract written into the blockchain replaces the traditional semi-honest agent to cooperate with the auctioneer server to complete the *** order to ensure the security of our scheme,a secure spectrum auction protocol is designed,in which the Software Guard Extensions(SGX)technology and Paillier cryptosystem are used to protect the privacy of *** verification is provided in our protocol by using extensive Pedersen commitment,which prevents the auctioneer server and the bidder from colluding with each other and verifies group bid sum ***,the security analysis is given to propose several types of attacks that can be ***,theoretical analysis and simulation experiments of our protocol are also provided.

关键词： 5g Secure spectrum auction Bidders'bids'privacy Smart contract Public verification

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CRNet:3D Face Reconstruction with Contour Map Regression Network 6

CRNet:3D Face Reconstruction with Contour Map Regression Net...

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6th IEEE International Conference on Computer and Communications, ICCC 2020

作者： Wei, Tongxin Li, Qingbao Liu, Jinjin School of Software Zhengzhou University Zhengzhou China State Key Laboratory of Mathematical Engineering and Advanced Computing China

ISBN: (纸本)9781728186351

2D face images represent faces with incomplete information. 3D face reconstruction from a single 2D image is a challenging problem with application value. The single feature extraction method distorts the generated 3D face image. In this paper, we use contour-based face segmentation method to reconstruct 3D face image. We focus on the edge and contour information of the face when using contour lines to segment the face. Different from the global 3D face reconstruction method, we combine the global and local face information to carry out 3D face reconstruction. Our method: First of all, we do contour segmentation for human faces and extract the features of the segmented images. Second, we learn the local binary features of each keypoint in a complete face image, then combine the features and use linear regression to detect the keypoints. Thirdly, we use Convolutional Neural Networks to learn the regression 3D Morphable Model coefficient and significantly improve the quality and efficiency of reconstruction. We regressed the coefficients of the 3D deformable model from 2D images to present face alignment for 3D face reconstruction. We carry out feature mapping between 2D face and 3D face image, and monitor and verify 3D face model through mapping relationship. Our method can not only reconstruct face images from all angles, but also reduce face deformities. We made face images fit better under different expressions and postures. © 2020 IEEE.

关键词： Mapping

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GUEST EDITORIAL

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China Communications 2023年第2期 3-6页

作者： Yuan Wu Xu Chen Feng Lyu Xianfu Chen Xumin Huang Jie Gao Yueyue Dai Tony Q.S.Quek Yan Zhang the State Key Laboratory of Internet of Things for Smart City University of Macau the Department of Computer and Information Science University of Macau Sun Yat-sen University Sun Yat-sen University Institute of Advanced Networking and Computing Systems Sun Yat-sen University National and Local Joint Engineering Laboratory the School of Computer Science and Engineering Central South University the VTT Technical Research Centre of Finland the School of Automation Guangdong University of Technology the School of Information Technology Carleton University Huazhong University of Science and Technology Singapore University of Technology and Design(SUTD) the IEEE Communications Society Technical Committee on Green Communications and Computing(TCGCC)

With the growing maturity of the advanced edge-cloud collaboration and integrated sensing-communication-computing systems, edge intelligence has been envisioned as one of the enabling technologies for ubiquitous and l...

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Web Service Active Defense Mechanism Based on Automated Software Diversity

Web Service Active Defense Mechanism Based on Automated Soft...

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2020 International Conference on Computer engineering and Application, ICCEA 2020

作者： Liu, Zhenwu Zhang, Zheng Liu, Hao Ma, Bolin PLA Strategic Support Force Information Engineering University State Key Laboratory of Mathematical Engineering and Advanced Computing Zhengzhou China

ISBN: (纸本)9781728159041

Aiming at the problems of limited number and diversity in existing web server software, an active defense mechanism for web services based on automated software diversity is proposed, and the system framework and implementation are introduced. The formula proves that the probability of an attack escape event is low. Security and performance experiments show that the active defense mechanism of web services based on automated software diversity can resist or detect memory error attacks with less overhead, indicating that automated software diversity can effectively improve the security of web services. This verifies its effectiveness and feasibility. Finally, the research prospects and improvement directions are given according to the implementation granularity of automated software diversity and the monitoring granularity of web services. © 2020 IEEE.

关键词： Web services

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