Article
Engineering, Electrical & Electronic
Ahmet Guner, Ali Ozen
Summary: A new multicarrier modulation scheme based on lifting wavelet transform was proposed in this paper for coherent optical communication systems. This new wave scheme provided improved performance in terms of bit error rate and reduction in peak to average power ratio compared to conventional cyclic prefix based OFDM. It was found that the new wave scheme could extend the transmission distance by 100 km and 150 km for QPSK and 16QAM, respectively, due to its ability to provide more frequency localization than OFDM.
JOURNAL OF LIGHTWAVE TECHNOLOGY
(2021)
Article
Computer Science, Information Systems
Agnieszka Szczesna, Adam Switonski, Janusz Slupik, Hafed Zghidi, Henryk Josinski, Konrad Wojciechowski
Summary: In this study, a new method of classification based on quaternion attributes and multiscale feature extraction is introduced to address human gait recognition. The results show that the proposed system achieves high accuracy on the dataset.
INFORMATION SCIENCES
(2021)
Article
Engineering, Electrical & Electronic
Gyanendra, Samba Raju Chiluveru, Balasubramanian Raman, Manoj Tripathy, Brajesh Kumar Kaushik
Summary: This brief introduces a novel VLSI architecture for computing discrete wavelet packet transform, which achieves continuous flow of data using bit-reordering circuit and serial wavelet filter. The proposed architecture reduces memory requirement by more than 50%, achieves 100% hardware utilization ratio, and reduces area and power requirements by more than 60% and 50%, respectively.
IEEE TRANSACTIONS ON CIRCUITS AND SYSTEMS II-EXPRESS BRIEFS
(2021)
Article
Materials Science, Multidisciplinary
Peilu Li, Chunguang Xu, Qinxue Pan, Yuren Lu, Shuangyi Li
Summary: This paper introduces the application of the lifting scheme wavelet packet transform (LSWPT) denoising method to suppress noise in LCR wave signals, showing that it has fast calculation speed and good denoising effect for online ultrasonic measurement of residual stress on rail surfaces.
Article
Computer Science, Information Systems
Zahmoul Rim, Ejbali Ridha, Zaied Mourad
Summary: An improved image cryptography method based on lifting wavelet transform, Latin square, and wide range Beta chaotic map is proposed in this paper. The scheme encrypts only the requisite components of sensitive data, providing an efficient technique for partial image encryption and decryption in the theme of secure communication. The results of the ciphered images show good performance compared to previous schemes.
MULTIMEDIA TOOLS AND APPLICATIONS
(2021)
Article
Engineering, Multidisciplinary
Shuo Zhang, Zhiwen Liu, Sihai He, Yunping Chen
Summary: A fault diagnosis method based on adaptive redundant lifting wavelet dictionary and Bayesian biorthogonal sparse representation algorithm is proposed. By integrating the Bayesian model and adaptive redundant lifting wavelet dictionary, the accuracy of signal reconstruction and fault feature extraction is improved.
STRUCTURAL HEALTH MONITORING-AN INTERNATIONAL JOURNAL
(2023)
Article
Engineering, Multidisciplinary
S. C. Shiralashetti, M. H. Kantli, A. B. Deshi
Summary: This paper developed a wavelet lifting scheme using orthogonal and biorthogonal wavelets for the numerical solution of dynamic Reynolds equation for micropolar fluid lubrication, showing higher accuracy and speed of convergence in lesser computational time compared to existing methods. Examples given in the paper demonstrate the applicability and attractiveness of the proposed method.
INTERNATIONAL JOURNAL OF COMPUTATIONAL METHODS
(2021)
Article
Mathematics, Applied
Owais Ahmad, Neyaz A. Sheikh, Kottakkaran Sooppy Nisar, Firdous A. Shah
Summary: This article introduces the concept of biorthogonal nonuniform multiresolution analysis and conducts research on it. The necessary and sufficient conditions for the translates to form Riesz bases are established, the biorthogonality characteristics of scaling functions and wavelet families are provided, and it is shown that under mild assumptions wavelets can generate Reisz bases.
MATHEMATICAL METHODS IN THE APPLIED SCIENCES
(2021)
Article
Mathematics
Xiaohui Zhou, Gang Wang
Summary: This paper constructs the biorthogonal wavelet function on a smooth curve L using the length-preserving projection and Euler discretization method, discussing its properties, symmetry, and providing an example on a logarithm curve L. Finally, a numerical application for financial data processing is presented.
JOURNAL OF MATHEMATICS
(2021)
Article
Engineering, Electrical & Electronic
Shaohui Li, Wenrui Dai, Ziyang Zheng, Chenglin Li, Junni Zou, Hongkai Xiong
Summary: This paper introduces a novel deep architecture, Rev-AE, which utilizes Rev-Blocks to create a stable reversible network for image reconstruction. By combining nonlinear CNN with traditional signal processing tools, Rev-AE bridges the gap between existing techniques and achieves stable and robust image reconstruction.
IEEE TRANSACTIONS ON SIGNAL PROCESSING
(2021)
Article
Computer Science, Artificial Intelligence
M. Anju, J. Mohan
Summary: This paper proposes an innovative image compression scheme by utilizing the Adaptive Discrete Wavelet Transform-based Lifting Scheme. The new DWT lifting method achieves filter execution through upper and lower triangular matrices and innovative matrix multiplication. Additionally, the optimal tuning is achieved through Lioness-Integrated Whale Optimization Algorithm.
INTERNATIONAL JOURNAL OF PATTERN RECOGNITION AND ARTIFICIAL INTELLIGENCE
(2022)
Article
Environmental Sciences
Ling Tian, Yu Cao, Zishan Shi, Bokun He, Chu He, Deshi Li
Summary: This paper proposes a novel sparse density feature extraction method based on the relationship between the lifting scheme and convolution, which improves detection precision while keeping computational complexity almost the same as strided convolution. Experimental results on remote sensing target detection indicate that the proposed method enhances both detection performance and network efficiency.
Article
Computer Science, Information Systems
Pabitra Pal, Partha Chowdhuri, Tapas Si
Summary: Digital image watermarking is an important tool for preventing unauthorized use and alteration of digital images. This study proposes an efficient authentication scheme for watermarking medical images using Support Vector Machine and Lifting Wavelet Transform. The scheme separates the Region of Interest from the Non-Region of Interest in the medical image using SVM, and embeds watermark information in the NROI using LWT. The method is tested on an extensive image database and evaluated using various metrics to measure its imperceptibility and robustness.
MULTIMEDIA TOOLS AND APPLICATIONS
(2023)
Article
Engineering, Electrical & Electronic
Di Liu, Adam Dysko, Qiteng Hong, Dimitrios Tzelepis, Campbell D. Booth
Summary: This study proposes a novel protection scheme based on transient wavelet energy for detecting faults and locating faulted feeders in microgrids. Compared to existing protection schemes, the proposed scheme is highly immune to changes in system fault level, fault types and positions, microgrid operating status, and inverter control strategies, while also requiring lower sampling frequency.
IEEE TRANSACTIONS ON SMART GRID
(2022)
Article
Computer Science, Artificial Intelligence
Xiuhui Chen, Mengxin Gong, Zhihua Gan, Yang Lu, Xiuli Chai, Xin He
Summary: This paper introduces a novel color image encryption method based on the lifting scheme and cross-component permutation. By preprocessing and performing element permutation operations, the pixel distribution of the image is changed. The pixel values of the permuted components are altered using a random diffusion method, resulting in a ciphertext image. Experimental results demonstrate that the proposed scheme has good security and effectiveness.
COMPLEX & INTELLIGENT SYSTEMS
(2023)
Article
Engineering, Manufacturing
Dong He, Yamin Li, Zhaoyu Li, Kai Tang
Summary: This paper presents a new method for planning the five-axis machining process of complex parts, utilizing curved intermediate surfaces influenced by the part's convex hull and generated with the geodesic distance field. The proposed method aims to improve the stiffness and stability of the workpiece during machining by alternating between roughing and finishing operations. Physical cutting experiments confirmed the advantages of this method.
JOURNAL OF MANUFACTURING SCIENCE AND ENGINEERING-TRANSACTIONS OF THE ASME
(2021)
Article
Engineering, Industrial
Zhaoyu Li, Kai Tang
Summary: This paper presents an algorithm for generating a five-axis tool path for machining freeform surfaces, which achieves a significant improvement in machining efficiency by using non-spherical cutters and adaptively adjusting tool posture and feed direction while satisfying various constraints.
JOURNAL OF MANUFACTURING SYSTEMS
(2021)
Article
Computer Science, Interdisciplinary Applications
Yao-An Lu, Kai Tang, Cheng-Yong Wang
Summary: Effective planning of joint motion is essential in robotic applications such as welding, milling, and laser cutting. Kinematic redundancy in six-axis industrial robots can be utilized to optimize joint motion, ensuring smoothness and collision-free operation. Existing methods often fail to fully exploit this redundancy, prompting the development of a new optimization approach presented in this paper.
ROBOTICS AND COMPUTER-INTEGRATED MANUFACTURING
(2021)
Article
Computer Science, Interdisciplinary Applications
Zhaoyu Li, Pengcheng Hu, Fubao Xie, Kai Tang
Summary: This paper presents a multi-layer five-axis trochoidal milling method for machining an arbitrary 3D deep slot, aiming at minimizing the total cutting time while satisfying the critical physical constraints on the tool. Both computer simulation and physical cutting experiments confirm the feasibility and advantages of the proposed method.
ROBOTICS AND COMPUTER-INTEGRATED MANUFACTURING
(2021)
Article
Engineering, Manufacturing
Zhaoyu Li, Dong He, Ke Xu, Fubao Xie, Kai Tang
Summary: This paper presents a five-axis trochoidal milling tool path planning algorithm for machining arbitrary 3D curved cavities. The algorithm aims to minimize the use of the rotary axis with the largest moment of inertia, while meeting various constraints such as the cutting force threshold. Computer simulations and physical cutting experiments confirm the feasibility and advantages of the proposed method.
JOURNAL OF MANUFACTURING SCIENCE AND ENGINEERING-TRANSACTIONS OF THE ASME
(2022)
Article
Engineering, Manufacturing
Zhaoyu Li, Qianhang Yan, Kai Tang
Summary: This paper presents a new method for multi-pass flank milling of thin-walled workpieces, aiming to reduce total machining time while preventing deflection of both the tool and workpiece. By optimizing feed rate and depth-of-cut in each pass, significant time savings can be achieved without sacrificing accuracy.
JOURNAL OF MANUFACTURING PROCESSES
(2021)
Article
Engineering, Manufacturing
Xiangyu Li, Junxue Ren, Ximing Lv, Kai Tang
Summary: This study proposes a collaborative optimization method to improve the roughing efficiency of the leading edge protection cap (LPC) cavity of composite fan blades. By optimizing the conical cutter sequence, machining ranges, and cutting parameters, the highest material removal efficiency is achieved.
JOURNAL OF MANUFACTURING PROCESSES
(2021)
Article
Computer Science, Software Engineering
Fubao Xie, Xishuang Jing, Chengyang Zhang, Siyu Chen, Danjie Bi, Zhaoyu Li, Dong He, Kai Tang
Summary: Continuous multi-axis printing is gaining attention for its advantages in eliminating the need for support and reducing stair-step effects. However, concavity issues pose challenges, especially in metal printing. This paper introduces a novel curved layer decomposition algorithm based on ellipsoidal surfaces, using skeletonization to generate ellipsoidal printing layers for complex freeform solid models. Preliminary experiments show positive validation of the proposed methodology.
COMPUTER-AIDED DESIGN
(2022)
Article
Computer Science, Software Engineering
Dong He, Zhaoyu Li, Yamin Li, Kai Tang
Summary: In this study, a new algorithm for planning multi-pass flank milling for complex freeform surface mesh was proposed. The method partitions the design surface mesh and generates tool paths based on a tangent vector field, approximating each partitioned patch to satisfy all machining constraints, ultimately reducing flanking machining error.
COMPUTER-AIDED DESIGN
(2021)
Article
Engineering, Multidisciplinary
G. Urbikain Pelayo, D. Olvera-Trejo, M. Luo, K. Tang, L. N. Lopez de Lacalle, A. Elias-Zuniga
Summary: The study proposes a method to balance productivity and sustainability by evaluating different rough milling operations using a specific cutting energy or sustainable productivity gain factor. Experimental data confirms that serrated end milling with the highest SPG value is the best milling operation in terms of power consumption and mass removal rate.
Article
Engineering, Mechanical
Shenghui Wang, Yuansheng Zhou, Jinyuan Tang, Kai Tang, Zhengminqing Li
Summary: This study presents a method to address the challenges of digital tooth contact analysis in face gear drives, including establishing an accurate measurement model and reconstructing it using B-spline fitting technology. By conducting sensitivity analysis to determine the measurement coordinate system and simplifying the meshing equation, the nonlinearity is reduced to achieve DTCA. The effectiveness of the proposed method is verified through finite element analysis and rolling tests.
MECHANISM AND MACHINE THEORY
(2022)
Article
Computer Science, Software Engineering
Dong He, Zhaoyu Li, Xiangyu Li, Yamin Li, Kai Tang
Summary: Flank milling is a preferred method for machining heavy and large industrial parts. However, determining a collision-free multi-pass flank milling tool path is extremely difficult. This paper presents an algorithm that establishes a collision-conscious vector field to determine the tool path and satisfies the maximum cusp height requirement. Experimental results confirm the correctness and effectiveness of the proposed method.
COMPUTER-AIDED DESIGN
(2023)
Article
Automation & Control Systems
Zhaoyu Li, Kai Tang, Pengcheng Hu, Lihua Huang
Summary: This paper introduces a new trochoidal sweep scanning path for freeform surface inspection, which solves the problem of oscillation in current scanning paths and significantly improves the kinematic performance of the inspection device. Both computer simulation and physical inspection experiments demonstrate the feasibility and superiority of the proposed method in terms of inspection stability and efficiency compared to traditional oscillating sweep scanning paths.
IEEE TRANSACTIONS ON AUTOMATION SCIENCE AND ENGINEERING
(2023)
Article
Computer Science, Software Engineering
Tak Yu Lau, Li Chen, Dong He, Zhaoyu Li, Kai Tang
Summary: This paper presents a scalar field-based multi-axis printing process planning algorithm and an adaptive slicing algorithm to overcome the limitations of conventional 2.5D additive manufacturing. These two algorithms determine a complete multi-axis printing process for any solid model, guaranteeing printability and achieving shorter fabrication time and better surface quality.
COMPUTER-AIDED DESIGN
(2023)
Article
Engineering, Manufacturing
Danjie Bi, Fubao Xie, Kai Tang
Summary: The emerging multi-axis fused deposition modeling (FDM) printing process is a powerful technology for fabricating complicated 3D models. A new efficiency indicator called the material deposition rate is proposed to optimize the printing path and achieve higher printing efficiency and quality.
JOURNAL OF MANUFACTURING AND MATERIALS PROCESSING
(2021)
