Article
Engineering, Mechanical
Yu Tian, Wei Feng, Miao'an Ouyang, Shuhao Yang, Weidong Zhao, Shuxiao Zhang
Summary: A novel six-degree-of-freedom compensation positioning algorithm for robotic arm-assisted medical bone drilling is proposed, which considers both positional and orientational errors of the robotic end. The algorithm improves the positioning capability of the drilling instrument end effector and achieves accurate control of medical drilling motion. The experiments demonstrate a significant reduction in position and angle errors, achieving high positioning accuracy of bone drilling.
PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART C-JOURNAL OF MECHANICAL ENGINEERING SCIENCE
(2023)
Article
Engineering, Multidisciplinary
Xiaoming Wang, Zifei Cao, Chuanzhi Sun, Ruirui Li, Yongmeng Liu, Jiubin Tan
Summary: This study focuses on the optimization of assembly coaxiality for multistage rotors with curvic couplings, proposing an indirect measurement method based on positioning and orientation errors, and deriving a mathematical expression for the relationship between coaxiality and assembly phase. Experimental results show significant reduction in coaxiality prediction errors and improvement in assembly accuracy using the proposed method.
Article
Multidisciplinary Sciences
Mohammad Tariqul Islam, Md Moniruzzaman, Touhidul Alam, Md Samsuzzaman, Qutaiba A. Razouqi, Ali F. Almutairi
Summary: This paper presents the design and investigation of a meander-lines-based epsilon negative metamaterial with a high effective medium ratio and near-zero refractive index for multiband microwave applications. The metamaterial unit cell shows negative permittivity, near-zero permeability, and near-zero refractive index in multiple frequency bands, and offers a compact design with a high effective medium ratio.
SCIENTIFIC REPORTS
(2021)
Article
Computer Science, Artificial Intelligence
Rosario Delgado
Summary: Ensembling of probabilistic classifiers, specifically through majority vote and weighted voting based on confidence level, enhances classifier accuracy, especially in binary cases. Additionally, in multi-class settings, the proposed weighted majority vote demonstrates greater robustness against estimation errors compared to other schemes.
APPLIED INTELLIGENCE
(2022)
Article
Green & Sustainable Science & Technology
Su-Fen Yang, Li-Pang Chen, Cheng-Kuan Lin
Summary: In this study, a new dispersion control chart with error correction is proposed by converting the observed distribution-free process variables into a flexible sign statistic and adjusting the measurement error effects. The proposed error-corrected dispersion control chart not only eliminates measurement error effects, but also provides more reliable control limits for monitoring process dispersion. Numerical examination shows that it is effective in handling moderate and large levels of measurement error and exhibits good out-of-control detection performance.
Article
Optics
Anton D. D. Zaitsev, Petr S. S. Demchenko, Natallya S. S. Kablukova, Anna V. V. Vozianova, Mikhail K. K. Khodzitsky
Summary: Negative group delay can occur in dispersive media within a specific frequency range, but it does not violate causality and is a result of waveform reshaping. This effect can be observed in various media such as photonic crystals, metamaterials, waveguides, apertures, prisms, and circuits at different frequencies. The current study focuses on designing a simple, tunable negative-group-delay medium for use in the THz frequency range. The medium consists of a bismuth-based frequency-selective surface on a dielectric substrate, and its properties can be adjusted both statically and dynamically. This medium has applications in THz photonics for phase-shift compensation, dispersion management in THz signal modulation systems, and encoding in next-generation wireless communication systems.
Article
Computer Science, Information Systems
Sujata Patil, Kavitha Rani Balmuri, Jaroslav Frnda, B. D. Parameshachari, Srinivas Konda, Jan Nedoma
Summary: Microarray datasets have been important in detecting triple negative breast cancer (TNBC) in recent decades. However, classifying microarray data is challenging due to redundant and irrelevant features. Feature selection is essential to eliminate non-required features from the system. The rough set-based feature selection algorithm is used to choose optimal feature values, and the ensemble classification technique is employed for classifying low-risk genes (non-TNBC) and high-risk genes (TNBC). Experimental evaluation demonstrates that the ensemble-based rough set model achieves a mean accuracy of 97.24%, surpassing other comparative machine learning techniques.
HUMAN-CENTRIC COMPUTING AND INFORMATION SCIENCES
(2022)
Article
Materials Science, Multidisciplinary
Amran Hossain, Mohammad Tariqul Islam, Norbahiah Misran, Md Shabiul Islam, Md Samsuzzaman
Summary: This paper introduces a spider net-shaped triple split ring resonator (SNTSRR) based epsilon-negative metamaterial with optimized dimensions for various microwave bands. The unit cell shows six resonant frequencies across different frequency ranges, demonstrating epsilon negative properties. The experimental validation confirms the compactness and effectiveness of the unit cell for quad-band microwave applications.
RESULTS IN PHYSICS
(2021)
Article
Engineering, Electrical & Electronic
Ruirui Li, Yongmeng Liu, Jiubin Tan
Summary: This article proposes a new measurement model that compensates and eliminates spatial cumulative errors in the measurement of rotor center of gravity by tracing the measurement errors to the machining errors. It improves the measurement accuracy and allows ultra-precision measurement of rotor center of gravity.
IEEE TRANSACTIONS ON INSTRUMENTATION AND MEASUREMENT
(2022)
Article
Engineering, Multidisciplinary
Leyang Wang, Wei Miao, Fei Wu
Summary: This study proposes a method that combines the ideas of differential method and sliding average to improve the accuracy of polar motion prediction. The results show that the proposed method outperforms the traditional method and has advantages over the IERS Bulletin-A in the medium-long term. The method also provides new ideas for other time-series forecasting studies.
MEASUREMENT SCIENCE AND TECHNOLOGY
(2023)
Article
Automation & Control Systems
Jie Zhou, Zhibin Jiang, Fu-Lai Chung, Shitong Wang
Summary: This article proposes a new SVM-based ensemble framework using a negative agreement learning (NAL) strategy to enhance the diversity of SVMs and suppress the training error in a joint training manner. Experimental studies show the effectiveness of the proposed ensemble framework.
IEEE TRANSACTIONS ON SYSTEMS MAN CYBERNETICS-SYSTEMS
(2021)
Article
Optics
Lijun Deng, Yangyu Fan, Qiong Zhao, Pengfei Wu
Summary: The accuracy of indoor visible light positioning (VLP) using line-of-sight (LOS) is directly influenced by the accuracy of received LOS power. However, the proportion of diffuse power in the total received power varies with the receiving orientation of the user equipment (UE), leading to inaccuracies in distance determination. To address this issue, we employed channel estimation and Parseval's theorem to remove the diffuse component from the total received power, resulting in improved localization accuracy.
Article
Computer Science, Information Systems
Panagiotis J. Gripeos, Dimitrios Kriempardis, Konstantinos Aidinis, Hector E. Nistazakis
Summary: In this paper, the performance of FSO communication in terms of outage probability and bit error rate is analyzed and estimated by studying group velocity dispersion and time jitter. Mathematical expressions for these performance metrics are derived using a specific approximation method. Numerical results are also presented using realistic parameter values.
Article
Mathematics, Interdisciplinary Applications
P. J. Gripeos, D. Oreinos, D. Kriempardis, A. D. Tsigopoulos, E. Kapotis, A. Katsis, H. E. Nistazakis
Summary: FSO communications are a convenient, wireless, high-data-rate technology in global telecom networking, but their performance is limited by physical phenomena such as chromatic dispersion and time jitter, which can cause signal fading and misdetection.
Article
Optics
Hang Dong, Zhixin Sun, Jingyi Li, Yahui Li, Wei Zhang, Guangyong Jin
Summary: This paper calculates thermal stresses and adsorption forces to determine laser cleaning conditions and establishes relevant models. Experimental results show that the removal effect is better with increasing nanosecond pulse delay, with the best effect achieved at 600 milliseconds pulse delay. Based on the findings, the mechanisms of oxide film removal involve thermal stress against adsorption and plasma shock wave breaking the oxide layer.
OPTICS COMMUNICATIONS
(2024)
Article
Optics
Junjie Zhang, Wenjun Li, Bingtao Li, Zheng-Da Hu, Jicheng Wang, Feng Zhang, Lei Wang
Summary: A multilayer thin film device structure based on Tamm plasmons is proposed for high-performance near-infrared hot electron photodetectors. By optimizing the device structure parameters, high responsivity detection can be achieved.
OPTICS COMMUNICATIONS
(2024)
Article
Optics
Hong Huang, Zhiguang Han
Summary: This paper proposes a new ghost imaging reconstruction method using ordered orthogonal Hadamard derived speckle as the illumination speckle series, and introduces the alternating direction multiplier method to improve the imaging performance. The evaluation results show that the method can achieve high-quality reconstructed images under low sampling conditions.
OPTICS COMMUNICATIONS
(2024)
Article
Optics
Moritsugu Sakamoto, Yuki Ono, Kohei Noda, Tomoyuki Sasaki, Nobuhiro Kawatsuki, Masayuki Tanaka, Hiroshi Ono
Summary: The effect of wavelength and polarization of illuminating light in polarization imaging for birefringent objects placed behind a scattering structure was experimentally investigated. The result shows that the spatial distribution of the birefringent object was more clearly visualized in the longer wavelength combined with circularly polarized light illumination. This finding indicates the potential of using polarization imaging with circularly polarized light illumination in the near-infrared range for visualizing birefringent objects with scattering.
OPTICS COMMUNICATIONS
(2024)
Article
Optics
Peihui Du, Hongfang Wang, Pengwei Li, Rukeyemuhan Abadula, Hmbat Batelbek, Min Gao
Summary: In this study, we theoretically demonstrate the strong coupling between Tamm plasmons and exciton polaritons in metal Al/DBR-molecular structures, extending the operating wavelength to the deep ultraviolet region. The coupling strength can be effectively manipulated by adjusting the structure parameters, offering potential benefits for the development of new-style optical filters.
OPTICS COMMUNICATIONS
(2024)
Article
Optics
Priyanka Chaudhary, Akhilesh Kumar Mishra
Summary: We design and numerically investigate the switching dynamics between two outer waveguides in a parity-time (PT)-symmetric adiabatically coupled three waveguides nonlinear directional coupler (NLDC) system. The study shows that the device can provide switching even when the middle waveguide is nonlinear and the outer waveguides are linear. Furthermore, the effect of loss to gain ratio on critical switching power and the impact of launched light power and gain (loss) value on transmitted power are also studied.
OPTICS COMMUNICATIONS
(2024)
Article
Optics
Wei Feng, Yongcong Yi, Shuyang Li, Zhi Xiong, Boya Xie, Zhen Zeng
Summary: Traditional imaging techniques are ineffective in achieving clear underwater imaging due to the presence of scattering media. Single-pixel imaging (SPI) system based on Unet++ offers a solution for reconstructing high-quality images in highly turbid water environments.
OPTICS COMMUNICATIONS
(2024)
Article
Optics
Xiaorui Qu, Jufeng Zhao, Haijun Tian, Junjie Zhu, Guangmang Cui
Summary: This paper studies the structural similarity between RGB and spectral images and proposes a non-iterative Images Structure Similarity (ISS) method for fast reconstruction of spectral images. Additionally, the input of the Deep Image Prior (DIP) method is optimized for the first time by using the initial spectral data reconstructed by ISS, leading to an improved starting value for the iteration. The experimental results show that the proposed method can enhance the reconstruction quality in both spectral and spatial resolutions, while significantly reducing the reconstruction time compared to other DIP-based methods.
OPTICS COMMUNICATIONS
(2024)
Article
Optics
Donghe Sheng, Zhe Han, Zanyang Qiao, Tianpei Dong, Chenxi Wang, Huiping Tian
Summary: In this study, a distributed multi-parameter sensor based on an etched few-mode multi-core fiber is proposed, allowing simultaneous sensing of temperature, strain, and sample refractive index. By combining space division multiplexing and stimulated Brillouin scattering, the sensor achieves high sensitivity in detecting these parameters.
OPTICS COMMUNICATIONS
(2024)
Article
Optics
Dehao Chen, Zhenwu Mo, Zehong Liang, Junjie Jiang, Huilin Tang, Yidan Sun, Ziyu Wang, Quanfeng Wei, Yanru Chen, Dongmei Deng
Summary: In this study, a novel family of elliptical Airyprime vortex beams (EAPVBs) is introduced, which inherits the excellent self-focusing properties of the circular Airyprime vortex beam (CAPVB). The asymmetric focusing of EAPVB leads to some novel properties, such as the splitting of high-order optical vortex and the formation of two foci. By taking advantage of these properties, EAPVB is constructed as a tunable optical bottle for particle capture.
OPTICS COMMUNICATIONS
(2024)
Article
Optics
Xiao Ma, Qiongchan Shao, Jian-Jun He
Summary: In this study, an SHS chip based on Su8 waveguide was designed and fabricated. By physically adjusting the metal electrodes and compensating for transmissivity fluctuations, the generation of side ripples was successfully suppressed.
OPTICS COMMUNICATIONS
(2024)
Article
Optics
Hongbin Zhang, Jiansen Du, Zongtao Chi, Hailin Cong, Bin Wang
Summary: In this paper, a novel type of dual-wavelength confocal metalens is proposed to solve the spatial crosstalk between two wavelengths. The metalens can greatly reduce the spatial crosstalk and achieve high precision and efficiency in confocal imaging. It can also focus light in specific wavelength ranges, making it suitable for imaging, microscopy, and optical fiber communication.
OPTICS COMMUNICATIONS
(2024)
Article
Optics
Rui Qiu, Guanmao Zhang, Shaokai Du, Jie Liu, Hongyu Jib, Kaiyun Bi, Bochuan Xing, Guangchao Diao
Summary: Recent research has developed an achromatic metalens that shows potential for replacing traditional lenses. This study focuses on a continuously variable focus height broadband achromatic metalens for long-wavelength infrared applications. By optimizing materials and parameters, chromatic aberration is effectively corrected, making it suitable for high-resolution LWIR imaging and spectroscopy systems.
OPTICS COMMUNICATIONS
(2024)
Article
Optics
Marcos Troncoso-Costas, Gaurav Jain, Yiming Li, Mohammed Patel, Lakshmi Narayanan Venkatasubramani, Sean O'Duill, Frank Smyth, Andrew Ellis, Francisco Diaz-Otero, Colm Browning, Liam Barry
Summary: In this work, a fast-switching tuneable laser capable of wide wavelength coverage, low noise and linewidth levels suitable for high-order modulation formats is demonstrated. The laser is characterized to cover a wavelength range of 35 nm in the C-band with nanosecond switching time. It is used to successfully demonstrate 480 Gbit/s 16QAM transmission over 25 km of single-mode fiber for a wavelength range of 19 nm.
OPTICS COMMUNICATIONS
(2024)
Article
Optics
Takeshi Moriyasu, Masahiko Tani, Hideaki Kitahara, Takashi Furuya, Jessica Afalla, Toshiro Kohmoto, Daishiro Koide, Hiroki Sato, Mitsutaka Kumakura
Summary: Optical pump-terahertz probe spectroscopy was used to study the photocarrier dynamics and optical characteristics of semiconductor Si. The results showed that the thickness of Si influenced the transmitted terahertz field amplitude and peak delay time, indicating differences in photocarrier dynamics between different Si materials.
OPTICS COMMUNICATIONS
(2024)