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Enhanced Chimp Optimization Algorithm Using Attack Defense Strategy and Golden Update Mechanism for Robust COVID-19 Medical Image Segmentation

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Journal of Bionic Engineering 2024年第4期21卷 2086-2109页

作者： Amir Hamza Morad Grimes Abdelkrim Boukabou Samira Dib Non Testing Destructive Laboratory Faculty of TechnologyUniversity of Jijel18000JijelAlgeria Laboratory of Renewable Energy Faculty of TechnologyUniversity of Jijel18000JijelAlgeria

Medical image segmentation is a powerful and evolving technology in medical *** fact,it has been identified as a very effective tool to support and accompany doctors in their fight against the spread of the coronavirus(COVID-19).Various techniques have been utilized for COVID-19 image segmentation,including Multilevel Thresholding(MLT)-based meta-heuristics,which are considered crucial in addressing this ***,despite their importance,meta-heuristics have significant ***,the imbalance between exploration and exploitation,as well as premature convergence,can cause the optimization process to become stuck in local optima,resulting in unsatisfactory segmentation *** this paper,an enhanced War Strategy Chimp Optimization Algorithm(WSChOA)is proposed to address MLT *** strategies are incorporated into the traditional Chimp Optimization *** update mechanism that provides diversity in the ***,the attack and defense strategies are incorporated to improve the search space leading to avoiding local *** experimental results were conducted by comparing WSChoA with recent and well-known algorithms using various evaluation metrics such as Feature Similarity Index(FSIM),Structural Similarity Index(SSIM),Peak signal-to-Noise Ratio(PSNR),Standard deviation(STD),Freidman Test(FT),and Wilcoxon Sign Rank Test(WSRT).The results obtained by WSChoA surpassed those of other optimization techniques in terms of robustness and accuracy,indicating that it is a powerful tool for image segmentation.

关键词： Image processing Segmentation Optimization Chimp Golden update mechanism Attack-defense strategy COVID-19

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Optical and radiative properties of coated black carbon during hygroscopic growth and retrieval errors of mixing state using single-particle soot photometer

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Particuology 2025年第2期97卷 183-192页

作者： Jia Liu Donghui Zhou Cancan Zhu Jinbao Han Bo Yin Non-destructive Testing Laboratory School of Quality and Technical SupervisionHebei UniversityBaoding071002China Engineering Research Center of Zero-carbon Energy Buildings and Measurement Techniques Ministry of EducationHebei UniversityBaoding071002China Hebei Key Laboratory of Energy Metering and Safety Testing Technology Hebei UniversityBaoding071002China

Under environment with various water contents,the variations in the mixing state and particle size of coated black carbon(BC)aerosols cause changes in optical and radiative *** this study,fractal models for thinly,partially,and thickly coated BC under six relative humidities(RHs=0–95%)are constructed and optically simulated at 1064 and 532 *** scattering cross-sections are selected to retrieve the mixing state(D_(p)/D_(c))of BC to investigate the possible retrieval errors caused by the nonspherical morphology when using the single-particle soot photometer(SP2).Furthermore,the radiative forcing of BC aerosols at different RHs are *** showed that the retrieval errors(REs)of D_(p)/D_(c) are negative for coated particles with BC volume fraction smaller than 0.10,indicating that the mixing states of coated fractal BC are underestimated during the hygroscopic *** partially-coated BC has the best retrieval accuracy of the mixing state,followed by the closed-cell and coated-aggregate model,judging from averaged *** forcing enhancements for partially-coated aerosols with different BC volume fractions exponentially increase to opposite values,resulting in a warming or cooling *** study helps understand the uncertainties in Dp/Dc of BC aerosols retrieved by SP2 and their radiative forcing at different RHs.

关键词： BC aerosol Hygroscopic growth SP2 Mixing state Radiative forcing

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Epitaxy growth of pure phase CeFeO_(3) thin films with high magneto-optical performance and strong vertical magnetic anisotropy

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Journal of Rare Earths 2023年第12期41卷 2018-2024,I0007页

作者： Nanxi Lin Fangliang Sheng Xin Chen Xiaolin Hu Naifeng Zhuang College of Chemistry Fuzhou UniversityFuzhou350108China Key Laboratory of Non-destructive Testing Technology Fujian Polytechnic Normal UniversityFuqing350300China Fujian Science&Technology Innovation Laboratory for Optoelectronic Information of China Fuzhou350108China

The magneto-optical effects of rare earth ferrite can be greatly improved by doping Ce^(3+)***_(3)with high Ce^(3+)concentration has excellent magneto-optical properties in *** due to its perovskite structure it is more suitable to be deposited on the substrates of optical devices compared with the commercial garnet *** this paper,the pure phase Ce_(x)Fe_(2-x)O_(3)films were successfully obtained on the quartz glass and <100>-oriented SrTiO3crystal substrates by radio frequency magnetron *** effects of substrate and Ce:Fe ratio on the epitaxial orientation,magnetism and magnetooptical performance of films were systematically *** the Ce1.0Fe1.0O3/STO film,its MCD ellipticity(ψF) intensity can reach up to 4750(°)/cm in the visible band and 14090(°)/cm in near ultraviolet *** it also shows a strong vertical magnetic anisotropy,which makes it maintain a good thermal stability when the device size is *** mean that the Ce_(1.0)Fe_(1.0)O_(3)/STO film has a promising application in integrated optical communication devices.

关键词： Magneto-optical effect Thin film Magnetic anisotropy Magnetic circular dichroism Cerium Rare earths

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Remote condition monitoring of rail tracks using distributed acoustic sensing(DAS):A deep CNN-LSTM-SW based model

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Green Energy and Intelligent Transportation 2024年第5期3卷 70-85页

作者： Md Arifur Rahman Suhaima Jamal Hossein Taheri The Laboratory for Advanced Non-Destructive Testing In-situ Monitoringand Evaluation(LANDTIE)Department of Manufacturing EngineeringGeorgia Southern UniversityStatesboro 30458GAUSA Information Technology Department Georgia Southern UniversityStatesboro 30458GAUSA

Railroad condition monitoring is paramount due to frequent passage through densely populated *** significance arises from the potential consequences of accidents such as train derailments,hazardous materials leaks,or collisions which may have far-reaching impacts on communities and the surrounding *** a solution to this issue,the use of distributed acoustic sensing(DAS)-fiber optic cables along railroads provides a feasible tool for monitoring the health of these extended ***,analyzing DAS data to assess railroad health or detect potential damage is a challenging *** to the large amount of data generated by DAS,as well as the unstructured patterns and substantial noise present,traditional analysis methods are ineffective in interpreting this *** paper introduces a novel approach that harnesses the power of deep learning through a combination of CNNs and LSTMs,augmented by sliding window techniques(CNN-LSTM-SW),to advance the state-of-the-art in the railroad condition monitoring *** well as it presents the potential for DAS and fiber optic sensing technologies to revolutionize the proposed CNN-LSTM-SW model to detect conditions along the rail track *** insights from the data of High tonnage load(HTL)-a 4.16 km fiber optic and DAS setup,we were able to distinguish train position,normal condition,and abnormal conditions along the ***,our investigation demonstrated that the proposed approaches could serve as efficient techniques for processing DAS signals and detecting the condition of railroad infrastructures at any remote distance with DAS-Fiber optic cable ***,in terms of pinpointing the train's position,the CNN-LSTM architecture showcased an impressive 97%detection *** a sliding window,the CNN-LSTM labeled data,the remaining 3%of misclassified labels have been improved dramatically by predicting the exact locations of each type of ***,these prop

关键词： Distributed acoustic sensing(DAS)-Fiber optic cable Railroad condition monitoring and anomaly detection High tonnage load(HTL) Convolutional neural network-long short-term memory-sliding window(CNN-LSTM-SW)

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Digital Image Quality Assessment technology for Weld Radiographic Film Based on ROI Multi-Indicator Fusion 7

Digital Image Quality Assessment Technology for Weld Radiogr...

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7th IEEE Information technology, Networking, Electronic and Automation Control Conference, ITNEC 2024

作者： Yang, Bo Yan, Haobo Jiang, Hongquan Zhang, Xiaoming Zhou, Zhi Bao, Rui Tian, Weilong Shaanxi Xiyu Non-destructive Testing Co. Ltd. Xi'an China Xi'an Jiaotong University State Key Laboratory for Manufacturing Systems Engineering Xi'an China Shaanxi Special Equipment Inspection and Testing Research Institute Xi'an China

ISBN: (纸本)9798350370782

The digital image quality of weld seam radiographic inspection film is crucial for enabling intelligent defect detection and information management. However, current image quality assessment methods often overlook the characteristics and quality requirements of the region of interest (ROI) in weld seam radiographic films. To address these issues, this paper introduces a digital image quality assessment method based on the multi-indicators fusion of weld radiographic films' ROI. First, four basic image quality indicators were established based on the national standard GB/T 26141.2, which reflect the overall contrast and noise level of digital images. Then, two key quality indicators were established that reflect the digitization quality of ROI regions in images and the level of noise resistance. Finally, an indicator fusion strategy based on the entropy weight method was formulated for image quality assessment. Validated with enterprise data, the results show a correlation coefficient of 0.8197 between the proposed method and expert assessments, meeting the quality assessment requirements for enterprise X-ray images. © 2024 IEEE.

关键词： Reflection

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Fast Imaging Method of Total Focusing Method in Nozzle Weld Inspection

Fast Imaging Method of Total Focusing Method in Nozzle Weld ...

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2023 IEEE Far East NDT New technology and Application Forum, FENDT 2023

作者： Xu, Qian Wang, Hai-Tao Nanjing University of Aeronautics and Astronautics College of Automation Engineering China Nanjing University of Aeronautics and Astronautics Key Laboratory of Non-Destructive 'Testing and Monitoring' Technology for High-Speed Transport Facilities The Ministry of Industry and Information Technology Nanjing China

ISBN: (纸本)9798350303544

The development of phased array ultrasonic testing (PAUT) using the total focusing method (TFM) has led to improved quality in the detection and characterization of defects that may occur in device components. The transducer is usually coupled to the specimen via the plexiglass wedge to allow for the transfer of energy into target areas when using PAUT with full matrix capture (FMC). Due to the vast number of transmission delay sequences and the calculation power necessary to receive the focus for ultrasonic inspection using PAUT with FMC, a time-efficient technique for finding the incidence point is critical. This paper describes a segmental search method (SSM) for quickly determining the point of incidence of a wedge dual-layer medium. The search interval was narrowed by imposing the constraint that the point of incidence should be between the source and the target. In addition, finding the appropriate step size for the search range minimized the time spent on search processing. This method can be computationally more efficient than the analytical method (ANM) and Newton iteration method (NIM) used to solve Snell's law and can ensure beam accuracy. © 2023 IEEE.

关键词： Focusing

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Multi-field Coupled Inverse Hall–Petch Relations for Ferroelectric Nanocrystals

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Acta Mechanica Solida Sinica 2024年第1期37卷 139-147页

作者： Xiaodong Zhang Wei Yan Xuhui Lou Yujun Chen Zhihong Zhou Qingyuan Wang Lianhua Ma Xiaobao Tian Non-Destructive Testing Laboratory School of Quality and Technical SupervisionHebei UniversityBaoding 071002China AVIC Huiyang Aviation Propeller Co. LtdBaoding 071051China Department of Mechanics and Engineering Sichuan UniversityChengdu 610065China Yibin Institute of Industrial Technology Sichuan University Yibin ParkYibin 644000China Research Institute of Interdisciplinary Sciences(RISE) Dongguan University of TechnologyDongguan 523808China School of Materials Science and Engineering Dongguan University of TechnologyDongguan 523808China

Tailoring grain size can improve the strength of polycrystals by regulating the proportion of grains to grain boundaries and the interaction *** the grain size decreases to the nanoscale,the deformation mechanism in polycrystals shifts from being primarily mediated by dislocations to deformation occurring within the grains and grain ***,the mechanism responsible for fine-grain strengthening in ferroelectric materials remains unclear,primarily due to the complex multi-field coupling effect arising from spontaneous *** molecular dynamics simulations,we investigate the strengthening mechanism of barium titanate(BaTiO3),with extremely fine-grain *** material exhibits an inverse Hall–Petch relationship between grain size and strength,rooting in the inhomogeneous concentration of atomic strain and grain ***,we present a theoretical model to predict the transition from the inverse Hall–Petch stage to the Hall–Petch stage based on strength variations with size,which aligns well with the simulation *** has been found that the piezoelectric properties of the BaTiO3 are affected by polarization domain switching at various grain *** study enhances our understanding of the atomic-scale mechanisms that contribute to the performance evolution of fine-grain nano-ferroelectric *** also provides valuable insights into the design of extremely small-scale ferroelectric components.

关键词： Ferroelectrics Multi-field coupling Molecular dynamics Fine-grain reinforcement Inverse Hall-Petch effect

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A high stability quantum dot light emitting diode using inorganic copper thiocyanate in an air atmosphere

A high stability quantum dot light emitting diode using inor...

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2022 International Conference on Optics and Machine Vision, ICOMV 2022

作者： Sun, Juan Zhang, Qin Wen, Yu Hai, Xia Liu, Wei Yan, Zhenzhen Xu, Zhangwang Ding, Lei Mational&Local Joint Engineering Laboratory For Non-Destructive Testing and Optoelectronic Sensing Technology Application College of Testing and Optoelectronic Engineering Nanchang Hangkong University Jiangxi Nanchang China

ISBN: (纸本)9781510653238

Luminance and lifetime are key indicators for quantum dot light-emitting diodes(QLEDs) applications. Improving the hole function layer is a more effective method in many strategies for developing high-stability QLEDs. In our research, it was confirmed that QLEDs which use copper thiocyanate (CuSCN) has better performance than using traditional materials of poly(3,4-ethylene dioxythiophene): poly(styrene sulfonate) (PEDOT: PSS). The energy level of the device after using CuSCN is more matched, the transmittance of the red light band is higher, and making the hole injection capacity stronger. Luminance and service life have been increased by 53% and 68.5%, respectively. This work has far-reaching significance for the preparation of low-cost,and high-stability QLED devices that contribute to commercialization. © 2022 SPIE

关键词： Luminance

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The design and investigation of hydrogel-based metamaterials with ultra large negative hygroscopic expansion ratio

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International Journal of Smart and Nano Materials 2022年第1期13卷 114-129,I0007页

作者： Lian-Hua Ma Su-Dong Wang Jia Liu Hong Gao Wei Zhou Non-destructive Testing Laboratory School of Quality and Technical SupervisionHebei UniversityBaodingHebei071002China National&local Joint Engineering Research Center of Metrology Instrument and System Hebei UniversityBaodingHebei071002China Hebei Key Laboratory of Energy Metering and Safety Testing Technology Hebei UniversityBaodingHebei071002China Material Reliability Center China academy of space technologyBeijing100029China

A design strategy for a mechanical metamaterial with large negative hygroscopic expansion(NHE)was proposed in this *** from the reported structures,the present metamaterial is designed by constructing repeated lattice microstructure consisting of curved ligaments incorporating hydrogel active layers and polymer support layers and straight polymer *** immersed in the solution environment,the swelling of hydrogel layer of such composite structure induces the reversed bending of the ligament,leading to the overall ultra-large shrink(negative expansion)deformation of the *** the new structural design,large NHE effects can be *** theoretical investigation and finite element analysis(FEA)were conducted to demonstrate the large negative expansion effects of such *** results showed that the effective NHE ratio of the metamaterial is dependent of the curvature of the curved ligament and the size of both the ligament and the connecting *** ultra-large NHE ratios about−80%for the 2D structure and−90%for the 3D version can be obtained by adopting the structural *** newly designed metamaterials have potential applications in medical and other fields.

关键词： Hydrogel-based metamaterial structural design negative hygroscopic expansion active deformation

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Low-coherence interferometric dimensional measurement technique based on synchrosqueezed wavelet transform

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Optics Express 2025年第10期33卷 20192-20201页

作者： Tian, Yuqi Dang, Hong Zhang, Pengyu Yu, Liang Feng, Kunpeng Cui, Jiwen Deng, Hu Shang, Liping School of Information Engineering Southwest University of Science and Technology Mianyang621010 China State Key Laboratory of Optical Fiber and Cable Manufacture Technology Department of EEE Southern University of Science and Technology Shenzhen518055 China Joint Laboratory for Extreme Conditions Matter Properties Southwest University of Science and Technology 59 Qinglong Road Sichuan Mianyang621010 China Sichuan Vocational and Technical College of Communications Chengdu611130 China School of Civil Aviation Northwestern Polytechnical University Xi’an710072 China Key Laboratory of Non-Destructive Testing and Monitoring Technology for High-Speed Transport Facilities Nanjing University of Aeronautics and Astronautics Nanjing211106 China Ministry of Industry and Information Technology Harbin150080 China

This paper addresses the issue of reduced measurement stability in low-coherence measurement techniques when applied to glass-based dispersive media. A high-precision, low-coherence interferometric measurement method is proposed based on synchrosqueezed Wavelet Transform (SSWT). First, the Schott dispersion formula is used to analyze the impact of glass-based dispersive media on the phase of the interference spectrum. Wavelet transform is then employed to extract the chirp information of the interference spectrum, enabling the separation of optical path lengths for different wavenumbers. Building upon this, SSWT is introduced to enhance time-frequency resolution further, improving the measurement performance of the system. An experimental setup is constructed to validate the effectiveness of the proposed method. Compared to traditional methods, SSWT optimizes the distribution of wavelet coefficients, concentrating signal energy and significantly improving instantaneous frequency capture accuracy. Experimental results show that, in addition to effectively capturing chirp characteristics and reducing phase noise, SSWT achieves a 3-fold and 7-fold improvement in peak full-width at half-maximum compared to conventional Fourier Transform (FT) and Continuous Wavelet Transform (CWT), respectively, and a 9.1-fold and 17.1-fold improvement in standard deviation over 20 measurements, demonstrating superior noise resistance and measurement precision. In conclusion, the SSWT-based white-light interferometric measurement method provides a high-precision, reliable solution for dimensional measurements in industrial applications. © 2025 Optica Publishing Group under the terms of the Optica Open Access Publishing Agreement.

关键词： Interferometry

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