Composite fault feature extraction for gears based on MCKD-EWT adaptive wavelet threshold noise reduction by Yanchang LV, Jingyue Wang, Chengqiang Zhang, Jianming Ding

“…Firstly, envelope entropy and information entropy are used as fitness functions, and the parameters of the MCKD algorithm are optimized by the improved particle swarm algorithm, then the empirical wavelet decomposition is carried out on the signals, and finally adaptive wavelet threshold denoising is carried out on the decomposed Intrinsic mode functions (IMFs) components. The results of experimental data analysis show that compared with the feature extraction methods such as spatial scale threshold EWT-MCKD and Complete Ensemble Empirical Mode Decomposition (CEEMDAN)-MCKD, the proposed method is more suitable for the diagnosis of gear composite faults in a strong background noise environment, the noise interference is effectively suppressed, and the extraction effect of gear composite fault features is more obvious.…”
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Interpretability Study on the Fault Diagnosis Model of the Heat pipe/ Vapor Compression Composite Air Conditioning System by ZHANG Yiqi, HUANG Shuoquan, LI Xiuming, DI Yanqiang, SONG Mengjie, HAN Zongwei

“…This study develops a composite fault diagnosis model based on typical machine learning algorithms, compares the diagnostic performance of different models, and finally conducts interpretability research on the diagnostic models using the SHAP method. …”
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XFEM for Fracture Analysis of Centrally Cracked Laminated Plates Subjected to Biaxial Loads by Shailesh Palekar, Achchhe Lal

“…In the present study, fracture response of centrally cracked symmetric angle ply laminated composite plates subjected to biaxially applied tensile, shear and tensile and shear combined stresses by implementing well established extended finite element method (XFEM) are studied. …”
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Effect of rapid high-intensity light curing on micro-leakage in conventional and bulk-fill resin composites by Yaojia Lu, Qi Cai, Dongyan Zhou

“…PurposeThis study compared the effect of high-intensity (3,200 mW/cm2) and conventional-intensity (1,000 mW/cm2) light curing on the micro-leakage properties of conventional and bulk-fill resin composites.MethodsCavities were respectively prepared on the mesial and distal surfaces of 60 molars. 3M™ Filtek™ One Bulk Fill Restorative (BF), 3M™ Filtek™ Z350 XT Universal Restorative (Z350), and 3M™ Single bond universal adhesive were used to fill the molars with different light-curing modes. …”
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Damage Identification of Conduit Rack in Offshore Platform Structures Based on a Novel Composite Neural Network by Jiaqiang Yan, Yuanchao Qiu, Renhe Shao, Ziqiao Ling, Ruixiang Zhang

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Fault Diagnosis of Hydraulic Pumps Using PSO-VMD and Refined Composite Multiscale Fluctuation Dispersion Entropy by Fuming Zhou, Xiaoqiang Yang, Jinxing Shen, Wuqiang Liu

“…And a new fault diagnosis method for hydraulic pumps using particle swarm optimization variational mode decomposition (PSO-VMD) and RCMFDE is proposed in this paper. …”
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Modal Parameter Identification and Damage Localization of Composite Helicopter Rotor Blades Based on AR/PR Identification by Zefeng Wang, Yuhan Sun, Jie Li, Zhiguang Song

“…Specifically, using the AR/PR (autoregressive/polyreference) time-domain identification method, experiments are designed to identify the modal parameters (natural frequency, modal damping ratio, and mode shape) of composite rotor blades based on acceleration and strain signals. …”
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New Anticracking Glass-Fiber-Reinforced Cement Material and Integrated Composite Technology with Lightweight Concrete Panels by Dong Chen, Junjie Deng, Baoquan Cheng, Qiong Wang, Baojun Zhao

“…At the same time, the influence of connection mode on the crack resistance of the GRC layer after compositing with precast lightweight concrete (PLC) was analyzed. …”
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Fracture resistance of endodontically treated teeth restored with indirect composite inlay and onlay restorations – An in vitro study by Ibraheem F. Alshiddi, Amjad Aljinbaz

“…Objective: The purpose of this in vitro study was to evaluate and compare the fracture resistance and fracture mode of extensive indirect inlay and onlay composite resin restorations performed for endodontically treated premolars. …”
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Optimisation of the composition of safe dental gel with IL-1β antagonist for the treatment of inflammatory periodontal diseases by О. О. Dmytriieva, I. F. Belenichev, B. S. Burlaka

“…For the design of the experiment, the methodology of the response surface (Box-Behnken Design) is used: Na CMC, Tween-80, D-panthenol; and four answers: pH, viscosity test, system type, mucoadhesive properties. Research methods: rheological research (viscosity test, amplitude test, frequency test, mucoadhesive test, thixotropy test) performed in oscillation mode on the modular compact Rheometer Anton Paar MCR 302 (CP50-1 SN71317), which, compared to cylindrical devices, requires a much smaller amount of gel sample and allows the planned tests in the oscillation mode, the temperature in the experiments was provided with a built-in thermostat (Peltier Temperature Control, C-PTD 200). …”
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Efficient optimum safety factor approach for system reliability-based design optimization with application to composite yarns by Gh. Kharmanda, I. R. Antypas

“…Several linear and nonlinear distribution laws are applied to composite yarns studies and then extended to multiple failure modes. …”
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Effect of Staining and External Bleaching on the Color Stability and Surface Roughness of Universal-Shade Resin-Based Composite by AlHabdan A, Alsuhaibani A, Alomran L, Almutib L

“…AlHanouf AlHabdan,1 Amal Alsuhaibani,2 Lama Alomran,2 Lulwah Almutib2 1Department of Restorative Dental Sciences, King Saud University, Riyadh, Saudi Arabia; 2College of Dentistry, King Saud University, Riyadh, Saudi ArabiaCorrespondence: AlHanouf AlHabdan, Department of Restorative Dental Sciences, King Saud University, Riyadh, Saudi Arabia, Email alhabdan@ksu.edu.saAim: This study evaluated the color stability and surface roughness of two universal-shade compared to two nanohybrid composites after staining and external bleaching with 40% hydrogen peroxide.Methods: Two universal shade resin-based composites and two nanohybrid composites were tested. …”
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Evaluation of monomer conversion, Vickers hardness, compressive strength & water sorption of commercial dental composite resins by Saadia Bano Lone, Usama Siddiqui, Nayab Amin, Munazzah Ejaz, Saad Liaqat, Anila Asif, Zohaib Khurshid

“…Material and Methods: Four commercially available resin-based composites were used. …”
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STUDYING THE INFLUENCE OF MICROWAVE RADIATION ON THE THERMOPHYSICAL CHARACTERISTICS OF REVERSED POLYMER COMPOSITION MATERIALS REINFORCED BY CARBON FIBERS by N. V. Bekrenev, I. V. Zlobina

“…The research was supported by RFBR grant No. 17-03-00720 «Methodology of optimising microconstruction of composite materials for complex shape objects with increased dynamic strength, formed layer-by-layer by electrotechnological methods».…”
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Dynamic characteristics study of composite base plate: numerical simulation, processing technology research and modal analysis by Fengfeng Wang, Guolai Yang, Lei Li, Xingxing Chang

“…The subspace method serves as the solution algorithm for the eigenvalue problem, which enables the computation of the modes of the composite base plate. …”
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Strength Analysis of Carbon Fiber Composite Flywheel Energy Storage Rotor Based on Progressive Damage Failure by Yajun Wang, Zezheng Wang, Yaze Lv, Yibing Liu

“…Composite materials consist of a matrix and fibers, and their failure modes differ significantly from those of isotropic materials. …”
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Vibration-Based, Nondestructive Methodology for Detecting Multiple Cracks in Bending-Torsion Coupled Laminated Composite Beams by Stephen R. Borneman, Seyed M. Hashemi

“…An algorithm is devised based on the Adam–Cawley criterion and extended to laminated composites with multiple cracks. This method has shown exceptional convergence on the size and location of cracks using a number of modes of free vibration with and without error in measured frequencies.…”
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Wave Propagation in a LRPC Composite Double Panel Structure with Periodically Attached Pillars and Etched Holes by Denghui QIAN

“…In order to reveal the bandgap properties of structure theoretically, the band structures, displacement fields of eigenmodes and transmission power spectrums of corresponding 8 × 8 finite structure are calculated and displayed by using finite element method (FEM). Numerical results and further analysis demonstrate that if the excitation and response points are picked on different sides of the structure, a wide band gap with low starting frequency is opened, which can be treated as the coupling between dominant vibrations of pillars and plate modes. …”
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FEATURES OF ELECTROMECHANICAL ACOUSTIC ENERGY CONVERSION BY CYLINDRICAL PIEZOCERAMIC TRANSDUCERS WITH INTERNAL SCREENS IN COMPOSITION OF FLAT SYSTEMS by A. G. Leiko, I. V. Kandrachuk, A. O. Sviatnenko

“…The purpose of the work is to determine the peculiarities of the electromechanical acoustic transformation of energy by cylindrical piezoceramic radiators with internal screens in the composition of flat systems, taking into account all types of interaction.The research was carried out by the method of bound fields in multiply connected domains with the use of addition theorems for the cylindrical wave functions. …”
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Synthesis, Characterization, and Enhanced Optical and Dielectric Properties of Pure and Ni-Doped ZnO Nanoparticles for Advanced Electronic Applications by Muhammad Fawad, Nabeel Maqsood, Ahmad Nawaz, Bilal Islam, Malik Daniyal Zaheer, Kateřina Skotnicová

“…This study focuses on the synthesis, characterization, and evaluation of the electrical and electronic properties of pure and Ni-doped ZnO nanoparticles (Ni:ZnO) synthesized via a co-precipitation method with varying Ni concentrations (2%, 4%, 6%, and 8%). …”
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