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A power load forecasting model based on a combined neural network Aip Adv. (IF 1.6) Pub Date : 2024-04-17 Jie Li, Chenguang Qiu, Yulin Zhao, Yuyang Wang
The supply of electric power is vital for the daily lives of people, industrial production, and business services. At present, although enough electric power can be supplied to meet the power demand, there are still some challenges, especially in terms of long-distance power transmissions and long-term power storage. Consequently, if the power production capacity exceeds the immediate consumption requirements
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Quantum sensing effect of electron tunneling in DQD/analyte complex Aip Adv. (IF 1.6) Pub Date : 2024-04-17 I. Filikhin, B. Vlahovic, A. Joseph, T. Alston, J. Oxley
We investigate electron tunneling between quantum dots and molecules to propose a quantum sensor. This sensor consists of double quantum dots (DQD) with energy levels specifically tailored to mirror those of the target analyte. By analyzing the spectral distribution of electron localizations in the DQD system, we can delineate the analyte’s spectrum and deduce its composition by comparing it with a
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Survival prediction of ovarian serous carcinoma based on machine learning combined with pathological images and clinical information Aip Adv. (IF 1.6) Pub Date : 2024-04-17 Rong Zhou, Bingbing Zhao, Hongfan Ding, Yong Fu, Hongjun Li, Yuekun Wei, Jin Xie, Caihong Chen, Fuqiang Yin, Daizheng Huang
Ovarian serous carcinoma (OSC) has high mortality, making accurate prognostic evaluation vital for treatment selection. This study develops a three-year OSC survival prediction model using machine learning, integrating pathological image features with clinical data. First, a Convolutional Neural Network (CNN) was used to classify the unlabeled pathological images and determine whether they are OSC
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Low-frequency acoustic isolation performance of Helmholtz cavity acoustic metamaterials with bilateral single openings Aip Adv. (IF 1.6) Pub Date : 2024-04-17 PeiZhou Hu, Jing-Bo Zhao, Hong Liu, XiaoSheng Zhang, Hong Yao, Guang-jun Zhang
In this study, we designed a single-opening Helmholtz chamber type acoustic metamaterial with two sides. The complexity of the open channel results in the material having a low frequency of the first sound insulation peak and excellent sound insulation performance. The research indicates that this type of acoustic metamaterial has many sound insulation peaks in the frequency range of 20–1200 Hz. The
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Machinability of different cutting tool materials for electric discharge machining: A review and future prospects Aip Adv. (IF 1.6) Pub Date : 2024-04-17 M. S. Tufail, Jayant Giri, Emad Makki, T. Sathish, Rajkumar Chadge, Neeraj Sunheriya
Electric Discharge Machining (EDM) is essential for shaping and cutting tool steel. EDM’s precision in machining difficult materials and tool steel characteristics are well known. EDM efficiency requires reliable performance measurement parameters. The physical shape and mobility of the electrode tool are critical in EDM research. Layer machining is an advanced method that removes material in a sequential
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Computing the solution trajectories, steady state approximation, and sensitivity analysis in complex chemical reaction mechanism Aip Adv. (IF 1.6) Pub Date : 2024-04-17 Faisal Sultan, Muhammad Wasim Lodhi, Rida Fatima, Muhammad Shoaib Ishaq, Gilbert Chambashi
Ordinary differential equations are often employed in chemical kinetics mathematical modeling. The theoretical results for a model of a multi-step chemical kinetic process are presented in this article. This model seeks to describe both the complicated kinetics of complex chemical processes and the steady state behavior of chemical species. Reduction techniques are used to divide fast and slow processes
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Dual-band flexible metamaterial absorber working in 5G band Aip Adv. (IF 1.6) Pub Date : 2024-04-17 Jianfei Zhu, Guoliang Gao, Weien Lai
This article presents a thin and flexible artificial electromagnetic absorber with two absorption peaks at frequencies of 28 and 39 GHz for 5G communication. Copper and a flexible FR4 substrate are used in a pyramid-shaped layered configuration, achieving absorption rates exceeding 99% at 28 and 39 GHz. The thickness of the proposed structure is only 0.34 mm, which is ∼1/32 and 1/23 of the corresponding
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Disclosing the carrier distributions in ion-implanted HgCdTe p–n junctions with scanning capacitance microscopy Aip Adv. (IF 1.6) Pub Date : 2024-04-17 Zhaoyang Huang, Chun Lin, Hao Xie, Rui Xin, Xiang Li, Tianxin Li
Ion implantation doping is the primary method for forming p–n junctions in HgCdTe. However, the doping and activation in HgCdTe are influenced by various complex factors, leading to inconsistencies between the actual carriers and the distribution of impurities. Currently, there are few experimental reports on nanoscale carrier distribution in HgCdTe photovoltaic structures. In this study, we employed
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Design and application research of portable reversible thermochromic patches in grid power supply systems Aip Adv. (IF 1.6) Pub Date : 2024-04-16 He Liu, Lixin Jiao, Haidan Lin, Lina Li
This study aims to develop a novel portable reversible thermochromic patch and evaluate its potential applications in temperature monitoring and indication. The film is based on the concept of electronic charge transfer thermochromic coatings, enabling accurate detection of high temperatures. Experimental results demonstrate that when the temperature of the monitored device’s circuit reaches 70 °C
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Thermodynamic properties of rhodium—A first principle study Aip Adv. (IF 1.6) Pub Date : 2024-04-16 Balaram Thakur, Xuejun Gong, Andrea Dal Corso
The high-pressure and high-temperature thermodynamic properties of rhodium (up to 2000 K and 300 GPa) are presented using the first principle approach within the quasi-harmonic approximation. The thermal Helmholtz free energy includes the contribution of both phonon vibrations and electronic excitations. The performance of three popular exchange-correlation functionals—local density approximation [Perdew
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Accurate low-energy pulse system for intravascular lithotripsy Aip Adv. (IF 1.6) Pub Date : 2024-04-16 Jiacheng Ren, Qihui Shen, Jingzhen Shao, Ying Lin, Xu Liang
In response to biomedical imperatives, a novel approach is presented for the endovascular management of atherosclerosis. This approach is grounded in the electrohydraulic effect of a precisely controlled low-energy pulse discharge system, coupled with sequential control within the incomplete discharge electrode, to generate shockwaves aimed at softening blood vessels and rupturing calcified plaques
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Influence of reactive environment on the growth of graphene by CVD method Aip Adv. (IF 1.6) Pub Date : 2024-04-16 D. Selvakumar, R. Loganathan, R. Jayavel
Scalable graphene was grown on commercially purchased Cu foil by using the chemical vapor deposition method with a growth temperature and time of 900 °C and 30 min, respectively. The growth mechanism was investigated in a different reactive environment (gas flow). The crystallinity of the surface absorbed chemical species was identified through x-ray diffraction analysis. The structural morphology
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Experimental study on the double-skyhook controls of semi-active suspension with variable inertance and damping Aip Adv. (IF 1.6) Pub Date : 2024-04-15 Jiamei Nie, Xiangyu Peng, Jiayao Zhu, Xiao-Liang Zhang
As a conventional control approach, the skyhook damping control algorithm can respond to changes in road circumstances but not to those in load circumstances. The skyhook inertance control algorithm, a newly developed control approach, may adapt to changes in load circumstances rather than in road circumstances. The recent introduction of double-skyhook control algorithms has allowed vehicle suspension
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Strength characteristics of self-compacting concrete with alkali-activated fly ash Aip Adv. (IF 1.6) Pub Date : 2024-04-15 Liang Chen, Yu Tang
The primary goal of this study is to examine the impact of sodium hydroxide (NaOH)/alkali-activated fly ash on the fresh properties and mechanical properties of self-compacting concrete (SCC). The fresh properties, known as the workability of SCC characteristics, were determined using the U-box, V-funnel, J-ring, and L-box tests. The M30 grade SCC containing superplasticizer of 0.86 wt. % of cement
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Effect of copper addition on mechanical properties and microstructures of LM25 cast alloys Aip Adv. (IF 1.6) Pub Date : 2024-04-15 Kapil Surani, Miguel Villagómez Galindo, Hiteshkumar Patel, Vladimir Ivanovich Velkin, Md Irfanul Haque Siddiqui, Abhinav Kumar, Jayant Giri, Intesaaf Ashraf, Mohd Asif Shah
The use of aluminum alloys in automobiles is expanding, and the potential for additional increases is significant. Further growth will be determined by improvements in material qualities for existing applications or the discovery of new applications. Alloy A-356 (LM25) is commonly employed for high-quality alloy wheel rims in various motor vehicles, constituting 40% of global car usage. This study
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Optimized low carbon scheduling strategy of integrated energy sources considering load aggregators Aip Adv. (IF 1.6) Pub Date : 2024-04-15 Xiu Li Wang, Huanyu Guo, Fushuan Wen, Kai Wang
In the context of the global low-carbon energy development strategy, the massive influx of renewable energy leads to the instability of the power system, so it is necessary to carry out effective scheduling strategy and management mechanism for energy. On this basis, the Integrated Energy System including Electricity/Heat/Storage (EHSIES) is discussed in this paper. First, an ordered clustering method
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Data-driven fault diagnosis method for abnormal RF oscillation of gyrotrons Aip Adv. (IF 1.6) Pub Date : 2024-04-15 Haibiao Zhang, Zege Wu, Huaichuan Hu, Xiaojie Wang
Gyrotrons are vacuum electronic devices capable of generating high-power, high-frequency THz radiation. With the increasing utilization of gyrotrons in thermonuclear fusion experimental devices, achieving higher output performance and ensuring stable and reliable operation have become key development goals. However, occasional radio frequency (RF) oscillation faults inside the gyrotron during long-pulse
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Early detection of skin cancer using AI: Deciphering dermatology images for melanoma detection Aip Adv. (IF 1.6) Pub Date : 2024-04-15 R. Deepa, Ghayth ALMahadin, Prashant G C, A. Sivasamy
This Review explores the transformative impact of artificial intelligence (AI) on the early detection of skin cancer, with a specific focus on melanoma, a potentially lethal form of the disease. Beginning with an overview of traditional diagnostic methods and their limitations, this paper delves into the evolution of AI within dermatology, emphasizing its application in image analysis and pattern recognition
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Understanding the spread of typhoid fever: Combining vaccination and sanitation methods for better public health policies Aip Adv. (IF 1.6) Pub Date : 2024-04-15 Alhassan Ibrahim, Usa Wannasingha Humphries, Ibrahim Mohammed, Rahat Zarin
Typhoid fever remains a major public health concern, affecting over nine million individuals globally each year. Mathematical modeling approaches can provide valuable insights into typhoid transmission dynamics and inform preventive strategies. In this study, we developed a compartmental model incorporating key features of typhoid epidemiology and two crucial interventions: vaccination and sanitation
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Oxidation state of cobalt oxide in thermal-cyclic atomic layer etching of cobalt by plasma oxidation and organometallization Aip Adv. (IF 1.6) Pub Date : 2024-04-15 Sumiko Fujisaki, Yoshihide Yamaguchi, Hiroyuki Kobayashi, Kazunori Shinoda, Masaki Yamada, Kohei Kawamura, Masaru Izawa
Thermal-cyclic atomic layer etching of Co blanket film and a fine pattern by plasma oxidation and organometallization were investigated. To obtain a smoothly etched surface and self-limiting etching, a two-step temperature-etching process was used. Co was first oxidized using O2 plasma at a low temperature of 25 °C. Then, the Co oxide formed in the first step was organometallized with acetylacetone
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Design and simulation optimization of phase-locked loop structure for phase-shifting power supply Aip Adv. (IF 1.6) Pub Date : 2024-04-15 Qingchan Liu, Tengbin Li, Yao Zhong, Cong Lin, Junlin Zhang, Zhengang Zhao
A phase-locked loop (PLL) of a phase-shifting power supply for the power system is designed in this paper. Taking the industrial frequency current as the reference signal, the input and output characteristics of the phase-frequency detector with charge pump are analyzed. In addition, the transfer function of the PLL system is analyzed by combining the passive second-order low-pass filter and the voltage-controlled
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A novel dynamic image watermarking technique with features inspired by quantum computing principles Aip Adv. (IF 1.6) Pub Date : 2024-04-15 Ramesh Gorle, Anitha Guttavelli
This research proposes a novel dynamic image watermarking technique with features inspired by quantum computing principles. This method encodes binary values into qubits and embeds a watermark into an original image. The watermarking process is achieved by utilizing quantum circuits to manipulate the qubits representing the pixel values of the original and watermark images. To extract the watermark
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Physical interpretation on development and validation of the reaction routes of complex chemical kinetic model Aip Adv. (IF 1.6) Pub Date : 2024-04-15 Faisal Sultan, Rida Fatima, Muhammad Shoaib Ishaq, Gilbert Chambashi
Simulating the complexity in its entirety proves highly challenging, to examine both the local and global stability of the model, as well as its positivity, recognizing the overall instability. To address this challenge, a strategy of splitting down the multi-route complex reactions into its independent sub-routes is employed. For the validation of sub-routes, the stability and positivity of each individual
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Numerical investigation of core plate of pyramid-type lattice sandwich with resonant rings Aip Adv. (IF 1.6) Pub Date : 2024-04-15 Chengfei Li, Zhaobo Chen
The pyramid-type lattice sandwich panel is known for its exemplary mechanical characteristics. In this study, we draw inspiration from the local resonance mechanisms observed in acoustic metamaterials and introduce a resonant ring to enhance the capabilities of the panel for damping low-frequency vibrations. We use the finite element method to develop a model to explore the band structure and the corresponding
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Parametric analysis of pollutant discharge concentration in non-Newtonian nanofluid flow across a permeable Riga sheet with thermal radiation Aip Adv. (IF 1.6) Pub Date : 2024-04-12 Xiao Xin, Abdul Hamid Ganie, Maher Alwuthaynani, Ebenezer Bonyah, Hamiden Abd El-Wahed Khalifa, Dowlath Fathima, Muhammad Bilal
Proper wastewater disposal is crucial in various manufacturing and ecological systems. This study aims to prevent and regulate pollution in the water supply. It examines how the pollutant discharge concentration affects the flow of non-Newtonian nanofluids (NNNFs) over a porous Riga surface. Two different types of NNNFs, namely, Walter’s B and second-grade fluids, have been examined. The fluid flow
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Research on the mechanism and process optimization of pulsed laser descaling of Q235 steel for offshore equipment Aip Adv. (IF 1.6) Pub Date : 2024-04-12 Zhiyuan Yang, Wendong Qu, Wen Cai, Shanshan Shi, Zhonghan Yu, Yuantao Zhao, Yanlong Xu, Wenge Li, Xiancheng Rong, Yanbo Liu
Corrosion pervades in every field of the public domain, with a particularly pronounced impact in the marine environment. Laser descaling technology, heralded as an environmentally conscious method, is progressively gaining prominence within the maritime domain. The associated theories and procedures have incrementally assumed a central role in scholarly investigations. This study meticulously delves
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First-principles calculation of phase transitions and mechanical properties of (CoCrNi)100−xAlx (0 ≤ x ≤ 28 at. %) high-entropy alloys Aip Adv. (IF 1.6) Pub Date : 2024-04-12 Leilei Li, Shangyu Zhai
In the two-phase high-entropy alloys (HEAs) (i.e., FCC, BCC), the modulation of the BCC phase is crucial for improving the mechanical properties of FCC-type HEAs. The stability of the phase of (CoCrNi)100−xAlx (0 ≤ x ≤ 28 at. %) HEAs is studied using first-principles calculations. The Al content on the phase transition of CoCrNi HEAs is discussed. The theoretical values of lattice parameter a (x) increase
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Spatiotemporal evaluation of five satellite-based precipitation products under the arid environment of Saudi Arabia Aip Adv. (IF 1.6) Pub Date : 2024-04-12 Abdulnoor Ali Jazem Ghanim, Muhammad Naveed Anjum, Raid Saad Alharbi, Muhammad Aurangzaib, Usama Zafar, Abdur Rehamn, Muhammad Irfan, Saifur Rahman, Salim Nasar Faraj Mursal, Saleh Alyami, Redhwan M. Algobahi, Ali Alhamami
In arid regions like Saudi Arabia, accurate precipitation data are crucial for water resource management and climate studies. However, satellite-based precipitation products (SPPs) can contain uncertainties, impacting their reliability. This study evaluated the accuracy of five high-resolution SPPs [IMERG-V06 variants, Tropical Rainfall Measuring Mission (TRMM)-3B42V7, and Soil Moisture to Rain (SM2RAIN)-Advanced
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Acoustic and optical plasmons excitation in double-channel AlGaN/GaN HEMT under asymmetric boundaries Aip Adv. (IF 1.6) Pub Date : 2024-04-12 Hongyang Guo, Shengpeng Yang, Ping Zhang, Runxian Xing, Guohao Yu, Shaomeng Wang, Yubin Gong
We have simulatively studied the electrical excitation of acoustic and optical plasmons in double-channel AlGaN/GaN high electron mobility transistors (HEMT) under asymmetric boundaries. By solving the self-consistent hydrodynamic model with Maxwell’s equations, it is found that the drift plasmons are excited in the bilayer 2DEGs under asymmetric boundaries. The oscillation intensity in a bilayer system
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Perceptions and attitudes of dental practitioners toward robotic dentistry and artificial intelligence in Saudi Arabia Aip Adv. (IF 1.6) Pub Date : 2024-04-12 Abdullah Ali H. Alzahrani
Robotic dentistry (RD) and artificial intelligence (AI) are gradually evolving and may become an integral part of dentistry. The purpose of this study is to assess the perceptions and attitudes of dental practitioners in Saudi Arabia toward the use of RD and AI in dentistry. A national dental survey using a pre-designed and validated perceptions and attitude electronic questionnaire was conducted.
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Analysis of generalized type-II progressively hybrid Lindley-exponential data and its modeling in physics, engineering, and management Aip Adv. (IF 1.6) Pub Date : 2024-04-12 Refah Alotaibi, Hoda Rezk, Ahmed Elshahhat
The life test is guaranteed to end at a predetermined time using a novel type-II generalized progressively hybrid censoring method that is investigated when the test participants’ lifetime model has a two-parameter Lindley-exponential (LndE) distribution. The LndE characteristics are estimated using Bayes and maximum likelihood inference techniques when the suggested censored data are present. By employing
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Modeling and analysis of the triple diffusion unsteady flow of couple stress nanofluid with variable viscosity and distinct thermal sources Aip Adv. (IF 1.6) Pub Date : 2024-04-12 Kaouther Ghachem, Sami Ullah Khan, Imen Safra, Hind Albalawi, Taher Labidi, Lioua Kolsi
Thanks to their optimal thermal characteristics, nanomaterials stand out for their varied applications in heat transfer systems, energy storage, industrial processes, and biomedical research. Recently, scientists explored various dynamic properties in nanofluid flow to develop an even better thermal model. In this context, the phenomenon of triple diffusion in nanofluids constitutes an active area
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Wireless-based portable device heart rate measurement as biomedical devices for stress detection Aip Adv. (IF 1.6) Pub Date : 2024-04-12 C. Bambang Dwi Kuncoro, Adhan Efendi, Win-Jet Luo, Maria Mahardini Sakanti, Muhammad Imam Ammarullah
Stress can increase the heart rate, causing dangerous conditions that cause significant harm and even death. Therefore, managing stress well to control the heart rate is vital. Monitoring stress levels using biomedical devices is essential to prevent further damage to the individual. Regular monitoring facilitates the acquisition of individual stress levels through heart rate information. In this research
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A theoretical study on optical field distribution and absorption of stacked thin films supported by a reflective back layer Aip Adv. (IF 1.6) Pub Date : 2024-04-12 Nguyen Duy Vy, Vinh N. T. Pham, Le Tri Dat
The stacked thin films have recently been of great interest for enhancing the optical and thermal absorption of the system via their specific optical properties depending on the optical wavelength and layer thickness. Here, by using Maxwell’s equation for the electromagnetic fields penetrating thin films, we simulated in detail the absorption of the nanometer-thick thin film of several materials, such
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Characterization on properties of Al7050/TiC/BN hybrid metal matrix composite Aip Adv. (IF 1.6) Pub Date : 2024-04-11 R. Muthukumaran, Ajith Arul Daniel, M. Nithya, A. Parthiban, T. Sathish, Jayant Giri, Hamad A. Al-Lohedan
Aluminum alloy and its allied composites are gaining popularity and find their exclusive application in all industries for more than two decades. Due to their increased usage, Al metal matrix composites were experimented by reinforcing them with variety of particles. The current study attempted the use of titanium carbide (TiC) and boron nitride (BN) as reinforcing materials for the Al7050 alloy through
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Unraveling the molecular interplay of ferroptosis and immune regulation in stroke pathogenesis: A comprehensive bioinformatics analysis Aip Adv. (IF 1.6) Pub Date : 2024-04-11 Yexiao Qin, Hong Jin, Xizhe Sun, Ming Ma, Xiaoning Li, Lanxin Gu, Jiaming Fu, Meng Li, Bin Zhong
Neurological disorders, particularly stroke, pose significant public health challenges, prompting a comprehensive investigation into the intricate interplay between ferroptosis and immune responses. This study aims to uncover the molecular mechanisms of stroke, emphasizing the connection between ferroptosis and immune regulation. Objectives include identifying differentially expressed genes in stroke
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A Caputo fractional derivative dynamic model of hepatitis E with optimal control based on particle swarm optimization Aip Adv. (IF 1.6) Pub Date : 2024-04-11 Jia Li, Xuewen Tan, Wanqin Wu, Xiufen Zou
Hepatitis E, as a zoonotic disease, has been a great challenge to global public health. Therefore, it has important research value and practical significance for the transmission and control of hepatitis E virus (HEV). In the exploration of infectious disease transmission dynamics and optimal control, mathematical models are often applied. Among them, the fractional differential model has become an
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Bayesian and empirical-Bayesian evaluations of the Topp–Leone lifetime model using lower record statistics Aip Adv. (IF 1.6) Pub Date : 2024-04-11 Ohud A. Alqasem, Heba S. Mohammed, Ahmed Elshahhat, H. A. Hussein, Z. F. Jaheen
Record statistics are generally used to measure a process’ stochastic behavior at previously unheard-of values, either upper or lower. It can be obtained or calculated using order statistics from a sample whose size is dictated by the values and order of occurrence of observations. Due to its finite support and bathtub-shaped hazard function, the Topp–Leone (TL) distribution is appealing for reliability
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Precise evaluation of the material constants of [011]-poled mangan-doped 0.32Pb(In1/2Nb1/2)O3-0.39Pb(Mg1/3Nb2/3)O3-0.29PbTiO3 single crystals Aip Adv. (IF 1.6) Pub Date : 2024-04-11 Byungjin Kwon, Seonghun Pyo, Yub Je, Hee-Seon Seo, Sanggoo Lee, Yongrae Roh
Recently, there has been a surge of interest in [011]-poled Mn: PIN-PMN-PT piezoelectric single crystals for high-power transducers. These crystals boast impressive electromechanical coupling coefficients, piezoelectric constants in the transverse mode, and excellent heat resistance due to their high mechanical quality factor. To effectively design transducers using these crystals, understanding their
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Thermoelectric properties of lead-free anti-perovskites X3BN (B = Bi, Sb, X = Mg, Ca, Sr): A theoretical study based on first-principles calculations and machine learning interatomic potential Aip Adv. (IF 1.6) Pub Date : 2024-04-10 Tao Hu, Yanxiao Hu, Wenqiu Shang, Li Li, Chunbao Feng, Ping Zhou, Dengfeng Li
The search for non-toxic and low-cost perovskites with high thermoelectric performance is still a challenge despite low thermal conductivity. The thermoelectric properties of nitride anti-perovskites X3BN (B = Bi, Sb, X = Mg, Ca, Sr) with a cubic structure were investigated using density functional theory and machine learning interatomic potential. The low Debye temperature and thermal conductivity
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Dynamics of a piezoelectric vibration energy harvester with a pseudoelastic SMA spring Aip Adv. (IF 1.6) Pub Date : 2024-04-10 Arthur Adeodato, Abhijeet M. Giri, Piotr Wolszczak, Grzegorz Litak
The development of small-scale and low power consumption devices has been motivating the design of intelligent mechanisms, exhibiting a wide power density spectrum across various external sources. Smart materials come up as an attractive alternative due to their intrinsic multi-coupling between different physical domains. In this context, piezoelectric materials allow conversion of mechanical energy
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Research on the motion characteristics of the opening process of double joint folding wings Aip Adv. (IF 1.6) Pub Date : 2024-04-10 Tiegang Lv, Xiaowen Zhang, Qiao Junfu
The folding wing mechanism is a system developed for the miniaturization of missile wings to facilitate box (cylinder) storage, transportation, and launching, saving the storage and transportation space of the missile and improving the combat capability of the weapon system. In order to solve the stability problem of the dynamic opening process of wings during missile flight, a theoretical model of
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Strong evidence for diffusion of point defects in GaInN/GaN quantum well structures Aip Adv. (IF 1.6) Pub Date : 2024-04-10 R. de Vasconcellos Lourenço, P. Horenburg, P. Henning, H. Bremers, U. Rossow, A. Hangleiter
The reduction of the defect density in quantum wells (QWs) is important to maximize the internal quantum efficiency. We investigate non-radiative recombination in GaInN/GaN single QWs (SQWs) grown on In-free and In-containing so-called underlayers (ULs). The non-radiative lifetime of SQWs increases with increasing UL thickness and decreases exponentially with increasing UL growth temperature. Moreover
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Rotational effect on shock-induced phase transitions of the condensed fluid in the hard-sphere model Aip Adv. (IF 1.6) Pub Date : 2024-04-10 Yue Zheng, Junjun Xu, Ke Tang
The properties of fluid phase transition can be distinctly induced by shock-waves in the hard-sphere model. Typical thermal and dynamic characteristics of the fluid have been described by conditions in the Rankine–Hugoniot (RH) theory based on Euler equations. Due to the strong impact from shock-waves, states of excitation or even phase transition can be detected. However, various factors can influence
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Image-free single-pixel classifier using feature information measurement matrices Aip Adv. (IF 1.6) Pub Date : 2024-04-10 Ziqiang He, Shaosheng Dai
Single-pixel imaging-free (SPIF) technology is a novel object classification method that projects a small set of measurement matrix patterns onto the target and then analyzes the reflected light intensity to achieve imaging-free classification of the target. However, in the existing shallow-learning methods, the information interaction between the measurement matrices and the target is irrelevant.
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Diagnosis of a rotor imbalance in a wind turbine based on support vector machine Aip Adv. (IF 1.6) Pub Date : 2024-04-10 Mingyang Chen, Shanshan Guo, Zuoxia Xing, Komla Agbenyo Folly, Yang Liu, Pengfei Zhang
Rotor imbalances in wind turbines present safety risks and lead to economic losses, and a method to diagnose rotor imbalances is urgently needed. A diagnostic method for rotor imbalances is proposed in this paper. First, a signal reconstruction method is proposed, and a novel index is used to determine the number of components used in signal decomposition in order to effectively address the interference
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Non-contact, portable, and stand-off infrared thermal imager for security scanning applications Aip Adv. (IF 1.6) Pub Date : 2024-04-10 WeeLiam Khor, Yichen Kelly Chen, Michael Roberts, Francesco Ciampa
In this article, we demonstrated the physical application of a portable infrared (IR) security scanning system for the non-contact and stand-off detection of target objects concealed underneath clothing. Such a system combines IR imaging and transfer learning with convolutional neural networks (CNNs) to enhance the detection of weak thermal signals and automate the classification of IR images. A mid-wavelength
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Giant magnetoimpedance effect and spin accumulation in conjugated polymeric networks with inhomogeneity Aip Adv. (IF 1.6) Pub Date : 2024-04-10 Sukhjot Singh, Mallikarjun Rampur, Anjali Chetty, Rajeev Shesha Joshi
The magnetoimpedance effect allows us to estimate the extent of spin dependent scattering in disordered solids. The change in impedance with respect to applied magnetic field manifests through local change in permeability on the surface and it amplifies at defect sites. The local electrical inhomogeneities are expected to aid this effect through spin dependent scattering. The organic conjugated electrical
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Parametric simulations of fractal-fractional non-linear viscoelastic fluid model with finite difference scheme Aip Adv. (IF 1.6) Pub Date : 2024-04-10 Saqib Murtaza, Emad A. A. Ismail, Fuad A. Awwad, Ebenezer Bonyah, Ahmed M. Hassan, Muhammad Saad Khan, Razi Khan, Zubair Ahmad
Fractal-fractional derivatives are more general than the fractional derivative and classical derivative in terms of order. Fractal-fractional derivative is used in those models where the classical continuum hypothesis theory fails. More precisely, these derivative operators are used where the surface or space is discontinuous, e.g., porous medium. Fractal-fractional derivative is considered advance
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NMP limits silver particle size to solve deposited film breakup problems Aip Adv. (IF 1.6) Pub Date : 2024-04-09 Meng Yuan, Xin Jiang, Yitong Liu, Anqing Xu, Xin Tang, Xiaohua Wang, Long Yuan, Yu Duan
Metal based electroreflective devices (MERDs) have gained wide attention in recent years in the fields of smart windows and automotive glass due to their excellent photo-thermal modulation capability in the visible and near-infrared wavelength bands due to their high reflectivity. However, the high porosity due to the island-like growth of silver particles makes the devices susceptible to electrodeposited
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An algorithm to enhance the capability of imaging Thomson scattering Aip Adv. (IF 1.6) Pub Date : 2024-04-09 Yi-fan Liu, Peng Yuan, Tao Tao, Yao-yuan Liu, Xin-yan Li, Jun Li, Jian Zheng
Collective Thomson scattering (TS) is a powerful technique to accurately diagnose the parameters of laser-produced plasmas. However, when the scattering parameter α, which is inverse to the product of electron Debye length and wavenumber of plasma fluctuations, is significantly larger than 1, which of the conditions is easily satisfied in the experiment, the accuracy of electron density measurement
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Collaborative hierarchical scheduling model of interconnected multi-microgrid and ADN considering DR with different strategies Aip Adv. (IF 1.6) Pub Date : 2024-04-09 Yuming Shen, Jiayin Xu, Xuli Wang, Wenzhang Guo, Yuanke Zhou, Peiru Feng, Mengyuan Zhang, Haoran Xu
The demand response (DR) resources of multiple entities have different operation strategies, which makes it difficult to realize the co-optimization. This paper proposes a cooperative hierarchical scheduling optimization model of interconnected multi-microgrid and an active distribution network (ADN) considering DR with different operation strategies. First, the collaborative hierarchical scheduling
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Design of printing ink spectral collection system and research on ink proportion prediction method Aip Adv. (IF 1.6) Pub Date : 2024-04-09 Wenhao Zhang, Xinru Liu, Rui Zhang, Fei Jiang, Junjia He, Shuyang Fang
In spectral-based ink content measurement, improving the accuracy of the spectral collection system and reducing the algorithm complexity of the ink content measurement model are important aspects of research. This study designs a spectral collection system with an M-type Czerny–Turner optical path structure, uses a third-order polynomial fitting method for calibration analysis, collects the spectral
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Surface free energy calculation of the solid–fluid interfaces from molecular simulation Aip Adv. (IF 1.6) Pub Date : 2024-04-09 Aziz Ghoufi
In this work, I present a straightforward approach for computing surface free energy γF based on the assessment of surface internal energy (γU), avoiding the difficulty connected to the determination of the elastic contribution in the case of a solid surface. This methodology has thus been extended to the calculation of γF for the interface between the liquid–vapor phase of water, the solid–vapor interface
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Classification of laser beam profiles using machine learning at the ELI-NP high power laser system Aip Adv. (IF 1.6) Pub Date : 2024-04-09 V. Gaciu, I. Dăncuş, B. Diaconescu, D. G. Ghiţă, E. Sluşanschi, C. M. Ticoş
The high power laser system at Extreme Light Infrastructure—Nuclear Physics has demonstrated 10 PW power shot capability. It can also deliver beams with powers of 1 PW and 100 TW in several different experimental areas that carry out dedicated sets of experiments. An array of diagnostics is deployed to characterize the laser beam spatial profiles and to monitor their evolution during the amplification
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Two-level optimal scheduling of source–storage-load interactive distribution network based on particle swarm optimization algorithm Aip Adv. (IF 1.6) Pub Date : 2024-04-09 Chunhui Liang, Renjie Liu, Xiaoyang Zuo, Jinfa Li, Chenglong Huang
In response to the difficulties of grid integration and consumption of a high proportion of new energy generation, as well as the high pressure on traditional thermal power generation to regulate peak loads, this paper constructs a wind-solar-fire-water complementary power generation system with “dual energy storage” and proposes a two-layer scheduling optimization strategy for this system. The scheduling
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Numerical study on magnetic control of boundary layers in non-Newtonian flows over stretching cylinders using Keller box analysis Aip Adv. (IF 1.6) Pub Date : 2024-04-09 Bilal Ahmed
This article presents an analysis of the magnetic field’s effects on two-dimensional, two-directional, incompressible, and steady third-grade fluid flow over a stretched circular cylinder. A mathematical model describing the behavior of third-grade fluid in the cylindrical coordinate system is developed, accounting for nonlinear differential conditions. To simplify the analysis, appropriate transformations
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A novel method for multiple targets localization based on normalized cross-correlation adaptive variable step-size dynamic template matching Aip Adv. (IF 1.6) Pub Date : 2024-04-09 A. Weiwei Yang, B. Jinsong Peng, C. Xiangning Lu, D. Zhenzhi He, E. Tianchi Chen, F. Lianchao Sheng
The template matching method has been widely utilized in the defect detection of wafer surfaces. However, the traditional matching approaches are limited by illumination, noise, and deformation, which cannot meet the requirements of accuracy and robustness. In this paper, a novel multiple targets localization method, named Normalized Cross-correlation Adaptive Variable Step-Size Dynamic Template (NCC-AVSSDT)
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Design and fabrication of a novel all-quartz resonant pressure sensor with continuously variable section of DETF Aip Adv. (IF 1.6) Pub Date : 2024-04-09 Dongxiang Han, Shenfang Yuan, Congwei Feng, Ting Yang, Jian Yang
This paper reports a novel piezoelectric quartz crystal pressure sensor with a double-ended tuning fork (DETF) resonator. The key design is the resonator beams with a continuously variable section shape. Different from the traditional DETF with straight beams or the one with variable sections with steps, this design can improve sensitivity effectively. Theoretical analysis indicates that the sensitivity
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Study on energy capture characteristics of piezoelectric stack energy harvester for railway track Aip Adv. (IF 1.6) Pub Date : 2024-04-08 Zhaowei Min, Guangdong Sui, Chengwei Hou, Xiaofan Zhang, Xiaobiao Shan, Tao Xie
Railway traffic plays a pivotal role within the current transportation system, with ensuring its safety being of paramount importance. Real-time monitoring of train track health through sensor technology has emerged as a significant approach for achieving this objective. However, a persistent challenge lies in providing cost-effective and stable power to sensors in remote areas. This paper proposes