bluuebunny/crossref_metadata_2025_split huggingface dataset:
Ab initio investigation of structural, elastic, and thermodynamic characteristics of tetragonal XAgO compounds (X = Li, Na, K, Rb)
Authors: Allali Djamel , Amari Rabie , Bouhemadou Abdelmadjid , Boukhari Ammar , Deghfel Bahri , Essaoud Saber Saad , Bin-Omran Saad , Radjai Missoum , Khenata Rabah , Al-Douri Yarub 
Published: September 2023

Abstract
The present research utilizes ab initio computations to examine the thermodynamic, structural, and elastic characteristics of XAgO ternary oxides, where X signifies Li, Na, K, and Rb.The GGA-PBE and GGA-WC functionals were used to calculate the ground-state lattice parameters and atomic position coordinates of the title materials. The calculated results were in good agreement with both experimental measurements and theoretical predictions. This suggests that the GGA-PBE and GGA-WC functionals are accurate for describing the structural properties of the material under study.This study offers computational predictions for the elastic properties of monocrystalline structures and polycrystalline aggregates of XAgO compounds. These predictions encompass various key parameters, including single-crystal elastic constants, Young’s modulus, bulk modulus, Lame coefficients, Poisson’s ratio, shear modulus, and Debye temperature. Additionally, the quasi-harmonic Debye approximation is utilized to explore the temperature-dependent behavior of bulk modulus, Debye temperature, volume thermal expansion coefficient, and isobaric and isochoric heat capacities over an extensive temperature range, while maintaining constant pressures. The results obtained from this model are found to be highly successful in accurately predicting the behavior of these properties.
Comparison of single event effect on cascoded low noise amplifier performance metrics for two different frequencies
Authors: Rajendiran P 
Published: September 2023

Abstract
This manuscript examines the impact of single event effects (SEEs) on the well-known cascoded low noise amplifier (LNA) topology connected with an inter-stage inductor sandwiched between the common source (CS) and common gate transistors for boosting the LNA parameters (i.e., gain, etc). In this article, we have considered that the LNA operates at two different frequencies, such as 10 and 30 GHz, in a radiation-prone environment. The effect of SEEs is analyzed in two ways: (i) non-applying a RF input with dc voltage only, and (ii) applying a RF input with dc bias voltage. The first analysis uses basic integration to evaluate the collected charge (QCollected) for a drain terminal momentary current spike with a suitable time period, and the second analysis estimates the LNA output discontinuity (distortion) using a spectrogram (short-time FFT) to determine the radiation strikes on the cascoded LNA. The collected charge is calculated in the temporal analysis, and the discontinuity of LNA’s RF output is analysed using the spectrogram in the frequency domain analysis. From the temporal and frequency analysis, the LNA that operates at a lower frequency (10 GHz) provides more discontinuity in LNA output (causing more disturbance) than the LNA that operates at a higher frequency (30 GHz).
Unimodal distribution of terahertz emission from single-color filament plasma
Authors: Rizaev G E , Pushkarev D V , Koribut A V , Levus M V , Grudtsyn Y A V , Mokrousova D V , Seleznev L V 
Published: September 2023

Abstract
We study the angular distributions of various spectral components of terahertz radiation generated in an air plasma of a single-color filament with a laser wavelength of 930 nm. It is experimentally shown that at a 20-fold excess over the critical power for self-focusing the distribution of terahertz radiation at all studied frequencies is unimodal. The obtained pattern differs significantly from the angular distribution of terahertz radiation observed in the case of filamentation of pulses with a shorter wavelength.
Two-dimensional MXene Ti3C2 for Efficient Photoacoustic Conversion
Authors: Zhou Kuangyu , Shao Zhihua , Qiao Xueguang 
Published: September 2023

Abstract
Two-dimensional MXene are potential photoacoustic conversion materials due to the excellent light absorption and photothermal conversion efficiencies. In this study, we theoretically analyze and experimentally demonstrate the photoacoustic properties of Ti3C2. High-intensity ultrasonic waves are generated by irradiating Ti3C2 films with 532 nm pulsed laser. By comparison, the signal amplitude of Ti3C2 is about twice as much as that of graphene. We validate the potential of Ti3C2 as an efficient functional material for photoacoustic or laser ultrasonic applications.
Sensing Characteristics of a Three-Ring Grating Slit Micro Ring Resonator
Authors: Zhu Yanjie , Liang Longxue 
Published: September 2023

Abstract
In this paper, a micro ring resonator with slit structure of three-ring grating is proposed to make the refractive index micro ring sensor have higher quality factor and sensitivity. Based on the traditional micro ring resonator, the structure adopts three micro rings and adds grating structure to the rings, which can realize the EIT-Like effect at different wavelengths. Furthermore, the quality factor and sensitivity of the micro ring resonator are improved. The structure is simulated using the finite difference time-domain (FDTD) technique and the influence of device parameters on the structure is investigated. Quality factor was found to be up to 24845, over threefold higher than conventional microring sensors. The sensitivity is 224.2nm/RIU, more than two times higher than the conventional micro ring refractive index.
Research on the Development of Chromatic Aberration Selection Model for Optical Bifocal Glass Lens
Authors: Wu Bowen , Hsueh Boren , Lin Wenchieh , Huang Chouchun , Kao Chihchen 
Published: September 2023

Abstract
This research aims to develop a model for selecting bifocal glass lens based on their formal design, configuration, and optical properties, particularly chromatic aberration. The model optimization integrates Taguchi-Fuzzy theoretical analysis. By utilizing the Fuzzy theory system along with Taguchi L9 orthogonal table, the model achieves high-precision experimental results with a minimal number of designs, leading to the identification of the optimal design combination. The first section of the study explains the motivation behind the research and conducts a literature review to analyze the optical quality parameters of bifocal glass lens. The second section focuses on the analysis of lens optical lateral and longitudinal chromatic aberrations, optimizing the chromatic aberration model through the application of the Taguchi-Fuzzy experimental method. The feasibility of the model is then validated through variance analysis. Finally, the third section provides a summary of the bifocal glass lens selection model, highlighting its contributions to design, practicality, analysis, innovation, and overall advancements in the field.
Design and Experimental Analysis of an Optical Fiber Coupling System for a Ground-based Telescope with Adaptive Optics
Authors: Wang Chaoyan , Ge Jian , Cai Jianqing , Li Lingxiao 
Published: September 2023

Abstract
Astronomy photonics has opened up a new era for the application of astronomical optical instruments. The fiber coupling system serves as the crucial link between the telescope and photonic devices. This paper explores a beam shaping method that utilizes a coupled lens to enhance the efficiency of coupling light into an optical single mode fiber. Compared to directly coupling the telescope beam into the fiber, this approach offers improved coupling efficiency and greater adjustment tolerance. The laboratory-based optical fiber coupling system described in this study comprises an imaging component with an F/50 ratio and a fiber coupling component. Theoretical analysis indicates that optimal coupling efficiency is achieved when the diameter of the focusing spot, limited by diffraction, matches the fiber core size. Any axial error, position error, or tip-tilt error between the lens and the fiber will reduce the coupling efficiency. Experimental results confirm that the coupling system achieves an efficiency of approximately 70%, which is close to the theoretical limit of 78%. These findings underscore the effectiveness of the fiber coupling method.
Analysis of Imaging Characteristics of Wide-field Lobster Eye Lens
Authors: Ma Shizhang , Ouyang Mingzhao , Fu Yuegang , Hu Yuan , Zhang Yuhui , Yang Yuxiang , Wang Shengyu 
Published: September 2023

Abstract
The lobster-eye lens is a reflected type focusing optics. It can be used for backscattering imaging that is a single-sided access technology for homeland security, detection of improvised explosive devices, non-destructive testing, and medical imaging. The aim of this study was to investigate the imaging characteristic of meridional lobster-eye lens with a planar imaging surface. The larger the field of view, the greater the spherical aberration, and the larger the field curvature of the edge field of view. Both spherical aberration and field curvature increase the size of the focal spot, and the images become blurry. Rays with a large angle of grazing incidence have large spherical aberration and curvature. The reflectivity of these rays drops sharply as the energy of photons increases. Therefore, spherical aberration and field curvature have a greater effect on photons with low energy. These conclusions can help improve the design of a lobster-eye lens for wide-field imaging applications.
Numerical Solution for a Fractional Differential Equation Arising In Optics
Authors: Feng Yu , Ma Dexiang 
Published: September 2023

Abstract
A new recursive algorithm (named as Abel-ADM) is given to obtain approximate solution for a class of nonlinear fractional differential equation arising in optics. Abel-ADM is a method that combines the generalized Abel equation with the Adomian decomposition method (ADM). The effectiveness of the method was verified through numerical examples.
Study on the Technique for Wavelength Modulation Spectroscopy with Narrow Band Interference Filter Based External Cavity Diode Laser
Authors: Xiao Xiao , Zhang Jianquan , Zhou Guopeng , Yu Fengqi , Lawrence George N. , Wang Zhibin 
Published: September 2023

Abstract
In this study, an improved tunable external cavity diode laser (ECDL) is proposed. It is on the basis of narrow band interference filter, and its theoretical research is carried out as the light source of tunable diode laser absorption spectrum-wavelength modulation spectrum (TDLAS-WMS) system. The proposed model can use piezoelectric ceramic actuator to change and modulate its output central wavelength so that the laser central wavelength could periodically scan the absorption spectral band of the desired gas. Compared with the tunable monolithic diode laser, the narrow band interference filter based tunable ECDL might be able to accurately sense the type and concentration of a large variety of gases. Therefore, it can be used in the TDLAS-WMS system for high precision gas sensing and is expected to replace the tunable monolithic diode laser.
Full-Stokes Polarization Raman Microscope
Authors: Chen Zeyu , Zhang Chunmin 
Published: September 2023

Abstract
Polarization Raman spectroscopy (PRS) can provide additional information regarding molecular orientation and symmetry compared to Raman spectroscopy, while traditional PRS only records parallel and perpendicular components of Raman scattered light. Recently, a channelled polarization Raman microscope was developed to acquire the linear-Stokes polarization Raman spectra. Since the circular polarization Raman spectra may contain important information related to molecular structure, a full-Stokes polarization Raman microscope (FPRM) is presented in this paper. A polarization modulator consisting of two high order retarder and a linear polarizer is used to modulate the full-Stokes polarization information into frequency domain, and the polarization demodulation is achieved by the Fourier transformation method. Only one camera shot is needed to acquire all polarization components of the Raman scattered light, and the feasibility of FPRM is verified by simulations.
Design of a Redundant 6-DOF Parallel Platform for Mirror Precision Pose Adjustment
Authors: Liang Fengchao , Tan Shuang , Fan Jiankai , Zhang Ai , Lin Zhe , Shi Zhicheng 
Published: September 2023

Abstract
The pose control of 6-DOF parallel mechanism depends on the measurement accuracy of the position of the active driving strut, which affects the pose control accuracy of 6-DOF parallel mechanism. In order to overcome the influence of heavy load large impact force on the measurement accuracy of the active drive strut, a redundant 6-DOF parallel mechanism that separates the measurement struts from the active drive struts was proposed. The fixed platform and the moving platform are connected by six identical active drive struts and six redundant measurement struts. The active driving strut is an active motion unit used to achieve various pose movements of the parallel mechanism, and the follower redundant measurement strut is a precision measurement unit, and does not constrain any DOF of the platform. Only the follower accurately measures the distance between the upper and lower hinge points of the redundant hinges. The accurate position and pose of the 6-DOF parallel mechanism are obtained by using the forward kinematics solution. The controller is used to implement the pose closed-loop control algorithm to achieve precise pose control. The design of this redundant 6-DOF parallel mechanism improves the movement accuracy of the parallel mechanism under heavy load. It can be applied to the precision adjustment of the primary mirror or secondary mirror under heavy load in large aperture optics, and has strong engineering application value.
Field Extended Birefringent Static Doppler Wind Imaging Interferometer
Authors: Yan Tingyu , Shu Lingfeng , Luo Wenyi , Han Chao , Zhang Chunmin 
Published: September 2023

Abstract
According to the requirements for wide field of view and high resolution in wind imaging detection, the principle of a novel field extended birefringent wind imaging interferometer is proposed. Based on the principle of birefringent polarization wind imaging interferometer, the new optical system scheme of the field extended birefringent static Doppler wind imaging interferometer is designed, which overcomes the limitation of the field of view in the original birefringent polarization wind imaging interferometer. Compared with the original scheme, the new scheme eliminates the cross-field phase change between the top and bottom fields, and the available field of view of the instrument is no longer limited. The Jones matrix model are used to simulate to prove the correctness of the principal scheme of the field extended birefringent wind imaging interferometer.
Path optimizing of UAV inspection for 500kV AC transmission line cup-tower based on ant colony algorithm
Authors: Guo Hao , Liu Shushan , Xu Li , Wang Zhigang , Li Hui , Chen Bin 
Published: September 2023

Abstract
To ensure unmanned aerial vehicles (UAVs) complete the inspection task of a high-voltage transmission line safely and effectively, it is necessary to consider the interference of a complicated electromagnetic field near a high-voltage transmission line and determine a reasonable inspection distance and path of the UAV. Taking the 500kV EHV AC power line as an instance, firstly, the three-dimensional model of the 500kV ZV1 cup-tower is built, and the finite element method (FEM) is used for computing the electric field and magnetic field of the UAV exterior. According to inspection specifications, the electromagnetic field protection threshold of the UAV is determined, and then the safety area between UAV and the split conductor is determined to be equal to 1.5 m. Combined with the UAV shooting field of view and safety distance, the spatial positions of UAV hovering shooting points are selected to ensure that UAV flies in a safe area. Finally, the path of UAV traversing hovering shooting points is optimized by the ant colony algorithm (ACO), and the optimal path distance is 109.4 m.
Safety Simulation Analysis of Supporting Structure for Live Working Used Insulation Platform on 10KV Lines
Authors: Feng Yu , Wu Shaolei , Wu Kai , Wang Zhijian , Wang Wei 
Published: September 2023

Abstract
The insulation platform mainly comprises insulation tubes, carrying personnel for live working at high altitudes. The structure is prone to deformation, fracture, and vibration under stress. The model of supporting structure is established by Solidworks software. Ansys Workbench is used for static and modal analysis of supporting structures. The results show that the connection between the supporting and front insulation tubes is weak with the maximum stress, and the maximum deformation and vibration occur at the supporting and main platforms. The change of the angle between the supporting insulation tube and the front insulation tube and the angle between the two supporting insulation tubes will cause the maximum stress of the structure to change. The optimal range of the angle is determined finally. The results can be used for the structural optimization of the insulation platform, which is significant for improving its safety performance.
MPC-based energy management strategy for a substation PEDF System
Authors: Zhao Chongjuan , Wang Chang , Jiang Jianjie , Lei Yusong , Zhu Sicheng , Wei Shutian , Zhan Ruifeng , Hu Yuying , Ke Ji 
Published: September 2023

Abstract
According to the optimal scheduling and balanced utilization of power generation units, energy storage, and flexible loads in the PEDF(photovoltaic, energy storage, direct current and flexibility) system of a substation, and realizing stable operation with different time scales and operation modes, this paper proposes a hierarchical control framework, which includes energy management layer, power conversion layer, stability control layer, and an MPC-based energy management strategy based control. Among them, the energy management system uses the prediction of the absorbed power and current of the distributed generation units and loads, and based on the technology of model predictive control to generate the optimal reference power and decision variables for the system to decide the on/off of the system’s dispatchable generation unit and the operation mode of photovoltaic and battery. Finally, the proposed control architecture and strategy are validated by a substation PEDF system.
Economic Operation of Multi-terminal Interlinking Microgrid Based on the Decentralized Protocol
Authors: Wang Zeyi , Zhang Weihua , Xu Weijin , Zhang Jiajun , Wang Panbao 
Published: September 2023

Abstract
This paper develops a decentralized control strategy based on an interlinking converter to realize the global economic optimal operation of a multi-terminal interlinking microgrid (MG). The control objective is to minimize the total generation cost (TGC) of the interlinking microgrid system. The proposed control is composed of local and global controllers, which deal with sub-MG and interlinking MG systems respectively. The local controller regulates the incremental cost (IC) value matching in the sub-microgrid based on the nonlinear dynamic droop control with equal IC to achieve the optimal load power distribution in the local DG units. The global controller controls BIC through the bus voltage signal to match the IC value of the entire interlinking MG system in a decentralized form, which significantly improves the reliability and scalability of the system and achieves the global optimal economic optimal operation under the condition of meeting the power demand and production constraints. The feasibility and superiority of the proposed controller are verified by PLECS under various test cases.
Correlation and K-means clustering based small current ground fault line selection algorithm
Authors: Gao Wenli , Xi Dongmin , Zheng Linan 
Published: September 2023

Abstract
The existing small current grounding line selecting technique has consequences by transition resistance, fault closure angles, and the fault location, and there is a problem of low selection accuracy, which is addressed by proposing a line-choosing algorithm that employs a combination of transient zero-sequential current (TZSC) waveform correlation and K-means clustering. First, to obtain the correlation coefficient matrix, the correlation analysis is performed for each line of the zero-sequence currents transient measurement values; second, to address the issue of the difficulties in manually setting the threshold, we apply the K-mean cluster analysis algorithm to group the row vectors of the correlation coefficients matrices; and finally, we output the label of the cluster to realize the fault line selection. Simulation and real-world fault data validate the method, showing that it is independent of transition resistance, fault closure angles, and fault location. It can achieve precise and dependable line selectivity.
Analysis of Partial Discharge Fault Diagnosis Technology for High Voltage Switch Cabinet
Authors: Liu Jiaxin , Yu Hao , Mo Zhongyue 
Published: September 2023

Abstract
In order to enhance the security and reliability of high-voltage switch cabinet operation, the diagnosis of internal discharge defects in high-voltage switch cabinet equipment is analyzed in this paper. Firstly, a variety of partial discharge live detection technologies such as three-dimensional voiceprint monitoring technology and three-dimensional ultraviolet technology for partial discharge are studied. Then, a variety of partial discharge live detection technologies are constructed. Finally, the data fusion of the relevant detection data is carried out, and the monitoring results of the equipment’s running state are analyzed. The analysis results show that the data sensitivity and specificity of creepage, non-breakdown discharge, and breakdown discharge at different output values in the application of various partial discharge detection technologies have obvious effects. It is believed that the technology constructed in this study can improve detection accuracy and equipment safety. It provides important parameters and a basis for the maintenance of high-voltage switch cabinets. It is of extremely good importance to take partial live detection measures for the operating switch cabinet and provides a reference for field application.