bluuebunny/crossref_metadata_2025_split huggingface dataset:
In situ plasma cleaning of large-aperture optical components in ICF
Authors: Li Yuhai , Bai Qingshun , Guan Yuheng , Zhang Peng , Shen Rongqi , Lu Lihua , Liu Hao , Yuan Xiaodong , Miao Xinxiang , Han Wei , Yao Caizhen 
Published: February 2022

Abstract
The organic contamination damage of large-aperture optical components limits laser energy improvement of inertial confinement fusion (ICF). In situ cleaning of large-aperture optical components via low-pressure plasma is expected to remove organic contaminants from the optical surface. Herein, low-pressure air plasma equipment was proposed and used on surfaces of SiO2 sol–gel antireflection (AR) films in situ by conducting experiments. Its electrical discharge parameters were investigated and optimized during plasma cleaning. Plasma diffusion characteristics and homogeneity in large-aperture windows were analyzed by optical emission spectroscopy. Dramatic degradation in the optical properties of components was observed after organic contamination for 5 h. Transmittance, laser-induced damage threshold and surface morphology observation results demonstrated that low-pressure air plasma removed the organic contaminants from the surface of sol–gel AR films without causing damage and metal contamination. After plasma cleaning, the hydrophilicity of the films increased significantly due to the increase in the polar components of surface free energy. The mechanism of plasma cleaning organic contaminants was confirmed by x-ray photoelectron spectroscopy measurements. These salient results provide a new alternative method for removing organic contaminants in situ from large-aperture optical components and a foundation for improving the energy output of the ICF system.
The Inverse Eigenvalue Problem for a Class of Sub-periodic Generalized Jacobi Matrices
Authors: Wang Qingqing , Jiao Lixin 
Published: February 2022

Abstract
The inverse eigenvalue problem of matrix has practical significance in engineering and scientific calculation. In this paper, the inverse eigenvalue problem of sub-periodic generalized Jacobi matrices is studied. Two eigenvalues and corresponding eigenvectors are used to construct generalized Jacobi matrices. The existence and uniqueness conditions of the solution are discussed, the solution algorithm for the inverse problem is given, and the effectiveness of the algorithm is verified by a numerical example.
Research on decoupling technology of fast mirror platform based on state space feedback
Authors: Yu Yang , Zhang Honggang , Gao Junke , Zuo Shouyin , Shi Pengjie 
Published: February 2022

Abstract
Aiming at the influence of the nonlinearity of the motor of the fast mirror platform mechanism and the complex coupling between the platform azimuth and pitch frames on the fast mirror mechanism, a decoupling control technology based on state space feedback is proposed in this paper. Firstly, according to the dynamic model of the azimuth and pitch frame of the fast mirror platform, the state space equation is established, and the state space variables of the system are obtained. The constructed feedback system is connected in series with the original system to obtain a pseudo linear system, so that the original coupled nonlinear multi output system is transformed into two linear decoupled single input single output subsystems, In order to eliminate the complex coupling of the azimuth and pitch frame of the fast mirror platform mechanism. Finally, the system simulation platform is established in Matlab/Simulink. The results show that the decoupling technology of fast mirror platform based on state space feedback designed in this paper can effectively reduce the coupling between platform azimuth and pitch frames and improve the stability accuracy of the platform.
Detection Method of Distribution Transformer Based on Intelligent Switching Line Switch
Authors: Fang Jian , Zhang Min , Mo Wenxiong , Huang Bai , He Jiaxing , Lin Xiang 
Published: February 2022

Abstract
Automatic and intelligent detection of distribution transformer is an important condition to ensure distribution network zero defect operation. The traditional distribution transformer quality detection system has low integration and automation, and a single function mode, which cannot meet the intelligent detection under different test scenarios. This paper introduces the basic principle of intelligent switching line, and develop a special automatic switching device according to the actual detection process. On this basis, an intelligent switching line switching device is designed according to the test requirements of distribution transformer. Finally, the actual test results show that the proposed distribution transformer detection method based on intelligent switching line switch can significantly reduce the detection time and improve the detection efficiency of distribution transformer.
Design and experimental analysis of UHF sensor spiral antenna for partial discharge detection of distribution network switchgear
Authors: Wu HouFeng , Wu HanRong , Li Ding 
Published: February 2022

Abstract
The ultra high frequency (UHF) sensor antenna for detecting partial discharge (PD) in distribution network switchgear is studied. Because of the long period of insulation deterioration in the switchgear, more attention is paid to the middle and later stage of insulation deterioration, and the frequency of PD signal that needs to be paid attention to is wider. Among the commonly used UHF antennas, Archimedes spiral antenna has a wider working frequency band and excellent low-frequency working characteristics, Therefore, Archimedes spiral antennas of UHF Sensors with different outer diameters are designed by using ANSYS HFSS. The influence of the outer diameter of Archimedes spiral antenna on the S11 parameters of Archimedes spiral antenna is studied, and the partial discharge signal acquisition experiments are carried out. The results show that the partial discharge characteristic signals collected by Archimedes spiral antenna with different outer diameters are different. This provides a theoretical basis for the design of UHF sensor antenna used in switch cabinet.
Fuzzy PID Control of Nonlinear Vibration Isolator with Parallel Electromagnetic Negative Stiffness
Authors: Xie Yingjiang , Niu Fu , Meng Lingshuai , Zhao Wanzhuo , Sun Jinggong 
Published: February 2022

Abstract
A fuzzy PID control strategy for quasi-zero stiffness (QZS) isolator which connects the pneumatic spring (PS) and the electromagnetic negative stiffness mechanism (ENSM) in parallel to suppress low-frequency vibration is proposed in this paper. First, the restoring force of PS and the electromagnetic force of the ENSM are derived. Secondly, the static analysis of the isolation system is carried out, and the analytical expressions of stiffness and restoring force of the vibration isolation system is obtained. The possibility of the vibration isolator reaching the QZS state is explained. Then, to obtain a better isolation effect, the optimal current of the coil is found according to the designed fuzzy PID control strategy. Finally, the simulation result shows that the isolation frequency band of the isolation system under fuzzy PID control and PID control is widened, and the vibration isolation performance under fuzzy PID control reaches more than 85% under different excitation frequencies. Control effect and vibration isolation performance under fuzzy PID control are better.
Application of model-free adaptive temperature control in medium frequency induction heating
Authors: Li Demin , Qin Qingliang , Yang Xiaoqian 
Published: February 2022

Abstract
Induction heating has a series of advantages such as high heating efficiency, low energy consumption, and environmental protection. It is widely used in the heat treatment of metal workpieces. Only when the temperature of heat treatment meets the process requirements can the quality of workpiece be guaranteed, so the temperature control algorithm is very important. The heat treatment requirements of thick wall pipeline are more stringent than those of conventional workpieces, in order to better control the heat treatment temperature, a model-free adaptive temperature control algorithm based on data-driven is proposed. The principle and rationality of the algorithm were analyzed, and the previous process data were analyzed and fitted. Then the controller was designed and tested in the field of thick-wall pipe heat treatment. The results show that this method can improve the accuracy of temperature control, enhance the uniformity of temperature distribution, and meet the requirements of the production process.
Modelling and Simulation of Vehicle ESP System Based on CarSim and Simulink
Authors: Jiang Nanyu , Qiu Runqi 
Published: February 2022

Abstract
In this paper, the simulation of the vehicle ESP system is carried out, and the linear two-degree-of-freedom dynamic reference model of the vehicle is established in MATLAB/Simulink. Combined with the method of direct yaw moment control, the yaw rate and the yaw angle are selected as the control variables. Based on the fuzzy PID control theory, the control strategy of the ESP system is designed to calculate the additional yaw moment required when the vehicle deviates from the desired trajectory. In order to verify the effectiveness of the ESP system designed in this paper, the vehicle dynamics model in CarSim software is used to build a joint simulation platform of CarSim and Simulink, and the model is tested at a speed of 120 km/h on a double lane change road with low adhesion rate. The simulation results show that the designed controller can significantly improve the manoeuvrability and stability of the vehicle.
Research on Single-phase Power Supply in Short-circuit Test of Transformer on Magnetic-force Coupling Field
Authors: Luo Xiaoxiao , Wang Qian , Xiao Qianbo , Sheng Zhiping , Yan Yangtian 
Published: February 2022

Abstract
The short-circuit test is a test of the comprehensive technical ability of transformer manufacturing. The three-phase power supply is usually used for short-circuit test of transformer. To investigate the feasibility of using a single-phase power supply in the short-circuit test of transformer, in this paper, we modeled a 200 kVA power transformer in three dimensions, using the finite element method to calculate the short-circuit current and short-circuit electromagnetic force of the windings under different excitation modes when the three-phase short-circuit occurs in the low-voltage windings. Analyze and compare the short-circuit current and short-circuit electromagnetic force distribution characteristics of windings under different working conditions. The results show that when the three-phase short-circuit condition occurred in the low-voltage windings, regardless of the three-phase excitation or single-phase excitation exerted on the high-voltage windings, the short-circuit current and the short-circuit electromagnetic force of the voltage zero-crossing closing phase is basically the same. This proves that a single-phase power supply can be used instead of a three-phase power supply for short-circuit tests. the analysis result has certain reference significance for improving the short-circuit test of transformer.
Lightweight target shooting image analysis device based on Raspberry Pi
Authors: Lu Siyuan 
Published: February 2022

Abstract
This paper shows a lightweight target image analysis device using Raspberry Pi as the master control, which contains the processing and data analysis of the whole target image, making it easier for the public to perform shooting analysis. System uses Raspberry Pi 4b as the main control, python as the core language, the whole target surface processing is divided into five parts: target ring analysis, bullet point analysis, data processing, data visualization and user interface. The whole system is low-priced, convenient and lightweight, and can be connected to any screen to display the whole shooting process and human-computer interaction. In the test, the system shows excellent recognition accuracy and speed, flexible and simple, and multiple interfaces make the program expansion very accessible. In the subsequent development, it can be combined with deep learning to pool multi-dimensional shooting data as a way to filter out the best shooting groups for subsequent training.
Thermal Management of Multi Core Processor Using U Configured Parallel Microchannel Cooling System
Authors: Mathiyazhagan S , Sirisha Maganti Lakshmi 
Published: February 2022

Abstract
Thriving technologies in the electronics industry demands effective cooling systems for proper thermal management of the devices. To propose an effective cooling system, real-time challenges need to be taken into examination. One of the challenges is the non-uniform heat load emitted by the device. In this paper, a multicore processor has mimicked for the heat load and examined with U configured parallel microchannel cooling system (PMCS) for its capacity to cool the processor effectively. A detailed numerical examination has been conceded out by mimicking the AMD Ryzen-7 octa-core processor for its size, shape and heat load. To make it convenient for applying non-uniform heat load, the shape of the PMCS is divided into 4*4 array of a total of 16 heaters. The present has witnessed that, there is an uneven distribution of fluid flow across the channels. The initial channels do get more quantity of fluid whereas the end channels do get a very less quantity of fluid. Why because of the flow maldistribution, it formed the hot spots (high-temperature zones), which will be further intensified due to the non-uniform heat load emitted by the processor. It perceived from the present numerical analysis, there is a formation of hotspots not only due to the random location of active cores but also due to the flow maldistribution across the channels. The flow arrangement of U configuration having worse flow distribution among other existing configuration. The present work conclusively demonstrates that high maldistribution leads towards dropping the uniformity of cooling. But the existing maldistribution can be effectively exploited to tackle the non-uniform heat load released by the processor when the active core location falls in the place of initial channels.
Recent perspectives and outlook of advances in technologies of solar chimney power plant
Authors: Mamgain Sarthak , Aggarwal Shubham , Sharma Meeta , Kumar Shukla Anoop 
Published: February 2022

Abstract
Abstract Solar chimney technology is a new generative technology that generates electricity from the direct incident solar radiation from the sun. It is a low-temperature operating solar thermal system that generates power on the basis of three technologies (chimney/draft technology, wind turbine technology, and greenhouse effect technology). It consists of three fundamental parts: turbine, vertical chimney of decent height and a collector made up of glass panes to absorb the radiations from the sun. Effective use of this technique can generate electricity in abundance and can operate twenty-four hours nonstop annually and can solve the electricity shortage issue in a country like India where the sunlight radiations are immense in intensity and stretch to the major parts of the country. Since its inception, solar chimney technology has seen prosperous advancement but has not witnessed full-scale utilization because of various techno-economic and environmental aspects. This study discusses the critical review of the solar updraft/chimney technology in various parts of the world and emphasizes its important aspects.
Study of dissipative MHD oscillatory unsteady free convective flow in a vertical channel occupied with the porous material in the presence of heat source effect and thermal radiation
Authors: Sharma Tarun , Sharma Pooja , Kumar Navin 
Published: February 2022

Abstract
The analytical study of MHD oscillatory, unsteady, natural convective viscous incompressible dissipative flow through vertical channel filled with porous medium in the presence of heat source effect and thermal radiation have been discussed. The time-dependent equations of flow scheme such as the equation of fluid motion and heat transfer are derived and solved by a suitable analytical method. The MATLAB software is used to plot the figures and confer the significance of flow parameters on the velocity and temperature field of the flow scheme. In this analysis, it is found that the magnetic field is the main key parameter for optimizing fluid velocity, and this result is helpful for various industries and biomedical fields.
Designing of Parabolic Trough Collector using Plane Mirrors
Authors: Lamba Mayank , Das Subhra 
Published: February 2022

Abstract
Parabolic trough collectors are used for concentrating solar radiation along the focal line. These collectors are commercially used for power generation. Approximately thirty-seven percent of the total cost is attributed to the solar field. In order to increase the economic viability of solar thermal power plants, there is a need to reduce the cost of solar thermal collectors. In this paper, an attempt has been made to reduce the cost of parabolic trough collectors by fabricating them using plane mirrors. In this endeavor, all factors which affect the surface area of the collector have been identified and the impact of rim angle on the surface area of the collector has been studied. It has been observed that surface area decreases sharply with an increase in rim angle from 20-60 and beyond this value, there is a negligible increase in surface area. Thus, a parabolic trough with aperture width 0.5m, length 0.95m, and rim angle of 96 has been considered for designing a parabolic trough collector using plane mirrors.
It has been observed that the use of plane mirrors in place of curved mirrors significantly reduces the cost of manufacturing by 83.33 percent and will give a major boost to the large-scale installation of solar thermal power plants.
Analysing the Institutional building for Solar Radiation and Photovoltaic Energy using AutoDesk-Revit
Authors: Kumar Mukul , Rawat Paritosh , Maurya Amit , Kumar Ravinder , Bharadwaj Ujjwal , Duggal Prakhar 
Published: February 2022

Abstract
Unconventional sources of energy like solar are not only green but sustainable too. Adopting sustainable sources of energy is a futuristic approach. Working in similar directions in current research, paper authors analyzed and modeled various aspects of an institutional building for solar energy suitability and efficiency by using Autodesk Revit software solar Plugin 2021. The various aspects of solar analysis such as sun path, PV potential and solar radiation value are observed and recorded. After ranging the different criteria like PV surface coverage and PV efficiency the mean energy cost tends to be reduced. Authors observed that the energy cost got reduced to 18.8$ from 24.3$.
Energy Sustainable House: A Case study and validation through Revit
Authors: Malik Arjun , Kumar Ravinder , Gupta Rhythm , Vikal Varun , Minhan  , Bhardwaj Ujjwal 
Published: February 2022

Abstract
Reducing carbon footprints and adopting green energy sources is the need of modern time. Green sources of energy need to find preference over traditional sources. Unconventional sources of energy like solar, wind are alternatives of traditional energy sources. Lack of awareness, high initial investment and lack of government incentive are few challenges in adoption of green sources of energy in housing sector, especially in developing economies. Construction, design and aesthetics of traditional residential building have a significant effect on energy consumption and environment. Town planners, private housing developers and individual house owners have to become aware and adopt the non-traditional sources of energy like solar energy for meeting their daily need of energy. An energy sustainable house has minimum dependency on traditional sources of energy like coal based thermal power plants. For moving a step closer to energy sustainable building, in this research paper authors have studied the design, energy consumption and transformation of energy dependencies on roof top solar plant of a residential building by situation actor process & learning action performance (SAP-LAP) methodology. Further authors tried to validate the observations and findings of study by energy balance analysis of the same residential building by Autodesk Revit software. Studying the economical aspect of current case authors observed that the case house got 60% saving in monthly electricity bill after installing rooftop solar power plant and payback period of total investment on solar power plant is 6.5 to 7 years only.
The Analytical Method of the Mechanics Problem Involving a Hyperelliptic Integral
Authors: Zhu Ping , Lu Yufa 
Published: February 2022

Abstract
It is extremely difficult to obtain the analytical solution of some mechanical problems related to elliptic integrals. The motion of a small ball that rolls without sliding on a smooth hemisphere is a typical hyperelliptic integral problem of this kind. By utilizing elliptic integration theory and operational skills, we give the analytical method of the solution of the motion law of the small ball. At the same time, we exhibit the motion characteristic of the small ball.
Discussion on Fast Calibration Method of Coordinate Measuring Machine
Authors: Chen Long , Ren Tingting , Tao Lei , Xiong Jun , Gu Chunyan 
Published: February 2022

Abstract
This article presents a novel design of a device with simple structure, convenient operation and stable performance for fast calibration of coordinate measuring machines (CMMs). The purpose of the design is aiming at the solving the problems of long timeconsuming, high cost and high requirements for calibration personnel during the traditional calibration process of CMMs. The technical specifications of the designed calibration device complies with ISO 10360-2-2009 Geometrical Product Specifications (GPS)-Acceptance and reverification tests for coordinate measuring machines (CMM)-Part 2: CMMs for measuring linear dimension and ISO 10360-5-2020 Geometrical Product Specifications (GPS)-Acceptance and reverification tests for coordinate measuring machines (CMM)-Part 5: Coordinate measuring machines (CMMs) using single and multiple stylus contacting probing systems using discrete point and/or scanning measuring mode. The device can complete the calibration of the CMMs quickly, obtain the size error and probing error of the CMM in a short time, and provide data support for users to determine whether the CMM meets the application requirements.
Sub-grain Boundary Mobility of 6XXX Alloys during Annealing
Authors: Wang Xiaoguo , Liu Fangzhen , Li Yifeng , Nagaumi Hiromi , Qin Jian 
Published: February 2022

AbstractIn this paper, 6061 aluminum alloy and a new type of dispersion-strengthened 6XXX aluminum alloy (named WQ) were compressed to a true strain of 1.2 at a strain rate of 0.1/s at 300/400/500°C and then annealed at different temperatures. The microstructure evolution of both heat treated alloys were characterized by EBSD. The results showed that during the annealing process of the two deformed alloys, the sub-grain size did not increase significantly. Due to the pinning effect of the dispersoids in WQ alloy, the sub-grain size of WQ was smaller than that of 6061 alloy. Under the same deformation conditions and annealing process, the deformation stored energy of WQ alloy was higher than that of 6061 alloy. The deformation stored energy of 6061 compressed alloy was more sensitive to the annealing temperature. Combining theoretical formulas and EBSD data, the sub-grain boundary migration rate curves of 6061 and WQ deformed alloys during the annealing process were obtained, which could provide a theoretical basis for the future study of the sub-grain growth process of multi-element aluminum alloys.