Measurement Science Review最新文献_第9页

Eddy Current Microsensor and RBF Neural Networks for Detection and Characterization of Small Surface Defects 涡流微传感器与RBF神经网络用于表面小缺陷的检测与表征

IF 0.9 4区工程技术

Measurement Science Review Pub Date : 2022-04-22 DOI: 10.2478/msr-2022-0015

Chifaa ABER, Azzedine Hamid, M. Elchikh, T. Lebey

{"title":"Eddy Current Microsensor and RBF Neural Networks for Detection and Characterization of Small Surface Defects","authors":"Chifaa ABER, Azzedine Hamid, M. Elchikh, T. Lebey","doi":"10.2478/msr-2022-0015","DOIUrl":"https://doi.org/10.2478/msr-2022-0015","url":null,"abstract":"Abstract The growing complexity of industrial processes and manufactured parts, the growing need for safety in service and the desire to optimize the life of parts, require the implementation of increasingly complex quality assessments. Among the various anomalies to consider, sub-millimeter surface defects must be the subject of particular care. These defects are extremely dangerous as they are often the starting point for larger defects such as fatigue cracks, which can lead to the destruction of the parts. Penetrant testing is now widely used for this type of defect, due to its good performance. Nevertheless, it should be abandoned eventually due to environmental standards. Among the possible alternatives, the use of eddy currents (EC) for conductive materials is a reliable, fast, and inexpensive alternative. The study concerns the design and modeling of eddy current probe structures comprising micro-sensors for non-destructive testing. The moving band finite element method is implemented for this purpose to take into account the movement of the sensor, experimental validations were conducted on a nickel-based alloy specimen. The real and imaginary parts of the impedance at every position of the sensor computed by experiments and simulations were in good agreement. The crack detection quality was quantified and the geometric characteristics of the defects were estimated using RBF NN (Radial Basis Function Neural Networks) that were designed and implemented on the acquired signals.","PeriodicalId":49848,"journal":{"name":"Measurement Science Review","volume":"22 1","pages":"112 - 121"},"PeriodicalIF":0.9,"publicationDate":"2022-04-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43784245","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Development of Modified Blum-Blum-Shub Pseudorandom Sequence Generator and its Use in Education 改进的Blum-Blum-Shub伪随机序列发生器的研制及其在教育中的应用

IF 0.9 4区工程技术

Measurement Science Review Pub Date : 2022-04-22 DOI: 10.2478/msr-2022-0018

Shanshan Yu, Przystupa Krzysztof, Lingyu Yan, V. Maksymovych, Roman Stakhiv, Àndrii Malohlovets, O. Kochan

{"title":"Development of Modified Blum-Blum-Shub Pseudorandom Sequence Generator and its Use in Education","authors":"Shanshan Yu, Przystupa Krzysztof, Lingyu Yan, V. Maksymovych, Roman Stakhiv, Àndrii Malohlovets, O. Kochan","doi":"10.2478/msr-2022-0018","DOIUrl":"https://doi.org/10.2478/msr-2022-0018","url":null,"abstract":"Abstract In information security systems, the algorithm of the Blum-Blum-Shub (BBS) generator, which is based on the use of a one-way function and is a cryptographically secure pseudorandom number generator, became widespread. In this paper, the problem of the analysis of modified algorithms of the BBS generator operation is considered to improve their statistical characteristics, namely, the sequence repetition period. It has been established that in order to improve the characteristics of the classic BBS algorithm, it is necessary to systematize approaches to change the recurrent equation itself, the relationship between the current and the previous members of the sequence. For this purpose, a generalized unified model of the modification of the classical BBS algorithm is derived. The repetition period with computational complexity were analyzed for classical algorithm and 80 proposed modifications. A gain in statistical characteristics is improved with slight increase in the required computing power of the system. The proposed modified BBS pseudorandom sequence generator can be used in training of students when teaching cryptographic stability of information security systems. The study of this generator combines the knowledge of students acquired in both digital electronics and mathematics.","PeriodicalId":49848,"journal":{"name":"Measurement Science Review","volume":"22 1","pages":"143 - 151"},"PeriodicalIF":0.9,"publicationDate":"2022-04-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41605358","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Development of a Temperature and Heat Flux Measurement System Based on Microcontroller and its Application in Ophthalmology 基于单片机的温度和热流密度测量系统的研制及其在眼科中的应用

IF 0.9 4区工程技术

Measurement Science Review Pub Date : 2022-03-12 DOI: 10.2478/msr-2022-0009

Chunzhi Wang, Hongzhe Jiao, L. Anatychuk, N. Pasyechnikova, V. Naumenko, O. Zadorozhnyy, L. Vikhor, R. Kobylianskyi, R. Fedoriv, O. Kochan

引用次数: 2

Design and Testing of Wireless Motion Gauges for Two Collaborative Robot Arms 两协同机器人手臂无线运动测量仪的设计与测试

IF 0.9 4区工程技术

Measurement Science Review Pub Date : 2022-03-12 DOI: 10.2478/msr-2022-0011

Yongsik Kim, N. Dagalakis, J. Marvel, G. Cheok

引用次数: 1

A Virtual Measurement Method of the Transmission Error Based on Point Clouds of the Gear 基于齿轮点云的传动误差虚拟测量方法

IF 0.9 4区工程技术

Measurement Science Review Pub Date : 2022-03-12 DOI: 10.2478/msr-2022-0012

Bo Yu, Han-Chuan Kou, Zhaoyao Shi, Yanqiang Sun

引用次数: 5

Analysis of NMR Signal for Static Magnetic Field Standard 静态磁场标准核磁共振信号分析

IF 0.9 4区工程技术

Measurement Science Review Pub Date : 2022-03-12 DOI: 10.2478/msr-2022-0010

P. Andris, T. Dermek, D. Gogola, J. Pribil, I. Frollo

引用次数: 1

Theoretical and Experimental Research on Spatial Performances of the Long-slit Streak Tube 长缝条纹管空间性能的理论和实验研究

IF 0.9 4区工程技术

Measurement Science Review Pub Date : 2022-03-12 DOI: 10.2478/msr-2022-0007

L. Tian, Lingbin Shen, Yanhua Xue, Lin Chen, Lili Li, Ping Chen, Jinshou Tian, Wei Zhao

{"title":"Theoretical and Experimental Research on Spatial Performances of the Long-slit Streak Tube","authors":"L. Tian, Lingbin Shen, Yanhua Xue, Lin Chen, Lili Li, Ping Chen, Jinshou Tian, Wei Zhao","doi":"10.2478/msr-2022-0007","DOIUrl":"https://doi.org/10.2478/msr-2022-0007","url":null,"abstract":"Abstract The streak tubes are widely used in National Ignition Facility (NIF), Inertial Confinement Fusion (ICF), and streak tube imaging lidar (STIL) as radiation or imaging detectors. The spatial resolution and effective photocathode area of the streak tube are strongly dependent on its operating and geometry parameters (electron optical structure and applied voltage). Studies about this dependence do not cover the full range of the parameters. In this paper, 3-D models are developed in Computer Simulation Technology Particle Studio (CST-PS) to comprehensively calculate the spatial resolution for various parameters. Monte Carlo Sampling method (M-C method) and spatial modulation transfer function method (SMTF) are employed in our simulation. Simulated results of the optimized spatial resolution are validated by the experimental data. Finally, the radii of the photocathode (Rc) and phosphor screen (Rs) are optimized. Geometry parameters of Rc=60 mm and Rs=80 mm are proposed to optimize the streak tube performances. Simulation and experimental results show that the spatial resolution and effective photocathode area of this streak tube are expected to reach 16 lp/mm and 30 mm-length while the voltage between cathode and grid (Ucg) is 150 V.","PeriodicalId":49848,"journal":{"name":"Measurement Science Review","volume":"22 1","pages":"58 - 64"},"PeriodicalIF":0.9,"publicationDate":"2022-03-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48732426","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Studying the Thermal Influence on the Vibration of Rotating Blades 热对旋转叶片振动影响的研究

IF 0.9 4区工程技术

Measurement Science Review Pub Date : 2022-03-12 DOI: 10.2478/msr-2022-0008

A. F. Abbas, Adawiya Ali Hamzah

{"title":"Studying the Thermal Influence on the Vibration of Rotating Blades","authors":"A. F. Abbas, Adawiya Ali Hamzah","doi":"10.2478/msr-2022-0008","DOIUrl":"https://doi.org/10.2478/msr-2022-0008","url":null,"abstract":"Abstract Computing the vibrating characteristics of any machine or structure is a necessary process that should be performed by the mechanical engineers that work in engineering design field to avoid the collapse under different kinds of applied loads. One of these kinds of structures are the rotating blades, whereas this part is considered as an essential element in many rotating systems that are used in different fields of engineering, e.g., turbomachinery, turbofan, helicopters, etc. One of the biggest disadvantages that is realized in rotating blades is failure due to vibrations and unbalance. It is possible that vibrations significantly reduce the performance of rotating blades compared to standard design conditions. If these rotating blades continue to operate under these circumstances for sufficient time, then the status of these systems will be unstable. Finally, this will lead to collapse of the rotating blades. In this work, a new code was created from scratch, based on the finite element method, to determine the vibrational characteristics of the rotating blades, taking into consideration the effect of rotating speed and temperatures. The compound influence of thermal gradients and rotating speed on the vibrational response (frequencies) for different configurations of blade was studied deeply.","PeriodicalId":49848,"journal":{"name":"Measurement Science Review","volume":"22 1","pages":"65 - 72"},"PeriodicalIF":0.9,"publicationDate":"2022-03-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42429947","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Design of Distributed Fusion Predictor and Filter without Feedback for Nonlinear System with Correlated Noises and Random Parameter Matrices 具有相关噪声和随机参数矩阵的非线性系统的无反馈分布式融合预测器和滤波器设计

IF 0.9 4区工程技术

Measurement Science Review Pub Date : 2022-01-21 DOI: 10.2478/msr-2022-0003

Man-lu Liu, R. Lin, Jianliang Huo, Liguo Tan, Qing Ling, E. Zybin

{"title":"Design of Distributed Fusion Predictor and Filter without Feedback for Nonlinear System with Correlated Noises and Random Parameter Matrices","authors":"Man-lu Liu, R. Lin, Jianliang Huo, Liguo Tan, Qing Ling, E. Zybin","doi":"10.2478/msr-2022-0003","DOIUrl":"https://doi.org/10.2478/msr-2022-0003","url":null,"abstract":"Abstract This work presents distributed predictor and filter without feedback for nonlinear stochastic uncertain system with correlated noises. Firstly, for the problem that the process noise and measurement noise are correlated, the two-step prediction theorem based on projection theorem is used to replace the one-step prediction theorem, and the two-step prediction value of a single sensor is obtained. Secondly, the two-step prediction value of each sensor state is used as the measurement information to modify the distributed fusion predictor to obtain the distributed fusion prediction value. Then, according to the projection theorem, the prediction value of distributed fusion is used as measurement information to modify the filtering value of distributed fusion. Finally, the Cubature Kalman filter (CKF) algorithm is used to implement the algorithm proposed in this paper. By comparison with existing methods, the algorithm proposed in this paper solves the problem that existing methods cannot handle state estimation and prediction problems for nonlinear multi-sensor stochastic uncertain systems with correlated noises.","PeriodicalId":49848,"journal":{"name":"Measurement Science Review","volume":"22 1","pages":"17 - 31"},"PeriodicalIF":0.9,"publicationDate":"2022-01-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44516586","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Vectorcardiographic Ventricular Gradient with Constituents, and Myocardial Action Potential Parameter Distribution 有成分的心室梯度矢量图和心肌动作电位参数分布

IF 0.9 4区工程技术

Measurement Science Review Pub Date : 2022-01-21 DOI: 10.2478/msr-2022-0005

E. Aidu, V. Trunov

引用次数: 2