Review of Scientific Instruments最新文献_第7页

Automatic arrival picking for microseismic signals based on variational mode decomposition and Akaike information criterion. 基于变分模态分解和Akaike信息准则的微震信号自动到达拾取。

IF 1.3 4区工程技术

Review of Scientific Instruments Pub Date : 2025-04-01 DOI: 10.1063/5.0239346

Chunlu Wang, Yanqing Fan, Renjie He, Jiwu Li, Fa Zhao, Xiaohua Zhou, Zubin Chen

{"title":"Automatic arrival picking for microseismic signals based on variational mode decomposition and Akaike information criterion.","authors":"Chunlu Wang, Yanqing Fan, Renjie He, Jiwu Li, Fa Zhao, Xiaohua Zhou, Zubin Chen","doi":"10.1063/5.0239346","DOIUrl":"https://doi.org/10.1063/5.0239346","url":null,"abstract":"Microseismic (MS) monitoring, which captures signals generated during rock mass fractures, can monitor changes in underground reservoir characteristics. It is of significant importance for the guidance and evaluation of hydraulic fracturing and prediction of geological disasters. However, the signals recorded by seismic detectors often contain various types of noise, especially in surface monitoring with more complex environments. Extracting effective MS signals and accurately picking up their arrivals serves as the foundation for subsequent positioning and other inversion processes. Given the unknown frequency distribution of effective MS signals, it is difficult to achieve signal-to-noise separation through simple filtering methods. In this paper, we propose a novel automatic arrival picking method based on variational mode decomposition (VMD) and Akaike information criterion (AIC). First, VMD is utilized to decompose the original signal into several intrinsic mode functions (IMFs). Then, the Pearson correlation coefficient (CC) and peak-to-average power ratio (PAPR) are combined to determine the effective components. Finally, we reconstruct the signal and employ the AIC method to pick up the arrival of MS events. Applying this method to synthetic tests based on Ricker wavelet, the results demonstrate that it can accurately distinguish effective signals from noise components, exhibiting superior robustness to noise compared to other arrival picking methods. Furthermore, the processing results of field MS signals during the fracturing process of a shale gas well in Sichuan Province also validate the advantages and application potential of the proposed method.","PeriodicalId":21111,"journal":{"name":"Review of Scientific Instruments","volume":"96 4","pages":""},"PeriodicalIF":1.3,"publicationDate":"2025-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144042002","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

Ultrasonic nondestructive testing for composite bonded structures based on convolutional neural network and bidirectional gated recurrent unit (CNN-BiGRU) optimized by attention mechanism. 基于卷积神经网络和双向门控循环单元（CNN-BiGRU）的复合材料键合结构超声无损检测。

IF 1.3 4区工程技术

Review of Scientific Instruments Pub Date : 2025-04-01 DOI: 10.1063/5.0246397

Wenhan Qu, Yintang Wen, Ning Yao, Yuyan Zhang, Xiaoyuan Luo

{"title":"Ultrasonic nondestructive testing for composite bonded structures based on convolutional neural network and bidirectional gated recurrent unit (CNN-BiGRU) optimized by attention mechanism.","authors":"Wenhan Qu, Yintang Wen, Ning Yao, Yuyan Zhang, Xiaoyuan Luo","doi":"10.1063/5.0246397","DOIUrl":"https://doi.org/10.1063/5.0246397","url":null,"abstract":"New ceramic matrix composites (CMCs) are commonly used as thermal protection materials bonded to the surfaces of aircraft substrates. Defects in composite bonded structures can cause the protective layer to detach from the airframe, seriously endangering aircraft safety. Ultrasonic nondestructive testing is a promising method for detecting defects in multilayer bonded structures. However, the porous nature and strong sound absorption of CMC result in severe attenuation and scattering of ultrasonic detection signals, reducing the signal-to-noise ratio. This makes it challenging to accurately identify real defect signals. Therefore, a novel method combining a convolutional neural network and a bidirectional gated recurrent unit (CNN-BiGRU) optimized by an attention mechanism, along with ultrasonic inspection, is proposed to identify defects in composite bonded structures. The method learns time and frequency domain features of original signals through convolution, applies an attention mechanism to determine the importance of these features, and delivers weighted results to the bidirectional gated recurrent unit network. Then, time and frequency domain features are fused, and a one-dimensional global average pooling layer is employed to reduce model parameters and prevent network overfitting. A nonlinear support vector machine is utilized as the final classifier instead of the traditional softmax classifier. The results indicated that the proposed CNN-BiGRU model surpasses traditional classifiers that require manual feature extraction, achieving an accuracy of 97.70%. The method addresses the limitations of traditional techniques and provides a valuable reference for defect identification in composite bonded structures for practical engineering applications.","PeriodicalId":21111,"journal":{"name":"Review of Scientific Instruments","volume":"96 4","pages":""},"PeriodicalIF":1.3,"publicationDate":"2025-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143996303","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

Direct two-dimensional goniometric steering of vacuum electrospray ion beams for angular time-of-flight studies. 用于角飞行时间研究的真空电喷雾离子束的直接二维几何转向。

IF 1.3 4区工程技术

Review of Scientific Instruments Pub Date : 2025-04-01 DOI: 10.1063/5.0240136

Zach Ulibarri, Elaine Petro

{"title":"Direct two-dimensional goniometric steering of vacuum electrospray ion beams for angular time-of-flight studies.","authors":"Zach Ulibarri, Elaine Petro","doi":"10.1063/5.0240136","DOIUrl":"https://doi.org/10.1063/5.0240136","url":null,"abstract":"Vacuum electrospray ionization (ESI) thrusters are an emerging electric propulsion (EP) technology that operate by firing ions from vacuum stable ionic liquids at high velocity. These ESI systems have the potential to be among the most efficient propulsion sources available while also providing a level of precise thrust control that is difficult or impossible to achieve with other EP sources. However, the angular properties of the ESI ejecta plumes are not well understood, particularly with respect to off-axis firing, molecular composition across the plume, and droplet accumulation, which can cause electrical shorts that disable the thruster. Here, we present a novel method for two-dimensional steering of vacuum electrospray ionization beams to better understand their angular properties. Utilizing an externally wetted tungsten needle with the ionic liquid 1-ethyl-3-methylimidazolium tetrafluoroborate (EMI-BF4), we employ a dual-axis goniometer to achieve in vacuo beam steering in both pitch and yaw. This setup enables detailed angular-dependent time-of-flight measurements of molecular species within the ESI plume as a function of plume angle. Our findings reveal significant variations in the relative abundance of monomers, dimers, trimers, and heavy species across different beam angles, with monomers being at a relative minimum and fragments, trimers, and heavy species being at a relative maximum at the beam center. The ability to accurately aim the ion beam dramatically enhances the signal-to-noise ratio for various diagnostic tools, underscoring the utility of this system for both scientific studies and practical laboratory applications. This two-dimensional steering capability offers a robust framework for future investigations into ESI plume dynamics and composition, enabling more precise characterizations that are critical for optimizing ESI-based propulsion systems and other applications.","PeriodicalId":21111,"journal":{"name":"Review of Scientific Instruments","volume":"96 4","pages":""},"PeriodicalIF":1.3,"publicationDate":"2025-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143754386","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

MIRACLES, the backscattering spectrometer of the European Spallation Source: Meeting scientific requirements with design. 欧洲散裂源后向散射光谱仪：设计满足科学要求。

IF 1.3 4区工程技术

Review of Scientific Instruments Pub Date : 2025-04-01 DOI: 10.1063/5.0241954

Félix J Villacorta, Heloisa N Bordallo, Alexander Conde, José E M Pereira, Roberto Martínez, Idoia Mazkiaran, Iván Aranda, Octavio G Del Moral, Aitor Zugazaga, Giles Harper, Masatoshi Arai

{"title":"MIRACLES, the backscattering spectrometer of the European Spallation Source: Meeting scientific requirements with design.","authors":"Félix J Villacorta, Heloisa N Bordallo, Alexander Conde, José E M Pereira, Roberto Martínez, Idoia Mazkiaran, Iván Aranda, Octavio G Del Moral, Aitor Zugazaga, Giles Harper, Masatoshi Arai","doi":"10.1063/5.0241954","DOIUrl":"https://doi.org/10.1063/5.0241954","url":null,"abstract":"MIRACLES, the neutron time-of-flight backscattering instrument of the European Spallation Source (ESS), will be the spectrometer with the highest energy resolution at the start of the ESS user program. The long pulse provided by the ESS source allows tuning the energy resolution of the instrument, with the concomitant capability of probing a wide range of molecular and atomic timescales, unfolding new opportunities in neutron spectroscopy to disentangle complex dynamics faster in a single experiment and allowing the use of smaller and more diluted samples. This work will report on a detailed description of the design efforts to bring MIRACLES from the scientific requirements to the construction and commissioning phases. This includes the provision of high and tailored energy resolution, optimization of the signal-to-background ratio, and the ability for integration of new equipment and scientific capabilities that will make MIRACLES a paramount asset for the ESS neutron scientific instrument suite.","PeriodicalId":21111,"journal":{"name":"Review of Scientific Instruments","volume":"96 4","pages":""},"PeriodicalIF":1.3,"publicationDate":"2025-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143754410","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

A study on FBG accelerometer for low-frequency vibration monitoring. 用于低频振动监测的光纤光栅加速度计的研究。

IF 1.3 4区工程技术

Review of Scientific Instruments Pub Date : 2025-04-01 DOI: 10.1063/5.0246583

Xiaoyong Fan, Xin Luo, Yuxin Guan, Qiong Wu

引用次数: 0

Design and experiment of a four-station laser tracker multilateration measurement system and evaluation of uncertainties. 四站激光跟踪仪多精度测量系统的设计与实验及不确定度评定。

IF 1.3 4区工程技术

Review of Scientific Instruments Pub Date : 2025-04-01 DOI: 10.1063/5.0237838

Ting Ding, Xiaoye He, Yiliang Lin, Wei Wang, Xiaolong Wang

引用次数: 0

Development of x-ray imaging diagnostics on Experimental Advanced Superconducting Tokamak using Timepix3 detector. 基于Timepix3探测器的实验性先进超导托卡马克x射线成像诊断研究进展。

IF 1.3 4区工程技术

Review of Scientific Instruments Pub Date : 2025-04-01 DOI: 10.1063/5.0240031

Jichao Wang, Jianhua Yang, Ming Xu, Xiaofeng Han, Jiancheng Hou, YuanXiu Zhu, Yan Li, Shiyao Lin, Liqing Xu, Jizong Zhang, Ruijie Zhou

{"title":"Development of x-ray imaging diagnostics on Experimental Advanced Superconducting Tokamak using Timepix3 detector.","authors":"Jichao Wang, Jianhua Yang, Ming Xu, Xiaofeng Han, Jiancheng Hou, YuanXiu Zhu, Yan Li, Shiyao Lin, Liqing Xu, Jizong Zhang, Ruijie Zhou","doi":"10.1063/5.0240031","DOIUrl":"https://doi.org/10.1063/5.0240031","url":null,"abstract":"An x-ray imaging diagnostic system using the Timepix3 detector has recently been developed and installed on the Experimental Advanced Superconducting Tokamak (EAST). The diagnostic system measures the temporal evolution, spatial distribution, and energy spectrum of x-ray signals during plasma discharge with a 16° diagonal field of view, spatial resolution of 4 mm, and broad spectral-energy response range (5-200 keV). Equipped with event-driven capability, the Timepix3 detector captures the coordinates, energy, and arrival time of each photon event with a temporal resolution of 1.56 ns. Herein, the energy resolution and spatial resolution performances of the detector were tested in counting and time-over-threshold modes. The energy resolution of the detector in both modes was within 5 keV. The temporal resolution of the detector and the temporal evolution of x-ray signals were analyzed during plasma discharge experiments on the EAST, harnessing the event-driven capability of the detector for latter analysis. Furthermore, the detector-measured signals were compared with conventional diagnostic signals, confirming the reliability of the Timepix3 detector. Overall, this paper presents the parameter testing results and preliminary experimental diagnostic outcomes.","PeriodicalId":21111,"journal":{"name":"Review of Scientific Instruments","volume":"96 4","pages":""},"PeriodicalIF":1.3,"publicationDate":"2025-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144042005","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

Development of a 3-D tomography technique for Large Helical Device bolometry using EMC3-EIRENE grids. 基于EMC3-EIRENE网格的大型螺旋装置热测量三维断层扫描技术的发展。

IF 1.3 4区工程技术

Review of Scientific Instruments Pub Date : 2025-04-01 DOI: 10.1063/5.0225703

Koyo Munechika, Hiroaki Tsutsui, Byron J Peterson, Kiyofumi Mukai, Gakushi Kawamura, Daihong Zhang, Felix Reimold, Gabriele Partesotti

引用次数: 0

Detection of dynamic temperature modulation using a thermal scanning probe lithography (t-SPL) system. 利用热扫描探针光刻（t-SPL）系统检测动态温度调制。

IF 1.3 4区工程技术

Review of Scientific Instruments Pub Date : 2025-04-01 DOI: 10.1063/5.0245701

M Ryu, F Könemann, S Kamegaki, C van Nisselroy, K Buddha, E Cagin, J Morikawa

{"title":"Detection of dynamic temperature modulation using a thermal scanning probe lithography (t-SPL) system.","authors":"M Ryu, F Könemann, S Kamegaki, C van Nisselroy, K Buddha, E Cagin, J Morikawa","doi":"10.1063/5.0245701","DOIUrl":"https://doi.org/10.1063/5.0245701","url":null,"abstract":"Nanoscale measurements of thermophysical properties, based on detecting temperature responses to periodic heat stimulation, can be achieved using a localized heating point instead of a localized sensing point. However, the concept of determining localized thermophysical properties via nano-heating as an alternative to nano-sensing has not yet been validated. In this study, we demonstrate the measurement of thermal diffusivity within a nanoscale-confined volume using a thermal scanning probe lithography (t-SPL) system. The sharp tip of the t-SPL probe is employed to locally and periodically heat the sample, which is placed on a pre-fabricated micro-thermocouple. Using the temperature wave analysis method, the thermal diffusivity of the sample is inferred from the frequency-dependent phase shift in the temperature response of a thermocouple. This technique was applied to the microscale structure of a chemically amplified negative-tone photoresist (mr-DWL). We show that confining the heat source to a nanoscale point contact can achieve spatial resolution at the nanoscale (10-100 nm), offering an alternative approach to miniaturizing the detector sensor.","PeriodicalId":21111,"journal":{"name":"Review of Scientific Instruments","volume":"96 4","pages":""},"PeriodicalIF":1.3,"publicationDate":"2025-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143804144","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

Two-color CO2 laser long-distance interference measurements with long-time stabilization in JT-60SA. JT-60SA双色CO2激光长时间稳定远距离干涉测量。

IF 1.3 4区工程技术

Review of Scientific Instruments Pub Date : 2025-04-01 DOI: 10.1063/5.0221294

H Sasao, Y Ohtani, S Chiba, T Nakano, M Yoshida

引用次数: 0