IEEE Transactions on Instrumentation and Measurement最新文献

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Active Autofocusing Method With Plane Tilt Correction for AR Microdisplay Inspection
IF 5.6 2区 工程技术
IEEE Transactions on Instrumentation and Measurement Pub Date : 2025-03-27 DOI: 10.1109/TIM.2025.3553246
Chen-Ming Zhong;Yu-Hang Lin;Guo-Long Chen;Li-Hong Zhu;Yi-Jun Lu;Zhong Chen;Wei-Jie Guo
{"title":"Active Autofocusing Method With Plane Tilt Correction for AR Microdisplay Inspection","authors":"Chen-Ming Zhong;Yu-Hang Lin;Guo-Long Chen;Li-Hong Zhu;Yi-Jun Lu;Zhong Chen;Wei-Jie Guo","doi":"10.1109/TIM.2025.3553246","DOIUrl":"https://doi.org/10.1109/TIM.2025.3553246","url":null,"abstract":"An active autofocusing technology with plane tilt correction is proposed for the first time for use in display application scenarios. This technology is based on the variance of the Laplacian operator and machine vision principles. A deep learning-based multilayer perceptual classification neural network is proposed to quickly determine the tilt state of the plane and facilitate device-camera alignment. In testing, the neural network achieved 99.3% accuracy. The technology has demonstrated feasibility for leveling and focusing in commercial microdisplays for augmented reality (AR) applications within the micrometer-scale focus range through experimental validation. Our proposed autofocusing method is suitable for industrial inspection and offers the advantages of a lower risk of sample damage caused by auxiliary components and easy integration.","PeriodicalId":13341,"journal":{"name":"IEEE Transactions on Instrumentation and Measurement","volume":"74 ","pages":"1-11"},"PeriodicalIF":5.6,"publicationDate":"2025-03-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143769417","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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
Kinetic Chain Analysis of Tennis Stroke Motion Utilizing Wearable Sensors
IF 5.6 2区 工程技术
IEEE Transactions on Instrumentation and Measurement Pub Date : 2025-03-26 DOI: 10.1109/TIM.2025.3554882
Weizheng Chen;Yue Jia
{"title":"Kinetic Chain Analysis of Tennis Stroke Motion Utilizing Wearable Sensors","authors":"Weizheng Chen;Yue Jia","doi":"10.1109/TIM.2025.3554882","DOIUrl":"https://doi.org/10.1109/TIM.2025.3554882","url":null,"abstract":"In tennis training, it is crucial to assist players in comprehending their erroneous movements and enhancing motion efficiency. As the foundation of tennis strokes, kinetic chain theory can significantly improve stroke quality and prevent sports injuries. However, current motion analysis predominantly relies on geometric principles, while kinetic analysis methods have yet to effectively translate kinetic chain theory into an accessible and intuitive motion analysis tool. Additionally, a quantitative metric that can directly elucidate and refine the coordination of players’ movements has not been well-established. Consequently, this research integrates digital human motion data with visual graphs and quantifiable features to scientifically analyze tennis strokes. Initially, human motion data is collected using wearable sensors. Subsequently, motion control theory is examined, and hand contribution velocity (HCV) is defined to measure the impact of each human joint on the overall racket-hand velocity. Following this, the tennis stroke is digitally visualized using the innovative kinetic chain diagram (KCD). Next, contribution features and time delay features are extracted from the KCD, further quantifying the characteristics of the motion for assessment purposes. Finally, 15 tennis players across three skill levels participate in a tennis stroke experiment using an automated ball machine, and their stroke motions are visually analyzed using the proposed methods; the effect of motion and grip style on kinetic chain is also discussed. This study presents an innovative approach that integrates sports motion analysis with information technology, thereby facilitating players’ skill enhancement through a scientific methodology.","PeriodicalId":13341,"journal":{"name":"IEEE Transactions on Instrumentation and Measurement","volume":"74 ","pages":"1-8"},"PeriodicalIF":5.6,"publicationDate":"2025-03-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143817957","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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
Contribution Imbalance and the Improvement Method in Multisensor Information Fusion-Based Intelligent Fault Diagnosis of Rotating Machinery
IF 5.6 2区 工程技术
IEEE Transactions on Instrumentation and Measurement Pub Date : 2025-03-26 DOI: 10.1109/TIM.2025.3554886
Tantao Lin;Zhijun Ren;Kai Huang;Xinzhuo Zhang;Yongsheng Zhu;Ke Yan;Jun Hong
{"title":"Contribution Imbalance and the Improvement Method in Multisensor Information Fusion-Based Intelligent Fault Diagnosis of Rotating Machinery","authors":"Tantao Lin;Zhijun Ren;Kai Huang;Xinzhuo Zhang;Yongsheng Zhu;Ke Yan;Jun Hong","doi":"10.1109/TIM.2025.3554886","DOIUrl":"https://doi.org/10.1109/TIM.2025.3554886","url":null,"abstract":"The contribution of different signals to rotating machinery fault diagnosis can vary significantly, leading to suboptimal performance in multisensor information fusion-based intelligent fault diagnosis (MIF-IFD). This article examines the issue of imbalanced contributions in MIF-IFD models, explores its causes, and proposes an improvement method. We introduce a contribution discrepancy module to evaluate the contribution of various sensor signals to fault identification. By controlling the training pace of high-contribution branch networks, low-contribution parts are trained sufficiently to keep up. In addition, a distillation module is added to guide each branch network’s learning direction by using outputs from pretrained single-sensor networks as supervisory signals. This approach helps mitigate the degradation in feature extraction ability due to imbalanced training. Experimental results show that the proposed method performs well across two datasets and is valuable for practical deployment in MIF-IFD systems.","PeriodicalId":13341,"journal":{"name":"IEEE Transactions on Instrumentation and Measurement","volume":"74 ","pages":"1-14"},"PeriodicalIF":5.6,"publicationDate":"2025-03-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143777789","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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
Passive Wireless Method for Measuring the Preloads of Threaded Pipe Joints
IF 5.6 2区 工程技术
IEEE Transactions on Instrumentation and Measurement Pub Date : 2025-03-26 DOI: 10.1109/TIM.2025.3554896
Chenfei Du;Jianhua Liu;Hao Gong;Jiayu Huang;Xujia Wang
{"title":"Passive Wireless Method for Measuring the Preloads of Threaded Pipe Joints","authors":"Chenfei Du;Jianhua Liu;Hao Gong;Jiayu Huang;Xujia Wang","doi":"10.1109/TIM.2025.3554896","DOIUrl":"https://doi.org/10.1109/TIM.2025.3554896","url":null,"abstract":"Threaded pipe joints are widely used in engineering applications. However, vibration and shock loads during operation can cause preload reduction, potentially leading to issues such as leakage and fatigue failure. Hence, real-time preload monitoring is essential for threaded pipe joints. Generally, to measure preloads, strain gauges can be bonded to the outer surface of the nut, as it is sensitive to slight deformations caused by preload changes in threaded pipe joints. However, traditional strain-gauge-based preload measurement methods require either an embedded battery or an external wired power supply, along with cables for signal transmission, making them unsuitable for confined or inaccessible locations during practical applications. To address these shortcomings, the present study proposes a novel passive wireless method for measuring the preloads of threaded pipe joints. This method includes a power supply, a sensor, and reading modules. It also includes a direct-current filtering technique to mitigate the impact of electromagnetic interference on strain-gauge measurement accuracy. In addition, a temperature compensation model based on multiple linear regression is applied to reduce the sensitivity of preload measurements to temperature. A functional measurement device was subsequently built based on this method. Experimental results validated the greater accuracy and reliability of this method compared to those of other methods, demonstrating its strong potential for engineering applications.","PeriodicalId":13341,"journal":{"name":"IEEE Transactions on Instrumentation and Measurement","volume":"74 ","pages":"1-10"},"PeriodicalIF":5.6,"publicationDate":"2025-03-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143808993","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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
Error-Weighted Collaborative Dictionary Learning for Rolling Bearings Fault Diagnosis
IF 5.6 2区 工程技术
IEEE Transactions on Instrumentation and Measurement Pub Date : 2025-03-26 DOI: 10.1109/TIM.2025.3554870
Chuliang Liu;Zhonghe Huang;Xian Wang
{"title":"Error-Weighted Collaborative Dictionary Learning for Rolling Bearings Fault Diagnosis","authors":"Chuliang Liu;Zhonghe Huang;Xian Wang","doi":"10.1109/TIM.2025.3554870","DOIUrl":"https://doi.org/10.1109/TIM.2025.3554870","url":null,"abstract":"The fluctuating operational environments in rotating machinery systems lead to temporal variations in signal patterns, thereby significantly increasing the complexity of constructing an accurate and robust dictionary in the sparse representation (SR) method. To address this issue, this article proposes a new error-weighted collaborative dictionary learning (EWCDL) method for fault detection of rolling bearings. The approach introduces a data fidelity term that incorporates the local features of the signal, aiming to overcome the inherent assumption of uniform weighting in K-singular value decomposition (K-SVD). Then, a specialized dictionary learning model is developed to achieve collaborative enhancement of the performance of a superior dictionary in conjunction with an inferior one. In addition, to reduce the influence of outliers on the extraction of local features, the density-based spatial clustering of applications with noise (DBSCAN) method was utilized to identify and eliminate prominent outliers. The validity and effectiveness of this approach are verified by simulation analysis and case studies.","PeriodicalId":13341,"journal":{"name":"IEEE Transactions on Instrumentation and Measurement","volume":"74 ","pages":"1-12"},"PeriodicalIF":5.6,"publicationDate":"2025-03-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143808862","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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 Optimization of a Low-Power and Low-Complexity Digital Driven-Right-Leg Circuit for Active-Electrode Measurement Systems
IF 5.6 2区 工程技术
IEEE Transactions on Instrumentation and Measurement Pub Date : 2025-03-26 DOI: 10.1109/TIM.2025.3554913
Techapon Songthawornpong;Woradorn Wattanapanitch
{"title":"Design Optimization of a Low-Power and Low-Complexity Digital Driven-Right-Leg Circuit for Active-Electrode Measurement Systems","authors":"Techapon Songthawornpong;Woradorn Wattanapanitch","doi":"10.1109/TIM.2025.3554913","DOIUrl":"https://doi.org/10.1109/TIM.2025.3554913","url":null,"abstract":"This article presents a methodology for optimizing the design of a digital driven-right-leg (DRL) circuit for use in improving the common-mode rejection ratio (CMRR) of multichannel active-electrode (AE) biopotential measurement systems operating with dry electrodes. Taking into consideration important design aspects including stability and performance, the proposed methodology aims to maximize the system’s CMRR while minimizing the DRL circuit’s complexity and power consumption. Our design methodology is validated through an ECG measurement system implemented with discrete components. Measured results show that, even with low-resolution data converters, the digital DRL circuit can help boost the overall CMRR by 77.6 dB. With only 6 bits of resolutions for its data converters operating from a full-scale range of 3.3 V, the proposed DRL circuit enables an AE pair, with a poor intrinsic CMRR of 38.26 dB and without the help of any notch filtering, to acquire ECG from dry electrodes with unnoticeable powerline interference.","PeriodicalId":13341,"journal":{"name":"IEEE Transactions on Instrumentation and Measurement","volume":"74 ","pages":"1-12"},"PeriodicalIF":5.6,"publicationDate":"2025-03-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143800807","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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
An Improved OTDR Signal Denoising Method Based on ICEEMDAN-NLM Algorithm
IF 5.6 2区 工程技术
IEEE Transactions on Instrumentation and Measurement Pub Date : 2025-03-26 DOI: 10.1109/TIM.2025.3554855
Fan Zhang;Hao Ran;Bin Li;Xu Zhang;Lei Guo;Xiaoxue Gong
{"title":"An Improved OTDR Signal Denoising Method Based on ICEEMDAN-NLM Algorithm","authors":"Fan Zhang;Hao Ran;Bin Li;Xu Zhang;Lei Guo;Xiaoxue Gong","doi":"10.1109/TIM.2025.3554855","DOIUrl":"https://doi.org/10.1109/TIM.2025.3554855","url":null,"abstract":"Optical time-domain reflectometer (OTDR) is a key device for diagnosing the health of optical fiber links. The backscattered signals it relies on are inevitably affected by noise during transmission, especially when the signal is weak and severely disturbed, making it difficult to identify events in the test curve. Consequently, filtering out noise from these signals to facilitate subsequent fault localization and event recognition has emerged as a critical problem to solve. To address this issue, a novel OTDR signal denoising method has been proposed, combining an improved complete ensemble empirical mode decomposition with adaptive noise (ICEEMDAN) with nonlocal means (NLM) filtering. This approach classifies the intrinsic mode function (IMF) components derived from ICEEMDAN based on their sample entropy values, reconstructs the divided signal components, and further filters out high-frequency noise components using the NLM algorithm, to complete the effective denoising of the OTDR signal. Comparative analyses through simulations and practical examples show that this method outperforms traditional denoising techniques such as soft and hard wavelet thresholding, improved wavelet thresholding, NLM, and ICEEMDAN-improved wavelet thresholding in terms of denoising effectiveness. The proposed method has significant improvements/reductions in signal-to-noise ratio (SNR)/root mean square error (RMSE) and provides a new approach for noise reduction in OTDR signals.","PeriodicalId":13341,"journal":{"name":"IEEE Transactions on Instrumentation and Measurement","volume":"74 ","pages":"1-9"},"PeriodicalIF":5.6,"publicationDate":"2025-03-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143809022","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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
RUL Prediction of Rolling Bearings With MVGA-DSAL: A Multiscale Variant Gaussian Attention Model With Depth-Wise Sparse Attention LSTM
IF 5.6 2区 工程技术
IEEE Transactions on Instrumentation and Measurement Pub Date : 2025-03-26 DOI: 10.1109/TIM.2025.3551998
Wei Fan;Zhiyuan Chang;Shaoyi Xu;Zhennan Fan;Ye Yuan
{"title":"RUL Prediction of Rolling Bearings With MVGA-DSAL: A Multiscale Variant Gaussian Attention Model With Depth-Wise Sparse Attention LSTM","authors":"Wei Fan;Zhiyuan Chang;Shaoyi Xu;Zhennan Fan;Ye Yuan","doi":"10.1109/TIM.2025.3551998","DOIUrl":"https://doi.org/10.1109/TIM.2025.3551998","url":null,"abstract":"The performance of mechanical systems relies heavily on the condition of rolling bearings, with any damage potentially leading to catastrophic failures. Accurate bearing health monitoring and remaining useful life (RUL) prediction are crucial. This article proposes a data-driven framework, the multiscale variant Gaussian self-attention (MVGA), integrated with a depth-wise sparse attention long short-term memory (DSAL) mechanism. Specifically, the MVGA module employs a segmented multiscale Gaussian distance mask self-attention mechanism, which prioritizes critical positions and reveals hidden cyclic frequencies, addressing the positional limitations of conventional self-attention methods. The DSAL module, in turn, extracts temporal features across multiple scales, from local to global, facilitating effective multiscale temporal feature processing. Depth-wise propagation minimizes fluctuations in health curves and mitigates information loss and feature confusion from deep stacking, thereby enhancing model stability and robustness. Experimental results demonstrate that our approach effectively addresses limitations within Transformer networks, yielding more accurate predictions and outperforming existing methods in terms of prediction accuracy and model robustness.","PeriodicalId":13341,"journal":{"name":"IEEE Transactions on Instrumentation and Measurement","volume":"74 ","pages":"1-11"},"PeriodicalIF":5.6,"publicationDate":"2025-03-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143761423","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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
Variable-Scale Spectral Feature Gram (VSFgram): A Convergence Property-Driven Autonomous Periodic Transients Extraction Approach
IF 5.6 2区 工程技术
IEEE Transactions on Instrumentation and Measurement Pub Date : 2025-03-26 DOI: 10.1109/TIM.2025.3554903
Duxi Shang;Yong Lv;Rui Yuan;Zhuyun Chen;Hewenxuan Li;Ersegun Deniz Gedikli
{"title":"Variable-Scale Spectral Feature Gram (VSFgram): A Convergence Property-Driven Autonomous Periodic Transients Extraction Approach","authors":"Duxi Shang;Yong Lv;Rui Yuan;Zhuyun Chen;Hewenxuan Li;Ersegun Deniz Gedikli","doi":"10.1109/TIM.2025.3554903","DOIUrl":"https://doi.org/10.1109/TIM.2025.3554903","url":null,"abstract":"Precise localization of the optimal frequency band (OFB) and extraction of periodic transients are crucial for effective bearing fault diagnosis. This article proposes a novel approach called the variable-scale spectral feature gram (VSFgram) for periodic transients extraction. The method begins with the development of a spectral feature detector (SFD) based on the convergence property of the variational mode extraction (VME), enabling the identification of the spectral feature. Building on the SFD, a novel multilevel spectral segmentation framework based on variable-scale spectral feature detection (VSFD) is developed, where boundary frequencies (BFs) are adaptively derived from the vibration signal to effectively isolate the OFB. To refine the process, an improved fault feature metric named autonomous frequency domain signal-to-noise ratio (AFDSNR) is proposed, which guides OFB selection and automatically estimates fault characteristic frequency (FCF) from enhanced envelope spectrum (EES) information. The OFB is then located by maximizing the AFDSNR, enabling the reconstruction of corresponding periodic transients. The superiority of the proposed method is validated through simulations and experimental analyses. Compared to methods such as Fast Kurtogram (FK) and Autogram, the VSFgram demonstrates superior accuracy and robustness in bearing fault diagnosis.","PeriodicalId":13341,"journal":{"name":"IEEE Transactions on Instrumentation and Measurement","volume":"74 ","pages":"1-15"},"PeriodicalIF":5.6,"publicationDate":"2025-03-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143808995","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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 Broadband Terahertz WR-3 Waveguide Microcalorimeter in the 220~330 GHz
IF 5.6 2区 工程技术
IEEE Transactions on Instrumentation and Measurement Pub Date : 2025-03-26 DOI: 10.1109/TIM.2025.3554869
Wenze Yuan;Weidong Hu;Yuming Bai;Xiaohai Cui;Xiaomeng Liu;Jinwen Liu;Yong Li
{"title":"Development of a Broadband Terahertz WR-3 Waveguide Microcalorimeter in the 220~330 GHz","authors":"Wenze Yuan;Weidong Hu;Yuming Bai;Xiaohai Cui;Xiaomeng Liu;Jinwen Liu;Yong Li","doi":"10.1109/TIM.2025.3554869","DOIUrl":"https://doi.org/10.1109/TIM.2025.3554869","url":null,"abstract":"This article proposes a power sensor and a WR-3 waveguide microcalorimeter that can achieve traceable measurement of <inline-formula> <tex-math>$220sim 330$ </tex-math></inline-formula>-GHz terahertz wave power. The power sensor is based on a novel multilayer sensing chip with a smaller size and easier chip connection. The energy absorption of the terahertz power sensor could be more than 90%. The proposed WR-3 rectangular waveguide microcalorimeter has measurement stability and thermopile linearity. Subsequently, the measurement results of the proposed microcalorimeter are calibrated with mathematical derivation and practical experiments. It demonstrates that the proposed microcalorimeter could work well with an effective efficiency measurement uncertainty of <inline-formula> <tex-math>$0.017sim 0.035$ </tex-math></inline-formula> (<inline-formula> <tex-math>${k} =2$ </tex-math></inline-formula>) in the band of <inline-formula> <tex-math>$220sim 330$ </tex-math></inline-formula> GHz.","PeriodicalId":13341,"journal":{"name":"IEEE Transactions on Instrumentation and Measurement","volume":"74 ","pages":"1-9"},"PeriodicalIF":5.6,"publicationDate":"2025-03-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143808863","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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
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