Measurement Science and Technology最新文献

Dynamic laboratory x-ray phase-contrast microtomography with structure-based prior regularisation. 基于结构的先验正则化的动态实验室x射线相衬显微断层扫描。

IF 3.4 3区工程技术

Measurement Science and Technology Pub Date : 2025-09-30 Epub Date: 2025-09-11 DOI: 10.1088/1361-6501/ae01c8

Harry Allan, Tom Partridge, Joseph Jacob, Marco Endrizzi

{"title":"Dynamic laboratory x-ray phase-contrast microtomography with structure-based prior regularisation.","authors":"Harry Allan, Tom Partridge, Joseph Jacob, Marco Endrizzi","doi":"10.1088/1361-6501/ae01c8","DOIUrl":"10.1088/1361-6501/ae01c8","url":null,"abstract":"X-ray microtomography is a versatile tool allowing the measurement of the 3D structure of optically thick samples. As a non-destructive technique, it is readily adapted to 4D imaging, where a sample can be monitored over time, and especially in conjunction with the application of external stimuli. To apply this technique with the limited x-ray flux available at a conventional laboratory source, we leverage the contrast enhancement of free-space propagation phase-contrast imaging, achieving an increase in contrast-to-noise ratio (CNR) of 5.8x. Furthermore, we combine this with iterative reconstruction, using regularisation by a structure-based prior from a high-quality reference scan of the object. This combination of phase-contrast imaging and iterative reconstruction leads to a 29.2x improvement in CNR compared to the conventional reconstruction. This enables fully dynamic x-ray microtomography, with a temporal resolution of 9 s at a voxel size of 10.5 μm. We use this to measure the movement of a waterfront in the fine vessels of a wooden skewer, as a representative example of dynamic system evolving on the scale of tens of seconds.","PeriodicalId":18526,"journal":{"name":"Measurement Science and Technology","volume":"36 9","pages":"095405"},"PeriodicalIF":3.4,"publicationDate":"2025-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12426885/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145065227","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Viscoelastic recovery times of chondrocytes measured using a novel 3D-printed microfluidic device. 使用新型3d打印微流体装置测量软骨细胞的粘弹性恢复时间。

IF 3.4 3区工程技术

Measurement Science and Technology Pub Date : 2025-08-31 Epub Date: 2025-08-12 DOI: 10.1088/1361-6501/adf65a

Michael Neubauer, Priyanka Brahmachary, Alan Fine, Ronald June, Stephan Warnat

{"title":"Viscoelastic recovery times of chondrocytes measured using a novel 3D-printed microfluidic device.","authors":"Michael Neubauer, Priyanka Brahmachary, Alan Fine, Ronald June, Stephan Warnat","doi":"10.1088/1361-6501/adf65a","DOIUrl":"10.1088/1361-6501/adf65a","url":null,"abstract":"This paper presents the development, production, and application of a 3D-printed microfluidic device designed to measure the viscoelastic recovery time of cartilage cells, chondrocytes. Bovine chondrocytes were imaged using a confocal microscope while compressed by a movable glass plate. Their recovery was monitored by tracking their projected area over time, converting it into a linear strain, and fitting it to a Burgers mechanical model. Strains ranging from 10% to 60% were applied to the cells, and model parameters, including the viscoelastic recovery time, were derived. We found that cells subjected to strains greater than 40% exhibited radially-symmetric deformations. This radially-symmetric deformation, possibly cell blebbing, was observed as a short-term effect, with the cell fully recovering its initial shape. Non-blebbing and blebbing chondrocytes exhibited viscoelastic recovery times of 42 s and 38 s, respectively. While the recovery time did not depend on the magnitude of applied strain, the measured permanent strain increased with higher applied strain magnitude. Overall, this study demonstrates the use of a new, low-cost 3D-printed microfluidic device in combination with advanced microscopy for characterizing the viscoelastic properties of cells.","PeriodicalId":18526,"journal":{"name":"Measurement Science and Technology","volume":"36 8","pages":"085701"},"PeriodicalIF":3.4,"publicationDate":"2025-08-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12340534/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144847624","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Role of extrinsic factors on magnetoelastic resonance biosensors sensitivity 外在因素对磁弹性共振生物传感器灵敏度的影响

IF 2.4 3区工程技术

Measurement Science and Technology Pub Date : 2024-01-12 DOI: 10.1088/1361-6501/ad1e1d

Luiza Felippi de Lima, Roberta Dutra, Diego González, Rubem Luis Sommer, C A Perottoni, C. Aguzzoli, Mariana Roesch-Ely

{"title":"Role of extrinsic factors on magnetoelastic resonance biosensors sensitivity","authors":"Luiza Felippi de Lima, Roberta Dutra, Diego González, Rubem Luis Sommer, C A Perottoni, C. Aguzzoli, Mariana Roesch-Ely","doi":"10.1088/1361-6501/ad1e1d","DOIUrl":"https://doi.org/10.1088/1361-6501/ad1e1d","url":null,"abstract":"\u0000 Magnetoelastic resonance devices are attractive for application as biosensors in health-related areas as they allow contactless detection of pathogenic agents with high sensitivity. After functionalization, they offer valuable diagnostic options that promote efficient capture of mass on the sensor surface through biological interactions. Magnetoelastic sensors are also sensitive to external factors such as temperature, magnetic fields, and variations in mass that can arise from processes unrelated to biological interactions, including corrosion and salt crystallization. This article evaluates extrinsic factors that affect the response of magnetoelastic resonance sensors for diagnostic applications. In particular, the influence of heat treatments, operation temperature, applied DC magnetic field bias, and corrosive environment were studied. The control of all these factors is crucial for the design, fabrication, and functionalization of magnetoelastic resonance biosensors and for the development of measuring instrumentation and effective measurement protocols. This work established maximum operating temperature and bias field variations to keep the sensor sensitivity. Heat treatment of the sensors before and after coating improved the signal-to-noise ratio and corrosion resistance. Further improvement in corrosion resistance was provided by cathodic protection, which has been proven beneficial for applications of magnetoelastic resonance sensors in aqueous fluids.","PeriodicalId":18526,"journal":{"name":"Measurement Science and Technology","volume":"15 9","pages":""},"PeriodicalIF":2.4,"publicationDate":"2024-01-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139437304","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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

Improved performance of BDS-3 time and frequency transfer based on an epoch differenced model with receiver clock estimation 基于带接收器时钟估计的历元差分模型的 BDS-3 时频传输性能改进

IF 2.4 3区工程技术

Measurement Science and Technology Pub Date : 2024-01-11 DOI: 10.1088/1361-6501/ad1db1

Pengfei Zhang, Yuanxi Yang, R. Tu, Yuping Gao, Bing Wang

{"title":"Improved performance of BDS-3 time and frequency transfer based on an epoch differenced model with receiver clock estimation","authors":"Pengfei Zhang, Yuanxi Yang, R. Tu, Yuping Gao, Bing Wang","doi":"10.1088/1361-6501/ad1db1","DOIUrl":"https://doi.org/10.1088/1361-6501/ad1db1","url":null,"abstract":"\u0000 The carrier-phase (CP) technique based on the BeiDou global satellite navigation system (BDS-3) has proven to be an important spatial tool for remote time and frequency transfer. The current CP technique models the receiver clock offset as a white noise stochastic process, and easily absorbs some unmodeled errors, which compromises time and frequency transfer performance. To further improve the performance of time and frequency transfer, a new BDS-3 receiver clock estimation algorithm based on the epoch-difference (ED) model is presented, and the mathematical principle and applied mode are discussed. The algorithm makes full use of both observation of current epoch and practical variation of receiver clock offset, further improving the performance of time and frequency transfer. Five MGEX network stations equipped with various types of receivers and antennas with dual-frequency BDS-3 signals were used to establish four time transfer links (i.e., AMC4–PTBB, BRUX–PTBB, OP71–PTBB, and WTZS–PTBB) to evaluate their effectiveness. The ED model improved all four time links in terms of noise level, with improvements of 17.0%, 18.3%, 20.3%, and 5.9% for AMC4–PTBB, BRUX–PTBB, OP71–PTBB, and WTZS–PTBB, respectively, when compared with the results from a non-ED model. ED model outputs were better than raw solutions in terms of frequency stability at all time links, particularly for average time intervals (tau) < 1,000 s. The mean improvement was 8.1% for AMC4–PTBB, 16.1% for BRUX–PTBB, 10.0% for OP71–PTBB, and 18.6% for WTZS–PTBB when the average time (tau) was less than 1,000 s.","PeriodicalId":18526,"journal":{"name":"Measurement Science and Technology","volume":"10 3","pages":""},"PeriodicalIF":2.4,"publicationDate":"2024-01-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139438883","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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 soft sensor model based on an improved semi-supervised stacked autoencoder for just-in-time updating of cement clinker production process data f-CaO 基于改进的半监督堆叠自动编码器的软传感器模型，用于及时更新水泥熟料生产过程数据 f-CaO

IF 2.4 3区工程技术

Measurement Science and Technology Pub Date : 2024-01-10 DOI: 10.1088/1361-6501/ad1d30

wei zheng, Hui Liu, XiaoYu Zhou, XiaoJun Xue, Heng Li, JianXun Liu

{"title":"A soft sensor model based on an improved semi-supervised stacked autoencoder for just-in-time updating of cement clinker production process data f-CaO","authors":"wei zheng, Hui Liu, XiaoYu Zhou, XiaoJun Xue, Heng Li, JianXun Liu","doi":"10.1088/1361-6501/ad1d30","DOIUrl":"https://doi.org/10.1088/1361-6501/ad1d30","url":null,"abstract":"\u0000 The free calcium oxide (f-CaO) content in cement clinker serves as a critical quality indicator for cement production. However, many soft sensor models employed for predicting f-CaO content utilize a limited amount of labeled data, leading to the underutilization of a substantial volume of unlabeled data and its associated information. To tackle these challenges, this study introduces soft sensor methodology based on improved semi-supervised Attention Stacked Autoencoders (ASS-SAE). We propose an enhanced confidence-generating pseudo-labeling technique to identify high-confidence pseudo-labeled samples from pseudo-labels within a subset of correlated samples, addressing the issue of inadequate labeled data. To fully utilize the information hidden in the unlabeled data, the proposed method incorporating the confidence attention mechanism then assigns weights to the high-confidence pseudo-labeled data and inputs them into the SAE along with labeled data from a subset of similar samples for re-fine-tuning. By conducting an illustrative analysis using authentic cement data proposed for this study, the effectiveness of the approaches employed in this research is substantiated.substantiated.","PeriodicalId":18526,"journal":{"name":"Measurement Science and Technology","volume":"6 9","pages":""},"PeriodicalIF":2.4,"publicationDate":"2024-01-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139439527","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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

Adaptive chessboard-like high-frequency projection method for three-dimensional measurement of shiny surfaces 用于光泽表面三维测量的自适应棋盘式高频投影法

IF 2.4 3区工程技术

Measurement Science and Technology Pub Date : 2024-01-10 DOI: 10.1088/1361-6501/ad1d48

Xinyue Zhao, Tiancheng Yu, Lianpeng Kang, Huarong Shen, Zaixing He

引用次数: 0

Development of Experimental Device for Inductive Heating of Magnetic Nanoparticles 磁性纳米粒子感应加热实验装置的开发

IF 2.4 3区工程技术

Measurement Science and Technology Pub Date : 2024-01-10 DOI: 10.1088/1361-6501/ad1d49

Vinicius Morgan, Amadeu Sum, Ning Wu, A. Dante, Ângelo Marcio de Souza Gomes, Luciana Spinelli, Fernando Gomes de Souza Jr, R. Allil, M. M. Werneck

{"title":"Development of Experimental Device for Inductive Heating of Magnetic Nanoparticles","authors":"Vinicius Morgan, Amadeu Sum, Ning Wu, A. Dante, Ângelo Marcio de Souza Gomes, Luciana Spinelli, Fernando Gomes de Souza Jr, R. Allil, M. M. Werneck","doi":"10.1088/1361-6501/ad1d49","DOIUrl":"https://doi.org/10.1088/1361-6501/ad1d49","url":null,"abstract":"\u0000 Abstract Inductive heating using magnetic nanoparticles (MNPs) is a critical process extensively investigated for cancer treatment. However, the high cost of commercially available equipment hinders its accessibility for many research groups. In response, this paper introduces a simple electronic circuit with low-cost components, making it easy to construct even for non-electronic experts. Operating within the 50 – 200 kHz range, the circuit employs a parallel inductor-capacitor configuration, providing a maximum induction magnetic field of 23.6 mT. Ltspice software simulations align well with oscilloscope measurements. Using commercial iron oxide nanoparticles (~16 nm) in water suspensions (1-10 mg/mL), the device exhibited a concentration-dependent reduction in Specific Absorption Rate (SAR) values, consistent with literature findings. Hyperthermia temperatures were achieved in a few minutes at 52.5 kHz and 23.6 mT in the highest concentration. At 81.9 kHz and 21.5 mT, a temperature of 93°C was achieved after 22 minutes at 10 mg/mL. Additionally, the device demonstrated stable and safe operation over a 100-minute period, as validated by an ice-melting experiment. These results highlight the device's efficacy for hyperthermia experiments in both biological and non-biological systems, particularly advantageous for larger nanoparticles in a blocked state. The proposed device holds significant potential for contributing to hyperthermia studies across diverse research groups. Future development will focus on frequency adjustment without reducing the alternating magnetic field amplitude and a thorough investigation of field homogeneity inside the coils.","PeriodicalId":18526,"journal":{"name":"Measurement Science and Technology","volume":"5 11","pages":""},"PeriodicalIF":2.4,"publicationDate":"2024-01-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139439140","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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

Weakly supervised medical image registration with multi-information guidance 多信息引导下的弱监督医学影像配准

IF 2.4 3区工程技术

Measurement Science and Technology Pub Date : 2024-01-10 DOI: 10.1088/1361-6501/ad1d2d

Weipeng Liu, Ziwen Ren, Xu Li

{"title":"Weakly supervised medical image registration with multi-information guidance","authors":"Weipeng Liu, Ziwen Ren, Xu Li","doi":"10.1088/1361-6501/ad1d2d","DOIUrl":"https://doi.org/10.1088/1361-6501/ad1d2d","url":null,"abstract":"\u0000 In recent years, the registration method based on deep learning has received extensive attention from scholars due to its superiority in real-time performance. Most of the work directly use convolutional neural networks to map the image to be registered into the transform space. However, the receptive field of convolutional neural networks is limited, and multi-layer convolution superposition is needed to obtain a relatively large receptive field. Transformer-based methods can better express spatial relationships through attention mechanisms. However, the self-attention and the multi-head mechanisms make each small block calculate the relationship with other small blocks regardless of distance. Due to the limited moving range of corresponding voxel points in the medical images, this long-distance dependence may cause the model to be interfered by long-distance voxels. In this paper, we convert the spatial transformation of the corresponding voxel points into the calculation of the basic vector basis to propose the SV-basis module and design a two-stage multi-scale registration model. Experiments are carried out on brain and lung datasets to prove the effectiveness and universality of the proposed registration method. According to the anatomical characteristics of medical images, the corresponding loss function is designed to introduce mask information into the registration task. The experimental results show that the proposed method can accurately register brain and lung images.","PeriodicalId":18526,"journal":{"name":"Measurement Science and Technology","volume":"8 6","pages":""},"PeriodicalIF":2.4,"publicationDate":"2024-01-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139439303","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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

MACHINE LEARNING IN LEGAL METROLOGY – DETECTING BREATHALYZERS’ FAILURES 法律计量学中的机器学习 - 检测酒精测试仪的故障

IF 2.4 3区工程技术

Measurement Science and Technology Pub Date : 2024-01-10 DOI: 10.1088/1361-6501/ad1d2c

Ana Gleice Silva Santos, Luiz Fernado Rust Carmo, Charles Bezerra do Prado

{"title":"MACHINE LEARNING IN LEGAL METROLOGY – DETECTING BREATHALYZERS’ FAILURES","authors":"Ana Gleice Silva Santos, Luiz Fernado Rust Carmo, Charles Bezerra do Prado","doi":"10.1088/1361-6501/ad1d2c","DOIUrl":"https://doi.org/10.1088/1361-6501/ad1d2c","url":null,"abstract":"\u0000 Metrological control of breathalyzers used at sobriety checkpoints is done by metrological institutes or police departments to ensure the accuracy of the results. Periodic checks carried out to ensure accurate measurements are not enough, as instruments can have errors between verifications that are not detected by traffic agents. In this article, we present a new proposal to evaluate instruments using machine learning algorithms capable of detecting failures before they occur. Historical instrument measurement data is used, with the application of classification techniques and thus labeling the instruments in order to indicate those that may previously fail before the next verification. Experiments are performed with fuel cells to identify which instruments have cells that can compromise measurement results during inspections. The study ends with the simulation of using the instrument to trace the wear curve over time. The results show that it is possible to apply machine learning to assist in the metrological control of breathalyzers and thus provide more security when these instruments are used in traffic inspections. ","PeriodicalId":18526,"journal":{"name":"Measurement Science and Technology","volume":"5 35","pages":""},"PeriodicalIF":2.4,"publicationDate":"2024-01-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139439756","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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 new model for bearing fault diagnosis based on mutual mapping of signals and images and sparse representation 基于信号和图像相互映射及稀疏表示的轴承故障诊断新模型

IF 2.4 3区工程技术

Measurement Science and Technology Pub Date : 2024-01-10 DOI: 10.1088/1361-6501/ad1d4a

Jing Yang, Yanping Bai, Xiuhui Tan, Rong Cheng, Hongping Hu, Peng Wang, Wendong Zhang

{"title":"A new model for bearing fault diagnosis based on mutual mapping of signals and images and sparse representation","authors":"Jing Yang, Yanping Bai, Xiuhui Tan, Rong Cheng, Hongping Hu, Peng Wang, Wendong Zhang","doi":"10.1088/1361-6501/ad1d4a","DOIUrl":"https://doi.org/10.1088/1361-6501/ad1d4a","url":null,"abstract":"\u0000 For the issue of significant noise in the collected bearing fault signals, a new bearing fault diagnosis model based on mutual mapping of signals and images (MMSI) and sparse representation (SR) denoising is proposed. Firstly, the fault signal is divided into several segments with the same number of sampling points, and then arrange these segments in ascending order of rows. Secondly, convert the arranged signals into grayscale image and use dictionary learning for block denoising. Then, the de-noised grayscale image is restored to a signal in line order. Finally, k-nearest neighbor (KNN) is used for fault classification. To verify the performance of the proposed model, experiments are tested on 12 single working conditions and 30 multi working conditions on the Case Western Reserve University (CWRU) dataset and the Paderborn dataset. The experimental results indicate that compared with some existing models, the MMSI-SR-KNN model can not only accurately diagnose bearing faults in artificial damage experiments, but also performs better in real damage faults. This indicates that the model has good generalization ability between different datasets and working conditions.","PeriodicalId":18526,"journal":{"name":"Measurement Science and Technology","volume":"69 20","pages":""},"PeriodicalIF":2.4,"publicationDate":"2024-01-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139440790","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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