IF 5.2 2区工程技术

Measurement Pub Date : 2025-02-07 DOI: 10.1016/j.measurement.2025.116959

Yuan Sui , Xiankun Liu , Linzhi Yao, Yu Sun, Taiji Dong, Penghui Dai, Peng Chen, Hongda Jiang, Chunlei Jiang

{"title":"Lens-integrated real-time simultaneous measurement of particle size and refractive index inspired by vision correction technology","authors":"Yuan Sui , Xiankun Liu , Linzhi Yao, Yu Sun, Taiji Dong, Penghui Dai, Peng Chen, Hongda Jiang, Chunlei Jiang","doi":"10.1016/j.measurement.2025.116959","DOIUrl":"10.1016/j.measurement.2025.116959","url":null,"abstract":"<div><div>In environmental and medical fields, particle size and refractive index are often need to be measured simultaneously. Current methods typically separate the excitation source and detector, increasing system complexity and optical loss. Inspired by vision correction techniques, this study introduces an innovative lens-integrated microfluidic platform. We utilized a tapered microcapillary combined with single-fiber optical tweezers to achieve real-time simultaneous measurement of the size and refractive index of yeast, silica, polymethyl methacrylate (PMMA) and polystyrene (PS). The curved outer wall of the tapered microcapillary acts like a meniscus lens, working with the spherical lens formed by the particles. This reduces spherical aberration, allowing precise adjustment of the light path and simplifying the device structure so that a single fiber serves as both the excitation source and detector. Experimental results show that for 0.1w.t.% particle concentration, real-time detection accurately reflects particle size and refractive index, with a maximum standard deviation of 0.34 %.</div></div>","PeriodicalId":18349,"journal":{"name":"Measurement","volume":"248 ","pages":"Article 116959"},"PeriodicalIF":5.2,"publicationDate":"2025-02-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143372333","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

Optimization design of noncircular gear planetary gear system based on noncircular beveloid gear

IF 5.2 2区工程技术

Measurement Pub Date : 2025-02-06 DOI: 10.1016/j.measurement.2025.116952

Longkun Li, Changbin Dong, Yongping Liu

{"title":"Optimization design of noncircular gear planetary gear system based on noncircular beveloid gear","authors":"Longkun Li, Changbin Dong, Yongping Liu","doi":"10.1016/j.measurement.2025.116952","DOIUrl":"10.1016/j.measurement.2025.116952","url":null,"abstract":"<div><div>To solve the problems of vibration and poor stability of Noncircular Planetary Gear (NPG), Noncircular Beveloid Gear (NBG) with automatic clearance adjustment function is proposed in this paper. Based on the characteristics of noncircular gear transmission and meshing principle, the NBG tooth surface equation was derived. By establishing a three-dimensional model of NBG, the accuracy of the theoretical model was verified, and it was applied to NPG for comparative research. The effects of different loads, velocities, and frictional forces on the optimization effect were analyzed. The research results indicate that NBG has the performance of both noncircular gears and involute beveloid gears, which can achieve variable transmission ratio. The contact area of the tooth surface is distributed in an inclined belt shape, and the transmission error ratio remains below 6 %, with stronger stability. After applying NBG to NPG, the problem of NPG tooth impact was improved, and the torque impact amplitude of the gear system was reduced to below 3.5 N·m, a year-on-year decrease of 58.99 %. The optimized NPG has a good mitigating effect on torque impact under different loads, rotational speed, and friction conditions.</div></div>","PeriodicalId":18349,"journal":{"name":"Measurement","volume":"248 ","pages":"Article 116952"},"PeriodicalIF":5.2,"publicationDate":"2025-02-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143372332","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

Correlation between linear conductance variability and accuracy in neuromorphic computing using AuNP-DNA/HfO2 bilayer memristor devices

IF 5.2 2区工程技术

Measurement Pub Date : 2025-02-06 DOI: 10.1016/j.measurement.2025.116960

Myoungsu Chae , Doowon Lee , Hyunbin Lee , Yuseong Jang , Taegi Kim , Youngeun Kim , Hee-Dong Kim

{"title":"Correlation between linear conductance variability and accuracy in neuromorphic computing using AuNP-DNA/HfO2 bilayer memristor devices","authors":"Myoungsu Chae , Doowon Lee , Hyunbin Lee , Yuseong Jang , Taegi Kim , Youngeun Kim , Hee-Dong Kim","doi":"10.1016/j.measurement.2025.116960","DOIUrl":"10.1016/j.measurement.2025.116960","url":null,"abstract":"<div><div>Memristor-based neuromorphic computing needs to improve energy efficiency using eco-friendly materials, but a single active layer with traditional materials still requires an improvement in reliability and performance. We propose a bilayers-memristor with gold nanoparticle (AuNP)-DNA for artificial synapse applications. As a result, the HfO<sub>2</sub>/AuNP-DNA-based memristor exhibits excellent linear weight update and large conductance ratio characteristics with high reliability and tunability. The high linearity of synaptic weights, achieved through simple programming according to pulse amplitude, can particularly enhance the device’s energy efficiency and learning accuracy in neural network applications. We assess the accuracy of the modified national institute of standards and technology simulations to compare the classification accuracy depending on linearity and the ratio of weight update. As a result, the smallest validation loss is observed at –7 V depression voltage, which has the best linearity and optimal conductance ratio, suggesting the potential application of the proposed memristor in neuromorphic computing.</div></div>","PeriodicalId":18349,"journal":{"name":"Measurement","volume":"248 ","pages":"Article 116960"},"PeriodicalIF":5.2,"publicationDate":"2025-02-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143372331","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

A dual-band gas sensing metastructure based on CPA for H2 production with SO2 oxidation reaction

IF 5.2 2区工程技术

Measurement Pub Date : 2025-02-06 DOI: 10.1016/j.measurement.2025.116965

Jia-Hao Zou , Jun-Yang Sui , Ting-Shuo Yao , Hai-Feng Zhang

{"title":"A dual-band gas sensing metastructure based on CPA for H2 production with SO2 oxidation reaction","authors":"Jia-Hao Zou , Jun-Yang Sui , Ting-Shuo Yao , Hai-Feng Zhang","doi":"10.1016/j.measurement.2025.116965","DOIUrl":"10.1016/j.measurement.2025.116965","url":null,"abstract":"<div><div>This paper presents a high-resolution dual-band gas sensing metastructure (GSM) based on coherent perfect absorptivity (CPA), designed for the concentration detection of hydrogen (H<sub>2</sub>) and sulfur dioxide (SO<sub>2</sub>). By establishing a linear relationship between the frequency shift of the absorptivity peak (AP) and the refractive index variation caused by gas concentration changes, the system simplifies the detection of environmental signals into linear photoelectric signals. Utilizing CPA, the GSM achieves dual-mode sensing for H<sub>2</sub> and SO<sub>2</sub> in different sensitivities through phase control. For H<sub>2</sub> concentration sensing, the two modes exhibit sensitivities of 8.84 THz/RIU and 2.3 THz/RIU, respectively. For SO<sub>2</sub>, the sensitivities are 46.8 THz/RIU and 17.76 THz/RIU. Moreover, for the sensing of both gases, excellent sensing performance can be achieved (high-quality factor is larger than 8.0 × 10<sup>4</sup> and detection limit is less than 2 × 10<sup>-7</sup> RIU). This combining CPA dual-band GSM, offers enhanced accuracy compared with single-band sensors, and provides a promising advancement for future measurement technologies.</div></div>","PeriodicalId":18349,"journal":{"name":"Measurement","volume":"248 ","pages":"Article 116965"},"PeriodicalIF":5.2,"publicationDate":"2025-02-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143372324","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

Using Mask R-CNN and distance transform to detect elephants on railway tracks for collision prevention

IF 5.2 2区工程技术

Measurement Pub Date : 2025-02-05 DOI: 10.1016/j.measurement.2025.116951

S.R. Mathu sudhanan , A. Kaleel Rahuman , S. Mohamed Mansoor Roomi

引用次数: 0

Fault diagnosis of rotating machinery with high-dimensional imbalance samples based on wavelet random forest

IF 5.2 2区工程技术

Measurement Pub Date : 2025-02-05 DOI: 10.1016/j.measurement.2025.116936

Zhen Guo , Wenliao Du , Chuan Li , Xibin Guo , Zhiping Liu

{"title":"Fault diagnosis of rotating machinery with high-dimensional imbalance samples based on wavelet random forest","authors":"Zhen Guo , Wenliao Du , Chuan Li , Xibin Guo , Zhiping Liu","doi":"10.1016/j.measurement.2025.116936","DOIUrl":"10.1016/j.measurement.2025.116936","url":null,"abstract":"<div><div>Rotary machinery is the key equipment in industrial production, and its running state directly affects production safety and efficiency. However, in practical applications, rotating machinery often faces the problem of imbalanced data categories, which not only reduces the accuracy of fault diagnosis but also affects the generalization ability of the model. To solve this problem, this paper proposes a wavelet packet transform (WPT) and random forest (RF) combination model called Wavelet Random Forest. Specifically, WPT is used to extract the time domain and frequency domain features of the signal, to reduce the complexity of the signal and enhance its expression ability. Then, the extracted features are classified by RF to improve the efficiency of fault diagnosis and classification performance effectively. The experimental results on two unbalanced datasets show that the proposed method is superior to the traditional methods in fault diagnosis tasks, and has a better classification effect, especially in the identification of a few classes of faults.</div></div>","PeriodicalId":18349,"journal":{"name":"Measurement","volume":"248 ","pages":"Article 116936"},"PeriodicalIF":5.2,"publicationDate":"2025-02-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143372328","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

Comparative analysis of fractal dimension and novel geometric indices for assessing branch cutting quality

IF 5.2 2区工程技术

Measurement Pub Date : 2025-02-05 DOI: 10.1016/j.measurement.2025.116941

Mohamad Safvati, Saeid Minaei, Alireza Mahdavian

{"title":"Comparative analysis of fractal dimension and novel geometric indices for assessing branch cutting quality","authors":"Mohamad Safvati, Saeid Minaei, Alireza Mahdavian","doi":"10.1016/j.measurement.2025.116941","DOIUrl":"10.1016/j.measurement.2025.116941","url":null,"abstract":"<div><div>The limitations of the fractal dimension analysis are addressed in this study through the introduction of innovative geometric parameters: Surface Smoothness Index (SSI), Area Deformation Coefficient (ADC), and Perimeter Deformation Coefficient (PDC). The effects of blade curvature, cutting speed, branch diameter, and moisture content on these indices were studied using a systematic approach. Image analysis was performed using ImageJ software to ensure accurate measurements in the evaluation of sheared Morus alba branches. Using Response Surface Methodology (RSM), the effects of various input parameters on cutting quality were examined. A single quality parameter, here fractal dimension (FD), was found to be insufficient for capturing the complexities of cutting quality, as none of the main, nonlinear, or interaction effects emerged as significant in the full quadratic model. This is while the novel geometric indices introduced here were able to effectively capture the intricate relationships in cutting quality. The results indicated that optimizing cutting parameters, namely, cutting speeds above 400 mm/min and blade curvature radii greater than 47 mm significantly improved cutting quality. It was determined that maintaining branch moisture content in the 40 to 42 % range is optimal for achieving acceptable performance. Overall, the study emphasized the importance of adjusting these input variables to enhance cutting effectiveness across various branch diameters. By taking the combined geometric parameters into account, more informed decisions could be made in pruning practices.</div></div>","PeriodicalId":18349,"journal":{"name":"Measurement","volume":"248 ","pages":"Article 116941"},"PeriodicalIF":5.2,"publicationDate":"2025-02-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143372329","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

A deep learning approach for the prediction of ionospheric total electron content (TEC) based on combined prediction and two-step loss fine-tuning

IF 5.2 2区工程技术

Measurement Pub Date : 2025-02-04 DOI: 10.1016/j.measurement.2025.116904

Mingjun Deng , Keyu Li , Ning Liu , Lijing Bu , Zhengpeng Zhang , Chengjun Wang , Yin Yang , Xiaoting Nie

{"title":"A deep learning approach for the prediction of ionospheric total electron content (TEC) based on combined prediction and two-step loss fine-tuning","authors":"Mingjun Deng , Keyu Li , Ning Liu , Lijing Bu , Zhengpeng Zhang , Chengjun Wang , Yin Yang , Xiaoting Nie","doi":"10.1016/j.measurement.2025.116904","DOIUrl":"10.1016/j.measurement.2025.116904","url":null,"abstract":"<div><div>With the increasing modern space mission complexity, synthetic aperture radar (SAR) has gained attention for its all-weather, all-day capabilities. Countries are actively developing low-frequency spaceborne SAR. However, ionospheric delay due to lower operating frequencies cannot be ignored, as it directly impacts SAR positioning accuracy. The ionosphere’s total electron content (TEC) directly indicates ionospheric delay magnitude, making accurate TEC estimation essential for real-time, high-precision spaceborne SAR positioning. This study employs Convolutional Gated Recurrent Units (ConvGRU) to examine the effects of model input length and prediction interval on TEC forecasts. A combined prediction strategy for medium- to long-term global ionospheric TEC improves performance by 55.6% compared to recursive methods. Furthermore, we used a two-step loss fine-tuning strategy to refine the combined prediction method. Statistical indicators demonstrate that our training strategy effectively improves the accuracy of combined predictions. Moreover, this strategy can be conveniently transferred to other deep learning methods.</div></div>","PeriodicalId":18349,"journal":{"name":"Measurement","volume":"248 ","pages":"Article 116904"},"PeriodicalIF":5.2,"publicationDate":"2025-02-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143372330","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

Vehicle-mounted GNSS navigation and positioning algorithm considering signal obstruction and fuzzy logic in urban environment

IF 5.2 2区工程技术

Measurement Pub Date : 2025-02-04 DOI: 10.1016/j.measurement.2025.116919

Zhe Yue , Wenzhuo Ma , Yuting Gao , Chenchen Sun , Mengshuo Zhang , Zengzeng Lian , Kezhao Li

{"title":"Vehicle-mounted GNSS navigation and positioning algorithm considering signal obstruction and fuzzy logic in urban environment","authors":"Zhe Yue , Wenzhuo Ma , Yuting Gao , Chenchen Sun , Mengshuo Zhang , Zengzeng Lian , Kezhao Li","doi":"10.1016/j.measurement.2025.116919","DOIUrl":"10.1016/j.measurement.2025.116919","url":null,"abstract":"<div><div>In response to the challenges of limited navigation and positioning accuracy in urban environments and insufficient utilization of Non-Line-of-Sight (NLOS) information, this paper proposes a vehicle-mounted GNSS navigation and positioning algorithm considering signal obstruction and fuzzy logic in urban environment. Initially, the environment information above the vehicle is captured with the assistance of the skyward fisheye camera. Based on the designed image segmentation technology, the sky and non-sky areas are distinguished. Subsequently, a satellite projection model is established to project satellite signals onto the obtained image, by comparing the edge pixel coordinates of the sky and non-sky areas, Line of Sight (LOS) and NLOS signals are differentiated. Furthermore, addressing the issue that existing research has not fully characterized the obstruction degree of NLOS signals, a method is proposed to represent the degree of obstruction of satellite NLOS signals based on the principle of the nearest pixel point and to reasonably utilize their useful information. Building on this, combining the obtained representation of satellite NLOS signal obstruction, elevation angle, and Signal-to-Noise Ratio (SNR), a weighted comprehensive assessment method is designed based on the characteristics of fuzzy logic in handling uncertainty and ambiguity, thereby fully and reasonably utilizing NLOS signal information. Finally, this method improves positioning accuracy by 43.61% and 39.15% compared to existing SNR/elevation-based and NLOS-discarding methods, respectively, and by 7.09% over the best results achieved with uniform weighting of NLOS signals. It also offers greater efficiency and robustness than methods relying on average pixel values to assess NLOS signals.</div></div>","PeriodicalId":18349,"journal":{"name":"Measurement","volume":"248 ","pages":"Article 116919"},"PeriodicalIF":5.2,"publicationDate":"2025-02-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143372325","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

Use of orthogonal treatment of acoustic attributes to study interaction effects in sound quality design

IF 5.2 2区工程技术

Measurement Pub Date : 2025-02-04 DOI: 10.1016/j.measurement.2025.116932

Daniel J. Lesko, Vinh Nguyen

{"title":"Use of orthogonal treatment of acoustic attributes to study interaction effects in sound quality design","authors":"Daniel J. Lesko, Vinh Nguyen","doi":"10.1016/j.measurement.2025.116932","DOIUrl":"10.1016/j.measurement.2025.116932","url":null,"abstract":"<div><div>Traditional methods of studying psychoacoustic attributes rely on subjective measurement of non-orthogonal sound samples. However, this approach has a narrow inference space due to the non-orthogonality of the acoustic attributes. This research aims to utilize an orthogonal treatment of acoustic attributes to study interaction effects in the sound quality of a fan-powered HVAC appliance by manipulating critical psychoacoustic attributes to create a broadened inference space. The results show that, in addition to the effects of loudness, sharpness, roughness, and prominence ratio, the roughness*prominence ratio, sharpness*prominence ratio, and the roughness*sharpness*prominence ratio interactions were statistically significant. Hence, this work demonstrates the importance of sound attribute interactions to consumers. Furthermore, comparing the empirical models without and with significant interactions demonstrated improvements in predicting the consumer response when including interaction effects. This work recommends considering psychoacoustic interactions, especially sharpness*roughness*prominence ratio, in designing products for improved consumer satisfaction.</div></div>","PeriodicalId":18349,"journal":{"name":"Measurement","volume":"248 ","pages":"Article 116932"},"PeriodicalIF":5.2,"publicationDate":"2025-02-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143350182","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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