Review of Scientific Instruments最新文献_第5页

Developing a robust sensor for infrared imaging bolometers. 为红外成像波长计开发坚固耐用的传感器。

IF 1.3 4区工程技术

Review of Scientific Instruments Pub Date : 2024-09-01 DOI: 10.1063/5.0219535

G A Wurden, G Partesotti, F Reimold, K Mukai, B J Peterson, F Federici

引用次数: 0

Multi-objective optimization of Stinger PDC cutter breaking rock parameters under intrusion-cutting action using Taguchi-based gray relational analysis. 利用基于田口的灰色关系分析法，对入侵切割作用下的 Stinger PDC 切割器破岩参数进行多目标优化。

IF 1.3 4区工程技术

Review of Scientific Instruments Pub Date : 2024-09-01 DOI: 10.1063/5.0224824

Minsheng Wang, Senlin He, Chao Xiong, Heng Wang, Lingchao Xuan, Huaizhong Shi, Hualin Liao, Zhongwei Huang

{"title":"Multi-objective optimization of Stinger PDC cutter breaking rock parameters under intrusion-cutting action using Taguchi-based gray relational analysis.","authors":"Minsheng Wang, Senlin He, Chao Xiong, Heng Wang, Lingchao Xuan, Huaizhong Shi, Hualin Liao, Zhongwei Huang","doi":"10.1063/5.0224824","DOIUrl":"https://doi.org/10.1063/5.0224824","url":null,"abstract":"To enhance the efficiency of the Stinger Polycrystalline Diamond Compact (PDC) cutter in breaking hard rocks, this study focuses on optimizing the cutter intrusion-cutting rock breaking parameters. A numerical calculation model for the rotational breaking of granite by a Stinger PDC cutter was established. A comprehensive statistical examination was performed to assess the influence of various factors on intrusion ability (IA), tangential force (TF), and mechanical specific energy (MSE). The Taguchi method was used to determine the optimal settings for each factor, while analysis of variance was employed to assess the significance and relative impact of these factors on the target outcomes. In addition, the multi-objective function was optimized using the gray relational analysis method. The primary process parameters obtained for the various performance characteristics are the cone top angle (α), the cone top radius (r), the cutter diameter (d), the cutter back inclination angle (β), and weight on bit (P). The impact ratios of these parameters are 6.20%, 7.66%, 3.93%, 17.20%, and 65.02%, respectively. The optimal geometrical parameters are α = 60°, r = 2 mm, and d = 15 mm, while the optimal working parameters are β = 30° and P = 800 N. In the optimal case, IA and MSE were reduced by 55.335% and 15.809%, respectively, compared to the initial case. Despite a 15.706% increase in TF, the overall GRG increased for all three evaluation criteria, with an overall increase in efficiency of 18.229%. The results of this paper can provide guidance for the design of Stinger cutter PDC drill bits.","PeriodicalId":21111,"journal":{"name":"Review of Scientific Instruments","volume":null,"pages":null},"PeriodicalIF":1.3,"publicationDate":"2024-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142154933","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 repetitive pulsed electrothermal plasma jet ignition system based on capillary discharge.

IF 1.3 4区工程技术

Review of Scientific Instruments Pub Date : 2024-09-01 DOI: 10.1063/5.0225316

Tianxu Liu, Runze Cheng, Ruodan Wang, Zheng Zhao, Yanan Wang, Anbang Sun

{"title":"A repetitive pulsed electrothermal plasma jet ignition system based on capillary discharge.","authors":"Tianxu Liu, Runze Cheng, Ruodan Wang, Zheng Zhao, Yanan Wang, Anbang Sun","doi":"10.1063/5.0225316","DOIUrl":"https://doi.org/10.1063/5.0225316","url":null,"abstract":"Plasma ignition and combustion enhancement is a promising technology in applications of engines, industrial burners, pollutant emissions controls, etc. A new repetitive electrothermal plasma jet ignition system based on ablated capillary discharge under atmospheric pressure is presented in this paper. It consists of a capillary discharge module, a pulse current circuit, a pulse voltage circuit, a current release unit, an LC series resonant circuit, and a control system. The effects of the energy storage capacitor's voltage and resistance in the current release unit on the electrical parameters are investigated. Increasing the capacitor voltage helps to shorten the discharge delay and increase the energy deposition efficiency in the main discharge process. The increase of the resistance in the current release unit leads to a longer discharge delay and higher energy deposition efficiency in the main discharge process. Balanced parameters between the delay of discharge in 66 µs and the energy deposition efficiency in 84% are achieved through optimization, with a peak radiative heat flux of 23 MW m-2 and a maximum jet length of 17 cm. Repetitive capillary discharge at 20 Hz under atmospheric pressure is achieved with the dispersion of energy storage capacitor charging voltage and energy deposition efficiency of 0.3% and 9.6%, respectively. Simplified circuit topology and control logic contribute to the miniaturization of the ignition system.","PeriodicalId":21111,"journal":{"name":"Review of Scientific Instruments","volume":null,"pages":null},"PeriodicalIF":1.3,"publicationDate":"2024-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142352848","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

An advanced double-phase stacking ensemble technique with active learning classifier: Toward reliable disruption prediction in Aditya tokamak.

IF 1.3 4区工程技术

Review of Scientific Instruments Pub Date : 2024-09-01 DOI: 10.1063/5.0222189

Priyanka Muruganandham, Sangeetha Jayaraman, Kumudni Tahiliani, Rakesh Tanna, Joydeep Ghosh, Surya K Pathak, Nilam Ramaiya

{"title":"An advanced double-phase stacking ensemble technique with active learning classifier: Toward reliable disruption prediction in Aditya tokamak.","authors":"Priyanka Muruganandham, Sangeetha Jayaraman, Kumudni Tahiliani, Rakesh Tanna, Joydeep Ghosh, Surya K Pathak, Nilam Ramaiya","doi":"10.1063/5.0222189","DOIUrl":"https://doi.org/10.1063/5.0222189","url":null,"abstract":"Disruptions in tokamak nuclear reactors, where plasma confinement is suddenly lost, pose a serious threat to the reactor and its components. Classifying discharges as disruptive or non-disruptive is crucial for effective plasma operation and advanced prediction. Traditional disruption identification systems often struggle with noise, variability, and limited adaptability. To address these challenges, we propose an enhanced stacking generalization model called the \"Double-Phase Stacking Technique\" integrated with Pool-based Active Learning (DPST-PAL) for designing a robust classifier with minimal labor cost. This innovative approach improves classification accuracy and reliability using advanced data analysis techniques. We trained the DPST-PAL model on 162 diagnostic shots from the Aditya dataset, achieving a high accuracy of 98% and an F1-score of 0.99, surpassing conventional methods. Subsequently, the deep 1D convolutional predictor model is implemented and trained using the classified shots obtained from the DPST-PAL model to validate the reliability of the dataset, which is tested on 47 distinct shots. This model accurately predicts the disruptions 7-13 ms in advance with 93.6% accuracy and exhibited no premature alarms or misclassifications for our experimental shots.","PeriodicalId":21111,"journal":{"name":"Review of Scientific Instruments","volume":null,"pages":null},"PeriodicalIF":1.3,"publicationDate":"2024-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142352849","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

Research and implementation of a large-bandwidth real-time radar jamming simulator.

IF 1.3 4区工程技术

Review of Scientific Instruments Pub Date : 2024-09-01 DOI: 10.1063/5.0223127

Zhengli Wang, Shulin Tian, Hao Zeng, Yu Tian, Meng Wang, Xiaoyu Yu

{"title":"Research and implementation of a large-bandwidth real-time radar jamming simulator.","authors":"Zhengli Wang, Shulin Tian, Hao Zeng, Yu Tian, Meng Wang, Xiaoyu Yu","doi":"10.1063/5.0223127","DOIUrl":"https://doi.org/10.1063/5.0223127","url":null,"abstract":"The electromagnetic environment faced by modern radar is becoming increasingly complex. One effective means to improve the performance of radar systems is testing in an anti-jamming ability test chamber, where the increased complexity has also led to higher performance requirements for radar jamming simulators. Based on the requirements for modern radar system testing, this paper presents a study of a large-bandwidth real-time radar jamming simulator and describes its overall design architecture; the simulator covers the L-Ku and Ka frequency bands and the instantaneous bandwidth is ≥2 GHz, which means that the system is able to simulate 11 interference patterns. Synchronous control of the system is realized in 1 ms through use of the reflection memory interrupt mechanism, the synchronous pulse signal mechanism, synchronous timing design, and a real-time control software architecture. An overall design scheme for real-time simulation of a radar target jamming echo is given and baseband signal processing resources are saved through information preprocessing, a large-capacity high-speed storage board is designed to improve the data reading speed, a multiphase filtering structure is used to achieve high sampling rates and save hardware resources, and a high-speed parallel computing method is used to improve computing efficiency; the actual measured baseband signal processing time is less than 500 ns. Finally, a measurement platform is built, and the main interference patterns are verified through experimental measurements.","PeriodicalId":21111,"journal":{"name":"Review of Scientific Instruments","volume":null,"pages":null},"PeriodicalIF":1.3,"publicationDate":"2024-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142352864","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

Temperature stabilization of a lab space at 10 mK-level over a day.

IF 1.3 4区工程技术

Review of Scientific Instruments Pub Date : 2024-09-01 DOI: 10.1063/5.0213133

Dylan Fife, Dong-Chel Shin, Vivishek Sudhir

引用次数: 0

Ambulatory ECG noise reduction algorithm for conditional diffusion model based on multi-kernel convolutional transformer. 基于多核卷积变换器的条件扩散模型的非卧床心电图降噪算法。

IF 1.3 4区工程技术

Review of Scientific Instruments Pub Date : 2024-09-01 DOI: 10.1063/5.0222123

Huiquan Wang, Juya Zhang, Xinming Dong, Tong Wang, Xin Ma, Jinhai Wang

{"title":"Ambulatory ECG noise reduction algorithm for conditional diffusion model based on multi-kernel convolutional transformer.","authors":"Huiquan Wang, Juya Zhang, Xinming Dong, Tong Wang, Xin Ma, Jinhai Wang","doi":"10.1063/5.0222123","DOIUrl":"https://doi.org/10.1063/5.0222123","url":null,"abstract":"Ambulatory electrocardiogram (ECG) testing plays a crucial role in the early detection, diagnosis, treatment evaluation, and prevention of cardiovascular diseases. Clear ECG signals are essential for the subsequent analysis of these conditions. However, ECG signals obtained during exercise are susceptible to various noise interferences, including electrode motion artifact, baseline wander, and muscle artifact. These interferences can blur the characteristic ECG waveforms, potentially leading to misjudgment by physicians. To suppress noise in ECG signals more effectively, this paper proposes a novel deep learning-based noise reduction method. This method enhances the diffusion model network by introducing conditional noise, designing a multi-kernel convolutional transformer network structure based on noise prediction, and integrating the diffusion model inverse process to achieve noise reduction. Experiments were conducted on the QT database and MIT-BIH Noise Stress Test Database and compared with the algorithms in other papers to verify the effectiveness of the present method. The results indicate that the proposed method achieves optimal noise reduction performance across both statistical and distance-based evaluation metrics as well as waveform visualization, surpassing eight other state-of-the-art methods. The network proposed in this paper demonstrates stable performance in addressing electrode motion artifact, baseline wander, muscle artifact, and the mixed complex noise of these three types, and it is anticipated to be applied in future noise reduction analysis of clinical dynamic ECG signals.","PeriodicalId":21111,"journal":{"name":"Review of Scientific Instruments","volume":null,"pages":null},"PeriodicalIF":1.3,"publicationDate":"2024-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142154929","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 700 kV pulse generator with a rise time on the order of several nanoseconds. 700 千伏脉冲发生器，上升时间约为几纳秒。

IF 1.3 4区工程技术

Review of Scientific Instruments Pub Date : 2024-09-01 DOI: 10.1063/5.0222037

Junna Li, Yongliang Wang, Xiaoyu Zhou, Haoliang Shi, Fangzheng Wu, Qixiang Huang, Qisheng Li, Yiting Zhang

引用次数: 0

Laboratory demonstration of an off-axis optical bench design for future gravity missions. 用于未来重力飞行任务的离轴光学工作台设计的实验室演示。

IF 1.3 4区工程技术

Review of Scientific Instruments Pub Date : 2024-09-01 DOI: 10.1063/5.0215690

Bo Peng, Kailan Wu, Jingui Wu, Zhongkai Guo, Yun Wang, Ming Li, Yongchao Zheng, Xu Li, Chenhui Xia, Shaojun Bai, Yiqun Wang, Xuling Lin

引用次数: 0

Integrated test system for interfacial strength and morphology of multi-type hydrate-bearing sediments. 多类型含水沉积物界面强度和形态综合测试系统。

IF 1.3 4区工程技术

Review of Scientific Instruments Pub Date : 2024-09-01 DOI: 10.1063/5.0212247

Yajuan Zhang, Yanlong Li, Nengyou Wu, Lilin Li, Yunkai Ji, Lin Dong, Zhiwen Sun, Ke Ke

{"title":"Integrated test system for interfacial strength and morphology of multi-type hydrate-bearing sediments.","authors":"Yajuan Zhang, Yanlong Li, Nengyou Wu, Lilin Li, Yunkai Ji, Lin Dong, Zhiwen Sun, Ke Ke","doi":"10.1063/5.0212247","DOIUrl":"https://doi.org/10.1063/5.0212247","url":null,"abstract":"Predicting the strength parameters of multi-type sediments containing hydrates is the basis and precondition for the safe and efficient development of natural gas hydrates. However, studies on the shear mechanical behavior and morphology of multi-type hydrate-bearing sediments (HBS) are still insufficient. Herein, this study presents an integrated test system that can be used to measure the interfacial strength and morphology of multi-type sediments containing hydrates. This device integrates specimen preparation, shear test, morphology observation, and data analysis, which is helpful to comprehensively evaluate interfacial strength, roughness, and morphology. The propagation and development characteristics of microfractures of HBS during shearing can be obtained, which is favorable for identifying the damage and failure modes. Preliminary validation experiments have been conducted on massive pure hydrate, hydrate-sediment interface, and homogenous HBS to verify the applicability of the device for multi-type HBS. The device and corresponding analysis method are expected to support the evaluation of interfacial strength and morphology, thereby promoting a deeper understanding of hydrate-sediment interactions and failure mechanisms of hydrate reservoirs.","PeriodicalId":21111,"journal":{"name":"Review of Scientific Instruments","volume":null,"pages":null},"PeriodicalIF":1.3,"publicationDate":"2024-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142120489","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