Review of Scientific Instruments最新文献_第2页

An intelligent control strategy for high-flow nasal cannula based on electrical impedance tomography. 基于电阻抗断层成像的高流量鼻插管智能控制策略。

IF 1.7 4区工程技术

Review of Scientific Instruments Pub Date : 2025-10-01 DOI: 10.1063/5.0281951

Tian Peng, Guojun Li, Zhiwei Li, Yang Wu, Kai Liu, Jiafeng Yao

{"title":"An intelligent control strategy for high-flow nasal cannula based on electrical impedance tomography.","authors":"Tian Peng, Guojun Li, Zhiwei Li, Yang Wu, Kai Liu, Jiafeng Yao","doi":"10.1063/5.0281951","DOIUrl":"https://doi.org/10.1063/5.0281951","url":null,"abstract":"To improve the precision and adaptability of oxygen delivery in patients with chronic obstructive pulmonary disease, this study proposes an intelligent control method for high-flow nasal cannula (HFNC) based on Electrical Impedance Tomography (EIT). First, an equivalent circuit model of the HFNC-respiratory system was constructed to represent the physiological dynamics of airflow and muscle effort, and its validity was confirmed through physical experiments. Second, a dual closed-loop control architecture was developed, incorporating real-time EIT-derived ventilation information as the outer-loop feedback and flow rate as the inner-loop control target. The system was implemented using both conventional proportional-integral-derivative (PID) and fuzzy PID algorithms. Finally, a simulated lung platform equipped with EIT monitoring was built to experimentally evaluate the flow tracking performance. The results show that the fuzzy PID controller significantly improves control accuracy and stability, reducing the flow error by 46.1% and fluctuation by 69.1% under high-flow conditions compared to conventional PID. The proposed strategy presents a dynamic, individualized approach to respiratory support, demonstrating promise for advancing precision oxygen therapy in clinical settings.","PeriodicalId":21111,"journal":{"name":"Review of Scientific Instruments","volume":"96 10","pages":""},"PeriodicalIF":1.7,"publicationDate":"2025-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145233497","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

FusionX: A liquid-metal-jet x-ray source-powered multifunctional SAXS/WAXS/HR-XRD platform. FusionX：液态金属喷射x射线源驱动的多功能SAXS/WAXS/HR-XRD平台。

IF 1.7 4区工程技术

Review of Scientific Instruments Pub Date : 2025-10-01 DOI: 10.1063/5.0286956

Xiang Shi, Yaxiang Liang, Zhenzhong Li, Mu Li

引用次数: 0

A repetitive high voltage pulse generator based on a novel racetrack Blumlein type pulse forming line. 基于新型赛道Blumlein型脉冲形成线的重复高压脉冲发生器。

IF 1.7 4区工程技术

Review of Scientific Instruments Pub Date : 2025-10-01 DOI: 10.1063/5.0279322

Zilong Pan, Xinbing Cheng, Rong Chen, Hanwen Zhang, Rupei Li, Renjie Zhang, Baoliang Qian

{"title":"A repetitive high voltage pulse generator based on a novel racetrack Blumlein type pulse forming line.","authors":"Zilong Pan, Xinbing Cheng, Rong Chen, Hanwen Zhang, Rupei Li, Renjie Zhang, Baoliang Qian","doi":"10.1063/5.0279322","DOIUrl":"https://doi.org/10.1063/5.0279322","url":null,"abstract":"High voltage pulse generators are widely applied in high power microwave, plasma generation, material processing, and scientific research. Pulse forming lines are widely applied in high voltage pulse generators due to their high energy density and great ability with square waveform modulation. To get a higher energy transfer efficiency and lower characteristic impedance, a novel racetrack Blumlein type pulse forming line (R-BPFL) that is formed by two inner cylinders, two middle cylinders, and one outer cylinder is proposed in this paper. Moreover, repetitive operation is significant for pulse generators. Therefore, this paper proposes a high repetitive primary energy storage system incorporating an energy recovery circuit precisely controlled by three thyristors. A parameter optimization methodology is developed through theoretical analysis to simultaneously satisfy both high-frequency operation requirements and maximum compactness. Finally, a repetitive high voltage pulse generator based on the designed R-BPFL and primary energy storage system is constructed and tested. The experimental results show that the generator designed in this paper had an output power of 10.5 GW on a 40 Ω load, a pulse width of about 115 ns, a repetition rate of 20 Hz, and supported 640 pulses in one run.","PeriodicalId":21111,"journal":{"name":"Review of Scientific Instruments","volume":"96 10","pages":""},"PeriodicalIF":1.7,"publicationDate":"2025-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145252460","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

Flow visualization in CO2 two-phase ejector in refrigeration system. 制冷系统中CO2两相喷射器的流动显示。

IF 1.7 4区工程技术

Review of Scientific Instruments Pub Date : 2025-10-01 DOI: 10.1063/5.0249476

Linan Guan, Zherui Chen, Jingyue Sun, Yan Qin, Cong Chen, Bo Dong, Weizhong Li

引用次数: 0

The performance and analysis of the TianQin station during its first full moon ranging. 天琴站首次满月测距的性能与分析。

IF 1.7 4区工程技术

Review of Scientific Instruments Pub Date : 2025-10-01 DOI: 10.1063/5.0262755

A Xida Han, B Hui Li, C XuDong Lin, D XianLin Wu, E ShanQing Yang, F Yi Dai, G Ming Li, H ZhiGang Wu

引用次数: 0

Low-noise and compact detection system using RF MEMS switch for solid-state NMR spectroscopy at cryogenic temperature: Proof-of-concept experiment. 低噪音和紧凑的检测系统使用射频MEMS开关固态核磁共振波谱在低温：概念验证实验。

IF 1.7 4区工程技术

Review of Scientific Instruments Pub Date : 2025-10-01 DOI: 10.1063/5.0284141

Sotaro Nishioka, Naoki Sakuyama, Ken Obara, Akiko T Saito, Mitsuharu Yashima, Hidekazu Mukuda

{"title":"Low-noise and compact detection system using RF MEMS switch for solid-state NMR spectroscopy at cryogenic temperature: Proof-of-concept experiment.","authors":"Sotaro Nishioka, Naoki Sakuyama, Ken Obara, Akiko T Saito, Mitsuharu Yashima, Hidekazu Mukuda","doi":"10.1063/5.0284141","DOIUrl":"https://doi.org/10.1063/5.0284141","url":null,"abstract":"In nuclear magnetic resonance (NMR) spectroscopy, the signal from nuclear spins is extremely weak, and thus, it has been desired to improve the signal-to-noise ratio (SNR). In this study, we designed a compact low-noise probe and peripheral detection system optimized for low-temperature solid-state NMR spectroscopy. We confirmed the operation of a Tx/Rx switch composed of radio frequency microelectromechanical system (RF MEMS) switches and a preamplifier using high electron mobility transistors (HEMTs), which can operate even at 20 K and under a high magnetic field of ∼10 T. In our compactly designed NMR system, we succeeded in sufficiently reducing both thermal noise and external noise. As a result, the 195Pt- and 27Al-NMR measurements for Pt and Al solid powder samples were performed at 12 T and down to 20 K, showing that the SNR was improved by 40%-50% compared with the conventional system. These experiments also provide information on the low temperature properties and operational characteristics of integrated RF electronic devices, such as the RF MEMS switch, the HEMT, and their combined circuit system.","PeriodicalId":21111,"journal":{"name":"Review of Scientific Instruments","volume":"96 10","pages":""},"PeriodicalIF":1.7,"publicationDate":"2025-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145252428","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 an in-vacuum long trace profiler for in situ measurement of optical components. 用于光学元件原位测量的真空长轨迹轮廓仪的研制。

IF 1.7 4区工程技术

Review of Scientific Instruments Pub Date : 2025-09-01 DOI: 10.1063/5.0256054

Shang-Wei Lin, Chao-Chih Chiu, Ming-Ying Hsu, Chia-Feng Chang, Bo-Yi Chen, Gung-Chian Yin

{"title":"Development of an in-vacuum long trace profiler for in situ measurement of optical components.","authors":"Shang-Wei Lin, Chao-Chih Chiu, Ming-Ying Hsu, Chia-Feng Chang, Bo-Yi Chen, Gung-Chian Yin","doi":"10.1063/5.0256054","DOIUrl":"https://doi.org/10.1063/5.0256054","url":null,"abstract":"In this work, we developed a vacuum-compatible long trace profiler (LTP) for in situ metrology of ultra-precise x-ray optics within synchrotron vacuum chambers. Although traditional LTPs operate ex situ under atmospheric pressure, earlier optical setups-such as that by Qian et al.-performed in situ distortion measurements by directing laser beams through vacuum viewports. While these configurations enabled in situ monitoring of mirror deformation, their accuracy was constrained by optical distortions from vacuum windows and by beam deviations caused by air turbulence. To overcome these limitations, we developed a fully in-vacuum LTP system installed directly inside the vacuum chamber, fully compatible with ultrahigh vacuum (UHV) conditions (<1 × 10-8 Torr). Based on the original Takacs LTP design, the system incorporates a vacuum-compatible CMOS sensor, an external laser to reduce heat and weight, and a motorized four-axis alignment stage. This system is designed to measure low-spatial-frequency slope error, which is critical for evaluating optical figure quality. Performance was validated under identical atmospheric conditions using a conventional LTP for comparison. Under identical conditions, the in-vacuum LTP measured slope errors of 100 nrad RMS (flat) and 200 nrad RMS (curved). However, measurable deviations in curvature radius and coma coefficient were observed, attributed to stage wobble and lens aberrations. These findings confirm baseline performance and demonstrate the system's feasibility for UHV-compatible slope metrology. The in-vacuum LTP is intended to support real-time slope monitoring and feedback correction of active optical components during operation at synchrotron beamlines.","PeriodicalId":21111,"journal":{"name":"Review of Scientific Instruments","volume":"96 9","pages":""},"PeriodicalIF":1.7,"publicationDate":"2025-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144993336","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 high-sensitivity data collection system for time-resolved x-ray diffraction measurement at the photon factory advanced ring. 光子工厂先进环中时间分辨x射线衍射测量高灵敏度数据采集系统的研制。

IF 1.7 4区工程技术

Review of Scientific Instruments Pub Date : 2025-09-01 DOI: 10.1063/5.0261278

Le Thi My Nguyen, Shunsuke Nozawa, Daisuke Okuyama, Hironori Nakao, Keisuke Shibuya, Shin-Ichi Adachi, Ryo Fukaya

{"title":"Development of high-sensitivity data collection system for time-resolved x-ray diffraction measurement at the photon factory advanced ring.","authors":"Le Thi My Nguyen, Shunsuke Nozawa, Daisuke Okuyama, Hironori Nakao, Keisuke Shibuya, Shin-Ichi Adachi, Ryo Fukaya","doi":"10.1063/5.0261278","DOIUrl":"10.1063/5.0261278","url":null,"abstract":"We have developed a high-sensitivity data collection and measurement system for time-resolved x-ray diffraction experiments at the Photon Factory Advanced Ring. Use of x-ray pixel array photon counting detectors provides a suitable improvement in measurement sensitivity when compared to existing systems. The system is equipped with a laser that operates with a variable repetition rate, thus making it highly suitable for synchronization with the synchrotron x-ray source and the electronic gating detectors. Here, we present the measurement system configuration, provide details of the data collection scheme used for the single and double electronic gating features, and then demonstrate the capabilities of the system by measuring the transient dynamics of a weak x-ray diffraction peak that is attributed to the modulation of a long-range dimerized structural ordering via laser excitation in vanadium dioxide. The implementation of the system's output opens the possibility of performing ultrafast time-resolved x-ray measurements, even for target substances and phenomena that are difficult to measure when using conventional systems because of their weak signals, and this may provide a route toward ultrafast control of the physical properties of materials.","PeriodicalId":21111,"journal":{"name":"Review of Scientific Instruments","volume":"96 9","pages":""},"PeriodicalIF":1.7,"publicationDate":"2025-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144966748","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

Elemental analysis of molybdenum ore using charge coupled device (CCD) and intensified charge-coupled device (ICCD) based LIBS systems. 利用电荷耦合器件（CCD）和基于强化电荷耦合器件（ICCD）的LIBS系统对钼矿石进行元素分析。

IF 1.7 4区工程技术

Review of Scientific Instruments Pub Date : 2025-09-01 DOI: 10.1063/5.0277624

A Sammad, J Iqbal, N Ahmad, Rinda Hedwig, H Asghar, Z A Umar, M A Baig, R Ahmed

{"title":"Elemental analysis of molybdenum ore using charge coupled device (CCD) and intensified charge-coupled device (ICCD) based LIBS systems.","authors":"A Sammad, J Iqbal, N Ahmad, Rinda Hedwig, H Asghar, Z A Umar, M A Baig, R Ahmed","doi":"10.1063/5.0277624","DOIUrl":"https://doi.org/10.1063/5.0277624","url":null,"abstract":"Time-resolved data acquisition is crucial for compositional analysis using Laser-Induced Breakdown Spectroscopy (LIBS). It can be managed by adjusting the delay time and gate width of the spectrometer. This study describes the compositional analysis of molybdenum (Mo) ore utilizing charge coupled device (CCD) and intensified charge-coupled device (ICCD) based LIBS systems. LIBS was successfully used for both quantitative and qualitative analysis of molybdenum ore. Spectra were recorded with CCD and ICCD spectrometers. Plasma parameters were estimated from LIBS spectra to diagnose the plasma thoroughly. A performance comparison was conducted among LIBS measurements using ICCD, CCD, and x-ray fluorescence (XRF). The quantitative analysis of molybdenum ore was carried out using calibration-free LIBS. Both major and trace elements were identified in the spectra. Optical emission spectra showed varying element concentrations of Mo, silicon, aluminum, iron, calcium, potassium, tungsten, and sodium. The XRF was used to compare the performance of LIBS techniques. Results from the compositional analysis of molybdenum ore using ICCD, CCD-based LIBS, and XRF showed good agreement. It is demonstrated that CCD can produce nearly the same results as ICCD within acceptable error margins. The CCD-based LIBS system is a cost-effective analytical method with additional benefits for field applications because it does not require a temperature-controlled environment for operation.","PeriodicalId":21111,"journal":{"name":"Review of Scientific Instruments","volume":"96 9","pages":""},"PeriodicalIF":1.7,"publicationDate":"2025-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145030599","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 bioinspired piezoelectric stick-slip actuator designed by the moving posture of monkey. 基于猴子运动姿态设计的仿生压电粘滑致动器。

IF 1.7 4区工程技术

Review of Scientific Instruments Pub Date : 2025-09-01 DOI: 10.1063/5.0279874

Shitong Yang, Haochuan Chen, Zhenguo Zhang, Wenlong Wang, Xuetao Niu, Xiaohui Lu

引用次数: 0