Frontiers in Physics最新文献_第9页

Transformation regulation of the paraxial finite Airy–Gaussian beam array propagating through uniaxial electro-optic crystals 通过单轴电光晶体传播的准轴向有限 Airy-Gaussian 光束阵列的变换调节

IF 3.1 3区物理与天体物理

Frontiers in Physics Pub Date : 2024-07-12 DOI: 10.3389/fphy.2024.1426495

Long Jin, Yang Xiang

引用次数: 0

IntervoxNet: a novel dual-modal audio-text fusion network for automatic and efficient depression detection from interviews IntervoxNet：用于从访谈中自动高效检测抑郁的新型双模态音频-文本融合网络

IF 3.1 3区物理与天体物理

Frontiers in Physics Pub Date : 2024-07-12 DOI: 10.3389/fphy.2024.1430035

Huijun Ding, Zhou Du, Ziwei Wang, Junqi Xue, Zhaoguo Wei, Kongjun Yang, Shan Jin, Zhiguo Zhang, Jianhong Wang

{"title":"IntervoxNet: a novel dual-modal audio-text fusion network for automatic and efficient depression detection from interviews","authors":"Huijun Ding, Zhou Du, Ziwei Wang, Junqi Xue, Zhaoguo Wei, Kongjun Yang, Shan Jin, Zhiguo Zhang, Jianhong Wang","doi":"10.3389/fphy.2024.1430035","DOIUrl":"https://doi.org/10.3389/fphy.2024.1430035","url":null,"abstract":"Depression is a prevalent mental health problem across the globe, presenting significant social and economic challenges. Early detection and treatment are pivotal in reducing these impacts and improving patient outcomes. Traditional diagnostic methods largely rely on subjective assessments by psychiatrists, underscoring the importance of developing automated and objective diagnostic tools. This paper presents IntervoxNet, a novel computeraided detection system designed specifically for analyzing interview audio. IntervoxNet incorporates a dual-modal approach, utilizing both the Audio Mel-Spectrogram Transformer (AMST) for audio processing and a hybrid model combining Bidirectional Encoder Representations from Transformers with a Convolutional Neural Network (BERT-CNN) for text analysis. Evaluated on the DAIC-WOZ database, IntervoxNet demonstrates excellent performance, achieving F1 score, recall, precision, and accuracy of 0.90, 0.92, 0.88, and 0.86 respectively, thereby surpassing existing state of the art methods. These results demonstrate IntervoxNet’s potential as a highly effective and efficient tool for rapid depression screening in interview settings.","PeriodicalId":12507,"journal":{"name":"Frontiers in Physics","volume":"80 1","pages":""},"PeriodicalIF":3.1,"publicationDate":"2024-07-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141611700","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Modeling the impact of coincidence loss on count rate statistics and noise performance in counting detectors for imaging applications 模拟重合损失对成像应用中计数探测器计数率统计和噪声性能的影响

IF 3.1 3区物理与天体物理

Frontiers in Physics Pub Date : 2024-07-08 DOI: 10.3389/fphy.2024.1408430

P. Zambon

{"title":"Modeling the impact of coincidence loss on count rate statistics and noise performance in counting detectors for imaging applications","authors":"P. Zambon","doi":"10.3389/fphy.2024.1408430","DOIUrl":"https://doi.org/10.3389/fphy.2024.1408430","url":null,"abstract":"Coincidence loss can have detrimental effects on the image quality provided by pixelated counting detectors, especially in dose-sensitive applications like cryoEM where the information extracted from the recorded signal needs to be maximized. In this work, we investigate the impact of coincidence loss phenomena on the recorded statistics in counting detectors producing sparse binary images. First, we derive exact analytical expressions for the mean and the variance of the recorded counts as a function of the incoming event rate. Second, we address the problem of the mean and variance of the recorded events (i.e., pixel clusters identified as individual incoming events), which also acts as a function of the incoming event rate. In this frame, we review previous studies from different disciplines on approximated two-dimensional models, and we critically reinterpret them in our context and evaluate the suitability of their adoption in the present case. The knowledge of the first two momenta of the recorded statistics allows inferring about the signal-to-noise ratio (SNR) and the detective quantum efficiency at zero frequency (DQE0). Analytical results are validated through comparison with numerical data obtained with a custom-made Monte Carlo code. We chose a realistic case study for cryoEM application consisting of a 25-µm-thick MAPS detector featuring a pixel size of 10 µm and illuminated with electrons of 300 keV energy over a wide range of incoming rate.","PeriodicalId":12507,"journal":{"name":"Frontiers in Physics","volume":"13 1","pages":""},"PeriodicalIF":3.1,"publicationDate":"2024-07-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141569492","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Proton electromagnetic generalized polarizabilities 质子电磁广义极化率

IF 3.1 3区物理与天体物理

Frontiers in Physics Pub Date : 2024-07-05 DOI: 10.3389/fphy.2024.1426128

N. Sparveris

引用次数: 0

Numerical analysis and experimental verification of time-dependent heat conduction under the action of ultra-short pulse laser 超短脉冲激光作用下随时间变化的热传导的数值分析和实验验证

IF 3.1 3区物理与天体物理

Frontiers in Physics Pub Date : 2024-07-04 DOI: 10.3389/fphy.2024.1416064

Yan Wang, Jingting Liu, Chunyan Wang, Xinmin Fan, Zhaohong Liu, Xiaodong Huang, Lujun Zhang, Sensen Li, Yu Zhang

{"title":"Numerical analysis and experimental verification of time-dependent heat conduction under the action of ultra-short pulse laser","authors":"Yan Wang, Jingting Liu, Chunyan Wang, Xinmin Fan, Zhaohong Liu, Xiaodong Huang, Lujun Zhang, Sensen Li, Yu Zhang","doi":"10.3389/fphy.2024.1416064","DOIUrl":"https://doi.org/10.3389/fphy.2024.1416064","url":null,"abstract":"Thermal action is a crucial process in laser processing. The classical Fourier heat conduction theory, which assumes an infinite speed of heat propagation, is commonly applied to describe steady-state and mild transient thermal processes. However, under the influence of ultra-short pulse lasers, such as those with picosecond and femtosecond durations, the heat propagation speed within the material is finite and deviates from Fourier’s law. This article addresses the unique characteristics of heat conduction in materials subjected to ultra-short pulse laser exposure by integrating Fourier’s law with the Gaussian distribution of the actual pulse laser output power density and the material’s optical absorption properties. It introduces a time variable to establish a time-dependent heat conduction equation. This equation is numerically analyzed using a difference algorithm. Based on this, simulation and experimental studies on the processing of dental hard tissues with a 1064 nm ps laser were conducted. The results show that the experimental processing depths were slightly larger than the simulation results, which may be due to damage to the dental hard tissues and the thermomechanical effects during processing. The results offer a technical reference for adjusting laser parameters in the ultra-short pulse laser processing technique.","PeriodicalId":12507,"journal":{"name":"Frontiers in Physics","volume":"139 1","pages":""},"PeriodicalIF":3.1,"publicationDate":"2024-07-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141552927","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

An efficient approximate analytical technique for the fractional model describing the solid tumor invasion 描述实体肿瘤侵袭的分数模型的高效近似分析技术

IF 3.1 3区物理与天体物理

Frontiers in Physics Pub Date : 2024-07-04 DOI: 10.3389/fphy.2024.1294506

H. B. Chethan, Rania Saadeh, D. G. Prakasha, Ahmad Qazza, Naveen S. Malagi, M. Nagaraja, Deepak Umrao Sarwe

引用次数: 0

Cascaded multiplier-free implementation of adaptive anti-jamming filter based on GNSS receiver 基于全球导航卫星系统接收器的无级联乘法器自适应抗干扰滤波器的实现

IF 3.1 3区物理与天体物理

Frontiers in Physics Pub Date : 2024-07-03 DOI: 10.3389/fphy.2024.1404236

Jie Song, Lei Chen, Zukun Lu, Baiyu Li, Zhe Liu, Zhihao Xue, Guangfu Sun, Wenhong Liu

{"title":"Cascaded multiplier-free implementation of adaptive anti-jamming filter based on GNSS receiver","authors":"Jie Song, Lei Chen, Zukun Lu, Baiyu Li, Zhe Liu, Zhihao Xue, Guangfu Sun, Wenhong Liu","doi":"10.3389/fphy.2024.1404236","DOIUrl":"https://doi.org/10.3389/fphy.2024.1404236","url":null,"abstract":"Evaluating the computational complexity is critical for assessing the time-domain anti-jamming performance of GNSS receivers. The multiplier is the core component that contributes to the computational complexity in time-domain anti-jamming. However, current algorithms aimed at reducing the complexity of time-domain anti-jamming typically concentrate on shortening the filter length, which fails to address the high computational complexity introduced by the use of multipliers. This paper introduces a cascaded multiplier-free approach for implementing time-domain anti-jamming in navigation receivers. We propose a numerical power decomposition technique based on optimal Canonical Signed Digit coding and coefficient decomposition. By substituting the multiplier with minimal adder and shift operations, the computational complexity of the anti-jamming filter with a high quantization bit-width can be considerably decreased. An optimization strategy is presented, and the low-complexity multiplier-free technique is applied to the time-domain anti-jamming filter. Compared to the traditional Canonical Signed Digit multiplier-free technique, our method can reduce the components required for a 12-bit quantization anti-interference filter by one adder, 20 shift operations, and five coded word lengths, while maintaining a pseudo-range measurement deviation below 0.27 ns.","PeriodicalId":12507,"journal":{"name":"Frontiers in Physics","volume":"28 1","pages":""},"PeriodicalIF":3.1,"publicationDate":"2024-07-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141511148","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Frontiers | The coupled awareness-epidemic dynamics with individualized self-initiated awareness in multiplex networks 前沿 | 多路网络中个体化自发意识的耦合意识-流行动力学

IF 3.1 3区物理与天体物理

Frontiers in Physics Pub Date : 2024-07-02 DOI: 10.3389/fphy.2024.1437341

Wei Zhang, Yixuan Ye, Zongyi Li, Jiajun Xian, Teng Wang, Dandan Liu, Die Hu, Ming Liu

{"title":"Frontiers | The coupled awareness-epidemic dynamics with individualized self-initiated awareness in multiplex networks","authors":"Wei Zhang, Yixuan Ye, Zongyi Li, Jiajun Xian, Teng Wang, Dandan Liu, Die Hu, Ming Liu","doi":"10.3389/fphy.2024.1437341","DOIUrl":"https://doi.org/10.3389/fphy.2024.1437341","url":null,"abstract":"The outbreak of an epidemic often stimulates the generation of public awareness about epidemic prevention. This heightened awareness encourages individuals to take proactive protective measures, thereby curbing the transmission of the epidemic. Previous research commonly adopts an assumption that each individual has the same probability of awakening self-protection awareness after infection. However, in the real-world process, different individuals may generate varying awareness responses due to the differences in the amount of information received. Therefore, in this study, we first propose a coupled awareness-epidemic spreading model, where the self-initiated awareness of each individual can be influenced by the number of aware neighbors. Subsequently, we develop a Micro Markov Chain Approach to analyze the proposed model and explore the effects of different dynamic and structural parameters on the coupled dynamics. Findings indicate that individual awareness awakening can effectively promote awareness diffusion within the proposed coupled dynamics and inhibit epidemic transmission. Moreover, the influence of awareness diffusion on epidemic transmission exhibits a metacritical point, from which the epidemic threshold increases with the increase in the awareness diffusion probability. The research findings also suggest that the increase in the average degree of virtual-contact networks can reduce the value of the metacritical point, while the change in the average degree of the physical-contact networks does not affect the metacritical point. Finally, we conduct extensive experiments on four real networks and obtain results consistent with the above conclusions. The systematic research findings of this study provide new insights for exploring the interaction between individual awareness and epidemic transmission in the real world.","PeriodicalId":12507,"journal":{"name":"Frontiers in Physics","volume":"46 1","pages":""},"PeriodicalIF":3.1,"publicationDate":"2024-07-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141883631","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A review of curved crease origami: design, analysis, and applications 弧形折痕折纸综述：设计、分析和应用

IF 3.1 3区物理与天体物理

Frontiers in Physics Pub Date : 2024-07-01 DOI: 10.3389/fphy.2024.1393435

Keyao Song, Han Li, Yang Li, Jiayao Ma, Xiang Zhou

{"title":"A review of curved crease origami: design, analysis, and applications","authors":"Keyao Song, Han Li, Yang Li, Jiayao Ma, Xiang Zhou","doi":"10.3389/fphy.2024.1393435","DOIUrl":"https://doi.org/10.3389/fphy.2024.1393435","url":null,"abstract":"Origami structures with morphing behaviours and unique mechanical properties are useful in aerospace deployable structures, soft robots and mechanical metamaterials. Curved-crease origami, as one of the variants in the origami family, has a curve that connects two vertices as a crease compared to the straight crease counterpart. This feature couples the crease folding and facet bending during the folding process, providing versatile design space of mechanical metamaterials with tunable stiffness, multi-stability properties and morphing behaviours. However, current design techniques are mostly for simple geometries with intuitive construction, the modelling technique focuses on using the conventional finite element method, and the intrinsically complex geometries make specimens difficult to manufacture, which further hinders the development of curved-crease origami structures. Thus, it is valuable to review the state-of-the-art in curved-crease origami. This paper presents a review on the design methodology, analytical methods, and applications of curved-crease origami over the years, discusses their strengths, identifies future challenges and provides an outlook for the future development of the curved-crease origami concept.","PeriodicalId":12507,"journal":{"name":"Frontiers in Physics","volume":"30 1","pages":""},"PeriodicalIF":3.1,"publicationDate":"2024-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141511103","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A survey on deep learning in medical ultrasound imaging 医学超声成像中的深度学习调查

IF 3.1 3区物理与天体物理

Frontiers in Physics Pub Date : 2024-07-01 DOI: 10.3389/fphy.2024.1398393

Ke Song, Jing Feng, Duo Chen

引用次数: 0