检索结果-内蒙古大学图书馆

Advancing EEG-based brain-computer interface technology via PEDOT:PSS electrodes

MATTER 2024年第9期7卷 2859-2895页

作者： Li, Yang Gu, Yuzhe Teng, Junchen Zheng, Shuwen Pang, Yuncong Lu, Xiaomin Liu, Baoguang Liu, Shujuan Zhao, Qiang Nanjing Univ Posts & Telecommun NJUPT Coll Elect & Opt Engn Coll Flexible Elect Future Technol Nanjing 210023 Peoples R China Nanjing Univ Posts & Telecommun NJUPT Inst Adv Mat IAM State Key Lab Organ Elect & Informat Displays Nanjing 210023 Peoples R China Nanjing Univ Posts & Telecommun NJUPT Inst Adv Mat IAM Jiangsu Key Lab Biosensors Nanjing 210023 Peoples R China

Brain-computer interface (BCI) technology enables innovative communication between the brain and machines, extending its impact beyond healthcare to various daily activities. Electrodes play a pivotal role in electroencephalogram (EEG)-based BCIs, serving as the crucial link between brain electrical activity and technology for signal acquisition and transmission. The conducting polymer poly(3,4-ethylenedioxythiophene):poly(styrenesulfonic acid) (PEDOT:PSS) has emerged as an optimal material for electrode modification due to its exceptional electron-ion conductivity and biocompatibility. However, ensuring high-quality and stable signal transmission in BCIs requires multifaceted efforts. This review comprehensively explores BCI construction techniques and applications, covering performance metrics, established electrode types, operational principles, and recent advancements in PEDOT:PSSbased electrodes. System design aspects, including connection methods, circuit design, and algorithms, are detailed, along with explanations of prevalent EEG-based BCI tests-P300, motor imagery, and steady-state visual evoked potential. The conclusion outlines specific BCI applications and briefly addresses the prospects and challenges of this emerging technology.

关键词： brain-computer interface EEG electrodes PEDOT:PSS system design processing algorithms

来源：评论

学校读者我要写书评

暂无评论

The Influence of Random Internal Waves on the Characteristics of a Horizontal Antenna in a Shallow Sea

引用

ACOUSTICAL PHYSICS 2023年第5期69卷 677-686页

作者： Raevskii, M. A. Burdukovskaya, V. G. Russian Acad Sci Inst Appl Phys Nizhnii Novgorod 603950 Russia

The effect of random internal waves on the gain and pattern of a horizontal antenna array in a shallow sea has been investigated. An algorithm for calculating the correlation matrix of the point source field at the grating aperture is proposed. The antenna gain is analyzed for different spatial processing methods: the beam forming method, the optimal linear processing method, and the optimal quadratic processing method. The effect of internal waves on the directivity pattern is described by the dispersion of the angular response of the grating. Numerical simulation results are presented for a model summer-type waveguide and an exponential Brunt-Vaisala frequency profile. The empirical internal wave spectrum proposed earlier from the SWARM95 experiment is used. The dependences of the antenna array characteristics on the number of its elements, orientation with respect to the source, radiation frequency, and the acoustic characteristics of the bottom are analyzed.

关键词： acoustic waveguide internal waves shallow sea field decorrelation antenna array processing algorithms

来源：评论

学校读者我要写书评

暂无评论

Telemonitoring of Human Biomedical and Biomechanical Signals

引用

Journal of Mobile Multimedia 2023年第3期19卷 877-896页

作者： Shevchuk, Bohdan Ivakhiv, Orest Zastavnyy, Oleg Geraimchuk, Mykhaylo Glushkov Institute of Cybernetics National Academy of Sciences of Ukraine 40 Academician Glushkov av. Kyiv 03187 Ukraine Lviv Polytecnic National University 12 Bandera str. Lviv 79013 Ukraine Western Ukrainian National University 3 Peremoga Square Ternopil 46004 Ukraine National Technical University of Ukraine “Igor Sikorsky Kyiv Polytechnic Institute” 37 Peremohy av. Kyiv 03056 Ukraine

Methodological and algorithmic bases of the local-regional and global wireless networks operation for functional states of people long-term monitoring are offered. The construction of efficient wireless networks and portable devices for monitoring biological objects is proposed. High-speed algorithms for processing, encoding, encrypting and transmitting samples of monitoring signals and video data frames using a signaling approach are proposed. The express analysis of monitoring signal samples is offered. The described methods of effective long-term monitoring of functional states of biological objects using wireless networks, algorithms of operational processing, coding, encryption and express analysis of signals are the basis of information technology of wide application. The technology is focused on evidence-based monitoring of the condition of operators of various human-machine complexes, systems, vehicles, aviation and space systems, monitoring of athletes and healthy people in order to prevent various diseases. © 2023 River Publishers.

关键词： data compression and protection express signal analysis object systems processing algorithms signal sample encoding transmission of high-capacity information packets Wireless monitoring networks

来源：评论

学校读者我要写书评

暂无评论

Spatially Resolved Fast-Time Vibrometry Using Ultrawideband FMCW Radar Systems

引用

IEEE TRANSACTIONS ON MICROWAVE THEORY AND TECHNIQUES 2021年第1期69卷 1082-1095页

作者： Piotrowsky, Lukas Pohl, Nils Ruhr Univ Bochum Inst Integrated Syst D-44801 Bochum Germany

Highly accurate vibrometry and ranging are important topics in the industrialized economy. Wherever optical measurement technology fails due to its high prices and vulnerability within harsh environments, millimeter-wave (mmWave) radar technology is well suited. This article introduces a signal processing chain for ultrawideband frequency-modulated continuous-wave (FMCW) radar. It uses fast-time measurement to evaluate the instantaneous phase, thus allowing for spatially resolved sensing of multiple simultaneously vibrating radar targets, faster than the chirp rate. In order to accomplish this, a sophisticated error model and a calibration scheme were derived. We used three FMCW radar systems covering a broad range of the mmWave spectrum to demonstrate the signal processing approach. In contrast to the commonly used slow-time measurement principle, the highest detectable frequency was improved from 55 Hz to at least 16 kHz, which is the upper limit of the audio range. Up to 10 kHz could be measured with an underlying large-scale motion of 0.4 m/s, while the vibration displacement was at a minimum of 30 nm.

关键词： Radar Radar measurements Biomedical measurement Vibration measurement Radio frequency Distance measurement Ultra wideband radar Displacement measurement distance measurement estimation error millimeter-wave (mmWave) radar processing algorithms radar measurements radar theory ultrawideband radar vibration measurement vibrometers

来源：评论

学校读者我要写书评

暂无评论

Neue diagnostische Verfahren in der Computertomographie der Wirbelsäule

Die Wirbelsäule

引用

Die Wirbelsäule 2024年第4期08卷 228-233页

作者： Thomas J. Vogl Philipp Reschke Christian Booz Klinik für Radiologie und Nuklearmedizin Universitätsklinikum Frankfurt Frankfurt am Main

Dual-Energy CT was integrated into clinical practice in 2005, introducing new applications in spinal imaging diagnostics through dual- and multi-material differentiation. These applications include the measurement of bone mineral density, visualization of bone marrow and soft tissue edema, and depiction of disc extrusions. The computation of virtual monoenergetic images (VMI) from dual-energy CT data allows image reconstruction at various keV levels. Low-energy VMI reconstructions in dual-energy CT increases contrast resolution but results in increased image noise. This enhanced contrast resolution enables improved depiction of soft tissue tumors infiltrating the spinal canal. High-energy VMI reconstructions in dual-energy CT are used to minimize beam hardening artifacts, for instance, in spinal fusion. Iterative image post-processing algorithms reduce image noise. The photon-counting CT was introduced to the market in 2021 and offers numerous advantages over previous generations, including improved spatial resolution, reduced radiation dose and the ability to capture multi-energy datasets at various keV levels with a single X-ray tube. AI applications can assist radiologists in localizing and identifying vertebral bodies, detecting vertebral fractures, and locating malignancy-suspect bone lesions.

关键词： Computertomographie Photon Counting CT Dual Energy CT Bildnachverarbeitungsalgorithmen Bildgebung der Wirbelsäule computed tomography photon counting CT dual energy CT image post processing algorithms imaging of the spine

来源：评论

学校读者我要写书评

暂无评论

Preprocessing algorithms of Fuzzy Medical Data of Patient Examinations 21

Preprocessing Algorithms of Fuzzy Medical Data of Patient Ex...

引用

21st International Conference on Complex Systems - Control and Modeling Problems (CSCMP)

作者： Kolodenkova, Anna Novokshenov, Sergey Ketsko, Yuriy Samara State Tech Univ Inst Automat & IT Samara Russia Samara State Med Univ ICU Clin Univ Samara Russia

ISBN: (纸本)9781728167008

This research work proposes a novel algorithms of processing fuzzy data got while medical examinations of patients in the hospital. These algorithms are based on the use of a set of binary masks of a set of examination parameter states, classified by parameter sets for each type of medical examination. The amount of medical examinations for patient in a hospital differs by a more comprehensive set of examinations. And the amount of fuzzy data generated is significantly higher than in outpatient diagnostics. To solve problems associated with getting a clinical diagnosis, predicting the dynamics of a patient's clinical condition and the outcome of a patient's treatment based on medical screenings and examinations the specific algorithms are necessary both at the initial stage and during treatment. These algorithms are coding / decoding, classification and building of structured interconnected models and states of the diagnostic system throughout the entire patient treatment process. A diagnostic system is a set of methods, knowledge and algorithms for solving the problem of decision support in the clinical diagnostics of patients' diseases in a hospital or outpatient clinic. The methods and algorithms presented in the article allow pre-processing fuzzy data of medical examinations of patients in order to optimize and further use fuzzy cognitive models and artificial intelligence methods. Also a method for the classification of medical examination parameters is proposed for applying the proposed algorithms.

关键词： fuzzy data medical examination differential diagnostics processing algorithms fuzzy production rules

来源：评论

学校读者我要写书评

暂无评论

Electromagnetic Torso Scanning: A Review of Devices, algorithms, and Systems

BIOSENSORS-BASEL

引用

BIOSENSORS-BASEL 2021年第5期11卷 135页

作者： Ahdi Rezaeieh, Sasan Darvazehban, Amin Janani, Azin S. Abbosh, Amin M. Univ Queensland Sch ITEE Brisbane Qld 4072 Australia

The past decade has witnessed a surge into research on disruptive technologies that either challenge or complement conventional thoracic diagnostic modalities. The non-ionizing, non-invasive, compact, and low power requirements of electromagnetic (EM) techniques make them among the top contenders with varieties of proposed scanning systems, which can be used to detect wide range of thoracic illnesses. Different configurations, antenna topologies and detection or imaging algorithms are utilized in these systems. Hence, to appreciate their progress and assess their potential, a critical review of EM thoracic scanning systems is presented. Considering the numerous thoracic diseases, such as fatty liver disease, lung cancer, respiratory and heart related complications, this paper will exclusively focus on torso scanning systems, tracing the early foundation of research that studied the possibility of using EM waves to detect thoracic diseases besides exploring recent progresses. The advantages and disadvantages of proposed systems and future possibilities are thoroughly discussed.

关键词： torso scanning antennas processing algorithms electromagnetic imaging

来源：评论

学校读者我要写书评

暂无评论

Using FMCW Radar for Spatially Resolved Intra-Chirp Vibrometry in the Audio Range

Using FMCW Radar for Spatially Resolved Intra-Chirp Vibromet...

引用

IEEE/MTT-S International Microwave Symposium (IMS)

作者： Piotrowsky, Lukas Siska, Jan Schweer, Christian Pohl, Nils Ruhr Univ Bochum Bochum Germany

ISBN: (纸本)9781728168159

Many applications require low-cost vibration monitoring. Here we present a robust method for spatially resolved non-contact vibrometry with frequency modulated continuous wave (FMCW) radar sensors. Our newly found technique uses an instantaneous phase evaluation, thus allows for measuring faster than the radar sensors chirp rate. We verified our theory with experiments using an 80 GHz highly synchronous ultra-wideband mmWave radar system. In this way, we reached sub-micrometer measurement precision with vibration frequencies up to 16 kHz. Furthermore, we showed that our method enables a clear separation of various vibrating radar targets.

关键词： Displacement measurement millimeter wave radar processing algorithms radar measurements radar theory signal ultra wideband radar vibration measurement vibrometers

来源：评论

学校读者我要写书评

暂无评论

INSAR MISSION-LEVEL PRODUCTS ON DEMAND - DO WE NEED RANGE-DOPPLER? 38

INSAR MISSION-LEVEL PRODUCTS ON DEMAND - DO WE NEED RANGE-DO...

引用

38th IEEE International Geoscience and Remote Sensing Symposium (IGARSS)

作者： Zebker, Howard A. Stanford Univ Stanford CA 94305 USA

ISBN: (纸本)9781538671504

InSAR time series analysis of deformation fields, a goal of many modern radar systems, almost always starts with processed range-Doppler single look complex (SLC) radar images. These images are precisely coregistered and pairwise phase differences form the interferograms. Computing coregistered SLCs directly in a desired geometry saves significant data storage and readily produces data products that are easy to analyze in coordinate systems that are well matched to a desired application. Here we demonstrate InSAR data products created using a backprojection algorithm that skips the range-Doppler, coregistration, and elevation compensation steps. Implementing this in an on-demand system saves not only on the volume of products that must be computed, stored, and delivered, it further greatly simplifies analysis by the end user and opens up InSAR techniques to a wider group of applications.

关键词： InSAR Data Products processing algorithms

来源：评论

学校读者我要写书评

暂无评论

DICOM DATA processing OPTIMIZATION IN MEDICAL INFORMATION SYSTEMS

引用

SCALABLE COMPUTING-PRACTICE AND EXPERIENCE 2018年第2期19卷 189-201页

作者： Golubev, Alexandr Bogatencov, Peter Secrieru, Grigore Res & Educ Networking Assoc Moldova Str Acad 5Off 324 MD-2028 Kishinev Moldova

The problem of storage and visualization of medical images collected by various medical equipment is actual for latest 10 years for every medical institution. On the other hand, access to the medical investigation datasets and solving the problem of personal patient data security is important for scientific community and institutions that require this data. "DICOM Network" project was developed for solving these problems for different actors in the system based on the various customized roles. This article describes the problems and possible solutions for optimization of medical images storing, providing stable and secure access, based on the distributed warehouse for huge volumes of data with different levels of access.

关键词： DICOM Distributed storage system HPC processing algorithms Radiology e-Health

来源：评论

学校读者我要写书评

暂无评论

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案：

请选择收藏分类：

通借通还

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：