检索结果-内蒙古大学图书馆

International Conference on Advances in Biomedical engineering (ICABME)

作者： Roy Abi Zeid Daou Elio Geha Youssef Aoun Ali Hayek Josef Boercsoek Jose Javier Serrano Olmedo Biomedical Engineering department Furn El Chebbak Université La Sagesse Beirut Lebanon Education and Research Center MART Learning Chananir Lebanon Biomedical Technologies Department Faculty of Public Health Lebanese German University Jounieh Lebanon Department Lippstadt 2 Hardware Engineering Marker Allee 76-78 University of Applied Science Hamm-Lippstadt Hamm Department of Computer Architecture and System Programming Faculty of Electrical Engineering /Computer Science University of Kassel Germany Lab of Bioinstrumentation and Nanomedicine Centro de Tecnologia Biomedica Universidad Politecnica de Madrid Spain

Chronic back pain can present a serious health concern, with symptoms that can significantly affect an individual's well-being, mobility, and overall quality of life over an extended period. While chronic back pain may manifest suddenly in some cases, it often develops gradually and persists for weeks, and in untreated cases, it can linger for years. Hence, the utilization of assistive devices such as wearable posture-monitoring vests can offer valuable assistance and guidance to users. This research paper is dedicated to the development of a system for detecting, diagnosing, and correcting poor posture, specifically leaning posture. The vest is designed to provide users with visual, auditory, and tactile cues to help them address this issue, thereby reducing the risk associated with leaning. Additionally, an integrated electrical box has been designed to consolidate all components directly onto the main board in a secure enclosure. This box also displays the daily count of instances where the user has leaned. This system is characterized by its electrical safety, portability, compactness, comfort, and affordability. A comprehensive analysis of the system's performance has been conducted with a meticulous evaluation of accuracy. Each component of the system has undergone successful testing, and the system as a whole is currently in the testing phase. The results of these tests have indicated a lack of faulty errors and have demonstrated outstanding accuracy and detection rates. Over 100 individuals of varying ages, genders, and BMI categories were involved in testing, with each person wearing the device for an average of six hours. The accuracy rate achieved was 98.85%, with an average of 54.35 instances of poor posture detected per participant.

关键词：

来源：评论

学校读者我要写书评

暂无评论

Safe Digital Stabilization of Nonlinear Systems with an Application to Glucose Control

Safe Digital Stabilization of Nonlinear Systems with an Appl...

引用

IEEE Conference on Decision and Control

作者： Alessandro Borri Mario Di Ferdinando Pierdomenico Pepe Consiglio Nazionale delle Ricerche (IASI-CNR) Istituto di Analisi dei Sistemi ed Informatica “A. Ruberti” Rome Italy Department of Information Engineering Computer Science and Mathematics Center of Excellence for Research DEWS University of L'Aquila L'Aquila Italy

In this paper, we propose a framework for the semiglobal practical safe stabilization of nonlinear continuous-time systems based on limited amount of information. This approach requires the availability of a continuous-time control law ensuring global asymptotic stability and a robust safety condition. Following an emulation-based approach, we introduce time sampling and quantizations on the input and state signals. We show that sufficiently high sampling frequency and small quantization error guarantee safety preservation and practical state stabilization to an arbitrarily small neighborhood of the origin while keeping the state within a safe region during the whole system evolution, which is essential in safety-critical applications. Numerical simulations on a glucose control problem in a non-ideal setting show the effectiveness of the approach.

关键词：

来源：评论

学校读者我要写书评

暂无评论

Optimization on multi-user physical layer security of intelligent reflecting surface-aided VLC

arXiv

引用

arXiv 2022年

作者： Sun, Shiyuan Yang, Fang Song, Jian Han, Zhu Department Of Electronic Engineering Beijing National Research Center For Information Science And Technology Tsinghua University Beijing100084 China Key Laboratory Of Digital TV System Of Guangdong Province And Shenzhen City Research Institute Of Tsinghua University In Shenzhen Shenzhen518057 China Department Of Electrical And Computer Engineering The University Of Houston HoustonTX77004 United States Department Of Computer Science And Engineering Kyung Hee University Seoul446-701 Korea Republic of

This letter investigates physical layer security in intelligent reflecting surface (IRS)-aided visible light communication (VLC). Under the point source assumption, we first elaborate the system model in the scenario with multiple legitimate users and one eavesdropper, where the secrecy rate maximization problem is transformed into an assignment problem by objective function approximation. Then, an iterative Kuhn-Munkres algorithm is proposed to optimize the transformed problem, and its computational complexity is in the second-order form of the numbers of IRS units and transmitters. Moreover, numerical simulations are carried out to verify the approximation performance and the VLC secrecy rate improvement by IRS. Copyright © 2022, The Authors. All rights reserved.

关键词： Combinatorial optimization

来源：评论

学校读者我要写书评

暂无评论

Large Scale Deterministic Creation of Single Photon Emitters in Silicon Nitride Nanopillars

Large Scale Deterministic Creation of Single Photon Emitters...

引用

Conference on Lasers and Electro-Optics (CLEO)

作者： Samuel Peana Omer Yesilyurt Vahagn Mkhitaryan Alexander Senichev Zachariah O. Martin Alexei S. Lagutchev Alexandra Boltasseva Vladimir M. Shalaev Birck Nanotechnology Center Purdue University West Lafayette IN USA School of Electrical and Computer Engineering Purdue University West Lafayette IN USA Purdue Quantum Science and Engineering Institute Purdue University West Lafayette IN USA a National Quantum Information Science Research Center of the U.S. Department of Energy Quantum Science Center Oak Ridge TN USA

We demonstrated large scale deterministic creation of single photon emitters in annealed silicon nitride on silicon oxide pillars. The estimated single photon emitter yield is approximately 50% with a lateral accuracy... 详细信息

ISBN: (数字)9781957171050

ISBN: (纸本)9781665466660

关键词： Laser theory Stimulated emission Optical device fabrication Silicon nitride Plasmons Silicon Nanostructures

来源：评论

学校读者我要写书评

暂无评论

Quantum simulation of Fermi-Hubbard model based on transmon qudit interaction

arXiv

引用

arXiv 2024年

作者： Vezvaee, Arian Earnest-Noble, Nathan Najafi, Khadijeh Department of Electrical & Computer Engineering Center for Quantum Information Science & Technology University of Southern California Los AngelesCA90089 United States IBM Quantum IBM T.J. Watson Research Center Yorktown HeightsNY10598 United States IBM Quantum Research Triangle Park NC27709 United States MIT-IBM Watson AI Lab CambridgeMA02142 United States

The Fermi-Hubbard model, a fundamental framework for studying strongly correlated phenomena could significantly benefit from quantum simulations when exploring non-trivial settings. However, simulating this problem requires twice as many qubits as the physical sites, in addition to complicated on-chip connectivities and swap gates required to simulate the physical interactions. In this work, we introduce a novel quantum simulation approach utilizing qudits to overcome such complexities. Leveraging on the symmetries of the Fermi-Hubbard model and their intrinsic relation to Clifford algebras, we first demonstrate a Qudit Fermionic Mapping (QFM) that reduces the encoding cost associated with the qubit-based approach. We then describe the unitary evolution of the mapped Hamiltonian by interpreting the resulting Majorana operators in terms of physical single- and two-qudit gates. While the QFM can be used for any quantum hardware with four accessible energy levels, we demonstrate the specific reduction in overhead resulting from utilizing the native Controlled-SUM gate (equivalent to qubit CNOT) for a fixed-frequency ququart transmon. We further transpile the resulting two transmon-qudit gates by demonstrating a qudit operator Schmidt decomposition using the Controlled-SUM gate. Finally, we demonstrate the efficacy of our proposal by numerical simulation of local observables such as the filling factor and Green’s function for various Trotter steps. The compatibility of our approach with different qudit platforms paves the path for achieving quantum advantage in simulating non-trivial quantum many-body systems. © 2024, CC BY.

关键词： Hubbard model

来源：评论

学校读者我要写书评

暂无评论

Unconventional ferroelectric domain switching dynamics in CuInP2S6 from first principles

引用

Physical Review B 2023年第2期108卷 024305-024305页

作者： Ri He Hua Wang Fucai Liu Shi Liu Houfang Liu Zhicheng Zhong Key Laboratory of Magnetic Materials Devices and Zhejiang Province Key Laboratory of Magnetic Materials and Application Technology Ningbo Institute of Materials Technology and Engineering Chinese Academy of Sciences Ningbo 315201 China School of Micro-Nano Electronics Hangzhou Global Scientific and Technological Innovation Center Zhejiang University Hangzhou 310027 China School of Optoelectronic Science and Engineering University of Electronic Science and Technology of China Chengdu 611731 China Yangtze Delta Region Institute (Huzhou) University of Electronic Science and Technology of China Huzhou 313001 China Key Laboratory for Quantum Materials of Zhejiang Province Department of Physics School of Science Westlake University Hangzhou 310024 China Institute of Natural Sciences Westlake Institute for Advanced Study Hangzhou 310024 China Institute of Microelectronics and Beijing National Research Center for Information Science and Technology (BNRist) Tsinghua University Beijing 100084 China China Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of Sciences Beijing 100049 China

The switching dynamics of ferroelectric materials is a crucial intrinsic property which directly affects the operation and performance of ferroelectric devices. In conventional ferroelectric materials, the typical ferroelectric switching mechanism is governed by a universal process of domain-wall motion. However, recent experiments indicate that van der Waals ferroelectric CuInP2S6 possesses anomalous polarization switching dynamics under an electric field. It is important to understand the switching dynamics, but it remains theoretically unexplored in CuInP2S6 due to the lack of description of its order-disorder phase transition characteristics by density functional theory. Here we employ a machine-learning potential trained from the first-principles density functional theory dataset to conduct large-scale atomistic simulations of temperature-driven order-disorder ferroelectric phase transition in CuInP2S6. Most importantly, it is found that the electric-field-driven polarization switching in CuInP2S6 is mediated by a single Cu dipole flip rather than a conventional domain-wall-motion mechanism. This intrinsic unconventional switching behavior can be attributed to the competition between the energy barrier of domain-wall motion and single-dipole flip.

关键词： Ferroelectricity 2-dimensional systems Deep learning Density functional theory

来源：评论

学校读者我要写书评

暂无评论

Performance of magnetic dipole contribution on electromagnetic Ellis tetra hybrid nanofluid with the applications of surface tension gradient: A Xue model exploration

引用

International Journal of Thermofluids 2024年 24卷

作者： Abbas, Munawar Marzouki, Riadh Ameen, Hawzhen Fateh M. Dilsora, Abduvalieva Younis, Jihad Akgül, Ali Department of Mathematics The Islamia University of Bahawalpur Bahawalpur63100 Pakistan Department of Chemistry College of Science King Khalid University P.O. Box 9004 Abha61413 Saudi Arabia Fuel and Energy Techniques Engineering College of Oil and Gas Techniques Engineering Northern Technical University Kirkuk Iraq Department of Petroleum Engineering College of Engineering Knowledge University Erbil Iraq Department of Mathematics and Information Technologies Tashkent State Pedagogical University Bunyodkor avenue 27 Tashkent100070 Uzbekistan Department of Mathematics Aden University P.O.Box 6014 Aden Yemen Siirt University Art and Science Faculty Department of Mathematics Siirt56100 Turkey Department of Computer Engineering Biruni University Istanbul Topkapı34010 Turkey Near East University Mathematics Research Center Department of Mathematics Near East Boulevard PC: 99138 Nicosia /Mersin 10 Turkey

The objective of this work is to examine the enhancement of thermal energy transfer in Ellis THNF (tetra hybrid nanofluid) flow with magnetic dipole permits on a vertical surface. Using the Xue thermal conductivity model, the THNF (tetra hybrid nanofluid) is organized according to the diffusion of TNPs (tetra nanoparticles) (Mgo, Cu, Ag, and TiO2)in the engine oil liquid. The flow, mass and heat transportation have been observed in the occurrence of the Marangoni convection impact and CattaneoChristove mass and heat flux model. In biomedical engineering, the model can also be used for targeted drug delivery and hyperthermia treatment, where precise temperature and fluid flow control are essential. Gradient-driven surface tension in order to enhance the possibility for enhancing surface-driven flows in microfluidic devices and material processing techniques, such as welding and crystal formation, where regulated mass transport and consistent temperature distribution are crucial, Marangoni convection is included. Using the Bvp4c, the obtained dimensionless equations are mathematically resolved. It is found that a magnetic dipole significantly increases the generation of the thermal energy field and exhibits an opposing trend with respect to the flow profile. The addition Marangoni convection factor increases the velocity distribution while decline the solutal and thermal distribution. The heat transfer rate is increased by 19.71% for the tetra hybrid nanofluid and 13.43% for the trihybrid nanofluid when the nanoparticles volume fraction is improved from 0.01 to 0.04. © 2024 The Authors

关键词： Hyperthermia therapy

来源：评论

学校读者我要写书评

暂无评论

Observation of Photonic Chiral Flatbands

arXiv

引用

arXiv 2024年

作者： Choi, Minho Alù, Andrea Majumdar, Arka Department of Electrical and Computer Engineering University of Washington SeattleWA98195 United States Photonics Initiative Advanced Science Research Center City University of New York New YorkNY10031 United States Physics Program Graduate Center City University of New York New YorkNY10031 United States Department of Physics University of Washington SeattleWA98195 United States

Distinct selectivity to the spin angular momenta of photons have garnered significant attention in recent years, for their relevance in basic science and for imaging and sensing applications. While nonlocal metasurfaces with strong chiral responses to the incident light have been reported, these responses are typically limited to a narrow range of incident angles. In this study, we demonstrate a nonlocal metasurface that showcases strong chirality, characterized by circular dichroism larger than 0.6, over a wide range of incident angles ±5o. Its quality factor, circular dichroism and resonant frequency can be optimized by design. These findings pave the way to further advance the development of valley-selective optical cavities and augmented reality applications. Copyright © 2024, The Authors. All rights reserved.

关键词： Natural frequencies

来源：评论

学校读者我要写书评

暂无评论

Centrifugal Microfluidic Based Painless Blood Sample Collection for Hematocrit Measurement

Centrifugal Microfluidic Based Painless Blood Sample Collect...

引用

Biomedical engineering International Conference (BMEiCON)

作者： Santi Rattanavarin Thanapat Sangkharat Ekachai Juntasaro Witsaroot Sripumkhai Pattaraluck Pattamang Norabadee Ranron Numfon Khemthongcharoen Chompunoot Sinthupibulyakit Chamras Promptmas Chayapitcha Saesue Jiraskul Udarwudhipong Wutthinan Jeamsaksiri Department of Production and Robotics Engineering Faculty of Engineering King Mongkut’s University of Technology North Bangkok (KMUTNB) Bangkok Thailand Mechanical Engineering Simulation and Design Group (MESD) Sirindhorn International Thai-German Graduate School of Engineering (TGGS) King Mongkut’s University of Technology North Bangkok (KMUTNB) Bangkok Thailand Thai Microelectronics Center (TMEC) National Electronics and Computer Technology Center (NECTEC) National Science and Technology Development Agency (NSTDA) Chachoengsao Thailand Infrastructure Development Division (IDD) National Science and Technology Development Agency (NSTDA) Pathum Thani Thailand National Electronics and Computer Technology Center (NECTEC) National Science and Technology Development Agency (NSTDA) Pathum Thani Thailand Faculty of Medical Technology Huachiew Chalermprakiet University Samut Prakan Thailand Department of Biomedical Engineering Faculty of Engineering Mahidol University Nakhon Pathom Thailand

This work demonstrates a centrifugal microfluidic chip design for painless blood collection and hematocrit measurement. The fluid channel in the microfluidic chip was fabricated using a laser-cutting method. An optimal dimension of the negative pressure chamber was designed to control the maximum sample volume obtained for further hematocrit examination. The estimated blood sample of 20 µl could be obtained based on the negative pressure driven by finger press actuation on the negative pressure chamber of the microfluidic chip. The repeatability of blood volume collection evaluated by a laboratory technician was 21.126±0.001 µl with a coefficient of variation (CV) of 5.32%. The sample volume used in this centrifugal microfluidic chip was around three times lower than that used in the standard method. Pack red cell preparation for hematocrit examination in the microfluidic chip could be achieved using a centrifugation speed around 2.4 times lower than that used in the standard method. The hematocrit examination by our centrifugal microfluidic chip and the standard method was 41.75±0.77 (1.84 %CV), and 41.5±0.71 (1.7 %CV), respectively. The results showed that the hematocrit measurements in our centrifugal microfluidic chip were compatible with those measured by the standard method.

关键词：

来源：评论

学校读者我要写书评

暂无评论

Online Target Speaker Voice Activity Detection for Speaker Diarization

arXiv

引用

arXiv 2022年

作者： Wang, Weiqing Lin, Qingjian Li, Ming Department of Electrical & Computer Engineering Duke University DurhamNC27708 United States Data Science Research Center Duke Kunshan University Kunshan 215316 China AI Lab Lenovo Research Beijing100085 China

This paper proposes an online target speaker voice activity detection system for speaker diarization tasks, which does not require a priori knowledge from the clustering-based diarization system to obtain the target speaker embeddings. First, we employ a ResNet-based front-end model to extract the frame-level speaker embeddings for each coming block of a signal. Next, we predict the detection state of each speaker based on these frame-level speaker embeddings and the previously estimated target speaker embedding. Then, the target speaker embeddings are updated by aggregating these frame-level speaker embeddings according to the predictions in the current block. We iteratively extract the results for each block and update the target speaker embedding until reaching the end of the signal. Experimental results show that the proposed method is better than the offline clustering-based diarization system on the AliMeeting dataset. Copyright © 2022, The Authors. All rights reserved.

关键词： Embeddings

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：