检索结果-内蒙古大学图书馆

Deep learning radiomics for assessment of gastroesophageal varices in people with compensated advanced chronic liver disease

学校读者我要写书评

暂无评论

arXiv 2023年

作者： Wang, Lan He, Ruiling Zhao, Lili Wang, Jia Geng, Zhengzi Ren, Tao Zhang, Guo Zhang, Peng Tang, Kaiqiang Gao, Chaofei Chen, Fei Zhang, Liting Zhou, Yonghe Li, Xin He, Fanbin Huan, Hui Wang, Wenjuan Liang, Yunxiao Tang, Juan Ai, Fang Wang, Tingyu Zheng, Liyun Zhao, Zhongwei Ji, Jiansong Liu, Wei Xu, Jiaojiao Liu, Bo Wang, Xuemei Zhang, Yao Yan, Qiong Lv, Muhan Chen, Xiaomei Zhang, Shuhua Wang, Yihua Liu, Yang Yin, Li Liu, Yanni Huang, Yanqing Liu, Yunfang Wang, Kun Su, Meiqin Bian, Li An, Ping Zhang, Xin Qian, Linxue Li, Shao Qi, Xiaolong Institute for TCM-X MOE Key Laboratory of Bioinformatics Bioinformatics Division BNRIST Department of Automation Tsinghua University Beijing China Department of Ultrasound Donggang Branch the First Hospital of Lanzhou University Lanzhou China The First Clinical Medical College of Lanzhou University Lanzhou China Department of Gastroenterology and Hepatology Tianjin Second People's Hospital Tianjin China Department of Ultrasound Beijing Friendship Hospital Capital Medical University Beijing China Department of Ultrasound The People's Hospital of Linxia Linxia China Department of Gastroenterology Hospital of Chengdu Office of People's Government of Tibetan Autonomous Region Sichuan China Department of Gastroenterology The People's Hospital of Guangxi Zhuang Autonomous Region Nanning China Department of Control and Systems Engineering Nanjing University Nanjing China Department of Ultrasound The First Hospital of Lanzhou University Lanzhou China Department of Infectious Diseases The First Hospital of Lanzhou University Lanzhou China Department of Ultrasonography Tianjin Second People's Hospital Tianjin China Department of Infectious Disease Zigong First People's Hospital Zigong China Department of Ultrasound Zigong First People's Hospital Zigong China Department of Gastroscopy Zigong First People's Hospital Zigong China Department of Radiology Key Laboratory of Imaging Diagnosis and Minimally Invasive Intervention Research Fifth Affiliated Hospital of Wenzhou Medical University Lishui China Ultrasound Diagnosis Center Shaanxi Provincial People's Hospital Xi'An China Department of Ultrasound Ditan Hospital Capital Medical University Beijing China Department of Gastroenterology The Affiliated Hospital of Southwest Medical University Luzhou China Department of Ultrasound The Affiliated Hospital of Southwest Medical University Luzhou China Department of Ultrasound North China University of Science and Technology Affiliated Hospital Tangshan China Depar

Objective: Bleeding from gastroesophageal varices (GEV) is a medical emergency associated with high mortality. We aim to construct an artificial intelligence-based model of two-dimensional shear wave elastography (2D-SWE) of the liver and spleen to precisely assess the risk of GEV and high-risk gastroesophageal varices (HRV). Design: A prospective multicenter study was conducted in patients with compensated advanced chronic liver disease. 305 patients were enrolled from 12 hospitals, and finally 265 patients were included, with 1136 liver stiffness measurement (LSM) images and 1042 spleen stiffness measurement (SSM) images generated by 2D-SWE. We leveraged deep learning methods to uncover associations between image features and patient risk, and thus conducted models to predict GEV and HRV. Results: A multi-modality Deep Learning Risk Prediction model (DLRP) was constructed to assess GEV and HRV, based on LSM and SSM images, and clinical information. Validation analysis revealed that the AUCs of DLRP were 0.91 for GEV (95% CI 0.90 to 0.93, p Copyright © 2023, The Authors. All rights reserved.

关键词： Deep learning

Network Parameter Generation for One-Shot Object Detection

学校读者我要写书评

暂无评论

Network Parameter Generation for One-Shot Object Detection

IEEE International Conference on Unmanned Systems (ICUS)

作者： Kang Wang Jiajia Zhao Yang Wang Shuigeng Zhou Shanghai Key Lab of Intelligent Information Processing and School of Computer Science Fudan University Shanghai China Science and Technology on Complex System Control and Intelligent Agent Cooperation Laboratory Beijing Electro-Mechanical Engineer Institute Beijing China School of Information Engineering Nanchang University China

ISBN: (纸本)9781728137933

Recent object detection models have achieved satisfactory performance by deep learning with large-scale annotated datasets. However, these models often perform poorly when the training examples are not sufficient enough, especially for one-shot object detection where there is only one training example of each target class. In this paper, we propose a network parameter generation framework for effective one-shot object detection. By leveraging the semantic relationship between the source-domain and the target-domain (new classes), our framework can generate network parameters for the new classes directly. Furthermore, we develop two implementation schemes for this framework: weighting-based parameter generation and regression-based parameter generation. These two schemes use different information to construct the relationship and transfer knowledge from the source-domain to the target-domain. Experiments on the PASCAL-OSCD benchmark show that our methods can significantly boost the performance of one-shot object detection.

关键词： Object detection Detectors Head Training Feature extraction Task analysis Training data

Incubation induced light concentration beyond the diffraction limit for high-resolution glass printing

学校读者我要写书评

暂无评论

arXiv 2020年

作者： Zhang, Haisu Wang, Peng Chu, Wei Yu, Jianping Li, Wenbo Qi, Jia Wang, Zhanshan Cheng, Ya State Key Laboratory of Precision Spectroscopy East China Normal University Shanghai200062 China School of Physics Science and Engineering Tongji University Shanghai200092 China XXL-The Extreme Optoelectromechanics Laboratory School of Physics and Electronic Sciences East China Normal University Shanghai200241 China State Key Laboratory of High Field Laser Physics Shanghai Institute of Optics and Fine Mechanics Chinese Academy of Sciences Shanghai201800 China University of Chinese Academy of Sciences Beijing100049 China School of Physical Science and Technology ShanghaiTech University Shanghai200031 China Collaborative Innovation Center of Extreme Optics Shanxi University Taiyuan030006 China

In the past two decades, tremendous efforts have been exerted to understand and control the delivery of ultrashort laser pulses into various types of transparent materials ranging from glass and crystal to polymer and even bio-materials. This approach opens up the route toward determinative and highly localized modification within the transparent materials, enabling three-dimensional (3D) micromachining of the materials into sophisticated structures and devices with the extreme geometrical flexibility. Owing to the linear diffraction and nonlinear self-focusing effects, the focal volume typically exhibits an asymmetric profile stretching along the longitudinal direction. This effect becomes more severe when focusing deeply into the transparent substrates for printing objects of large heights. In this work a new laser-material interaction regime is identified with the exceptional incubation effect originating from self-regulated multiple-pulse interactions with accumulated material changes. Our finding reveals a focal-volume-invariant modification deeply inside the fused silica glass, in striking contrary to the traditional believes that the geometrical shape of the laser induced modification follows the intensity distribution of the inscription laser. A macro-scale geometrically complex glass sculpture is successfully manufactured with the incubation assisted ultrashort laser inscription at uniform micrometer resolutions in all three dimensions. Copyright © 2020, The Authors. All rights reserved.

关键词： Ultrashort pulses

Max-Min Fair Sensor Scheduling: Game-Theoretic Perspective and Algorithmic Solution

学校读者我要写书评

暂无评论

arXiv 2019年

作者： Wu, Shuang Ren, Xiaoqiang Hong, Yiguang Shi, Ling Department of Electronic and Computer Engineering Hong Kong University of Science and Technology Clear Water Bay Kowloon Hong Kong Access Linnaeus Center School of Electrical Engineering Kth Royal Institute of Technology Stockholm114 28 Sweden Key Laboratory of Systems and Control Institute of Systems Science Chinese Academy of Sciences Beijing100080 China

We consider the design of a fair sensor schedule for a number of sensors monitoring different linear time-invariant processes. The largest average remote estimation error among all processes is to be minimized. We first consider a general setup for the max-min fair allocation problem. By reformulating the problem as its equivalent form, we transform the fair resource allocation problem into a zero-sum game between a "judge" and a resource allocator. We propose an equilibrium seeking procedure and show that there exists a unique Nash equilibrium in pure strategy for this game. We then apply the result to the sensor scheduling problem and show that the max-min fair sensor scheduling policy can be achieved. Copyright © 2019, The Authors. All rights reserved.

关键词： Game theory

On the distribution of the ratio of products of fisher-snedecor f random variables and its applications

学校读者我要写书评

暂无评论

arXiv 2019年

作者： Du, Hongyang Zhang, Jiayi Peppas, Kostas P. Zhao, Hui Ai, Bo Zhang, Xiaodan School of Electronic and Information Engineering Beijing Jiaotong University Beijing100044 China Department of Informatics and Telecommunications University of Peloponnese Tripoli22131 Greece Communication Systems Department EURECOM Sophia Antipolis06410 France State Key Laboratory of Rail Traffic Control and Safety Beijing Jiaotong University Beijing100044 China School of Management Shenzhen Institute of Information Technology Shenzhen518172 China

The Fisher-Snedecor F distribution has been recently proposed as a more accurate and mathematically tractable composite fading model than traditional established models in some practical cases. In this paper, we firstly derive exact closed-form expressions for the main statistical characterizations of the ratio of products of F-distributed random variables, including the probability density function, the cumulative distribution function and the moment generating function. Secondly, simple and tight approximations to the distribution of products and ratio of products of F-distributed random variables are presented. These analytical results can be readily employed to evaluate the performance of several emerging system configurations, including full-duplex relaying systems operating in the presence of co-channel interference and wireless communication systems enhanced with physical-layer security. The proposed mathematical analysis is substantiated by numerically evaluated results, accompanied by equivalent ones obtained using Monte Carlo simulations. Copyright © 2019, The Authors. All rights reserved.

关键词： Random variables

Photoluminescence switching effect in a two-dimensional atomic crystal

学校读者我要写书评

暂无评论

arXiv 2020年

作者： Sun, Zheng Xu, Ke Liu, Chang Beaumariage, Jonathan Liang, Jierui Fullerton‐Shirey, Susan K. Shi, Zhe-Yu Wu, Jian Snoke, David State Key Laboratory of Precision Spectroscopy East China Normal University Shanghai200241 China Department of Physics and Astronomy University of Pittsburgh PittsburghPA15260 United States Department of Chemical and Petroleum Engineering University of Pittsburgh PittsburghPA15260 United States School of Physics and Astronomy Rochester Institute of Technology 14623 United States Microsystems Engineering Rochester Institute of Technology 14623 United States Institute for Advanced Study Tsinghua University Beijing100084 China Collaborative Innovation Center of Extreme Optics Shanxi University Shanxi Taiyuan030006 China CAS Center for Excellence in Ultra-intense Laser Science Shanghai201800 China

Two-dimensional materials are an emerging class of new materials with a wide range of electrical and optical properties and potential applications. Single-layer structures of semiconducting transition metal dichalcogenides are gaining increasing attention for use in field-effect transistors. Here, we report a photoluminescence switching effect based on single-layer WSe2 transistors. Dual gates are used to tune the photoluminescence intensity. In particular, a side-gate is utilized to control the location of ions within a solid polymer electrolyte to form an electric double layer at the interface of electrolyte and WSe2 and induce a vertical electric field. Additionally, a back-gate is used to apply a 2nd vertical electric field. An on-off ratio of the light emission up to 90 was observed under constant pump light intensity. In addition, a blue shift of the photoluminescence line up to 36 meV was observed. We attribute this blue shift to the decrease of exciton binding energy due to the change of nonlinear in-plane dielectric constant, and use it to determine the 3rd order off-diagonal susceptibility (Equation presented). Copyright © 2020, The Authors. All rights reserved.

关键词： Polyelectrolytes

Study of Λ0b and Ξb0 decays to Λh+h′− and evidence for CP violation in Λ0b → ΛK+K− decays

学校读者我要写书评

暂无评论

arXiv 2024年

作者： Aaij, R. Abdelmotteleb, A.S.W. Beteta, C. Abellan Abudinén, F. Ackernley, T. Adefisoye, A.A. Adeva, B. Adinolfi, M. Adlarson, P. Agapopoulou, C. Aidala, C.A. Ajaltouni, Z. Akar, S. Akiba, K. Albicocco, P. Albrecht, J. Alessio, F. Alexander, M. Aliouche, Z. Cartelle, P. Alvarez Amalric, R. Amato, S. Amey, J.L. Amhis, Y. An, L. Anderlini, L. Andersson, M. Andreianov, A. Andreola, P. Andreotti, M. Andreou, D. Anelli, A. Ao, D. Archilli, F. Argenton, M. Cuendis, S. Arguedas Artamonov, A. Artuso, M. Aslanides, E. Da Silva, R. Ataíde Atzeni, M. Audurier, B. Bacher, D. Perea, I. Bachiller Bachmann, S. Bachmayer, M. Back, J.J. Rodriguez, P. Baladron Balagura, V. Balboni, A. Baldini, W. Balzani, L. Bao, H. de Souza Leite, J. Baptista Pretel, C. Barbero Barbetti, M. Barbosa, I.R. Barlow, R.J. Barnyakov, M. Barsuk, S. Barter, W. Bartolini, M. Bartz, J. Basels, J.M. Bashir, S. Bassi, G. Batsukh, B. Battista, P.B. Bay, A. Beck, A. Becker, M. Bedeschi, F. Bediaga, I.B. Behling, N.A. Belin, S. Belous, K. Belov, I. Belyaev, I. Benane, G. Bencivenni, G. Ben-Haim, E. Berezhnoy, A. Bernet, R. Andres, S. Bernet Bertolin, A. Betancourt, C. Betti, F. Bex, J. Bezshyiko, Ia. Bhom, J. Bieker, M.S. Biesuz, N.V. Billoir, P. Biolchini, A. Birch, M. Bishop, F.C.R. Bitadze, A. Blake, T. Blanc, F. Blank, J.E. Blusk, S. Bocharnikov, V. Boelhauve, J.A. Garcia, O. Boente Boettcher, T. Bohare, A. Boldyrev, A. Bolognani, C.S. Bolzonella, R. Bonacci, R.B. Bondar, N. Bordelius, A. Borgato, F. Borghi, S. Borsato, M. Borsuk, J.T. Bouchiba, S.A. Bovill, M. Bowcock, T.J.V. Boyer, A. Bozzi, C. Rodriguez, A. Brea Breer, N. Brodzicka, J. Gonzalo, A. Brossa Brown, J. Brundu, D. Buchanan, E. Buonaura, A. Buonincontri, L. Burke, A.T. Burr, C. Butter, J.S. Buytaert, J. Byczynski, W. Cadeddu, S. Cai, H. Caillet, A.C. Calabrese, R. Ramirez, S. Calderon Calefice, L. Cali, S. Calvi, M. Gomez, M. Calvo Magalhaes, P. Camargo Bouzas, J.I. Cambon Campana, P. Perez, D.H. Campora Quezada, A.F. Campoverde Capelli, S. Capriotti, L. School of Physics and Astronomy Monash University Melbourne Australia Rio de Janeiro Brazil Rio de Janeiro Brazil Department of Engineering Physics Tsinghua University Beijing China Beijing China School of Physics State Key Laboratory of Nuclear Physics and Technology Peking University Beijing China University of Chinese Academy of Sciences Beijing China Institute of Particle Physics Central China Normal University Hubei Wuhan China San Jose Costa Rica Université Savoie Mont Blanc CNRS IN2P3 LAPP Annecy France Université Clermont Auvergne CNRS IN2P3 LPC Clermont-Ferrand France Gif-sur-Yvette France Aix Marseille Univ CNRS IN2P3 CPPM Marseille France Université Paris-Saclay CNRS IN2P3 IJCLab Orsay France Laboratoire Leprince-Ringuet CNRS IN2P3 Ecole Polytechnique Institut Polytechnique de Paris Palaiseau France LPNHE Sorbonne Université Paris Diderot Sorbonne Paris Cité CNRS IN2P3 Paris France I. Physikalisches Institut RWTH Aachen University Aachen Germany Universität Bonn Helmholtz-Institut für Strahlen und Kernphysik Bonn Germany Fakultät Physik Technische Universität Dortmund Dortmund Germany Physikalisches Institut Albert-Ludwigs-Universität Freiburg Freiburg Germany Heidelberg Germany Physikalisches Institut Ruprecht-Karls-Universität Heidelberg Heidelberg Germany School of Physics University College Dublin Dublin Ireland INFN Sezione di Bari Bari Italy INFN Sezione di Bologna Bologna Italy INFN Sezione di Ferrara Ferrara Italy INFN Sezione di Firenze Firenze Italy INFN Laboratori Nazionali di Frascati Frascati Italy INFN Sezione di Genova Genova Italy INFN Sezione di Milano Milano Italy INFN Sezione di Milano-Bicocca Milano Italy INFN Sezione di Cagliari Monserrato Italy INFN Sezione di Padova Padova Italy INFN Sezione di Perugia Perugia Italy INFN Sezione di Pisa Pisa Italy INFN Sezione di Roma La Sapienza Roma Italy INFN Sezione di Roma Tor Vergata Roma Italy Nikhef National Institute for Subatom

A study of Λ0b and Ξb0 decays to Λh+h′− (h(′) = π, K) is performed using pp collision data collected by the LHCb experiment during LHC Runs 1–2, corresponding to an integrated luminosity of 9 fb−1. The branching fractions for these decays are measured using the Λ0b → Λ+c (→ Λπ+)π− decay as control channel. The decays Λ0b → Λπ+π− and Ξb0 → ΛK−π+ are observed for the first time. For decay modes with sufficient signal yields, CP asymmetries are measured in the full and localized regions of the final-state phase space. Evidence is found for CP violation in the Λ0b → ΛK+K− decay, interpreted as originating primarily from an asymmetric Λ0b → N∗+K− decay amplitude. The measured CP asymmetries for the other decays are compatible with zero. © 2024, CC BY.

关键词： Phase space methods

Research on UAV Simulation Training System Based on Visual Simulation

学校读者我要写书评

暂无评论

Research on UAV Simulation Training System Based on Visual S...

IEEE International Conference on mechatronics and Automation

作者： Wang Ting Ting Bai Bing Yuan Yi Fang Zhu Yong Wei Beijing Key Laboratory of UAV Autonomous Control Beijing Institute of Technology Beijing China Beijing Aerospace Systems Engineering Institute Beijing China

For the existing UAV simulation training systems are out of equipment application reality with undesirability training effect, this paper presents a kind of UAV simulation training system based on visual simulation. The overall structure of the system including UAV ground control station, flight simulation subsystem, three-dimensional visual simulation, and training control subsystem is constructed by the visual simulation method, and a comprehensive regulation of training evaluation is proposed using Analytic Hierarchy Process (AHP), which is applied to evaluate the training performance. The UAV simulation training system provides a new technical approach for UAV training, also has certain application value.

关键词： UAV Simulation Training System Visual Simulation Training Evaluation

Optimization for urban rail timetable under dynamic passenger demand on different days 17

学校读者我要写书评

暂无评论

Optimization for urban rail timetable under dynamic passenge...

17th COTA International Conference of Transportation Professionals: Transportation Reform and Change - Equity, Inclusiveness, Sharing, and Innovation, CICTP 2017

作者： Qiao, Yu Shao, Chunfu Zhang, Tianyu MOE Key Laboratory for Urban Transportation Complex Systems Theory and Technology Dept. of Traffic Engineering Beijing Jiaotong Univ. P.O. Box 100044 Beijing China State Key Lab of Rail Traffic Control and Safety Dept. of Traffic Engineering Beijing Jiaotong Univ. P.O. Box 100044 Beijing China

ISBN: (数字)9780784480915

ISBN: (纸本)9780784480915

The passenger demand for urban rail transit is dynamic and different for working days, weekends, and holidays. Train timetables that adapt to different and dynamic passenger demand can improve the capacity and efficiency of urban rail transit and meet the needs of passengers. This paper first analyzes the characteristics of the passenger demand and then formulate a model with the objective to minimize the user cost and operating cost under constraints of train operations and the passenger boarding and alighting process. The proposed model is examined through a real-world case solved by an improved simulated annealing algorithm that adjusts train number, train running time, train dwell time, and departure and arrival times at each station. It then analyses characteristics of the train timetable under different passenger demand, such as train load factor in each section and remaining passenger number, which is useful to operational management in the subway system. © 2017 ASCE.

关键词： Simulated annealing