检索结果-内蒙古大学图书馆

Adaptive fast-reaching nonsingular terminal sliding mode tracking control for quadrotor UAVs subject to model uncertainties and external disturbances

引用

Ain Shams engineering Journal 2023年第8期14卷

作者： Mobayen, Saleh El-Sousy, Fayez F.M. Alattas, Khalid A Mofid, Omid Fekih, Afef Rojsiraphisal, Thaned Graduate School of Intelligent Data Science National Yunlin University of Science and Technology 123 University Road Section 3 Douliou Yunlin640301 Taiwan Department of Electrical Engineering Prince Sattam Bin Abdulaziz University Al Kharj Saudi Arabia Department of Computer Science and Artificial Intelligence College of Computer Science and Engineering University of Jeddah Jeddah Saudi Arabia Department of Electrical and Computer Engineering University of Louisiana at Lafayette Lafayette United States Advanced Research Center for Computational Simulation Department of Mathematics Faculty of Science Chiang Mai University Chiang Mai50200 Thailand Data Science Research Center Department of Mathematics Faculty of Science Chiang Mai University Chiang Mai50200 Thailand

This paper proposes an adaptive fast-reaching nonsingular terminal sliding mode control approach for the position and attitude tracking control of a quadrotor UAV subject to model uncertainty and external disturbances. To this end, a fast-reaching nonsingular terminal sliding surface is defined with the aim of fast convergence of the tracking error. The fast reachability of the nonsingular terminal sliding surface is proven using the Lyapunov stability theory. Since, in practice, the upper bounds of model uncertainties and external disturbances are unknown, an adaptive control scheme is considered to approximate them. The fast-reaching nonsingular terminal sliding mode control approach was augmented with the adaptive scheme to ensure both, the fast convergence of the switching surfaces and the rejection of model uncertainties and external disturbances. The effectiveness of the proposed adaptive fast-reaching nonsingular terminal sliding mode control approach is assessed using simulations of a quadrotor system implemented in MATLAB/Simulink software. The obtained results are further compared to those of an existing approach in terms of tracking performance, robustness, and integrator of absolute-value of error criteria. © 2022 THE AUTHORS

关键词： Unmanned aerial vehicles (UAV)

来源：评论

学校读者我要写书评

暂无评论

Vacancy-Type Defects in Thin HfO2 Layers Probed by Monoenergetic Positron Beams 30

Vacancy-Type Defects in Thin HfO2 Layers Probed by Monoenerg...

引用

30th International Symposium on Semiconductor Manufacturing, ISSM 2024

作者： Uedono, Akira Kawakami, Kazuya Kuribara, Tatsunori Hasunuma, Ryu Harashima, Yosuke Shigeta, Yasuteru Ni, Zeyuan Yan, Ruolin Nakamura, Hideo Notake, Akira Moriya, Tsuyoshi Michishio, Koji Ishibashi, Shoji University of Tsukuba Faculty of Pure and Applied Science Ibaraki Tsukuba305-8573 Japan Nara Institute of Science and Technology Graduate School of Science and Technology Nara Ikoma630-0192 Japan Tokyo Electron Technology Solutions Ltd. S-Technology Development Center Yamanashi Nirasaki407-0192 Japan Tokyo Electron Technology Solutions Ltd. Development Department 1 Yamanashi Nirasaki407-0192 Japan Tokyo Electron Ltd. Digital Design Center Hokkaido Sapporo060-0003 Japan Tokyo Electron Technology Solutions Ltd. Software and Data Engineering Division Yamanashi Nirasaki407-0192 Japan National Institute of Advanced Industrial Science and Technology Research Institute for Measurement and Analytical Instrumentation Ibaraki Tsukuba305-8568 Japan National Institute of Advanced Industrial Science and Technology Research Center for Computational Design of Advanced Functional Materials Ibaraki Tsukuba305-8568 Japan

ISBN: (纸本)9798331510589

Behaviors of vacancies during the amorphous-to-crystalline transition of thin HfO2 layers were studied by monoenergetic positron beams. The HfO2 layers with 430 nm thickness were fabricated on TiN/Si templates by atomic layer deposition technique. The major vacancy-type defects in the layers were identified as (i) Hf vacancies (VHf) coupled with oxygen vacancies (VOs) and (ii) vacancy clusters. After annealing at 500°C, the concentration of vacancy clusters increased, which was attributed to the agglomeration of intrinsic open spaces in the amorphous phase upon the phase transition from amorphous to crystalline phases. The phase transition started near the interface between the HfO2 layer and bottom electrodes (TiN). After the crystallization, the concentration of vacancy clusters decreased as the annealing temperature increased. © 2024 IEEE.

关键词： Positron annihilation

来源：评论

学校读者我要写书评

暂无评论

引用

China CDC weekly 2022年第40期4卷 885-889,I0002-I0005页

作者： Yuan Bai Mingda Xu Caifen Liu Mingwang Shen Lin Wang Linwei Tian Suoyi Tan Lei Zhang Petter Holme Xin Lu Eric H.Y.Lau Benjamin J.Cowling Zhanwei Du WHO Collaborating Centre for Infectious Disease Epidemiology and Control School of Public HealthLi Ka Shing Faculty of MedicineThe University of Hong KongHong Kong Special Administrative RegionChina Laboratory of Data Discovery for Health Limited(D24H) Hong Kong Science ParkHong Kong Special Administrative RegionChina China-Australia Joint Research Center for Infectious Diseases School of Public HealthXi’an Jiaotong University Health Science CenterXi’an CityShaanxi ProvinceChina Department of Genetics University of CambridgeCambridge CB23EHUK College of Systems Engineering National University of Defense TechnologyChangsha CityHunan ProvinceChina Department of Computer Science Aalto UniversityEspooFinland Center for Computational Social Science Kobe UniversityKobeJapan

Introduction:Minimizing the importation and exportation risks of coronavirus disease 2019(COVID-19)is a primary concern for sustaining the“Dynamic COVID-zero”strategy in *** estimation is essential for cities to conduct before relaxing border control ***:Informed by the daily number of passengers traveling between 367 prefectures(cities)in China,this study used a stochastic metapopulation model parameterized with COVID-19 epidemic characteristics to estimate the importation and exportation ***:Under the transmission scenario(R0=5.49),this study estimated the cumulative case incidence of Changchun City,Jilin Province as 3,233(95%confidence interval:1,480,4,986)before a lockdown on March 14,2022,which is close to the 3,168 cases reported in real life by March 16,*** a total of 367 prefectures(cities),127(35%)had high exportation risks according to the simulation and could transmit the disease to 50%of all other regions within a period from 17 to 94 *** average time until a new infection arrives in a location in 1 of the 367 prefectures(cities)ranged from 26 to 101 ***:Estimating COVID-19 importation and exportation risks is necessary for preparedness,prevention,and control measures of COVID-19—especially when new variants emerge.

关键词： Export Changchun prevention

来源：评论

学校读者我要写书评

暂无评论

Characterization of heavy-chain antibody gene repertoires in Bactrian camels

引用

Journal of Genetics and Genomics 2023年第1期50卷 38-45页

作者： Yuexing Liu Li Yi Yixue Li Zhen Wang Jirimutu CAS Key Laboratory of Computational Biology Shanghai Institute of Nutrition and HealthUniversity of Chinese Academy of SciencesChinese Academy of SciencesShanghai 200031China Key Laboratory of Dairy Biotechnology and Engineering Ministry of EducationCollege of Food Science and EngineeringInner Mongolia Agricultural UniversityHuhhotInner Mongolia 010018China Hangzhou Institute for Advanced Study University of Chinese Academy of SciencesHangzhouZhejiang 310024China School of Life Sciences and Biotechnology Shanghai Jiao Tong UniversityShanghai 200240China Guangzhou Laboratory GuangzhouGuangdong 510005China Bio-Med Big Data Center Shanghai Institute of Nutrition and HealthUniversity of Chinese Academy of SciencesChinese Academy of SciencesShanghai 200031China Collaborative Innovation Center for Genetics and Development Fudan UniversityShanghai 200433China Inner Mongolia Institute of Camel Research West AlaxInner Mongolia 737399China

Camelids are the only mammals that can produce functional heavy-chain antibodies(HCAbs).Although HCAbs were discovered over 30 years ago,the antibody gene repertoire of Bactrian camels remains largely *** characterize the diversity of variable genes of HCAbs(VHHs),germline and rearranged VHH repertoires are *** analysis shows that all camelid VHH genes are derived from a common ancestor and the nucleotide diversity of VHHs is similar across all camelid *** species-specific hallmark sites are identified,the non-canonical cysteines specific to VHHs are distinct in Bactrian camels and dromedaries compared with *** low divergence at the germline repertoire between wild and domestic Bactrian camels,higher expression of VHHs is observed in some wild Bactrian camels than that of domestic *** study not only adds our understanding of VHH repertoire diversity across camelids,but also provides useful resources for HCAb engineering.

关键词： Bactrian camel Heavy-chain antibody Nanobody Immune repertoire diversity Non-canonical cysteine

来源：评论

学校读者我要写书评

暂无评论

A "String Art" Approach to the Design and Manufacturing of Optimal Composite Materials and Structures

arXiv

引用

arXiv 2020年

作者： Ostanin, Igor Center for Computational and Data-Intensive Science and Engineering Skolkovo Institute of Science and Technology Moscow Russia

In this paper we report a new promising idea on the design and manufacturing of ply composite structures, tailored to exhibit maximum stiffness under given weight constraints and loading conditions. It is based on the idea behind an artistic technique known as "string art" - the representation of an image with a single thread, tensioned between pins on the flat frame. A discrete optimization algorithm has been employed recently to formalize the process of finding a configuration of thread windings that fuses into a given greyscale image. We demonstrate how this algorithm can be employed to approximate the two-dimensional distribution of isotropic material, computed by a conventional topology optimization algorithm. An optimal composite design is thus found as a result of the following two-stage process. At the first stage, topology optimization procedure produces regular grid of greyscale values of stiffness. At the second stage, this distribution is approximated with a polyline, representing the stiff reinforcement fiber in a soft matrix, according to "string art" optimization algorithm. The efficiency of the proposed approach is illustrated with few simple numerical examples. Our development opens a wide avenue for the industrial design of the new generation of fibrous composite structures. Copyright © 2020, The Authors. All rights reserved.

关键词： Manufacture

来源：评论

学校读者我要写书评

暂无评论

Analysis of Panoramic Images using Deep Learning For Dental Disease Identification

Analysis of Panoramic Images using Deep Learning For Dental ...

引用

Artificial Intelligence and Smart Systems (ICAIS), International Conference on

作者： Mohamed Mallick Midhun Kumar A Sakthi Govindaraju A. Suresh Kumar Manivel Kandasamy P Anitha Rathinam Group of Institutions Coimbaotore Database Engineer Indian Biological Data Center Center for Biotechnology Faridabab School of Computing Science and Engineering Galogotias University Delhi NCR Department of Computer Science and Engineering Graphic Era Deemed to be University Dehradun India Unitedworld School of Computational Intelligence Karnavati University Gujarat India OASYS Institute of Technology Trichy India

Dental caries is a distinct disease strategy caused by the metabolic action of dental biofilm, which continually demineralizes lacquer and dentine. Its commonly known as tooth rot, is one of the most prevalent and long- lasting dental illnesses, affecting people at all stages of their lives. There are a few different sorts of dental x-rays, each of which records a different perspective on dental living systems for caries detection and has the highest symptomatic accuracy, whereas panoramic radiography has the lowest Despite this, Bitewing has a few downsides, such as patient unease. Because of the lack of knowledge among administrators, Bitewing imaging frequently results in increased patient radiation exposure as a result of the need for image retakes. On the other hand, panoramic x-ray scans, also known as Orthopantomogram (OPG), are commonly utilized to capture the whole mouth with a small amount of radiation. OPG has a low radiation content, is simple to use, takes less time, and provides exceptional patient comfort. In this way, when compared to intraoral frameworks, pediatric, impaired, and senior people would profit greatly from panoramic imaging frameworks. This research work explores panoramic photos to detect accurate dental disease using deep learning. As a result, most patients can benefit from panoramic imaging, which covers a large portion of the maxillofacial region, including all of the teeth.

关键词： Deep learning Lacquers Visualization Laplace equations Teeth X-rays Learning (artificial intelligence)

来源：评论

学校读者我要写书评

暂无评论

Bioclimatic zonation and spatial-scale dependence of lacustrine microbial assemblages

引用

science Bulletin 2025年第7期70卷 1152-1164页

作者： Shuren Wang Qinglong L.Wu Huabing Li Rujia He Congcong Jiao Mengyu Qin Ye Deng Guoqing Zhang Dayong Zhao Jin Zeng Key Laboratory of Lake and Watershed Science for Water Security Nanjing Institute of Geography and LimnologyChinese Academy of SciencesNanjing 211135China Joint International Research Laboratory of Global Change and Water Cycle the National Key Laboratory of Water Disaster PreventionHohai UniversityNanjing 210098China Center for Evolution and Conservation Biology Southern Marine Sciences and Engineering Guangdong Laboratory(Guangzhou)Guangzhou 511458China Sino-Danish Centre for Education and Research University of Chinese Academy of SciencesBeijing 100049China CAS Key Laboratory of Environmental Biotechnology Research Center for Eco-Environmental SciencesChinese Academy of SciencesBeijing 100085China National Genomics Data Center&Bio-Med Big Data Center CAS Key Laboratory of Computational BiologyShanghai Institute of Nutrition and HealthChinese Academy of SciencesShanghai 200031China

Bioclimatic zonation is critical for understanding how climate shapes biodiversity and biogeographic ***,existing studies have primarily focused on macroorganisms,leaving microbial communities largely *** study seeks to address this gap through extensive sampling of bacterial communities from 931 sediment samples across 199 lakes in *** on the obtained data,we identified five distinct lacustrine microbial bioclimatic zones,each showing significant differences in multiple facets of bacterial diversity(i.e.,alpha,beta,and gamma diversity)and clear bioclimatic zone-dependent microbial biogeographic ***,the alpha and beta diversity of the bacterial communities showed opposing patterns across bioclimatic *** environmental variables—specifically mean annual temperature,elevation,lake hydrological variables,and sediment pH—exerted contrasting effects on the alpha and beta diversity and played critical roles in shaping microbial community distribution at different spatial *** continental scales,predominant geographic and climatic variables dictated the patterns of bioclimatic zonation of lacustrine microbial *** regional scales,hydrological variables influenced the dispersal capacity of lake microbes,whereas sediment physicochemical variables were the most important selection factors shaping local microbial ***,our findings indicated that bioclimatic boundaries substantially enhanced the contribution of variable selection on bacterial community assembly and led to marked changes in distance-decay relationships in community ***,this study established a continental bioclimatic framework for lacustrine microbial communities,clarifying how environmental variables control microbial distributions across spatial scales,providing new insights into microbial biogeography,and advancing our knowledge about biodiversity under future climate change scenarios.

关键词： Bioclimatic zonation Lake sediments Microbial biogeography Scale dependence Hydrological variables

来源：评论

学校读者我要写书评

暂无评论

Optimal Multistage Group Testing Algorithm for 3 Defectives

Optimal Multistage Group Testing Algorithm for 3 Defectives

引用

IEEE International Symposium on Information Theory

作者： Ilya Vorobyev Center for Computational and Data-Intensive Science and Engineering Skolkovo Institute of Science and Technology Moscow Russia

The following topics are dealt with: channel coding; computational complexity; decoding; channel capacity; probability; optimisation; error correction codes; learning (artificial intelligence); graph theory; and data ...

ISBN: (数字)9781728164328

ISBN: (纸本)9781728164335

关键词：

来源：评论

学校读者我要写书评

暂无评论

Bayesian generative models for knowledge transfer in MRI semantic segmentation problems

arXiv

引用

arXiv 2020年

作者： Kuzina, Anna Egorov, Evgenii Burnaev, Evgeny Skolkovo Institute of Science and Technology Center for Computational and Data-Intensive Science and Engineering Moscow Russia

Automatic segmentation methods based on deep learning have recently demonstrated state-of-the-art performance, outperforming the ordinary methods. Nevertheless, these methods are inapplicable for small datasets, which are very common in medical problems. To this end, we propose a knowledge transfer method between diseases via the Generative Bayesian Prior network. Our approach is compared to a pre-train approach and random initialization and obtains the best results in terms of Dice Similarity Coefficient metric for the small subsets of the Brain Tumor Segmentation 2018 database (BRATS2018). Copyright © 2020, The Authors. All rights reserved.

关键词： Tumors

来源：评论

学校读者我要写书评

暂无评论

Depth Estimation of the Object of Interest in Challenging Cross-Domain Scenes

SSRN

引用

SSRN 2023年

作者： Xu, Chenglong Chen, Chu Xing, Wen Herrera-Viedma, Enrique College of Intelligent Systems Science and Engineering Harbin Engineering University Harbin150001 China Qingdao Innovation and Development Center Harbin Engineering University Qingdao266000 China Shenyang SIASUN Robot & Automation Co. LTD Shenyang110168 China Andalusian Research Institute of Data Science and Computational Intelligence Department of Computer Science and AI University of Granada Granada18071 Spain

Depth estimation plays an important role in 3D visual perception, autonomous vehicles, and near-field optical detection. At present, there are mainly learning-based methods and traditional geometric constraint reasoning based methods. However, most learning-based methods have poor cross-domain generalization, the accuracy will be greatly reduced when tested on new scenes. Although the traditional geometric methods have strong scene adaptability, they have more marginal noise in depth discontinuity areas, and require a large amount of memory at a high bandwidth. In order to solve the above problems, we present a disparity confidence propagation and edge smoothing framework, which combines robust semantic mask with tree diffusion model. Compared with those of state-of-the-art fast geometric constraint based methods and learning-based methods, the proposed method has a great improvement in cross-domain adaptability and efficiency. Experiments on multiple data sets verify the effectiveness of the method, and a good balance is achieved between generalization and accuracy. © 2023, The Authors. All rights reserved.

关键词： Semantics

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：