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Comparative analysis of twelve transfer learning models for the prediction and crack detection in concrete dams,based on borehole images

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Frontiers of Structural and Civil engineering 2024年第10期18卷 1507-1523页

作者： Umer Sadiq KHAN Muhammad ISHFAQUE Saif Ur Rehman KHAN Fang Xu Lerui CHEN Yi LEI School of Computer and Information Science Hubei Engineering UniversityXiaogan 432000China Institute for AI Industrial Technology Research Hubei Engineering UniversityXiaogan 432000China College of Water Conservancy and Hydropower Engineering Hohai UniversityNanjing 210098China School of Computer Science and Engineering Central South UniversityChangsha 410083China College of Aviation Zhongyuan University of TechnologyZhengzhou 451191China School of Civil Engineering Central South UniversityChangsha 410083China

Disaster-resilient dams require accurate crack detection,but machine learning methods cannot capture dam structural reaction temporal patterns and *** research uses deep learning,convolutional neural networks,and transfer learning to improve dam crack *** deep-learning models are trained on 192 crack *** research aims to provide up-to-date detecting techniques to solve dam crack *** finding shows that the EfficientNetB0 model performed better than others in classifying borehole concrete crack surface tiles and normal(undamaged)surface tiles with 91%*** study’s pre-trained designs help to identify and to determine the specific locations of cracks.

关键词： concrete dam borehole closed-circuit television deep learning models crack detection water resources management management

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Distributed secondary frequency control scheme with A-symmetric time varying communication delays and switching topology

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e-Prime - Advances in Electrical engineering, Electronics and Energy 2024年 9卷

作者： Rustam, Muhammad Asfandyar Khan, Muhammad Yasir Ali Abbas, Tasawar Khan, Bilal Faculty of Engineering and Technology Gomal University Dera Ismail Khan Pakistan College of Water Conservancy and Hydropower Engineering Hohai University Nanjing 210098 China College of Electrical and Power Engineering Hohai University Nanjing 211100 China Department of Electrical and Computer Engineering COMSATS University Islamabad Islamabad Pakistan

A distributed control of a Microgrid (MG) depends on the communication network for the exchange of information among the Distributed Generators (DGs). Most of the control schemes consider ideal communication among the DGs;however, in practical systems, delays are inherited in a system that can affect the dynamic performance and even destabilize an MG. Therefore, in this research work, delay independent distributed secondary frequency control for MGs is presented. Sufficient delay independent conditions for robust stability of the buffer-free Distributed Averaging Integral (DAI) control scheme is proposed while considering A-symmetric time varying communication delays and switching network topology. Moreover, in this work, slow as well as fast varying delays are analyzed using Lyapunov Krasovskii and Lyapunov Razumikhin's approach. Furthermore, a Lyapunov function based adaptive control approach is employed that updates the constant gain parameters to compensate for the uncertain or varying parameters. Finally, the efficacy of the controller is demonstrated through simulation studies that validate its performance in different scenarios. © 2024 The Author(s)

关键词： Adaptive control Communication delays Distributed secondary control Islanded mode Microgrid Switching topology

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The use of the biochar-based catalyst for the improvement of bioelectrochemical cleanup of NO₃ and NH₃ in water environment

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Total Environment Research Themes 2022年 3-4卷

作者： Ibrahim, Muhammad Chen, Deqiang Alhassan Danjaji, Hafsat Yang, Ying Wada Muhammad, Idris Muazu, Tasiu Department of Environmental Management and Toxicology Federal University Dutse Dutse 720101 Nigeria Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes Ministry of Education College of Environment Hohai University Nanjing 210098 China Department of Biological Sciences Yobe State University Damaturu 620101 Nigeria International School Hohai University Nanjing 210098 China Department of Agricultural Engineering Federal University Wukari Wukari 670101 Nigeria College of Water Conservancy and Hydropower Engineering Hohai University Nanjing 210098 China College of Computer and Information Hohai University Nanjing 210098 China College of Civil and Transportation Engineering Hohai University Nanjing 210098 China

A bioelectrochemical system is a form of bioengineering technology that has been popularly employed in treating wastewater and energy recovery. However, most of the recent studies in the field of bioelectrochemical technology have mainly focused on scalable architectural designs of the system, while research on the selection of a suitable biocatalyst for the improvement of bioelectrochemical cleanup of pollutants has been given insufficient consideration. The three major limitations of improving bioelectrochemical cleanup technology are time consumption, high cost, and non-nature-based catalyst. In this study, a new bioelectrochemical compartment (BC) incorporating a biochar-based catalyst was fabricated to determine the upscaling effect on the cleanup of nitrate (NO₃) and ammonia (NH₃) from an aqueous solution. The two different bioelectrochemical reactors used in this experiment were denoted as System 1 (control), and System 2 (experimental), which were later expressed as S1 and S2, and the wastewater sample used was activated sludge. The highest cleanup efficiency of NO₃ (99%) was achieved in S2 when the BC was operated with a biochar-based catalyst compared to that of the which was 95%. However, the cleanup efficiencies of NH₃ were 96% and 67% in S1 and S2, respectively. This outcome indicated that the highest cleanup efficiency of NH₃ was achieved in S1. In addition, we monitored biogas generation in each BC and recovered a significant quantity of CO₂ N₂O, and CH₄. Sporosarcina, Tissierala from the species of Firmicutes, and Pseudomonas of phylum Proteobacteria were the most abundant bacteria that supported the cleanup of pollutants in this study. © 2022 The Author(s)

关键词： Artificial media Biochar-based catalyst Bioelectrochemical fermentation Wastewater

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A Multiscale Approach to Tubular Structure Detection in 3D Medical Images

A Multiscale Approach to Tubular Structure Detection in 3D M...

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2012 Third International Conference on Theoretical and Mathematical Foundations of computer Science(ICTMF 2012)

作者： Shi-hai Zhu Department of Computer and Information Engineering Zhejiang Water Conservancy and Hydropower College

Image detection is an important technology which has been applied extensively to geometric measurement,industrial quality inspection,three-dimensional surface detection and so *** most of the image detection algorithms are effective for specific problems so far,there is no detection algorithm can be applied to solve all image detection *** of tubular structures in 3D images is an important issue for vascular medical *** this paper,we propose a new adaptive medialness measure for detection of tubular structures in 3D *** adaptiveness of the medialness is based on the Hessian matrix of the image,its eigenvectors and *** we describe the proposed measure of medialness and ridge,Second we use a simple model of cylindrical vessel with circular Gaussian cross-section to illustrate our detection solution,meantime we give the relationship between the size of the structure and its selected *** this relationship,we explain the extraction of local extrema and make a full reconstruction of the vessels *** synthetic images are used to test our study under the suggested tubular structures,Finally we draw some conclusions and outline future work.

关键词： vessel detection multiscale analysis vascular medical imaging image reconstruction

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Professionalism Building Strategies of Software Undergraduates Based on SCCT

Professionalism Building Strategies of Software Undergraduat...

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2012 2nd International Conference on Social Sciences and Society(ICSSS 2012)

作者： Shi-hai Zhu Department of Computer and Information Engineering Zhejiang Water Conservancy and Hydropower College

Occupation career planning and design have important guidance significance for occupation development of software specialty undergraduates. At present software specialty undergraduates are inadequate in career planning and face grim employment situation. In this paper, we understand the demand of software enterprises for talents by using the method of investigating and interviewing. Then we analyze software students' career planning and occupation preparation situation. Next, we give some advice on professionalism building strategies of software specialty undergraduates based on SCCT from three respects of colleges, teachers and students, aiming to show their life potentials to the greatest degree and achieve their value of life in the end.

关键词： Software undergraduates, SCCT, career planning, professionalism building strategies.

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Minimum diameter cost-constrained Steiner trees

Minimum diameter cost-constrained Steiner trees

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作者： Ding, Wei Xue, Guoliang Zhejiang Water Conservancy and Hydropower College Hangzhou Zhejiang China Department of Computer Science and Engineering Arizona State University Tempe AZ 85287-8809 United States

Given an edge-weighted undirected graph G=(V,E,c,w) where each edge eΕE has a cost c(e)≥0 and another weight w(e)≥0, a set S⊂ V of terminals and a given constant \mathrm{C}-0≥0, the aim is to find a minimum diameter Steiner tree whose all terminals appear as leaves and the cost of tree is bounded by \mathrm{C}-0. The diameter of a tree refers to the maximum weight of the path connecting two different leaves in the tree. This problem is called the minimum diameter cost-constrained Steiner tree problem, which is NP-hard even when the topology of the Steiner tree is fixed. In this paper, we deal with the fixed-topology restricted version. We prove the restricted version to be polynomially solvable when the topology is not part of the input and propose a weakly fully polynomial time approximation scheme (weakly FPTAS) when the topology is part of the input, which can find a (1+Ε) -approximation of the restricted version problem for any Ε >0 with a specific characteristic. © 2013 Springer Science+Business Media New York.

关键词： Costs

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Research on controller of micro-hydro power system

Research on controller of micro-hydro power system

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2014 International Conference on Energy Research and Power engineering, ERPE 2014

作者： Xie, Nan Qi, De Zhi Chen, Wei Min Wang, Wei Dept. of Computer and Information Engineering Zhejiang Conservancy and Hydropower College Hangzhou 310018 China College of Mechanical and Electrical Engineering China Jiliang University Hangzhou 310018 China

ISBN: (纸本)9783038351603

On the existing independent operation of micro-hydro systems, A kind of circuit topology of micro hydro power based on self-excited asynchronous generator are studied. using power electronic devices to meet power standard and reduce circuit losses. the double loop to control of inner current loop and outer voltage loop is studied, Realizes the fast control of system and injected into the grid in the form of current, It's safety and high efficiency. Last, Using experimental platform to verify the feasibility of the system. © (2014) Trans Tech Publications, Switzerland.

关键词： Asynchronous generators

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Correlative Factors on Visual Forms of Outdoor Advertising

Correlative Factors on Visual Forms of Outdoor Advertising

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2012 International Academic Conference of Art engineering and Creative Industry(IACAE 2012)

作者： Ding Min Dept. of Computer and Information Engineering Zhejiang Water Conservancy and Hydropower College

The excessive pressure has exceeded the load of people's attention and led to the attention deficit In modern society. Traditional media can create smaller and smaller value for the companies. With the higher performance-price ration and broad innovation space, outdoor media achieved unprecedented development in the communication age. Exploring the possibility on the perspective of visual communication and focusing on the correlation among the various elements of the outdoor advertising, which make the advertising communication more effective.

关键词： Outdoor Advertising,Visual Communication,Correlative Factors

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Curriculum Optimization of Web Design and Making Basing on Search Engine Optimization

Curriculum Optimization of Web Design and Making Basing on S...

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2013 International Conference on Education and Teaching(ICET 2013)

作者： Guan Xiaohui Qian Yaguan Department of Computer and Information Engineering Zhejiang Water Conservancy and Hydropower College Science College Zhejiang University of Science and Technology

Now more and more companies begin to pay attention to economic benefits of their website. They will demand more talented persons engaged web design and making. The curriculum of web design and making is a core professional course of computer specialty . It is used to train students methods and techniques of designing and making websites. In order to improve the ranking of website in search engines of Google or Baidu, this course should be reformed basis of the idea of search engine optimization. In this paper, we analyze existing problems of this course and propose how to optimize processing of implementation in the light of search engine optimization. Finally teaching mode of the curriculum is also explored.

关键词： Web design, Search Engine Optimization, HTML tags.

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Hardware implementation based on FPGA of interrupt management in a real-time operating system

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information Technology Journal 2013年第5期12卷 943-950页

作者： Zhu, Shi-Hai Department of Computer and Information Engineering Zhejiang Water Conservancy and Hydropower College China

Hardware interrupt management method based on field programmable gate array is proposed in this study according to the requirement of embedded real-time operating system for real-time performance and the structure model of interrupt management module is also given. Interrupt is subdivided into system and user interrupts owing to different characteristics of interrupt request and response method. Interrupt source management, interrupt vector management, interrupt nesting and clock tick interrupt management have all been implemented by hardware. The simulation results show the feasibility and stability of this kind of interrupt management method. In a word, the implementation of interrupt management by hardware improves not only the utilization rate of CPU, but also the real-time performance of the whole system. © 2013 Asian Network for Scientific information.

关键词： Field programmable gate arrays (FPGA)

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