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three-dimensional modelling and numerical analysis of Pelton turbine runner buckets 8

Three-dimensional modelling and numerical analysis of Pelton...

引用

8th International conference on Pumps and Fans, ICPF 2024

作者： Wang, H.B. Li, D.Y. Fu, X.L. Gong, R.Z. Wang, H.J. School of Energy Science and Engineering Harbin Institute of Technology Harbin150001 China

the Pelton turbine, a hydraulic prime mover, harnesses high-pressure water jets' kinetic energy to drive the rotation of its runner buckets, converting water energy into mechanical energy. Due to its straightforward design and applicability in high to super high head scenarios, it has been a mainstay in power stations for many years. the bucket, a critical component of the Pelton turbine's runner, plays a pivotal role in the unit's performance. Using Non-Uniform Rational B-Splines (NURBS) to develop a parametric water bucket model enhances adaptability. Also, performing unsteady numerical simulations on the model analyses its hydraulic characteristics and flow state distribution. the numerical calculations fundamentally capture the unsteady flow conditions within the rotating buckets, with the results of the flow pattern distribution largely aligning with those documented in existing research. this provides a reference for enhancing the hydraulic performance of Pelton turbine runners. © 2024 Institute of Physics Publishing. All rights reserved.

关键词： Kinetic energy

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Research on Improvement Calculation Method of design thrust of Anti Slide Pile 1

引用

8th International conference on Civil engineering (ICCE)

作者： Hou, Xiaoqiang Liu, Jierui Wang, Xinfei Zhou, Zhongren Jia, Honglu Lanzhou Jiaotong Univ Sch Civil Engn Lanzhou 730070 Peoples R China China Construct Rd & Bridge Grp Co Ltd Shijiazhuang 050001 Hebei Peoples R China

ISBN: (数字)9789811912603

ISBN: (纸本)9789811912603;9789811912597

At present, based on the transfer coefficient method, most of the anti-slide pile design thrusts are calculated by the overload method and the strength reserve method respectively. Many algorithms only consider the remaining sliding force behind the pile and the safety factor that meets the requirements of the design conditions. Generally, the safety factor is the safety factor of the sliding slope behind the pile after the anti slide pile is reinforced. For the entire landslide, there are two safety factors before and after the pile, which is not the design safety factor target value, and there is a big difference between the safety factor and the treatment goal required by the specification. through the study of the pile-soil interaction of anti-slide piles, it is believed that in addition to the active residual sliding force transmitted by the blocks behind the pile, the anti-slide piles are simultaneously subjected to the passive residual anti-sliding force transmitted upwards by the blocks in front of the pile. the stress analysis shows that: Firstly, according to the different active and passive properties of anti-sliding force transmission and sliding force transmission, the mechanical model of anti-sliding force transmission is studied, and the calculation formula of anti-sliding force transmission coefficient is derived;Secondly, It is believed that the anti-slide pile provides horizontal thrust to the landslide, and two components of the sliding surface direction and the vertical sliding surface direction are generated. the balance equation is established and the overload method and the strength reserve method of anti-slide pile thrust calculation formula are derived;thirdly, according to the principle of setting piles in the anti-slip section, the optimal location of anti-slide piles are proposed;Fourthly, after verification of cases, the safety factors before and after the piles calculated by the overload method are basically equal, and consistent with t

关键词： Anti-sliding pile design thrust Anti-sliding force transmission coefficient Location selection condition Safety factor

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design and Implementation of Household Carbon Emission Estimation Program Based on Financial Consumption 8th

Design and Implementation of Household Carbon Emission Estim...

引用

8th International conference on Advances in Energy Resources and Environment engineering, ICAESEE 2022

作者： Zhang, Wenhan Shandong Experimental High School Jinan China

ISBN: (纸本)9783031425622

In order to raise the public's concern about carbon emissions and let more residents know about the carbon emissions and their impacts, a household carbon emission estimation method based on financial consumption was proposed, and the practical application of the algorithm was realized through software development. Household carbon emissions can be divided into direct carbon emissions and indirect carbon emissions. Based on the typical correspondence between energy consumption and consumption, an estimation model of individual carbon emissions is proposed. Based on this estimation model, the software program of household carbon emission estimator is designed, and the mini program "My carbon emission" is developed by using WeChat mini program platform. In addition to providing carbon estimation services, the "My carbon emission" mini program also provides extended services such as ranking carbon emissions, suggesting carbon reduction measures, and sharing knowledge about carbon emissions on an irregular basis. A statistical analysis of 112 trial participants’ actual application data shows that electricity consumption and fuel consumption are the main sources of household carbon emissions. Further investigation found that more than 80% of the trial users said that the function of the system helps them understand carbon emissions, and they are willing to participate in the extended services such as carbon ranking and carbon trading. © the Author(s), under exclusive license to Springer Nature Switzerland AG 2024.

关键词： Energy utilization

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Reliability analysis of Fault Tolerant Memory systems

Reliability Analysis of Fault Tolerant Memory Systems

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South Eastern European design Automation, Computer engineering, Computer Networks and Social Media conference (SEEDA-CECNSM)

作者： Yagmur Yigit Leandros Maglaras Mohamed Amine Ferrag Naghmeh Moradpoor Georgios Lambropoulos School of Computing Engineering and The Build Environment Edinburgh Napier University UK Technology Innovation Institute United Arab Emirates UAE Department of Informatics University of Piraeus Piraeus Greece

this paper delves into a comprehensive analysis of fault-tolerant memory systems, focusing on recovery techniques modelled using Markov chains to address transient errors. the study revolves around the application of scrubbing methods in conjunction with Single Error Correction and Double Error Detection (SEC-DED) codes. It explores three primary models: 1) Exponentially distributed scrubbing, involving periodic checks of memory words within exponentially distributed time intervals; 2) Deterministic scrubbing, featuring regular, periodic word checks; and 3) Mixed scrubbing, which combines both probabilistic and deterministic scrubbing approaches. the research encompasses the estimation of reliability and Mean Time to Failure (MTTF) values for each model. Notably, the findings highlight the superior performance of mixed scrubbing over simpler scrubbing methods in terms of reliability and MTTF.

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Geometrical Form Deviation and Defect analysis of SLM Processed Slender Parts Using Computer Vision Methodology 8th

Geometrical Form Deviation and Defect Analysis of SLM Proces...

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8th International and 29th All India Manufacturing Technology, design and Research conference, AIMTDR 2021

作者： Kaushik, Brahmansh Anand Kumar, S. Rajkumar, V. Additive Manufacturing Research Laboratory Department of Mechanical Engineering Indian Institute of Technology Jammu Jammu and Kashmir181221 India

ISBN: (纸本)9789811976117

the proposed work shows the application of a computer vision algorithm in the selective laser melting (SLM) process for in situ monitoring of additively manufactured products. this method provided real-time monitoring of each deposited layer. Real-time monitoring facilitates the decisions regarding the continuation or termination of the production process, resulting in waste management. the approach proposed is independent of layer number, which makes this assessment more robust. the monitoring is performed by capturing the layer image after completing the laser melting process. the captured image is analyzed with the help of computer vision algorithms. the proposed approach is demonstrated using a CAD model of T-joint. this CAD model is sliced into a total of 10 layers. these ten layers are simulated and analyzed considering all possible defects conditions. An additional approach is also showcased to help identify the deviation caused by any possible errors during the process. this deviation analysis can capture the deviation present in any location of the layer. this approach works on the sectional analysis of the layer. All the results show the potential of quality control for bulk manufacturing and industrial application. © 2023, the Author(s), under exclusive license to Springer Nature Singapore Pte Ltd.

关键词： Quality control

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Analytical and numerical analysis of anchored flexible steel liquid storage tanks subjected to seismic loads considering soil structure interaction 8th

Analytical and numerical analysis of anchored flexible steel...

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8th International conference on Structural engineering, Mechanics and Computation (SEMC)

作者： Pourbehi, M. S. Strasheim, Javb Georgiadis, M. Cape Peninsula Univ Technol Cape Town South Africa Stellenbosch Univ Stellenbosch South Africa VPE Engn Serv Durban South Africa

ISBN: (纸本)9781003348450;9781032391144

this paper deals with the seismic design of modular steel water storage tanks designed and manufactured with Zincalume (c) steel panels. the tanks have a novel design and do not have bottom plates. they are fitted with a synthetic liner, are stiffened with vertical wind girts and are anchored to a concrete ring beam at the bottom of each wind girt using holding down bolts. Due to the high radius to wall thickness ratio (R/tw) of these tanks, the structural performance, interaction with the stored fluid and the foundation soil under dynamic loads, have not been well understood. In the research reported, the effect of seismic loads on the global structural behaviour of these tanks such as base shear, overturning moment, circumferential stress as well as buckling behaviour of the thin metal panels is studied using both analytical and numerical Finite Element Method (FEM) analyses. Parametric studies using spring-mounted mass analogy techniques specified by the American Petroleum Institute code (API650) and the New Zealand Society for Earthquake engineering recommendation (NZSEE) are conducted for three tanks with different fluid height to tank radius ratios (Hw/R).

关键词： Water supply

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design and Simulation analysis of thin Film for Continuously Variable Filter

Design and Simulation Analysis of Thin Film for Continuously...

引用

International conference on Information systems engineering (ICISE)

作者： Xiaodan Gao Wuhan Donghu University Wuhan China

Continuously variable filter based on Fabry-Perot interference was studied in the paper. A thin film interference signal transmission model whose spectral characteristics are continuously variable with spatial direction was established. According to the design specifications of continuously variable thin film filter with wide band and high dispersion coefficient, and were selected as high and low refractive index materials respectively, the TFCalc thin film design software was used to optimize the design of narrowband filter film by the variable metric method, and the cascade mode of symmetric film stacks with different center wavelengths was used to design broadband cut-off film to broaden the cut-off band. the designed formula has a continuously varying film thickness distribution along the spatial direction of the substrate, so that the center wavelength of the bandpass filter at each position along the spatial direction of the filter is linearly distributed. the designed filter can obtain a spectral gradient of 650-1050nm within the effective working region of 12mm, and the linear dispersion coefficient is 33.33nm/mm. the single-piece integrated multi-channel filtering is realized, which fully meets the requirements of miniaturization, wide working band and high spectral efficiency.

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design of an EEG analytical methodology for the analysis and interpretation of cerebral connectivity signals 8

Design of an EEG analytical methodology for the analysis and...

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8th International conference on Information Technology and Quantitative Management (ITQM) - Developing Global Digital Economy after COVID-19

作者： Cordova, Felisa M. Cifuentes, Hugo F. Diaz, Hernan A. Yanine, Fernando Pereira, Robertino Univ Finis Terrrae Fac Engn Sch Engn Pedro de Valdivia 1509 Providencia 7500000 Chile Univ Santiago Chile Dept Math & Comp Sci Fac Sci Av Alameda Libertador Bernardo OHiggins 3363 Santiago 9170002 Chile Tobii Pro Latam SpA Almirante Pastene 244 Providencia 7500000 Chile

the objective of this study is to design an Electroencephalographic (EEG) analytic methodology that allows to develop a variety of analysis and interpretations of brain signals. the initial phase considers the acquisition and filtering of EEG signals, the division into bands in data ranges, and the storage of EEG signals in a cloud data base. then, an analytical phase considering descriptive, predictive and prescriptive analysis is accomplished. A sequence of analytic intermediate processing steps is done in order to render a graphic visualization of significant correlations between pairs of EEG channels. Pearson correlation is utilized to detect synchronic connectivity through the brain areas. Time series in nearly instantaneous time lapses are treated by using Hilbert Huang Transform. An experimental design by submitting a set of students to an abbreviated version Raven visual test is made providing results in correlation maps of cerebral connectivity. (C) 2021 the Authors. Published by Elsevier B.V.

关键词： EEG Analytic Methodology EEG Signal analysis Cerebral Connectivity

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the Application of CAN Communication in Operating Parameters Measurement System of Jeep CJ-6 for Educational Purposes 7

The Application of CAN Communication in Operating Parameters...

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7th International conference on Green Technology and Sustainable Development, GTSD 2024

作者： Pham, Quang T.D. Tran, Long M.H. Le, Minh D. Le, Huy M. Nguyen, Tuan P. Vu, thang V. Tran, Long Dang Ho Chi Minh City University of Technology Faculty of Transportation Engineering VNU-HCM Ho Chi Minh City Viet Nam

ISBN: (纸本)9798350386073

this study explores the application of Controller Area Network (CAN) in real-time performance data acquisition, focusing on identifying operational parameters for an experimental Jeep CJ -6 model. Utilizing an S TM8S microcontroller integrated with CAN, data collected from each sensors is transmitted to six slave nodes, with one master node displaying data from these nodes. the paper details the system structure, CAN design procedures, and data retrieval using the STM8S microcontroller. Validation of acquired data employs conventional comparison methods, detailed analysis is conducted on parameters determination and verification. © 2024 IEEE.

关键词： Microcontrollers

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Structural redundancy and robustness analysis of highway bridge superstructures 11th

Structural redundancy and robustness analysis of highway bri...

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11th International conference on Bridge Maintenance, Safety and Management, IABMAS 2022

作者： Fiorillo, G. Ghosn, M. Deaprtment of Civil Engineering University of Manitoba Winnipeg Canada Department of Civil Engineering The City College of New York CUNY New York United States

ISBN: (纸本)9781032345314

Highway bridges are often analyzed as a set of isolated members that do not properly represent the performance of the entire structural system. therefore, performance-based design and system-level assessment methods are becoming the preferred approaches for evaluating the safety of these structures, in particular when bridges are subjected to long term deterioration as well as sudden localized failures. the objective of this paper is to quantify the effect of random damage to bridge elements and how this affects the robustness of the entire superstructure system. the paper also compares the load factors that cause the failure of bridges subjected to different truck load configurations. the results of the analysis show that load factors to failure for members and intact systems can be modelled by a log-normal distribution while those for damaged structures follow a decaying exponential function. © 2022 the Author(s).

关键词： Highway bridges

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