Knowledge-Based Engineering and Sciences最新文献_第2页

Post-earthquake Fire Behavior of Steel Plate Shear Walls 钢板剪力墙地震后的防火性能

Knowledge-Based Engineering and Sciences Pub Date : 2022-08-31 DOI: 10.51526/kbes.2022.3.2.36-43

S. Dusak, Vail Karakale

{"title":"Post-earthquake Fire Behavior of Steel Plate Shear Walls","authors":"S. Dusak, Vail Karakale","doi":"10.51526/kbes.2022.3.2.36-43","DOIUrl":"https://doi.org/10.51526/kbes.2022.3.2.36-43","url":null,"abstract":"Recently steel plate shear walls were used as a lateral load-resisting system in multi-story buildings due to their significant stiffness and post-buckling strength. Typical steel plate shear walls consist of a steel plate acting as the main shear-resisting element that is welded to the boundary columns and beams. These shear walls are preferred more and more every day because they are ductile, lightweight, and economical. On the other hand, it is important to examine the behavior of thin steel plate shear walls in the event of a fire that may occur after an earthquake due to natural gas leakage or electrical contact. In this paper, the change in stiffness and displacements of a steel plate shear wall due to fire-induced temperature is investigated using a single-story and single-bay steel plate shear wall ABAQUS model. Furthermore, effect of steel plate yield strength on the shear wall behavior was investigated. In the case of using higher yield strength steel, better behavior in stiffness and beam deflection, and a smaller value in out-of-plane displacement of the plate were obtained. As a result of the analytical study, the out-of-plane displacement in the infill plate increased with temperature. When the model was exposed to high heat for 35 minutes, it was observed that the permanent lateral stiffness was reduced by half. In 40 minutes, it lost almost all of its rigidity. When the steel grade was increased to S275, the loss of rigidity time was prolonged.","PeriodicalId":254108,"journal":{"name":"Knowledge-Based Engineering and Sciences","volume":"77 3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-08-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122832634","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Design and Analysis of Radio Chaotic Circuit on Communication Network 通信网络无线电混沌电路的设计与分析

Knowledge-Based Engineering and Sciences Pub Date : 2022-08-31 DOI: 10.51526/kbes.2022.3.2.44-51

Jawad K. Husain, Hayder A. Naser

引用次数: 0

Gradient Boosting Hybridized with Exponential Natural Evolution Strategies for Estimating the Strength of Geopolymer Self-Compacting Concrete 梯度提升混合指数自然进化策略用于估算土工聚合物自密实混凝土的强度

Knowledge-Based Engineering and Sciences Pub Date : 2022-04-30 DOI: 10.51526/kbes.2022.3.1.1-16

Samuel Alves Basilio, L. Goliatt

{"title":"Gradient Boosting Hybridized with Exponential Natural Evolution Strategies for Estimating the Strength of Geopolymer Self-Compacting Concrete","authors":"Samuel Alves Basilio, L. Goliatt","doi":"10.51526/kbes.2022.3.1.1-16","DOIUrl":"https://doi.org/10.51526/kbes.2022.3.1.1-16","url":null,"abstract":"The current global demand to minimize carbon dioxide (CO2$) emissions from Portland cement manufacturing processes has led to the use of environmentally friendly additives in cement products. The so-called green cementitious composites have become increasingly essential in the design of cementitious composite mixtures, providing the environmental compatibility of concrete as a building material. Engineers face a difficult problem in predicting the mechanical properties of green composites due to their changing nature under various circumstances. Machine learning models then emerge as surrogate models to perform this difficult task. The very design of such models has become a challenge for machine learning. This study presents a gradient boosting algorithm hybridized with Natural Exponential Evolution Strategies inspired by nature to predict the mechanical properties of geopolymeric self-compacting concrete. The hybrid model is used to evolve the parameters, automating the selection of the best set of internal parameters to estimate the strength properties of geopolymer self-compacting concrete. Results show the predictive ability superiority of machine learning models and optimization algorithms hybridization compared to manually tuned models. In addition, this approach can minimize laboratory work, potentially optimize experimental design, and reduce sample production time and associated activity burden","PeriodicalId":254108,"journal":{"name":"Knowledge-Based Engineering and Sciences","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-04-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126668537","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 23

An Assessment of Urban Expansion Impacts on Land Transformation of Rajpur-Sonarpur Municipality 城市扩张对拉杰普尔-索纳普尔市土地转型的影响评价

Knowledge-Based Engineering and Sciences Pub Date : 2021-12-31 DOI: 10.51526/kbes.2021.2.3.34-53

B. Halder, Masoud Haghbin, A. Farooque

{"title":"An Assessment of Urban Expansion Impacts on Land Transformation of Rajpur-Sonarpur Municipality","authors":"B. Halder, Masoud Haghbin, A. Farooque","doi":"10.51526/kbes.2021.2.3.34-53","DOIUrl":"https://doi.org/10.51526/kbes.2021.2.3.34-53","url":null,"abstract":"Urban expansion, population pressure, and increasing industrialization are influenced the world's natural environment, increased climate change, and global warming. Land use and land cover (LULC) changes are occurring due to anthropogenic activities and the results are land transformation, thermal variation, heat stress, and massive vegetation loss, which is increased oxygen deficiency and air pollution. Remote sensing-based Landsat TM and OLI/TIRS data were used to identify the land transformation and the effect of urbanization in Rajpur-Sonarpur Municipality in the years 2000 and 2020. The Built-up land was increased due to anthropogenic activities and around 12.16% area has been increased. Similarly, the agricultural land has been increased by 2.10 km2 area and vegetation area has been decreased around 6.52 km2 in the study area. The vegetation degradation areas were located in the South, South-west, and central parts of this study area. Correspondingly, North, North-west and central parts have a noticeable amount of built-up area developed. During twenty years, 6.97°C temperature was increased due to urban expansion, population pressure, transportation accessibility, and other urban amenities. The overall accuracies of classification maps were 96.25% and 91.64 % and the kappa coefficients were 0.95 and 0.89 respectively.","PeriodicalId":254108,"journal":{"name":"Knowledge-Based Engineering and Sciences","volume":"32 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128927533","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 19

USING NON-DESTRUCTIVE TESTS FOR EVALUATING FLYOVER FOOTBRIDGE: CASE STUDY 使用无损测试评估天桥行人天桥:个案研究

Knowledge-Based Engineering and Sciences Pub Date : 2020-12-31 DOI: 10.51526/kbes.2020.1.01.23-39

A. Shubbar, Z. Al-khafaji, M. Nasr, M. Falah

{"title":"USING NON-DESTRUCTIVE TESTS FOR EVALUATING FLYOVER FOOTBRIDGE: CASE STUDY","authors":"A. Shubbar, Z. Al-khafaji, M. Nasr, M. Falah","doi":"10.51526/kbes.2020.1.01.23-39","DOIUrl":"https://doi.org/10.51526/kbes.2020.1.01.23-39","url":null,"abstract":"The concrete structures deterioration in the last few decades required effective methods for evaluating and maintaining the structure condition. Currently, assessing the performance and safety of reinforced concrete (RC) structures relies on routine-based visual inspection (VI). However, there are another non-destructive test (NDT) technique that can provide a more accurate assessment of the structures. Thus, in this study, a footbridge located in Liverpool, UK is chosen as a case study and has NDT techniques used for assessment. The main objective of this research is to determine the condition of structural bridge components and investigate its level of defect and deterioration using non-destructive tests. The methodologies involved are visual inspection, and NDT techniques include the rebound hammer, cover meter, Moisture Content & Depth of Carbonation Testing, Chloride Testing and Half Cell Test. The framework, when implemented with the best selection of NDT techniques, helps in determining the level of defect and deterioration of the structural bridge components and next recommendation regarding the condition of the bridge. The involved bridge structural components include column, deck, wall and staircase. Findings from the visual inspection show that there were many defects and deteriorations found at the structural bridge components, which includes crack, spalling, and delamination and rusting. Further, NDT techniques that were carried out at the selected bridge structural part shows that some of the components exhibited a moderate risk of corrosion and acceptable concrete surface quality. In general, further maintenance is needed specifically to some critical structural components of the bridge.","PeriodicalId":254108,"journal":{"name":"Knowledge-Based Engineering and Sciences","volume":"112 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125958671","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 17

ON THE EVALUATION OF THE GRADIENT TREE BOOSTING MODEL FOR GROUNDWATER LEVEL FORECASTING 梯度树提升模型在地下水位预报中的评价

Knowledge-Based Engineering and Sciences Pub Date : 2020-12-31 DOI: 10.51526/kbes.2020.1.01.48-57

Sujay Raghavendra Naganna, B. H. Beyaztas, N. Bokde, A. Armanuos

{"title":"ON THE EVALUATION OF THE GRADIENT TREE BOOSTING MODEL FOR GROUNDWATER LEVEL FORECASTING","authors":"Sujay Raghavendra Naganna, B. H. Beyaztas, N. Bokde, A. Armanuos","doi":"10.51526/kbes.2020.1.01.48-57","DOIUrl":"https://doi.org/10.51526/kbes.2020.1.01.48-57","url":null,"abstract":"Though groundwater is a replenishable resource, it’s over exploitation has posed greater problem of its depletion. Hence, monitoring and forecasting of groundwater levels has become a primary task of governmental water boards/agencies for sustainable water management. The current study focused on evaluating the performance of Gradient Tree Boosting (GTB) model with that of conventional Adaptive Neuro-Fuzzy Inference System (ANFIS) and Group Method of Data Handling (GMDH) models in forecasting groundwater levels of two coastal aquifers. Data of two groundwater level monitoring wells penetrating into unconfined aquifers located at Shirtadi and Rayee near to Mangalore city of Karnataka state, India was considered in the present study. Monthly groundwater level data of the years 2000 – 2013 were used for model simulation; wherein 70% of data was used for model training and the remaining 30% served as testing data. Comparative result evaluation shows that the proposed GTB approach for one month ahead groundwater level forecasting was giving much accurate results than the other models for the same period of time and same set of data. For Rayee monitoring well, the error statistic, RRMSE of GTB, GMDH and ANFIS models obtained during test phase were 0.473, 0.517 and 0.7522, respectively. The comparison is examined further with different performance metrics.","PeriodicalId":254108,"journal":{"name":"Knowledge-Based Engineering and Sciences","volume":"35 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125160590","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 34

TECHNICAL AND ECONOMIC FEASIBILITY OF SOLAR IRRIGATION PUMPING SYSTEM: A REVIEW 太阳能灌溉抽水系统技术经济可行性综述

Knowledge-Based Engineering and Sciences Pub Date : 2020-12-31 DOI: 10.51526/kbes.2020.1.01.1-22

Lamine Diop

{"title":"TECHNICAL AND ECONOMIC FEASIBILITY OF SOLAR IRRIGATION PUMPING SYSTEM: A REVIEW","authors":"Lamine Diop","doi":"10.51526/kbes.2020.1.01.1-22","DOIUrl":"https://doi.org/10.51526/kbes.2020.1.01.1-22","url":null,"abstract":"Climate change has become a major constraint to the development of rain-fed agriculture due to the decline of rainfall. Therefore, irrigated agriculture is an alternative allowing farmers to have more access to water in order to meet crop water requirements. However, irrigated agriculture faces a major constraint related to the accessibility of energy sources used in pumping water. In general, the most common energy sources used in pumping water for irrigation are fuel and electricity. Nevertheless, they are very expensive, are not always accessible particularly in rural areas in Africa and have a negative impact on the environment; hence the need to find alternatives to solve this problem. This review focuses on the technical and economic feasibility of solar irrigation pumps and the impact of their use on the environment. Several aspects related to solar pumping have been discussed, namely the components of the solar pumping system, the energy source used, the principle of operation of the system, the technical, economic, and environmental feasibility. Reviews show that the use of solar irrigation pumps is a technically and economically feasible alternative in several areas with less environmental impact.","PeriodicalId":254108,"journal":{"name":"Knowledge-Based Engineering and Sciences","volume":"13 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115556934","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 3

OPTIMIZATION OF NICKEL CONTENT ON SOME PROPERTIES OF (NITI) SHAPE MEMORY ALLOY 优化镍含量对(niti)形状记忆合金某些性能的影响

Knowledge-Based Engineering and Sciences Pub Date : 2020-12-31 DOI: 10.51526/kbes.2020.1.01.40-47

N. S. Radhi, Karrar F. Morad, M. Hafiz, Alaa A. A, Aissa Bouaissi

{"title":"OPTIMIZATION OF NICKEL CONTENT ON SOME PROPERTIES OF (NITI) SHAPE MEMORY ALLOY","authors":"N. S. Radhi, Karrar F. Morad, M. Hafiz, Alaa A. A, Aissa Bouaissi","doi":"10.51526/kbes.2020.1.01.40-47","DOIUrl":"https://doi.org/10.51526/kbes.2020.1.01.40-47","url":null,"abstract":"Shape Memory Alloys (SMAs) are one of the most hopeful smart materials, especially, Nickel–Titanium (NiTi or Nitinol). These alloys are great and desirable due to their excellent reliability and behavior among all the commercially available alloys. In addition, strain recovery, (Ni–Ti) is granulated for a wide variety of medical uses because of its favorite properties such as fatigue behavior, corrosion resistance and biocompatibility. This paper explores the creation and the characterization of functionally graded (NiTi) materials. This work demonstrations the impact of Nickel contains changes on the characteristics of NiTi shape memory alloy, in order to obtain the suitable addition of Nickel contain, which gives the optimal balance between hardness, start and finish martensitic point, shape recovery and shape effect of alloys properties. These materials are prepared to obtain suddenly or gradually microstructure or composition differences inside the structure of one piece of material, the specimens made by powder metallurgy process and the influence of every layer of composite by; micro-hardness, transformation temperature DSC and shape effect. The hardness value and shape recovery decrease with increase nickel content. superior shape memory effect (SME) and shape recovery (SR) properties (i.e., 8.747, 10.270 for SMA-FGM1 SMA-FGM2 respectively, and SR is 1.735, 2.977 for SMA-FGM1 SMA-FGM2) respectively.\u0000 ","PeriodicalId":254108,"journal":{"name":"Knowledge-Based Engineering and Sciences","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129339998","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2

Impact of Increasing Pumping Discharge on Groundwater Level in the Nile Delta Aquifer, Egypt 增加抽水流量对埃及尼罗河三角洲含水层地下水位的影响

Knowledge-Based Engineering and Sciences Pub Date : 1900-01-01 DOI: 10.51526/kbes.2021.2.2.13-23

A. Armanuos, K. Ahmed, Mohammed Sanusi Shiru, M. Jamei

引用次数: 11

Dew Point Time Series Forecasting at the North Dakota 北达科他州露点时间序列预报

Knowledge-Based Engineering and Sciences Pub Date : 1900-01-01 DOI: 10.51526/kbes.2021.2.2.24-34

Bugrayhan Bickici Arikan, Luo Jiechen, Ibrahim I D Sabbah, A. Ewees, R. Homsi, S. Sulaiman

{"title":"Dew Point Time Series Forecasting at the North Dakota","authors":"Bugrayhan Bickici Arikan, Luo Jiechen, Ibrahim I D Sabbah, A. Ewees, R. Homsi, S. Sulaiman","doi":"10.51526/kbes.2021.2.2.24-34","DOIUrl":"https://doi.org/10.51526/kbes.2021.2.2.24-34","url":null,"abstract":"Hydrological time series forecasting is one of the hot topics in the domain of statistical hydrology. Providing accurate forecasting can contribute to diverse applications for catchment sustainability and management. Dew point temperature (Tdew) is one of the complex hydrological processes that highly essential to be quantified accurately for several catchment activities such as crops, agriculture, and others. In this study, three types of models’ recursive strategy, direct strategy, and DirRec which is the combination of recursive and direct strategies were adopted to obtain h-steps ahead predictions of Tdew. Ten years monthly scale dataset of Tdew at two meteorological stations (Beach and Cavalier) located at the North Dakota, USA, were used for the modeling development. The performance of the considered models was compared with two benchmark models: autoregressive moving average (ARIMA) and exponential smoothing (ETS). Modeling results indicated that, compared with the benchmark models, the proposed methods gave good results for the multi-ahead forecasting. For instance, for Cavalier station, the root mean squared prediction errors obtained from the proposed and benchmark methods when the forecast horizon is 12 are as follows: recursive strategy (RMSPE = 3.731) direct strategy (RMSPE = 3.385), DirRec (RMSPE = 3.141), ARIMA (RMSPE = 12.957), and ETS (RMSPE = 27.479).","PeriodicalId":254108,"journal":{"name":"Knowledge-Based Engineering and Sciences","volume":"13 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127436078","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 11