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Cloud Computing and Internet of Things Concepts Applied on Buildings Data Analysis 云计算和物联网概念在建筑数据分析中的应用
Mathematical Modelling in Civil Engineering Pub Date : 2017-12-20 DOI: 10.1515/mmce-2017-0013
Florin-Adrian Hebean, S. Caluianu
{"title":"Cloud Computing and Internet of Things Concepts Applied on Buildings Data Analysis","authors":"Florin-Adrian Hebean, S. Caluianu","doi":"10.1515/mmce-2017-0013","DOIUrl":"https://doi.org/10.1515/mmce-2017-0013","url":null,"abstract":"Abstract Used and developed initially for the IT industry, the Cloud computing and Internet of Things concepts are found at this moment in a lot of sectors of activity, building industry being one of them. These are defined like a global computing, monitoring and analyze network, which is composed of hardware and software resources, with the feature of allocating and dynamically relocating the shared resources, in accordance with user requirements. Data analysis and process optimization techniques based on these new concepts are used increasingly more in the buildings industry area, especially for an optimal operations of the buildings installations and also for increasing occupants comfort. The multitude of building data taken from HVAC sensor, from automation and control systems and from the other systems connected to the network are optimally managed by these new analysis techniques. Through analysis techniques can be identified and manage the issues the arise in operation of building installations like critical alarms, nonfunctional equipment, issues regarding the occupants comfort, for example the upper and lower temperature deviation to the set point and other issues related to equipment maintenance. In this study, a new approach regarding building control is presented and also a generalized methodology for applying data analysis to building services data is described. This methodology is then demonstrated using two case studies.","PeriodicalId":233081,"journal":{"name":"Mathematical Modelling in Civil Engineering","volume":"24 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-12-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125109800","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: 1
Genetic Programming Technique Applied for Flash-Flood Modelling Using Radar Rainfall Estimates 遗传规划技术在基于雷达雨量估算的山洪模拟中的应用
Mathematical Modelling in Civil Engineering Pub Date : 2017-12-20 DOI: 10.1515/mmce-2017-0012
C. Dinu, R. Drobot, C. Pricop, Tudor Viorel Blidaru
{"title":"Genetic Programming Technique Applied for Flash-Flood Modelling Using Radar Rainfall Estimates","authors":"C. Dinu, R. Drobot, C. Pricop, Tudor Viorel Blidaru","doi":"10.1515/mmce-2017-0012","DOIUrl":"https://doi.org/10.1515/mmce-2017-0012","url":null,"abstract":"Abstract The rainfall-runoff transformation is a highly complex dynamic process and the development of fast and robust modelling instruments has always been one of the most important topics for hydrology. Over time, a significant number of hydrological models have been developed with a clear trend towards a process-based approach. The downside of these types of models is the significant amount of data required for building the model and for the calibration process: in practice, the collection of all necessary data for such models proves to be a difficult task. In order to cope with this issue, various data-driven modelling techniques have been introduced for hydrological modelling as an alternative to more traditional approaches, on the basis of their capacity of mapping out complex relationships from observation data. Having the capacity to generate meaningful mathematical structures as results, genetic programming (GP) presents a high potential for rainfall-runoff modelling as a data-driven method. Using ground and radar rainfall observation, the aim of this study is to investigate the GP technique capability for modelling the rainfall-runoff process, taking into consideration a flash-flood event.","PeriodicalId":233081,"journal":{"name":"Mathematical Modelling in Civil Engineering","volume":"47 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-12-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131152695","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: 4
Numerical Evaluation of the Solar Collectors Selfshading Related to their Building Integration 太阳能集热器自遮阳与建筑一体化的数值评价
Mathematical Modelling in Civil Engineering Pub Date : 2017-12-20 DOI: 10.1515/mmce-2017-0011
A. Damian, M. Alexandru, T. Catalina
{"title":"Numerical Evaluation of the Solar Collectors Selfshading Related to their Building Integration","authors":"A. Damian, M. Alexandru, T. Catalina","doi":"10.1515/mmce-2017-0011","DOIUrl":"https://doi.org/10.1515/mmce-2017-0011","url":null,"abstract":"Abstract In view of the recent preoccupation at worldwide level, for the integration of the solar systems components within the building skin, we made a numerical investigation in order to assess the opportunity to implement a long string of solar panels along a horizontal or vertical building surface.The study analyses deals with the phenomenon of self-shading, which appears in the case of medium and large solar systems that use solar panels placed one behind the other, along the same row (individual string), but also under the shape of parallel rows (parallel strings). The study creates a mathematical instrument for the evaluation of the shaded surface depending on the location of the panels and the relative position of the Sun. The shading-caused energy loss is analysed along the one-year period, for each of the 12 months, while the panels are considered either placed on a horizontal surface such as a building terrace, or on a vertical surface, such as a building facade. The simulations are made for six Romanian cities located in different climatic zones, characterized by different levels of solar radiation.","PeriodicalId":233081,"journal":{"name":"Mathematical Modelling in Civil Engineering","volume":"30 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-12-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130099747","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: 1
Functional Model to Estimate the Inelastic Displacement Ratio 估计非弹性位移比的功能模型
Mathematical Modelling in Civil Engineering Pub Date : 2017-12-20 DOI: 10.1515/mmce-2017-0010
Vlad Ceangu, D. Creţu
{"title":"Functional Model to Estimate the Inelastic Displacement Ratio","authors":"Vlad Ceangu, D. Creţu","doi":"10.1515/mmce-2017-0010","DOIUrl":"https://doi.org/10.1515/mmce-2017-0010","url":null,"abstract":"Abstract In this paper a functional model to estimate the inelastic displacement ratio as a function of the ductility factor is presented. The coefficients of the functional model are approximated using nonlinear regression. The used data is in the form of computed displacement for an inelastic single degree of freedom system with a fixed ductility factor. The inelastic seismic response spectra of constant ductility factors are used for generating data. A method for selecting ground-motions that have similar frequency content to that of the ones picked for the comparison is presented. The variability of the seismic response of nonlinear single degree of freedom systems with different hysteretic behavior is presented.","PeriodicalId":233081,"journal":{"name":"Mathematical Modelling in Civil Engineering","volume":"282 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-12-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131822159","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
FLASH-FLOOD MODELLING WITH ARTIFICIAL NEURAL NETWORKS USING RADAR RAINFALL ESTIMATES 利用雷达降雨量估算的人工神经网络模拟山洪暴发
Mathematical Modelling in Civil Engineering Pub Date : 2017-09-26 DOI: 10.1515/mmce-2017-0008
C. Dinu, R. Drobot, C. Pricop, Tudor Viorel Blidaru
{"title":"FLASH-FLOOD MODELLING WITH ARTIFICIAL NEURAL NETWORKS USING RADAR RAINFALL ESTIMATES","authors":"C. Dinu, R. Drobot, C. Pricop, Tudor Viorel Blidaru","doi":"10.1515/mmce-2017-0008","DOIUrl":"https://doi.org/10.1515/mmce-2017-0008","url":null,"abstract":"Abstract The use of artificial neural networks (ANNs) in modelling the hydrological processes has become a common approach in the last two decades, among side the traditional methods. In regard to the rainfall-runoff modelling, in both traditional and ANN models the use of ground rainfall measurements is prevalent, which can be challenging in areas with low rain gauging station density, especially in catchments where strong focused rainfall can generate flash-floods. The weather radar technology can prove to be a solution for such areas by providing rain estimates with good time and space resolution. This paper presents a comparison between different ANN setups using as input both ground and radar observations for modelling the rainfall-runoff process for Bahluet catchment, with focus on a flash-flood observed in the catchment.","PeriodicalId":233081,"journal":{"name":"Mathematical Modelling in Civil Engineering","volume":"83 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-09-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127191167","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: 5
EVALUATION OF THE POUNDING FORCES DURING EARTHQUAKE USING EXPLICIT DYNAMIC TIME INTEGRATION METHOD 用显式动力时间积分法计算地震冲击力
Mathematical Modelling in Civil Engineering Pub Date : 2017-09-26 DOI: 10.1515/mmce-2017-0009
G. Nica, Andrei Pricopie
{"title":"EVALUATION OF THE POUNDING FORCES DURING EARTHQUAKE USING EXPLICIT DYNAMIC TIME INTEGRATION METHOD","authors":"G. Nica, Andrei Pricopie","doi":"10.1515/mmce-2017-0009","DOIUrl":"https://doi.org/10.1515/mmce-2017-0009","url":null,"abstract":"Abstract Pounding effects during earthquake is a subject of high significance for structural engineers performing in the urban areas. In this paper, two ways to account for structural pounding are used in a MATLAB code, namely classical stereomechanics approach and nonlinear viscoelastic impact element. The numerical study is performed on SDOF structures acted by ELCentro recording. While most of the studies available in the literature are related to Newmark implicit time integration method, in this study the equations of motion are numerical integrated using central finite difference method, an explicit method, having the main advantage that in the displacement at the ith+1 step is calculated based on the loads from the ith step. Thus, the collision is checked and the pounding forces are taken into account into the equation of motion in an easier manner than in an implicit integration method. First, a comparison is done using available data in the literature. Both linear and nonlinear behavior of the structures during earthquake is further investigated. Several layout scenarios are also investigated, in which one or more weak buildings are adjacent to a stiffer building. One of the main findings in this paper is related to the behavior of a weak structure located between two stiff structures.","PeriodicalId":233081,"journal":{"name":"Mathematical Modelling in Civil Engineering","volume":"4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-09-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114670210","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
POPULATION PERSPECTIVE ON THE SOCIAL IMPACT OF A STRONG EARTHQUAKE AFFECTING BUCHAREST 从人口角度看影响布加勒斯特的强烈地震的社会影响
Mathematical Modelling in Civil Engineering Pub Date : 2017-09-26 DOI: 10.1515/mmce-2017-0007
I. Calotescu, F. Pavel, A. Săndulescu, Horea Sibișteanu, R. Văcăreanu
{"title":"POPULATION PERSPECTIVE ON THE SOCIAL IMPACT OF A STRONG EARTHQUAKE AFFECTING BUCHAREST","authors":"I. Calotescu, F. Pavel, A. Săndulescu, Horea Sibișteanu, R. Văcăreanu","doi":"10.1515/mmce-2017-0007","DOIUrl":"https://doi.org/10.1515/mmce-2017-0007","url":null,"abstract":"Abstract The paper presents a series of the results obtained from an extensive questionnaire survey conducted in Bucharest in 2016. The investigated topics are related to earthquake awareness and preparedness of the population currently living in the capital city of Romania, safety concerns and post-earthquake behaviour. Results are interpreted based on several criteria which characterize the target population such as age, education, income, children, as well as the type and year of construction of the building they inhabit. The questionnaire was completed by 1000 respondents and the main findings show that people are generally neither well informed nor prepared for a future major seismic event affecting Bucharest. However, the level of involvement in postearthquake situations is positive, the majority of respondents agreeing to offer humanitarian help in various forms as well as temporary shelter to people, especially relatives or friends.","PeriodicalId":233081,"journal":{"name":"Mathematical Modelling in Civil Engineering","volume":"18 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-09-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132885794","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: 1
Landslides Hazard Assessment Using Different Approaches 运用不同方法进行滑坡灾害评估
Mathematical Modelling in Civil Engineering Pub Date : 2017-06-27 DOI: 10.1515/mmce-2017-0004
C. Coman, S. Manea
{"title":"Landslides Hazard Assessment Using Different Approaches","authors":"C. Coman, S. Manea","doi":"10.1515/mmce-2017-0004","DOIUrl":"https://doi.org/10.1515/mmce-2017-0004","url":null,"abstract":"Abstract Romania represents one of Europe’s countries with high landslides occurrence frequency. Landslide hazard maps are designed by considering the interaction of several factors which, by their joint action may affect the equilibrium state of the natural slopes. The aim of this paper is landslides hazard assessment using the methodology provided by the Romanian national legislation and a very largely used statistical method. The final results of these two analyses are quantitative or semi-quantitative landslides hazard maps, created in geographic information system environment. The data base used for this purpose includes: geological and hydrogeological data, digital terrain model, hydrological data, land use, seismic action, anthropic action and an inventory of active landslides. The GIS landslides hazard models were built for the geographical area of the Iasi city, located in the north-east side of Romania.","PeriodicalId":233081,"journal":{"name":"Mathematical Modelling in Civil Engineering","volume":"22 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-06-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121904717","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: 1
Impact of Nocturnal Natural Ventilation On the Energy Consumption of Buildings 夜间自然通风对建筑能耗的影响
Mathematical Modelling in Civil Engineering Pub Date : 2017-06-27 DOI: 10.1515/mmce-2017-0005
Felicia Uciu, T. Catalina, Andreea Vartires, I. Colda
{"title":"Impact of Nocturnal Natural Ventilation On the Energy Consumption of Buildings","authors":"Felicia Uciu, T. Catalina, Andreea Vartires, I. Colda","doi":"10.1515/mmce-2017-0005","DOIUrl":"https://doi.org/10.1515/mmce-2017-0005","url":null,"abstract":"Abstract The analysis presented in this paper is dealing with the correct and energy efficient measures of cooling buildings through nocturnal natural ventilation. Using this solution is proved in this article to be efficient and can reduce substantially the cooling demand. In order to establish the factors influencing the process of passively cooling a building (the ventilation volume, exterior temperature, thermal capacity of the building, possible duration of the ventilation), we have chosen different buildings, which we have placed them in different temperature zones of Romania. The study is based on multiple simulations realized with a time step of one hour, with the following variations: the climatic parameters, the thermal characteristics of the building, the air flow during night time, the proposed interior temperature. Since the study consisted of numerous simulations, in order to treat the results we have used statistical methods that cover the practical and possible situations, and proved the efficiency of nocturnal ventilation.","PeriodicalId":233081,"journal":{"name":"Mathematical Modelling in Civil Engineering","volume":"13 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-06-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130517185","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: 1
Stability Analysis of a Coal Combustion Residuals Impoundment 某燃煤余热蓄水池稳定性分析
Mathematical Modelling in Civil Engineering Pub Date : 2017-06-27 DOI: 10.1515/mmce-2017-0006
M. Verdes
{"title":"Stability Analysis of a Coal Combustion Residuals Impoundment","authors":"M. Verdes","doi":"10.1515/mmce-2017-0006","DOIUrl":"https://doi.org/10.1515/mmce-2017-0006","url":null,"abstract":"Abstract The overall stability of the Rovinari dry ash slurry impoundment is analyzed using a coupled seepage-stability analysis with the Finite Element Method in a bidimensional model. To better understand the behavior of such a complex structure, based on the material properties presented in Table 2, the hypotheses presented in Table 4 and described as such, a number of 9 general hypotheses were analyzed, at 178.00 m a.s.l. deposit elevation and final designed height of approximately 35.30 m which corresponds to 191.3 m a.s.l.. The results are presented in tabular form, only 8 diagrams are selected which show the Factor of Safety for hypothesis 0 and 3 which are considered to best describe the real-life conditions regarding the boundary conditions used. The results show that even at maximum designed height, the deposit is stable in the most realistic worst-case hypothesis 3, with a Factor of Safety of 1.177.","PeriodicalId":233081,"journal":{"name":"Mathematical Modelling in Civil Engineering","volume":"34 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-06-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115788428","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
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