Archives for Technical Sciences最新文献

INFLUENCE OF DIFFERENT NUTRIENT SOURCES AND GENOTYPES ON THE CHEMICAL QUALITY AND YIELD OF LETTUCE 不同营养源和基因型对莴苣化学品质和产量的影响

IF 0.1

Archives for Technical Sciences Pub Date : 2023-11-27 DOI: 10.59456/afts.2023.1529.049m

Z. Malešević, Aleksandra Govedarica-Lučić, Ivana Bošković, Marko Petković, Dragutin Đukić, Vesna Đurović

引用次数: 0

SMART MINING: JOINT MODEL FOR PARAMETRIZATION OF COAL EXCAVATION PROCESS BASED ON ARTIFICIAL NEURAL NETWORKS 智能采矿：基于人工神经网络的煤炭挖掘过程参数化联合模型

IF 0.1

Archives for Technical Sciences Pub Date : 2023-11-27 DOI: 10.59456/afts.2023.1529.011t

Trivan Jelena, Srđan Kostić

{"title":"SMART MINING: JOINT MODEL FOR PARAMETRIZATION OF COAL EXCAVATION PROCESS BASED ON ARTIFICIAL NEURAL NETWORKS","authors":"Trivan Jelena, Srđan Kostić","doi":"10.59456/afts.2023.1529.011t","DOIUrl":"https://doi.org/10.59456/afts.2023.1529.011t","url":null,"abstract":"In the present paper we propose a new artificial neural network model for the estimation of coal cutting resistance and excavator performance as a nonlinear relationship between the examined input (excavator movement angle in the left and right direction, slice height and thickness, coal unit weight, compressive and shear strength) and output factors (excavator effective capacity, maximum current/power/force/energy consumption, linear and areal cutting resistance). We analyze the dataset collected from three open-pit coal mines in Serbia: Field D, Tamnava Eastern Field and Tamnava Western Field (all part of the Kolubara coal basin). The model is developed using a multilayer feed-forward neural network, with a Levenberg-Marquardt learning algorithm. Results of the preformed analysis indicate satisfying statistical accuracyof the developed model (R>0.9). Additionally, we analyze the individual effects of input factors on the properties of coal cutting resistance and performance of the excavator, by invokling the multiple linear regression. As a result, we single out the statististically significant and physically possible interactions between the individual controlling factors","PeriodicalId":41669,"journal":{"name":"Archives for Technical Sciences","volume":"30 1","pages":""},"PeriodicalIF":0.1,"publicationDate":"2023-11-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139227883","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

TIME DEPENDENT DEFORMATIONS OF A COUPLED BRIDGE: A CASE STUDY 耦合桥梁的随时间变化的变形：案例研究

IF 0.1

Archives for Technical Sciences Pub Date : 2023-11-27 DOI: 10.59456/afts.2023.1529.023c

Anđelko Cumbo, R. Folić

{"title":"TIME DEPENDENT DEFORMATIONS OF A COUPLED BRIDGE: A CASE STUDY","authors":"Anđelko Cumbo, R. Folić","doi":"10.59456/afts.2023.1529.023c","DOIUrl":"https://doi.org/10.59456/afts.2023.1529.023c","url":null,"abstract":"The bridge's span structure comprises a connected beam designed to support a concrete slab poured over parallel steel supports. Simultaneously, segmental construction, shrinkage, and the flow of concrete play a significant role in stress redistribution over time. The span construction is statically indeterminate due to its connections with the abutments, and temporal deformations occur under additional complex conditions. In this analysis, we employed a calculation model based on the layered finite elements method developed by the authors. This model can be utilized to analyse both statically indeterminate supports and the predicted phased construction method. It accounts for changes in the static system and loading, as well as variations in the layers within the coupled section and the viscous properties of the concrete over time. The calculation analysis results reveal that viscous concrete deformations, combined with different moments of activation of individual segments, have a significant impact on stress redistribution over time. Such intricate analyses are indispensable for ensuring the required safety and cost-effectiveness of the bridge span construction.","PeriodicalId":41669,"journal":{"name":"Archives for Technical Sciences","volume":"10 1","pages":""},"PeriodicalIF":0.1,"publicationDate":"2023-11-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139229516","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

THE IMPACT OF PUBLIC EVENTS ON THE USE OF SPACE: ANALYSIS OF THE MANIFESTATIONS IN LIBERTY SQUARE IN NOVI SAD 公共活动对空间利用的影响：对诺维萨德自由广场示威活动的分析

IF 0.1

Archives for Technical Sciences Pub Date : 2023-11-27 DOI: 10.59456/afts.2023.1529.075m

Tanja Mitrović, Milica Vracaric

引用次数: 0

RESEARCH OF MARLY ROCKS ON THE TERRAIN FORECASTED FOR CONSTRUCTION OF SILOS OBJECTS 在预测建造筒仓物体的地形上研究泥灰岩

IF 0.1

Archives for Technical Sciences Pub Date : 2023-11-27 DOI: 10.59456/afts.2023.1529.001dj

N. Đurić, Marko Đurić

{"title":"RESEARCH OF MARLY ROCKS ON THE TERRAIN FORECASTED FOR CONSTRUCTION OF SILOS OBJECTS","authors":"N. Đurić, Marko Đurić","doi":"10.59456/afts.2023.1529.001dj","DOIUrl":"https://doi.org/10.59456/afts.2023.1529.001dj","url":null,"abstract":"Complexity of geological terrain built demands different level of research in order to obtain all necessary characteristics for the establishing of connections between the structure of the objects and the terrain. Frequent changes of rocks in vertical profile and their irregular settling related to creasing of the terrain during geological history makes choosing representative parameters harder. Layers of similar characteristics that are interconnected are separated into geological environments by taking medium values of the parameters within that environment. During the research, for the purpose of constructing of the silos objects, boreholes were drilled in the axis of each silos to a depth of 10.0 m. In a small area, there is a complex structure of the terrain, which, in addition to changes in the lithological composition, is also dictated by tectonic activity. Directly in the hinterland of the research conducted with boreholes, there is an open terrain profile with a height of about 6.0 m. By connecting the layers from the investigation works and the open profile on the terrain, a clearer picture of their position on the narrow part of the terrain was obtained. Frequent changes of layers of marly rocks and sandstones and their synclinal deposition demanded separation of certain geological environments with layers of the same characteristics. In addition to taking samples for laboratory tests, field tests of the solubility of marly rocks in the void at different temperatures were also conducted. In parallel with the samples from the investigation works, samples from the open terrain profile were examined. The results showed a shorter dissolution time of marly rocks from the open terrain profile compared to the same rocks taken from the core of the borehole.","PeriodicalId":41669,"journal":{"name":"Archives for Technical Sciences","volume":"361 1","pages":""},"PeriodicalIF":0.1,"publicationDate":"2023-11-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139232050","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

ENVIRONMENTAL, SOCIAL AND OTHER NON-PROFIT IMPACTS OF MOUNTAIN STREAMS USAGE AS RENEWABLE ENERGY RESOURCES 将山涧用作可再生能源对环境、社会和其他非营利活动的影响

IF 0.1

Archives for Technical Sciences Pub Date : 2023-11-27 DOI: 10.59456/afts.2023.1529.057s

Ivan Stevović, Sabahudin Hadrović, Jovana Jovanović

{"title":"ENVIRONMENTAL, SOCIAL AND OTHER NON-PROFIT IMPACTS OF MOUNTAIN STREAMS USAGE AS RENEWABLE ENERGY RESOURCES","authors":"Ivan Stevović, Sabahudin Hadrović, Jovana Jovanović","doi":"10.59456/afts.2023.1529.057s","DOIUrl":"https://doi.org/10.59456/afts.2023.1529.057s","url":null,"abstract":"The main subject of this manuscript is mountain streams used by construction of small hydro power plants. The motivation for this research stemmed from a number of conflicting opinions about the justification of the construction of small hydropower plants and their facilities. This research encompasses different methods for the analysis of the justification of the construction of a small hydropower plant, starting from tradition in correlation with water mills, through a techno-economic approach to a complex multi-criteria research model. All methods are represented by objective formulas. World experiences are also presented, through the level of potential utilization, compared to the degree of development. The possible positive and negative impacts of the construction of such facilities for the exploitation of the potential of small watercourses were analyzed. After the conducted research, and with respect to the principle of minimum energy, which has become the paradigm of modern civilization, it can be concluded that using the potential of small watercourses by building small hydropower plants belongs to the domain of using renewable energy sources and that it is a function of sustainable development. Decision makers are recommended to exclusively apply a multi-criteria methodology, which can holistically include all technical, economic, environmental, social and other non-profitable but important impacts.","PeriodicalId":41669,"journal":{"name":"Archives for Technical Sciences","volume":"10 1","pages":""},"PeriodicalIF":0.1,"publicationDate":"2023-11-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139228061","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

ANALYSIS, COST ESTIMATION AND OPTIMIZATION OF REINFORCED CONCRETE SLAB STRENGTHENING BY STEEL AND CFRP STRIPS 钢筋和 CFRP 带加固钢筋混凝土板的分析、成本估算和优化

IF 0.1

Archives for Technical Sciences Pub Date : 2023-11-27 DOI: 10.59456/afts.2023.1529.035p

Ramona Petrov, Danica Goleš

{"title":"ANALYSIS, COST ESTIMATION AND OPTIMIZATION OF REINFORCED CONCRETE SLAB STRENGTHENING BY STEEL AND CFRP STRIPS","authors":"Ramona Petrov, Danica Goleš","doi":"10.59456/afts.2023.1529.035p","DOIUrl":"https://doi.org/10.59456/afts.2023.1529.035p","url":null,"abstract":"As a result of the planned change of use, the imposed load on the existing reinforced concrete mezzanine slab will be significantly increased, wherefore a diagnostics and assessment of the current state of the structure has been carried out. The control calculation showed that the slab does not have sufficient bearing capacity for the increased load. After qualitative analysis of possible strengthening methods, two methods were selected for detailed analysis: strengthening with steel strips and strengthening with carbon fiber-reinforced polimer (CFRP) plates. The criterion for choosing the optimal solution was the total cost of the material. It has been shown that the total price of materials for strengthening with steel strips is almost 40% lower than the price of strengthening with CFRP plates. It has also been observed that, when using steel strips, the contribution of the price of adhesive in the total cost of material is extremely high. When varying the level of strengthening, for imposed loads from 3 to 7.5 kN/m2, the ratio of the total costs of materials for steel and CFRP strips ranges between 60 and 73% and shows a slight tendency to increase with the increasment of loads.","PeriodicalId":41669,"journal":{"name":"Archives for Technical Sciences","volume":"5 1","pages":""},"PeriodicalIF":0.1,"publicationDate":"2023-11-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139232221","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

WBGT ANALYSIS OF THERMAL COMFORT OF THE AREA OF SEMBERIJA 对森贝里亚地区热舒适度的 WBGT 分析

IF 0.1

Archives for Technical Sciences Pub Date : 2023-11-27 DOI: 10.59456/afts.2023.1529.065dj

Dijana Djuric

{"title":"WBGT ANALYSIS OF THERMAL COMFORT OF THE AREA OF SEMBERIJA","authors":"Dijana Djuric","doi":"10.59456/afts.2023.1529.065dj","DOIUrl":"https://doi.org/10.59456/afts.2023.1529.065dj","url":null,"abstract":"Thermal comfort of urban areas is a highly researched field of science, which is gaining more and more importance in the field of ecology. The research of the area from the aspect of the convenience of physical activities and outdoor life provides data that is also useful in the health sector. This research included the area of Semberija in Bosnia and Herzegovina, which is characterized by unfavorable conditions during summer, due to high temperatures, swampy land and increased artificial presence of construction and industries. Not all areas have the same weather conditions, therefore other factors such as relief and presence of forests are important in the overall state of the area. Therefore, data from two meteorological stations, at a short distance from each other, but in a different natural and artificial environment, were analyzed. These are the station in the town of Bijeljina and the station within the Mine and Thermal Power Plant in Ugljevik. Within this research, the WBGT bioclimatic model was used, which is widely used in the world for the purposes of calculating the time that the human body can spend in direct sunlight during work or exercise, without rest. Given that the same time period is not covered, an average of 14 years (period 2005 – 2018) was analyzed for the area of Bijeljina, and an average of 8 years (period 2015 – 2022) for Ugljevik. The period from 2015 to 2018, which covers both locations, was also analyzed in order to make a comparison and notice the differences and determine the factors that affect the thermal comfort of the space.","PeriodicalId":41669,"journal":{"name":"Archives for Technical Sciences","volume":"36 1","pages":""},"PeriodicalIF":0.1,"publicationDate":"2023-11-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139233413","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

The analysis of the possibilities of using a virtual reality system in fitness training 虚拟现实系统在健身训练中的应用可能性分析

IF 0.1

Archives for Technical Sciences Pub Date : 2023-09-05 DOI: 10.31648/ts.9274

Szymon Nitkiewicz, Arnold Zaremba, Jakub Tytuła

{"title":"The analysis of the possibilities of using a virtual reality system in fitness training","authors":"Szymon Nitkiewicz, Arnold Zaremba, Jakub Tytuła","doi":"10.31648/ts.9274","DOIUrl":"https://doi.org/10.31648/ts.9274","url":null,"abstract":"Virtual reality is an amazing tool in the field of interaction, simulation, and entertainment between humans and computers. This technology is often used for recreational purposes in combination with physical activities. The main objective of this study was to compare intermittent training with continuous training on the shooting range. The first part of the article presents the essence of virtual reality and the possibilities that arise from its use. Then the created virtual environment, in which the shooter is located, and the way the study has been carried out are presented. The attempts of the participants were shown and evaluated. The realistic physics of movement and environment interactions have been designed into this map. The main aspects of the modelled and programmed shooting range were presented and their use has been described. The following section describes the research process and the analysis of the results of the test carried out on eight participants who had not previously been exposed to virtual reality. The test subjects were divided into two groups, one intermittent training and the other continuous training. The results of these groups were compared to assess which forms of training in a virtual reality environment were more beneficial.","PeriodicalId":41669,"journal":{"name":"Archives for Technical Sciences","volume":"21 1","pages":""},"PeriodicalIF":0.1,"publicationDate":"2023-09-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84660836","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

CONVERGENCE PROBLEMS WITH ANSYS'S SOLID 65 FINITE ELEMENT IN CONCRETE-FILLED TUBULAR (CFT) COLUMNS AS A CASE STUDY ANSYS solid65有限元在钢管混凝土柱中的收敛问题研究

IF 0.1

Archives for Technical Sciences Pub Date : 2023-06-01 DOI: 10.59456/afts.2023.1528.029b

Barghlame Hadi

引用次数: 0