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RESEARCH ON LANDCOVER CLASSIFICATION SOLUTIONS FROM OPTICAL REMOTE SENSING IMAGES USING CONVOLUTIONAL NEURAL NETWORKS 基于卷积神经网络的光学遥感影像土地覆盖分类方法研究
Journal of Science and Technique - Section on Special Construction Engineering Pub Date : 2023-06-30 DOI: 10.56651/lqdtu.jst.v6.n01.664.sce
D. Mai
{"title":"RESEARCH ON LANDCOVER CLASSIFICATION SOLUTIONS FROM OPTICAL REMOTE SENSING IMAGES USING CONVOLUTIONAL NEURAL NETWORKS","authors":"D. Mai","doi":"10.56651/lqdtu.jst.v6.n01.664.sce","DOIUrl":"https://doi.org/10.56651/lqdtu.jst.v6.n01.664.sce","url":null,"abstract":"With the explosion of data and information, data analysis techniques are becoming increasingly important. Remote sensing image data has many advantages in analyzing features of the earth's surface due to its wide coverage and frequent updating. However, with the strong development of remote sensing technology, the source of remote sensing image data has increased rapidly. This requires powerful tools to solve problems on this data source. In recent years, artificial intelligence is developing rapidly and is one of the extremely powerful data analysis tools in many fields, including remote sensing image data. In this article, we present a solution to apply the convolutional neural network (CNN) to classify landcovers from remote sensing image data. The landcover classification experiment shows that the application of the convolutional neural network model can give classification results with an accuracy of over 95%. Meanwhile, the RF model only gives results with less than 90% accuracy. This result shows great potential for the application of deep learning models in remote sensing image analysis.","PeriodicalId":412800,"journal":{"name":"Journal of Science and Technique - Section on Special Construction Engineering","volume":"33 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116156074","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 OF THEORETICAL BASIS FOR ASSESSING THE BEARING CAPACITY OF AIRPORT CEMENT CONCRETE PAVEMENT IN VIETNAM BY THE DYNAMIC DEFLECTION EQUIPMENT 动力挠度仪评定越南机场水泥混凝土路面承载力的理论依据分析
Journal of Science and Technique - Section on Special Construction Engineering Pub Date : 2023-06-30 DOI: 10.56651/lqdtu.jst.v6.n01.667.sce
Van Thuy Do
{"title":"ANALYSIS OF THEORETICAL BASIS FOR ASSESSING THE BEARING CAPACITY OF AIRPORT CEMENT CONCRETE PAVEMENT IN VIETNAM BY THE DYNAMIC DEFLECTION EQUIPMENT","authors":"Van Thuy Do","doi":"10.56651/lqdtu.jst.v6.n01.667.sce","DOIUrl":"https://doi.org/10.56651/lqdtu.jst.v6.n01.667.sce","url":null,"abstract":"This article presents the theoretical basis of the backcalculation method for determining the bearing capacity of the airport cement concrete pavement on the basis of the deflection data obtained in the field and the calculation results according to specialized software of the dynamic deflection equipment. Through experimental data of measuring actual deflection at taxiway S in Tan Son Nhat airport, compare the calculated bearing capacity according to the backcalculation theory and outputted value from the software has an error of 4% to 7%. It can be seen that, the backcalculation method of bearing capacity in cement concrete pavement according to the theory of multi-layer system structure gives similar results with the results calculated according to the specialized software of dynamic deflection equipment. The research results serve as the basis for evaluating the ability to use the existing dynamic deflection equipment in the world, for assessing the bearing capacity of the airport cement concrete pavement in the conditions of Vietnam.","PeriodicalId":412800,"journal":{"name":"Journal of Science and Technique - Section on Special Construction Engineering","volume":"4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114857544","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
USING A DISCRETE EVENT SIMULATION TOOL TO PREDICT THE SPEED OF SMALL CROSS SECTION TUNNELING BY DRILLING AND BLASTING METHOD 利用离散事件模拟工具对钻爆法小断面掘进速度进行了预测
Journal of Science and Technique - Section on Special Construction Engineering Pub Date : 2023-06-30 DOI: 10.56651/lqdtu.jst.v6.n01.670.sce
T. T. Nguyen
{"title":"USING A DISCRETE EVENT SIMULATION TOOL TO PREDICT THE SPEED OF SMALL CROSS SECTION TUNNELING BY DRILLING AND BLASTING METHOD","authors":"T. T. Nguyen","doi":"10.56651/lqdtu.jst.v6.n01.670.sce","DOIUrl":"https://doi.org/10.56651/lqdtu.jst.v6.n01.670.sce","url":null,"abstract":"Compared to medium- and large-sized underground tunnels, construction of small cross section tunnels has different conditions: in terms of construction organization space, vehicles and workers especially transportation in narrow roads thatonly one vehicle is allowed to pass. This article studies the small cross section tunneling construction in rocks with different coefficients of consolidation (fkp) and predicts the tunneling construction speed for the narrow segment by using EZStrobe software to simulate. The results are compared with the baseline model in case without narrow segmentation, and also indicate a reasonable number of transport vehicles should be used.","PeriodicalId":412800,"journal":{"name":"Journal of Science and Technique - Section on Special Construction Engineering","volume":"20 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114893909","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
EFFECT OF SEA SAND WITH DIFFERENT CHLORIDE ION CONTENTS ON THE PROPERTIES OF CONCRETE 不同氯离子含量的海砂对混凝土性能的影响
Journal of Science and Technique - Section on Special Construction Engineering Pub Date : 2023-06-30 DOI: 10.56651/lqdtu.jst.v6.n01.671.sce
Kim Thu Le
{"title":"EFFECT OF SEA SAND WITH DIFFERENT CHLORIDE ION CONTENTS ON THE PROPERTIES OF CONCRETE","authors":"Kim Thu Le","doi":"10.56651/lqdtu.jst.v6.n01.671.sce","DOIUrl":"https://doi.org/10.56651/lqdtu.jst.v6.n01.671.sce","url":null,"abstract":"This article presents the results of a study that evaluated the effects of using sea sand with varying contents of chloride ions on the properties of concrete, including physical and mechanical properties as well as durability. The study was carried out on the sea sand samples with different chloride ion contents, including as-received sea sand samples with a chloride ion content of approximately 0.15%, two washed (desalted) sea sand samples with chloride ion content of 0.024% and 0.05%, and sea sand samples added with chloride salt (0.375%), which were then compared with river sand samples. The sand samples had approximately the same fineness modulus ranging from 2.3-2.5. The research results indicated that compared with washed sea sand and river sand, concrete mixes using sea sand with high chloride ion content increased the mixing water and reduced the slump retainability of the fresh concrete. Furthermore, early compressive strength (7 days) increased but late age strength (91 and 365 days) decreased in both standard curing and wet-dry circle curing cases. Additionally, the impermeability (water and chloride ion) and the ability to protect the reinforcement from corrosion in concrete were reduced when using sea sand with high chloride ion content compared to washed sea sand and river sand.","PeriodicalId":412800,"journal":{"name":"Journal of Science and Technique - Section on Special Construction Engineering","volume":"9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129747865","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 RELATIONSHIP BETWEEN LAND USE/LAND COVER AND AEROSOL OPTICAL DEPTH VARIATION IN HANOI CITY 河内市土地利用/土地覆被与气溶胶光学深度变化的关系
Journal of Science and Technique - Section on Special Construction Engineering Pub Date : 2023-06-30 DOI: 10.56651/lqdtu.jst.v6.n01.666.sce
D. Vu
{"title":"THE RELATIONSHIP BETWEEN LAND USE/LAND COVER AND AEROSOL OPTICAL DEPTH VARIATION IN HANOI CITY","authors":"D. Vu","doi":"10.56651/lqdtu.jst.v6.n01.666.sce","DOIUrl":"https://doi.org/10.56651/lqdtu.jst.v6.n01.666.sce","url":null,"abstract":"This study investigates the relationship between AOD variation and different land use/land cover (LULC) types. These LULC types were first classified from Landsat 9 images using the maximum likelihood classification (MLC) method. The AOD variation for each LULC type acquired from MODIS imagery was then extracted using the mask method. The statistical parameters for the AOD variation in each LULC were summarized and compared. It was found that there existed a close relationship (a positive correlation) between the AOD variation and water bodies and built-up land. Lower AOD values were usually distributed in greening land and crop land whereas the lowest AOD values were mainly concentrated in forest and river sand.","PeriodicalId":412800,"journal":{"name":"Journal of Science and Technique - Section on Special Construction Engineering","volume":"18 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122519148","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
RESEARCH ON THE APPLICATION OF GRATING PLATE AS BRIDGE DECK SLAB IN BAILEY QUICK ASSEMBLY BRIDGE 格栅板作为桥面板在贝利快速装配桥中的应用研究
Journal of Science and Technique - Section on Special Construction Engineering Pub Date : 2023-06-30 DOI: 10.56651/lqdtu.jst.v6.n01.673.sce
Manh Thuong Nguyen
{"title":"RESEARCH ON THE APPLICATION OF GRATING PLATE AS BRIDGE DECK SLAB IN BAILEY QUICK ASSEMBLY BRIDGE","authors":"Manh Thuong Nguyen","doi":"10.56651/lqdtu.jst.v6.n01.673.sce","DOIUrl":"https://doi.org/10.56651/lqdtu.jst.v6.n01.673.sce","url":null,"abstract":"This article presents the calculation of the bearing capacity of the light-weight deck slab assembled from grating plates. The author uses the software SAP2000 on the basis of the finite element method to test the strength of this deck slab under the load of vehicles. From there, conclusions are drawn to build a scientific basis to determine the possibility of using grating plates as deck slabs for quick-assembled bridges serving security, defense, and rescue missions.","PeriodicalId":412800,"journal":{"name":"Journal of Science and Technique - Section on Special Construction Engineering","volume":"40 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133958230","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
IDENTIFICATION OF THE NATURAL FREQUENCY OF THE OFFSHORE TRUSS STRUCTURE FROM MULTIPLE SIMULATED MEASURED DATA 基于多个模拟实测数据的海上桁架结构固有频率识别
Journal of Science and Technique - Section on Special Construction Engineering Pub Date : 2023-06-30 DOI: 10.56651/lqdtu.jst.v6.n01.674.sce
Dinh Huong Vu
{"title":"IDENTIFICATION OF THE NATURAL FREQUENCY OF THE OFFSHORE TRUSS STRUCTURE FROM MULTIPLE SIMULATED MEASURED DATA","authors":"Dinh Huong Vu","doi":"10.56651/lqdtu.jst.v6.n01.674.sce","DOIUrl":"https://doi.org/10.56651/lqdtu.jst.v6.n01.674.sce","url":null,"abstract":"This article presents identification methods of the natural frequency of structures from single or multiple measurements in the frequency domain and its application to identify the natural frequencies of the offshore truss structure. The simulated measurements of structural vibrations in the time domain are determined by analyzing the finite element model of the offshore truss structure subjected to random dynamic loads using SAP2000 software. The frequency domain measurements are obtained by the fast Fourier transform of time domain measurements using MATLAB software. The identification method from the multiple combined frequency response function measurements can estimate more natural frequencies than using a single measurement. A study of the considered frequency range was also performed showing the accuracy of the identification methods compared with the finite element model. By subdividing the considered frequency range, it is possible to improve the accuracy of the obtained natural frequencies.","PeriodicalId":412800,"journal":{"name":"Journal of Science and Technique - Section on Special Construction Engineering","volume":"34 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133996076","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
EFFECT OF THE DISTANCE BETWEEN TWIN TUNNELS ON THE INTERNAL FORCES IN THEIR LININGS UNDER THE IMPACT OF EARTHQUAKES - A CASE STUDY IN HANOI 地震作用下双隧道间距对隧道衬砌内力的影响——以河内为例
Journal of Science and Technique - Section on Special Construction Engineering Pub Date : 2023-06-30 DOI: 10.56651/lqdtu.jst.v6.n01.665.sce
N. A. Vu
{"title":"EFFECT OF THE DISTANCE BETWEEN TWIN TUNNELS ON THE INTERNAL FORCES IN THEIR LININGS UNDER THE IMPACT OF EARTHQUAKES - A CASE STUDY IN HANOI","authors":"N. A. Vu","doi":"10.56651/lqdtu.jst.v6.n01.665.sce","DOIUrl":"https://doi.org/10.56651/lqdtu.jst.v6.n01.665.sce","url":null,"abstract":"Calculating earthquake-resistant underground structures is becoming more and more important in general design, many civil structures in the field of constructions over the world have used different tools to calculate this problem. However, among of them, there are few publications which are interested in the influence of the distance between the two tunnels on the internal forces occurring in the tunnel linings. On the basis of using the commercial software Plaxis, the input data is the acceleration graph generated under the condition of matching the response spectrum in accordance with the conditions in Hanoi. This is done by computing with models in case of the distance between the two tunnels increases. The results show a significant influence of the distance between the two tunnels, when their distance is less than 3 times the tunnel diameter, this effect will decrease in case of the larger distance.","PeriodicalId":412800,"journal":{"name":"Journal of Science and Technique - Section on Special Construction Engineering","volume":"42 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115835305","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
BATHYMETRIC MAPPING OF CO TO ISLAND AREA, QUANG NINH PROVINCE USING SENTINEL-2 AND LANDSAT 8 IMAGES 利用sentinel-2和landsat 8图像对广宁省co - to - island地区进行水深测绘
Journal of Science and Technique - Section on Special Construction Engineering Pub Date : 2023-06-30 DOI: 10.56651/lqdtu.jst.v6.n01.663.sce
N. H. Nguyen
{"title":"BATHYMETRIC MAPPING OF CO TO ISLAND AREA, QUANG NINH PROVINCE USING SENTINEL-2 AND LANDSAT 8 IMAGES","authors":"N. H. Nguyen","doi":"10.56651/lqdtu.jst.v6.n01.663.sce","DOIUrl":"https://doi.org/10.56651/lqdtu.jst.v6.n01.663.sce","url":null,"abstract":"This study developed an automated depth mapping methodology based on the surface reflection datasets of Landsat 8 and Sentinel-2 satellite imagery in Google Earth Engine. The study was conducted in the area of Co To island, Co To district, Quang Ninh province. The results of the study obtained a bathymetric map of the waters around the island, tested with 199 actual field measurement points for a coefficient of determination (R2 ) of 0.95 with Sentinel-2 images and 0.91 with Landsat 8 images. Besides, the root mean square error (RMSE) obtained with the result of the Sentinel-2 image and Landsat 8 image is 0.145 m and 0.195 m, respectively. The initial method shows automatic, fast, efficient, and reliable results in establishing depth maps in the ocean of Vietnam, especially in coastal and archipelago areas. In addition, the method also supports regular monitoring and updates.","PeriodicalId":412800,"journal":{"name":"Journal of Science and Technique - Section on Special Construction Engineering","volume":"32 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115373861","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
STUDYING THE FLOOD REGULATION CAPACITY OF THE RED RIVER UPSTREAM RESERVOIR TO OVERCOME INCIDENTS AT LIEN MAC DYKE 研究了红河上游水库克服连流MAC堤防事故的防洪能力
Journal of Science and Technique - Section on Special Construction Engineering Pub Date : 2023-06-30 DOI: 10.56651/lqdtu.jst.v6.n01.675.sce
Dang Giap Nguyen
{"title":"STUDYING THE FLOOD REGULATION CAPACITY OF THE RED RIVER UPSTREAM RESERVOIR TO OVERCOME INCIDENTS AT LIEN MAC DYKE","authors":"Dang Giap Nguyen","doi":"10.56651/lqdtu.jst.v6.n01.675.sce","DOIUrl":"https://doi.org/10.56651/lqdtu.jst.v6.n01.675.sce","url":null,"abstract":"This article presents a study on the flood regulation capacity of the upstream reservoirs of the Red River. One and two-dimensional numerical analyses have been carried out to simulate the hydraulic flow of the upstream reservoir and the downstream river network. The effectiveness of flood mitigation in a number of reservoi capacity scenarios have been estimated. Calculation results show that, the capacity of reservoirs of 5,553 million m3 would likely reduce the the flooded downstream area by 47,528 ha in case using a part of the capacity of the construction. The time when the reservoirs completely close the floodgates without discharging water to the downstream is from 27 to 30 hours, which is adequate for the Lien Mac dyke to be completely rectified within 24 hours.","PeriodicalId":412800,"journal":{"name":"Journal of Science and Technique - Section on Special Construction Engineering","volume":"21 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128691360","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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