Science Discovery最新文献_第7页

Research on Rural Real Scene Model Measurement Based on POS Aerial Triangulation Technology 基于POS航空三角测量技术的农村实景模型测量研究

Science Discovery Pub Date : 2021-11-12 DOI: 10.11648/J.SD.20210906.18

Dang Bing, Shi Xingxi

{"title":"Research on Rural Real Scene Model Measurement Based on POS Aerial Triangulation Technology","authors":"Dang Bing, Shi Xingxi","doi":"10.11648/J.SD.20210906.18","DOIUrl":"https://doi.org/10.11648/J.SD.20210906.18","url":null,"abstract":"Rural development has always been one of the key and difficult problems in China, such as rural natural disaster monitoring, rural land resources and homestead management, rural cultural and tourism development, comprehensive management of rural environment and so on. In this paper, POS aerial triangulation technology is combined with rural areas, and the three-dimensional rural real scene is modeled and digitized, which brings a new idea to rural development and governance. In this paper, the consumer UAV is used to complete the rural low altitude aerial photography, and the rural 3D model reconstruction is completed based on the smart3d platform. The specific principle of POS assisted aerial triangulation is analyzed and the three-dimensional modeling process based on UAV aerial photography is displayed. Through experiments, it is verified that POS assisted aerial triangulation technology without ground control points can realize the 1:1 establishment of three-dimensional real scene model. The side length and height information can be read on the model, and the accuracy is high. At the same time, it puts forward the possibility and convenience of three-dimensional real scene model for house and land ownership registration. In the scene of site constraints and topographic conditions, POS assisted aerial triangulation without ground control points has the application value of emergency rescue, and has a certain practical significance for rural geological disaster monitoring.","PeriodicalId":21652,"journal":{"name":"Science Discovery","volume":"62 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-11-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82049335","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 Evolution and Ptotection of Kulangsu Historic International Settlement Under the Influence of Tourism Development 旅游发展影响下鼓浪屿历史国际聚落的演变与保护研究

Science Discovery Pub Date : 2021-10-28 DOI: 10.11648/J.SD.20210905.18

Chenxi Zhao

{"title":"Research on the Evolution and Ptotection of Kulangsu Historic International Settlement Under the Influence of Tourism Development","authors":"Chenxi Zhao","doi":"10.11648/J.SD.20210905.18","DOIUrl":"https://doi.org/10.11648/J.SD.20210905.18","url":null,"abstract":"China has a large number of world cultural heritage sites at present. On the one hand, the rise of tourism can promote the regional economic development. On the other hand, excessive commercialization also challenges the authenticity and integrity of heritage sites. Since Kulangsu has developed tourism since the late 1980s, the cultural ecology of the community has long been overwhelmed by the over-exploitation of tourism. Taking advantage of the opportunity of being registered on list of the world cultural heritage as the “ Historic International Settlement” in 2017, meeting the challenges of tourism commercialization and reviving the traditional community has become important issues for Kulangsu in the“ Post-Applying for the Heritage Era”. This paper, taking the Historic International Settlement of Kulangsu as an example, based on historical literature, through analysis, deduction and induction, first sorts out the historical context and unique values from the aspects of historical development, urban structure, and social economy, and then summarizes the four stages of the community’s evolution being influenced by the tourism development, reveals the alienation crisis faced by the community, constructs the development dynamic mechanism of the community. Finally, integrating the value judgment and development dynamic mechanism of Kulangsu, this paper puts forward the future sustainable development strategy of Kulangsu.","PeriodicalId":21652,"journal":{"name":"Science Discovery","volume":"3 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-10-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85073877","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 Mechanical Characteristics of Mountain Highway Section Surface Structure Based on Load 基于荷载的山地公路断面表面结构力学特性分析

Science Discovery Pub Date : 2021-10-19 DOI: 10.11648/J.SD.20210905.14

Zhang Zhigang, Wang Yue, Wang Wei, Qiao Jiangang

{"title":"Analysis of Mechanical Characteristics of Mountain Highway Section Surface Structure Based on Load","authors":"Zhang Zhigang, Wang Yue, Wang Wei, Qiao Jiangang","doi":"10.11648/J.SD.20210905.14","DOIUrl":"https://doi.org/10.11648/J.SD.20210905.14","url":null,"abstract":"Mountain roads have many kinds of diseases due to their special natural and geographical conditions, and it is difficult to maintain the road surface, so it is particularly important to analyze the causes of the diseases from the theoretical aspect, in order to explore the relationship between structural mechanical characteristics and load of mountain highway pavement, the finite element simulation method was used to study the compressive stress, structural layer displacement, compressive strain, transverse shear stress, longitudinal shear stress, and longitudinal shear of different pavement structure layer depths under load. Change trend of strain. The results show that the compressive stress, longitudinal shear stress, and transverse shear stress are mainly concentrated in the surface layer and have a relatively large impact on the surface layer; the displacement value, compressive strain, and longitudinal shear strain are larger in the surface layer, and the compressive strain and longitudinal shear strain are at the joint Sudden change occurs; as the load increases, the pavement displacement, compressive stress, longitudinal shear stress, compressive strain, longitudinal shear strain, and transverse shear stress of each structural layer gradually increase, the overall structure of the pavement changes, and the probability of road damage increases. It can be seen that the changes in mechanical characteristics of asphalt pavement under different loads and different depths provide a new research idea for mountain highway pavement protection.","PeriodicalId":21652,"journal":{"name":"Science Discovery","volume":"112 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-10-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87781220","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

A Brief Introduction to Han Fu and Han Dynasty Architectural Culture 简论汉赋与汉代建筑文化

Science Discovery Pub Date : 2021-10-19 DOI: 10.11648/J.SD.20210905.17

Yang Yang

{"title":"A Brief Introduction to Han Fu and Han Dynasty Architectural Culture","authors":"Yang Yang","doi":"10.11648/J.SD.20210905.17","DOIUrl":"https://doi.org/10.11648/J.SD.20210905.17","url":null,"abstract":"The Han Dynasty was in the rising stage of China's feudal society, with a strong state, prosperous economy and developed culture. During this period, there were many types of architecture and magnificent scale. Although recorded in historical documents, they are brief and scattered. In comparison, the most perfect display is indeed the Han Dynasty rhetoric. Han Fu is a kind of rhymed prose that emerged in the Han Dynasty, the so-called poetry and song, Fu is an independent genre in traditional Chinese literature. Despite the fact that there is no surviving Han Dynasty architecture, its main features can be glimpsed from the representative works of Han Fu. By virtue of their respective lives, the Hanfuists have truly reproduced the appearance of ancient architecture and revealed its cultural connotations, leaving extremely valuable architectural historical materials for future generations. From the existing Han Dynasty rhetoric, the portrayal of the capital city and its buildings take an important place. The article selects the representative works of capital cities and palaces in the Han fugue as the object of study. Through the depiction of cities and buildings in the fugue, it analyzes the characteristics of city building and architectural style in the Han Dynasty, highlighting the value and significance of architecture in the Han literati.","PeriodicalId":21652,"journal":{"name":"Science Discovery","volume":"15 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-10-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85849861","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

On the Research Value of "Food Landscape" Planning in the Process of New Urbanization 论新型城镇化进程中“食物景观”规划的研究价值

Science Discovery Pub Date : 2021-10-19 DOI: 10.11648/J.SD.20210905.16

Zhao Jie, W. Ye, W. Xuan

{"title":"On the Research Value of \"Food Landscape\" Planning in the Process of New Urbanization","authors":"Zhao Jie, W. Ye, W. Xuan","doi":"10.11648/J.SD.20210905.16","DOIUrl":"https://doi.org/10.11648/J.SD.20210905.16","url":null,"abstract":"With the steady and rapid progress of the new urbanization process, the integration of urban and rural development has also become one of the main tasks of territorial spatial planning. In optimizing urban space governance, the planning and protection of permanent basic farmland for food production is also urgently needed. Our country's grain planting area is huge, and grain production is of strategic significance related to the state's independence and the sustainable and stable development of society. This is clearly reflected in a series of important documents of the Party and the State. Many important social and economic development policies today directly lead to changes in the food landscape paradigm. The food landscape is closely related to the implementation of these economic, social, technological and other aspects of policies and is inseparable. However, it is still rare to consider grain farmland as a landscape for systematic research and planning. Through the definition and classification of food, its strategic significance and the proportion of land area requirements, and the value discussion in the international perspective, this paper preliminarily puts forward the research value and significance of food production as a special landscape planning in territorial spatial planning. Put forward the important reference value of \"food landscape\" for the formulation and implementation of major national policies in the future, the continuous and in-depth exploration of new urbanization, the promotion of sustainable and coordinated urban and rural development, and the change of people's living and production methods.","PeriodicalId":21652,"journal":{"name":"Science Discovery","volume":"27 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-10-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86184468","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

Optimization of Green Infrastructure Network in Fengdong New Town Based on MSPA and MCR Model 基于MSPA和MCR模型的丰东新城绿色基础设施网络优化

Science Discovery Pub Date : 2021-10-19 DOI: 10.11648/J.SD.20210905.15

Ting Wang, Yunying Ren

{"title":"Optimization of Green Infrastructure Network in Fengdong New Town Based on MSPA and MCR Model","authors":"Ting Wang, Yunying Ren","doi":"10.11648/J.SD.20210905.15","DOIUrl":"https://doi.org/10.11648/J.SD.20210905.15","url":null,"abstract":"The concept of life community integrating \"mountains, rivers, forests, farmlands, lakes, and grasslands\", proposed by the Chinese government, emphasizes the protection and restoration of ecosystem integrity. The construction of green infrastructure (GI) network can connect fragmented habitats, improve landscape connectivity, optimize ecological network, and thus maintain ecological security in the region. In addition, different from the ecological network, the GI network can establish a network structure with composite functions, better enrich regional biodiversity, protect historical and cultural resources, and guide rational development of leisure spaces. Taking Fengdong New Town of Xixianxi district in Xi'an as the research object and aiming at the composite functions of the GI network, this study analyzed the status quo of GI network construction by comprehensively using morphological spatial pattern analysis (MSPA), landscape connectivity analysis, and the minimum cumulative resistance (MCR) model. The following conclusions are drawn: (1) the distribution of green infrastructure in the research area is extremely uneven, the landscape is seriously fragmented, (2) the southern part of the research area has the most core sources and the best connectivity, there is no core source in the middle and east of the site, the connection also is poor, the ecological source distribution in the east and north of the site is more, but the fragmentation is serious and the connectivity is poor. Based on the above analysis results, the Optimization strategies were also proposed for the GI network in the study area, which involved adding more ecological sources and links, strengthening the construction of sites, and improving the integrity of the comprehensive GI network.","PeriodicalId":21652,"journal":{"name":"Science Discovery","volume":"41 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-10-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88846809","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

Study on the Strategy of Enhancing the Spatial Vitality of Streets in Historical Districts - Fengxiang as an Example 提升历史街区街道空间活力的策略研究——以凤翔街区为例

Science Discovery Pub Date : 2021-10-12 DOI: 10.11648/J.SD.20210905.13

Huang Xiaoyan, Miao Li

{"title":"Study on the Strategy of Enhancing the Spatial Vitality of Streets in Historical Districts - Fengxiang as an Example","authors":"Huang Xiaoyan, Miao Li","doi":"10.11648/J.SD.20210905.13","DOIUrl":"https://doi.org/10.11648/J.SD.20210905.13","url":null,"abstract":"As the main carrier of the evolution and development of historic districts, streets are the important foundation of street space, architectural texture and neighborhood vitality. However, in recent years, due to the inappropriate way of protecting the historic district and the rapid development of motorization, the spatial quality of the streets in the historic district has been declining and the vitality of the district has suffered a great impact. Located in Fengxiang District of Baoji City, Fengxiang Historic District has insufficient neighborhood vitality and poor spatial quality. In order to improve the vitality of the neighborhood and optimize the spatial quality of the neighborhood, we take \"Wenchangxiang-Tongwenxiang-Feltersxiang Historic District\" and \"Xinzhuangxiang Historic District\" in Fengxiang District as examples through a combination of qualitative description and quantitative analysis, and examine the causes of the lack of vitality of the neighborhood in terms of economy, culture and environment. The reasons for the lack of vitality of the neighborhoods are explored from three aspects. Finally, we propose the strategy to improve the vitality of the neighborhoods by upgrading the commercial space and creating diversified business modes, exploring the cultural connotation and forming regional linkage, and optimizing the neighborhood environment and strengthening the neighborhood management.","PeriodicalId":21652,"journal":{"name":"Science Discovery","volume":"23 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-10-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81173218","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

Building Reconstruction of Historical and Cultural Protection Area Based on Green Technology 基于绿色技术的历史文化保护区建筑改造

Science Discovery Pub Date : 2021-09-23 DOI: 10.11648/J.SD.20210905.12

Zheng Jiaoyan, Chen Hong

引用次数: 0

Experimental Study on Soil Electrical Conductivity Inversion by Ground Spectral Measurement and SAR Data 基于地面光谱和SAR数据反演土壤电导率的试验研究

Science Discovery Pub Date : 2021-08-23 DOI: 10.11648/J.SD.20210904.22

Yin Chengshen, Liu Quanming, Wang Chunjuan, Wang Fuqiang

{"title":"Experimental Study on Soil Electrical Conductivity Inversion by Ground Spectral Measurement and SAR Data","authors":"Yin Chengshen, Liu Quanming, Wang Chunjuan, Wang Fuqiang","doi":"10.11648/J.SD.20210904.22","DOIUrl":"https://doi.org/10.11648/J.SD.20210904.22","url":null,"abstract":"In this paper, the ground-measured spectral reflectance was combined with C-band microwave radar quadrupolarized backscattering data, and the characteristic bands were selected using partial least squares and correlation coefficient methods, and a model was developed to evaluate the degree of soil salinization. Using the spectral reflectance and its logarithmic, first-order and second-order derivatives of the four spectral data, correlation analysis was performed and found that the first and second order derivatives of the spectra were better correlated compared to the first two. The correlations of soil EC values in the four bands of 1584-1588 nm, 1802-1806 nm, 2201-2205 nm, and 2344-2348 nm transformed by second-order derivatives were 0.27, 0.34, 0.33, and 0.35, respectively, and there existed two bands of 1802-1806 nm and 2344-2348 nm that both had better soil EC correlation. The bands selected by the partial least squares method are more backward than those selected by the correlation coefficient method, and there are extremely sensitive bands, and the fit of the second-order derivative transformation model is better compared with that of the correlation coefficient method. By combining the second-order derivatives of reflectance, surface roughness and radar backscatter coefficients, the neural network model with the second-order derivatives of reflectance and radar backscatter characteristics was the best prediction model, and its R2 for soil EC was 0.8666.","PeriodicalId":21652,"journal":{"name":"Science Discovery","volume":"54 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-08-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73739540","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 Status of Impact on Concrete Structures 冲击对混凝土结构的影响研究现状

Science Discovery Pub Date : 2021-07-15 DOI: 10.11648/J.SD.20210904.21

Zhang Chaofeng, Guan Zhongguo

{"title":"Research Status of Impact on Concrete Structures","authors":"Zhang Chaofeng, Guan Zhongguo","doi":"10.11648/J.SD.20210904.21","DOIUrl":"https://doi.org/10.11648/J.SD.20210904.21","url":null,"abstract":"Concrete is currently the most widely used material in civil engineering structures. In addition to being subjected to dead loads and live loads during its service, it may also encounter accidental loads such as impacts and collisions. Previous research has shown that the forced characteristics of concrete structures under dynamic loads such as impacts and collisions are very different from those under static loads. In order to summarize the dynamic characteristics of concrete structures and measures to reduce its impact damage, this article firstly introduced the mechanical characteristics of concrete structures under impact loads, including the dynamic force characteristics of concrete structures under high-speed, low-speed impact loads and confining pressure; Then reviews the achievements and development of domestic and foreign scholars on concrete impact research in recent years: the research status of concrete dynamic constitutive structure is summarized from the aspects of the sensitivity of concrete strength strain rate and the dynamic constitutive model; the research status of impact resistance of concrete structure is carried out from the aspects of high-speed, low-speed impact load and measures to reduce its impact damage. Finally the development trend of concrete structure impact is summarized and prospected, which will provide some references for the subsequent research on concrete structure impact.","PeriodicalId":21652,"journal":{"name":"Science Discovery","volume":"38 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-07-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86864426","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