bluuebunny/crossref_metadata_2025_split huggingface dataset:
Matching relationship between land salinity and utilization based on the synergy of OLI and ground measurements
Authors: Xu Zexin , Gao Mingxiu , Wang Jiafan , Xie Xiaoxin , Li Ruiyan 
Published: June 2021

Abstract
Timely and accurate grasp of land salinization status and its matching relationship with land use is the basis for scientific improvement of saline land and rational land use. The current land use types of Shouguang City on the south coast of the Bohai Sea were obtained based on Landsat 8 OLI multispectral images using supervised classification. And the spatial distribution map of land salinization was obtained by IDW interpolation. By superimposed analysis of the current land use types and the spatial distribution of salinization, the information of salinization degree was obtained. The matching relationship between salinization and land use was analyzed from both quantitative and spatial aspects. The results show that OLI multispectral image and filed survey can improve the extraction accuracy of land types and salinization degree information. The distribution of salinized land in Shouguang City has prominent regional characteristics, with non-saline, mild, moderate, severe, and saline soil distributed in a pattern of “large concentration and small insertion” from south to north. The spatial consistency of land use and salinization in Shouguang is remarkable, forming spatial characteristics of “vegetable in the south, grain and cotton in the middle, and fishery and salt in the north”. However, no matter from space or quantity, the land use and salinization in Shouguang City have the problem of “overall match, local mismatch”. It is suggested to take differentiated measures to regulate land use according to the current situation of distribution characteristics of land salinization and utilization.
The measurement method of spatiotemporal accessibility of electric vehicle charging stations in the dynamic time-dependent urban environment
Authors: Zhou Xinxin , Han Peipei , Huang Jing , Yu Zhaoyuan 
Published: June 2021

AbstractThe accessibility of electric vehicle charging stations (EVCS) is one of the critical factors affecting energy vehicles’ development. It is also the root cause restricting the replacement of fuel vehicles by new energy vehicles. All kinds of dynamic factors in the city, such as population and traffic, will directly affect the spatiotemporal accessibility of charging service facilities. Therefore, exploring the measurement method of EVCS spatiotemporal accessibility in dynamic time-dependent environments can reduce idleness, alleviate queuing pressure, and promote new energy vehicles. Taking Nanjing as an example, this paper conducts research based on multiply time slots, mobile phone records, and online route planners. It uses population data dynamic effect measurement methods, traffic congestion coefficients, and 3SFCA based spatiotemporal accessibility models to evaluate the time slot changes of EVCS accessibility. The results show that with the changes of the urban population, occupation, residence, work, and leisure, the accessibility of EVCS presents prominent “polarization” characteristics and dynamic effects. It is recommended to formulate new and adjust the deployment plan of EVCS according to the dynamic changes of the urban population, traffic environment, and accessibility in multiply time slots to reduce idleness and queuing and improve the utilization rate of EVCS.
Simple analysis the Characteristics of Petrography and Principal element zone of Hadamengou Gold Deposit, Inner Mongolia
Authors: Xin Wang , Liang Ming 
Published: June 2021

Abstract
The petrographic study of the piedmont potassic belt indicates that the rocks in the piedmont potassic belt of Hadamengou gold deposit are mainly composed of potassic feldspar, plagioclase and quartz, which are distributed in a scattered form, and the rock fragmentation structure is widely developed. The study of element geochemistry and other aspects shows that the rocks in the piedown potassified zone are mainly composed of potassium feldspar, plagioclase and quartz, followed by a small amount of sericite, epidote and kaolin. The main elements mainly contain high K2O and low Na2O, and the K2O/Na2O ratio is higher than 2, all of which belong to the hyperpotassium series rocks.
Efficient individual tree identification from multiple source point cloud
Authors: Xiao Rui , Xu Bo , Jia Wei , Ge Xuming , Shuai Tao , Chen Hongtie 
Published: June 2021

Abstract
Detection and identification of individual trees are becoming increasingly important for forest related applications. Current, researches mostly concentrate on the segmentation of canopy height models (CHMs), which only produce rough tree delineation and numbers. Considering that different trees have changeable economic value and growing speed, this approach proposed a robust workflow that detects not only the location and shape of single trees but also the basic tree type. First, the multiple source point clouds are combined and classified to build the CHMs, based on the geometric information. Then, the tree tops are extracted based on the mathematical morphology operations. The tree delineation are then grown based on the tree tops and the competition among adjacent tress is considered. Finally, a multi-view projection based classification network was developed to identify the tree type, which meanwhile indicate the connecting trees that are hardly separated in CHMs. Experiments results on various data source demonstrate that the proposed approach can produce significant improvements on the detection results than existing researches.
Application of Terrestrial Laser Scanner in engineering survey
Authors: Hu Chang’an , Peng Dekun , Lv Fei , Sun Haifeng , Zhao Tao , Li Wanze 
Published: June 2021

Abstract
For evaluating the objective measured by the traditional measurement technology that is continuous and periodic single point observation method, it is one-sided and uncertainty. The 3D laser scanning technology called the real scene reproduction technology can provide the support for the 3D design of all kinds of tested objectives in the favorable data. It not only simplifies the construction project cost and improves the work efficiency, but also the results of its data evaluation are more reliable and comprehensive. In the past ten years, the terrestrial laser scanner as a physical representative of the three-dimensional laser scanning technology has been applied in some industries such as electric power, archaeology, factories, cities, Bridges, hotels, ships, criminal investigation to represent its immeasurable value. In this paper, these cases applied in the hotel, sculpture, landscape wall, karst cave are more representative to show a variety of terrestrial laser scanner applications.
Assessing the spatial pattern of wilderness in central Yunnan: a case study from Chuxiong county, Yunnan
Authors: Deng Zhongjian , Li Xiaona , Yang Han , Gan Shu 
Published: June 2021

Abstract
Wilderness plays a key role in mankind’s response to combat climate change and slow down the rapid loss of biodiversity. Wilderness protection is the basis and key to preserving biodiversity, and wilderness identification is the basis for wilderness protection. This paper identified the wilderness areas (WAs) and analyzed the spatial pattern of wilderness level using the data of terrain, vegetation types, land use types, roads, and night lights, and classified the wilderness level into levels 1 to 10, with level 1 indicating the highest level of wilderness and level 10 indicating the lowest. Only patches characterized by wilderness level 1 and a patch area of ≧1.0km2 are identified as wilderness areas in this study. The results showed that (1) the low wilderness (level 8-10), middle wilderness (level 4-7), and high wilderness levels (level 1-3) in the region were in mosaic distribution, which accounted for 52.98%, 14.81%, and 32.21% of the region land area, respectively. Low wilderness areas were mainly distributed in the eastern part of the region, the middle wilderness areas were in the west part of the region, and the high wilderness areas were mainly distributed in the southwest and southeast of the region. (2) The wildness areas accounted for 12.74% of the total land area of the region with presenting scattered distribution. Moreover, wildness area which exceeded 10% of the total wilderness area had 5 towns such as Lucheng, Ziwu, and Xincun, Xishelu, and Dadi, and the range of wilderness covered 7 vegetation types, of which 97.46% of the wilderness areas was in pure forests, with 55.2% of the wilderness distributed in the range of 1800-2200 m. (3) The wilderness areas in the region were almost unprotected. The number and area of wilderness patches that were covered by nature reserves only accounted for 13.24% and 13.19% of patch numbers and areas of the total wilderness. Consequently, this might make it difficult to achieve animal and plant migration and gene exchange between different wildness patches, and it was also difficult to implement effective protection measures.
Hyperspectral Image Classification Method Based on Multi-scale Densenet and Bi-RNN Joint Network
Authors: Liang Lianhui , Li Jun , Zhang Shaoquan 
Published: June 2021

Abstract
With the depth of the Convolutional neural network(CNN) increases, CNN may lead to the problem of gradient disappearance. Simultaneously, single scale convolutional kernel may not reflect the complex spatial structural information in hyperspectral image(HSI). In addition, the CNN based approach regards the spectral band data on a single pixel of the HSI as a disordered high dimensional vector for processing, which does not meet the characteristics of the spectral band data. To tackle these aforementioned issues, a novel classification approach based on multi-scale densely connected convolutional network(Densenet) and bi-direction recurrent neural network(Bi-RNN) with attention framework is introduced in this study. Specifically, multi-scale Densenet is exploited to fully extract the multiple scales complex spatial structural information and utilize the strong complementary yet correlated spatial feature information between convolution layers, and Bi-RNN with attention is designed to obtain inner spectral correlations within a continuous spectrum. For comparison and verifying the effectiveness of our proposed method, we test the proposed method with nine other recently proposed methods on Salinas dataset, and the experimental results demonstrate that the proposed method can sufficiently exploit spectral and spatial information and outperforms other competitive methods.
The research on carrier phase time transfer method based on least curve fitting
Authors: Wang Xiang-Lei , Xu Shi-Yi , Xu Jing-Xuan , Zeng Fei 
Published: June 2021

Abstract
The method of continuous GNSS carrier phase time transfer is studied in detail, and the cause of jump in carrier phase time transfer results is analyzed. The relationship between multi-day data jump and daily jump is deduced in theory, and the correctness of the deduced result is verified by the calculation result of actual measured data. Solution is given to abnormal data jump in carrier phase time transfer. A continuous time transfer method based on least square curve fitting is proposed to deal with abnormal jumps in observation data, this method uses the least square curve fitting algorithm to fit and replace the observed data at abnormal moments to achieve continuous time transfer. The method proposed in this paper are validated and analyzed with the actual measured data, and compared with the traditional GNSS carrier phase time transfer solution. The results show that the methos given in this paper can solve the problem of abnormal data jump to a certain extent, effectively improve the continuity, availability and reliability of time transfer results, and also improve the frequency stability of time transfer results.
Analysis on the change of Yubei District construction land in Chongqing
Authors: Liu Nana , Zhou Yang , Cheng Wenyi 
Published: June 2021

Abstract
With the development of economy, countries all over the world are experiencing urbanization at different speeds. As the largest developing country in the world, China is experiencing long-term and sustained rapid economic growth and large-scale urbanization. Chongqing, China is a municipality directly under the Central Government of the People’s Republic of China. It is also a world-famous mountainous city and a comprehensive industrial city. As the main urban area of Chongqing, the population and land use scale are rapidly expanding, and the urban infrastructure construction is further promoted. This paper analyzes the land use change of Yubei District in recent 20 years, which is of great significance to guide the urban planning scientifically and rationally, control the scale of urban land use, and protect the limited arable land resources and ecological environment..
Statistical analysis of the differences of head and face features between terracotta warriors and modern multi ethnic groups based on 3D information extraction
Authors: Hu Yungang , Wang Jingyang , Lan Dexing 
Published: June 2021

Abstract
The terracotta warriors excavated from Qin Shihuang’s mausoleum are precious materials of the Qin Dynasty. They have great historical, scientific and artistic research value and are considered to be the true portrayal of the Qin people. In anthropology, the measurement of head and face features is one of the important means to analyze the ethnic relationship. In this paper, the 3D laser scanner is used to collect the high-precision 3D point cloud data of the terracotta warriors, extract the head and face features of the terracotta warriors, and variance analyze (ANOVA) and cluster analysis with the collected head and face features of 29 modern ethnic groups. Variance analysis shows that there is no significant difference between the terracotta warriors and modern people in the shape of morphological facial length, bizygomatic breadth, nose height, the height of mucons lips, and mouth breadth. Cluster analysis based on head and face features shows that the terracotta warriors belong to the same group with 10 ethnic groups including Mongolian, and they have more similar head and face features.
The Impact of Climate Change on the Energy Consumption of Passive Residential Buildings in the Yangtze River Delta
Authors: Huang Wenjuan , Wang Bojun , Yang Yanping , Dong Shuzhao 
Published: June 2021

Abstract
With the global warming in the future, the meteorological data based on the Typical Meteorological Year (TMY) can no longer accurately reflect the changes in building energy consumption under future meteorological conditions. This paper selects the typical meteorological year (TMY) in the Yangtze River Delta region as the base year data and the monthly scale forecast data provided by the IPCC, and uses the “Morphing” method to predict hourly weather data in 2050 and 2080. The use of energy simulation software Energy Plus of the Yangtze River Delta region in a passive multi-storey residential building energy simulation, analysis of building energy performance under future climate change, projected changes passive residential building energy demand over the next 60 years of trend.
Discussion On Prefabricated Assembly Plan Of Subway Underground Station
Authors: Wei Huang , Meng Ren 
Published: June 2021

Abstract
Prefabricated assembly technology has become an important direction for the development of subway underground stations. Comprehensively considering the three factors of stress, waterproof and construction environment, this paper proposes a set of prefabricated and cast-in-place assembly plans for subway stations. On the premise of ensuring that the overall stress form of subway station frame does not change significantly, the detailed prefabricated joint structure is designed, which effectively solves the waterproof problem of underground structure. The combination of permanent column and temporary column is realized, the investment of formwork support is reduced, and the assembly construction process of subway station is greatly simplified.
Study on Estimation Method of New Construction Waste
Authors: Jin Kai , He Chao , Dong Shuzhao 
Published: June 2021

Abstract
With the rapid development of construction industry and the large discharge of construction waste, there are many environmental problems. In order to formulate and implement the strategy of reducing management at the project level, it is necessary to estimate the amount of construction waste production accurately. Based on two methods, the building area method and the BIM method are used to estimate the amount of construction waste generated by a new residence, and a comparative model is established. According to the results, the method based on BIM can accurately estimate the amount of residential construction waste, improve the management level of residential construction waste and reduce environmental pollution.
Application of BIM technology in a prefabricated complex project
Authors: Liu Zhen 
Published: June 2021

Abstract
With the development of China’s economy, the status of the pillar industry of the construction industry has been highlighted. However, compared with developed countries and regions, the construction industry in China generally has many problems such as large energy consumption, weak management, low level, low profit, and dense personnel. The prefabricated building has entered the public’s vision. The prefabricated building has the advantages of energy saving and emission reduction, reducing environmental pollution and high work efficiency. Therefore, the prefabricated building has become an essential construction method for the development of the construction industry. Although the assembly type has many advantages, but the complicated information, complex technology, design refinement and other problems restrict the assembly type technology level in China. Therefore, it is necessary to combine BIM technology to carry out prefabricated component deepening design, daylighting and energy saving analysis, three-dimensional visualization analysis, construction scheme simulation, site layout process analysis, quality process monitoring, etc., to find complex problems in design and construction and conduct visualization research. This paper takes a complex project as an example to carry out the whole process of BIM application in prefabricated building design and construction, which makes the building realize the integrated innovative design of structural system, electromechanical system and prefabricated construction. The maximal adaptability to the space of the complex building is created, resulting in a high quality construction that adds significant value.
Research on the Restoration Techniques and Prevention Strategies of Historic Buildings in Macao
Authors: Zheng Liang , Chen Yile 
Published: June 2021

Abstract
For the protection of historical buildings, in addition to the policy and legal provisions for the protection of historical buildings, it is also necessary to consider the traditional architectural form, craftsmanship, materials and other factors for specific historical buildings, and adopt appropriate restoration techniques. The text analyzes the common causes of damage to historical buildings in Macau, provides corresponding repair techniques to deal with the causes of damage, provides references and functions for the restoration of historical buildings, and avoids secondary damage caused by improper repair.
Bandwidth Selection of Normal Information Spread Estimation Method for Geotechnical Parameter Probability Distribution
Authors: Kong Lingqi 
Published: June 2021

Abstract
Normal information spread estimation method (NISEM) is an effective method to infer the geotechnical parameter probability density function. However, it is found that the optimal bandwidth calculated by the existing method is not consistent with the actual situation in engineering application. In order to determine the matching bandwidth of NISEM, the histogram grouping number and group distance according to the sample quantity and range are first determined in this paper. Then the bandwidth h of NISEM is calculated, taking h as the benchmark, 0.1h as the step to change bandwidth. And combining with judgment coefficient, the optimal matching bandwidth of NISEM is finally obtained. The validity and rationality of the proposed method are verified by geotechnical test data of two groups of large samples and four groups of small samples in practical engineering. The results show that: under the condition of limited geotechnical samples, the best matching bandwidth is related to the number of histogram groups, which is relative. And the bandwidth of each group of test samples is different. The research work in this paper perfects the application of NISEM in inferring geotechnical parameter probability density function.
Structural Design and Analysis of Zhaogangwang Steel E-commerce Technology Center
Authors: Zhao Ran , Wang Kai Wei 
Published: June 2021

Abstract
This project is a complex over-limit multi-storey structure. The structural over-limit items were analyzed, key parts were adopted to improve the seismic grade, the frame column was made of reinforced concrete column, and the thickness of the floor slab and the reinforcement were designed. The conversion truss was located on the 4th floor, with a span of 25.2m, and adopted H-shaped steel member steel truss. The performance-based design of the structure only meets the requirements of the supporting column conversion truss and related vertical members, and meets the non-yielding of large earthquakes.
Comparative study on the roofs of traditional revival architecture in modern China
Authors: Zhu Yanqing , Luo Wei 
Published: June 2021

Abstract
In this paper, the traditional revival architecture works of four prominent Chinese and Western architects in China are considered for the purpose of analyzing the external form of the roof curves in conjunction with the internal function of the roof truss. The differences between Western roof truss structure and Chinese traditional one in forming the characteristic roof curves of each cases are clearly brought out. The investigation reveals the adaptive and mutual influence of the Western structural systems and Chinese architectural elements on each other, and reflects on the significant contributions of Chinese and Western architects in the modernization and transformation process of traditional revival architecture.
Application of BIM Technology in the Construction Phase of Steel Structure Engineering
Authors: Zhan Zhenguang 
Published: June 2021

Abstract
At present, the continuous development of the construction industry is inseparable from the support of BIM technology. In the construction industry, the construction of steel structures is particularly prominent. With the rapid development of steel structure engineering and the continuous advancement of technology, the technology of BIM has been produced. It is the integration of the two that led to the BIM technology. Only in this way can it play the key to ensuring quality in the construction of steel structures, so it can be said to be an indispensable technology. Therefore, the application of BIM technology in the current steel structure engineering construction can be very beneficial to improve work efficiency, quality assurance and project inventory budget. For this reason, this article analyzes and recommends the application of BIM technology in steel structures.