bluuebunny/crossref_metadata_2025_split huggingface dataset:
A method of calculating the spatial difference of human settlements in urban blocks based on floor area ratio
Authors: Jin Jianglei , Yan Haowen , Bie Qiang , Wang Guigang , Su Gazangjia 
Published: August 2021

Abstract
Based on the method of the Jenks natural break point, this paper constructs the floor area ratio level of urban habitat environmental quality, and proposes a method of analyzing spatial difference characteristics of the human living environment in urban neighborhoods using the Theil-index model and spatial difference measurement index. The proposed method can be used not only to characterize the spatial difference measurement value of urban neighborhoods, but also to calculate the inner spatial difference in city blocks. The effectiveness of the method is verified by the remote sensing image of the case point and the actual data.
Mechanical Mechanism Analysis of the Diseases of the Circular Rubber Bearing of the Bridge
Authors: Fan Sun , Xiaoguang Wu , Miaomiao Fang , Chi Wei , Jiaxin Liu 
Published: August 2021

Abstract
Rubber is a super-elastic material. Super-elasticity can be used to analyze rubber-like materials. This material can withstand large strains and large displacements, but has minimal volume change (incompressible), and has two characteristics: material nonlinearity and geometric nonlinearity. In the research process, the positive pressure, shear force and void of the circular rubber bearing were analyzed. For the circular bearing, it can be found through research that the tensile stress of the rubber layer of the rubber bearing increases rapidly with the increase of the vacant area of the bearing, and the slope of the curve is also increasing. The maximum stress of the rubber layer generally appears between the upper first layer of steel plate and the second layer of steel plate. When the void area reaches 30%, the tensile stress of the rubber layer between the first layer of steel plate and the second layer of steel plate reaches 32.8MPa, which is greater than the specified 17MPa, which causes the cracking and deterioration of the inner rubber layer of the bearing, and finally leads to the rubber support. Because of the collapse of the seat, the vacancy of the seat must be paid attention to in the design and construction process.
A study of urban stormwater runoff and water quality control based on system coupling simulations
Authors: Wu Wei , Ren Lei , Zhu Laifu 
Published: August 2021

Abstract
This study constructed a coupling model of an urban drainage (rainwater) flooding prevention system. Multifactor measures such as the internal source control, drainage pipe network, flooding prevention, and drainage of the system are coupled, the entire process from rainfall to urban rainwater drainage is simulated, and the control and improvement effects of low-impact development (LID) measures on urban stormwater runoff and water quality under different rainfall conditions are discussed. The results showed the following: (1) The constructed coupling model of the urban drainage (rainwater) flooding prevention system has good applicability and can accurately simulate the process and characteristics of urban stormwater runoff and water quality. (2) After LID measures are added, the runoff process is delayed, and the duration of runoff increases. The peak outlet flow of the study area under rainfall with a return period of 2, 3, 10, and 20 years decreases by 66.5%, 57.2%, 51.0%, and 48.2%, respectively. The peak pollutant concentrations decrease, the peaks are delayed, and the minimum removal rate of pollutants under rainfall with a return period of 1, 3, and 5 years is 51.1%, 49.7%, and 37.6%, respectively. (3) The LID measures play a role in improving the runoff flooding in the study area.
Discussion on the implementation of national water-saving actions in Changxing
Authors: Hao Qian , Ling Pengchang , Jiang Zhuming , Peng Zhangzu 
Published: August 2021

Abstract
Against the background of deepening Implementing the National Water-saving Action, Changxing adapts to local conditions by strengthening the dual control system of total water resources and consumption intensity. Changxing creating three major water-saving local characteristics such as building contract water-saving management system; promoting efficient and water-saving agriculture; promoting reuse of sewage water. Through these efforts, an upgraded version of water-saving in the new era will be built, comprehensively improve the level of water-saving in the whole society, also promote high-quality and green development of the economy and society.
Investigation and analysis of Super Typhoon Lekima storm flood in Yuhuan
Authors: Wen-jia Tang , Ze-qi Xu 
Published: August 2021

Abstract
Typhoon disasters occur frequently in coastal areas of China, and heavy rainfall induced by typhoon often leads to flash floods, landslides, debris flow and other disasters in some areas. Based on the investigation of the disaster situation of Yuhuan city during Super Typhoon Lekima, through a large number of investigations, the causes of major disasters in Yuhuan city caused by Super Typhoon Lekima are found, and the shortcomings of flood control and drainage system in Yuhuan city are analyzed Some suggestions are put forward to supplement the weak points and strengthen the supervision, which can also be used as a reference for disaster prevention and mitigation in other coastal areas with frequent typhoons.
Effects of Landscape Patterns on Runoff and Sediment in Danjiang River Basin
Authors: Guo Yiwei , Ding Wenfeng , Xu Wentao , Shao Yiwen , Meng Xi 
Published: August 2021

Abstract
The Danjiang River being the main tributary of the Hanjiang river, is the main water source of the south-to-north water diversion project in China, which is benefit from the protection of ecological environment. As the main reasons for ecological degradation, the land use changing and severe soil erosion attacted considerable attention in recent years. Based on the land use data and measured runoff and sediment data, the landscape pattern index analysis method and statistical analysis method were employed to explore the relationship between landscape pattern indexes and runoff and sediment in Danjiang River Basin (DRB). The results show that the runoff and sediment of the river present a downward trend from 1985 to 2018. The forestland was the dominant type of land use, and the growth rate of grassland was the highest. Results also show that the patch density (PD), the interspersion and juxtaposition (IJI), the edge density (ED), CONTAG, DIVISION and the largest patches index (LPI) have the same trend, indicating that the fragmentation degree of landscape, the connectivity between landscapes, and the richness of landscape increased. In addition, the shannon’s diversity index (SHDI) and IJI were positively associated with the runoff at landscape level, number of patches (NP), PD, ED, and CONTAG were negatively associated with sediment, and CONTAG was positively correlated with sediment. At class level, the NP, PD, LSI, and IJI of forestland, the NP, PD, and DIVISION of cropland, the LPI of grassland, and the NP, PD, and LSI of construction land were negatively correlation with runoff. The LSI and ED of grassland and the LPI of construction land were positively correlation with runoff. And the LSI, IJI, and ED of forestland and the LSI, IJI, and ED were negatively correlation with sediment.
Study on effect of different reservoir water diversion modes on river water quality improvement
Authors: Dong F , Huang A , Peng W , Liu X 
Published: August 2021

Abstract
Urban river water pollution is a serious environmental issue and tends to become worse. One of the key measures to improve urban river water quality is to divert water from upstream reservoir to downstream river course to flush pollutant. In this paper, a one-dimensional hydrodynamic and water quality model of Hun River network was developed based on HEC-RAS model. Different reservoir water diversion modes for sewage discharge were simulated and their effect on the water quality improvement of downstream river course was analysed. The results show that under different diversion flow rates, the larger the diversion flow rate, the better the effect on water quality improvement, and that when total water diversion volume is fixed, the effect of long-term diversion with a low flow rate is better than that of short-term diversion with a high flow rate on downstream water quality improvement. The research results can provide scientific support for optimization of the operation of water diversion from reservoir for sewage discharge.
Analysis of Economic Benefits of Reclaimed Water Industry Utilization: A Case Study in Tongxiong
Authors: Chen Yan , Gao Shang , Zhenhua Peng 
Published: August 2021

Abstract
Taking the Tongxiang Urban Sewage Treatment Plant Integration Project (Phase 1) as an example, this paper designs three reclaimed water allocation solutions after investigating the water cost, water quality requirement and reclaimed water using willingness of potential reclaimed water users in the surrounding area. The economic cost-benefit calculations for all three options show that under the circumstance that the existing water policy and charging standards remain unchanged, the large-scale use of reclaimed water in industrial production will increase the water intaking cost of industrial water users by 50%∼70%. In order to enhance the enthusiasm of water users for the use of reclaimed water, it is recommended that the government and enterprises could allocate the cost of using reclaimed water reasonably, and the government could provide economic subsidies and preferential policies.
Green preparation and application of carbon quantum dots
Authors: Kaiming Kang , Baoyou Liu , Ju Han , Hongwei Ren , Limin Wang , Gang Yue 
Published: August 2021

Abstract
Carbon quantum dots (CQDs) are a new type of carbon-based zero-dimensional materials. Carbon quantum dots have many advantages such as excellent optical properties, good water solubility, low toxicity, environmental friendliness, wide source of raw materials, low cost, and good biocompatibility. Since the first discovery of carbon quantum dots, a variety of synthetic methods have been developed. This article lists the preparation methods and applications of carbon quantum dots, and discovers a new method for ionic liquids as modifiers, which will play an important role in the future research of carbon quantum dots.
Water Level Fluctuation Patterns in Restricted Intermediate Navigable Channels with Different Lock Emptying Processes
Authors: Dian-Guang MA , Lei Wang , Jun-yi Yang 
Published: August 2021

Abstract
The fluctuation of water level caused by the unsteady flow of lock discharge, where the key problem is the relationships between the hydraulic factors in the restricted middle navigable channel and the transformation of unsteady flow and the corresponding scales are investigated. Based on the restricted middle navigable channel of the Baise navigation project, the relationship between the unsteady flow discharge process of lock and the water surface fluctuation process in the restricted middle channel is studied through systematic experiments, and the conclusion is drawn as follows. The main reason caused the flow fluctuation is attributed to the insufficient energy dissipation and rapid increase of discharge during the lock discharge process. And the sectional discharge method which reduces the peak value of the discharge process can reduce the fluctuation of upstream and downstream water level effectively. By reducing the peak value of the time-discharge curve, the energy dissipation along with restricted middle navigable channel increases, with the fluctuation amplitude of upstream and downstream flow reduces, and the attenuation rate of the energy dissipation increases. Furthermore, a fixed phase lag is formed between the reflection wave formed by the downstream ship lift gate and the discharge wave formed by the upstream ship lock discharge, which has little relationship with the discharge curve.
An Empirical Analysis of China’s Energy Security Based on TOPSIS Model
Authors: Yan Shigang , Li Lexuan 
Published: August 2021

Abstract
Within the last twenty years, China has become a net importer of coal, oil and natural gas. China’s energy security becomes increasingly important. The paper analysed the energy production and consumption of China, and described the change of China’s energy security strategy. This research constructed an evaluation system from five dimensions of reserve security, production and transmission security, trade security, consumption security and sustainability. By adopting the grey related TOPSIS model, the research examined the energy security level of China from 2005 and 2019. The paper proposed countermeasures and suggestions to improve energy security level of China.
Application of Data Visualization in Data Analysis of Inclinometer Hole
Authors: Jie Yang , Xiaoyan Xu , Pengli Zhang , Jiaming Wang 
Published: August 2021

Abstract
The deformation measurement data of the bank slope survey hole is one of the typical physical quantities characterizing the safety state of the bank slope. The measurement results of the inclinometer hole are two-way horizontal displacements perpendicular to each other at different depths, and the traditional two-dimensional analysis diagram can’t show the vectorization of the horizontal displacement of the inclinometer hole well, neither highlighting the change of displacement with time nor showing the direction of displacement. In this paper, the measuring principle of inclinometer hole is introduced firstly, and then the monitoring data of several inclinometer holes on the back bank slope of an arch dam is taken as an example to visualize, and the advantages and disadvantages of traditional two-dimensional analysis chart, three-dimensional process analysis chart and spatial displacement analysis chart in visualizing the measuring results of inclinometer hole are compared and analysed. It has certain reference significance for the analysis of the monitoring results of inclinometer holes.
Common problem thinking and technical innovation elaboration Based on the status quo of urban sewage treatment in China
Authors: Liu Zuojun , Qiao Yang , Li Zhexian , Gong Yi , Wang Xiangkai 
Published: August 2021

Abstract
China’s urban sewage treatment developed rapidly, but there are many common problems. In the form of online questionnaire, 1100 people were randomly selected as sample data for description analysis. Based on quantitative research methods on China’s drainage and sewage treatment from 1978 to 2019 and the literature research and information integration of related books and materials, this article discusses the commonalities in urban sewage discharge standards, sewage treatment, and effective sludge treatment and recycling. Descriptive research is carried out on the problem, and due to the current main contradiction in sewage treatment, it is converted to the effective removal of nitrogen and phosphorus organic matter. Then, anaerobic ammonia oxidation is introduced and its scientific and technological prospects are prospected, hoping to provide supportive reference for related research researchers.
Study on Remote Sensing Retrieval of Soil Moisture in Arid Desert Area Based on FTVDI
Authors: Lu Zhao , Wang Daqing , Ding Zhibin , Shi Yue , Ning Hao , Zhao Jiazheng , Zhao Hongfei , Cui Huiru , Xu Haoli , Cheng Zijian , Zhao Xiaoning 
Published: August 2021

Abstract
In this study, the desert oasis area of Minqin, Gansu Province was taken as the study area, and China Gaofen-6(GF-6) satellite and China-Brazil Earth Resource Resources Satellite - 04 (CBERS-04) were invlked as remote sensing data sources. The soil moisture was retrieved by using Forward Temperature Vegetation Dryness Index (FPVDI), and the spatial distribution of soil moisture was analyzed. The result showed that FTVDI could be directly and accurately retrieve soil moisture.
Experimental research on river and lake silts adjusted by a low alkaline silt modifier using as planting soils for greening
Authors: Li Shimi , Chen Wenfeng , Xia Xinxing , Wang Longtao , Chen Feixiang 
Published: August 2021

Abstract

To solve the high pH problem of the filter and the dewatered silt cake during the treatment and disposal of the river and lake silt, a low alkaline silt modifier was employed in this research. To contrast the performance, PAC, PAM and together with the fly ash, conventional silt modifier, and the low alkaline silt modifier were added in the silt sample. The silt was dewatered using a pilot-scale plate and frame filter press. It is found that the filter and the dewatered silt cake with the low alkaline silt modifier were weakly alkaline, TN and TP are also lower than the other groups. The internal mechanism and feasibility of the dewatered silt cake were analyzed and demonstrated by micro-tests (e.g. XRD and SEM). The results indicated the steel slag, phosphogypsum and cement in the low alkaline silt modifier can provide mineral framework, increase the porosity of the silt cake and improve the dewatering performance of silt as the fly ash and the conventional modifier, while the steel slag, phosphogypsum in the low alkaline silt modifier could improve the distribution of phosphorus in the dewatered cake, promote the transformation of bioavailable phosphorus, and improve soil fertility.
Research Status on Dust Removal Technology for High Temperature Gas
Authors: Wang Wenjie , Cui Lin 
Published: August 2021

Abstract
High-temperature dust removal technology has a wide range of industrial application, and is an important research direction for the dust removal. The research status, characteristics and application range of several high-temperature dust removal technologies were summarized in this paper, such as high-temperature cyclone dust removal technology, high-temperature filter dust removal technology and high-temperature electrostatic dust removal technology. It is concluded that improving the fine particles collecting efficiency of cyclone dust collector may be an important research direction.
Typical application scenarios of energy internet platform serving rural revitalization
Authors: Anbang Xie , Peng Li , Yongle Zheng , Huixuan Li , Hongkai Zhang , Wenjing Zu 
Published: August 2021

Abstract
Energy is an important material and dynamic basis to promote the implementation of rural revitalization strategy. With the rapid development of informatization and digitalization, energy internet platform has become a powerful driving force for the construction of a new rural energy system. First of all, this paper analyzes the functional requirements of the rural energy internet platform from four aspects: planning and decision-making, agricultural production, clean heating and market prosperity. Secondly, according to the functional requirements of the platform, a functional framework of rural energy internet platform is established. Finally, four typical application scenarios of planning and decision-making, intelligent agriculture, intelligent heating and platform economy are established. It is of a certain significance for serving rural revitalization through energy methods.
New Principle of Pilot Protection Based on Kendall’s Rank Correlation Coefficient
Authors: Shuai Yang , Xiaopeng Li , Ziyuan Gong , Dongsheng Li , Xiaolei Cheng , Wenbin Cai 
Published: August 2021

Abstract
Affected by the control strategy after MMC failure, the fault current on the converter side of the AC line interconnected with the MMC is significantly different from the fault characteristics of the traditional power supply in amplitude and phase. The new fault current characteristics lead to the inapplicability of the traditional longitudinal current phase differential protection. In order to solve the problem of the applicability of relay protection, a new principle of longitudinal protection based on Kendall’s rank correlation coefficient is proposed. After the AC line fails, the Kendall grade correlation coefficient of the calculated current on both sides is calculated to distinguish the internal and external faults. Simulations are carried out on the RTDS platform, and the results show that the proposed protection principle can reliably distinguish between internal and external faults and has the ability to withstand transition resistance under various control reference values.
Analysis of Designing Green Architecture Based on Building Information Modeling (BIM) Technology
Authors: Long Rui , Li Yanling 
Published: August 2021

Abstract
Architecture industry is one of the most important energy consumers and environmental polluters. Ensuring the ecological stability and the environmental sustainability for humankind, developing green architecture is an urgent need. How to design green architecture properly is the key to constructing energy-saving and sustainable architecture. This paper analyzed the designing procedures of green architecture and the problems in the designing process, and explained how to use Building Information Modeling (BIM) technology to deal with the problems, providing references for designing green architecture.
Combination forecasting model of equipment and material prices for power grid production technological transformation projects based on unary linear regression and grey theory
Authors: Lin He , Gaosheng Rong , Ning Ma , Li Chen , Bo Huang , Xiaofan Guo 
Published: August 2021

Abstract
The purchase cost of equipment and materials occupies a large proportion in the cost of power grid production technological transformation projects, and has a greater impact on project cost control. Therefore, strengthening the management of equipment and material price forecasts and improving the scientificity and accuracy of forecasting methods are important for improving production technology. It is of great significance to improve the cost management of the whole process of the project and improve the lean management level of the investment of power grid enterprises. In this paper, combined with the current situation of equipment and material price forecasting for the production technological transformation projects of power grid enterprises, a combination forecasting model based on unary linear regression and gray theory is constructed, and the validity of the model is verified through empirical analysis.
Power Supply Safety Management of High-risk Customers of Regional Grid
Authors: Defeng Yang 
Published: August 2021

Abstract
Flourishing of domestic electric power industry contributes to the development of various industries and fields, particularly the promotion and popularization of intelligent distribution network, meeting people’s working and living power demand. However, the continuous improvement of the scale and quantity of electric power projects increases the overall difficulty of power supply and distribution management. To be specific, not only modern control technology needs to be applied and advanced power supply & consumption equipment needs to be used, but also scientific and rational power supply & distribution scheme needs to be formulated to ensure the operation reliability of distribution network. In view of this, the paper studies the safety management of power enterprises. First of all, it sets out the defining scope of high-risk customers with the high-risk customers of regional grid acting as the study object, and then, it points out the power supply & distribution safety management problem of high-risk customers, finally, it proposes safe power supply management measures and optimization suggestions from technology, equipment, personnel and management, hoping to provide the practitioners concerned with reference.