bluuebunny/crossref_metadata_2025_split huggingface dataset:
Development and Application of Integrated Meteorological Observation Online Monitoring in “One Diagram”
Authors: Zhou Qinqiang , Liu Yanzhong , Ao Zhenlang , Li Jianyong 
Published: March 2021

Abstract
The efficient automatic and intelligent real-time monitoring means have not been fully established after the reform of unmanned ground meteorological observation automation, and the monitoring systems of various observation device are isolated from each other, which makes it impossible to efficiently take an overall view for the running and data transmission state of the ground meteorological observation stations. The integrated meteorological observation online monitoring in “one diagram” for nearly 3000 meteorological devices in 15 categories is designed. The status of software or hardware, network faults of the meteorological devices is displayed by the color code in “one diagram” and the alarm of 3D virtual model components is updated simultaneously, and displayed automatically in the “one diagram” according to the fault level. It is interactively associated with a 3D virtual visual monitoring system based on C/S with one diagram B/S page being embedded, the faults tips of automatic positioning in the 3D virtual model are directly associated and displayed from the 3D virtual visual online monitoring system, with one click on the color block of the fault station in “one diagram”. So “macro-level” monitoring from “one diagram” device layout, category, fault number, and alarm status to “micro-level” correlation of virtual model fault details is established, by which what you think is what you see, meeting the demand of on-line monitoring of integrated meteorological observation stations from “one diagram” to “the whole system”.
Relationship between Lung Cancer Mortality and Haze in Yangtze River Delta of China from 1961 to 2005
Authors: Chen Kui , Guo Qinghao , Chen Guangxin 
Published: March 2021

Abstract
Since the reform and opening up in China, the occurrence frequency of hazy phenomena have yearly increased, particularly in the urban agglomeration such as the Yangtze River Delta (YRD), Beijing-Tianjin Area, and the Pearl River Delta Area. The exposure to extremely poor ambient air quality might result in harmful influence on human health, such as respiratory system and cardiovascular diseases and deterioration in lung function. Here, we selected a typical area of the Yangtze River Delta (Nanjing city for case). We statistically analyze 45-year historical surface observations data of haze in Nangjing city, Southeastern China to study the relationship between lung cancer mortality and haze. The results showed that the dramatic increasing trend of annual occurrence of hazy days between 1961 and 2005, and then the relative incidence of lung cancer increased.
Remote Sensing of Spatial-Temporal Distribution of Suspended Sediment Concentrationin East Dongting Lake, China
Authors: Ou Mingwu , Chen Xi , Zhou Junjie , Li Ying 
Published: March 2021

Abstract
Three Landsat 8 OLI scenes acquired from 2016 to 2017 were used to estimate the suspended sediment concentration (SSC) in East Dongting Lake, China. The results show that SSC in East Dongting Lake is generally low, only the SSC of sediment transport channel connecting South Dongting Lake is significantly high, and that in the west of the lake is relatively small. From 2016 to 2017, the average SSC in the eastern channel was33-120 mg/L, the average SSC in the north branch of the west area was15-43 mg/L, and the average SSC in the south branchof the west area was17-46 mg/L. Under the influence of the dilute water of the Yangtze River in flood season, the overall SSC in the lake area is lower than that in non-flood season, and the average SSCis within 40 mg/L. The variation law of SSC in lake area revealed by remote sensing is consistent with the measured data, which verifies the feasibility of this method and provides a new perspective for dynamic tracking and mastering the distribution law and variation trend of suspended sediment in East Dongting Lake.
An Intelligent Site Environment Survey System Platform Based on ‘Internet + Database’
Authors: Zhi Yanli , Xi Weili , Bi Tao , Li Chao 
Published: March 2021

Abstract
Intelligent environment survey system platform integrates Internet, database, geographic information system and other technologies, including PC side web page and mobile side APP. The platform is applied to the site environmental survey and monitoring practice, assisting the site environmental survey and monitoring work, solving the problems of site monitoring and survey data management difficulty, high cost, low efficiency, standardization of work procedures and content, low degree of automation, and improving the site survey work efficiency and quality.
Analysis of Impact Factors for Flood Early Warning, a Case Study in Wangjiaba Basin of Huai River
Authors: Hu Youbing , Xu Shijing , Liang Shuxian , Wang Kai , Chen Hongyu , Kan Guangyuan 
Published: March 2021

Abstract
Wangjiaba station locates in the junction of the middle reach and upstream of the Huai River. Due to its specific location, the hydrological conditions of the Wangjiaba station can be treated as important indicators for flood forecasting and disaster controlling in the Huai River basin. In this study, 62 flood events, with peak flows exceed the warning water level of the Wangjiaba station over the past 60 years, are selected. On the basis of quantitatively analysis of the watershed status variables and flood forecasting input data, three easily available impact factors including rainfall, initial water level, and rainfall distribution were chosen as flood warning indexes in the Wangjiaba station. Analysis results show that rainfall is the most important factor for flood generation. After that, by introducing the initial water level as additional factor, the positive correlation between the peak flow and the impact factors becomes more significant. At last, with the addition of the rainfall distribution as one more factor, the peak flow forecasting accuracy can be further improved.
Analysis on Calculation Methods and Influence Factors of Bankfull Discharge
Authors: Chen Sihan , Liu Ya , Lu Jinyou , Yao Qiming 
Published: March 2021

Abstract
Rivers are constantly changing under the combined influence of nature and human activities. When exploring the evolution law and morphological characteristics of natural rivers, scholars at home and abroad have introduced many characteristic parameters for quantitative analysis, and the bankfull discharge has always been an important index in the study of riverbed evolution. This paper compares the different calculation methods of bankfull discharge and analyzes the influence factors that lead to the fluctuation of bankfull discharge, and draws two conclusions. On the one hand, in the future, when optimizing and improving the method of calculating bankfull discharge, two points can be mainly grasped: reducing subjective error and improving accuracy. On the other hand, there are many factors that affect the flow of the bankfull discharge, so the accuracy and effectiveness of the basic parameters must be paid attention to in the determination.
Hydrochemical Characteristics and Water Quality Evaluation in Chaoyang District, Beijing
Authors: Luo Zhuoran , Liu Jiahong , Zhang Yongxiang , Shao Weiwei , Jia Ruitao 
Published: March 2021

Abstract
In this study, we used groundwater quality data from 17 sampling sites in Chaoyang District of Beijing, which was measured to analysis hydrochemical characteristics and water quality evaluation combined with Shukarev classification, single factor evaluation method, comprehensive evaluation method and fuzzy comprehensive evaluation method in different seasons in 2018. The results showed that there was little difference in chemical composition and groundwater quality in different seasons. The groundwater ions were mainly HCO3-, Ca2+, and Mg2+ in the western region, and the salinity of water was low. Na+ and Cl- appeared in the southwestern and eastern region, and the concentration of Na+ in May was lower than that in September. Although the single index evaluation method was one-sided, it could determine the main pollutants. Although the comprehensive evaluation method could reflect the water quality status, it greatly highlighted the pollution factors and overestimated the degree of water quality exceeding the standard to some extent. The fuzzy comprehensive evaluation method considered the weight of participating factors, which made the evaluation results more objective and reasonable. The four parameters of TH, Fe3+, NH4+-N and As3+ exceeded the standard, but they generally met the drinking water quality standard.
Application Research of Maintenance and Reinforcement Technology for Arch Bridge Foundation
Authors: Deng Jie , Peng Keke 
Published: March 2021

Abstract
In order to study the application of maintenance and reinforcement technology for arch bridge foundation, taking a reinforced concrete half-through arch bridge and a rigid frame arch bridges as examples, the appearance inspection and disease analysis of the bridge piers and pile foundations were carried out. Based on the modified theoretical calculation model, the analysis method of diseases and the maintenance and reinforcement technology were proposed. The method of the pier section enlargement and adding pile is adopted to strengthen the arch bridge foundation. The results show that according to the modified theoretical calculation model, the actual diseases including the distribution area of cracks and degradation degree are in good agreement with the theoretical calculation results. The reinforcement design of section enlargement and adding pile can provide a reference for the reinforcement of similar arch bridges.
Research on the Protection and Inheritance of Traditional Villages from the Perspective of Cultural Genes—Take Wuhan Dayu Bay Historical and Cultural Village as an Example
Authors: Zhang Zhiqi , Xu Hong , Xu Miao 
Published: March 2021

Abstract
Traditional villages, as an important bearer of traditional culture, are the foundation for the survival and reproduction of traditional culture, but with the impact of rapid urbanization and the rapid development of information, the cultural protection and inheritance of traditional villages are facing a huge impact. This paper takes Dayu Bay as the research object, from the point of perspective of cultural genes, systematically sorts out the cultural elements of Dayu Bay, constructs a genealogy of Dayu Bay's cultural genes, classifies and analyzes its material and immaterial cultural genes, analyzes the problems exposed in its protection and inheritance by sorting out the cultural genes, builds a system of traditional village cultural genes protection and inheritance, and explores feasible protection and inheritance paths.
Research on Testing Methods of Temperature Strain and Force Strain under Extreme Temperature Environment
Authors: Tanguy Axel , Li Yang , Tan Mengxi 
Published: March 2021

Abstract
The traditional quartz differential method and the half-bridge connection temperature compensation test method are improved to realize the effective separation of the physical deformation of the material caused by the temperature effect and the deformation caused by the load under the coupling effect of temperature and load, so as to be the thermal expansion coefficient of the material at extreme temperatures And provide the basis for the test and determination of mechanical performance parameters.
Aggregate Weight Prediction Based on Two-dimensional Image Feature Extraction
Authors: Pei Lili , Yu Ting , Yuan Haochen , Li Wei , Li Yuxuan , Hao Xueli 
Published: March 2021

Abstract
The weight of aggregates of different particle sizes is vital for the online monitoring of the gradation of asphalt mixtures. In order to complete the online intelligent detection of asphalt aggregate gradation, an automatic coarse aggregate weight prediction algorithm based on the feature extraction of aggregate two-dimensional images is proposed. First, use OpenCV to extract the two-dimensional morphological features of coarse aggregate and use high precision electronic gram scale to obtain the actual weight of the aggregate. Then analyze the correlation between these characteristics and aggregate weight. Finally, the weight of coarse aggregate particles can be accurately predicted by establishing a BPNN (Back-Propagation Neural Network) model. The results show that the weight prediction accuracy of coarse aggregate can be achieved 89.49%. The manual weighing process is reduced, which greatly improves the efficiency of online intelligent detection.
Study on Nondestructive Testing and Evaluation Technology for Service Performance of Existing Bridge Pile
Authors: Ren Dong , Huang Conghua , Song Xing , Chen Hao , Peng Yuanpeng , Yang Jun , Sun Xiaoli 
Published: March 2021

Abstract
For existing bridge piles where the superstructure has been built, traditional pile test methods are difficult to apply. In this paper, a nondestructive testing and evaluation technology for service performance of existing pile is put forward. Based on a reinforcement case of existing municipal bridge, the nondestructive method (parallel seismic wave method) is applied to detect pile defects and bearing capacities. In the field test, two excitation types are compared to acquire better stress wave signal quality. The result shows that the length and structural defects of piles can be detected by the parallel seismic wave method. The vertical excitation at bridge superstructure is more conducive to strengthen the first arrival wave characteristics. And the bearing capacity of existing piles can be further estimated based on the soil stratum conditions revealed by the test boreholes and the given survey parameters.
Research on the Design of Community Activity Center in Urban Historic Conservation Areas: Take Tan Hualin as an Example
Authors: Liu Yujun , Xu Hong 
Published: March 2021

Abstract
With the rapid development and expansion of the city and the gradual aging of the population, there are many problems in the management of the urban historic conservation areas, and their protection and renewal are beginning to attract the public’s attention. This paper takes Tan Hualin urban historic conservation areas in Wuhan as an example, through the preliminary investigation and data collection of Tan Hualin, based on its architectural and cultural characteristics, historical context and residents’ needs, to build a community activity center in the urban historic conservation areas.
A Vector Ionospheric Delay Correction Method for GNSS Positioning and Navigation Wide Area Augmentation Service
Authors: Li Qi , Li Zhenhai , Zhang Jing , Cao Xiaochun , Ma Yinhu , Wan Qingtao 
Published: March 2021

Abstract
A new ionospheric delay correction method is proposed to improve the ionospheric correction accuracy of single frequency GNSS users. In the new method, the ionospheric grid point information is expanded from a single scalar vertical correction parameter to a vector of triple elements (the triple): vertical correction parameter, north correction parameter and east correction parameter. The new parameters are used to describe the variation of ionospheric delay correction caused by satellite azimuth. Using the observation data of the ground monitoring stations to fit the triple, and then broadcast the triple to the user. GNSS single frequency users can use the triple data to correct their own ionospheric delay. The testing results show that the correction error of the method is around 0.3 m lower than that of the scalar method.
New functional materials for creating infrastructure facilities in the Arctic and Far North regions
Authors: Lesovik Valery , Puchka Oleg , Bessmertny Vasiliy , Kozlenko Bogdan 
Published: March 2021

Abstract
The article presents aspects of the production of new functional building materials based on foam glass, reproducing the geological processes of formation of natural minerals and rocks. The creation of heat-insulating and structural glass composites (TCS) with increased strength requires the development of a new theoretical base that allows one to design various composites with an amorphous-crystal structure, which forms the specified properties. Two methods of amorphous matrix reinforcement are considered: physical and chemical (or thermochemical). Regularities of formation of porous glass composites are established. The values of technological parameters that are necessary for obtaining glass composites with the specified properties are determined. It is shown that the developed materials can be used for the construction of unique structures with reduced heat transfer. The resulting materials can be used to produce light prefabricated segments, which is important for transportation and installation in the Northern regions.
Granulated activated carbon production based on petroleum coke
Authors: Strelkov Vasiliy , Shirkunov Anton , Ryabov Valeriy , Chuchalina Anna 
Published: March 2021

Abstract
The current tendency of the world oil refining towards a decrease in the fuel oil production and raise petroleum refinery efficiency is expressed in a significant increase of the delayed coking units capacity. This approach leads to an increase in the production of low-quality sulphurous petroleum coke, which is difficult to use for the production of electrodes, which makes it necessary to search for new ways of using this product. Present study considers the production possibility of granulated activated carbon based on anode-grade petroleum coke and petroleum coke with an increased content of volatiles. The experimental part of the work included the study of the effect of petroleum coke carbonization and water vapor activation conditions on the properties of the obtained activated carbon, such as BET surface area, t-plot external area and micropore volume. It is shown that the optimal thermal treatment parameters of petroleum coke for granulated activated carbon production is carbonization at a temperature of 7000C, followed by subsequent activation in water vapor atmosphere at a temperature of 8000C. This approach makes possible to obtain sorbents with a BET surface area reaching 400 m2/g with an activated carbon yield of up to 30 wt.% of the feedstock. Results obtained in the study will expand the possibilities of qualified use of oil refinery delayed coker unit products.
Server Infrastructure Virtualization for Data Centers
Authors: Mochalov Valeriy , Linets Gennadiy , Palkanov Ilya 
Published: March 2021

Abstract
This paper considers cluster systems of data centers containing a definite set of application servers, file servers, data storage systems, and an input-output system that are interconnected by a switching system and communication channels. The goal of research is to increase the efficiency of virtualized cluster systems using a new rational method to distribute virtual machines among the physical elements of data centers. This method is based on an iterative greedy algorithm and a limited enumeration procedure, which improve the performance of a virtualized system due to rational data management. A simulation model for the operation of a virtualized system is developed, and its experimental study is carried out. The approaches presented below determine the required number of cluster nodes in a virtualized system under an unpredictable load rate and an unpredictable level of resources requested by virtual machines.
Improving the reliability and safety of cargo delivery for the Arctic through the creation of transport and logistics centers for multimodal transportation management
Authors: Filippova Nadezhda , Bogumil Veniamin , Vlasov Vladimir 
Published: March 2021

Abstract
For the development of the Northern regions of the Russian Federation, new opportunities are created for the application of logistics methods in all areas of activity: transport management, warehouse management, stocks, etc. Taking into account the development of the situation in the economy of the Northern regions of the Russian Federation and the strengthening of market relations, as well as world experience, it is safe to say that the search for optimal transport schemes for the transportation of goods to consumers and the distribution of freight flows in the regions will be dealt with at the first stage by freight forwarding services, and then these functions will be concentrated in special terminal and logistics centers (TLC).
Biodegradation of acetyl cellulose etrols
Authors: Shkuro A E , Glukhikh V V , Krivonogov P S , Kudryavtsev A D 
Published: March 2021

AbstractThis work aimed to study the biodegradation dynamics of plasticized cellulose acetate samples (etrols) with different content of plasticizers. Isophthalic acid dimethyl ester and orthophosphoric acid tributyl ester were used as plasticizers. The targets of the study also included assessing the effect of the plasticizers’ content on the degradation rate. The biodegradability of plasticized cellulose acetate samples was assessed by measuring the weight loss after exposure to active soil. For the experiment, an active soil of the following composition was prepared: garden soil - 89 vol. %, distilled water - 10 vol. %, microbiological preparation “Tamir” - 1 vol. %. All etrols samples showed a tendency to decomposition in active soil. The rate of sample degradation varied significantly. The highest degradation rate in active soil was shown by a sample containing 16 wt. % tributyl phosphate and 22 wt. % dimethyl isophthalate, as good as ertols sample containing 8 wt. % tributyl phosphate and 14 wt. % dimethyl isophthalate. The expected decomposition time of these samples in the active soil for 90% is 599 and 732 days, respectively. Changing of dimethyl isophthalate content did not affect the degradation rate. Withal the content of tributyl phosphate in the etrols induced a significant effect on the samples’ weight loss. The consequence of the plasticizers’ content on the weight loss rate for 145 days of exposure in the active soil is described by the equation y=-4.76+1.25·Z1+1.49·Z2-0.04·Z12-0.086·Z22+0.000141 where Z1 is the content of dimethyl isophthalate, Z2is the content of tributyl phosphate.
The impact of the Covid-19 crisis on the economies of the Russian Arctic regions
Authors: Skufina Tatiana , Baranov Sergey 
Published: March 2021

Abstract
The article examines the influence of the crisis caused by the Covid-19 on the economies of the Russian Arctic regions. In it, the authors demonstrate that even within one country, different economic conditions of the territories give rise to different forces and different characteristics of the manifestation of crisis phenomena, identifying the specifics of their manifestations in the regions of the Russian Arctic in comparison with the overall Russian situation, based on the analysis of statistical indicators. The approach of a comparative assessment of the impact of the crisis on the regions of the Russian Arctic used in the article gives visual and easily interpreted results. This analysis of the dynamics of indicators that characterize the situation in the labor market, in industrial production and retail trade in Russia as a whole and in the regions of the Russian Arctic indicated that the economy of the regions of the Russian Arctic demonstrates a specific reaction to the crisis caused by the Covid-19.