bluuebunny/crossref_metadata_2025_split huggingface dataset:
Environmental Engineering: Regional Aspects (on the Example of the Krasnoyarsk Territory)
Authors: Kurbatova S M , Aisner L Yu , Volkova A G 
Published: April 2021

Abstract
Environmental pollution has reached dangerous levels in many countries, including Russia. Given the fact that the main source of such anthropogenic impact on nature is production, the question of the impact on the economic sector naturally arises in order to influence the stabilization of the situation with the state of modern ecology. Environmental engineering is such a complex tool. At the same time, several levels of it should be distinguished: national, acting on the whole state and establishing the main, fundamental propositions addressed to all its subjects; regional, taking into account the economic and climatic and natural specifics of a particular region; local, at the level of a specific enterprise. This article reveals some aspects of the regional engineering on the example of the Krasnoyarsk Territory, given that the ecological problem is the most acute for this region, given that the region takes the first places in the Russian Federation (and its individual settlements – in the world) by the level of contamination.
Measuring Effects of Investment Polycentricity on Economic Development of Municipalities’
Authors: Krasnoselskaya D Kh 
Published: April 2021

Abstract
Polycentric matters are becoming popular under spatial agenda and regional policies across developing and advanced countries. Having put the polycentricity concept into normative plans, key shareholders found out fuzzy results in empirical body of experiences which could be explained by territorial heterogeneity, chosen measures, and techniques. The article aims on testing hypothesis whether a polycentric pattern in terms of investments in fixed assets has a positive effect on economic development in municipalities. The bivariate Moran’s indexes were calculated using data on investments in fixed assets and the volume of shipped own production goods, performed works, and services from 2015-2019. Our results showed that investments in fixed assets associated with economic development in different ways due to the presence of assisted regions in examined case study and scattering of investments in fixed assets due to regional disparities. These results might be taken into account while elaboration of new spatial strategies within regions in terms of resource distributions.
Research on Settlement Control of New and Old Highway Roadbed Based on Different Bench Excavation Dimensions
Authors: Gao Yang , Lin Xue , Shi Zhenyue , Wang Qingbiao , Jiang Yanbo , Zhao Xinyue , Wu Kun , Li Xinyuan , Zhang Jie , Zhang Junjie 
Published: April 2021

Abstract
The reconstruction and expansion of expressways is an important means, and how to control the settlement deformation of the subgrade width is an urgent problem to be solved. Step splicing is an effective means to control settlement. Therefore, it is very important to study the size of the steps. Expansion is based on engineering. Through literature research, numerical simulation and other research methods, combined with theoretical knowledge of soil mechanics, the settlement control of widened roadbed in highway reconstruction and expansion is studied, and the following conclusions are obtained: (1) Three different types are studied. The deformation law of subgrade and foundation top surface of step size; (2) A combined subgrade step excavation method is proposed, which provides a reference for similar projects. (3) The method of excavation and splicing of combined subgrade steps was verified, and the correctness of combined subgrade excavation and splicing was verified.
Numerical analysis of stress distribution and deformation and failure characteristics of surrounding rock in coal road excavation
Authors: Yang Liping 
Published: April 2021

Abstract
In order to further provide a basis for determining the reasonable sealing depth of the coal seam drainage hole, based on the geological data of the W33011 working face of Sihe Mine, the FLAC3D numerical simulation software is used to analyze the stress, displacement, and plastic zone of the surrounding coal body after the excavation of the W33011 roadway in Sihe Mine. And the distribution law of vertical stress, horizontal stress, vertical displacement, horizontal displacement and elastoplastic failure characteristics of the coal body around the roadway are obtained.
Preparation and luminescence properties of Ba2Mg(BO3)2:Eu2+/3+ phosphor
Authors: Yao Huifang , Qiu Zhao , Xiong Xiaobo 
Published: April 2021

Abstract
The preparation conditions of phosphor based on Ba2Mg(BO3)2 host was systematically investigated, the effect of reduction atmosphere on the Ba2Mg(BO3)2:Eu2+/3+ phosphor was investigated in detail as well. Eu2+ and Eu3+ ions coexist in the host lattice on condition of CO reduction atmosphere, which results in multiple luminescence centers, therefore the phosphor could be selectively excited by 365 nm, 395 nm UV. The yellow emission intensity at 564 nm was remarkably enhanced when more Eu3+ ions were reduced to Eu2+ ions in atmosphere of H2, but Eu3+ ions were not totally reduced yet. By means of the control of reduction condition, high brightness yellow phosphor Ba2Mg(BO3)2:Eu2+/3+ was prepared accordingly. Color coordinate of yellow phosphor is very close to white light area, this phosphor could be excited by near ultraviolet (UV) InGaN chip, combing with blue light, and applied in white light-emitting diodes (WLEDs).
Research on Drug Molecular Computing Based on Support Vector Machine and Neural Network
Authors: Xu Ruihan 
Published: April 2021

Abstract
With the continuous development of science, a large number of drugs, molecules and genes have been stored in various databases. The relationship between drug like molecules and molecular properties can be identified by computer science methods according to the diversity of compound library, drug molecular characteristics and the differences between different molecules, so as to achieve the purpose of drug screening. In this paper, 300 FBPase inhibitors were selected from previous literatures to convert lC50 into plC50. The whole data set is divided into 236 molecules of training set and 64 molecules of test set. Two machine learning algorithms, namely Neural Network and Support Vector Machine, are selected to construct the prediction model with the training set as the learning object. And the reliability of the model is verified by the test set, and it is applied to the prediction of FBPase inhibitors. The prediction results show that the model is stable and reliable. In addition, the randomization test shows that the current model is not caused by chance correlation. The explanation of the selected molecular descriptors proves that the polarity of the molecule plays an important role in the inhibitory activity of FBPase. The model can provide some useful guidance for drug researchers and can screen ideal drug molecules before drug development.
Study on fire risk assessment for underwater soft rock tunnels based on AHP
Authors: Chen Jie 
Published: April 2021

Abstract
Based on AHP, fire risk of underwater soft rock tunnel was assessed. This study is aimed to quantify risk factors associated with fire of underwater soft rock tunnel, and calculate various risk factors. Assessment target weight through the consistency check of underwater soft rock tunnel was then obtained, and underwater soft rock tunnel fire risk will be comprehensively evaluated by comparing the weight and combining the scores of each risk factor. Suggestions for its weak parts are proposed.
Experimental study on acoustic condensation fog elimination in traveling wave tube
Authors: Liu Chang , Tian Zhangfu , Zhao Yun , Zhou Hefeng 
Published: April 2021

Abstract
Acoustic condensation artificial fog elimination has the advantages of wide application range, good economy, flexible and controllable operation area, and does not affect traffic operation. The characteristics of the fog, the frequency and intensity of the acting sound waves have an important influence on the effect of condensation and fog elimination. This paper studies the influence of the frequency of fog on the microscopic particle size distribution and the change of light transmission in the process of fog elimination from both theoretical and experimental aspects. The research results show that for natural fog conditions with low concentration, the time of pure sound wave action takes several minutes to tens of minutes. Under the condition of high-concentration artificial fog, the anti-fog time can be shortened to tens of seconds. Simulations and experiments have both confirmed that sound waves can significantly promote fog elimination, and there is an optimal frequency between 200Hz-700Hz.
Research on Physical Damage of Outdoor Physical Exercise Based on Environmental PM2.5 Detection
Authors: Yu Wei 
Published: April 2021

Abstract
The components of PM2.5 are complex and changeable and are easily affected by seasons and climate. Prolonged exposure to high concentrations of PM2.5 can easily induce inflammation in the cardiovascular system, respiratory system, immune system, and genitourinary system. In severe cases, it can cause cell mutations to induce cancer. The paper adopts the literature method, from PM2.5, risk perception, public physical exercise behaviour, outdoor environment exercise behaviour differences, etc., in recent years, my country’s public risk perception under PM2.5 environment Review with outdoor exercise behaviour research. Research results show that inflammatory damage, oxidative stress, and immune response caused by PM2.5 are important molecular biological mechanisms that cause human injury in outdoor sports people. The enhancement of human respiratory rate and changes in breathing methods during outdoor sports can cause PM2.5 to cause greater damage to the respiratory system, cardiovascular system, nervous system and immune system of the population.
Numerical study on the influence of foamed copper on flow boiling characteristics
Authors: Shen Yitao 
Published: April 2021

Abstract
Traditional heat dissipation materials can no longer withstand the overheating phenomenon caused by excessive heat flux, metal foam materials provide new solutions for chip heat dissipation and air conditioning due to the superior structural characteristics. In this paper, the tetradecahedron model of the foamed copper was constructed to simulate the heat transfer characteristics of the filled foamed copper channel in the boiling flow process to explore the influence of the foamed copper structure parameters and filling length on the heat transfer characteristics. By changing the filling length of the foamed copper, the polynomial fitting function is solved to the optimum filling ratio of 0.6, and the gas phase rate and the working fluid outlet temperature are both at the optimum value ; Introducing the heat transfer influence factor i, it is obtained that it increases with the increase of PPI and decreases with the increase of ε.
How to Improve the Stability and Durability of Sand Castles
Authors: Wu Haofan , Shen Zhangqin , Zhang Yichi , Wang Xinbao , Zhu Yili 
Published: April 2021

Abstract
On the beach in midsummer, one of the favorite recreational activities for adults and children is to build the castle of the sea sand. However, the castles carefully built by the artists are often ruined by the inflow of waves or rising tides. We built the best 3D model of the sandcastle foundation. Moreover, we found the optimal essential moisture content. Due to the frequent precipitation in summer, our model also provides some reinforcement schemes. we compared the bearing capacity coefficients of several common foundation shapes and obtained the optimal shape on a plane. Then we compared the various indexes of the round table with different stacking angles in the vertical direction. We constructed the evaluation function using hierarchical analysis and then found the optimal stacking angle at the point where the first derivative of the function was zero. When calculating the thickness of the foundation based on a sandcastle with specific gravity, we chose the ordinary column foundation bearing capacity formula as the bearing capacity formula of the circular table foundation. Furthermore, we use this formula to find the corresponding thickness of the foundation in combination with the optimal stacking angle previously obtained.
Analysis of fuel consumption and emission between C-WTVC and PEMS methods of heavy-duty vehicle
Authors: Li Bo , Guo Yong , Xu Junhui 
Published: April 2021

Abstract
The chassis dynamometer and PEMS test implemented on a heavy-duty vehicle,through comparing the working condition, fuel consumption and emissions result,it showed that the engine working area in PEMS test occupy most of the working area under the engine performance curve from 1300r/min to 2500r/min at the medium load. In the C-WTVC cycle the engine usually worked below 1900r/min at medium and heavy load.Thus in PEMS test the fuel consumption and pollutant emissions are higher than them in C-WTVC test,the fuel consumption is 12.54L/100km which is 9.3% higher, the brake specific emission of NOx,PN,CO are 91.0%,38.7% ,78.9% higher respectively.The PEMS test is more practical and convenient for heavy-duty vehicle emission test while has a poor measurement repeatability under the influence of different road conditions.The C-WTVC test cycle has a good measurement repeatability for its fixed condition.
Evaluation of the Implementation Effect of the River Chief System in Huzhou City
Authors: Chen Wenwen , Lili Li , Ji Dandan 
Published: April 2021

Abstract
Based on the objectives and tasks of the implementation of the river chief system, an evaluation system for the implementation of the river chief system in Hu Zhou city was established, which consists of four parts: water pollution prevention and control, water environment treatment, water resources protection and water function improvement. Based on the relevant data of Huzhou city from 2010 to 2018, the implementation effect of river chief system was analyzed. It is found that the implementation effect of the river chief system in Huzhou city shows a well upward trend, but there are still some fluctuations and deficiencies. In view of the future development of river chief system, relevant suggestions for developing a linkage and cooperation mechanism, strengthening the assessment and accountability mechanism and increasing publicity.
Synthesis of metal oxide photoanode with improved photoelectrochemical performance by hydrothermal method
Authors: Wan Lijuan 
Published: April 2021

Abstract
Hematitephotoanodewas obtained through hydrothermal method. The physical and photophysical properties of the hematitephotoanode were investigated by X-ray diffraction (XRD), UV-vis absorption spectroscopy,and the photoelectrochemical performance was also evaluated. In terms of maximizing the photoelectrochemical performances of the hematitephotoanodes, the preparation conditions were optimized. And a possible mechanism was proposed to explain the reason for the improvement ofphotoelctrochemicalperformances.
Study of the stability of the iron oxide photoelectrodeprepared through hydrothermal method
Authors: Wan Lijuan 
Published: April 2021

Abstract
Iron oxidephotoanodewas obtained through hydrothermal method. The morphology of the hematitephotoanode was investigated by scanning electron microscopy (SEM) and the photo-electrochemical stability performance was also evaluated. The photochemical stability of a photoelectrode is crucial pointfor practical application of a photoelectrochemical cell. The photoelctrochemical stabilityper formances of hematite photoanode can be improved by the synthesis method.
Scaling Inhibitor Impact to Corrosion Resistance of J55 mild Steel in CO2 saturated brine
Authors: Zhang Qingbo , Xu Xiaowei , Hua Xueping , Lei Jianyong , Ma Yun , Yu Qingsong 
Published: April 2021

Abstract
The corrosion behavior of the J55 mild steel alloy in CO2 saturated brine have been studied by weight loss technique, potentiodynamic polarization technique and characterization of the corroded surface techniques. The results demonstrate that the corrosion solution is easy to penetrate into the matrix and activate corrosion without scale inhibitor. When the scale inhibitor content was as high as 30 mg/L, the effect of scaling products on corrosion gradually decreased. Adding the corresponding scale inhibitor in the solution was beneficial to slow down the corrosion rate and the possibility of pitting corrosion. The corrosion product film is mainly FeCO3, and with the increase of scale inhibitor contents, the density of FeCO3 was stronger and compact, which could greatly prevent the contact between the medium and the matrix..
The effect of mineral composition in the compound soil of soft rock and sand on special surface area and cation exchange capacity
Authors: Sun Zenghui , Peng Biao , Hu Ya 
Published: April 2021

Abstract
The X-ray diffraction method and gas adsorption method were used to investigate the mineral composition and special surface area of different soft rocks, sands, and composed soil. The results showed that (1) Montmorillonite, kaolinite, potash feldspar, calcite, quartz, plagioclase and illite, constitute the soft rock. Quartz, potash feldspar, plagioclase, calcite, montmorillonite, illite, and kaolinite constitute the soft rock in the Mu Us sandy land. There are several types of soft rocks, and there are some differences in the mineral composition of different types. The highest primary mineral content is 94.6% and the lowest 41%; the secondary mineral content is the highest 59% and the lowest is 5.4; (2) The special surface area of different types of soft rock is quite different, and the special surface area is up to 17.14 m2g−1, the lowest is 3.12 m2g−1, and the average content is 9.98 m2g−1. The cation exchange capacity is up to 7.25 cmol(+)/kg, and the lowest is 3.36 cmol(+)/kg; (3) The fitting formula of secondary minerals and specific decomposition of arsenic sandstone, aeolian sandy soil and composite soil is y = 2.423e0.0871x, and the correlation coefficient R2 = 0.8258. The fitting formula for the exchange capacity of secondary minerals and cations is y = 3.105e0.0348x, and the correlation coefficient R2 = 0.9235.
Application of Serum Free Medium Cultured Vero Cells for the Production of Recombinant Oncolytic Herpes Simplex Virus 2
Authors: Fang Zongyao , Wang Leilan , Zou Zongxing , Zhang Siqi , Zhao Yin , Hu Sheng , Liu Binlei 
Published: April 2021

Abstract
The oncolytic virus, especially the recombinant oncolytic herpes simplex virus 2 (oHSV2), has attracted much attention because of its promising cancer treatment effect. To eliminate animal-derived substances from serum supplemented culture medium, which is an adverse factor for the safety of biological products, this study selected three typical serum free media (SFM) on the market, and successfully obtained three SFM cultured Vero cell lines which could be expanded stably. This work provided a reference for the application of SFM to the production of other biological products or vaccine.
Design Method and Evaluation Criteria on Gyratory Compaction Based Cold-Mixed and Cold-Laid Recycled Asphalt Mixture
Authors: Hu Chao , An Ping , Dong Zhao , Liu Jiuwei 
Published: April 2021

Abstract
Cold-mixed recycled asphalt mixture is widely used due to the advantages of good eco-friendliness, resource conservation, and convenient construction. In order to further improve the mixing ratio design theory of cold-mixed recycled mixture, this paper has presented the research on design method and evaluation criteria of cold-mixed and cold-laid recycled asphalt mixture based on gyratory compaction. Research has shown that fine aggregate and mineral powder adhere to asphalt and exist in the form of agglomeration in the Reclaim Asphalt Pavement (RAP), which will cause the gradation of the milling plan material to decay after extraction. According to the viscosity characteristics of cold mixed asphalt, it is recommended that the mixing temperature of the mixture should be greater than 25°C, the compaction of cold-mixed recycled mixtures is easier to achieve by using gyratory compaction method. The paper proposes a test method to determine the optimal asphalt content based on initial strength and sweep test, and proposes a test method for controlling the strength of the mixture by the number of compactions and the forming temperature, establishes evaluation system of initial strength and final strength of cold-mixed recycled mixture, and corrects the evaluation method of high temperature stability and water stability of cold-mixed recycled mixture. The results show that the cold-mixed recycled mixture has low initial strength, insufficient high-temperature stability and water stability. With the volatilization of the diluent, the strength, high temperature stability and water stability of the mixture have been significantly improved.
In-situ Electrochemical Synthesis of Core-shell Structural NbC@Nb5Si3/Nb Composites in Molten Salt
Authors: Li Hongmei , Nong Zhisheng , Xu Qian , Song Qiushi , Chen Ying , Man Tiannan , Hao Chenguang 
Published: April 2021

Abstract
Core-shell structural NbC@Nb5Si3/Nb composites were synthesized from Nb2O5, SiO2 and carbon in molten CaCl2-NaCl salt by electrochemical reduction. Carbon combined with the reduced metal niobium to form NbC core with a diameter of 40nm, and Nb5Si3/Nb as the metal shell. A strong bonding between NbC and Nb5Si3/Nb is benefit for the in-situ compound. The addition of NbC phase could improve the room temperature fracture resistance and reserve the high temperature strength of Nb5Si3/Nb. In order to better understand the reaction mechanism of the electro-deoxidation process, partially reduced samples were obtained by interrupting the reduction process after different reaction times, and examined by XRD, SEM with EDS and TEM analyses.
Bridge structure safety assessment
Authors: Li Shuo , Song Yaping , Liu Deqing 
Published: April 2021

Abstract
With the passage of time, more and more highway bridges gradually enter the old age, and the safety assessment of bridge structures is particularly urgent. According to the use status of in-service reinforced concrete bridges and the actual problems of highway bridges, the necessity and urgency of this subject research are pointed out. At the same time, it comprehensively analyzes the technical specifications, research and application status of bridge structure safety assessment at home and abroad, and points out the advantages and disadvantages of existing technical specifications and research results in terms of content, methods and applications, and aims at the existing technical specifications and research results. Insufficiency, the main research content of this topic is proposed.
Finite element analysis of rubber material cross specimen based on ANSYS Workbench
Authors: Zeng Lingqi , Zou Huisong , Peng Dongdong 
Published: April 2021

Abstract
The finite element analysis software ANSYS Workbench was used to fit and analyze the Ogden constitutive model, and the effect of the arm seam and its parameters on the stress distribution uniformity in the central test area was simulated and analyzed. The results show that different chamfering radii and the number of arm seams have an effect on the stress distribution in the center test area of the sample. The chamfering radius of 1.5mm in the center test area has a high uniformity of uniform stress distribution and a small degree of stress concentration. As the number of arm seams increases, the uniform stress distribution in the central test area increases slightly. This study can provide a reference for the preparation of standard specimens for bidirectional tensile testing of rubber materials.