bluuebunny/crossref_metadata_2025_split huggingface dataset:
Analysis on Composite Erosion Process Based on Multi Dynamic Erosion Environment Simulation
Authors: Yang Chunxia , Zhen Bin , Zhang Pan , Xiao Peiqing 
Published: July 2020

Abstract
Using the compound erosion experimental device developed by ourselves, the compound erosion process simulation experiment of 35° steep slope were carried out under different combination modes of freeze-thaw, wind, rainfall. The runoff and sediment yield change process of Pisha sandstone slope under different dynamic combination environment were studied. The results show that the superposition of wind, freeze-thaw and rainfall conditions obviously promotes the occurrence of slope erosion, among which the effect of freeze-thaw increased the collapse phenomenon obviously in the erosion process.
Analysis on the Influences of Temperature on the Moisture Detection of Transformer Bushings
Authors: Gu Zhaoliang , Zhu Wenbing , Zhu Mengzhao , Xu Wei , Gao Zhixin , Yi Feng 
Published: July 2020

Abstract
Insulation damp is the main cause of transformer bushing failures. Dielectric loss detection, as the most important method to evaluate the insulation state of transformer bushing, has been widely used in the evaluation of transformer bushing dampness. But its accuracy of detection will be affected by temperature and other environmental factors. The real capacitor transformer bushings have been taken as the research object to simulate the real situations of transformer bushing dampness in this paper. The relationship between Dielectric loss values and temperature of transformer bushings with different moisture concentrations have been obtained. And the influences of temperature on the moisture detection of transformer bushings are also studied. These results can provide reference for the accurate dielectric loss detection of transformer bushings and the diagnosis of dampness degree.
The Effects of Different Planetary Boundary Layer Schemes on the Meteorological and Environmental Elements in winter stable weather of Shenyang
Authors: Wang Yangfeng , Lu Zhongyan , Zhang Guangmei , Ren Wanhui , Wan Xujiang , Ma Yanjun , Zhang Yunhai 
Published: July 2020

Abstract
Two planetary boundary layer schemes (YUS and MYJ) in the WRF-CMAQ model, are selected for sensitivity simulation, and the simulation capabilities of different planetary boundary layer schemes to meteorological elements and PM2.5 concentration distribution are analyzed from December 17th to December 20th in 2016. The results show that using the YSU and MYJ schemes can well simulate the spatial distribution and diurnal variation characteristics of temperature, wind speed and PM2.5 concentration on the ground under the background of stable weather in winter. It is sensitive to temperature, wind speed and PM2.5 concentration on the ground using different planetary boundary layer parameterization schemes. The simulated wind speed is relatively large, and the maximum deviation can reach about 2m/s. The deviation of wind speed using the MYJ scheme is relatively small than YSU, which is closer to the real value. There has a lower PM2.5 concentration value using YSU than MYJ at night, however the daytime (mainly from 11:00 to 18: 00) YSU scheme is relatively higher than MYJ. The deviation of PM2.5 concentration on the ground using the MYJ scheme is relatively smaller than YSU, and the characteristics of daily variation is closer to the real situation. Overall, the MYJ scheme is better than YSU in air pollution simulation.
1D seismic site response analysis for a soil deposit at Baoding city
Authors: Jia Qijun , Wang Duguo , Zhai Fenlou , Liu Xiaoyu 
Published: July 2020

Abstract
Based on 1D equivalent linear method, the effect of a soil deposit at Baoding city on wave propagation was analysized. Firstly, probabilistic seismic hazard analysis (PSHA) was performed, and the peak accelartion and response spectrum of outcrop with exposure rate over 63%, 10% and 2% in 50 years are obtained; secondly, the artificial earthquake ground motions used as input motion of soil deposit were synthesized; lastly, 1D equivalent linear analysis was performed to evaluate the effect of soil deposit on wave propagation. Results show that soil deposit has a great influence on wave propagation. The intensity of input motion also plays an important role on the properities of seismic ground motion.
Structural design and analysis of Yanqi Lake ecological development Demonstration Area in Beijing
Authors: Zhang Xiaomeng , Liu Wenting , Gao Bo , Ding Weilun , Yang Jie , Li Sen , zhou Yilun 
Published: July 2020

Abstract
Beijing lake yanxi ecological development demonstration project, a total of 60 square meters, consists of eight 50 tower and garage, tower, a total of seven family, layer number ranged from 8 to 15 layers, structure with shear wall structure, garage mainly adopts frame structure, through the choice of different structure and introduction, the structure system is analyzed.
Study on creep characteristics of unsaturated sericite schist residual soils
Authors: Liu Huan , Lian Xiao-lan , Nie Guang-ying , Zhang Qing-wen 
Published: July 2020

Abstract
Sericite schist is an extremely soft rock, which is characterized by obvious rheological properties and large creep deformation. The residual soil of Sericite schist is in unsaturated state for most of the time. When encountering water, it interacts with water, which has a great influence on its strength. In this paper, one dimension and three axis creep tests of Sericite schist residual soil are carried out by using unsaturated quadruple consolidation apparatus and unsaturated triaxial creep apparatus. The results show that the creep process of the residual soil can be divided into three stages: rapid growth stage, slow growth stage and stable stage. The creep deformation of triaxial test is larger than that of one dimension.
Effects of different hormones on germination and callus induction of hemp seeds
Authors: He Bingqing , Shen Penglin , Zheng Hongjuan , Chu Yi , Guan Jinqiu , Li Lan 
Published: July 2020

Abstract
The purpose was to induce and treat hemp seeds and callus, compare the methods to increase the germination rate of hemp seed, obtain suitable disinfectant for hemp seed, and different hormone ratios to promote callus growth. GA3, 6-BA, and IAA were used to induce hemp seed germination, and the effects of different hormones and different concentrations on hemp seed germination were studied. Tissue culture was used to induce hemp seeds to select suitable hemp seeds disinfectant and time; callus was induced by using hemp aseptic seedling leaves. GA3 with a concentration of 20-80mg/L and IAA with a concentration of 20-40mg/L can promote the germination of hemp seeds; the best disinfection method of hemp seeds is: 70% ethanol for 1min + 10% NaClO for 18min; the most the combinations beneficial to callus growth were: 2.0mg/L 6-BA+0.5mg/L NAA. GA3 and low-concentration IAA can promote the germination of hemp seeds; the combination of 70% ethanol and 10% sodium hypochlorite has the best disinfection effect on hemp seeds; 6-BA+NAA can obtain good quality hemp seeds hemp callus.
Effect of Dry-Wet Cycle on Stability of Granite Residual Soil Slope
Authors: Wang De-Yong , Zeng Qing-Jun , Wang Jing , Zhou Mi 
Published: July 2020

Abstract
The dry-wet cycle has a significant effect on the shear strength of the granite residual soil, which will affect the stability of the slope. A numerical model of the road cutting slope considering the strength change of the granite residual soil under conditions of dry-wet cycle was established. The numerical model was compared with the previous research results to obtain a good agreement, indicating the validity of the model established. Then several influence factors such as the number of cycles, initial cohesion, friction angle, initial slope angle, excavation slope angle and other factors are considered, and the parameter analysis of the stability development of the road cutting slope with the strength changes of the granite residual soil under dry and wet cycling conditions is considered. The research results show that the dry-wet cycle has a great impact on the stability of the road cutting slope of granite residual soil, which reduces the slope stability by about 10-30%. The conclusions of this paper provide a certain theoretical guidance for the design and application of the roadside slope engineering of granite residual soil.
Theoretical Analysis and Finite Element Verification on Natural Vibration of Special Water Tower Structure System
Authors: Ji Jing , Kang Wei , Xu Ming , Li Zhihui , Jiang Liangqin 
Published: July 2020

Abstract
In order to master the dynamic characteristics of this special engineering structure, based on the advanced structural dynamics, the water tower structure is simplified as a single degree of freedom vibration model according to the mass concentration method, and the analytical solution of the free vibration fundamental frequency of the water tower structure is derived. The three-dimensional finite element model of the water tower is established by using the finite element software ABAQUS, and the modal analysis of the water tower structure is carried out. The simulation fundamental frequency and vibration mode of the water tower structure are obtained. Through comparison, it can be seen that the analytical solution of the free vibration fundamental frequency of the water tower structure is in good agreement with the simulation result, which verifies the correctness and application scope of the analytical solution of the free vibration fundamental frequency of the water tower structure. It can be seen that the mass concentration method proposed in this paper can accurately calculate the fundamental frequency of water tower structure. Finally, the seismic design suggestions of water tower structure are given.
Determination principle of residual Gas and Analysis of influencing factors on the results of Laboratory Measurement
Authors: Yang Hongwei , Han Bing , Qian Zhiliang 
Published: July 2020

Abstract
In view of the current situation that the concept of residual gas content in coal seam in our country is relatively chaotic, the definition of residual gas content and the measurement principle of degassing and desorption methods in “The direct method of determining coalbed gas content in the mine” are analyzed. The standard unified method and the explicit concept are proposed. Through the laboratory desorption experiments in some mining areas, it is found that the residual content of gas and the degree of coal metamorphism are positively correlated as a whole. There is a negative correlation between the content of ash and internal moisture in coal and the residual content of gas. The order of the residual gas content of different sampling methods is as follows: core sampler> hydraulic slag sampler ≈ wind slag sampler, coal structure is complete, the change range of measured data is the smallest with core sampler, which can truly reflect the law of coal desorption and status.
China’s Incubator Industry Efficiency Evaluation——Based on DEA Analysis of Provincial Data
Authors: Jin Lanqing 
Published: July 2020

Abstract
This paper evaluates the efficiency of China’s incubator industry based on DEA (Data Envelopment Analysis) of provincial data in 2017. We use DEA method to test the efficiency of industrial input-output. Through the empirical test we find that the overall efficiency of China’s incubator development is high, while the efficiency of various regions is not balanced, and some provinces are inefficient. In the end, we put forward suggestions at government level, the intermediary organization level and incubator level. At the government level, the systems and mechanisms should be innovated, market-oriented reforms should be put forward, and the enthusiasm for investment and participation should be stimulated. The intermediary organizations should actively establish cooperation platform and invest with the incubator. The incubators should enhance their own value-added ability, give play to the advantages of the group to attract more investment.
The Impact of Cultural Festivals on the Development of Rural Tourism - A Case Study of Da Jia Matsu Pilgrimage
Authors: Lin Hsiao-Hsien , Hsu Chin-Hsien , Liu Chih-Yu , Cheng Bai-You , Wang Ching-Hsin , Liu Jen-min , Jhang Shangwun 
Published: July 2020

Abstract
This study aimed to the impact of cultural festivals on the development of rural tourism to explore. We took the Da Jia Matsu Pilgrimage as an example, and investigated the residents of the counties and cities along the pilgrimage route. SPSS for Windows 22.0 was used to conduct the t-test, and the descriptive statistical analysis to 2072 samples. The research result is residents in different regions regarded that the pilgrimage could unite the people, improve community environments, preserve traditional culture, maintain public facilities, and increase public infrastructure. Male residents argued that the pilgrimage could only unite the people, while female residents asserted that it could increase public infrastructure and service measures, preserve traditional monuments, and improve community environments; however, it also resulted in traffic accidents and the disturbance of living spaces. The research conclusion is residents of different places and genders have different understandings in terms of the economic, social, and environmental impacts on the Da Jia Matsu Culture Festival. The research suggestion is the schedule and investigation of the places along the pilgrimage can be extended to include other cultural festivals and different impacts on stakeholders.
The Influence and Measures of Developing Sightseeing and Leisure Agriculture on Rural Economic Development
Authors: Yang Jian 
Published: July 2020

Abstract
This paper starts with the analysis of the current situation of China’s modern sightseeing and leisure agriculture, and then makes an in-depth analysis on how to actively develop sightseeing agriculture in the contemporary era, including detailed discussion and planning on improving the quality of residents, scientifically planning sightseeing agriculture, strengthening the attention of the countryside to modern sightseeing agriculture, and increasing the cost input in the development of sightseeing agriculture. Furthermore, this paper specifically expounds the impact of the development of sightseeing and leisure agriculture on the development of rural economy, starting from the reality of rural economy, promoting the rapid development of sightseeing and leisure agriculture while promoting the progress of rural economy.
Research on the Crack Resistance and Bearing Capacity of Concrete Roadway Enhanced by Carbon Fiber Mesh and Carbon Fiber Short Cut Wire
Authors: Chen Lei 
Published: July 2020

Abstract
Shotcrete support technology can play a certain role in strengthening and anti-permeability of underground roadway. However, the lack of crack resistance and bending resistance seriously affects the function of shotcrete support. In this paper, the crack resistance and bearing capacity of underground concrete shotcrete layer were improved by means of high density carbon fiber mesh (CFM) embedded in prefabricated layer and carbon fiber short cut wires (CFSC) with different content of uniform cloth, which was focused on the synergistic strengthening mechanism between CFM and CFSC. The results show that the addition of high density CFM can significantly improve the bearing capacity of concrete shotcrete layer, but the improvement of crack resistance is not obvious. The addition of CFSC (with a content of 2% and a length of 3 mm) can significantly increase the initial crack load of concrete shotcrete, thus improving the crack resistance performance, but it has no obvious effect on the bearing capacity. Adding CFM and CFSC together can further significantly enhance the bearing capacity and crack resistance of concrete shotcrete layer and give full play to the synergistic enhancement effect between the two.
Study on the Development Effect Standard of Classified Well Groups for Polymer Flooding in Class II Reservoirs
Authors: Sun Xiangqi 
Published: July 2020

Abstract
Because of the development characteristics of the second type reservoir, the heterogeneity of the reservoir is obvious, and the development effect of polymer flooding in different well groups is quite different, which is not conducive to the adjustment and evaluation of later development. Therefore, it is necessary to classify the polymer flooding well groups in the second type reservoir according to the dynamic and static physical parameters, and evaluate the development effect of different types of polymer flooding well groups on this basis. By analyzing the dynamic and static data of polymer flooding blocks in type II reservoirs, this paper determines the influencing factors of well group classification evaluation, establishes the method of well group classification combined with grey correlation method and mathematical statistics analysis, uses reservoir numerical simulation technology to predict the development effect of polymer flooding for different types of well groups, gives the development effect standards of polymer flooding for different types of well groups, and plays a certain role in adjusting the development effect of polymer flooding in oilfields.
Laser Resonant Photoacoustic Spectrometer for Methane Detection
Authors: Yun Yuxin , Zhao Xiaoxiao 
Published: July 2020

Abstract
A laser resonant photoacoustic (PA) spectrometer has been designed for methane detection. The design ideas and methods of the device are discussed in detail. Relevant tests are designed and done for testing and verifying the important parameters of the device. The experimental results show that the radiation wavelength of the distributed feedback (DFB) diode laser increases approximately linearly with the increase of operating temperature or injection current, and the change gradient of radiation wavelength to operating temperature is greater than that to injection current. Under the condition of low gas concentration and low laser power, the relationship between PA signal, laser power and methane concentration is linear.
A New Method for Measuring the Complex Permittivity and Permeability of Sintered Material FeSiAl Used for Microwave-Absorbing Load
Authors: Zhang Fang , Shen Lianguan , Pei Yuanji 
Published: July 2020

Abstract
This paper describes a new method for measuring the complex permittivity and permeability of a sintered microwave-absorbing material. Thorough knowledge about microwave-absorbing materials is very important for the design and construction of accelerators. Although many methods of measuring the permittivity and permeability of a material have been developed and tested successfully, they are not suited to cases in which the microwave-absorbing material is coated on an oxygen-free high-conductivity copper (OFHC) surface by means of a special sintering technology. Thus, a new method is developed through a combination of testing and simulations. The complex permittivity and permeability of the microwave-absorbing material FeSiAl was obtained by this means, and a collinear load was designed based on the measurement results. The linear accelerator (LINAC) with the collinear load has been running well.
Review of Polymer Self-lubricating Coatings
Authors: Feng Qing , Zou Shuai , Li Haoming , Dou Mingyuan , Huang Fuchuan 
Published: July 2020

Abstract
In recent years, polymer self-lubricating coatings have become a research hotspot of composite materials and tribology workers because of the characteristics of matrix polymer and solid lubricant. Based on a large amount of literature at home and abroad, the characteristics, structural design and preparation technology of polymer self-lubricating coatings are reviewed, and the research trend of polymer self-lubricating coatings is prospected.
Research on Anti-cavitation Coating Performance of Shipping Fluid Machinery
Authors: Hu Yiming , Wang yuansheng , Ding Zhangxiong , Wu Jie , Hou yingzhe , Wu hao , Zhou Longyu , Zhu haojiang , Gao Haitao 
Published: July 2020

Abstract
In this paper, micro-nano-structure and nano-structure WC-based coatings were prepared by supersonic flame spraying technology for the cavitation of fluid mechanical parts. We used SEM and XRD to analyze the coating structure, mechanical properties and electrochemical properties. We also studied the cavitation’s mechanism of the coating in 3.5% NaCl simulated seawater medium. The results show that the micro-nano structure WC-10Cr-4Cr coating prepared by supersonic flame spraying has a micro-nano structure and added 4% Cr element, while the nanostructure WC-12Co coating is prone to have decarburization during the preparation process, resulting in generating a certain amount of W to reduce the hardness of the coating. Therefore, the micro-nano structure WC-10Cr-4Cr coating has better porosity, micro hardness and crack toughness properties. In the simulated seawater cavitation environment, the coating has more excellent anti-cavitation performance.
Application research of steel fiber rubber regenerated concrete engineering
Authors: Chen Yanyan , Liang Xiaoguang , Liang Lijun 
Published: July 2020

Abstract
With the booming development of China’s building industry, the recycling of building materials can achieve the effect of reducing energy consumption. For the construction and development of rural areas, rural roads and small water conservancy projects are also being gradually optimized and transformed, in which a lot of waste building materials will be generated. With the progress of science and technology and the in-depth research on regenerated concrete, the regenerated concrete began to be promoted everywhere. This paper elaborates the performance of the new steel fiber regenerated concrete rubber, considered from the aspects of reducing engineering cost and shortening the construction period, discusses application of regenerated concrete to rural road construction, small water drains and other projects, so as to provide a reference for the use of renewable resources in rural areas, and promoting the development of more scientific and ecological construction industry.
Effect of CO2/N2 on explosion vent behavior of lycopodium/air mixtures in a 20-L sphere
Authors: Hou Yujie , Yu Jianliang , Jiang Zixu , Yan Xingqing , Ji Wen tao , Yu Xiaozhe , Lv Xianshu 
Published: July 2020

Abstract
To investigate the inerting effect of CO2/N2 on the explosion venting behaviors of lycopodium/air, a standard 20 L spherical chamber, with a thermo-gravimetric analyzer TGA Q500 was adopted to determine the explosion severity and mechanism of inhibition. In the heat flow of the N2 atmosphere and CO2 atmosphere, the pyrolysis processes of lycopodium powder show obvious differences from 370°C approximately. Through the whole explosion process, CO2 plays a key role and it can effectively cut off the contact between dust and oxygen. The particles with free radicals decomposed from heat lycopodium powder such as nitrogen and carbon will react lowly under the blocking effect of CO2. Meanwhile, carbon, nitrogen and other atoms can participate in chain reaction and react with active groups, which greatly reduces the risk of powder explosion. The explosion pressure Pex
and the maximum reduced pressure Pred
were obtained with lycopodium powder explosion under a wide range of CO2 concentrations. Compared with the pure physical suppression principle of N2 in the explosion process, CO2 can participate in the explosive reaction more effectively, and hence has a better suppression effect of the explosion than N2. An unexpected behavior has been found in relation to the explosion venting behavior. Under the smaller vent diameter or at higher static activation overpressures, the suppressive effects of carbon dioxide to lycopodium/air venting explosion are better than those of nitrogen.