bluuebunny/crossref_metadata_2025_split huggingface dataset:
Evaluating the vulnerability of agricultural drought in Hetao Irrigation Area of Inner Mongolia Based on super efficiency DEA
Authors: Huang Jing , Fu Peng , Tong Jinping , She Jingwen , Zhang Jingxuan 
Published: November 2019

Abstract
Drought vulnerability has become a key point for agricultural sustainable development in such a changing context. In this study, Hetao Irrigation Area which is the major grain-producing area is selected as the research area, where frequent drought threatens food production. Firstly, super efficiency data envelopment analysis (SEDEA) model is used to evaluate the agricultural drought vulnerability of Hetao Irrigation Area from 1997 to 2016. And then the spatial and temporal differences of vulnerability are analyzed. Moran’s I Index is also adopted for further spatial autocorrelation analysis. The results show that the vulnerability decreases with the investment of agricultural science and technology, and the drought vulnerability in different irrigation fields are affected by the irrigation area coverage rate. The drought vulnerability is much higher in the east of Hetao Irrigation Area than that in the west due to the worse water supply in the east. And the vulnerability in Wuyan is the highest due to the largest cropping sown area, while Linhe stays the lower value due to the highest GDP.
Influence Mechanism of County Scale and Structure on the Household Carbon Emissions and its Planning Strategies
Authors: Feng Lanmeng , Zhang He , Wang Rui 
Published: November 2019

Abstract
In order to achieve China’s national contribution goal of 60% to 65% reduction in CO2 intensity per unit of GDP from 2005-2030 at the climate conference in Paris, China needs to make more efforts in low carbon development. The county is an important level for China’s urban-rural carbon and oxygen planning, and it still has a large potential for carbon emission reduction. This study mainly explores the influence mechanism of county scale and structure on household carbon emissions. First of all, I build a county scale and structural factor index system, and analyse the impact mechanism on this basis. Secondly, I select 10% of the county-level administrative units, and empirically analyse the relationship between factor indicators and the household carbon emissions in terms of population, economy and land use. Finally, based on the results of the empirical analysis, the impact mechanism is re-discussed, and the corresponding county planning strategy is proposed accordingly. The results of this study and policy recommendations have guiding significance for promoting institutional arrangements for low-carbon development in counties.
Application research of BIM5D technology in engineering projects
Authors: Jiao Chen , Xinming Zhao , Hongna Yang , Tao Yang , Jiayong Wang 
Published: November 2019

Abstract
Based on BIM technology, BIM3D model is built through Autodesk Revit software, structural conflicts and collisions are checked through Autodesk Navisworks Manage software, and construction simulation is conducted, so that BIM5D information base is integrated with new point cloud 5D calculation software and new point list cost software which realizes 5D management. By means of construction simulation for further optimization model, the fine management of construction process is realized.
Study on Treatment of Uranium-Containing Wastewater by Biosorption
Authors: Hu Juntong , Lv Yijin , Cui Wei , Chen Wansi , Li Shiyou 
Published: November 2019

Abstract
This paper is going to introduce the research status of the treatment of uranium-containing wastewater by biosorption; the definition and advantages of biosorption technology and the types of biosorbents; the effects of pH, temperature and coexisting ions on the adsorption efficiency of biosorption; and the mechanism of biosorption of metals: precipitation, cell enrichment, oxidation and reduction, and enzymatic action. Finally, it provides a direction for further research in the future.
Study on Optimal Parameters Optimization of High Drilling Field Based on the Theory of “Three Vertical Zones” of Overlying Strata
Authors: Pi Xiyu 
Published: November 2019

Abstract
In order to make gas accumulation at the corner of 2106 working face safer, this paper analyzes the mechanism of high-level boreholes field when eliminating the gas accumulation of upper corner using theoretical analysis, numerical simulation and field measurement method, calculates the optimal position of high boreholes based on the theory of “three vertical zones” of overlying strata, and verifies the corresponding numbers using FLAC3D software. In this way, this paper optimizes the optimal layout parameters of the high-drilling field through on-site inspection and eliminates the danger caused by the gas accumulation in the upper corner.
The secondary nature and light absorption properties of water-soluble organic carbon in the winter of Beijing
Authors: Li Anna , Deng Xueliang , Yang Nana , Zhou Jiacheng 
Published: November 2019

Abstract
From December 26th to 28th, 2014, Beijing was hit by the regional severely polluted weather, during which the daily average mass concentration of PM2.5 was three times that of non-polluted days. Water-Soluble Organic Carbon (WSOC) concentrations (6.8 μg C/m3) in the polluted day were four times that of the non-polluted day (1.7 μg C/m3). The high correlation between WSOC and Secondary organic carbon (SOC) indicated that WSOC and SOC shared similar source and formation mechanism. The high correlation between WSOC and biomass burning tracer (K+) indicated that biomass burning was an important source of WSOC in winter. This paper measures the light absorption intensity of water-soluble brown carbon on the average light absorption (Abs365) of WSOC between 360mm and 370 nm. The absorption spectrum analysis of WSOC showed that Abs365 ranged from 0.80-15.26 with an average of 3.7 Mm−1. The AAE value was 3.42 with the fluctuation range between 1.8 and 7.7. The mean value of MAE was 1.87 m2/g, with no significant difference between day and night. The WSOCMAE in polluted days was 1.96 m2/g and in the non-polluted day was 1.86 m2/g. In general, the absorbance capacity of WSOC in the polluted days was greater than that in the non-polluted days.
Study on urban domestic waste recycling process and trash can automatic subdivision standard
Authors: Peng Huaming , Zhou Junxiang 
Published: November 2019

Abstract

Objective In order to propose a garbage classification standard suitable for automatic subdivision of intelligent classified trash cans, and to improve the garbage recycling process. Methods Based on the status of urban domestic waste recycling process, process analysis and comparison method was used to analyze the related problems. According to the composition and nature of urban domestic garbage, the automatic subdivision standard suitable for intelligent classified trash cans was proposed. Result It is concluded that the traditional process has the problems of centralized treatment and vague positioning of each subject. Therefore, the keys should focus on the front-end classification to removal centralization, distinguish the positioning of each subject clearly and use technology to drive the classification. From these, the paper analyzes the composition and nature of recyclable garbage and harmful garbage to propose the automatic subdivision standard. Conclusion Only by making full use of people’s subjective initiative, using intelligent classified trash cans as carriers to subdivide automatically, can improve the garbage recycling process. This has important practical value and significance for solving the problem of urban diseases in China.
Destruction Mechanism and Prevention Technique of the Tunnel of Gushing-Water Roof in Xinyi Coal Mine
Authors: Feng Tantan , Zhu Shaohui , Hao Dazhen , Zhu Xinming 
Published: November 2019

Abstract
In view of the deformation and failure of the tunnel of gushing-water roof in Xinyu Coal Mine, this paper analyzes the characteristics and mechanism of tunnel deformation and failure by the combing laboratory experiments, theoretical analysis, and on-site industrial tests. The results show that: 1) the deformation of the gushing-water roof is significant with the maximum deformation value of 700 mm, and the bolt cable and the I-beam bracket are seriously damaged; 2) the failure of 1505 mudstone tunnel roof is considered to be the result of its low strength and easy argillization when it is exposed to water, lack of waterproof measures, unreasonable support methods, etc.; 3) this paper proposes measures such as full anchor cable support, waterproof anchoring agent, and drainage holes, and clarifies their control mechanisms. The field practice shows that the deformation of the ventilation tunnel tends to be stable after about 30 days of the implementation of the plan, thus providing reference for the surrounding rock control in similar tunnels.
Stress Observation and Strata Behavior in Fully-mechanized Coal Face of Shallow Coal Seam
Authors: Bao Zhao Ren , Ming Zheng Zhong 
Published: November 2019

Abstract
In order to solve the problem of the strong ore pressure in the mining process of a shallow buried coal seam working face, the ore pressure law of a shallow buried coal seam working face was observed. According to the observation results of ore pressure, the law and characteristics of ore pressure on the working face of shallow buried coal seam are analyzed, the basic law and parameters of roof movement and the roof plate falling situation on the end face on the working face are obtained, and the rationality of the support is studied.
Numerical Research of Movement Characteristic and Deposition Ratio on Cylinder Wall of Secondary Water Droplet between Penultimate Stage and Last Stage
Authors: Yan Chuan-wu , Wang Bo , Chen Jian 
Published: November 2019

Abstract
Secondary water droplet between the penultimate and last stage of a 300 MW steam turbine was researched by CFD on the basis of a two-phase flow mathematical model for steam and water droplet, and the Lagrangian methed was adopted to solve the discrete transport equation of water droplet. It indicated that secondary water droplet shows tendency to slop up to and get deposited on cylinder wall. The water deposition ratio on cylinder wall will be greater as the water droplets size increases or the blade height where the water droplets begin to move rises. Local deposition ratio increases as the blade height heightens according to the water deposition on cylinder wall behind penultimate stage and distribution of the secondary water droplet and steam moisture.
A Summary of Study on Slope Stability under the Coupling of Vibration and Rainfall
Authors: Chen Wenzhao , Fan Jiaqing , Wei Xiaoqing , Yang Kai , Yao Xiangrong 
Published: November 2019

Abstract
Systematically discussed the significance of the study on the influence of the coupling of vibration and rainfall on the stability of slope. The mechanism of slope hazards under the coupling action of vibration and rainfall was pointed out. The research status of the effects of vibration and rainfall coupling on slope stability is reviewed from three aspects: basic theory, analytical calculation method and application in slope engineering. Based on the analysis of the status quo of these studies, this paper proposes the problems and shortcomings in the study of the influence of the coupling of vibration and rainfall on the stability of slope.
Experimental Investigation on the Effect of Vertical Greening Facade on the Indoor Thermal Environment: A Case Study of Dujiangyan City, Sichuan Province
Authors: Peng Ying , Huang Zhu , Yang Yanqing , Wang Peng , Hou Chaoping 
Published: November 2019

Abstract
The vertical greening system is more and more widely used in architectural design and it is one of the sustainable development trends of new buildings. The green vertical façade can alleviate the urban heat island effect and improve the indoor thermal environment. To study the effect of vertical greening on indoor temperature and humidity and wall surface temperature, this study carried out a comparative experiment between two rooms that have completely identical structures and functions with or without vertical greening in Dujiangyan. According to the research, when vertical greening is adopted, the room temperature is reduced by 2.2°C on average and the surface temperature of the exterior walls is lowered by 13.9°C. Vertical greening can effectively reduce the temperature of the interior and exterior surfaces of the wall, improve the indoor thermal environment and better achieve building energy efficiency.
Introduction performance of four excellent and new citrus varieties in Jintang, Sichuan
Authors: Wang Tie , Zhang Junlin , Xiong Bo , Qiu Xia , Wang Jun , Sun Guochao , Wang Zhihui 
Published: November 2019

Abstract
In order to further enrich the structure of citrus varieties in the Jintang area of Sichuan, and to solve the problems of old and single varieties and relatively concentrated listing periods. In this experiment, four excellent and new citrus varieties, ‘Kanpei’, ‘Niahinoka’, ‘Or’ and ‘Qingfeng’ is introduced, and the local cultivar ‘Shiranui’ is used as a control. The traits and fruit quality indicators are investigated, measured and analyzed. The results show: The ‘Kanpei’ and ‘Or’ trees are strong, the ‘Niahinoka’, ‘Qingfeng’ and ‘Shiranui’ are medium, ‘Or’ has the highest ratio of sugar to acid, ‘Niahinoka’ has the highest vitamin C and soluble solids. Compared with the control, the ratio of sugar to acid and the per mu yield in the ‘Niahinoka’ is 27.78% and 13.62% higher than ‘Shiranui’, ‘Qingfeng’ performance is poor. According to a comprehensive analysis, ‘Kanpei’, ‘Niahinoka’ and ‘Or’ are suitable for introduction, and ‘Qingfeng’ is not suitable for introduction.
Experimental Study on the Strength of Fly Ash Geopolymer with Alkali Activator Modulus
Authors: Cui Jingyu , Zhang Wuyu , Ji Gang-ao , Tong Guoqing , Xie Banglong 
Published: November 2019

Abstract
The variation of strength of fly ash geopolymer under different alkali activator modulus is studied. In this paper, three samples with modulus of alkali initiator 1.0, 2.0, 3.0 were prepared by laboratory test, and the unconfined compressive strength, SEM scanning and XRD analysis were conducted. Results show that the strength of the fly ash geopolymer negative correlation with alkali excitation agent module, with higher modulus alkali excitation agent, the strength of the polymer decreased obviously. From the micro perspective, the lower modulus of the sample of the microstructure appear more dense, gelling material produce more obvious at the same time. From the part of XRD, different modulus of the sample composition are same basically.
Study on Soil Microbial Community Structure of River Wetland in Tumen River Basin
Authors: Hong Fengyang , Chang Yuge , Fan Zhiyu , Zhu Weihong , Jin Mingji 
Published: November 2019

Abstract
This study explored the relationship between soil microbial community structure and soil environmental factors in river wetlands of Tumen River Basin by analyzing the soil microbial community structure and combining soil environmental factors.As a result, there were significant differences in microbial community diversity among river wetlands in the Tumen River Basin. Proteobacteria and Actinobacteria were the abundant dominant phylum of microbial, moreover,Actinobacteria and Alphaproteobacteria were the dominant class of microbial.Soil environmental factors such as soil organic matter, soil total nitrogen and soil total potassium are the main factors affecting the change of microbial community structure in river wetlands of Tumen River Basin.
Analysis of ground temperature variation in differential settlement of China-Russia crude oil pipeline: field monitoring and numerical simulation
Authors: Bi Guiquan , Song Zhengmin , Mu Yanhu , Li Guoyu 
Published: November 2019

Abstract
In vast areas of rich frozen soil, the intense heat exchange between the hot oil pipeline and surrounding soil results in the continuous melting of permafrost under the pipeline and the continuous sinking of the pipeline. Moreover, the settlement rate and depth of the pipeline are also different due to the influence of ice content and the thickness of rich frozen soil layer. Therefore, in this paper, based on the field measured data, by adopting the method of numerical simulation, the temperature rise process of the soil around the pipeline under the condition of different subsidence rate and different thickness of rich frozen soil layer is studied. The results show that with the increase of the thickness of the frozen soil layer, the degradation depth of the upper limit of the artificial frozen soil in the lower part of the pipeline increases gradually. Under the same thickness of the frozen soil layer, the influence of the settlement rate of the pipeline on the upper limit of the artificial frozen soil in the lower part of the pipeline mainly concentrates on the initial operation stage of the pipeline; with the increase of the thickness of rich frozen soil layer, the upper limit difference of artificial frozen soil under different settlement rates of pipelines at the same time increases gradually. Of different sedimentation rate and the rich soil layer under the condition of ice -6 m depth of geothermal heating process monitoring, the geothermal heating process can be divided into three stages: melting stage (I), rapid heating stage (II), slow heating stage(III). With the increase of the settling depth, the duration of the phase I and II is significantly reduced, the heating rate is significantly promoted, the duration of phase III is increased significantly and the heating rate is gradually reduced.
Evaluation of Negative Effect on Groundwater Environment Caused by Weathered Granite Tunnel Construction with Mining Method Based on GIS
Authors: Zhu Liubing , Chen Lingqiang , Pan Yiheng , Hu Wenyi , Li Ping , Feng Yong 
Published: November 2019

Abstract
In order to figure out the negative effect on groundwater environment caused by weathered granite tunnel construction with mining method, the influence factors were considered comprehensively to establish the evaluation index system and classification standard for negative effect on groundwater environment. The fuzzy comprehensive evaluation and analytic hierarchy process were used to quantify the evaluation indexes and determine the weight of indexes. The system to evaluate the negative effect caused by tunnel construction with mining method on groundwater environment was developed based on GIS and was applied to a tunnel section of Guangzhou Metro line 21. The research results show that: the permeability of rock, the grouting effect and the waterproof and drainage are the major influence factors. The negative effects of DK25+984.0 ∼ DK26+000.0 and DK26+000.0 ∼ DK26+434.0 mileage sections are strong and medium, respectively, which coincided with the actual situation. This research can provide a scientific approach to evaluate the negative effect caused by tunnel construction with mining method on groundwater environment.
A Comparative Study on the Treatment of Eutrophic Water by Aeration and Algae Fish
Authors: Yang Xi , Huang Haiyu , Huang Longxiang , Li Dejun , Wang Suyu , He Minxuan , Li Di , Xu Kun 
Published: November 2019

Abstract
With the introduction of relevant national policies, large numbers of environmental projects were carried out for remediation and quality improved, but in the main indicators of long-term quality control and operational cost are still a big issue. In this study, the effects of water quality control by aeration and algae-eating fish species, Mugil cephalus and Salmoniformes, were applied to the test in a landscape pond. The results showed that both ways had similar effect on the pollutants, CODCR, total nitrogen and total phosphorus decreased by about 56%, 59% and 35% respectively, and the water transparency also improved significantly. However, before the application of ecological management in real project, detail environmental conditions and pollution load analysis should be carried out for ensuring safety and efficiency.
Design of a continuous fixed film photocatalytic reactor based on Bi2WO6/ZnFe2O4 magnetic photocatalyst and application in tetracycline degradation
Authors: Li Chenyang , Lv Chen , Wang Yu , Zhong Shuang 
Published: November 2019

Abstract
A kind of continuous magnetic fixed-film reactor was designed and applied in tetracycline degradation based on the Bi2WO6/ZnFe2O4 magnetic photocatalyst. The effects of light intensity, initial TC concentration and HRT on the photocatalytic effect were investigated. At the pollutant concentration of 51.58 mg/L, light intensity of 3.20×105 lux and HRT of 94 min, the TC removal rate in the reactor was enhanced to above 90% and maximized to 94.05%. From the different pollutant concentrations, the specific outflow criterion could be achieved by regulating the HRT within a certain range, so as to maximize the reactor use efficiency. Compared with conventional fixed-film reactors, the new reactor had larger reaction contact area and avoided the defect of catalyst shedding.
Simulation Study of Tc Composite Bullet Penetrating Ceramic Composite Target
Authors: Li Shiji , Rong Yinlong 
Published: November 2019

Abstract
In this paper, using ls-dyna numerical simulation software to simulate the penetration process of ceramic composite target. Studying respectively the penetration ability of TC/steel composite bullet and conventional steel bullet, TC/tungsten alloy composite bullet and conventional tungsten alloy bullet. Finally, finding the different results of the four kinds of kinetic energy projectile penetrating ceramic composite target under the same size and speed conditions. The results show that the penetration ability of TC composite bullet with high-speed is better than that of the conventional metallic bullet.
Optimization of insoluble dietary fiber preparation technology from Rosa roxburghii Tratt pomace by enzyme method
Authors: Zhou Xiaoli , Zhu Guangxu , Lu Ying , Du Bin , Lin Dong , Ran Zhiyong 
Published: November 2019

Abstract
In order to avoid Rosa roxburghii Tratt residue wasted. The Rosa roxburghii Tratt insoluble dietary fiber was extracted by enzyme method, and the temperature, time, pH and enzyme amount were analyzed by amylase, glucoamylase and protease through single factor and orthogonal experiment. The results showed that the best process of enzymatic extraction of IDF from Rosa roxburghii Tratt residue was as follows: the enzymatic hydrolysis 40 °C and 70 min, pH 6.0, and the amount of amylase 10 mL; the enzymatic hydrolysis 40 °C and 30 min, pH 6.0, and the amount of protease 4 mL; the enzymatic hydrolysis 50 °C and 50 min, pH 5.0, and the amount of glucoamylase 8 mL; The average extraction rate of the IDF of Rosa roxburghii Tratt residue was 92.41±1.99%, it was dark yellow and could be used as a food ingredient. The experimental method is simple and convenient. It provides a new way for the comprehensive utilization of Rosa roxburghii Tratt, and lays a foundation for the development and research of Rosa roxburghii Tratt.
Magnolol–Coumarin–Phenylbutyric acid Conjugates: An Anticancer Prodrug via multiple targets
Authors: Tao Ali , Song Zurong , Feng Xuehua , Hu Bo , Lei Xuan 
Published: November 2019

Abstract
We present here, the design and synthesis of a phenylbutyric acid-magnolol-coumarin conjugates (5). Compound 5 is a multifunctional molecule composed of magnolol, coumarin, phenylbutyric acid as model active drugs via ester. Upon entering tumor cells, ester bond cleavage occurs as well as active drug magnolol, coumarin and phenylbutyric acid release to attack cancer cells. In vitro anti-proliferation experiments showed that the inhibitory activity of compound 5 against HepG2, MCF-7, A431 and A549 cells was significantly higher than that of its single parent compound. Moreover, compound 5 had a long-term effect. Due to fluorescence of compound 5, it can serve as a fluorescence imaging agent and its uptake can be monitored. Compound 5 may provide a reference for the design of new derivatives of magnolol.