bluuebunny/crossref_metadata_2025_split huggingface dataset:
Application of artificial intelligence techniques in prediction of cyclic resistance ratio (CRR) of clean sands
Authors: Akhila V , Adarsh S 
Published: July 2020

Abstract
Liquefaction study by in-situ tests like SPT and CPT are very complicated and time consuming. Cyclic Resistance Ratio (CRR) of a soil is controlled by various properties of the soil. Artificial intelligence techniques can identify relationship between various parameters which influence the liquefaction phenomenon from sufficiently large data set to generate models connecting those parameters. Models for prediction of cyclic resistance ratio (CRR) of clean sand is generated using MGGP, GPR and M5’ model tree in the present study using data from cyclic triaxial test and cyclic direct shear test. Using 346 data points, divided in 50% train to 50%test ratio, sufficiently accurate models were generated through the algorithms considered. These algorithms were compared by means of the Root Mean Square Error (RMSE), Coefficient of correlation (R2) and Maximum absolute Error in prediction (MAE). An equation connecting the CRR with other input parameters was developed using the MGGP algorithm, which also showed the maximum R2 value of 0.96 for the test data. The AI algorithms were observed to satisfactorily model the relation between the input parameters and the CRR without any prior knowledge of the same.
Study of fin shape on the behaviour of finned piles under combined loading conditions
Authors: Ambi Rekha , Jayasree P K , Unnikrishnan N 
Published: July 2020

Abstract
Several types of structures, such as bridge abutments, retaining walls, transmission line towers and other structures exposed to wind and earthquake loads, supported by pile foundation are being subjected to large lateral loads. Finned pile is an emerging form of pile foundation that is capable of resisting large lateral displacements. Here, it is attempted to assess the effect of the shape of fins on the lateral carrying capacity of a pile with fins subjected to combined loading conditions. Small-scale laboratory model tests were performed on normal piles (without fins) and also with finned piles. These piles were embedded in sand. The studies were carried out by varying the geometric factors such as length, width and shape of the fins. Results show that there is a substantial increase in lateral resistance capacity of the piles after fitting the fins close to the pile head. The increase in lateral resistance capacity gained by placing fins on a pile varies with dimension of the fins. On the basis of the laboratory model test results, optimum dimension of the fin for maximum improvement are recommended for combined loading conditions. The trend showed in the results were comparable with those reported in the literature as on studies with lateral load alone.
Performance evaluation of Indian air routes
Authors: Thomas N , Handuja V , Iyer K C 
Published: July 2020

Abstract
India is witnessing a massive growth in the aviation industry. In 2016, the Government of India had launched Regional Connectivity Scheme (RCS), also known as UDAN (Ude Desh ka Aam Naagrik) which translates as ‘let the common citizen of the country fly’. It aims to make flying affordable for the masses, promote tourism, increase employment opportunities and promote balanced regional economic growth. The scheme incentivises the airlines to fly in non-financially viable regional routes. This study employs data envelopment analysis (DEA) approach to evaluate the performance of 33 domestic air routes of India after UDAN has launched. The parameters for evaluation of the efficiency have been established using the literature survey and pilot studies. Four input variables (air distance between airports, VGF (Viability Gap Funding) sought, maximum airfare, the capacity of routes) and one output variable (load factor) are selected for the analysis. The results of DEA model demonstrate that eight routes are relatively efficient operationally. This performance analysis can be used to assess the management actions and strategies in developing more effective decision making for satisfying the objectives of the owners or operators of airports.
Sand Free Rate Enhancement with Aqueous-based Selfhealing System
Authors: Li Jianda , Zhang Guicai , Ge Jijiang , Qiao Wenli , Jiang Ping , Pei Haihua 
Published: July 2020

Abstract
Unconsolidated sandstone reservoirs are susceptible to sanding problems. Traditional sand consolidation methods are often not environmental-friendly or ineffectively. This paper proposed a new sand consolidation treatment with aqueous-based self-healing system (ABSH) to maximize the sand free rate. The ABSH performs well with a relative lower dosage in laboratory tests. Sand consolidation performance and chemical resistance property were evaluated using the maximized sand free rate as indicators. After aging for 12 hours, the maximized sand free rate of consolidated sand pack could be prominently increased to 6600mL/h. Re-agglomeration ability between sand particles was illuminated by adhesion force tests. The adhesion force could be almost 90% of the original one after the contacting and separating process proceeded for three times.
Application of Pipeline System Stress Analysis in Inspection
Authors: Pu Zhe , Ren Bin , Tang Xiaoying , Wang Jifeng 
Published: July 2020

Abstract
Industrial pipeline is generally laid overhead along the pipe gallery. When the pipeline changes from cold state to heat state, the pipeline will have thermal expansion, which will generate thermal displacement and thermal stress. As a kind of heat medium, Steam has been widely used in industrial production. The pipeline has been in service at high temperature for a long time, which is prone to metal material degradation such as graphitization and spheroidization. The accidents of steam pipeline occurred frequently in recent years, so we must pay more attention to the safety of steam pipeline. The traditional inspection method adopts a random sampling model which has the risk of over inspection and missing inspection. This paper introduced the stress analysis of a steam pipeline based on ASME B31.3. Through the software, the model of the pipeline was established. According to the calculation results, a targeted inspection scheme was established and the inspection was more economical and effective
Microwave-assisted Acid-catalyzed Hydrolysis of Hemicelluloses in Rice Husk into Xylose
Authors: Zhang Mingyu , Wang Ya , Hui K. S. , Liu Lizhu , Zhang Chunqi 
Published: July 2020

Abstract
The development of an environmentally benign process for the hydrolysis of hemicelluloses into xylose could be one of the key technologies for making full use of biomass in the future. This paper studies dilute acid hydrolysis of hemicelluloses in rice husk (RH) into xylose using microwave radiation. Fourier transform infrared-attenuated total reflection spectroscopy was employed to quantitatively analyze xylose. The influences of hydrolysis parameters such as temperature, time, acid concentration, and ratio of RH to sulfuric acid on the yield of xylose in acid hydrolysis of RH were also investigated. The optimum hydrolysis conditions of hemicelluloses in RH to xylose are as follows: 4 wt% of H2SO4 concentration, 150 °C hydrolysis temperature, 25 min reaction time, and 1:7 ratio of RH (g) to H2SO4 (mL). Under optimum hydrolysis conditions, a yield of 32.96% xylose is obtained.
Investigation on Tribology Behaviors of Oil-soluble Nano-Cu Lubricating Additive for Aluminum Alloy ZL101
Authors: Wang Yonggang , Li Na , Liu Hui , Wang Junge , Huang Jialei 
Published: July 2020

Abstract
Oil-soluble Nano-Cu lubricating additive was prepared and its tribology behaviors as lubricant additive in SJ 15W/40 heavy duty gear oil used for aluminum alloy material ZL101 were investigated on an end-face friction and wear tester apparatus. SEM and EDS techniques were used to characterize the morphology, compositions and chemical states of the worn surface. The results indicate that the oil-soluble Nano-Cu additive have excellent friction-reducing properties and 0.6wt.% addition exhibited the best friction behavior. An appropriate applied load and rotating speed can improve the tribology properties obviously. The combination of SEM-EDS analysis reveals that by addition of Cu nanoparticles, a tribo-film containing Cu nanoparticles was formed and helped improving the wear and friction properties. The results demonstrate that Cu nanoparticles are potential friction modifier when used in ZL101.
Exergy destruction calculation and analysis for a Coal drying system
Authors: Jing Xuye , Shi Zhansheng , Ma Zhian , Peng Li , Dong Fang , Xu Bo 
Published: July 2020

Abstract
A coal drying system was modelled and the calculation methodology was developed to calculate the system. Then the system performance was obtained and the exergy destruction and loss in the system is 70.5 kW. The reasons of exergy destruction were tried to be explained from the perspective of energy grade. In DRY-REAC, the wet coal was dried to dry coal, the process of which is irreversible, and the main exergy destructions are used to pay the thermodynamic penalty of the increased energy grade of the wet coal.
Research advances on driving mechanism of nitrogen and phosphorus loss in sloping fields
Authors: Gong Xinfeng , Qin Tianling , Wang Huiliang , Nie Hanjiang 
Published: July 2020

Abstract
Slope runoff and its associated soil nutrient loss are affected by precipitation, topography, underlying surface conditions and soil physical and chemical properties. The loss of nitrogen and phosphorus in slopes is an important cause of soil quality degradation and eutrophication of water bodies. Therefore, based on the study of rainfall runoff, the loss of soil nutrients and the change of runoff quality in the process of runoff can be further analyzed, which can provide reference for controlling nutrient loss and revealing the mechanism of nutrient loss. In this paper, the current situation of the study on the loss of nitrogen and phosphorus in sloping fields at home and abroad is analyzed from five aspects of precipitation, topography, soil characteristics, vegetation and human activities. The possible research directions in the future are put forward from three aspects of precipitation characteristics, topography and vegetation conditions, so as to provide ideas for more systematic study on the loss mechanism of nitrogen and phosphorus in sloping fields.
Identification method of water-flooded layer based on analytic hierarchy process——Taking the Keshang Formation reservoir in the J188 well area as an example
Authors: Liu Wengfeng , Zhang Xuyang , Wang Kang , Yang Yufeng , Liu Xin , Zeng Shuling , Chen Jing 
Published: July 2020

Abstract
Most oil fields in China have entered the high water cut stage, the identification of water flooded layers is a very important task. At present, the identification of water-flooded layers usually adopts the combination of qualitative method and quantitative method to carry out the work. However, the qualitative method is difficult to be characterized by quantitative numerical values, so the work efficiency is very low; the quantitative method needs to be taken in the actual operation. The oil-water relative permeability of the reservoir, the viscosity of the oil and water, and the original oil saturation, the calculation accuracy of these parameters are inevitably large errors. This paper explores a semi-quantitative method to overcome the insufficiency of qualitative methods, the simplification of quantitative parameters, and the error of water-flooded layer identification. The analytic hierarchy process was used to identify the water-flooded layer in the Keshang Formation reservoir in the 188 well area. The water production rate, oil saturation, production index and relative permeability index were integrated into a comprehensive water-flooded layer identification index. The results show that the total water-flooded layer identification coincidence rate reaches 70%. The method of water flooded layer identification based on analytic hierarchy process is feasible.
Monitoring and analysis of external deformation of face rock-fill dam during initial storage period
Authors: Li Xiuwen , Wu Hao , Tian Dongcheng , Zhang Shunfu 
Published: July 2020

Abstract
During the initial storage period of the face rock-fill dam, its physical and mechanical properties will not be in a fully controlled state when it is subjected to the test of water loads, which may cause certain safety risks. The stability of the dam body and slope can be analyzed by studying the external deformation changes of the face rock-fill dam after water storage. This article analyzes the external deformation monitoring data of the Hekou Village Reservoir’s face rock-fill dam during the initial storage period, and it reveals the general rule of the external deformation of the face rock-fill dam after water storage. The results also show that the dam is safe after storing water and have certain reference significance for other similar projects.
Short-term Effect of Intelsat-29e Explosion on GEO Environment
Authors: Yiwen Hu , Zhanyue Zhang , Hongqiang Sun , Kaixi Liu 
Published: July 2020

Abstract
Geosynchronous Orbit (GEO) space environment model of the orbital targets with a size above 10 cm was established according to the amended data and space density. The situation of satellite explosion on GEO is simulated, including the number of fragments generated by the explosion, the size distribution as well as the corresponding mass distribution of the fragments. Under the conditions of selecting fragments of different size for analyzing, the area to mass ratio, discrete velocity, and apogee-perigee distribution can be obtained. By simulating the collisions of targets in different size and mass, and the evolution of the space environment when different size thresholds are selected, the necessity of establishing the GEO space environment and evolution model with the threshold size of 10 cm is demonstrated. The feedback collision caused by the fragments generated by the GEO satellite explosion is simulated under the conditions of different collision probability thresholds. The results show that the explosion fragments would cause a high collision risk environment for other GEO orbital targets, and the risky circumstance would last for hours. The impact of explosive debris on the security of the future space environment is analyzed
Dewatering Design of a Foundation Pit
Authors: Xiao Ma , Peng Mu 
Published: July 2020

Abstract
Foundation pit dewatering project is one of the important guarantee measures for the smooth construction of building foundation under the groundwater level. Through hydrogeological investigation and precipitation test, to find out the hydrogeological conditions of the site and obtain accurate hydrogeological parameters is the basis of determining the best precipitation scheme which is safe, reliable, economic and reasonable. Taking the dewatering design of a foundation pit as an example, the analysis and summary are made.
Analysis of ultimate bearing capacity of pressure spherical shell with openings
Authors: Wei Yan , Jianting Guo , Yong Shen 
Published: July 2020

Abstract
As the main pressure bearing structure of the deep submerger, it is inevitable to open manholes and observation holes on the pressure spherical shell, and the openings will affect the ultimate bearing capacity of the pressure spherical shell. In this paper, 7000m pressure spherical shell is taken as the research object, the finite element model of the spherical shell is established based on ANSYS, and the influence of the opening size on the ultimate bearing capacity of the spherical shell is calculated. At the same time, the trunk bulkhead strengthening method is adopted, and the thickness and height are taken as variables to calculate the change of the ultimate bearing capacity under different working conditions. The results show that the wall strengthening can significantly reduce the influence of opening on the pressure spherical shell, and the appropriate increase of thickness or decrease of height can increase the ultimate bearing capacity of the structure.
Study on spatiotemporal difference and influencing factors of grassland yield in sunan county of Gansu province
Authors: Yan Jixuan , guangping Qi , Sun Dongyuan , Zheng Zhiqin , qiang qiao Hong , guang Li 
Published: July 2020

Abstract
Grassland ecosystem is the most important terrestrial ecosystem. Only by accurately estimating grassland yield and productivity can we effectively protect the ecosystem. This thesis is based on 323 monitoring data and MODIS-NDVI and MODIS-EVI vegetation index corresponding to the same period from 2012 to 2016, Based on the establishment of grassland yield estimation model, the grassland yield of Sunan County was estimated. The results show that: (1) After validating the model equations corresponding to the five production areas through the reserved precision verifying points, the model accuracy is higher than 90%, and it is feasible to estimate production by remote sensing.(2) From 2012 to 2016, the average yield of grass in Sunan County was 89.92 million tons, and the average yield per unit area was 524.12 kg/h m2.(3) Grass yield in Sunan County decreased from southeast to northwest during 2012-2016, and the overall grass yield showed a slow downward trend.(4) The annual grass yield in the study area is directly proportional to the annual precipitation and average annual temperature, and the annual precipitation has a greater impact on the annual grass yield.
Numerical study on the evolution of cloud microphysical characteristics during rainfall processes of typhoon Bolaven in 2012
Authors: Zhang Zhiwei , Li Sicong , Li Yunying 
Published: July 2020

Abstract
The cloud microphysical characteristics in a rainfall process of typhoon Bolaven is studied by the WRF model. The results indicate that the maximum values of different cloud microphysical parameters occur at different times, strong ascending motions have an important impact on the evolution of cloud microphysics. More than four hours before the peak of rainfall, ascending motions are strongest and occur primarily above the 0°C layer, water vapor is lifted to the upper troposphere and frozen. With increasing rainfall, the core of the strong ascending motion decreases. When the core of the strong ascending motion decreases below the 0°C layer, the amounts of both rainwater and cloud water increase rapidly and reach their maximums at and after the peak, respectively. The vertically integrated cloud water content maintains its maximum for approximately three hours in torrential rain, and cloud water is continuously collected by rainwater.
Prediction of subsidence deformation of subway project by improved markov chain and optimized wavelet neural network model
Authors: Lijuan Luo 
Published: July 2020

Abstract
In view of the fact that the factors affecting the subsidence deformation of subway engineering are complex and the subsidence monitoring data are random, this paper constructs an optimized wavelet neural network model with markov chain improvement to improve the accuracy of the predicted data. Firstly, the wavelet neural network is optimized by adding momentum and adjusting learning rate adaptively. Finally, based on markov chain theory, the residual between the predicted value and the actual monitoring value of the optimized wavelet neural network is improved. Taking the settlement data of a settlement monitoring point of xi'an metro line 14 as the research object, the prediction accuracy of the model was compared and analyzed by C++ program. The results of the program show that the additional momentum and the adaptive learning rate are effective for the optimization of the wavelet neural network model, and the prediction accuracy of the optimized wavelet neural network model improved by the markov chain is higher than that of the single model, which is suitable for the prediction of the subway engineering settlement.
Mutual grafting affects the physiology of two Solanum photeinocarpum ecotypes under selenium stress
Authors: Liao Renyan , Fan Zhengkang , Peng Huaiqing , Huang Kewen 
Published: July 2020

AbstractThe aim of this pot experiment was to determine the grafting affecting the physiology of twoSolanum photeinocarpumecotypes under selenium (Se) stress. TwoS. photeinocarpumecotypes (farmland and mining) were subjected to mutual grafting, and then their physiological characteristics were determined after growth in soil containing Se at 10 mg kg−1. Compared with ungraftedS. photeinocarpum, the combination of the scion (farmland ecotype) and the rootstock (mining ecotype) showed increased photosynthetic pigment contents, while the opposite grafting combination showed decreased photosynthetic pigment contents. Mutual grafting also increased the antioxidant enzyme activity graftedS. photeinocarpum, and these parameters showed the highest values in the combination of the scion (farmland ecotype) and the rootstock (mining ecotype).
A Study on Development Abilityof Fishery Economy in China Based on Factor Analysis
Authors: Yu Lei , Xu Zhicang 
Published: July 2020

Abstract
The thesis adopts the factor analysis method, taking 11 indicators reflecting the fishery economic development capacity as the research object, and measures the output capacity, input capacity and comprehensive development capacity of China’s fishery economy from 2009 to 2018. The results show that the input capacity of the fishery economy is significantly higher than the output capacity of the fishery economy; the pulling effect of the input capacity of the fishery economy on the output capacity of the fishery economy varies from strong to weak; the speed gradually slowed down.
Process of Soil Erosion Study Method
Authors: Zheng Yanshuang , Lin Jing , Li Binbin , Liu Jie , Liu Mingxin 
Published: July 2020

Abstract
The study methods of soil erosion and main soil erosion prediction model are introduced in this paper. The soil erosion study methods include the erosion features survey procedure, test plot long-term monitoring, rainfall simulation experiment in laboratory, agrology method, river gauging, remote sensing method, nuclide traces method, soil erosion prediction model method et al. The soil erosion prediction model includes the USLE and RUSLE, CSLE, WEPP, YWYM et al. We introduced the relative merits about these soil erosion study methods and soil erosion prediction model in this paper.
Strategic Sustainability Plan In Denpasar 2040
Authors: Liu Yuchen , Tao Hongyi 
Published: July 2020

Abstract
By 2040, Denpasar will become a vital international city. There are traditions flourishing and unique cultural history alongside sustainability innovations, modern technology, and empowered communities. Its core is that Denpasar embraces traditional philosophy, harmony with God, people and the environment. This report discusses various strategies for making Denpasar a sustainable city in 2040. The region’s natural resources are managed fairly and sustainably to enhance social cohesion and improve resistance to environmental risks. The city will reduce waste through a variety of economic, extensive reuse and waste recycling projects and support a wide range of industries and opportunities for the Denpasar people. Tourism will continue to promote employment and the economy without compromising related ecosystems and biodiversity. Denpasar will not only thrive, but will also be sustainable.
Research Progress of Remedying the Heavy Metal Contaminated Soils with Rape
Authors: Ma Lin , Zhao Yutong 
Published: July 2020

Abstract
The problem of heavy metal pollution in soil is becoming more and more serious, which seriously threatens the ecosystem and human safety. In recent years, there have been more and more studies on the use of plants to remediate heavy metal contaminated soil. The toxicity of rapeseed and the detoxification mechanism of rapeseed to heavy metals, the enhancement method of rapeseed in the remediation of heavy metal pollution in soil, and the research prospect of remediation of heavy metal contaminated soil by rapeseed.