bluuebunny/crossref_metadata_2025_split huggingface dataset:
Performance of controlled low strength material made using industrial by-products
Authors: Kumar Singh Vinay , Kumar Das Sarat 
Published: July 2020

Abstract
Controlled low strength materials (CLSM) are the materials which are flowable and self-compacting in nature. These materials are used in various civil engineering applications such as backfill in trenches abutments and retaining walls; void fills in abandoned structures and cavities, conduit bedding, and many more. The strength of these materials is less than 8.3 MPa. CLSM is generally made of Portland cement, fine aggregate, fly ash, and water. Many researchers have studied the performance of CLSM using different industrial by-products such as quarry dust, foundry dust, shredded rubber tire, and many others. In this study, various mix proportion made up of red mud, crusher dust, fly ash, and Portland cement is used to study the engineering properties of CLSM. Considering flow value as one of the important parameters of CLSM, firstly, the amount of water content required for the desired flow value (0.15-0.3 m) was determined. After finding the water contents, each mix proportion was tested for other engineering properties such as unconfined compressive strength, bleeding, density, and durability. The results primarily show that these geomaterials can be used as a CLSM material with further study of its environmental impact on the surrounding soil.
Fracture properties of OPC included ambient cured geopolymer concrete by size effect method
Authors: Sabu N J , Thomas Job 
Published: July 2020

Abstract
This paper presents the details of experimental study on the fracture properties of high strength geopolymer concrete. The geopolymer concrete prepared in this study was cured in ambient temperature. This was achieved by adding small amount of OPC in the mixture. A total of 42 notched beam specimens with varying span to depth ratio (l/d) between 8 and 6 and notch depth to total depth ratio (a0/d) between 0.2 and 0.4 was cast. All beam specimens were tested under three point bending test. The fracture properties, namely, fracture energy (Gf), critical stress intensity factor (KIc), process zone length (cf), and crack tip opening displacement corresponding to peak load (δc) were determined by size effect law (SEL). The results show that the fracture properties of ambient cured geopolymer concrete are comparable with that of ordinary concrete of same strength.
A study on compatibility of superplasticizers with high strength blended cement paste
Authors: Ajay Athira , Ramaswamy K P , Nazeer M 
Published: July 2020

Abstract
Adoption of High-Performance Concrete (HPC) made with low water to binder ratios in practical applications are being encouraged widely for enhanced development of high early strength and durability. The type of superplasticizers incorporated, highly influences the development of HPC. At low water-cement ratio, HPC is made workable by the incorporation of superplasticizers. The wrong proportion of cement and admixture in a mix causes low fluidity, rapid/delayed setting, segregation, bleeding etc. Therefore, it is important to underline the interaction mechanism between cement and superplasticizer for the better utilization of concrete. As more blended cements are used now a day, it is imperative to investigate the compatibility of superplasticizers in such paste systems. In this study, the saturation dosages and compatibility of sulphonated naphthalene formaldehyde (SNF) and poly carboxylate ether (PCE) superplasticizers with cement paste prepared from Ordinary Portland Cement (OPC) 53 grade, Portland Pozzolana Cement (PPC) and Slag cement (PSC) for different water-binder (w/b) ratios are analysed using the marsh cone test and mini slump test. As per the result obtained, PSC was found to have higher saturation dosages than OPC and PPC. The optimum dosages for PCE admixture are lower than that for SNF as their mechanism of action are different.
A review of isotache modeling and secondary consolidation behavior of soft clays
Authors: Azad Sahib Amal , Robinson R G 
Published: July 2020

Abstract
Secondary consolidation of soils has gained much importance as a major contributor in the long term settlements of soft clays. In the scenario where constructions on such problematic soils are increasing, accurate prediction of long term settlements is very challenging. This paper reviews the evolution of the secondary compression characteristics from the concept of Cα to the creep isotaches. The generation of the 3 D elastic viscoplastic model from the equivalent time (isotache) approach is also discussed in this paper. This model is an extension of Maxwell’s rheological model. With relevance to Indian soils, the secondary compression characteristics of Kuttanad and Cochin marine clay are also reported in this paper.
Identification of different vehicle-following manoeuvres for heterogeneous weak-lane disciplined traffic condition from vehicle trajectory data
Authors: Madhu Kavitha , Sivanandan R , Srinivasan Karthik K 
Published: July 2020

Abstract
Indian traffic can be considered as mixed and heterogeneous due to the presence of various types of vehicles that operate with weak lane discipline. Consequently, vehicles can position themselves anywhere in the traffic stream depending on availability of gaps. The choice of lateral positioning is an important component in representing and characterising mixed traffic. The present study aims to develop a methodology to extract the trajectory of vehicle for heterogeneous non-lane based traffic condition. To study the movement pattern of vehicle types and to explore the vehicular behaviour and its reaction to different traffic environment, it is essential to extract the trajectory data of vehicles. Therefore, a semi-automated tool using python’s graphical user interface is developed to extract the vehicle trajectory. The field data provides evidence that the trajectory of vehicles in Indian urban roads have significantly varying longitudinal and lateral components and the traffic flow characteristics of each vehicle types vary from one another. Present study analysis the variation in driving behaviour of vehicle with lateral position characteristics. It has been found that the following behaviour of vehicles varies with the lane position and the traffic parameters of each lane differ from each other.
New advances in catalysts for C9 petroleum resin hydrogenation
Authors: Yu Chong , Huang Hui , Li Qianwen , Xu Ruoyi , Tao Shiying , Xiao Xunwen , Luo YunJie , Fang Jianghua 
Published: July 2020

AbstractC9 petroleum resin is a thermoplastic polymer produced by polymerization of C9 fraction obtaining from the steam cracking unit, and could be catalytic hydrogenated to remove the ethylenic C=C bond, aromatic ring with improved physical properties. The research progress in the efficiency supported nickel or/and palladium catalysts for C9 petroleum resin hydrogenation was illustrated and reviewed, further development was discussed.
Dynamic Analytics of International Port Governance Structure Efficiency: With Comparative Verification Cases of Port Governance in Pearl River Delta
Authors: Fu Ping-ting , Wang Ke , Lee Kun-Fa , Mai Jia-ming , Liu John J 
Published: July 2020

Abstract
The current multi-lateralization of international trade is facing a critical challenge of dynamic assessing and analyzing port governance structural efficiency, especially in the exploration of effective governance structure and analytics method of inter-nation, heterosystem port regions, such as those along “The Belt and Road” regions. In this context, this paper based on Nobel prize-winning economist Williamson - corporate governance structure theory and founded the dedicated degree of "asset" idea, built suitable for state-owned companies - private hybrid system "assets dedicated degree" of the econometric model, and to a large bay area of Guangdong port governance "transaction costs" of the empirical analysis. This study collects relevant data of key ports in the Asia-pacific region and uses them to scientifically test the measurement model and analysis method we built, empirically determines the main measurement dimensions of "port asset specificity", with the measurement degree reaching over 70%. Finally taking Zhuhai port as the key empirical analysis, this paper puts forward the strategy of Zhuhai port: Firstly, based on the state-owned enterprises - private hybrid system of Shenzhen port, Zhuhai port needs to introduce global strategic partners for in- depth cooperation and innovation. Secondly, Zhuhai port should constantly improve the proportion of container business and give full play to the unique advantages of multi-model transport, reducing "port asset specify". Thirdly, Zhuhai port should complementary interaction with other ports in The Greater Bay Area.
The design of multi-energy market trading systems considers the wholesale and retail markets
Authors: Chen Yonghua , Sun Yong , Li Baoju , Yang Dongmei , Liu Dunnan 
Published: July 2020

Abstract
With the development of energy internet construction, the transactions of multi-energy sources in the energy trading market are getting closer and closer. In a single energy market transaction, each energy market only considers the transaction situation of this market, which brings potential losses to energy efficiency. It is urgent to study a market trading system of multi-energy coupling. First of all, this article sorts out the current status of the transaction development of domestic and foreign natural gas, electricity and heat markets. Then, it looks forward to the market trading model of multi-energy sources. Finally, we propose a multi-energy trading system considering the wholesale and retail markets. The energy trading system constructed in this paper can provide a direction for the development of a variety of energy trading in China.
Research and field test of the integrated pipe string of separate layer production and injection
Authors: Shifeng Hu , Xudong Wang , haichao Yang , Xubo Gai , Xueming Lai , Yang Liu , Zuchang Song 
Published: July 2020

Abstract
Imbibition oil recovery is an effective technology for tight reservoir development, the working mode of the well needs to be switched between production and injection, when using imbibition oil recovery. It will leads to some disadvantage of imbibition oil recovery, such as long operation time and high development cost. Therefore, a novel integrated technology of separate layer production and injection has been proposed, which is based on the hydraulic feedback pump and bridge concentric zonal water injection technology. When switching the working mode of the well, it is only necessary to trip in or out the plunger into the cylinder of pump. Until recently, this technology had been applied in 3 wells for field test, 2 injection wells and 1 production well. The test results show that this technology can realize switching the working mode of the well without replacing the pipe string. Besides, it also can meet the requirements of tripping in/out the plunger ϕ50.8mm) or the measuring instrument ϕ42mm). The successful field test of the separate layer production and injection integrated pipe string is very important for changing development method of low-permeability reservoirs from conventional waterflooding to imbibition oil recovery. By using this integrated technology, low permeability reservoirs can be developed economically and effectively.
Technology and Application Effect of 2DVSP and Surface Seismic Joint Exploration in Shale Gas
Authors: Qin Li , Zhang Xiaobing , Yong Jie , Li Jinyi , Luo Kun 
Published: July 2020

Abstract
2DVSP and surface seismic joint exploration technology is a seismic exploration method formed by the combination of surface seismic exploration and in-well VSP logging technology. It realizes the combination of surface seismic and in-well VSP logging. Through simultaneous acquisition and processing, the advantages of these two technologies can be brought into play. This method can improve the interpretation accuracy of seismic profile and provide the basis for the implementation of the structure and reservoir characteristics. The method has been applied to demonstrate the trajectory of shale gas directly into horizontal well and good geological results have been obtained.
A total least squares solution to a 3D coordinate transformation parameters of large Euler angles with closure constrain
Authors: Qin Jian , Guo Jinyun , Xu Xiaofei 
Published: July 2020

Abstract
A new method for calculating three-dimensional (3D) coordinate transformation parameters of large Euler angles with closure constrain is presented. This method obtains the initial value by traditional seven-parameter model. Then we derive the closure constraint condition and linearize it. The constrained total least-squares (CTLS) approach is adopted to obtain corrected values under the closure constraint condition. A practical case study is presented to illustrate the effectiveness of this new model.
The Nonlinear Scattering Characteristics of Sound Waves by a Bubble
Authors: Teng Yuehui , Liu Jue , Zhang Junqing , Wu Yong 
Published: July 2020

Abstract
The scattering characteristics of sound waves by bubbles have been widely applied to ship tracking, wake-homing torpedo and reverberation suppression. To explore the nonlinear scattering characteristics of sound waves by bubbles, the Keller-Miksis equation of bubble vibration was adopted and a numerical solution to the nonlinear equation is presented. Then, the characteristics of nonlinear scattering, including the intensity of the scattered waves, the frequency and radius selection under pulse excitation and the scattered wave duration, are studied. The nonlinear scattered waves by a bubble are too small to be detected when the intensity of the excitation source is small. As the intensity of the excitation source increases, so does that of scattered harmonics by the bubble. If the intensity of the excitation source is further increased to a certain extent, the scattered waves by the bubble occurs dispersion phenomenon, emitting broadband noise. It may be the reason why a broadband noise will be produced by the cavitation of bubbles.
A Turning Contour Maintaining Method of Trajectory Data Compression
Authors: Feng Shihao , Chen Luo , Ma Mengyu , Yang Anran 
Published: July 2020

Abstract
As the dramatical improvement of Global Position System (GPS) sensors in recent years, the research of trajectory dataset has become a hotspot in the field of geographic information systems (GIS). Pretreatment is very important for extracting useful information from massive trajectory dataset. One of key problems is trajectory data compression. Aiming at preserving crucial feature of trajectories while compressing, this paper puts forward a method for compressing trajectory data that combines distance, angle, and velocity while maintaining the contour of the trajectory, especially the turning corners and U-turns in the compressed trajectory and the original trajectory. So, the compressed trajectory can be very useful for trajectory mining and road network update. The new method also shows applicability and stability through experiments on different datasets.
Lidar observations of aerosol enhancement in the upper troposphere and lower stratosphere
Authors: Ma Xian , Tu Houwang , Wang Yongxian 
Published: July 2020

Abstract
The upper troposphere and the lower stratosphere (UTLS) are the transition areas between the troposphere and stratosphere. Water vapor, cirrus clouds and aerosols in this area have a strong modulation effect on solar short-wave radiation and earth long-wave radiation. Changes in the content and distribution of aerosols in this level will have a radiant forcing impact on the climate. This article uses the observation data of MPL lidar (micropulse lidar) at SACOL station (Semi-arid Climate and Environment Observation Station of Lanzhou University, 34.946°N, 104.93°E) and ERA-Interim reanalysis data from June to December 2011 to study the changes of stratospheric aerosol over SACOL station after Nabro volcano eruption on June 12, 2011. The result indicates that after the Nabro volcanic eruption, there is an aerosol layer with significantly enhanced scattering ratio over the SACOL station, and the depolarization ratio of particles in the aerosol layer is relatively small, mainly spherical particles; by analyzing the backward trajectory of the stronger aerosol layer, it can be determined that the special aerosol layer was caused by the Nabro volcanic eruption.
Remote sensing image-based wildfire recognition using capsnet for transmission lines
Authors: Zhao Xianping , Gao Zhenyu , Wen Gang 
Published: July 2020

Abstract
Transmission lines are the lifeblood of power grid operation and the lifeline of people's livelihood. Recently, large-scale overhead transmission lines frequently trip due to wildfire, leading to serious threat to security and stability of the power grid and the public’s normal use of electricity. With the application of satellite remote sensing image in the electric power sector, it becomes a reality that using remote sensing image to detect wildfire. Aiming at the characteristics of wildfires that are easily misdetected and missed, this paper proposes a remote sensing image-based wildfire recognition model based on capsule network (capsnet). The proposed architecture is evaluated on remote sensing image datasets from the Himawari- 8 meteorological satellite. The proposed method has been shown to be effective in detecting wildfire in experiments, which is useful for the improvement of resist ability of wildfire for transmission lines.
Mutual grafting affects the selenium uptake of two Solanum photeinocarpum ecotypes
Authors: Liao Renyan , Yang Zhiwei , Pang Jiayan , Huang Kewen 
Published: July 2020

AbstractThe aim of this pot experiment was to determine the grafting affecting the selenium (Se) absorption of twoSolanum photeinocarpumecotypes. TwoS. photeinocarpumecotypes (farmland and mining) were subjected to mutual grafting, and then their Se accumulation 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 root biomass, while the opposite grafting combination showed decreased whole shoot biomass. Mutual grafting also increased the Se content in graftedS. photeinocarpum, and the combination of the scion (farmland ecotype) and the rootstock (mining ecotype) showed the highest values. The e scion (farmland ecotype) and the rootstock (mining ecotype) combination showed increased Se absorption and transportation, but the largest amount of extracted Se was in whole shoots of the ungrafted farmland ecotype. Thus, the ungraftedS. photeinocarpumfarmland ecotype had the best nutritional value in terms of Se content.
Research on the Temporal and Spatial Evolution and Driving Factors of Green Total Factor Productivity in the Construction Industry ——Empirical analysis based on the Yangtze River Economic Belt from 2008 to 2017
Authors: Chen Yajun 
Published: July 2020

Abstract
Promoting the green development of the construction industry is an important measure for China to implement a sustainable strategy. This study is based on the SBM model that considers undesired output, measures the green total factor productivity of the construction industry in 11 provincial administrative regions of the Yangtze River Economic Belt from 2008 to 2017, and further establishes a geographic detector model to explore the driving factors of evolution. The study found that: consider the green total factor productivity of undesired output is always lower than the total factor productivity of which unexpected output is not considered. Among them, the green total factor productivity of the construction industry in Shanghai, Zhejiang and Jiangsu is always 1; the level of economic development is always the driving force during the study period. The key factors in the change of green total factor productivity in the construction industry are not independent of each other. Finally, according to the research results, relevant suggestions for improvement are put forward.
Influence of Wind Direction on Fire Spread on the Exposed XPS insulation Wall
Authors: Zheng Lanfang , Zhou Liang , Jia Xiangtao , Li Xiaokang 
Published: July 2020

Abstract
Medium-sized wall fire experiments were carried out using extruded polystyrene (XPS) panels to build an insulation layer to simulate the flame spread over the exterior thermal insulation system during the exposed stage. During the experiments, the influences of the wind direction on the lateral and vertical flame spread speed without fire barrier designs under the wind speed of 2.5m/s were studied quantitatively and qualitatively. According to the experimental results, it is found out the averaged peak lateral flame spread rate increases and the averaged peak vertical flame spread rate decreases when the angle between the wind direction and the wall increases from 0° to 60°. It can be seen from the analysis that the largest average lateral flame spread rate and the largest average vertical flame spread rate also show regular changes at same wind direction. This study results can provide valuable references for optimizing the fire safety design of exterior insulation system.
The situation and research progress of agricultural non-point source pollution in China
Authors: Chuan Limin , Zheng Huaiguo , Wang Ailing , Zhao Jingjuan , Yan Zhihui 
Published: July 2020

Abstract
Agricultural non-point source pollution has become an important factor affecting the quality of water environment, and it is also one of the major environmental problems facing in china. This paper analyzed the current situation of agricultural non-point source pollution, summarized the existing research progress and put forward the development trend and tasks in the field of agricultural non-point source pollution in the future, so as to provide reference for government management and researchers in related fields.
Analysis of Silt Dam System Grade and Joint Regulation in Typical Small Watershed of Loess Plateau
Authors: Sun Weiying , Zhang Pan 
Published: July 2020

Abstract
When a silt dam system is formed, its function of flood detention and erosion reduction is not simply superimposed. The transport and transfer process of sediment between the dams system presents a nonlinear relationship, which we call the grade regulation function of the dam system. In order to study the mechanism of joint action and regulation of flood storage and sediment retention in silt dam systems in small watersheds, the Yulingou small watershed silt dam system in the first sub-region of the hilly and gully region of the Loess Plateau was taken as the research area. Based on the systematic analysis of different dam levels and different grading ways (series, parallel and mixed), the silt retention and sediment retention effect of silt dams in small watershed of the Loess Plateau is analysed. The spatial distribution model reveals the control relationship between the dam system and channel unit dam on the flood and cement sand in different layers, and clarifies the grade effect of the flood and sediment storage capacity of the small watershed. The results show that the reasonable arrangement of silt dam system in small watershed can effectively extend the service life of main dam, the reasonable arrangement of different types of dam system can extend the service life to different degrees, and the joint application of cascade dam system can realize the internal digestion of flood and sediment.