bluuebunny/crossref_metadata_2025_split huggingface dataset:
Research on Development Strategy of Agriculture and Forestry Economy in Transition Period
Authors: Sun Wenbo , Liu Yingjie 
Published: November 2020

Abstract
in recent years, with the continuous development of social economy, China’s society is in an important transition period of development. Rural economic development has always been a matter of great importance to the state, and rural financial development is the key factor of rural economic development, providing a reliable guarantee for the overall development of rural economy. Therefore, it is of great practical significance for the current development of rural areas in China to comprehensively and accurately grasp the development of rural finance in the transition period and the problems that arise, and actively seek the development direction of rural finance in the transition period.
Treatment of High Fluorine Surface Water by Crystal Seed Method
Authors: Luo Qijin , Lei Yutao , Chen Jianyu , Lin Fangmin , Li Jingshi , Yi Xingui , Liang Wenzhong 
Published: November 2020

Abstract
In view of the current defluorination process of surface water mainly concentrated on the treatment of reduce the concentration of fluoride to less than 10 mg/L, but less research on the treatment of reduce the concentration of fluoride less than 1.0 mg/L, the existing technology are complex process, and the cost is high. High concentration fluoride surface water was treated by crystal seed process which high-purity calcium fluophosphate and calcite as seed crystal. The best operation conditions for fluoride removal were confirmed through the single factor experiments and orthogonal test: adding seed crystal(Calcite: calcium fluophosphate is 1:4) of 8 g/L with Na3PO4 and CaCl2 to make molar ratio of the calcium ion, phosphate ion and fluorin ion be 12:6:1,the reaction time was 1 h, and the stirring rate was 200 r/min. High removal rate of fluorine ion and utilization rate of phosphate ion were also achieved during the reaction ( higher than 94% and 97%,respectively). This research proved that the crystal seed process could reduce the concentration of fluoride in surface water from 15 mg/L to less than 1mg/L which meets the standard of surface water environment quality.
Measurement of President Reputation of Farmers’ Specialized Cooperatives Based on Factor Analysis
Authors: Xu Jie 
Published: November 2020

Abstract
As the most important carrier to solve the contradiction between “small farmers” and “big markets”, cooperatives play an important role in the development of rural economy. As the soul of the cooperative, the president’s reputation is crucial to the development of the cooperative. On the basis of stakeholder theory and role theory, this paper constructs a measurement model with 35 indicators including 8 aspects: leader role, benefit spokesperson, team worker, ethical model, mobilization motivator, innovator, social contributor, relationship coordinator, etc. Through sorting out and analyzing the first-hand survey data of 39 farmers’ professional cooperatives in Sichuan Province, the three most important dimensions was obtained that affect the reputation of the president: leader role, ethical model and mobilization motivator. Finally, the targeted cultivation measures for the president’s reputation were put forward.
Replacement Construction Technology of Collapsible Loess Subgrade in Typical Subtropical Humid Climate Area
Authors: Zhao Hua , Pan Jingsheng , Hu Juan , Wang Yong 
Published: November 2020

Abstract
Aiming at the problem of insufficient bearing capacity of collapsible loess in highway subgrade engineering, taking the second phase of KKH project in Pakistan as an example, Based on the analysis of the physical and mechanical properties of collapsible loess in this area and the actual situation of the project, the most effective construction technology is explored. The construction technology of replacing natural gravel is analyzed, and summarizes the actual operation of the construction methods, to provide some theoretical basis and construction reference for related projects. The results show that the design and construction requirements can only be met under the condition of strict implementation of the norms and standards, combined with the actual situation of the project, and the most effective construction technology explored can be applied to the construction of highway subgrade.
Seismic Behavior of Connection of Steel Frames and Composite Wall Panels
Authors: Li Jiuyang , Li Daozheng , Li Fangqi 
Published: November 2020

Abstract
Steel frames and composite wall panels are usually connected by welding. In this paper, a flexible bolt connection method is designed, and the cross section of the original composite wall panel is optimized to form a new envelope structure system. The new envelope structure is analyzed as a whole using the finite element software ABAQUS. In order to compare the performance of the welding and the flexible bolt connections, an experimental study is carried out to investigate the bearing capacity and displacement of single bolt and two bolts flexible bolt connection and the welded connection. The seismic bearing capacity, ductility and energy consumption capacity of of the different envelope structures are analysed. The results of the theoretical analysis and experimental verification indicate that the flexible bolt connection is superior to the rigid welded connection in terms of bearing capacity, ductility, energy consumption and impact on the stiffness of the main structure. It is believed that such findings are of great value for further application of steel frame structure in practice.
Comparative Study on Low Temperature Germination Ability of Overwintering Green Manure
Authors: Wen Yanjie , Du Jin , Yu Shiguo , Zhao Fei , Li Zifang , Liu Jian , Cao Gaoyi , Xiang Chunyang 
Published: November 2020

Abstract
Green manure is a biological fertilizer source with complete nutrients, which provides reference for the selection of green manure resistant to low temperature germination. Six green manure crops including Brassica napus L., Orychophragmus violaceus (L.) O. E. Schulz, Medicago sativa L., Lolium perenne L., Melilotus officinalis (Linn.) Pall. and Vicia villosaRoth were selected as experimental materials to study the effects of low temperature stress on germination and seedling growth of different green manure through low temperature germination experiments. The results showed that there were significant differences in cold tolerance of the seeds of 6 medium green manure crops during germination. The germination potential, germination rate, germination index, vitality index, seedling height, root length, seedling fresh weight, soluble protein content and chlorophyll content of Brassica napus L. and Vicia villosaRoth seeds were all better than those of other green manure crops, which provided theoretical basis for the actual production of green manure.
Identification of Tolerance of Wheat (Triticum Aestivum L.) With Different Ploidy under Salt Stress
Authors: Xie Xiaojuan , Zhao Fei , Zheng Yuyuan , Sang Liran , Zhang Poyuan , Jiang JinJuan , Cao Gaoyi 
Published: November 2020

Abstract
In this study, different ploidy wheat were used as experimental materials to explore the effects of different concentrations of NaCl stress on (Triticum aestivum L.) of different wheat. The effects of varieties, germination period and seedling growth provide a theoretical basis for the cultivation of salt-tolerant wheat varieties. 3AA6, Chinese Spring and longdon were used as experimental materials to analyze the indexes of wheat germination energy, germination rate, root length and high salt tolerance of wheat under different concentrations of NaCl solution stress. With the increase of NaCl salt concentration, the germination energy, germination rate, plant height, root length, seedling and root fresh quality of the three wheat varieties decreased gradually. The effect of NaCl on the growth of wheat seedlings at germination stage was mainly to inhibit the growth of roots and buds, in which the growth rate of roots was inhibited most strongly by salt stress, followed by the growth rate of buds, and the inhibition on the number of roots was the least. There were significant differences among varieties and concentrations. According to the performance of the three experimental varieties, Chinese spring showed strong salt tolerance at seedling stage, longdon showed poor salt tolerance, and 3AA6 showed the worst salt tolerance at seedling stage.
Electric Vehicles Charging Management Based on Flexible Load Aggregation
Authors: Xu Ning , Xu Nan , Ling Yunpeng , Liu Qiang , Ma Hongyuan , Zhou Bo , Song Yan , Zhao Zihao 
Published: November 2020

Abstract
As the scale of electric vehicles grows year by year, disorderly charging of EVs brings great challenges to the safe operation of the power grid and charging management of EV charging service providers. The charging service providers play the role of EV aggregators and aggregate the flexible load of EVs through centralized scheduling strategy. Take profit of EV aggregators and variance of power grid as objectives. Based on the direct scheduling pattern, a multi-objective optimal scheduling model was established and solved by Genetic Algorithm (GA). The results show that under the centralized scheduling strategy of EV aggregators, the difference between peak and valley load of electric power system is reduced, the variance of the grid is lower, the benefits of the aggregator are increased and the EV charging costs are reduced.
The Application of the Power Grid Map Intelligent Recognition Technology in the Power Grid Early Warning System
Authors: Xu Ling , Jin Haochun , Wu Xin 
Published: November 2020

Abstract
As the power grid enterprises grow, the relationship between their power grid systems is becoming closer and closer. In the context of industrial development with the energy structure unbalanced, The operation of the power grid becomes more and more complicated, making the power grid system face the technical problems. In this context of technological development, power grid enterprises should follow the pace of the times and integrate intelligent technology into the technological innovation of the power grid to make the ability to predict the power grid fault come true in advance, and the grid map intelligent identification technology is the key technology to support the power grid enterprise to realize informatization and intellectualization. Because most of the original data of the power grid enterprise are stored in various kinds of power grid design drawings, the power grid intelligent identification technology can effectively visualize the data of such power grid drawings, and then realize the intellectualization which early warning technology means.
Analytic Estimation of Three-dimensional Variables for SOC in Iron Phosphate Lithium-ion Battery
Authors: Shao Yiyuan 
Published: November 2020

Abstract
A three-dimensional variable analysis method for the estimation of state of charge (SOC) in iron phosphate lithium-ion battery is proposed. The 100Ah/3.6V iron phosphate lithium-ion battery is regarded as the research object. The relationship between SOC and single factor was got by using the control variable method, and the specific expression was got by using the way of data fitting. Then the situation when multiple factors work together is analyzed, and the function between SOC and the three factors—temperature(T),charging voltage(U) and charging current(I) was got by using the way of data fitting. The feasibility of this method is tested with experimental data, and the error analysis has been done. The results indicate that the SOC estimation error of this method is less than 2%. The two-dimensional surface and contour curve is given when charging voltage(U) is 3.3V and under the condition of different charging current and temperature.
The Cloud Platform of Maintenance and Supervision of Intelligent Potted Plants Based on Arduino
Authors: Yi Yongchao , Shi Henghua 
Published: November 2020

Abstract
To study a simple and practical intelligent potted plant maintenance and supervision cloud platform. The Arduino main controller was used as the under computer to connect the input end of the sensors that collected the potted growth environment factor and the output end of the actuators that regulated the potted growth environment factor. The responsive website system designed and developed by Java is deployed on the cloud server as the upper computer, which can communicate with the lower computer anytime and anywhere, receive, analyze, process and store the data uploaded by the lower computer, and finally respond to the corresponding control instructions to the lower computer, so as to control the working state of the lower computer actuator and achieve the effect of intelligent regulation. When the air temperature collected by the lower machine exceeds the range of 20°C to 30°C, the cooling fan will automatically turn on. When the soil moisture is less than 50%RH to 70%RH, the irrigation pump will automatically irrigate; When the light intensity is greater than 5000LX, the fill light will automatically turn on. Moreover, through the upper computer system, the growth environment factors of potted plants can be observed in real time and manually controlled. This system can be easily supervised and maintained anytime and anywhere by simply deploying and debugging hardware.
Video Recommendation System in Internet Era
Authors: Ruan Zeqi , Chen Yibo , Shen Zhangguo 
Published: November 2020

Abstract
With the development of Internet technology, mining and analyzing a large number of network data has become a hot issue in the industry. Recommendation system can help solve the problem of information overload and provide accurate and fast recommendation information for users. This paper mainly summarizes the current popular recommendation methods, analyzes and compares the meaning of the popular recommendation algorithms. Finally, the application of recommendation algorithm in video industry is introduced.
Optimization on the purification of cassiterite from low-grade cassiterite concentrate
Authors: Dalimunthe D Y , Aldila H , Nuryadin A 
Published: November 2020

Abstract
Optimization on the purification of cassiterite from low-grade cassiterite concentrate has been successfully done. The concentrate used came from the mine site in the Delas area, Bangka Island with an element content of Sn was 31.60% wt and the impurity phases including zircon, ilmenite, quartz, hematite, and monazite. The purification process consists of two steps: mechanical-magnetical separation and acid leaching. The mechanical-magnetical separation step started by color separation (bright sand removal) and removed the magnetic elements of the concentrate subsequently. The content of the Sn element in acid leaching residue increased significantly was up to 90.28% with cassiterite as the dominant phase. The X-ray diffraction (XRD) revealed that the impurity phase of the filtrate after crystallization in all varying pH consists of cassiterite, ilmenite, and ammonium chloride. The solubility of cassiterite concentrate in the acid leaching process is very low at 4.4%, this indicates that the Sn element is difficult to decompose under these conditions.
Stress analysis of a rack gear on sea wave power plant design in Bangka Island
Authors: Rosa F , Prayitnoadi R P 
Published: November 2020

Abstract
Bangka Island is one of the islands in Indonesia which has the potential of marine energy resources. One of the energies is ocean waves that can be used as an alternative to renewable energy in the design of mini power plants. The mechanic system flow that can be applied is sea wave drives float and then it drives a transmission element. Element transmission will rotate the generator that connected by a shaft. The element transmission that used in the plants is rack and pinion gear. This research conducted static analysis software using the von mises and safety factor method on rack and pinion gear. Based on research data, wave data at the headland of a bonded coast in Central Bangka Regency in January 2019 with a maximum wave height of 1,220 m and a minimum of 0.285 m. The force assessment that occurs on the buoy is based on the wave force with a maximum wave height of 287.19 N and the buoyancy force. From the highest height the maximum force obtained at the buoy is 689.54 N and vice versa the weight of the buoy mass. From the analysis using Autodesk Inventor software, it was found that the maximum stress that occurs in pinion gears is 53.14 MPa smaller than the yield strength material and the safety factor that occurs a minimum of 6.59 is greater than the safety factor allowed so that the rack and pinion gear can accept the force exerted by the waves.
Solar Energy Potential Mapping around Yogyakarta Palace As an Effort in Integrating Renewable Energy into Cultural Based Economic Development
Authors: Budiarto R , Dewanto B G , Novitasari D , Aliyah F 
Published: November 2020

Abstract
The Yogyakarta Palace is the main heritage buildings in Yogyakarta Province. It is a main cultural symbol, which is also one of the main tourism objects. This research focuses on The Palace main buildings and surrounding area as an effort to integrate acceleration of renewable energy use into the cultural-based economic development. It considers cross-cutting issues in integrating engineering approach within a complex socio-culture context. The research applied distribution of solar energy potential mapping by using analysis of 3D buildings data in the Open Street Map (OSM), Digital Elevation Model (DEM) and solar intensity data. QGIS software was applied to analyze the 3D buildings data and geospatial aspect. The research also provides a classification of solar energy potential. The mapping shows valuable capacity of The Palace and its surrounding area to produce electricity by the PV technology. Implementing, for instance, the Building Integrated Photovoltaics (BIPV) method in selected buildings, could provide encouraging environment for green tourism in a city of culture melting point as well as increase of renewable energy role and economic development. However, in such delicate issue of PV implementation the mapping and installation works would be far simpler tasks compared to the required intensive socio-culture inclusive process.
Review design of E-Motorcycle charger topology for DC house using planar magnetics
Authors: Muhammad D C , Alfath M I , Naradhipa A M , Husnayain F , Ardita I M 
Published: November 2020

Abstract
Following the global trend of adopting renewable energy into the electric power system, many direct currents (DC) houses concepts are proposed. Most of the renewable energy systems are based on DC voltage sources. This paper discussed the development of a lightweight, low-profile, and built-in electric motorcycle (E-Motorcycle) charger that does not take excessive space and compatible with the DC house system. A topology comparison in high switching frequency above 1 MHz using planar magnetics is performed to select the most suitable DC-DC converter. A wide bandgap (WBG) devices are used to achieve high efficiency in high switching frequency and reduce the charger’s size. Simulation results and design of the selected topology is presented.
Optimization of Battery Energy Storage System (BESS) sizing for solar power plant at remote area
Authors: Baghta N A , Aprilianti K P , Aryani D R , Jufri F H , Utomo A R 
Published: November 2020

AbstractIt is known that the availability of electrical energy will boost economic growth and also industrial growth. However, because the geographical location of the remote area is relatively isolated, the community’s energy demand in the area cannot be fulfilled. Until now, the majority of operated power plants are diesel generator by using fossil fuels. Hence, the addition of renewable energy sources (RESs), especially solar energy (PV) and Battery Energy Storage System (BESS) become a choice to reduce the use of fossil fuels. This study discusses the sizing of BESS and PV to obtain an optimized configuration that maximizes the penetration of RESs and minimizes the utilization of diesel generator. The method of this study will be done by using data from the remote area with simulation and computation using HOMER that can get the best configuration of the system. Thus, the results of this study can be implemented in those areas either at the present or in the future.
Modelling of photovoltaic system power prediction based on environmental conditions using neural network single and multiple hidden layers
Authors: Azka R , Soefian W , Aryani D R , Jufri F H , Utomo A R 
Published: November 2020

Abstract
The solar power plant is an alternative to the provision of environmentally friendly renewable electricity, especially in the tropics, which are sufficiently exposed to the sun throughout the year. However, environmental conditions such as rainfall, solar radiation, or clouds may affect the output power of photovoltaic (PV) systems. These factors make it difficult to know whether PV can meet the needs of the existing load. This research develops a model to predict the output power of a 160 x 285W PV system located in the tropics and has certain environmental conditions. The prediction development is supported by the Python programming language with a single hidden layer and two hidden layers Neural Network, as well as the traditional Multiple Linear Regression tools. The simulation results show that the two hidden layers Neural Network method has a higher level of accuracy compared to the single hidden layer and Multiple Linear Regression as seen from the value of R2, MSE, and MAE.
Study of power flow and stability for a hybrid diesel-PV power system in Indonesia
Authors: Soefian W , Azka R , Jufri F H , Aryani D R , Utomo A R 
Published: November 2020

Abstract
Diesel power plants are still the main choice for supplying isolated grids in Indonesia. Although this kind of power plant is easy to install, it has a high cost of energy (COE) mainly due to the cost of diesel fuel. Besides, Indonesia as a tropical country has a high intensity of solar radiation. Moreover, the investment cost of PV power plant is getting lower and it does not require high operation cost. Thus, the implementation of PV power plant is considered promising in Indonesia, and the idea of combining diesel power plants with PV in isolated grids arises to increase the efficiency of the COE. Apart from the economical aspect, the technical aspect of a hybrid diesel-PV power system implementation needs to be studied as well. In this study, the impact of the PV power plant interconnection to the existing grid is analysed in terms of the power flow and the transient stability using the DIgSILENT PowerFactory software. Furthermore, a load-sharing scheme is applied to some diesel generator units. According to the simulation result, the hybrid power system operated within the allowable voltage limits. After some transient events occurred, the hybrid power system was able to maintain its stability.