bluuebunny/crossref_metadata_2025_split huggingface dataset:
Characteristics and performance of aerobic granulation seeded with anaerobic bioflocs for treatment of domestic wastewater
Authors: Purba L D A , Abdullah N , Yuzir A , Halim M H Ab 
Published: July 2020

Abstract
In the present study, aerobic granular sludge was developed using a combination of anaerobic bioflocs and activated sludge. The granulation process and removals of organic compound (COD and ammoniacal nitrogen) were observed for 140 days of experimental period. The granulation process occurred after 30 days of the experiments, indicated by the decrease in sludge volume index (SVI) and increase of biomass concentration. The COD and ammoniacal nitrogen removal efficiencies were 67% and 72%, respectively. Mature aerobic granules were developed with diameter ranging from 4 to 6 mm with excellent settling velocity at 75 m/h. The results indicated the possibility to use anaerobic bioflocs as seeding to develop aerobic granular sludge for domestic wastewater treatment.
Production of Liquid Fertilizer from Chicken Feather Waste by Using Subcritical Water Treatment for Plant and Algal Growth
Authors: Zul Syamimi Mohd , Iwamoto Koji , Mohd Rahim Maziahtul Ashikin , Abdullah Norhayati , Mohamad Shaza Eva , Shimizu Kazuya , Hara Hirofumi 
Published: July 2020

Abstract
Chicken is one of the most popular protein sources for majority of the population, and million tons of chicken feathers waste are generated every year in Malaysia. However, it is a potential renewable source because feather is rich in keratin proteins and amino acids. In this study, the chicken feather was hydrolyzed into high value-added organic fertilizers by subcritical water (SCW) technology, and the effect of the SCW organic liquid fertilizer were investigated on the growth of spinach plant and red algae Galdieria sulphuraria. The resulted SCW liquid fertilizer contained 34,200 mg/L of nitrogen and 1,380 mg/L of phosphorus. The agronomic parameters of the spinach plants supplied with SCW liquid fertilizer and commercial fertilizer grew better compared to control plants. G.sulphuraria growth in 2x Allen’s medium with addition of SCW liquid fertilizer, glucose and peptone, respectively was indicated by OD at 750 nm using a UV-VIS spectrophotometer. Thus, the utilization of SCW liquid fertilizer affecting the growth of spinach plants and G.sulphuraria are possibly eco-friendly approach in poultry waste treatments.
Flood Forecasting using Committee Machine with Intelligent Systems: a Framework for Advanced Machine Learning Approach
Authors: Faruq Amrul , Abdullah Shahrum Shah , Marto Aminaton , Che Razali Che Munira , Mohd Hussein Shamsul Faisal 
Published: July 2020

Abstract
Among many natural hazards, flood disasters are the most incisive, causing tremendous casualties, in-depth injury to human life, property losses and agriculture, therefore affected the socioeconomic system of the area. Contributing to disaster risk reduction and the property damage associated with floods, the research on the advancement of flood modelling and forecasting is increasingly essential. Flood forecasting technique is one of the most significant current discussion in hydrological-engineering area, in which a highly complex system and difficult to model. The past decade has been seen the rapid development of machine learning techniques contributed extremely within the advancement of prediction systems providing better performance and efficient solutions. This paper proposes a framework design of flood forecasting model utilizing committee machine learning methods. Previously published works employing committee machine techniques in the analysis of the robustness of the model, effectiveness, and accuracy are particularly investigated on the used in various subjects. It is found that artificial neural networks, hybridizations, and model optimization are reported as the most effective ways for the improved development of machine learning methods. The proposed framework employs four representative intelligent systems as individual members, including radial basis neural networks, adaptive-neuro fuzzy, support vector machine and deep learning networks to construct a committee machine. As a conclusion, this committee machine with intelligent systems appears to be capable of enhancing the designing of flood forecasting model for disaster risk reduction.
Integrated geophysical methods for determination of lithology and unstable slope, case study: Cipogor area, PSK-1 mini hydro power plant
Authors: Prawira G A , Arphan F , Darrian  , Warnana D D , Sugiyono  , Anggrea T O 
Published: July 2020

Abstract
Cipogor is an area in PSK-1 Power Plant located at West Java. This area has a damaged flushing canal due to landslides at 2018. Therefore, integration of two-dimensional resistivity (ERT), one-dimensional resistivity (VES), and Digital Elevation Model is conducted to determine lithology and unstable slope that characterized by water saturated weak zone. Resistivity models from ERT and VES method are integrated with elevation data from DEM. Lithologies from interpreted VES model are as follows: Alluvial (6 – 70.06 Ωm), Tuff sediments (12 – 28.44 Ωm), sandstone sediments (1.96 – 9 Ωm) and Breccia (42.07 – 88.6 Ωm) from Koleberes Formations. There is an anomaly (12 – 28.98 Ωm) within sandstone layer. From ERT model, there is low resistivity zone (2-5 Ωm) interpreted as weak zone and moderate resistivity zone (16-24 Ωm) around 9-17 m in depth, interpreted as sediments transported during previous landslide. From the interpretation, it can be concluded that there is weak zone in depth 5-6.91 m and 17-20 m which is a weathered sandstone of Koleberes Formation and a sediment layer that transported from previous landslide in depth 9-17 m. Heaving is occurred in this layer and preventing any large landslide to occur but cannot prevent soil creeping in the area.
Study on Optimization Design of Ground Source Heat Pump System with Horizontal Spiral Pipes
Authors: Su Shunyu , Wu Rui 
Published: July 2020

Abstract
How to solve underground soil thermal balance problem is important for ground source heat pump system. Basing on the experiments of a ground source heat pump system with horizontal spiral pipes in Wuhan, the operation controlling strategies of intermittent operation and continuous operation in this system were studied in this paper. The temperatures of inlet and outlet water in the underground heat exchanger, and soil temperatues around the buried pipe were tested. And these temperaure changes in the intermittent operation and continuous operation are compared and analyzed. The results show that soil temperatures around the buried pipe will recover quickly in the testing intervals of intermittent operation. Intermittent operation has advantages over continuous operation for this ground source heat pump system. It provided the designers of ground source heat pump system with beneficial information about underground soil heat accumulation.
Application of vegetable oil amide derivatives in oil field pipeline anticorrosion
Authors: Zeng W G , Lv Y H , Hua Z Z , Wang H , Xu D X , Xu M 
Published: July 2020

Abstract
Based on rapeseed oil and soybean oil, and diethylenetriamine and formaldehyde, a plant oil derived amide inhibitor was synthesized. The inhibition performance of plant oil derived amide inhibitor on A13 steel in 1 mol / L hydrochloric acid was studied by weight-loss experiment, electrochemical analysis and quantum chemical calculation. The adsorption behavior and mechanism of the inhibitor on A13 steel surface were revealed. The results of electrochemical experiments were consistent with the results of weight loss tests. The contact angle test results showed that the plant oil derived amide inhibitor can significantly enhance the hydrophobicity of A13 steel surface. The thermodynamic parameters show that the adsorption of plant oil derived amide inhibitor on A13 steel surface was self. The results of quantum chemical calculation showed that there are a lot of active sites in the structure of amide inhibitor derived from vegetable oil.
Hardware-in-loop test platform design for AVC sub-station of the new energy station based on RT-LAB
Authors: Wang Nan , Zhao Wei , Sun Shumin , Cheng Yan , Wang Yuejiao , Xing Jiawei 
Published: July 2020

Abstract
In order to ensure the safe and stable operation of the large power grid with high proportion of renewable energy access, the automatic voltage control (AVC) system of the new energy power station is very important. The control strategy of the AVC and the response characteristics of the voltage and reactive power regulating equipment will affect the AVC regulation effect directly. However, the pure digital simulation software cannot simulate its actual response characteristic. This paper established a hardware in loop (HIL) testing platform based on RT-LAB real-time simulation system. The real AVC controller and the real static var generator (SVG) controller hardware are connected to RT-LAB testing platform via I/O physical interface and MODBUS communication, and the HIL coordinated simulation testing scheme is studied based on FPGA of RT-LAB. With established testing platform, the voltage regulating characteristic and reactive power replacement capacity of AVC control strategy is verified.
Low-voltage cold-start circuit for energy harvesting suitable for indoor sunlight
Authors: Pan Jiaju , liu Xinning , Yu Dengbang 
Published: July 2020

Abstract
This paper proposes a low-voltage cold-start circuit suitable for indoor sunlight energy harvesting in TSMC 40nm CMOS process. The circuit can work normally when the input voltage is as low as 200mV and is compatible with a wide input power range. Pulse-skipping modulation (PSM) is used to control the circuit’s operation and sleep. The main structure includes a ring oscillator, a two-phase clock drive circuit, a linear charge pump, a low-power voltage reference, and a hysteresis comparator. Compared with other cold-start circuits, the structure proposed in this paper can realize the function of voltage rise without the aid of external machinery or voltage. Simulation results show that when the input voltage is in the range of 200mV to 700mV, the cold-start circuit can stably output 800mV to power the subsequent circuit.
Simulation analysis of Henan Province’s rising path under the background of energy revolution
Authors: Jinhui Zhao , Chaopeng Zhang 
Published: July 2020

Abstract
In order to study the restriction and promotion relationship of the energy revolution to the rising provinces in central China-Henan Province, this article builds an energy revolution consumption model based on the multi-dimensional development data of Henan Province from 2010 to 2018, and predicts Henan’s GDP growth from 2020 to 2035, energy demand, changes in primary energy structure, and CO2 emissions. The results show that: under the scenario of rapid economic growth, the total GDP of Henan Province in 2035 is 11561.1 billion yuan; in the scenario of benchmark growth, the total GDP is 11018.5 billion yuan. The path of high-quality rise in Henan Province may be between SE21 and SE25. In 2035, the proportion of renewable energy will increase to 24.4%. The peak of Henan’s carbon emissions may appear in 2021, with total carbon emissions between 49.577 million to 50 million tons. Based on the above data, Henan Province should take the road suitable for the development of regional energy revolution and promote the high-quality rise of Henan Province.
Nitrogen and oxygen co-doped broccoli-like porous carbon nanosheets derived from sericin for high-performance supercapacitors
Authors: Shi Xing-Yu , Xue Wei-Dong , Wang Wen-Jian , Zhao Rui , He Dong-Xu 
Published: July 2020

Abstract
Broccoli-like porous carbon nanosheets with high levels of heteroatoms doping was successfully synthesized from the wasted sericin via an environmental friendliness and cost-effective strategy. The hierarchical porous carbon nanosheets was formed from chemical expansion and activation by Mg2(OH)2CO3·xH2O simultaneously. Benefiting from the elaborate structure of NPCN-4, the prepared material shows the satisfactory energy storage ability in electrical double-layer capacitors (EDLCs) area with an outstanding specific capacitance of 214.5 F g−1 at 0.5 A g−1 in an alkaline solution and high capacitance retention of 87% at 10 A g−1 after 10000 cycles.
A Method of Optimal Malfunction Management in Urban Natural Gas Transmission and Distribution Systems
Authors: Lv Xiaodong , Ding Hao 
Published: July 2020

Abstract
Given the increasing number of urban natural gas transmission and distribution systems, it is particularly crucial to optimize the management of natural gas operations, especially when equipment failure or pipeline leakage occurs in the supply system. To meet the needs of customers for natural gas, in this paper, we considered two cases of pipeline rupture leakage and pressure regulation station failure for different supply areas. We combined natural gas supply pipelines, pressure regulating stations and a gasholder station to establish a failure optimization management model and used genetic algorithms and one-dimensional fluid dynamics models for optimization management and proposed the following two solutions: 1. Complete operation strategy: modify both the pressure of the pressure regulating station and the air supply volume of the gasholder station; 2. Partial operation strategy: modify the pressure of the pressure regulating station only, and keep the supply volume of the gasholder station constant. Finally, our model is applied to an urban natural gas transmission and distribution system. Based on the actual results, failure optimization management is proposed according to the location and the type of failure and constructive options are suggested for the operation of natural gas networks.
Design of Central Air-conditioning Partition Scheduling System Based on WLAN Positioning
Authors: Zhang Yansong , Wang Yong , Yuan Bowen 
Published: July 2020

Abstract
A partition scheduling system of central air-conditioning based on Wireless Local Area Network (WLAN) positioning is designed. The system can quickly update the personnel density of the partition by WLAN positioning algorithm, and obtain the actual load by integrating the temperature and humidity and the surrounding partition information. Therefore, the rotating speeds of the fans and water pumps of the air conditioning in this area are automatically adjusted, so as to realize the intelligent scheduling of the air conditioning in different areas based on personnel density. At the same time of regional differentiation, the overall cooperative operation can truly achieve the energy-saving effect of distribution on demand.
Improvement on Anti-cavitation Performance for a 120 MW Kaplan Turbine
Authors: Li Yunzhe , Liu Qilin 
Published: July 2020

Abstract
The model test results show that the initial runner developed for LB HPP has the problem of clearance cavitation, which does not meet the design requirements of no cavitation in the whole operating range. In order to find out the reasons of clearance cavitation, and put forward the corresponding optimization method, the numerical simulation method is used to calculate the clearance flow inside runner on the basis of the entire passage calculation. By analyzing the pressure distribution on blade surface and the flow characteristics inside runner blade clearance, the reasons of clearance cavitation have been found, the initial runner blade has been optimized, and the secondary model test has been carried out. The results of the secondary model test show that the optimized runner blade can meet the design requirements.
Model test of pumping operation of Sanhekou hydro-junction project
Authors: Wu Yajun 
Published: July 2020

Abstract
Aiming at the pumping operation of Sanhekou Hydropower Station’s pump-turbines, based on model tests, data measurements were performed on the rated speed and variable speed pumping operations. In addition, the efficiency test and hump margin test were implemented, and the corresponding performance curves were obtained. The results meet the engineering design requirements and can provide technical guidance for the speed control of the power station.
Dynamic reconfiguration of distribution network with new energy generation considering economic and reliability
Authors: Hao Tian , Li Lu 
Published: July 2020

Abstract
The penetration rate of new energy power generation in the distribution network has gradually increased, and the traditional static reconfiguration for a certain time section will be difficult to meet the actual operation requirements of the distribution network. A dynamic reconfiguration model of the distribution network with network loss, voltage offset, and new energy abandonment rate as the optimization goals was established. An adaptive genetic algorithm was used to solve the dynamic reconfiguration optimization of the distribution network. By simplifying the traditional network, a large number of infeasible solutions generated during the encoding process are reduced, and the optimization ability of the algorithm is improved. Based on the IEEE33 node system, four different scenarios were set up for simulation analysis. The results show that the reconfiguration can significantly reduce the network loss and voltage offset of the system, and also significantly improve the utilization efficiency of new energy and effectively improve the operation level of the distribution network. The feasibility and correctness of this method were verified.
Research and Application of 5G Technology in Power System
Authors: Huan Li , Lishuai He , Di Gai , Fanbo Meng , Dongdong Wang 
Published: July 2020

Abstract
5G, as the cutting-edge technology of wireless network access, it has the advantages of high-speed, low delay, high-density access and slicing function. Combined with the data transmission of intelligent equipment in the substation, it can greatly improve the wireless network access ability of intelligent equipment and sensing unit. For the purpose of improving the intelligent inspection ability of the substation and provide the communication foundation for the big data analysis of the operation state of the substation equipment. we can build a high-density, high bandwidth, low delay wireless network platform through 5G wireless communication network. According to the business requirements, the system can realize the rapid state perception and IOT interaction of data sensors in the transmission terminal layer. With all communication and data transmission requirements satisfied.
Research on the integration development of sports intangible cultural heritage and national fitness
Authors: Guo Chuan-yan , Xu Shi-jun , Luo Ge 
Published: July 2020

Abstract
This paper explored the integration and development of intangible cultural heritage sports and national fitness from the perspective of organization. The research shows that the intangible cultural heritage of sports based on folk custom and tradition can enrich people’s spiritual and cultural life and the content system of national fitness. The construction of national fitness system with Chinese characteristics is helpful to protect the intangible cultural heritage of sports. Conclusion: We should strengthen the construction of grass-roots sports organizations, improve the degree of organization, explore the sports methods in line with national conditions, and organically integrate the protection of sports intangible cultural heritage with the national fitness system.
Influencing Factors of Grain Farmers’ Application Behavior to Adopt Organic Fertilizer from the Perspective of Heterogeneity—Based on The Empirical Study of 512 Farmers in Sichuan Province
Authors: Xiang W J , Chen J P , Fu X H 
Published: July 2020

Abstract
Based on the survey data of 512 households in Sichuan Province, this paper uses the binary logistic model to analyze the influencing factors of organic fertilizer application behavior of grain farmers in the perspective of heterogeneity. The study shows that the organic fertilizer application behavior of grain farmers is a complex decision-making behavior under the interaction of various heterogeneous factors. In terms of human capital, grain farmers who are young, highly educated and have a large family labor force are more likely to apply organic fertilizers; in terms of economic capital, grain farmers with high household income and high proportion of agricultural income are more likely to apply organic fertilizer; in terms of social capital, grain farmers who joined farmers’ specialized cooperatives and received training on organic fertilizer and had some family members who have served as village cadres prefer to apply organic fertilizer. In terms of natural capital, the large scale of cultivated land and the low degree of fragmentation of cultivated land are conducive to promoting the application of organic fertilizers to grain farmers.
Economic Feasibility and Comprehensive Benefit Evaluation of Rural Household Biogas Utilization: Evidence from China
Authors: Xia X M , Wang F 
Published: July 2020

Abstract
It is of great significance for the scientific formulation or adjustment of rural energy policy in the new era to explore the current situation of rural household biogas utilization and make a comprehensive evaluation of the benefits of biogas and its derivatives. Based on the field survey data of Qionglai, Sichuan Province, this study uses AHP to build a comprehensive evaluation index system, uses financial indicators to calculate the economic benefits of household biogas, and establishes the weight and score of the index system to comprehensively evaluate the economic, ecological and social benefits of biogas and its derivatives utilization in the survey area. The research results show that the economic benefits and social benefits of rural household biogas are good, but the ecological benefits are not up to the ideal level. Under the background of rapid development of new rural construction and urbanization, the government still needs adjusting policies, so as to meet the challenges of structural changes in the domestic energy consumption market.
Research of present status and development suggestions regarding the carbon capture, utilization and storage
Authors: Zong Jianfang , Sun Liang , Bao Wei 
Published: July 2020

Abstract
The carbon capture, utilization and storage (hereinafter referred to as “CCUS”) technology has already been widely regarded as an available method of great potential for carbon dioxide emission reduction. As predicted, the emission reduction contribution will rise from 3% of the total emission reduction amount in 2020 to 10% in 2030, and to about 20% in 2050, which becomes the individual technology of the greatest contribution to the carbon dioxide emission reduction. This paper illustrates the main links of CCUS technology: the carbon capture process, carbon transport, carbon utilization and carbon storage. This paper introduces the storage methods of carbon dioxide, the geological storage and marine storage. In addition, this paper also analyzes the main storage practices both at home and abroad, the major overseas storage projects and the present status and progress of China’s storage. In addition, this paper also discusses the main challenges encountered by China’s CCUS development, and proposes the ideas and policy suggestions that promote China’s CCUS development.