bluuebunny/crossref_metadata_2025_split huggingface dataset:
Research on Dispatch Optimization of Self-owned Power Plant under High New Energy Penetration
Authors: Chen Zhenhuan , Yang Zan , Yang Chunxiang , Zhang Bolin , Zhang Tianrui , Zhang Tianyu 
Published: May 2021

Abstract
Considering that self-owned power plant (SPP) can accommodate more new energy generation, this paper proposes a joint dispatch optimization method of SPP. First, two market patterns of SPP considering its load characteristics were established. Then, a self-optimization model of SPP was built with the goal of minimizing SPP operating costs, and a joint optimization model of both SPP and the grid was constructed with the goal of minimizing total system operating costs which comprehensively considered the constraints of SPP interests, unit generation capacity, new energy accommodation requirement and grid security in optimizing the output of SPP and grid-connected units. Next, the optimization models were solved by NSGA-II algorithm. Finally, a comparative case-study on the two models was carried out, and the results showed that SPP can help to accommodate more new energy and reduce system operating costs.
Analysis of Electrical Parameters of Generator Motor No-load Operation Fault
Authors: Shen Yubo , Zhou Hongyi , Han Siwei , Li Zhibin , Zhou Meng , Kong Fanrong , Zhao Xiangyu , Yao Xuyang 
Published: May 2021

Abstract
In the context of my country’s full effort to build pumped storage power stations, my country has the ability to independently research and develop pumped storage power stations, and has set a development goal to manufacture pumped storage units with larger single-unit capacity and higher speed. Generator motors play an important role in the safe and stable operation of power systems, and have a significant impact on power grids and power stations. This paper establishes a physical model of the damping winding of the generator motor, simulates the change of electrical parameters when a short-circuit fault occurs in the no-load operation of the generator motor, and obtains and analyzes the change rule, which has great theoretical and practical significance.
Research on multi-objective optimal scheduling strategy of photovoltaic and energy storage based on dynamic programming
Authors: Liu Hanghang , Wang Yuanyuan , Liu Sentao , Liu Qi , Xie Yun , Ma Xiaoyi 
Published: May 2021

Abstract
The multi-objective model of the electric vehicle and wind power in the load control is established, which stabilizes the peak and valley difference of load and electric vehicle charging and discharging cost. Considering the electric vehicle battery available capacity and charge discharge power constraints, as well as the genetic algorithm for nonlinear programming, this paper analyzes the influence of peak load difference on stabilizing the load fluctuation and improving the return of electric vehicle users. Finally, through the example analysis results show that the multi-objective model can be more optimized through the reasonable price in the electric vehicle charging and discharging and genetic algorithm for nonlinear programming and considering the peak and valley load difference, and the results curve is presented.
Concept and Key Technology Analysis of Electric Pump-Fed Liquid Propellant Rocket Engine
Authors: Liu Yang , Yang Jiangang , He Yuanbo , Ni Zheng , Wu Yue 
Published: May 2021

Abstract
Electric pump-fed liquid propellant rocket engine is an engine that uses electric pumps for propellant supply and cooling cycle. The engine breaks through the traditional pressurization mode of using inert gas to squeeze the propellant or gas-driven turbo pump, and has the advantages of simple system, light structure, high reliability and easy implementation of thrust adjustment. This study introduces the composition, working principle and technical advantages of the electric pump-fed liquid propellant rocket engine, evaluates the factors affecting the mass of the supply system with sensitivity analysis method, and analyses the key technologies of the electric pump-fed rocket engine.
Challenges with the Ultimate Energy Density with Li-ion Batteries
Authors: Fang Haoyu 
Published: May 2021

Abstract
Challenges with the energy density with Li-ion batteries are reviewed. At present, Li-ion batteries are widely used in electronic equipment and electric vehicles, but the energy density is not high. It is important to find out the limitations of the energy density with Li-ion batteries. This essay will start the research with the structure of Li-ion batteries, study the chemistry behind Li-ion batteries and give a summary of the limitations of each battery part which affect energy density. In conclusion, it is the chemistry behind batteries that limits the energy density.
Similarity criteria and scale effect for physical simulation of coal and gas outburst
Authors: Che Yuheng 
Published: May 2021

Abstract
Based on the dimensional unity, analyzed mechanics, adsorption, desorption and seepage characteristics in the process of outburst by equation analysis method. Combining the existing experimental condition, proposed similarity model which could be more similar to practice and theory, and researched scale effect of outburst physical simulation. Analyzed the geometry size influences release area size, elastic energy, gas energy, broken power and throwing power in the process of outburst. Improved similar material of coal and gas outburst, considering seepage characteristic. The results show that realizing the consistency of the stress ratio scale and the gas pressure ratio is the key in the outburst similarity model. Scale effect plays an important role in the occurrence and development of outburst. In terms of energy contribution, gas can contribute more energy to outburst than elastic energy. Refer to energy dissipation, broken work is more than 95 % in outburst energy, and throwing work is only a small part in outburst energy.
Mechanical response and energy dissipation characteristics of granite under low velocity cyclic impact
Authors: Hu Nan , Li Changhong , Xiao Yonggang , Hou Zhiqiang , Qiao Chen 
Published: May 2021

Abstract
In the process of metal ore blasting mining, the surrounding rock in the middle and far area will still be affected by the stress wave generated by the explosion, resulting in the damage and strength reduction of surrounding rock. The fracture process of rock under cyclic impact load is a process of energy absorption and dissipation. The research on the mechanical properties and energy dissipation law of surrounding rock under low velocity cyclic impact has a good reference for the research on the damage law of rock under weak impact environment. In this paper, the granite samples collected from Sanshandao Gold Mine in Laizhou City, Shandong Province were subjected to cyclic impact tests by using a 50 mm diameter split Hopkinson pressure bar (SHPB) test device. The stress-strain evolution law and energy dissipation law of the specimen in the process of damage and fracture are mainly studied. The results show that the dynamic process of a large number of void defects (such as voids, dislocations, microcracks, etc.) in granite under cyclic impact load is strengthened, and the damaged core is formed and propagated, leading to tensile fracture; With the accumulation of strain energy, the damage situation intensifies, and then affects the stress propagation, so that the ratio of incident energy to reflected energy increases linearly with the accumulation of strain energy, and the ratio of transmitted energy also decreases linearly.
Research Progress on the Law of Nitrogen Transfer and Transformation in Sediment
Authors: Ye Shenglan , Shu Xiaoxiao , Xie Xiao 
Published: May 2021

Abstract
The eutrophication of closed and semi-closed landscape water bodies such as lakes and rivers is one of the typical environmental problems in cities. The bottom sludge formed under long-term eutrophic water is prone to re-release of nitrogen and phosphorus elements and cause secondary pollution. While effectively intercepting and controlling external pollution, attention should be paid to the secondary release of internal pollutants. Analyzing the nitrogen exchange of eutrophic sediments in sediments-overlying water-plants and the release of internal nitrogen in sediments is conducive to the wider application and promotion of plant ecological restoration technology in sewage treatment projects.
Removal of Nitrate from Wastewater with Polymer-Enhanced Ultrafiltration (PEUF)
Authors: Li Xue , He Li , Liao Xingsheng , Song Yuhao , Huang Chaoguang , Luo Kun , Pang Ya 
Published: May 2021

Abstract
Polymer-enhanced ultrafiltration (PEUF) is an advanced technology for the efficient separation of heavy metal ions and organic matter from outlet water. The removal of nitrate ions from wastewater via PEUF was investigated using polyethyleneimine(PEI) and cationic polyacrylamide(CPAM). When the concentration of NO3
- was 20 mg/L, the dosage of PEI/CPAM was 0.1 wt%, the best rejection were obtained, rejection of NO3
- were 92.8% and 80.2%, respectively, and rejection of PEI and CPAM were 92.3% and 83.3%, respectively. Effect of pH value on NO3
- rejection was obvious, rejection of NO3
- decreased sharply with the increase of pH value. However, there was no obvious changes on the PEI rejection. The PEUF process was considered to be more suitable for nitrate rejection using PEI as a polymer reagent.
Calculation and analysis of the amount of secondary component products of NOXand SO2on metal oxide surface based on Drifts simulation: A case study of vehicle exhausts emission
Authors: Jia Lijun , Liang bo , Li Cheng , Zhu Kai , Han Wenye , Guan Jie , Gao Guilan , Li Yingjie 
Published: May 2021

AbstractIn this paper, the micro reactions of SO2and NOxin the metal oxides (Fe2O3, MgO, MnO2, Al2O3, ZnO, Cuo, SiO2and Cr2O3) from vehicle exhaust are studied by diffuse reflectance infrared spectroscopy (DRIFTS). The amount of secondary component in PM2.5is analyzed by observing the synergistic or antagonistic effects of different gases on the surface of different metal oxides. The results show that when SO2and NO2coexist, the formation of sulfate is greatly promoted on the surface of Fe2O3metal particles, and the intermediate sulfite is formed at the initial stage and then rapidly oxidized to sulfate. Under the condition of oxygen enrichment, the total species content of secondary components of fine particles formed on the surface of metal oxides is Cr2O3> Fe2O3> MgO > MnO2> Al2O3> ZnO > CuO > SiO2. because Cr2O3has a strong ability to adsorb and activate acid gas, so the content of surface species generated in the micro reaction is more than that of other metal oxides; the metal oxides containing iron, magnesium and manganese can more effectively convert SO2into sulfate in the presence of NOx, but the sulfate generated on the surface of Cr2O3, CuO and Al2O3decreases, which leads to the difference of metal oxide activity It is caused by the change of metal surface properties. This result has a certain guiding significance for the reaction of SO2and NOxto metal oxides emitted by motor vehicles in the atmosphere.
Enhancing the Production of Bioplastics for Sustainable Recycling and Biodegradation-Short Review
Authors: Abioye Abiodun A. , Afolalu Sunday A. , Yusuf Omolola O. , Emetere Moses E. , Ongbali Samson O. , Arubayi Ofome C , Imade Kenneth I. , Olayinka Ayotunde 
Published: May 2021

Abstract
The shift from the production and utilization of synthetic non-plastics to bio-based plastics is on the high side. To curb the environmental nuisances, the synthetic plastics have presented over time. Consequently, it is required to consider some factors that can be manipulated or adjusted to facilitate the biodegradation process. The factors that determine the rate of biodegradation of bio-based and fossil-based plastic and the features of biodegradable plastics are highlighted in this review. This is projected to secure a sustainable bio-plastic synthesis and catalyze bio-recycling and biodegradation strategies.
Recent Advancements in the Development of Nanofluid Technology in Heat Transfer Applications
Authors: Oyeleke O.O. , Ohunakin O.S. , Adelekan D.S. , Atiba O.E. , Nkiko M.O. , Jatinder G. 
Published: May 2021

AbstractThe development of nanofluid technology has created a niche and instigated a new area of novel researches into the enhancement of heat transmittance and transport properties of conventional working fluids with various nanoparticle types in various heat exchange applications, due to the poor thermal performance of conventional fluids. From the development of single nanofluids, to hybrid nanofluids, to the use of surface active agents and stabilizers in ensuring homogenous dispersion and chemical stability, to the use of turbulence promoters with nanofluid, all these were presented as novel developments arising from continuous investigations and study into the heat enhancement performance of different nanoparticle morphology, size, volumetric concentration etc. Thus the subject of this review work is to provide a key insight into the recent advances in the development and utilization of nanotechnology in enhancing heat transfer and transport properties by summarizing progress in the made in the development of nanofluids for the last five years.
Hydrophobic Nanoparticles-Silica from Natural Sands with TMCS as Media
Authors: Munasir  , Safitri Irna Indah 
Published: May 2021

Abstract
The purpose of this research is to synthesize hydrophobic silica nanoparticles (NPS). Modified mixtures of trimethylchlorosilane (TMCS) and NPS are the focus of the analysis of the nature of hydrophobicity. 0.5g of silicon dioxide (SiO2) powder was mixed with TMCS, then coated on a glass substrate using the spin-coating method. Furthermore, the glass was put in a heating oven for one hour, at 65°C. In addition to the hydrophobicity test, morphological analyses using SEM (scanning electron microscopy) were also carried out. The contact angle of 115.6° indicates a hydrophobic nature. The presence of homogeneous NPS SiO2 in the TMCS solution affects the hydrophobic quality of glass surfaces coated with NPS.
Book-Share (BS) Apps using the Android System
Authors: Latif A , Marsujitullah  , Letsoin S M A , Budiasto J 
Published: May 2021

Abstract
Information technologies including information systems play an important role to support education systems specifically in remote area such as Papua. However, based on World’s most literate Nations (WMLN) study found that Indonesia is the second-least literate nation in the World. This study focuses on the empowering of open source android software to facilitate students or teachers to borrow, share or exchange books. The system consists of two modules, i.e. the Backend as a Service (BaaS) is obtained through firebase web service, and client android system. The findings may be helpful for both borrowers and owners using this application in selecting, borrowing, reviewing, applying, adding book profile, and viewing. To end this, the application also able in displaying maps and routes, private messages as well as notification.
Assessing The Quality of Lapors! Using E-Govqual Theory in User’s Perspective
Authors: Safitri E. M. , Suryanto T.L.M. , Faroqi A. , Mukhlis I.R. 
Published: May 2021

Abstract
LAPOR! Is an e-govemment project that is used to manage the aspirations and complaints of the Indonesian people with online system. This information system is expected to minimize the gap between citizens and the government in carrying out various aspects of government. According to the results of a survey conducted by the Indonesian Internet Service Providers Association (APJII) in 2017 LAPOR!’s users still around 0.2% of the total population of Indonesia, 143.26 million. Applications that were booming in 2013-2014 are now neglected in 2019. In addition to the policy changes that underpin the implementation of the information system, LAPOR! declared not as effective and efficient as before. Complaints about public services in LAPOR! now many are neglected and the follow-up is not as intensive as it once was under the supervision of UKP4. The application of a service-based information system requires continuous measurement of an information system evaluation. The measurement results are needed to overhaul the better implementation steps. This study uses an e-govqual approach with quantitative methods that are supported by qualitative data. Quantitative methods were carried out using SPSS 24 and Smart PLS 3. Qualitative data used were interviews with several key informants. The results of this study found that the biggest key to success in implementing LAPOR! is the content and appearance of Information factor.
Decision Tree C 4.5 Algorithm for Classification of Poor Family Scholarship Recipients
Authors: Kustiyahningsih Y , Khotimah B K , Anamisa D R , Yusuf M , Rahayu T , Purnama J 
Published: May 2021

Abstract
The poor family scholarship program is a scholarship program by Lamongan District Education Office. This scholarship is given to underprivileged students for study costs at university. The many indicators of scholarship determination result in difficulties education office in making objective decisions. The purpose is to determine the classification of scholarship recipients using the decision tree C4.5 algorithm. This algorithm has the advantage of speed informing and reading models, high accuracy, flexibility, and processing discrete and continuous data. The contribution of this research is to classify poor family scholarship participants with the C 4.5 algorithm without pruning, pre pruning, and post pruning methods. This study uses 460 data and for each attribute, it is calculated using the gain ratio formula to produce trees and decision rules. Based on the scenario that has been done the accuracy value generated after pruning is better than without pruning. The classification process using scenario post pruning technique is used as a reference for the classification of new registrants because it has the highest accuracy of 85.55%.
xtended Technology Acceptance Model (TAM) for “Desa Digital” Mobile Application Users: A Literature Study
Authors: As’adi M , Dewi A C , Andy R , Zaman A N 
Published: May 2021

Abstract
The sustainability of Industry 4.0 has now entered into the tourism sector or Tourism 4.0. However, the existence of information technology as a provider has not been widely used in the context of Tourism 4.0 in Indonesia. Recent mobile technology, the application namely “Desa Digital” requires an in-depth evaluation of an intention to use and actual system usage. Hence, this study uses a Technology Acceptance Model (TAM) to understand the intention to use and actual system usage for “Desa Digital” mobile application users in Indonesia. A literature study is conducted in identifying variables that are important on the acceptance model. Furthermore, this paper identifies social presence, perceived enjoyment, perceived ease of use, perceived usefulness, perceived compatibility, and attitude toward use influencing intention to use and actual system usage.
Mobile Support in Ubiquitous Learning Systems
Authors: Amaliyah Yuli , Widat Faizatul , Zamroni  , Agusmiati Sinta , Sa’diyah Hasan Halimatus , Hindia Maimunatul , Utami Alfania Diah 
Published: May 2021

Abstract
The very rapid development of technology requires us to keep pace with the times as it develops. These technological advances have made everything more modern, practical and efficient. This study aims to determine our perceptions of the use of mobile devices as a learning system. The existence of this mobile device makes the learning system more practical, besides that it can also be used anywhere. This research uses a qualitative approach with case studies. The results showed that: the impact of mobile devices is very influential and helps a lot in the learning system, the learning process becomes easier, and also broad. Through mobile devices students are easier to memorize and can be done at any time and can be applied everywhere.
THD Analysis on a Single Phase 7-Level Diode Clamped MLI with LC Filter Based on Multicarrier Anti-Phase SPWM Technique
Authors: Rusdi Muhamad , Ponadi Acep , Hardiantono Damis , Haryanto Sumbung Frederik 
Published: May 2021

Abstract
Inverter is an electronic device which is an important part to convert DC-AC energy. Increased use of renewable energy as a substitute for fossil energy that is running low encourages the increased performance of the inverter. Multilevel inverter offer many advantages for improving the performance of an inverter system. Diode Clamped Multilevel Inverter are explored with 7-level circuits that are analyzed and simulated specifically on the quality of the output ie the amount of harmony. The power switch control technique uses Anti-Phase SPWM with multicarrier. Further to maximize damping harmonics, LC filter is applied and researched. This research is using PSpice A / D Lite to simulate a system that worked. The results obtained harmonic attenuation reached 3.93% after LC filter.
Optimum Distance Planning of Wireless Sensor Network Using Linear Regression Method
Authors: Ubaidillah Achmad , Alfita Riza , Shoiman Wahyudi Mohammad 
Published: May 2021

Abstract
This research is very important to know the performance and capability of ESP-01 as a sensor node in network planning using Wireless Sensor Network (WSN). The optimal distance between nodes is obtained from the recording using the wireshark application. The linear regression method is used to build distance forecasting systems with packet loss and delay metrics. Observation is done by simulation using Network Simulator and direct measurement using wireshark. The results showed that the recommended optimal distance is 34 meters with a good category network quality.
Smart Controlling system for Kitchen Fire Protection based Internet of Things
Authors: Haryanto  , Anifah L , Rahmawati D , Sahputra A K , Laksono D T 
Published: May 2021

Abstract
The use of IoT is urgently needed, its use makes life efficient both in terms of energy and time. In order to minimize the danger of fire in the kitchen, we proposed smart controlling system for kitchen fire protection based Internet of Things. The controlled part in this study are stove and LPG’s lid. Data received by the temperature sensor, smoke sensor and human sensor will be sent to the server, so the user can acces from yheir smartphone. If the condition is dangerous, a warning will be given to the user’s smartphone, and the user can control stove and LPG’s lid through the application on their smartphone. The design phase consists of designing hardware, software, servers, IoT, and applications to control the hardware. The implementation phase is implementing the design that has been made and then testing all elements. Testing phase by testing the harware, software, and system integration. The testing process aims to ensure that all elements work well according to the design. The results show that the system managed to anticipate early on from fires.