bluuebunny/crossref_metadata_2025_split huggingface dataset:
Effect of Janus Nanoparticles on Foam Stability
Authors: Du Ruotong , Li Ning , Cui Zijing , He Zongli , Zhou Likang , Tang Zixiang , Wang Yang 
Published: February 2023

Abstract
The foam properties of different surfactants were evaluated by the stirring method. The synergistic foam stabilizing effect was formed by the combination of lauryl glucoside and hydrophilic nanoparticles, but the result was feeble. The blend of Janus nanoparticles and surfactants significantly improves foam stability, and the two have a strong synergistic effect on foam stability. The compound system has a specific temperature resistance. Kruss dynamic surface tensiometer and surface dilatation rheometer were used to measure the gas-liquid interface properties of the hydrophilic nanoparticles compound system, Janus nanoparticles compound system, and surfactant system, respectively. The effects of Janus nanoparticles on the surface tension and surface dilatation modulus of the compound system were analyzed, which were correlated with the stability of the foam.
A Research on the Method of Thermal Design for Lithium-ion Battery Modules
Authors: Lai Yilin , Liu Hao , Yang Kai , Qu Zhanzhan , Zhang Mingjie , Gao Fei 
Published: February 2023

Abstract
The thermal management of lithium-ion battery modules for energy storage is of great significance to the safe operation of battery modules. In this paper, a thermal design method of lithium-ion battery modules is proposed to test the real-time heating power of lithium-ion batteries, and simulate the temperature field change during the charging and discharging process of the battery module through CFD simulation software. A 6kWh lithium-ion battery module is designed using the method. The maximum temperature difference between the simulation results and the test results of the module prototype is only 1°C, proving that the simulation method has high accuracy.
Research on Suppression of Fuses of Potential Transformer Fuse
Authors: Zhao Xiayao , Guo Hongbing , Yang Yue 
Published: February 2023

Abstract
In this paper, through the analysis of an electromagnetic Potential Transformer (PT) fuse fault in the distribution network, it is found that the cause of this type of fault is the low-frequency oscillation and inrush current of the voltage transformer caused by the disturbance, and its occurrence mechanism is studied and explained. After analyzing the advantages and disadvantages of the common PT fuse-blowing fault control measures, this paper proposes a treatment plan for the PT neutral point to suppress the fuse blowing through a nonlinear flow-sensitive harmonic elimination device. The harmonic device has a remarkable suppression effect on the PT fuse blown fault.
Stress analysis of the knuckle of the cylinder based on ABAQUS
Authors: Ren Tenghui , Jin Mei , Liu Hongjiao , Wang Xiaoyu 
Published: February 2023

Abstract
In this paper, three kinds of knuckle of heat exchanger cylinders are proposed: the knuckle of the cone, the knuckle of equal wall thickness, and the knuckle of the equal fillet. The stress analysis of the three structures is carried out by using the finite element software ABAQUS. The location of the maximum stress of the three structures is determined. Through comparative analysis, it is found that the knuckle of equal fillet has better pressure-enduring capacity.
Voltage Difference Envelope to the Control Simulating of Connection Frequency of Seamless Shoring
Authors: Huang Zijin , Xiao Leming , Fang Zimeng 
Published: February 2023

Abstract
Through the intelligent control of single chip microcomputer and Hall sensor detection technology and signal transmission technology, the frequency, voltage and voltage phase of the shore power and the ship power are detected to form the lowest point of voltage difference envelope, and the seamless connection of the shore power and the ship power is controlled. The load transfer control between the shore power and the ship power realizes the ideal synchronous control of grid-connected closing and load transfer by establishing the ratio control of frequency difference between the shore power and the ship power and power change during load transfer.
Single Loop Voltage Control Strategy Based on Model Predictive Control for NPC-UPS
Authors: Li Zhiyan , Zhu Xiaobo , Ye Qing , Tian Shuaituan , Xiang Huilun 
Published: February 2023

Abstract
UPS can provide stable electrical energy for sensitive loads when severe grid disturbance happens. A neutral point clamped (NPC) three-level voltage source converter is used as the circuit topology for UPS. In this study, the discrete mathematical model of UPS is derived and a single voltage loop control strategy based on model predictive control is presented. The proposed method has a simple control structure and a fast response speed and omits the current inner loop and modulator. Furthermore, it can achieve ac voltage control and the balance of dc-side voltages. A three-level UPS simulation model is set up in PSCAD, and the efficacy of the proposed method is verified by means of simulation results under various types of loads.
Pure Electric Vehicle Power System Matching Design and Simulation
Authors: Zheng Minghua , Zhou Heng , Zheng Jingtang 
Published: February 2023

Abstract
According to the design requirements of pure electric drive modification of a certain A-class car and the vehicle’s fundamental parameters, the longitudinal dynamics theory of the vehicle is used to analyze the driving motor, power battery and fixed speed ratio transmission, and other key components. With the help of Cruise simulation software, a pure electric vehicle powertrain model was established and simulation tests were carried out on the New European Driving Cycle, 60km/h isokinetic range cruise, 100km/h acceleration time, and hill-climbing degree and other operating conditions. The results show that the parameters of the power system of pure electric vehicles are reasonably selected, and the power indicators, driving range, and power consumption per 100 kilometers meet the performance design requirements of the whole vehicle, which have theoretical guiding significance for the development of the whole vehicle.
Research on Composition of White Powders in High-voltage XLPE Cable with Buffer Layer Failure
Authors: Yang Youmin , Li Mailin , Yang Le , Lan Tianbao , Li Kejian 
Published: February 2023

Abstract
Recently, a new type of high-voltage cross-linked polyethylene (XLPE) cable failure called buffer layer failure occurs from time to time. The failure occurs at the cable body between the insulation screen and the aluminum sheath, which is different from the traditional one that occurs at the intermediate joint or cable accessory. The main feature is white corrosion marks on the inner surface of the aluminum sheath, dotted potholes, and ablation marks on the outer surface of the insulation screen. Especially there are dotted white powder and burnt holes on the surface of the water-blocking tape. Given the white powder in this new failure, imitating the actual structure of the cable, this paper builds a three-layer model of the buffer layer in the laboratory. The water-blocking tape is placed between the insulation screen and the aluminum sheath. The white powders were reproduced by injecting water into the tape and extruding it. The micro-morphology of white powder was observed by scanning electron microscope (SEM) and the element composition was measured by energy dispersive spectrometer (EDS). The results show that the white powder of water-blocking tape contains Al, which is the product of a chemical reaction with an aluminum sheath.
Experimental research of a dual-beam compressive-mode piezoelectric energy harvester
Authors: Li Zhongjie , Peng Xuzhang , Gong Ying , Zhu Chuan , Zhang Lan , Peng Yan 
Published: February 2023

Abstract
In this article, we present a dual-beam compressive-mode piezoelectric energy harvester (DC-PEH). The DC-PEH is made up of a force amplifier, a piezoelectric stack, and a pair of symmetrically arranged cantilever-mass systems, supported by a base that is fixed on a rod. A two-stage force amplification mechanism of the DC-PEH is realized by coupling the elastic beams with the force amplifier. We first established a force analysis to describe the two-stage force amplification effect of the DC-PEH. Furthermore, a prototype has been fabricated and we carried out a series of experiments. We examined the open-circuit voltage and working bandwidth of the DC-PEH to verify the two-stage force amplification effect under different accelerations. Moreover, a parametric study was performed to investigate the influence of structure parameters on the output performance of the DC-PEH. We conducted the frequency sweep response and power output comparisons with different lengths of beams and different masses.
A Data-driven AC Optimal Power Flow Using Extreme Learning Machine
Authors: Liang Weichen , Wang Yajuan , Zhao Zhiyu , Liu Bo , Li Xuan 
Published: February 2023

Abstract
With the increasing integration of renewable energy (RE), AC Optimal Power Flow (AC OPF) becomes a necessary foundation for electricity system which has a high level of renewable energy generation. However, most current studies of AC OPF are not applicable due to the requirements of high computation speed in practical applications. To this end, we propose a data-driven method using Extreme Learning Machine (ELM) for getting the AC OPF optimal solution in a faster way. This approach can map the relationship between the optimal operation results and variations of REs and loads, avoiding the time-consuming solving process of AC OPF. Moreover, an ELM network structure suitable for AC OPF is designed to significantly improve the computational speed of ACOPF with acceptable accuracy. This method was applied to the RTS-79 system for improving the calculation efficiency of the AC OPF.
Evolution mechanism of functional groups during coal chemical looping combustion
Authors: Kuang Cao , Wang Shuzhong , Zou Xiangbo , Sun Jingli , zhao Jun , Ye Ji , Qin Shiwei , Chen Gongda 
Published: February 2023

Abstract
Chemical looping combustion (CLC) plays a vital role in coal combustion which released pure CO2 in the exhaust gas with low energy consumption. Researchers have developed over 1000 oxygen carriers (OCs) to enhance the properties of OCs. This study focus on the microstructural changes of coal during CLC process which could provide the performance improvement direction for OCs. Results showed that the phenolic -OH group can easily be removed by CuO while the free -OH group and the self-associating -OH group are hard to be consumed by the lattice oxygen in CuO at 800 °C, showing good stability in CLC process. Aliphatic hydrocarbons could be consumed in the gas phase rapidly. The functional group of C=O maintains high reactivity with CuO which explains why the addition of CO2 promotes the reaction rate in coal CLC. But C=C group was nonpolar bond and hard to be consumed while the -CH2 and -CH3 group and C-O-C group showed good reactivity with CuO. Higher reaction temperature affords higher reactivity of coal CLC process. But the -OH group changed slowly at higher temperature which could because that higher temperature makes the organic big molecular of the coal char decomposed and produce more -OH group.
Understanding the mechanism of ash deposition on boiler heating surface: The lattice Boltzmann and molecular dynamics simulations
Authors: Sui H , Wang Y , Kou X , Zhao J , Hou F , Li Y 
Published: February 2023

Abstract
Severe ash deposition can cause a decrease of the heat transfer ability on the heating surface for the furnace and the release of more pollutants. In order to get the widespread use of Zhundong coal, the temperature distribution characteristics of ash deposition for Zhundong coal was studied by lattice Boltzmann method in this paper. Furthermore, the microstructure of slag was further revealed by molecular dynamics. The results indicated that the temperature of ash deposition improves with the increase of time. The temperature of the particles in the outer and middle layers for Zhundong coal is significantly smaller than that of lignite and bituminous coal. Compared with other coal types, it is difficult to transfer heat for the deposited layer of Zhundong coal, which can not achieve better energy saving effect. Additionally, calcium and sulfur in Zhundong coal ash can easily react to form calcium sulfate, aggravating ash deposition on the heating surface of the boiler. These results provide a theoretical support to solve the problem of ash deposition burning Zhundong coal.
Modification and Application of Materials for Strong Inhibitory Drilling Fluid
Authors: Jun Jia , Lei Chen , Wei Wei 
Published: February 2023

Abstract
Due to the strong inhibition of drilling fluid, many polymer fluid loss additives can not play their role. Therefore, it is necessary to develop some water loss reducing materials that can withstand the strong inhibition environment. In this paper, the surface of asbestos fiber was modified and treated by indoor experiments. The physical and chemical properties of the obtained drilling fluid treatment samples were evaluated to optimize the appropriate amount of reagents used for surface treatment of asbestos. Subsequently, the drilling fluid performance of the obtained treatment agent samples were evaluated at different temperatures to analyze the effect of temperature on the drilling fluid performance. The surface of asbestos fiber was modified by adsorbed cationic surfactant CTAC which better solved the problem of entanglement of asbestos fiber in drilling fluid. The mechanism of the action of the surface of asbestos fiber was analyzed by scanning electron microscope observation experiments. Subsequently, different amounts of modified asbestos fiber was added to the drilling fluid and the performance of drilling fluid was evaluated at different temperatures. The experimental results showed that the modified asbestos fiber reduced the filtration loss of drilling fluid and still maintained good filtration loss reduction effect at 200°C.
Research on the progress of Ce3+,Tb3+ co-activated phosphate luminescent materials prepared by hydrothermal method
Authors: Qi Pengyuan , Cong Yu , Yu Linhui , Ge Xinmeng , Hao Chunlai , Wang Fei , Yang Zhongliang , Zhan Jiaxing , He Lijie 
Published: February 2023

Abstract
Due to the special optical properties of rare earth elements, rare earth luminescent materials have been widely used in lighting, medical radiological images, detection and recording of radiation field and other fields. Through the research and analysis of phosphate LaPO4:(Ce3+,Tb3+), Ca9Y (PO4):(Ce3+,Tb3+), GdPO4:(Ce3+,Tb3+) composite materials by the hydrothermal preparation of cerium-terbium co-activated, the hydrothermal preparation process (additives, reaction system pH, hydrothermal time, hydrothermal temperature, etc.), luminescent properties and application status were clarified. XRD and SEM were used to analyze the effect of hydrothermal preparation process on the phase composition and morphology of samples, and the energy transfer efficiency was determined. PL spectroscopic analysis shows that the 4f→5d and 5D4→7Fj (j=6,5,4,3) transitions in Ce3+-Tb3+ UV region have been demonstrated in a variety of matrix materials, enabling efficient energy transfer in co-doped ion combinations., and the concentration of doping ions will significantly affect the luminescence properties.
Untangling the importance of dynamic and thermodynamic drivers for wet and dry spells across the Tropical Andes
Authors: Klein Cornelia , Hänchen Lorenz , Potter Emily R , Junquas Clémentine , Harris Bethan L , Maussion Fabien 
Published: February 2023

Abstract
Andean vegetation and agriculture depend on the patterns of rainfall during the South American monsoon. However, our understanding on the importance of dynamic (upper-level wind circulation) as compared to thermodynamic (Amazon basin moisture) drivers for Andes rainfall remains limited. This study examines the effect of these drivers on 3–7 day wet and dry spells across the Tropical Andes and assesses resulting impacts on vegetation. Using reanalysis and remote sensing data from 1985–2018, we find that both dynamic and thermodynamic drivers play a role in determining the rainfall patterns. Notably, we show that the upper-level wind is an important driver of rainfall across the entire Tropical Andes mountain range, but not in the Amazon lowlands, suggesting a crucial role of topography in this relationship. From thermodynamic perspective, we find wet spell conditions to be associated with increased moisture along the Andes’ eastern foothills accompanied by a strengthened South American low-level jet, with moisture lifted into the Andes via topography and convection for all considered regions. Our results suggest that while changes in Amazon basin moisture dominate rainfall changes on daily time scales associated with three day spells, upper-level dynamics play a more important role on the synoptic time scale of 5–7 day spells. Considering impacts on the ground, we find that only 5–7 day spells in the semi-arid Andes have a prolonged effect on vegetation. Our study emphasizes the need to consider both dynamic and thermodynamic drivers when estimating rainfall changes in the Tropical Andes, including in the context of future climate projections.
Water-related conflicts: definitions, data, and trends from the water conflict chronology
Authors: Gleick Peter H , Shimabuku Morgan 
Published: February 2023

Abstract
Violence associated with freshwater resources has occurred throughout recorded history, with water triggering violence and armed conflict, water or water systems being used as weapons, and water or water systems becoming casualties during conflicts. Understanding the causes of water-related violence and regional and temporal trends is critical for identifying priority areas for conflict resolution and strategies to reduce the risk of future conflicts. The purpose of this paper is to introduce the structure, content, and design of The Water Conflict Chronology, an open-source online database, which tracks water-related conflicts from around the globe. Some analysis is provided with caveats about the limitations of the data, but further analysis will be forthcoming. The database is updated approximately annually using information from other conflict-related databases, news reports, eyewitness accounts, and a review of historical documents. As of October 2022, the Chronology had 1298 entries, from the earliest events around 2400 BCE through early 2022. Initial analysis of data shows trends in the nature, location, and social and political characteristics of water-related violence, including a sharp increase in water-related violence in recent years, especially where water has been a trigger or casualty of violence, a concentration of events in the Middle East, southern Asia, and the Sahel, and the increased targeting of civilian water systems during civil and regional armed conflicts.
Study of irrigation regimes of corn varieties NS-770, NS-6010 in conditions of meadow alluvial soils of Bukhara region
Authors: Juraev F U , Kadirov Z Z , Isoyeva L B , Najmiddinov M M , Bobirova M B 
Published: February 2023

Abstract
Optimizing the balance of nutrients in the soil, obtaining a high yield of grain and green mass, and providing the population with food products, raw materials for industry, and nutritious feed for livestock are achieved by improving the irrigation method and irrigation procedures in the cultivation of corn in the main and repeated periods. In this regard, scientific research on the effect of using new fertilizers developed on the basis of phosphorites together with nitrogenous and potassium mineral fertilizers on the growth, development, and productivity of corn, as well as on the development of optimal technology for their use is considered relevant.
Phyllophages biotopic distribution in sparsely wooded regions plantations
Authors: Belitskaya M N , Gribust I R , Drevin V E , Morozova Z Ch , Zenina E A 
Published: February 2023

Abstract
The study of the main woody plants entomofauna diversity peculiarities in sparsely wooded regions with arid climate is an urgent scientific direction and the basis for the design of ecologically balanced multifunctional plantations in the arid zone. The presented materials illustrate the peculiarities of the arthropod phyllophages diversity of trees growing in the FSC of Agroecology RAS dendrological collections. The species and quantitative abundance of individual ecological and trophic groups of fauna, types of damage to plants’ different parts of the Ulmaceae, Fabaceae, Rosaceae families and a number of others were revealed. The structure of the dendrophages community was assessed. The insects’ orders distribution features according to the types of plantations were analyzed.
Changes in the morphological structure and mechanical properties of sandy soils
Authors: Yusupova M A , Idrisov X A , Abduxakimova H , Eshpulatov Sh Ya , Darmonov D Yo , Matxoliqov R B , Mamatqulov O O 
Published: February 2023

Abstract
The analysis of the genesis, properties of sand and sandy soils developed in different periods in Central Fergana, the changes in the agro-ecological and reclamation conditions under the influence of anthropogenic factors involves in the efficient use of land resources. The main purpose of the study is to study the genesis, geography, and formation of soils formed in sandy areas, eco-reclamation processes occurring under the influence of natural conditions and irrigation, to determine the agrochemical, physicochemical and other properties of irrigated sandy soils. The research was carried out in the field, laboratory, and cameral conditions according to generally accepted standard methods in soil science, the research used geographical, morphological, natural-historical, chemical-analytical, and cross-sectional methods. The scientific significance of the results of the study is explained by the laws of specific formation and distribution of sandy soils and irrigated sandy soils of Central Fergana, changes in the eco-reclamation state under the influence of anthropogenic factors, disclosure of physical and mechanical dynamics, productivity, conservation, and restoration.
Comparative analysis of drought resistance of plum cultivar-rootstock combinations in dry steppe conditions
Authors: Nikolskaya O A , Solonkin A V , Kikteva E N 
Published: February 2023

Abstract
The adaptability of the variety to abiotic environmental factors depends on a number of factors, one of which is the rootstock on which the variety is grafted. The data on the influence of various rootstocks on the drought resistance of the grafted variety and the dependence of this influence on the prevailing meteorological conditions of the growing season are presented. Drought resistance was studied in the laboratory according to the indicators of the water regime and the the ability of leaves to retain moisture. The correlation dependence of drought resistance of cultivar-rootstock combinations on the hydrothermal coefficient of the growing season is revealed. Rootstock forms were identified that have a positive effect on increasing the drought resistance of the variety and the most drought-resistant variety-rootstock combination was selected for each variety.