bluuebunny/crossref_metadata_2025_split huggingface dataset:
Modelling Study of EMBr Effect on Interface Fluctuation and Melt Flow in a Thin Slab Mould
Authors: Lv Xin-sheng , Xu Lin , Liu Cong , Guan Duo-jiao , Pei Qun-wu , Xu He-yuan 
Published: August 2023

Abstract
Electromagnetic brakes (EMBrs) are regularly used in continuous casting to control interface fluctuations in a mould. In the research, to appraise the damping effect of EMBr technique, namely EMBr-ruler technique, the influence of magnetic field intensity on behaviours of melt flow and interface fluctuation in a Compact Strip Production (CSP) thin slab funnel mould are numerically simulated. The numerical results illustrate that the existence of the EMBr-ruler technique is conducive to inhibiting the impact of the ascending circulation on the interface in the CSP funnel mould. With the gradual enhancement of magnetic intensity, the service efficiency of the EMBr-ruler on the fluctuation of two-phase steel/slag interface is enhanced. For instance, by applying a magnetic induction intensity of 0.5 T, the maximum fluctuation height of two-phase steel/slag interface is decreased to 6.4 mm. This can well prevent surface defects, such as slag entrapment.
Optimization of multi-objective integrated energy efficient utilization based on the digital twin
Authors: Zhao Lin , Hou Yixin , Jiang Haiwei , Liu Guangshuo , Yang Fangyuan 
Published: August 2023

Abstract
To address the effect of non-determinacy on power system scheduling patterns, a comprehensive multipurpose optimization scheduling method is proposed. First, region mathematical methods are used to describe many uncertain factors, such as unit performance, connectors, prices, user response, and changes in the power system. Second, considering the differences in production methods and conversions of high-quality intensity, the built-in electrical system scheduling, multi-objective gold standard scheduling methods to align built-in power equipment under multiple uncertainties. Finally, based on the multipurpose linear programming method, the most effective scheduling model range of forced equipment is integrated. Many symptoms can occur under uncertain conditions. The numerical results indicate that the proposed multipurpose scheduling model can meet most needs, improve the economic and energy efficiency of the machine, and enhance the system’s ability to cope with uncertainties.
Application of digital intelligent construction in the field of water conservancy and hydropower engineering
Authors: Liu Rongrong , Luo Zuliang 
Published: August 2023

Abstract
The application of intelligent construction technology is gradually penetrating the field of water conservancy and hydropower engineering. This article systematically summarizes the application research of intelligent construction in water conservancy and hydropower engineering, including intelligent design, intelligent construction, and intelligent monitoring. In terms of intelligent design, the use of BIM technology to establish three-dimensional modeling of water conservancy and hydropower projects can achieve collaboration, communication, and management of multiple aspects of information and improve design efficiency and quality in terms of intelligent construction. The use of robot technology and automation equipment can achieve construction automation and digitization, reduce human errors and safety risks, and improve construction efficiency and quality. In terms of intelligent monitoring, real-time monitoring, and intelligent management of water conservancy and hydropower projects can be achieved through the Internet of Things and big data technology, timely detection of problems, and early warning processing, ensuring the safe and stable operation of the project. A sound management system is established with standard specifications to promote the widespread application of intelligent construction in the field of water conservancy and hydropower engineering.
Multi-Objective Location Method for Small Capacity Distributed Generation under Timing Characteristics
Authors: Tang Yi , Wu Hanjiang , Wu Kehan , Chen Cai , Ma Luyao , Huang Jie 
Published: August 2023

AbstractThe conventional multi-objective location method of distributed generation mainly uses the static stability index to determine the load of distributed generation, which is vulnerable to the impact of load timing characteristics, resulting in a high active power loss of different nodes. Therefore, it is necessary to design the multi-objective location method of small-capacity distributed power sources based on the timing characteristics. That is, the multi-objective location algorithm of small capacity distributed generation is designed based on the multi-objective function, and the multi-objective location model of small capacity distributed generation is constructed according to the timing characteristics to achieve the multi-objective location of small capacity distributed generation. The experimental results show that the designed multi-objective location method has low active power loss, which proves that the designed location method has good location effect, energy saving and certain application value, and has made a certain contribution to saving the comprehensive operation cost of distributed power generation.
Experimental study of a hydraulic model of the side inlet and outlet of a pumped storage power station
Authors: Li Gaohui , Lu Ting , Chen Funan , Yang Shaojia , Jiang Lei , Zhen Haolei 
Published: August 2023

Abstract
Inlets/outlets have bi-directional characteristics and complex structures, which have important implications for practical operational safety and efficiency. In this paper, the hydraulic characteristics of the lateral inlet/outlet of a pumped storage power station are studied by means of model tests. The flow velocity distribution at the leading edge of the inlet/outlet orifice and the barrage section is more uniform, and the flow velocity distribution at the left, middle, and right of each orifice is the same. The formation of swirl is related to the relative submergence depth s/d and the Froude number Fr, with the inlet/outlet Fr< 0.23, relative submergence depth s/d> 0.5 and it has no harmful eddies.
The Motion Response of Trailing Suction Hopper Dredger under the Influence of Swell
Authors: Zhu Ping , Wang Sheng , Lyu Hanghang , Hao Yuchi 
Published: August 2023

Abstract
With the continuous development of the dredging business to overseas markets, dredging ships are faced with a more and more complex hydrodynamic environment. Swell with long wave periods has a great impact on the adaptability of ship operations. Focused on the Trailing Suction Hopper Dredger (TSHD), this paper studied the motion response characteristics of the TSHD under the influence of swell. The result shows that the motion response of the TSHD is severely affected by swell. The amplitude of the ship motion response increases with the increase of wave height. When subjected to the transverse swell with the 90° wave direction, both the heave and roll response amplitude of TSHD is the most significant. While under the influence of swell with the 0° wave direction, the TSHD only pitches violently. The results can guide the suitability assessment of dredging ships in the swell area.
Modeling and Analysis of Aluminum Cable Joints in Steady State for New Energy Stations
Authors: Gao Zhao , Wang Le , Zhang Haoran , Li Boyi , Fan Lijun 
Published: August 2023

Abstract
Compared with copper cables, aluminum cables have certain advantages in engineering costs and transportation costs, but have installation difficulties in the application process. However, limited by the manufacturing process, installation technology, and operating conditions, the intermediate joint of the aluminum cable is prone to failures such as insulation deterioration caused by abnormal temperature. The temperature of the core of the conductor in a steady state in the cable joint is the most direct and effective physical quantity, which can reflect the operating state. So modeling and analysis of the aluminum cable joint, as well as the study of its internal temperature change mechanism and influencing factors, are to improve the process and installation level of the aluminum cable joint and to develop the basis of the corresponding temperature monitoring system. In this paper, the thermal conduction mechanism of aluminum cable joints in a steady state is analyzed by using the thermal circuit theory. Then, the thermal circuit model of aluminum cable joints in a steady state based on the equivalent thermal circuit model and its parameter calculation method are proposed. By building an experimental platform, the validation experiment finally proved the accuracy of the method proposed in this paper.
Renewable Energy Power System Unit Commitment Considering Regional Frequency Stability Requirement
Authors: Cao Bin , Miao Lifang , Liu Hongqing , Lai Shuyu , Wang Cheng 
Published: August 2023

Abstract
With the development of new power systems, the formation of a “double high” pattern in frequency has made frequency security a prominent problem. It is particularly important to formulate a unit power generation plan with frequency security constraints at the day-ahead scale. However, a unit commitment model with frequency security constraints based on a unified frequency for the entire network cannot be used because the frequency exhibits spatial variations. This problem is solved in this study by establishing a single-machine aggregation model for the frequency response of a partitioned power system. In the unit commitment model, the frequency support between individual regions is established based on the distribution of the disturbance power over individual subregions. The index of the initial frequency change rate is introduced for each subregion to establish an analytical expression for the relationship between the frequency security constraints and the unit commitment scheme. Finally, the effectiveness of the model and the solution algorithm is verified for the improved IEEE39 node system.
Design and Verification for Measurement and Control System of Large-scale Ship Model
Authors: Shi Panhao , Li Dehai , Shen Jiacheng , Huang Lei , Wu Yongshun , Yang Sujun 
Published: August 2023

Abstract
The navigation performance of the ship model is generally studied by the hydrodynamic parameters of ship models with the help of test chamber towing tanks or external waters. Considering the difference among the conditions of the indoor field towing tank or the outer field water area and the actual sea state, to solve the problem of the large-scale ship model series test under the actual sea state in this article, a large-scale ship model measurement and the control system was designed, including heading control system, controller, propeller propulsion device, rudder actuator and power supply module and others. It is used to test the maneuvering performance of large-scale ship models in the sea. On this basis, the reliability and effectiveness of the system were verified by testing the speed and maneuverability of the model in open water.
A Robust Parameter Identification Approach with Anti-Outlier Characteristics for Lithium-Ion Batteries
Authors: Ning Xuefeng , Shi Zhenglu , Xu Jiazhu 
Published: August 2023

Abstract
Accurate acquisition of model parameters of lithium-ion batteries (LIBs) is imperative for precious estimation state of charge. However, due to the interference of noise, the inevitable uncertainty may lead to outliers appearing in measurement data, which often leads to inaccurate parameter identification. To solve the problem, a robust Kalman filter (RKF) that uses the Mahalanobis Distance Criterion (MDC) is proposed for the parameter identification of LIBs. Firstly, the one-order equivalent circuit model of the LIBs is created. Subsequently, the gain of robust factor is implemented into the Kalman filter to decrease filter gain and swell the measurement noise covariance when facing the outlier measurements. Finally, the dynamic stress test condition of the electric vehicle is used to prove the effectiveness of the RKF-MDC approach. The simulation reveals that the RKF-MDC can reduce the influence of outlier values for the parameter identification of LIBs.
Compressor Operation Monitoring and Optimization Method for Large-scale Natural Gas Pipelines
Authors: Shui Chongyuan , Shao Ruifan , Wei Shulong , Li Hongjun , Zhou Dengji , Xu Linfeng 
Published: August 2023

Abstract
The monitoring of large-scale natural gas pipelines is vital to their reliable and effective operation. To the lack of data analysis and operation advice functions in existing monitoring systems, this work established a pipeline monitoring system. The pipeline working state was uncovered with data reconciliation and thermodynamical models. Temporal load distribution was depicted for operation monitoring. Based on historical data, operation advice for working compressor numbers and outlet pressure of each station was generated by the system. Deployed on a practical pipeline, the software architecture of the system was introduced. Tested with field data, the system showed good performance on data analysis and operation advising.
Effect of Fuel Injection Advance Angle on the Performance of Ethylene Glycol/Diesel Engine
Authors: Wang Qiwei , Lin Hang , Fan Jinyu , Li Pinfang , Huang Jialiang 
Published: August 2023

Abstract
To further investigate the performance of the glycol/diesel dual-fuel engine, we conducted a simulation test by varying the injection advance angle of the diesel engine. Thus, we investigated the effect of different injection advance angles on the dual-fuel engine. Simulation tests were conducted to study the effects of different injection advance angles on the performance of ethylene glycol/diesel engine when the mixing ratio was 15% and the injection advance angles were 14.6°, 16.6°, 18.6° and 20.6°, respectively. The research shows that when the fuel injection advance angle increases to 20.6°, in-cylinder temperature and in-cylinder pressure both increase compared with the original engine, the CO emissions decrease by 6.9%, the NO emissions increase by 4.3%, and the soot emissions increase by 11%. The indicated power is 48.85 kW, which increases by 0.4%.
Research on the Fusion Positioning Technology of 5G+ Beidou Based on the Federated Kalman Algorithm
Authors: Song Jinliang , Wen Xin , Liu Yue , Wang Dongdong , Guo Linlang , Liu Jiaqiang , Sun Qian , Tong Haosong , Xiao Nan , He Lishuai 
Published: August 2023

Abstract
In the new energy Internet scenario, unmanned patrol navigation of power lines, accurate fault location of power equipment and position monitoring of power towers put forward higher requirements for power location technology. Aiming at the problems of heavy workload, low accuracy and poor real-time performance of the existing power positioning scheme, a fusion positioning technology of 5G+ Beidou based on federated Kalman algorithm is proposed, considering the real-time dynamic differential correction data transmission technology.
Reactive Power compensation Optimization of Distribution Network with Distributed Power Supply
Authors: Yuan Junqiu 
Published: August 2023

Abstract
In recent years, distributed generation has been fully developed, and its permeability is rising, which also brings great challenges to the reactive power regulation of the power distribution network. By analyzing the output characteristics of active power and reactive power of distributed power supply, in this article, a multi-objective optimization mathematical model of reactive power compensation is established, which takes the economy and security of the power distribution network into consideration. The results indicate that the reactive power compensation optimization model and the solution algorithm in this paper have good effectiveness and superiority. This thesis will provide the theoretical foundation and technology support for the design and realization of the DG reactive power compensation scheme.
Studying Interoperability of Different Compensation Networks in Inductive Power Transfer Systems
Authors: Gao Feng , Luo Zhiwei , Zhao Zhigang , Wang Zihao , Zhao Hongzhi 
Published: August 2023

Abstract
The issue of interoperability between electric vehicles and different wireless chargers, resulting from the diverse compensation networks, is impeding the engineering application of IPT technology. The objective of the paper is to investigate the interoperability of different compensation networks for inductive power transfer systems. The study analyses three potential cases of compensation design, which include LCCS, SLCC, and LCCP compensation networks. To evaluate the performance of these networks, a proposed analytical methodology is utilized to delve into the power factor of the compensation networks. Additionally, in order to assess their sensitivity to parameter changes, the power displacement under mistuned conditions is calculated by adding additional series inductors to the main coil. Finally, the proposed analysis is validated by simulation models, which indicate that the SLCC network has better tolerance to parameter variations under mistuned conditions.
A Novel Fault Current Full Compensation Method in Active Flexible Grounding Distribution Networks
Authors: Xu Ziqiang , Ye Tairan , Wang Chenyu , Liu Baowen 
Published: August 2023

Abstract
As the power equipment represented by the inverter is gradually increasing in the power systems, the residual capacitive component of the grounding fault current cannot be ignored. To solve the problem of insufficient compensation for capacitive components in the traditional arc suppression coil grounding mode, a grounding fault current full compensation method based on the active flexible grounding mode was proposed. First, the principle of full compensation in the active flexible grounding mode was analyzed to provide a reference for the injected current of voltage arc suppression full compensation. Then, the inverter control system was designed, and a closed-loop control method was proposed, both of which can ensure the stable target current of the system. Finally, the simulation results compare the fault current compensation difference between the two grounding modes, and the practicability of the proposed compensation method was verified.
Predictive Warning of Photovoltaic Generation Anomalies Based on Neighbour Profile Method with Spatial Correlation
Authors: Li Nan , Ma Xue , Li Fang , Yang Fan , Li Xiantao , Qi Mengxue 
Published: August 2023

Abstract
A photovoltaic generation has been widely applied due to the maturity of the correlation technique and the falling cost of materials. However, the characteristics of strong volatility and uncertainty have limited the consumption of photovoltaic power energy, which is caused by a combination of random factors from the natural environment and photovoltaic device conditions. Compared to the unpredictability of random natural factors, photovoltaic device anomalies can be detected from the spatial correlation. This paper proposed the photovoltaic generation anomalies warning method based on the neighbor profile method. To testify to the efficiency of the proposed method, experiments based on the four real photovoltaic plants are conducted in this paper. The results show the neighbor profile value of abnormal devices is different from the normal ones and verify the feasibility of the proposed method.
Simultaneous enhancement of upconversion luminescence and photoelectric effect in NaYF4:Yb3+/Tm3+/Zr4+ tri-doped microcrystals
Authors: Liu Bing , Liang Jingheng , Wang Lili , Tiu Zian Cheak 
Published: August 2023

Abstract

β-NaYF4: Yb3+/Tm3+/Zr4+ microcrystals are synthesized by a facile hydrothermal route. The up-conversion (UC) luminescence and photoelectric effects are enhanced simultaneously with the introduction of Zr4+ ions under IR excitation. With the Tm3+ ions fluorescence spectra under 980 nm excitation, the blue and red emissions reached the highest intensity in the case of 4 mol% Zr4+ doping. Taking the advantage of Zr4+ stimulates the free electrons transfer from the valence band (VB) to the conduction band (CB) in β-NaYF4:Yb3+/Tm3+/Zr4+ microcrystals, the photocurrent reached the highest intensity in the case of 4 mol% Zr4+ doping at 780 nm excitation. The β-NaYF4: Yb3+/Tm3+/Zr4+ microcrystals with both enhanced UC luminescence and photoelectric properties are highly potential to contribute in photovoltaic and infrared sensors application.
Eco-friendly approach for the construction of biochar-based superhydrophobic membrane for effective oil/water separation
Authors: Beagan A , Fetouh H A , Zhong D L , Mohamed M E 
Published: August 2023

Abstract
Researchers are looking at improved oil/water separation techniques due to the industry’s struggles with the separation of oily wastewater. One promising approach is to use superhydrophobic, SHP, membranes to separate oil from oily wastewater. In this study, we developed SHP textile fabric based on biochar, BC. The BC was synthesized from banana leaves by pyrolysis and then modified with nickel metal to produce Ni@BC. The textile fabric, TF, was submerged in an ethanolic solution of Ni@BC, and stearic acid, SA, to produce the SHP coating. The Ni@BC was utilized to improve the roughness of the surface of the pristine TF, and SA was utilized to reduce its surface energy. Scanning electron microscope, SEM, was used to investigate the surface morphology of the pristine and modified TF. The SEM results show that the modified TF shows a micro-nano structure. Atomic force microscopy, AFM, was utilized to study the surface roughness. The results show that the modified TF has a surface roughness greater than the pristine TF. The energy-dispersive x-ray spectroscopy techniques and Fourier transform infrared spectroscopy confirmed the structure of Ni@BC and the grafting of both SA and Ni@BC to the TF. The wettability finding demonstrated that the modified TF had a high degree of superhydrophobicity, with a high-water contact angle of 161° and a low water sliding angle of 1°. The modified TF showed excellent oil/water separation performance, with a separation efficiency of 99.9%. The oil absorption capacity of the TF was also high, with a capacity of 303 g g−1 for silicone oil, and it also has a high flux rate. The modified TF was also found to be mechanically and chemically stable, with no significant degradation after 10 cycles of use. The results of this study demonstrate that the biochar-based SHP TF is a promising material for oil/water separation.