bluuebunny/crossref_metadata_2025_split huggingface dataset:
Remaining useful life prediction of lithium-ion batteries based on the Support Vector Regression Optimized and Enhanced Whale Optimization Algorithm
Authors: Wu Wei , Chen Zhen , Li Linman , Pan Ershun 
Published: September 2023

Abstract
Accurate and reliable predictions of the remaining useful life (RUL) of lithium-ion batteries are crucial for ensuring the proper functioning and longevity of lithium-ion battery systems. Predicting the RUL in its early stages can be challenging and difficult for conventional RUL prediction techniques. To tackle this challenge, this paper proposes a novel approach that integrates five carefully chosen health features with a Support Vector Regression Optimized model and Enhanced Whale Optimization Algorithm (EWOA-SVR) to predict the future capacity trend and subsequently estimate the RUL using XGBoost method according to the predicted capacity. The proposed approach aims to achieve early and accurate capacity estimation and RUL prediction for lithium-ion batteries. To begin, this method extracts some health features during the relaxation process and during the constant-current and constant-voltage charge (CC-CV) process. To demonstrate the strength of the correlation between the health features and capacity, both Pearson and Spearman rank correlation analysis are employed in this study. Then based on the measurable health features and faded capacity data, Ant Lion Optimization (ALO), Whale Optimization Algorithm (WOA) and EWOA are used to select suitable penalty factor and kernel parameter in the SVR algorithm to improve the performance of SVR. With the well-trained model, the future capacity can be predicted with an accuracy of MAPE within 1%, and the RUL prediction error is lower than 11 cycles. The results suggest that the proposed model can achieve a precise and dependable early estimation of the future capacity and RUL prediction.
Analysis and preventive measures of lightning protection on UHVDC transmission lines
Authors: Zhao Xia 
Published: September 2023

Abstract
The causes of flashover on UHVDC transmission lines due to lightning strikes are analyzed. Then, after the introduction of the characteristics of flashover caused by lightning strikes, the types of lightning strikes and discrimination method, the calculation method of lightning performance, and the methods of identification of faults, the preventive measures are proposed.
Operation control technology of source network load storage area based on flexible application of energy storage
Authors: Li Zheng , Yao Zhongyuan , Shen Xuhui , Tang Haiyan , Ba Lei , Zhang Yu 
Published: September 2023

Abstract
This paper studies the operation control technology of source-network-load-storage area. Firstly, the flexible application mode of energy storage in the source-network-load-storage area is analyzed. Secondly, the definitions of absolute mileage and relative mileage are proposed, and the power coordination control model of energy storage units based on mileage balance is established to achieve the purpose of efficient utilization of energy storage resources. Finally, the operation control strategy of the source network load storage area is proposed, which verifies the effectiveness and practicability of the power coordination control model of the energy storage unit and the operation control strategy of the source network load storage area.
Technical research on test method of the socket and switch of temperature monitoring alarm function
Authors: Li Rui , Wang Yongyu 
Published: September 2023

Abstract
The emergence of sockets and switches with fire protection monitoring and alarm functions had realized the forward detection of the fire risk monitoring gateway, which had played an important role in preventing the occurrence of electrical fires. In 2014, the national standard GB31252 “Fire Monitoring and Alarm Sockets and Switches” was promulgated and implemented, which detailed the product functions, performance and test methods of fire protection monitoring and alarm sockets and switches. This article is based on the difficulty of accurately controlling the heating process when measuring the temperature alarm value of the socket and switch. A new type of simulated temperature alarm test method was designed, and a detection device for the temperature test of the fire monitoring alarm socket and switch was developed. And the testing device was tested and verified. The test results show that the testing device designed in this paper can meet the technical requirements of the temperature part test in GB31252-2014.
State of charge estimation of lithium-ion batteries using improved BP neural network and filtering techniques
Authors: Li Yan , Ye Min , Wang Qiao , Wei Meng , Lian Gaoqi 
Published: September 2023

Abstract
The state of charge (SOC) is a critical parameter in the battery management system (BMS), and its accurate estimation is essential for ensuring the safety and reliability of batteries. This paper presents a lithium-ion battery SOC estimation method that combines an improved neural network with a filtering algorithm. Firstly, the backpropagation (BP) algorithm is chosen as the architecture of the neural network in the hybrid method due to its strong nonlinear approximation ability, and the particle swarm optimization (PSO) algorithm is used to optimize it to avoid falling into local optimal solutions. By combining the search ability of PSO with the learning ability of the BP neural network, the accuracy of the neural network model is improved. The proposed method integrates the PSO-BP model with the extended Kalman filter based on minimum error entropy (MEE-EKF). PSO-BP is utilized as the measurement equation for MEE-EKF, while the ampere-hour integration method is employed as the state equation to achieve closed-loop SOC estimation. Finally, experimental validation is conducted under four typical operating conditions and one random condition across a wide temperature range. The results demonstrate that the proposed method achieves high accuracy across all conditions compared with the results of other algorithms, with a maximum absolute error of not exceeding 3.13%, a mean absolute error of less than 0.54%, and a root mean square error of no more than 0.66%.
Research and analysis on noise characteristics of low voltage power lines carrier communication
Authors: Ren Yi , Zhu Enguo , Zhang Hailong , Li Ran , Chen Kuixi , Lu Jizhe 
Published: September 2023

Abstract
Noise is one of the most important factors affecting the reliability of low-voltage power line carrier communication. In order to fully grasp the noise characteristics, a channel analysis equipment has been designed to collect and analyze noise. The analysis results show that power line noise is mostly manifested as a combination of colored background noise and pulse noise, mainly concentrated in the frequency band below 700kHz. Compared with the low peak period of electricity consumption, the peak period has stronger time-varying noise, larger amplitude of background noise, richer components of pulse noise, and there is also jitter in the duration of periodic pulse noise.
A remote 5G wireless control device for shearer
Authors: Huo Pengfei , Liu Hongjie , Duan Chao , Wang Xingxing , Wang Jing , Gao Bo , Tian Muqin 
Published: September 2023

Abstract
In order to realize the intelligent mining mode of the shearer, this paper designs a remote 5G wireless control device to implement remote wireless control of the shearer. The device consists of two main components: upper computer system and receiving system. Among them, the upper computer system sends control commands through the 5G network and transmits them to the receiving system; The receiving system is used to receive signals from the upper computer, control the remote controller of the shearer to perform corresponding operations, and achieve the purpose of controlling the shearer. The remote wireless control device solves the problems of poor working environment and high safety risk of shearer workers in traditional control. At the same time, the introduction of 5G network, which has the characteristics of low delay and high reliability, has realized the purpose of remote wireless control of the shearer in the centralized control room.
Development of intelligent automatic water intake system for open-pit mine
Authors: Wang Qiantao , Geng Pulong , Qiu Hongtao , Zhang Junwen , Zhao Ru 
Published: September 2023

Abstract
In order to solve the problem that the automation level of water intake system in open-pit mine is relatively low and the phenomenon of fault shutdown occurs from time to time, this paper innovatively develops an intelligent automatic water intake system based on LabVIEW suitable for open-pit mine. On the basis of extensive investigation of field conditions and in-depth analysis of domestic and foreign open-pit mine water intake system, the overall design scheme of this system was put forward. The selection of electric gate valve, ball valve, various sensors and Siemens 1200 series PLC was completed. The system software which integrates system initialization subroutine, pump rotation start-stop subroutine, sensor polling subroutine, fault protection and alarm subroutine was compiled. The monitoring software of Upper machine was developed based on LabVIEW software platform. The field debugging and operation results show that the system realizes the real-time monitoring of the operation state of the water intake unit, the on-demand start and stop and the intelligent rotation control of the water pump, which greatly reduces the labor intensity of the workers, prolongs the service life of the equipment, greatly improves the intelligent operation and maintenance level of pumping units of open-pit mine, and lays a solid foundation for green mining.
Design of gas flow standard facility for continuous detection with two stations
Authors: Wan Yong , Liu Li , Chen Yixiang 
Published: September 2023

Abstract
The traditional gas flow standard facility can only carry out single station detection, so it is urgent to solve the problem of improving work efficiency. In this paper, the existing gas flow standard facilities and related technologies are studied in depth, especially for the same specifications, batch detection table, the design of double station continuous detection type gas flow standard facilities. Its main features are: according to the need to flexibly choose two stations alternating detection, two stations at the same time detection or single station detection mode, under the premise of ensuring the safety and reliability of the facility, greatly improve the work efficiency. In this paper, the operation process and flow diagram of the three detection methods are given in detail, and the applicability and improvement direction of the facility are analyzed and prospected. This facility design work efficiency enhancement advantage is significant, has a good promotion value.
Two sets of capacitor load based I-V curve tracer for photovoltaic cell
Authors: Xiao Wenbo , Yan Youkang , Wu Huaming , Liu Bin , Li Yongbo 
Published: September 2023

Abstract
Two sets of capacitor load based I-V curve tracer for
photovoltaic cell are designed and implemented (Test system one
includes Raspberry Pi, capacitor, current sensor, and
analog-to-digital converter, etc.; test system two includes data
acquisition card, capacitor, and sampling resistor, etc.). The
conclusions are made: (1) the measurement results of both systems
are generally correct, but neither can obtain short-circuit current
due to the inability to achieve a load resistance of zero. Test
system two based on the data acquisition card is found to be higher
accuracy. (2) The factors affecting the accuracy of test system two
is studied. The larger capacitance leads to more precise measured
data. Smaller sampling resistors result in output voltages closer to
zero and more complete I-V curves. When the sampling rate is
high, noise may cause oscillating I-V curve.
Simulation study on total ionizing dose effect of IGBT gamma irradiation
Authors: Fang J. , Hao J.H. , Zhao Q. , Fan J.Q. , Dong Z.W. 
Published: September 2023

Abstract
The insulated gate bipolar transistor (IGBT) has emerged as a prominent high-power semiconductor device due to its excellent overall performance. It is widely utilized in various fields, including aerospace. Due to prolonged operation in complex irradiation environments, the performance of IGBTs is susceptible to degradation and damage. Therefore, conducting research on the variation of IGBT characteristics under irradiation environments is crucial to ensuring their long-term functionality in extended space missions. To evaluate and analyze the total ionizing dose (TID) effect of IGBTs during operation, this study adopts a trench IGBT as the device model. Utilizing the finite element method, technology computer-aided design (TCAD) is employed to simulate and analyze the electrical characteristic changes of IGBTs under different total radiation doses. The simulation results are subsequently validated through theoretical analysis. The simulation results indicate that gamma radiation significantly affects the overall electrical characteristics of IGBTs.
Capacitance-based absolute pressure gauge for beamline vacuum measurement applications
Authors: Teotia Vikas , Kumar Prashant , Sawant Sampada , Meshram Sumit , Patil S.R. , Malhotra Sanjay 
Published: September 2023

Abstract
For low-pressure measurements, capacitance diaphragm-based absolute pressure gauges are used owing to their high accuracy, media independence, and simplistic design. Catering to the general requirements of synchrotron beamline vacuum measurements, a capacitance diaphragm-based absolute pressure gauge is designed, developed, tested, and calibrated. The sensor is having electrode assembly which forms a dual capacitor with the gauge body. The two capacitances are used in post-processing to reduce the noise levels and to enhance the precision and accuracy of the measurements. The reference side is at high vacuum of the level 5 × 10-5 Pa. The vacuum of the reference side is generated using a Turbo Molecular Pump and is sustained by pinching-off the reference side at this vacuum. A getter pump is provided and energized for improving the vacuum which otherwise gets deteriorated due to outgassing in the reference region of the gauge. The fabrication methods adopted for fabricating the gauge are novel. The diaphragm is fabricated from bulk material using the electrical discharge method (EDM). This helped in achieving a perfect diaphragm with linear deflection with pressure variation and attained a 100% success rate. Unlike the fabrication by welding of plate, this method is robust, economical, and helped in achieving similar properties across the gauges. The second innovation is in the fabrication of electrode assembly. Unlike commonly used electrodeposited electrodes; the presented technique used copper plates which sandwich the Alumina dielectric. The plates are bolted/brazed/welded across the ceramic disc with the help of pins which also help in the parallel connection of the dual capacitors are described later. This made this method of fabrication largely rejection free with the potential of repairs and testing with different plate configurations. This paper is presenting the design, production, and calibration of the gauge using these fabrication techniques for 1 × 103 Pa to 1 × 105 Pa.
Implications of the steady-state assumption for the global vegetation carbon turnover
Authors: Fan Naixin , Santoro Maurizio , Besnard Simon , Cartus Oliver , Koirala Sujan , Carvalhais Nuno 
Published: September 2023

Abstract
Vegetation carbon turnover time (τ) is a central ecosystem property to quantify the global vegetation carbon dynamics. However, our understanding of vegetation dynamics is hampered by the lack of long-term observations of the changes in vegetation biomass. Here we challenge the steady state assumption of τ by using annual changes in vegetation biomass that derived from remote-sensing observations. We evaluate the changes in magnitude, spatial patterns, and uncertainties in vegetation carbon turnover times from 1992 to 2016. We found the robustness in the steady state assumption for forest ecosystems at large spatial scales, contrasting with local larger differences at the grid cell level between τ under steady state and τ under non-steady state conditions. The observation that terrestrial ecosystems are not in a steady state locally is deemed crucial when studying vegetation dynamics and the potential response of biomass to disturbance and climatic changes.
Extreme weather in a changing climate
Authors: Capua Giorgia Di , Rahmstorf Stefan 
Published: September 2023

Abstract
Extreme weather events are rising at a pace which exceeds expectations based on thermodynamic arguments only, changing the way we perceive our climate system and climate change issues. Every year, heatwaves, floods and wildfires, bring death and devastation worldwide, increasing the evidence about the role of anthropogenic climate change in the increase of extremes. In this viewpoint article, we summarize some of the most recent extremes and put them in the context of the most recent research on atmospheric and climate sciences, especially focusing on changes in thermodynamics and dynamics of the atmosphere. While some changes in extremes are to be expected and are clearly attributable to rising greenhouse gas emissions, other seem counterintuitive, highlighting the need for further research in the field. In this context, research on changes in atmospheric dynamics plays a crucial role in explaining some of these extremes and more needs to be done to improve our understanding of the physical mechanisms involved.
Regional sources control dust in the mountain critical zone of the Great Basin and Rocky Mountains, USA
Authors: Munroe Jeffrey S , Soderstrom Elsa J , Kluetmeier Camryn L , Tappa Michael J , Mallia Derek V , Bauer Ann M 
Published: September 2023

Abstract
Mountain environments are profoundly impacted by the deposition of mineral dust, yet the degree to which this material is far-traveled or intra-regional is typically unclear. This distinction is fundamental to model future changes in mountain geoecosystems resulting from climatic or anthropogenic forcing in dust source regions. We address this question with a network of 17 passive dust samplers installed in primarily mountain locations in Utah, Nevada, and Idaho between October, 2020 and October 2021. For each collector, the dust deposition rate was calculated, and the physical and chemical properties of the dust were constrained. Results were combined with backward trajectory modeling to identify the geologic characteristics of the area over which air passed most frequently in route to each collector (the ‘hot spot’). Dust properties differ significantly between collectors, hot spots for many collectors are spatially discrete, and the dominant geologies in the hot spots corresponding to each collector vary considerably. These results support the hypothesis that the majority of the dust deposited in the areas we studied is sourced from arid lowlands in the surrounding region.
Sub-seasonal to seasonal outlook of the 2022–23 southwestern Korea meteorological drought
Authors: Park Chang-Kyun , Lee Sangeun , Yoon Hyuncheol , Kam Jonghun 
Published: September 2023

Abstract
The southwestern Korean Peninsula had experienced cumulative precipitation deficits from the early spring of 2022, causing a severe meteorological drought in March 2023. As a growing season was forthcoming, the sub-seasonal to seasonal outlook of this ongoing drought came into question. This study aims to investigate a key driver of the ongoing drought and the required precipitation for its termination, and examine the sub-seasonal and seasonal outlooks of the ongoing drought via probabilistic and climate model-based forecasts. Results show a comparable contribution of springtime and summertime precipitation deficits in 2022, indicating that six-month accumulated precipitation deficit of 2022 was a key driver of the ongoing drought. We find that at least 80, 150, and 210 mm (170, 310, and 440 mm) of accumulated precipitation are required for the recovery (full recovery) in March, April, and May 2023, respectively. These required cumulative precipitation are found from 25% and 20% of empirical and dynamic precipitation forecasts, respectively. This study highlights the importance of the collaborative effort of national and local governments and stakeholders on mitigating negative impacts of the ongoing drought.
Holographic entanglement negativity for a single subsystem in conformal field theories with a conserved charge
Authors: Mondal Sayid , Paul Boudhayan , Sengupta Gautam , Sharma Punit 
Published: September 2023

Abstract
We utilize a holographic construction to compute the entanglement negativity for bipartite mixed state configurations of a single subsystem in CFTd
s with a conserved charge dual to bulk

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d

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1

geometries. In this context, we obtain the holographic entanglement negativity for single subsystems with long rectangular strip geometries in CFTd
s with a conserved charge dual to bulk non extremal and extremal Reissner–Nordström (RN)-

A
d

S

d
+
1

black holes at the leading order in a perturbation theory. We demonstrate that the holographic entanglement negativity computed involves the elimination of thermal contributions at the leading order confirming earlier results in the literature. This also conforms to quantum information theory expectations and constitutes further consistency checks for the holographic construction.
A Dirac-material-inspired non-linear electrodynamic model
Authors: Neves M J , Gaete Patricio , Ospedal L P R , Helayël-Neto J A 
Published: September 2023

Abstract
We propose and study the properties of a non-linear electrodynamics (ED) that emerges inspired on the physics of Dirac materials. This new electrodynamic model is an extension of the one-loop corrected non-linear effective Lagrangian computed in the work of Keser et al (2022 Phys. Rev. Lett.
128 066402). In the particular regime of a strong magnetic and a weak electric field, it reduces to the photonic non-linear model worked out by Keser et al (2022 Phys. Rev. Lett.
128 066402). We pursue our investigation of the proposed model by analyzing properties of the permittivity and permeability tensors, the energy–momentum tensor and wave propagation effects in presence of a uniform magnetic background. It is shown that the ED here presented exhibits the vacuum birefringence phenomenon. Subsequently, we calculate the lowest-order modifications to the interaction energy, considering still the presence of a uniform external magnetic field. Our analysis is carried out within the framework of the gauge-invariant but path-dependent variables formalism. The calculation reveals a screened Coulomb-like potential with an effective electric charge that runs with the external magnetic field but, as expected for Dirac-type materials, the screening disappears whenever the external magnetic field is switched off.