bluuebunny/crossref_metadata_2025_split huggingface dataset:
Coordinated control strategy for frequency support of wind farm augmented with energy storage system
Authors: Zhu Shaojie , Tao Yibin , Li Guanjun , Xu Zheng , Zhang Jianzhong 
Published: August 2024

Abstract
Owing to the uncontrollable and intermittent nature of wind resources, the frequency support capability of wind turbine generators has strong uncertainty. Employing energy storage systems could improve the frequency support capacity and stability of wind farms. This paper proposes a coordinated control strategy wherein wind power and energy storage collaboratively engage in frequency support operations. At the wind farm and energy storage level, the energy storage gives priority to providing the basic part of the incremental active power, and the wind turbine kinetic energy only takes the deficit. At the wind turbine level, the active power support capacity (APSC) of doubly fed induction generator (DFIG) units is proposed, based on which the coordinated control among wind turbines is designed. Simulation results are presented to validate the effectiveness of the proposed methodology.
The technology of virtual inertia control considering the state of charge of hybrid energy storage
Authors: Zhang Hua , Wang Xin , Wang Wei , Cui Yiqiong 
Published: August 2024

Abstract
There is an increasing amount of new energy power generation being applied in power systems. However, the new energy units have a weak inertia response capability. PV power and large-scale wind energy are linked to the grid, causing the power system’s inertia level to drop noticeably, which has a negative impact on the power system’s frequency stability. Based on this, this paper introduces the Hybrid Energy Storage System (HESS) made up of batteries and supercapacitors, beginning with the concept of power system inertia. The synchronous generator’s rotational kinetic energy is then coupled with the static energy stored in the energy storage device to give it a virtual rotational moment of inertia. Lastly, an analysis is conducted on the HESS’s virtual inertia control technology. Additionally, a sample analysis is performed. The virtual inertia of the HESS is suitably regulated to provide inertia support for the system based on the energy storage device’s state of charge.
Study on the effect of spray flow rate on pumped compressed air energy storage system
Authors: Yang Biao , Li Deyou , Fu Xiaolong , Wang Hongjie , Gong Ruzhi 
Published: August 2024

Abstract
Pumped compressed air energy storage technology can effectively promote the green transformation of energy structure. In this study, the effects of different spray flow rates on operational, energy, and exergy performance were analyzed and compared. It was found that as the spray flow rate increased, the variation of air temperature decreased significantly and the variation of water temperature increased slightly. The larger the spray flow rate is, the stronger the air-water heat transfer performance in the tank will be, and the higher the work consumption of the spraying device will be. When the spray flow rate increases, the air-water heat transfer performance is enhanced, and the power consumption of the spray device is higher. Therefore, when the spray flow rate increases, ηE
first increases and then decreases, and ηx
and ESD continuously increase.
Research on magnetic balance differential protection based on single-core phase-shifting transformer
Authors: Wu Jian , Xue Yushi , Shen You , Chen Lei , Kang Heng , Zheng Tao 
Published: August 2024

Abstract
As an efficient method for managing power flow, phase-shifting transformers have gained widespread applications in the operation of power systems. The protection of phase-shifting transformers is crucial. This paper focuses on the research of a 35kV single-core symmetric phase shifting transformer in a demonstration project. Utilizing the electromagnetic induction law, the operational characteristics of the transformer are analyzed, and the placement of the protection current transformer is determined to design a magnetic balance differential protection scheme. This scheme effectively covers interphase faults, winding lead faults, and interturn faults in the single-core phase-shifting transformer. Furthermore, a model of the single-core phase-shifting transformer is developed using the MATLAB/Simulink platform to verify the effectiveness of the proposed differential protection configuration scheme by simulating typical faults.
Design of a quick connection device for transformer respirator
Authors: Feng Shuo , Wang Yifei , Zhang Zhen , Zhang Yan 
Published: August 2024

Abstract
This article proposes a quick connection device for transformer respirators. The schemes are studied from four aspects: device structure, fastening method, material, and shock-absorbing spring. Through experimental comparison, suitable schemes for respirators are selected and physical objects are made. Finally, the effectiveness of the quick connect device is checked to verify its practicality and effectiveness.
Digital twins design for water cold plate using reduced order model
Authors: Degao Hou , Jiyu Qian , Tao Wei 
Published: August 2024

Abstract
Water cold plates are widely used for heat dissipation in electronic devices. The design of water cold plats includes fluid characterization, heat transfer analysis, and fluid-solid coupling analysis, which are mostly carried out by fluid or thermal design software simulation, resulting in low simulation efficiency. This paper proposes a water cold plate simulation method based on digital twins, which realizes the downgrading of the traditional 3D CFD simulation model to a 1D mathematical model (ROM) and greatly shortens the thermal simulation calculation time. Meanwhile, real-time mapping is established between the physical form of the cold plate and the digital twin model to visualize the traditional invisible and unmeasurable parameters. In addition, based on the external real-time measurement data, the digital twin ROM model is driven to perform calculations and output the results, thus realizing the thermal performance evaluation of the cold plate under various working conditions, which greatly improves the efficiency of thermal design and thermal simulation of electronic devices.
Improvement of the ZJ-17 machine’s separation device based on computational fluid dynamics
Authors: Yang Guanglu , Ding Meizhou , Li Chunguang , Lu Xiaoping , Zhang Jin , Li Yuliang , Zhang Dehai 
Published: August 2024

Abstract
The primary air stem wire separation device employed in the ZJ-17 machine features a single gas inlet, resulting in airflow instability upon entry into the cavity, leading to vortex formation and backflow. This instability adversely affects the separation efficiency of the primary air stem wire, causing significant weight discrepancies in individual cigarette production. By analyzing the stem separation device using Computational Fluid Dynamics (CFD) and conducting test verifications, the design of the primary air separator cavity is optimized, with the double arc guide rectifier identified as the final design solution. The results demonstrate that the optimized double arc-oriented rectifier device boasts a straightforward structure, ensuring stable and dependable operation. It effectively reduces the number of substandard products, enhances the neutrality and stability of cigarette weight, yields substantial economic benefits, and enhances the consistency of cigarette internal flavor absorption.
Geometric error compensation method of five-axis CNC machine tool based on improved genetic algorithm
Authors: Wei Jun , Jiang Lei , Liang Bin 
Published: August 2024

Abstract
A method for compensating geometric errors using an improved genetic algorithm is suggested to mitigate the impact of geometric errors on machining precision in machine tools. The initial step involves a study of the structural and geometric inaccuracies of the five-axis CNC machine tool. Subsequently, theoretical and actual kinematic models of the machine tool are formulated using the method of transformation through homogeneous coordinate matrices, and the overall positional error of the machine tool is determined. Then, the genetic algorithm is improved by narrowing the initial population range and changing the chromosome selection weight in the convergence range, leading to the implementation of error compensation calculations. Ultimately, the effectiveness of this approach is validated by simulating the manufacturing of three-dimensional curved parts in VERICUT.
Research on mechanical properties of lattice structure based on selective laser melting technology
Authors: Wu Ke , Huang Yinqi , Deng Fanghang , Cheng Ying 
Published: August 2024

Abstract
In this research, four lattice frameworks are characterized by different types and relative densities. Quasi-static uniaxial compression tests were performed on lattice structures, resulting in stress-strain curves for these structures while preserving the intended meaning. The findings indicate a reduction in the elastic modulus of the lattice structure from 180 GPa to below 150 MPa when compared to the solid metal structure. The yield strength and elastic modulus of the lattice structure were determined through curve analysis. The successful description of the relationship between the elastic modulus and the relative density of the lattice structure was accomplished through the utilization of the Gibson-Ashby model. The study reveals that its relative density and type primarily influence the strength of the lattice structure.
Controllable preparation of surface nanostructures on boron doped diamond by plasma etching
Authors: Li Xingyu , Ma Guanjie , Long Yuhao , Huang Jiangtao , Zhang Zongyan , Liu Fucheng , Han Peigang , He Bin 
Published: August 2024

Abstract
Due to the high hardness and chemical inertness of diamond, it is difficult to fabricate diamond nanostructures, especially with a high aspect ratio. Plasma etching is an attractive technology for processing diamonds due to its high anisotropic nature and fine controllability, which is of great significance to diamond machining and diamond device fabrication. In this paper, we fabricated large area and high aspect ratio diamond nanoneedle arrays on boron-doped diamond (BDD) by using a maskless inductively coupled plasma (ICP) etching process. The ICP etching was performed in hydrogen (H) and hydrogen/argon (H/Ar) plasma. Then, the influences of duration and pressure on the morphology of diamond nanostructures were studied, and the mechanism of formation of nanoneedle arrays was discussed. The research results show that ICP etching is a simple and efficient method for fabricating diamond nanostructures, which provides a promising way for the industrial fabrication of large-scale BDD nanostructures.
Study on the applicability of gasification coarse slag as admixture for cement-based materials
Authors: Li Haichao 
Published: August 2024

Abstract
To reduce the environmental risks caused by the accumulation of coarse slag and enhance its comprehensive utilization efficiency, this paper takes gasification coarse slag and cement as the main research objects and explores the optimal mix ratio of coarse slag in subgrade materials. By analyzing the fundamental physical and chemical properties of coarse slag and characterizing the hydration products and microstructure of the solidified slurry, the impact of coarse slag content on the strength characteristics of coarse slag-cement-based standard test blocks was investigated. The results showed that the main chemical components of the coarse slag were SiO2, Al2O3, and CaO, and the loss on ignition was 16.18%, which met the suitability requirements of the cement roadbed material. As the mixing ratio of coarse slag continues to increase, the water-cement ratio with fluidity ≥180 mm gradually increases, which would hinder the hydration process of the standard specimen, reduce the generation of hydration products such as C-S-H, destroy the dense structure of the aggregate, and reduce the material strength. When the content of gasified slag was about 15% to 20%, the structure became dense, and the strength of the coarse slag-cement-based material was higher after 28 days of hydration, which was more suitable for engineering applications.
Development of high-level applications for High Energy Photon Source booster
Authors: Peng Yuemei , Ji Daheng , Ji Hongfei , Li Nan , Lu Xiaohan , Tian Saike , Wei Yuanyuan , Xu Haisheng , Zhao Yaliang , Jiao Yi , Li Jingyi 
Published: August 2024

Abstract
The High Energy Photon Source (HEPS), is the first
fourth-generation storage ring light source being built in the
suburb of Beijing, China. The storage ring was designed with the
emittance lower than 60 pm.rad with a circumference of 1.36 km and
beam energy of 6 GeV. Its injector contains a 500 MeV S-band
Linac and a 454 m booster which was designed as an accumulator at
the extraction energy. In the energy ramping control design of HEPS
booster, the ramping process was programed to be able to stop and
stay at any energy between the injection energy and the extraction
energy. This feature enables us to conduct energy-dependent machine
studies and ramping curve optimization. The beam commissioning of
HEPS Linac finished in June, 2023. And the beam commissioning of
booster started in the end of July, 2023. In November 17, main
target values proposed in the preliminary design report has been
reached. The high-level applications (HLAs) are essential tools for
beam commissioning. The development of HLAs, which are based on the
framework named Python accelerator physics application set
(Pyapas), started in the end of 2021. The HEPS physics team
spent more than one year to develop and test the HLAs to meet the
requirements of beam commissioning of the booster. Thanks to the
modular design, the principle based on physical quantities, and the
ability of running simulation models online from the Pyapas,
the development efficiency and reliability of the HLAs have been
greatly improved. In particular, the principle based on physical
quantities allows us to control the beam more intuitively.
Dynamic remodeling model based on chemotaxis of slime molds
Authors: Uza Megumi , Kunita Itsuki 
Published: August 2024

Abstract
Social infrastructure networks, essential for daily life and economic activities, encompass utilities such as water, electricity, roads, and telecommunications. Dynamic remodeling of these systems is crucial for responding to continuous changes, unexpected events, and increased demand. This study proposes a new dynamic remodeling model inspired by biological mechanisms, focusing on a model based on the chemotaxis of slime molds. Slime molds adapt spontaneously to environmental changes by remodeling through the growth and degeneration of tubes. This capability can be applied to optimizing and dynamic remodeling social infrastructure networks. This study elucidated the chemotactic response characteristics of slime molds using biological experiments. The mold’s response was observed by considering changes in the concentration of chemicals as environmental changes, confirming that slime molds adapt to environmental changes by shortening their periodic cycles. Subsequently, based on this dynamic response, we propose a new dynamic model (oscillated Physarum solver, O-PS) that extends the existing Physarum solver (PS). Numerical simulations demonstrated that the O-PS possesses rapid and efficient path-remodeling capabilities. In particular, within a simplified maze network, the O-PS was confirmed to have the same shortest-path searching ability as the PS, while being capable of faster remodeling. This study offers a new approach for optimizing and dynamically remodeling social infrastructure networks by mimicking biological mechanisms, enabling the rapid identification of solutions considering multiple objectives under complex constraints. Furthermore, the variation in convergence speed with oscillation frequency in the O-PS suggests flexibility in responding to environmental changes. Further research is required to develop more effective remodeling strategies.
Healthy eating in globalized food environments: market access and consumer behavior in the Galápagos Islands of Ecuador
Authors: Nicholas Khristopher M , Bentley Margaret E , Terán Enrique , Thompson Amanda L 
Published: August 2024

Abstract
Food environments are the interface between food systems and consumers. Although market access contributes to diet intake, consumer behavior determines food acquisition practices yet is often neglected in food environment research. Implementing sustainable food system transformations in climate-vulnerable, trade-dependent settings requires effective integration of both geographic and experienced-based measures of access. This study in the Galápagos Islands (i) develops measures for geographic and experience-based food environments (EFEs) and (ii) links diet outcomes to these food environment measures independently and when interacted. Cross-sectional household data including diet recalls come from 388 participants in the Healthy Family Study from San Cristóbal Island, Galápagos in 2018. Geocoded market inventory and price data were obtained in 2018 using the Nutritional Environment Measurement Survey for Stores (n = 60). Geographic food environments were created from market scores and distribution. EFEs were based on factor analyzed consumer behavior strategies. Diet quality was defined using the global dietary recommendations score. Adjusted linear regressions tested the relationships between diet and food environment measures and included sociodemographic covariates. Interactions between geographic and EFEs were tested. This study showed that higher prioritization of convenience when food shopping was associated with lower healthy food intake. However, the relationship between food environment measures and diet is strongly modified by consumer behavior. For convenience-prioritizing households, the nearest market proved most associated with healthy diet outcomes. For households with a food-driven purchasing strategy, the preferred market was most associated with healthy diet outcomes. These findings show that market inventory can be healthful or deleterious to diets, depending on how individuals navigate their food environments. Empirical measures of food access that neglect to consider consumer behavior may fail to capture realistic representations of food environment and diet relationships. These findings underscore the importance of tailoring food system changes to incorporate context-specific consumer behavior.
Linkage of El Niño-Southern Oscillation to astronomic forcing
Authors: Valle-Levinson Arnoldo 
Published: August 2024

Abstract
Deciphering the causes of El Niño-Southern Oscillation (ENSO) represents one of the greatest scientific and societal challenges because ENSO impacts people’s safety, food, water, health, and economy. Traditionally, ENSO has been considered a phenomenon that is mostly influenced by the interactions between oceanic and atmospheric processes, i.e. by the internal variability in Earth’s ocean-atmosphere system. However, dendrochronological records of climate indices, ENSO among them, have statistically significant variance at periodicities related to solar activity (sunspots) and lunar precessions. Other studies indicate a modulation by the lunar nodal cycle of ocean’s mixing and its implications on water and air temperatures, steric sea levels, coastal flooding, rain, river discharge and heat transport. Those findings suggest that astronomic forces may influence ENSO. In fact, this study shows that a fit to well-established periodicities from lunar precessions, solar activity and their interactions explains 91% of the variance of an ENSO index smoothed at 5 years, and 67% of a 3 yr filtered ENSO index. Provided that the future Earth’s ocean-atmospheric system remains roughly within historical bounds under a changing climate in the next 2–3 decades, one can venture a projection into the future of 3- and 5 yr smoothed ENSO variability. Such projection is given here and might help in preparations for adaptation and mitigation measures caused by ENSO-related coastal hazards.
Socio-environmental impacts of mineral mining and conflicts in Southern and West Africa: navigating reflexive governance for environmental justice
Authors: Leonard Llewellyn 
Published: August 2024

Abstract
Mineral mining activities in Africa have long been associated with a myriad of socio-environmental impacts and conflicts, posing significant challenges to sustainable development and environmental justice. This paper explores the complex interplay between mineral mining, socio-environmental impacts, and conflicts in the Southern and West African region, with a focus on the imperative of reflexive governance for achieving just transitions and environmental justice. Drawing on a comprehensive literature review and cases from Southern and Western African countries, this paper examines the multifaceted nature of socio-environmental impacts resulting from mineral mining. These impacts encompass ecological degradation and social inequalities, among others. Furthermore, the paper delves into the dynamics of conflicts arising from mineral mining and competing interests such as natural resources and land rights. Additionally, the paper examines governance structures aimed at enhancing transparency, accountability, and environmental sustainability. The paper concludes by highlighting the implications of reflexive governance as a transformative tool for addressing the socio-environmental impacts of mineral mining and conflicts in Southern and West Africa. It underscores the urgency of adopting holistic and integrated approaches that prioritize environmental protection, social equity, and community well-being in the context of mineral resource extraction. The African Union can serve as the catalyst for reflexive governance and environmental justice in mineral resource extraction, with citizens also holding national governments accountable.