bluuebunny/crossref_metadata_2025_split huggingface dataset:
The research of declared primary frequency capacity and control strategy for electrical fused magnesium furnace load
Authors: Jia Yilin , Hao Rui , Guo Litao , Gao Lei , Sun Yongchao , Li Weidong 
Published: September 2023

Abstract
As a potential control resource of the load side, fused magnesium load can effectively make up for the loss of the primary frequency modulation capacity of the system, in which the conventional units are replaced by new energy sources. However, the capacity of fused magnesium load is closely related to the operating condition and changes dynamically. It is necessary to accurately characterize its capacity and determine the optimal declared capacity of participating in frequency modulation service. According to the technical regulations of primary frequency modulation service, the basic principle is presented, which the electric molten magnesium load participates in primary frequency modulation control in the case of lack of large power. Considering the risk of reward and punishment, the optimal reporting capacity optimization model is constructed. Taking the year as the time scale, a stochastic production simulation method involving primary frequency modulation was proposed. According to its operating characteristics, a real-time control strategy involving primary frequency modulation is designed. Simulation examples show that the proposed method can accurately simulate the production process of molten magnesium load, reasonably realize the operation control of molten magnesium load, and optimize the declared capacity considering the risk.
Low-carbon Economic Scheduling of Combined Cooling, Heating and Power Microgrid Considering Demand Response and Shared Energy Storage
Authors: Wu Na , Yan Jingrui , Fan Shuxian , Hu Songge 
Published: September 2023

Abstract
In order to further promote the new energy consumption of combined cooling, heating, and power (CCHP) microgrid, reduce carbon emissions, and optimize the total operating cost of the microgrid, a low-carbon optimal scheduling model of CCHP microgrid was proposed. It considered demand response (DR) and shared energy storage (SES). Firstly, the concept of SES and its operation mode are applied to the microgrid. Secondly, in order to take advantage of the flexible nature of multiple loads, an integrated demand response (IDR) model with a ladder subsidy mechanism was established. Then, the optimal scheduling model introduces a reward and punishment ladder carbon trading mechanism (RPL-CTM). Finally, taking energy purchase cost, load reduction subsidy cost, interaction cost with energy storage station, carbon trading cost, and wind abandoning penalty cost as optimization objectives, a multi-energy coupling, and multi-objective collaborative optimization scheduling model was established. Numerical analysis indicates that the model can efficiently lower the microgrid’s operating cost and encourage the use of clean energy and carbon emission reduction.
Lithium Titanate battery-based frequency modulation control strategy for doubly fed induction generator
Authors: Tian Yuting , Wei Wei , Sun Xiwei , Li Xiaozhu 
Published: September 2023

Abstract
This paper proposes a Lithium Titanate battery-based primary frequency regulation strategy for doubly fed induction generators to solve the problems of a decrease in power generation efficiency and an increase in turbine losses under a traditional over-speed load shedding control strategy. A stator voltage orientation-based dual closed-loop control strategy for the vector control system is designed for the PWM rotor converter. A grid voltage-oriented vector control is adopted for the grid converter to maintain the stability of DC bus voltage. To enable a single doubly fed induction generator to have primary frequency regulation capability, a dual Lithium Titanate energy storage device is installed on the DC bus to improve the power generation efficiency of the unit. Modeling and analysis on Matlab/Simulink to verify that the proposed control strategy not only ensures the economic benefits of the generator’s electricity but also enables the generator to have good frequency regulation capability.
Transmission line icing thickness prediction model based on ISSA-CNN-LSTM
Authors: Han Zilong , Lv Hongtu , Liang Zhengding , Yi Jinqiao 
Published: September 2023

Abstract
The prediction of transmission line ice cover thickness can effectively guide the scientific operation and maintenance of the power sector. An improved sparrow search algorithm, convolutional neural network and long short-term memory fusion ice cover prediction model is proposed in this paper. Environmental temperature, humidity, wind speed and other data are firstly normalised, CNN is used to both learn the data signature as well as input the results into LSTM, and then ISSA is used to optimise the parameters of LSTM such as the numeration of the neuron, the initial learning rate, and the regularisation coefficient, etc., and then the final output is the predicted value of the icing thickness of the transmission line cover. The simulation results show that the MSE and MAE of the ISSA-CNN-LSTM model are 0.23 and 0.37, respectively, which are much better than the prediction results of the SSA and CNN models.
Preparation of lithium-containing magnesium phosphate-based composite ceramics having high compressive strength, osteostimulation and proangiogenic effects
Authors: He Fupo , Yuan Xinyuan , Fu Wenhao , Huang Wenhao , Chen Tengyun , Feng Songheng , Wang Huaiyu , Ye Jiandong 
Published: September 2023

Abstract
Fairly high concentrations of magnesium and lithium are conducive to improving the osteogenic and angiogenic capacities. In the current study, lithium-containing magnesium phosphate-based ceramics (AMP/LMPGs) were prepared from amorphous magnesium phosphate (AMP) at a low sintering temperature (650 °C), and the lithium/magnesium-containing phosphate glasses (LMPGs) were utilized as sintering additives. During the sintering procedure of AMP/LMPGs, the AMP reacted with LMPGs, producing new compounds. The AMP/LMPGs displayed nano-size grains and plentiful micropores. The addition of LMPGs noticeably increased the porosity as well as compressive strength of the AMP/LMPGs ceramics. The AMP/LMPGs sustainedly released Mg, P and Li ions, forming Mg-rich ionic microenvironment, which ameliorated cellular proliferation, osteogenic differentiation and proangiogenic capacities. The AMP/LMPGs ceramics with considerably high compressive strength, osteostimulation and proangiogenic effects were expected to efficiently regenerate the bone defects.
Underestimated ammonia vehicular emissions in metropolitan city revealed by on-road mobile measurement
Authors: Gu Chuanqi , Wang Shanshan , Zhu Jian , Dai Wenhao , Liu Jiaqi , Xue Ruibin , Che Xiang , Lin Yanfen , Duan Yusen , Wenig Mark O , Zhou Bin 
Published: September 2023

Abstract
Atmospheric ammonia (NH3) plays a significant role in the nitrogen cycle, and can have impacts on air quality, ecological balance and climate change. While NH3 associated with natural and agricultural processes has long been considered the primary source, the contribution of combustion-related NH3, particularly from vehicular emissions, keeps on the rise. We found that high on-road NH3 concentrations occurred in a metropolitan city based on mobile measurement, and inferred that urban vehicular NH3 emission was likely underestimated in the past. NH3 emission factors (EFs) were derived from ring roads and tunnels, showing levels 74% and 20% higher than the latest standard proposed by Euro VII, respectively. To quantify the underestimation, two methods based on car ownership and traffic flow were used to estimate the annual vehicular NH3 emission in Shanghai as 2.59 and 1.76 Gg, respectively, substantially surpassing the predicted results by the Dynamic Projection model for Emissions in China. Given these discoveries, we recommend that it is urgent and imperative to establish relevant national standards and limits aiming at regulation on vehicular NH3 emissions. And more representative EFs measurements should be adopted to improve the accuracy of inventory estimation.
Screening induced crossover between phonon- and plasmon-mediated pairing in layered superconductors
Authors: in’t Veld Y , Katsnelson M I , Millis A J , Rösner M 
Published: September 2023

Abstract
Two-dimensional (2D) metals can host gapless plasmonic excitations that strongly couple to electrons and thus may significantly affect superconductivity. To investigate the dynamical interplay of the electron–electron and electron–phonon interactions in the theory of 2D superconductivity, we apply a full momentum- and frequency-dependent one-loop theory treating electron–phonon, electron–plasmon, and phonon–plasmon coupling with the same accuracy. We tune the strength of the Coulomb interaction by varying the external screening

ε

e
x
t

to the layered superconductor and find three distinct regions. At weak screening, superconductivity is mediated by plasmons. In the opposite limit conventional electron–phonon interactions dominate. In between, we find a suppressed superconducting state. Our results show that even in conventional electron–phonon coupled layered materials, superconductivity can be significantly enhanced by the electron–plasmon coupling in a manner that can be controlled by the external screening.
Band type engineering using different stacking configurations of anisotropic and isotropic monolayer transition metal dichalcogenides
Authors: Polumati Gowtham , Muñiz Martínez Barbara A , Kolli Chandra Sekhar Reddy , Selamneni Venkatarao , Flores Salazar Mario , Sanchez David Emanuel , Carreno Andres Fest , Terrones Mauricio , De Luna Bugallo Andres , Sahatiya Parikshit 
Published: September 2023

Abstract
This work demonstrates the band-type engineering and the detailed charge transport mechanism upon visible light illumination for various configurations of vertically stacked monolayers of MoS2-ReS2 grown by a two-step chemical vapour deposition method. In order to understand the stacking order of both materials has a direct impact on the band alignment arrangements, we investigate the optical properties of both ReS2–MoS2 stacking configurations using micro-photoluminescence and interestingly observed the change in the band alignment upon changing the stacking order (ReS2–MoS2 and MoS2–ReS2). The formation of the vertically stacked heterostructure is further validated by observing its morphology by HR-TEM. The MoS2 on top of ReS2 yielded Type II and ReS2 on top of MoS2 yielded type I band alignment. The fabricated photodetector exhibits responsivities of 152 A W−1 for pristine ReS2, 72 A W−1 for MoS2 on top, and 400 A W−1 for ReS2 on top respectively for visible light illumination of 554 nm suggesting that the stacking configuration of the monolayer TMDs play a vital role in the performance of the optoelectronic properties. The detailed study of such configurations of vertically stacked 2D heterostructure is essential to better understand the optimal configuration for the development of highly responsive photodetectors.
Analysis of the properties of recycled aggregates concrete with lime and metakaolin
Authors: Verma Manvendra , Chouksey Arti , Meena Rahul Kumar , Singh Indrajeet 
Published: September 2023

Abstract
In recent years, the use of alternative materials in cementitious systems has attracted considerable interest due to their potential for augmenting the durability and performance of concrete. This research is investigating the use of three such materials as partial cement replacements in concrete: Recycled Concrete Aggregate (RCA), Limestone, and Metakaolin. RCA is a byproduct of the demolition of concrete structures that can be recycled as aggregate. Incorporating RCA into concrete reduces the environmental impact of waste disposal and reduces the carbon burden. Due to its pozzolanic properties, limestone, a sedimentary rock composed primarily of calcium carbonate, can be used as a substitute for cement. By substituting a portion of cement with limestone, the cement manufacturing process can substantially reduce carbon dioxide emissions. Metakaolin, a thermally treated form of kaolin clay, is yet another alternative material with pozzolanic properties. When used as a partial cement replacement, metakaolin increases the concrete’s strength, durability, and chemical resistance. It also contributes to lowering hydration heat and mitigating alkali-silica reactions, thereby enhancing the durability of concrete structures. In this investigation, cement is replaced by limestone powder which is varied from 0% to 50% and the addition of metakaolin of 20% in every mix design. RCA is also incorporated in the mix design as a replacement for coarse aggregate by 20%. In the experimental investigation, various tests were conducted on each mix slump test, density, compressive strength, sulphate attack, mass loss, x-ray diffraction (XRD), and scanning electron microscope (SEM). After the investigation, the compressive strength improved by 15.07%, when metakaolin was added, and when LS was used to replace 10% of the cement, the compressive strength increased by 13.49%. The features of the combinations were negatively impacted when more cement was substituted. Following an investigation of hydration products, filler and dilution effects were found, both of which have the potential to be connected to improved mix quality. A mix that contains 20% metakaolin and 10% limestone powder may be considered the ideal mix owing to its superior strength and sulphate resistance when compared to normal concrete. It consists of less effect on slump value and density, the compressive strength was increased, and minimum mass loss after the sulphate attack. M3 mix best performer among all mix designs. It shows that the mix design with 20% metakaolin and 10% limestone powder is best-suitable for future recommendations.
Lead-free perovskites InSnX3(X = Cl, Br, I) for solar cell applications: a DFT study on the mechanical, optoelectronic, and thermoelectric properties
Authors: Pingak Redi Kristian , Harbi Amine , Moutaabbid Mohammed , Johannes Albert Zicko , Hauwali Nikodemus Umbu Janga , Bukit Minsyahril , Nitti Fidelis , Ndii Meksianis Zadrak 
Published: September 2023

AbstractThis study aims to explore for the first time the mechanical, electronic, optical and thermoelectric properties of cubic lead-free perovskites InSnBr3and InSnI3to investigate their potential applications in solar cell devices. Additionally, the previously examined InSnCl3perovskite is also included. The properties of the perovskites were determined using first-principles calculation based on the well-known Density Functional Theory (DFT) with the Generalized Gradient Approximation (GGA) functional implemented in the Quantum Espresso package. One of the most important findings was that the bandgaps of the compounds decrease and undergo an indirect-to-direct bandgap transition when Cl is replaced by Br and I. This indicates that InSnBr3and InSnI3perovskites are more suitable for solar cell applications. The bandgap energies for InSnCl3, InSnBr3, and InSnI3perovskites are 0.59 eV (R→X), 0.44 eV (R→R), and 0.24 eV (R→R), respectively. The improved band gaps using the HSE06 functional are 2.35 eV, 2.13 eV, and 2.01 eV for the respective perovskites. The materials were found to possess chemical, mechanical, and thermodynamic stability as well as ductile behaviour. Furthermore, the materials exhibit remarkable optical properties, including high absorption coefficients and relatively small reflectivity. The calculated thermoelectric properties indicated high electrical conductivity and reasonable figure of merit values, making them promising candidates for the application in thermoelectric devices.
Impact of parasitic elements on the power dissipation of Si superjunction MOSFETs, SiC MOSFETs, and GaN HEMTs
Authors: Joshi Vikas , Pande Peyush , Jadli Utkarsh , Chaturvedi Mayank , Nautiyal Priyanka 
Published: September 2023

Abstract
In power conversion systems, where higher switching frequencies are required for miniaturization, the selection of power switches with lower power loss becomes essential for achieving better efficiency. At higher switching frequencies, the parasitic elements of the power switch largely dictate the efficiency of the power electronic system. Hence, it becomes critical to investigate the impact of parasitic losses on overall efficiency. The parasitic components of the power transistor vary with the semiconductor technology and thus effects the power converter system differently. This paper compares three power switch technologies: Silicon (Si) based Superjunction (SJ) power MOSFET, Silicon Carbide (SiC) based power MOSFET, and Gallium Nitride (GaN) based HEMT, for three different voltage ratings: 650 V, 900 V, and 1200 V. The effect of the parasitic components on the converter efficiency has been demonstrated using an inductive clamped loading circuit implemented in LTSPICE. The results demonstrate that at a frequency of 200 kHz, the total power loss for 650 V power switches was 44 W, 108 W, and 127 W for GaN, SiC, and SJ, respectively. At 500 kHz, the total power loss for 1200 V power switches was 622 W and 720 W for GaN and SiC, respectively. Overall, the GaN technology provides lower power losses than SiC and SJ due to lower parasitic capacitance and on-resistance, indicating the potential of GaN power devices for higher voltage applications. This comparison enables a power engineer to select an appropriate power switch that ensures the best possible efficiency for a specific application.
On the enhanced mechanical characteristics of 3D printed architected spiderweb lattice structures through overall density variation
Authors: Kumar Ravi , Sarangi Saroj Kumar 
Published: September 2023

Abstract
This paper presents the performance analysis of 3D printed architected spiderweb lattice structures. The research is aimed to provide suitable lattice configuration to be useful for customized foot insole applications. First the architected spiderweb lattice structures comprising of hexagonal networks consisting of struts and nodes are designed. Then 3D printing of these structures is carried out and for this purpose two different materials such as Thermoplastic polyurethane (TPU) and ABS-like resin are considered. Quasi-static compression tests are performed, and simulation analyses are conducted in ANSYS to explore the influence of relative density over the energy absorption capacity of the lattice structures. It is observed that an increase in relative density of 0.2 provides a substantial increase in energy absorbing capacity and strength of the lattice configurations. This increase in relative density by 0.2 led to a 6-fold increase in energy absorption capacity with a 4.5-fold augmentation in strength for TPU lattice structure, and a 7-fold augmentation in energy absorption capacity with 3.5-fold increase in strength for ABS-like resin lattice structure. These results suggest that increasing the relative density of these materials can be a viable strategy for enhancing their mechanical properties, which can have significant implications for different industrial and engineering fields. The enhanced energy absorbing characteristics of this presently developed lattice structures with such materials can make them suitable for foot insole applications.
IX—How Is Metaphysics Possible?
Authors: Stang Nicholas F 
Published: September 2023

Abstract
In the Introduction to the Critique of Pure Reason Kant raises a famous question: how is metaphysics possible as a science? Kant posed this question for his predecessors in early modern philosophy. I raise this question anew for the resurgence of metaphysics within analytic philosophy. I begin by dividing the question of the possibility of metaphysics into separate questions about its semantic and epistemic possibility, and translate them into contemporary terms as: (1) Why do terms in metaphysical theories refer? (2) How do we have knowledge in metaphysics? I then argue that the inflationary conception of metaphysics cannot explain the semantic possibility of metaphysics and, consequently, cannot explain its epistemic possibility. I then argue, more briefly, that a deflationary conception cannot satisfactorily answer the Kantian questions either. The critical path alone remains open.
Investigating energy policies to boost grid-connected rooftop solar PV in Sudan
Authors: Ahmed Tarig Z , Mohamed Ayah , Ahmed Mawahib Eltayeb , Abdalgader Ahmed Osman Elamin , Hassan-Sayed Mohamed G 
Published: September 2023

Abstract
Grid-connected rooftop solar photovoltaic (PV) systems can reduce the energy demand from the grid and significantly increase the power available to it. However, rooftop solar PV has not yet been widely adopted in many sub-Saharan African countries, such as Sudan, although they are endowed with high solar radiation and in dire need of additional power. This paper investigates risks and policies to increase grid-connected rooftop solar PV adoption in Sudan. A simplified United Nations Development Program Derisking Renewable Energy Investment framework is adopted to investigate this over three stages. For Stage 1, a list of risks and barriers was produced based on a literature review of solar PV studies in Sudan and interviews with nine stakeholders. Affordability was the risk most often mentioned (eight times from nine interviewees), followed by concerns about poor utility grid infrastructure. For Stage 2, policy de-risking instruments and financial de-risking instruments were listed to overcome the barriers. These include the introduction of net metering, the use of a third-party organization to monitor policy implementation, upgrade of the grid infrastructure, public awareness campaigns and energy-saving schemes. For Stage 3, the levelized cost of electricity was estimated for a typical 2-kW rooftop PV system without policies (0.11 $/kWh) and with a net-metering policy (0.07 $/kWh).
Reorganization of the structural connectome during vision recovery in pituitary adenoma patients post-transsphenoidal surgery
Authors: Zhao Kai , Liu Minghang , Yang Fuxing , Shu Xujun , Sun Guochen , Liu Ruoyu , Zhao Yue , Wang Fuyu , Xu Bainan 
Published: September 2023

Abstract
Pituitary adenomas (PAs) can exert pressure on the optic apparatus, leading to visual impairment. A subset of patients may observe a swift improvement in their vision following surgery. Nevertheless, the alterations in the structural connectome during the early postoperative period remain largely unexplored. The research employed probabilistic tractography, graph theoretical analysis, and statistical methods on preoperative and postoperative structural magnetic resonance imaging and diffusion tensor images from 13 PA patients. Postoperative analysis revealed an increase in global and local efficiency, signifying improved network capacity for parallel information transfer and fault tolerance, respectively. Enhanced clustering coefficient and reduced shortest path length were also observed, suggesting a more regular network organization and shortened communication steps within the brain network. Furthermore, alterations in node graphical properties were detected, implying a restructuring of the network’s control points, possibly contributing to more efficient visual processing. These findings propose that rapid vision recovery post-surgery may be associated with significant reorganization of the brain’s structural connectome, enhancing the efficiency and adaptability of the network, thereby facilitating improved visual processing.