AIP Advances最新文献

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Toward a renewable future: Attaining 100% renewable electricity generation through sustainable transition 迈向可再生的未来:通过可持续转型实现 100% 可再生能源发电
IF 1.6 4区 物理与天体物理
AIP Advances Pub Date : 2024-08-29 DOI: 10.1063/5.0208838
Rohan Kumar, Muhammad Asim, Ammara Kanwal, Muhammad Jawad, Mohsin Pervez
{"title":"Toward a renewable future: Attaining 100% renewable electricity generation through sustainable transition","authors":"Rohan Kumar, Muhammad Asim, Ammara Kanwal, Muhammad Jawad, Mohsin Pervez","doi":"10.1063/5.0208838","DOIUrl":"https://doi.org/10.1063/5.0208838","url":null,"abstract":"Despite efforts made over the past two decades, Pakistan continues to face electricity crises. The heavy reliance on fossil fuels, which make up 60% of the country’s energy mix, has raised concerns about energy security and environmental degradation due to greenhouse gas (GHG) emissions. Developing effective electricity generation scenarios has been challenging for policymakers and researchers, despite the steady increase in electricity demand. The LEAP software was used in this study to forecast the country’s power demand, and four supply-side scenarios were constructed and examined for the years 2018 through 2040. These scenarios include a baseline scenario, a renewable energy scenario, a more renewable energy scenario, and a near-zero emission scenario, focusing on electricity generation and carbon emissions. The study’s findings, projecting into 2040, indicate that the renewable energy scenarios are environmentally sustainable, with lower GHG emissions compared to the baseline scenario. According to the findings of this study, it is projected that around 615 TWh (terawatt-hours) of renewable energy and nuclear energy will be necessary by the year 2040. The anticipated contributions include 393 TWh from hydroelectric energy, 57 TWh from wind energy, 41 TWh from solar energy, and 62 TWh from other renewable sources. The surge in renewable energy is forecasted to bring near-zero CO2 emissions by 2040, a pivotal step toward a sustainable energy future. A projected energy generation of 615 TWh is expected, which adequately meets the country’s energy demand. Transition to renewable energy is critical for addressing Pakistan’s increasing electricity demands, emphasizing both energy security and environmental sustainability.","PeriodicalId":7619,"journal":{"name":"AIP Advances","volume":null,"pages":null},"PeriodicalIF":1.6,"publicationDate":"2024-08-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142185423","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Current-induced domain wall motion driven by spin–orbit torque and Dzyaloshinskii–Moriya interaction in Pt/GdFeCo and Rh/GdFeCo wires Pt/GdFeCo 和 Rh/GdFeCo 金属丝中由自旋轨道力矩和 Dzyaloshinskii-Moriya 相互作用驱动的电流诱导畴壁运动
IF 1.6 4区 物理与天体物理
AIP Advances Pub Date : 2024-08-29 DOI: 10.1063/5.0210487
Pham Van Thach, Satoshi Sumi, Kenji Tanabe, Hiroyuki Awano
{"title":"Current-induced domain wall motion driven by spin–orbit torque and Dzyaloshinskii–Moriya interaction in Pt/GdFeCo and Rh/GdFeCo wires","authors":"Pham Van Thach, Satoshi Sumi, Kenji Tanabe, Hiroyuki Awano","doi":"10.1063/5.0210487","DOIUrl":"https://doi.org/10.1063/5.0210487","url":null,"abstract":"We investigated current-induced domain wall motion (CIDWM) driven by spin–orbit torque and Dzyaloshinskii–Moriya interaction (DMI) in ferrimagnetic Pt/GdFeCo/SiN and Rh/GdFeCo/SiN wires with perpendicular magnetic anisotropy at room temperature. We found that CIDWM in the Pt/GdFeCo wire exhibits nearly two times smaller in critical current density and about four times larger in DW mobility compared to the Rh/GdFeCo wire. By measuring the CIDWM under a longitudinal in-plane magnetic field, the DMI constant (D) was estimated for both wires. The estimated value of D for the Pt/GdFeCo wire is approximately seven times larger than the Rh/GdFeCo wire. It indicated that the Pt/GdFeCo wire revealed the CIDWM with much higher efficiency, mainly attributed to the much larger DMI, which may come from significantly stronger interfacial heavy metal/ferrimagnet hybridization in the Pt/GdFeCo wire.","PeriodicalId":7619,"journal":{"name":"AIP Advances","volume":null,"pages":null},"PeriodicalIF":1.6,"publicationDate":"2024-08-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142224312","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Multiple dynamic modes of Bicoid morphogen gradient are explained by a quantum-classical model 量子经典模型可解释双核形态发生梯度的多种动态模式
IF 1.6 4区 物理与天体物理
AIP Advances Pub Date : 2024-08-29 DOI: 10.1063/5.0221207
Irfan Lone, Carl O. Trindle
{"title":"Multiple dynamic modes of Bicoid morphogen gradient are explained by a quantum-classical model","authors":"Irfan Lone, Carl O. Trindle","doi":"10.1063/5.0221207","DOIUrl":"https://doi.org/10.1063/5.0221207","url":null,"abstract":"Extracellular diffusion coupled with degradation is considered a dominant mechanism behind the establishment of morphogen gradients. However, the fundamental nature of these biophysical processes, visa viz, the Bicoid (Bcd) morphogen gradient, remains unclear. Fluorescence correlation spectroscopy has recently revealed multiple modes of Bcd transport at different spatial and temporal locations across the embryo. Here, we show that these observations are best fitted by a model fundamentally based on quantum mechanics. It is thus hypothesized that the transient quantum coherences in collaboration with unitary noise are responsible for the observed dynamics and relaxation to a non-equilibrium steady-state of the Bcd morphogen gradient. Furthermore, simulating the associated probability distribution for the model shows that the observed non-zero concentration of the Bcd molecules in the posterior-most parts of the embryo is a result of non-Gaussian distribution characteristic to quantum evolution. We conclude that with the Bcd gradient being essentially a one-dimensional problem, a simple one-dimensional model suffices for its analysis.","PeriodicalId":7619,"journal":{"name":"AIP Advances","volume":null,"pages":null},"PeriodicalIF":1.6,"publicationDate":"2024-08-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142224311","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Investigation on materials removal rate and surface roughness of temperature resisted Waspaloy during electric spark machining utilizing gray relational analysis 利用灰色关系分析法研究电火花加工过程中抗温型 Waspaloy 的材料去除率和表面粗糙度
IF 1.6 4区 物理与天体物理
AIP Advances Pub Date : 2024-08-29 DOI: 10.1063/5.0220951
G. Veerappan, Kamaraj Logesh, V. Mohanavel, M. Ravichandran, Ahmed Ahmed Ibrahim, Salahuddin Khan, S. Suresh Kumar, Sathish Kannan, Jayant Giri
{"title":"Investigation on materials removal rate and surface roughness of temperature resisted Waspaloy during electric spark machining utilizing gray relational analysis","authors":"G. Veerappan, Kamaraj Logesh, V. Mohanavel, M. Ravichandran, Ahmed Ahmed Ibrahim, Salahuddin Khan, S. Suresh Kumar, Sathish Kannan, Jayant Giri","doi":"10.1063/5.0220951","DOIUrl":"https://doi.org/10.1063/5.0220951","url":null,"abstract":"Waspaloy, a nickel-based super alloy, has much potential in gas turbine component production. Machining this type of material using the traditional manufacturing method is very hard. Hence, electrical discharge machining (EDM) was selected for the investigation of the machining characteristics of Waspaloy by choosing the control parameters, namely, current, voltage, pulse on time, pulse off time, and spark gap. Gray relational analysis is carried out using 18 experiments according to an orthogonal array (L18) to determine the gray relation grade for this machining process with multiple machining characteristics such as material removal rate (MR), tool wear rate (TW), and surface roughness (SR). The significant objective of the multi objective optimization to attain high MR, low TW, and low SR is found out. From gray relation optimization, the optimum machining conditions for EDM, namely, current: 26 A, voltage: 200 V, pulse on time: 120 μs, pulse on time: 10 μs, and spark gap: 0.15 m, have been identified. The foremost parameter affecting the responses was found to be peak current.","PeriodicalId":7619,"journal":{"name":"AIP Advances","volume":null,"pages":null},"PeriodicalIF":1.6,"publicationDate":"2024-08-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142224313","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Analysis of space charge and current characters of oil-immersed-paper with simultaneous measurement 通过同步测量分析油浸纸的空间电荷和电流特性
IF 1.6 4区 物理与天体物理
AIP Advances Pub Date : 2024-08-09 DOI: 10.1063/5.0215303
Yuntong Ma, Zepeng Lv, Yining Zhang, Jinyang Peng, Yi Ge, Kai Wu, Yonghong Cheng
{"title":"Analysis of space charge and current characters of oil-immersed-paper with simultaneous measurement","authors":"Yuntong Ma, Zepeng Lv, Yining Zhang, Jinyang Peng, Yi Ge, Kai Wu, Yonghong Cheng","doi":"10.1063/5.0215303","DOIUrl":"https://doi.org/10.1063/5.0215303","url":null,"abstract":"To study the current response to space charge in oil–paper insulation, a simultaneous space charge and external current measurement system are developed for a solid–liquid sample. The space charge and external current of oil-immersed paper are tested under different applied voltages. In the oil–paper sample, it accumulates heterocharge at 0.25 kV and homocharge at a higher voltage. The external currents first decrease and then increase with time. The changing timepoint decreases with the applied voltage. It shows that dynamic space charge evolution influences external current development. An unusual phenomenon is observed that the charge on both electrodes increases without heterocharge accumulation in a certain time range after voltage application, resulting in an increase in the average electric field. The transient electric field and displacement current at the cathode are calculated according to the amount of surface charge at the cathode. It indicates that displacement current takes up the main part of external current and decreases to zero when the surface charge amount stops increasing. After this stage, the conduction current is almost equal to the external current. The correlation between conduction current and electric field is analyzed. It reveals that when the electric field is lower than 5 kV/mm, the conduction current of oil–paper seems to be linear to the electric field strength, following Ohm’s law. When the electric field is higher than 5 kV/mm, the conduction current of oil–paper follows the Fowler–Nordheim law that the ln(jc/E2) is linear to 1/E. The transient external current has great potential in diagnosing electrical equipment.","PeriodicalId":7619,"journal":{"name":"AIP Advances","volume":null,"pages":null},"PeriodicalIF":1.6,"publicationDate":"2024-08-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141943463","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Analyzing the dynamic behavior of the Gierer–Meinhardt model using finite difference method 用有限差分法分析吉勒-梅因哈特模型的动态行为
IF 1.6 4区 物理与天体物理
AIP Advances Pub Date : 2024-08-09 DOI: 10.1063/5.0223717
Jianping Lv, Hefang Jing
{"title":"Analyzing the dynamic behavior of the Gierer–Meinhardt model using finite difference method","authors":"Jianping Lv, Hefang Jing","doi":"10.1063/5.0223717","DOIUrl":"https://doi.org/10.1063/5.0223717","url":null,"abstract":"In this paper, a numerical computation method for the Gierer–Meinhardt model in two-dimensional space diffusion with homogeneous Neumann boundary conditions, considering the interaction between activator and inhibitor substances, is proposed. First, a high-order compact finite difference scheme is constructed for the Gierer–Meinhardt model using the finite difference method. A fourth-order compact difference scheme is applied to the second-order spatial derivative terms, while the time derivative terms are discretized using Taylor series expansion and residual correction functions. Consequently, the difference scheme achieves fourth-order accuracy in space and second-order accuracy in time for the Gierer–Meinhardt model. In addition, the stability of the difference scheme is demonstrated using Fourier analysis. Finally, numerical simulations are conducted on the Gierer–Meinhardt model near its equilibrium point to explore the impact of the inhibitor degradation rate, denoted as E, on the pattern formation. The model exhibits distinct pattern structures with varying E, thereby revealing the relationship between tissue variability and pattern formation in biological systems.","PeriodicalId":7619,"journal":{"name":"AIP Advances","volume":null,"pages":null},"PeriodicalIF":1.6,"publicationDate":"2024-08-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141943490","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Experiment and numerical investigation on internal ballistic characteristics of L-type impulse thruster L 型脉冲推进器内弹道特性的实验和数值研究
IF 1.6 4区 物理与天体物理
AIP Advances Pub Date : 2024-08-09 DOI: 10.1063/5.0219940
Dongjian Su, Qingwei An, Shao Xue, Hao Wang, Ruyi Tao
{"title":"Experiment and numerical investigation on internal ballistic characteristics of L-type impulse thruster","authors":"Dongjian Su, Qingwei An, Shao Xue, Hao Wang, Ruyi Tao","doi":"10.1063/5.0219940","DOIUrl":"https://doi.org/10.1063/5.0219940","url":null,"abstract":"The impulse thruster exhibits the advantages of the simplistic structure and rapid response speed. It is often used for the attitude adjustment and orbit control of the aircraft and space vehicle. In order to study the internal ballistic variation law and the flow characteristics of the gunpowder gas, the interior working process of the L-type impulse thruster was investigated by the numerical simulation and experimental verification. First, an internal ballistic test was designed and conducted, and the change process of the thrust and pressure over time was measured, and the feasibility and rationality of the impulse thruster design were verified. Second, a three-dimensional internal ballistic model of the L-type impulse thruster including the ignition process was established. With the help of the dynamic mesh technology and secondary development capability of the user-defined function in the software Fluent, the coupling process of the propellant combustion and internal flow field change of the gunpowder gas was realized. The calculated results were in good agreement with the test data. Finally, the distribution of the pressure and velocity in the flow field was analyzed in detail, and the variation law of the thrust characteristics with the nozzle length and the expansion ratio was studied, which could provide the essential data for further optimization design research. The outcomes from this paper can offer technical means for advancing studies on the internal ballistic changing law of the L-type impulse thruster.","PeriodicalId":7619,"journal":{"name":"AIP Advances","volume":null,"pages":null},"PeriodicalIF":1.6,"publicationDate":"2024-08-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141943492","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Programmable transmission metasurface scattering control under obstacles based on deep learning 基于深度学习的障碍物下可编程传输元表面散射控制
IF 1.6 4区 物理与天体物理
AIP Advances Pub Date : 2024-08-09 DOI: 10.1063/5.0217386
Kai Wang, Jiwei Zhao, Zhangyou Yang, Peixuan Zhu, Huan Lu, Bin Zheng
{"title":"Programmable transmission metasurface scattering control under obstacles based on deep learning","authors":"Kai Wang, Jiwei Zhao, Zhangyou Yang, Peixuan Zhu, Huan Lu, Bin Zheng","doi":"10.1063/5.0217386","DOIUrl":"https://doi.org/10.1063/5.0217386","url":null,"abstract":"The emergence of 5G represents a pivotal step in merging mobile communication networks with the Industrial Internet of Things. Despite the numerous advantages of 5G, the presence of unknown obstacles can adversely affect user signals. Although mitigating signal pressures can be achieved by increasing base station density, it often involves bulky equipment and high costs. To address this, we propose a deep learning-based method for controlling tunable transmissive metasurfaces and validate their scattering control capabilities in the presence of obstacles. By constructing a network model to analyze the mapping relationship between metasurface arrays and far-field scattering, rapid control of scattering characteristics is achieved. AI-driven high-performance tunable metasurfaces exhibit vast potential applications in intelligent communication, offering a universal solution for intelligent control in complex signal environments.","PeriodicalId":7619,"journal":{"name":"AIP Advances","volume":null,"pages":null},"PeriodicalIF":1.6,"publicationDate":"2024-08-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141943487","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Enhancing device characteristics of pentacene-based organic transistors through graphene integration: A simulation study and performance analysis 通过石墨烯集成增强基于五碳烯的有机晶体管的器件特性:模拟研究与性能分析
IF 1.6 4区 物理与天体物理
AIP Advances Pub Date : 2024-08-09 DOI: 10.1063/5.0218617
Manish Kumar Singh, Kadiyam Anusha, A. D. D. Dwivedi
{"title":"Enhancing device characteristics of pentacene-based organic transistors through graphene integration: A simulation study and performance analysis","authors":"Manish Kumar Singh, Kadiyam Anusha, A. D. D. Dwivedi","doi":"10.1063/5.0218617","DOIUrl":"https://doi.org/10.1063/5.0218617","url":null,"abstract":"Transistors find application within various integrated circuits (ICs) alongside a multitude of electronic devices. These ICs have become integral components in contemporary systems. When organic semiconducting materials constitute the active layer, transistors are termed “organic transistors.” The enhancement of diverse device characteristics is achievable through the modeling and simulation of these organic transistors. This study focuses on the simulation of different configurations of pentacene-based organic transistors. To augment device performance, an active layer comprising pentacene is coupled with 5 and 15 nm graphene. Notably, the top gate configuration yields an increase in ON/OFF ratio from 102 to 107, accompanied by an enhancement in sub-threshold swing from 276 to 59 mV/decade. Similarly, the bottom gate configuration exhibits an ON/OFF ratio improvement from 105 to 109, alongside a sub-threshold swing enhancement from 108 to 59 mV/decade. Leveraging graphene as the active layer material results in substantial benefits. These encompass a heightened on-current of 210 mA, a reduced sub-threshold swing of 58 mV/decade, and a significantly enhanced ON/OFF ratio of 1017.","PeriodicalId":7619,"journal":{"name":"AIP Advances","volume":null,"pages":null},"PeriodicalIF":1.6,"publicationDate":"2024-08-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141943491","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Adaptive grid-forming photovoltaic inverter control strategy based on fuzzy algorithm 基于模糊算法的自适应成网光伏逆变器控制策略
IF 1.6 4区 物理与天体物理
AIP Advances Pub Date : 2024-08-09 DOI: 10.1063/5.0223194
Chenzhao Wang, Kan Cao, Pan Hu
{"title":"Adaptive grid-forming photovoltaic inverter control strategy based on fuzzy algorithm","authors":"Chenzhao Wang, Kan Cao, Pan Hu","doi":"10.1063/5.0223194","DOIUrl":"https://doi.org/10.1063/5.0223194","url":null,"abstract":"In order to enhance the support capability of photovoltaic inverters for new energy microgrid systems, grid-forming control technology has attracted widespread attention, with Virtual Synchronous Generator (VSG) emerging as a research frontier. This paper integrates hybrid energy storage systems with photovoltaic generation to provide stable voltage support and power compensation for the system. In addition, leveraging the variability of the virtual parameters J and D in traditional VSGs, an adaptive grid-forming photovoltaic inverter control strategy based on fuzzy algorithm is proposed. Furthermore, to reduce the frequency deviation caused by load transients during islanding operation, an adaptive droop coefficient based on frequency power limits is introduced. Finally, simulations are conducted under grid-connected and islanded conditions to compare three control methods: fixed parameter control, traditional adaptive control, and the proposed adaptive with fuzzy control. The results demonstrate that integrating adaptive droop coefficients with fuzzy control can effectively improve the frequency stability and dynamic response capability of microgrids.","PeriodicalId":7619,"journal":{"name":"AIP Advances","volume":null,"pages":null},"PeriodicalIF":1.6,"publicationDate":"2024-08-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141943489","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
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