Physica Scripta最新文献_第5页

Phytochemical preparation of Zinc Stannate nanoparticles by using lemon and grapefruit peels for removal of cadmium ions 利用柠檬皮和柚子皮的植物化学制备纳米锡酸锌颗粒以去除镉离子

Physica Scripta Pub Date : 2024-07-26 DOI: 10.1088/1402-4896/ad6811

Aneta Salova, Sura Mohammad Mohealdeen, Abbas Hameed Abdul Hussein, Dheyaa Flayih Hasan, Hiba Mushtaq, A. Idan, R. Fallah Amer

{"title":"Phytochemical preparation of Zinc Stannate nanoparticles by using lemon and grapefruit peels for removal of cadmium ions","authors":"Aneta Salova, Sura Mohammad Mohealdeen, Abbas Hameed Abdul Hussein, Dheyaa Flayih Hasan, Hiba Mushtaq, A. Idan, R. Fallah Amer","doi":"10.1088/1402-4896/ad6811","DOIUrl":"https://doi.org/10.1088/1402-4896/ad6811","url":null,"abstract":"\u0000 The synthesis of Zinc Stannate (Zn2SnO4) nanoparticles may be achieved by utilizing lemon and grapefruit peels, as indicated by the results of this study. This analysis outlines a sustainable, cost-effective, and readily available approach. The Zn2SnO4 nanoparticles were generated biologically and were discovered to have a cubic crystalline structure, as established by structural analysis using Rietveld refinement. TEM microstructural examinations revealed that Zn2SnO4 nanoparticles exhibit a homogeneous distribution and possess an average diameter of around 21 nm. The Zn2SnO4 nanoparticles have an optical energy band gap of 3.05 eV and demonstrate a UV region peak, which showed that Zn2SnO4 nanoparticles were being formed. More precisely, the pH of the solution greatly affects the absorption of Cd2+ ions. Kinetic analysis involves the use of two types of models: pseudo-first-order and pseudo-second-order. The previous model yields an R2 value of 0.9031 and a rate constant (k1) of 0.41×10-2 min-1. However, the pseudo-second-order model provides a better match, as seen by its very high R2 value of 0.9932 and rate constant (k2) value of 4.4×10-3 g.(mg.min)−1. In addition, isotherm modeling shows that the experimental data closely match the Freundlich isotherm model.","PeriodicalId":503429,"journal":{"name":"Physica Scripta","volume":"11 18","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-07-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141801130","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A Robust Integrated Navigation Optimization Method for USV in Signal Occlusion Environment 信号闭塞环境下 USV 的稳健综合导航优化方法

Physica Scripta Pub Date : 2024-07-26 DOI: 10.1088/1402-4896/ad680e

Naiyuan Lou, Wei Liu, Yuan Hu, Shengzhe Wang, Bing Han

{"title":"A Robust Integrated Navigation Optimization Method for USV in Signal Occlusion Environment","authors":"Naiyuan Lou, Wei Liu, Yuan Hu, Shengzhe Wang, Bing Han","doi":"10.1088/1402-4896/ad680e","DOIUrl":"https://doi.org/10.1088/1402-4896/ad680e","url":null,"abstract":"\u0000 Unmanned surface vehicles (USV) can use global navigation satellite systems (GNSS) and inertial navigation systems (INS) for combined positioning and navigation. However, buildings such as port facilities and bridges blocking GNSS signals will increase the error in the discriminator output in the GNSS vector tracking loop and reduce positioning accuracy. Meanwhile, due to the cumulative error in the inertial navigation system, the credibility of the navigation results when the signal is blocked is further reduced. In this regard, this study proposes a robust integrated navigation optimization method. Specifically, the RTS smoothing optimized Kalman filter is used to constrain the carrier phase error and code phase error output by the discriminator, which can dynamically adjust the gain of the vector tracking loop, thereby improving the signal tracking capability. Simultaneously, the prediction results of the gated recurrent unit (GRU) network optimized based on the attention mechanism are combined with the inertial navigation system to improve navigation accuracy. Furthermore, an adaptive Kalman filter is utilized as the integrated navigation filter. The actual path of the carrier refers to the navigation solution of the existing receiver. In the open environment, the proposed optimization method reduces horizontal positioning error and speed error by 44.7% and 37.1% respectively compared with existing methods. Simultaneously, it can effectively improve the robustness of positioning in signal obstruction environments. The proposed integrated navigation method provides new possibilities for optimizing USV navigation solutions.","PeriodicalId":503429,"journal":{"name":"Physica Scripta","volume":"38 19","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-07-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141800113","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Mixed localized waves and their interaction structures for a spatial discrete Hirota equation 空间离散广达方程的混合局部波及其相互作用结构

Physica Scripta Pub Date : 2024-07-26 DOI: 10.1088/1402-4896/ad6810

Jun Yang, Yueya Chang, Lili Wen

{"title":"Mixed localized waves and their interaction structures for a spatial discrete Hirota equation","authors":"Jun Yang, Yueya Chang, Lili Wen","doi":"10.1088/1402-4896/ad6810","DOIUrl":"https://doi.org/10.1088/1402-4896/ad6810","url":null,"abstract":"\u0000 Mixed localized wave solutions and interactions are of great significance in nonlinear physical systems. This paper aims to investigating the generalized (m,N-m)-fold Darboux transformation and the mixed localized wave solutions of a spatial discrete Hirota equation. First, we construct the generalized (m,N-m)- fold Darboux transformation for the spatial discrete Hirota equation, which can produce the interactions between the breathers, degenerate breathers and rogue waves. For the Darboux transformation formula, we discuss the above order-1,2,3 localized wave solutions, as well as their dynamics by choosing the number of m = 1. We plot some specific examples such as the spatial (time)-periodic breather, second- order and third-order degenerate breathers, solutions, and higher-order rogue waves with novel patterns. Furthermore, when m > 1, we give several kinds of mixed interaction solutions between the first-order rogue waves and first (second)-order (degenerate) breathers, between the first-order breather and second- order degenerate breathers, between second-order rogue waves and first-order breathers. At last, we also sum up the various mathematical features of the degenerate breathers and the mixed localized wave solutions.","PeriodicalId":503429,"journal":{"name":"Physica Scripta","volume":"62 4","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-07-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141798972","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Exploring chaotic behavior of optical solitons in complex structured Conformable Perturbed Radhakrishnan-Kundu-Lakshmanan Model 探索复杂结构可变形扰动拉达克里希南-昆杜-拉克希曼南模型中光孤子的混沌行为

Physica Scripta Pub Date : 2024-07-25 DOI: 10.1088/1402-4896/ad67b1

Rashid Ali, Mohammad Mahtab Alam, Shoaib Barak

引用次数: 0

Analyzing the Kuralay-II equation: Bifurcation, chaos, and sensitivity insights through conformable derivative and Jacobi elliptic function expansion 分析库拉雷-II方程：通过保形导数和雅可比椭圆函数展开深入了解分岔、混沌和敏感性

Physica Scripta Pub Date : 2024-07-25 DOI: 10.1088/1402-4896/ad67af

Muhammad Ishfaq Khan, Abdullah Khan, Aamir Farooq

{"title":"Analyzing the Kuralay-II equation: Bifurcation, chaos, and sensitivity insights through conformable derivative and Jacobi elliptic function expansion","authors":"Muhammad Ishfaq Khan, Abdullah Khan, Aamir Farooq","doi":"10.1088/1402-4896/ad67af","DOIUrl":"https://doi.org/10.1088/1402-4896/ad67af","url":null,"abstract":"\u0000 This study explores the intricate dynamics of the Kuralay-II equation by employing the conformable derivative. Using the Galilean transformation, we can establish a dynamical system related to the equation. We investigate bifurcation methods in this derived system using planar dynamical systems theory. By introducing a perturbed term, we thoroughly investigate the possibility of chaotic behaviors in the Kuralay-II equation using comprehensive two-phase portraiture. Through careful analysis, we have determined that even small changes in the initial conditions have little impact on the stability of the solution which has been confirmed by employing the Runge-Kutta method. In addition, we obtain exact solutions for the Kuralay-II equation by the Jacobi elliptic function expansion method. Graphical results of some solutions are showcased, offering a comprehensive evaluation using MATLAB across various dimensions. This study has yielded significant findings, such as the discovery of bifurcation points, the determination of conditions for chaos, and the analysis of stability under perturbations. These results have enhanced our understanding of the behavior of the Kuralay-II equation.","PeriodicalId":503429,"journal":{"name":"Physica Scripta","volume":"14 4","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-07-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141803783","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

An Adaptive Two-Step Staircase Static Reconfiguration Method for Improving the Power Generation of PV Array 改进光伏阵列发电量的自适应两步阶梯式静态重构方法

Physica Scripta Pub Date : 2024-07-25 DOI: 10.1088/1402-4896/ad67b3

Lingzhi Yi, Siyue Cheng, Yahui Wang, Bote Luo, Jingxuan Tan, Jiangyong Liu

{"title":"An Adaptive Two-Step Staircase Static Reconfiguration Method for Improving the Power Generation of PV Array","authors":"Lingzhi Yi, Siyue Cheng, Yahui Wang, Bote Luo, Jingxuan Tan, Jiangyong Liu","doi":"10.1088/1402-4896/ad67b3","DOIUrl":"https://doi.org/10.1088/1402-4896/ad67b3","url":null,"abstract":"\u0000 Partial shading of solar photovoltaic (PV) panels can significantly affect the performance of solar PV arrays. Various reconfiguration techniques have been explored in recent years. Still, their applicability to actual PV power generation is controversial due to the number of electrical switches, physical locations, interconnections and complexity. This study proposes an adaptive two-step staircase (A2SS) static reconfiguration method. The technique is experimentally validated in several conditions and compared with the conventional TCT connection, single-step staircase (1SS) static reconfiguration method, Arrow soduku, modified odd–even–prime (MOEP) and two-step staircase(2SS) static reconfiguration method. For the eight shading cases of LN, LW, LD, Ran, Cen, Cor, CD, and Plus at SET#1, after reconfiguring the PV array using A2SS, the power has a significant improvement of 17.6%, 17.0%, 13.4%, 13.4%, 20.6%, 20.2%, 3.1%, and 0.82% than TCT. In the four shading cases of Lr. C, Lr. O, Lr. T, and Lr. U at SET#2, the power showed a significant improvement of 11.8%, 9.2%, 10.7%, and 15.8% compared to TCT. It also has the best performance in various reconfiguration techniques, which are mentioned. In addition, the A2SS reconfiguration method can be better applied to various sizes of PV arrays. By optimizing the shading distribution and adjusting the row irradiance deviation, the power stability of PV power generation is improved while maximizing energy efficiency.","PeriodicalId":503429,"journal":{"name":"Physica Scripta","volume":"5 4","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-07-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141804246","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Evidence of spin-phonon interactions in MgCu2O3: low temperature Raman studies MgCu2O3 中自旋与声子相互作用的证据：低温拉曼研究

Physica Scripta Pub Date : 2024-07-25 DOI: 10.1088/1402-4896/ad67b0

Somesh Chandra, Gurpreet Kaur, Rajkumar Gupta, S. Chakravarty, G. M. Bhalerao, Govindaraj Ramanujam

引用次数: 0

Performance enhancement of silicon photodiodes through the integration of green synthesized reduced graphene oxide variants 通过集成绿色合成的还原氧化石墨烯变体提高硅光电二极管的性能

Physica Scripta Pub Date : 2024-07-25 DOI: 10.1088/1402-4896/ad67b8

D. E. Yıldız, O. Surucu, H. Mert Balaban, I. Bilici, Murat Yıldırım

{"title":"Performance enhancement of silicon photodiodes through the integration of green synthesized reduced graphene oxide variants","authors":"D. E. Yıldız, O. Surucu, H. Mert Balaban, I. Bilici, Murat Yıldırım","doi":"10.1088/1402-4896/ad67b8","DOIUrl":"https://doi.org/10.1088/1402-4896/ad67b8","url":null,"abstract":"\u0000 This study examines the potential of enhancing the optoelectronic properties of silicon photodiodes by producing and analyzing heterostructures that incorporate reduced graphene oxide (rGO) synthesized with silicon using different reduction methods. Graphene oxide (GO) was manufactured utilizing an enhanced Hummers' method. Subsequently, reduced graphene oxides (rGOs) were made by chemical and thermal reduction processes, which are considered ecologically friendly. The use of ascorbic acid to produce ascorbic acid-reduced graphene oxide (ArGO) and thermal processing to produce thermally reduced graphene oxide (TrGO) have significantly contributed to the development of high-performance photodiode technology. The electrical properties were carefully assessed under different levels of light, revealing the substantial impact of integrating reduced graphene oxides (rGOs) on the performance of the diodes. Comparing ArGO/Si, TrGO/Si, and GO/Si heterostructures shows that customized rGO has the potential to greatly influence the responsivity and efficiency of Si-based optoelectronic devices, making a significant contribution to photodiode technology.","PeriodicalId":503429,"journal":{"name":"Physica Scripta","volume":"33 3","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-07-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141803515","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Real-time particle concentration measurement from a hologram by deep learning 通过深度学习从全息图实时测量颗粒浓度

Physica Scripta Pub Date : 2024-07-25 DOI: 10.1088/1402-4896/ad67ac

Hongjie Ou, Wendi Lin, Wei-Na Li, Xiangsheng Xie

引用次数: 0

Numerical analysis of electrohydrodynamic printing under electric field focusing mode 电场聚焦模式下的电流体动力印刷数值分析

Physica Scripta Pub Date : 2024-07-25 DOI: 10.1088/1402-4896/ad67aa

Dongqiao Bai, Jin Huang, Jianjun Wang, H. Gong, Chaoyu Liang, Jinquan Zhang

{"title":"Numerical analysis of electrohydrodynamic printing under electric field focusing mode","authors":"Dongqiao Bai, Jin Huang, Jianjun Wang, H. Gong, Chaoyu Liang, Jinquan Zhang","doi":"10.1088/1402-4896/ad67aa","DOIUrl":"https://doi.org/10.1088/1402-4896/ad67aa","url":null,"abstract":"\u0000 As an emerging micro/nanoscale 3D printing technology, Electrohydrodynamic (EHD) printing has undergone rapid development in recent years. However, in most EHD printing processes, voltage is directly applied to both the nozzle and the substrate, resulting in the electric field being influenced by the printing height. This poses challenges for printing three-dimensional curved surface structures. This study presents a comprehensive investigation into the EHD jetting process, utilizing a novel voltage loading method that separates electrodes from both the nozzle and the substrate. Through experimental setups and numerical simulations, this research was conducted to examine the effects of printing height, voltage, and electrode diameter on jetting behavior. The results show that compared to the traditional electrode form, the new voltage loading method will increase the electric field intensity of the liquid surface before ejection by 37.1% and is more conducive to the formation of Taylor cones. It can ensure that the printing fluctuation is less than 2.4% when the printing height varies between 1.5-2.5 times the nozzle diameter, which is more favorable for printing multi-layer structures. The threshold voltage for ejection is provided in this model. When the electrode is reduced, the efficiency of electric field utilization will be further improved, but the acceleration of the jet velocity will cause an increase in droplet size. The findings highlight the method's capability to maintain consistent droplet sizes and electric field intensities across varying conditions, thereby enhancing printing stability and efficiency. The study's innovations provide valuable insights for advancing micro/nano 3D printing technologies, emphasizing the potential for improved EHD printing processes in practical engineering applications.","PeriodicalId":503429,"journal":{"name":"Physica Scripta","volume":"4 9","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-07-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141804387","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0