International Journal of Numerical Modelling-Electronic Networks Devices and Fields最新文献

{"title":"A Linearized Finite Difference Scheme for Two-Dimensional Time-Fractional Pseudo-Parabolic Equation on Variable Time Steps","authors":"Fereshteh Sadollalkhani,&nbsp;Sedigheh Toubaei,&nbsp;Mehdi Jalalvand,&nbsp;Mohammad Nabati","doi":"10.1002/jnm.70082","DOIUrl":"https://doi.org/10.1002/jnm.70082","url":null,"abstract":"<div>\u0000 \u0000 <p>This paper presents an efficient approach for solving a two-dimensional time-fractional pseudo-parabolic equation using a linearized finite difference scheme on variable time steps. The equation incorporates fractional derivatives in temporal dimensions to accurately model anomalous diffusion and memory effects in diverse physical phenomena. The study focuses on the challenges associated with solving multidimensional nonlinear time-fractional pseudo-parabolic equations, emphasizing the need for advanced numerical techniques to overcome computational complexities. Considering the localized characteristics of the fractional derivative and the memory property of fractional differential equations, the proposed method offers an efficient and accurate solution strategy tailored for time-fractional pseudo-parabolic equations. Building on previous research on nonuniform finite difference schemes for time-fractional diffusion problems, this study highlights the effectiveness of nonuniform time-stepping methods in achieving higher convergence orders in discretization schemes. The results demonstrate the utility of the proposed approach in accurately capturing the dynamics of complex transport processes in various physical systems. We rigorously prove that the proposed method has a convergence rate of order <span></span><math>\u0000 <semantics>\u0000 <mrow>\u0000 <mi>O</mi>\u0000 <mfenced>\u0000 <mrow>\u0000 <msup>\u0000 <mi>N</mi>\u0000 <mrow>\u0000 <mo>−</mo>\u0000 <mn>2</mn>\u0000 </mrow>\u0000 </msup>\u0000 <mo>+</mo>\u0000 <msubsup>\u0000 <mi>h</mi>\u0000 <msub>\u0000 <mi>x</mi>\u0000 <mn>1</mn>\u0000 </msub>\u0000 <mn>2</mn>\u0000 </msubsup>\u0000 <mo>+</mo>\u0000 <msubsup>\u0000 <mi>h</mi>\u0000 <msub>\u0000 <mi>x</mi>\u0000 <mn>2</mn>\u0000 </msub>\u0000 <mn>2</mn>\u0000 </msubsup>\u0000 </mrow>\u0000 </mfenced>\u0000 </mrow>\u0000 <annotation>$$ Oleft({N}^{-2}+{h}_{x_1}^2+{h}_{x_2}^2right) $$</annotation>\u0000 </semantics></math>. In addition, several numerical simulations are presented to verify the efficiency of the proposed method. The numerical results confirm the theoretical analysis.</p>\u0000 </div>","PeriodicalId":50300,"journal":{"name":"International Journal of Numerical Modelling-Electronic Networks Devices and Fields","volume":"38 4","pages":""},"PeriodicalIF":1.7,"publicationDate":"2025-08-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144843683","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Design and Implementation of a Unified Simulation Framework for Structured Light 3D Measurement","authors":"Junwei Hu,&nbsp;Songping Mai,&nbsp;Yucheng Jiang,&nbsp;Yongliang Ye","doi":"10.1002/jnm.70098","DOIUrl":"https://doi.org/10.1002/jnm.70098","url":null,"abstract":"<div>\u0000 \u0000 <p>We present a MATLAB-based simulation framework for structured light 3D measurement, designed to model complex scenarios and support algorithm evaluation and dataset generation. While structured light methods are widely used for 3D acquisition, existing simulation tools are limited to specific hardware or narrow use cases, restricting their utility. Our work addresses this gap by introducing (1) a unified abstract model that modularizes and encapsulates heterogeneous system components, balancing flexibility with consistent behavioral implementation, and (2) an open-architecture framework centered on a task-scheduling arbitrator, enabling scalable and evolvable simulations. The framework's design prioritizes practical extensibility, offering developers a reusable “how-to” model for building customizable simulations. We detail its implementation challenges and solutions, demonstrating how our approach reduces development overhead while accommodating diverse measurement scenarios. By enabling large-scale synthetic data generation and performance testing, the tool benefits both traditional algorithm designers and data-driven 3D vision pipelines. This work contributes a reusable software foundation for the 3D measurement community, with insights applicable to other simulation-driven domains.</p>\u0000 </div>","PeriodicalId":50300,"journal":{"name":"International Journal of Numerical Modelling-Electronic Networks Devices and Fields","volume":"38 4","pages":""},"PeriodicalIF":1.7,"publicationDate":"2025-08-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144853688","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Understanding the Transmission Mechanism of HIV/TB Co-Infection Using Fractional Framework With Optimal Control","authors":"A. Saranya Devi,&nbsp;Parvaiz Ahmad Naik,&nbsp;Salah Boulaaras,&nbsp;Ndolane Sene,&nbsp;Zhengxin Huang","doi":"10.1002/jnm.70097","DOIUrl":"https://doi.org/10.1002/jnm.70097","url":null,"abstract":"<div>\u0000 \u0000 <p>This study provides an in-depth analysis of HIV and TB coinfection through a mathematical framework based on nonlinear fractional differential equations in the Caputo sense. We perform stability analysis of the equilibrium points using fractional techniques and utilize sensitivity analysis to determine the key parameters that influence disease transmission and control. The findings highlight the importance of controlling transmission rates to effectively reduce the burden of coinfection. The dynamics of both single and coinfection are examined via a fractional optimal control approach. We introduce and evaluate three control strategies aimed at decreasing infection levels, demonstrating the potential to achieve near-elimination. Comparing fractional and traditional models, we identify critical pathways for effective coinfection management. Our results provide valuable insights for policymakers to develop targeted interventions to lessen the impact of HIV and TB in affected communities.</p>\u0000 </div>","PeriodicalId":50300,"journal":{"name":"International Journal of Numerical Modelling-Electronic Networks Devices and Fields","volume":"38 4","pages":""},"PeriodicalIF":1.7,"publicationDate":"2025-08-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144814767","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"A Conformal Multi-Wideband Ultra-Compact Four-Port MIMO Antenna With DGS for Enhanced Diversity in IoT and Bio-Medical Wearable Applications","authors":"Lovish Matta,&nbsp;Manish Sharma,&nbsp;Rana Gill,&nbsp;Naresh Kumar","doi":"10.1002/jnm.70096","DOIUrl":"https://doi.org/10.1002/jnm.70096","url":null,"abstract":"<div>\u0000 \u0000 <p>In this article, a compact quad-port multiple-input-multiple-output (MIMO) broadband access wireless systems antenna on Rogers RTDuroid5880 with a dimension of 20 × 24 × 0.0254 mm³ giving impedance bandwidth spanning from 5.3 to 51.64 GHz is proposed. It is designed to cover a variety of frequency bands, including the Wireless LANs Band (5.725–5.85 GHz), X-band (8.00–12.0 GHz), Ku-band (12.0–18.0 GHz), K-band (18.0–27.0 GHz) and Ka-band (27.0–40.0 GHz) and specific frequency bands like FR2: n257 (26.50–29.50 GHz), n258 (24.25–27.50 GHz), n259 (39.5–43.5 GHz), n260 (37–40 GHz), n261 (27.50–28.35 GHz) and n262 (47 GHz). The partial ground is etched with a circular form patch to provide impedance matching, and the radiating patch has two circular shape slots with a dual ellipse formed by a star-shaped slit. Verifying this antenna's conformal capacity demonstrates that it is suitable for single-port, dual-port, and the suggested four-port antenna configurations, appropriate for a variety of applications. The reliable reception of transmitted signals in far-field areas is confirmed by time-domain analysis. Moreover, the antenna exhibits excellent diversity performance, as indicated by parameters like ECC_WMB, DG_WMB, TARC_WMB, and CCL_WMB, all of which meet or surpass permissible standard values. It achieves a maximum peak gain of 7.17 dBi and maintains stable 2D radiation patterns in principal planes. An important consideration for safety, the Specific-Absorption-Rate (SAR) analysis, is conducted at various operating frequencies within the Microwave-Millimeter wave bands. The results indicate that the SAR remains below the limit of 1.60 W/Kg in human phantom tissue. This establishes its suitability for on-body wireless applications, where minimizing SAR is a critical safety concern and can be deployed in mm-Wave infrastructure. The proposed compact bio-medical wearable antenna can also be utilized for receiving or transmitting signals in communication, IoT, and medical systems, thanks to its efficient and ultra-wideband characteristics.</p>\u0000 </div>","PeriodicalId":50300,"journal":{"name":"International Journal of Numerical Modelling-Electronic Networks Devices and Fields","volume":"38 4","pages":""},"PeriodicalIF":1.7,"publicationDate":"2025-08-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144814828","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Research on the Evaluation of Metal Surface Defect Using CSE-LSTMNet and Eddy Current Testing","authors":"Wenkai Li,&nbsp;Qian Zhao,&nbsp;Tian Meng,&nbsp;Wuliang Yin","doi":"10.1002/jnm.70089","DOIUrl":"https://doi.org/10.1002/jnm.70089","url":null,"abstract":"<div>\u0000 \u0000 <p>The performance of metal workpieces is crucial in industry, and the evaluation of their surface defects is a key factor in ensuring the safety of industrial production. Eddy Current Testing (ECT) offers a non-contact, non-invasive method for detecting metal surface defects efficiently and accurately. However, the evaluation of metal surface defects often heavily relies on the experience of operators, which is not only inefficient but also susceptible to human factors. To effectively address the above issues, this paper proposes an evaluation method using Deep Learning (DL) technology and designs a CSE-LSTMNet model, which introduces the dilated convolutional layer on top of the traditional CNN-LSTM model, enabling faster training speeds and higher accuracy. Meanwhile, a Squeeze and Excitation Networks (SENet) module is added after each residual block to enable the model to automatically acquire the significance of each feature channel, thus enhancing useful channel features while suppressing unimportant ones. The CSE-LSTMNet model has been tested on the publicly available MDDEECT dataset. The simulation results show that the proposed CSE-LSTMNet model exhibits excellent performance in the metal surface defect classification task. Compared with the traditional CNN-LSTM benchmark model, the model achieves significant performance improvement, with the classification accuracy increasing from 86.67% to 92.78% and the F1 score increasing from 86.69% to 92.79%. This indicates that the CSE-LSTMNet model has higher performance and significant advantages in metal defect evaluation.</p>\u0000 </div>","PeriodicalId":50300,"journal":{"name":"International Journal of Numerical Modelling-Electronic Networks Devices and Fields","volume":"38 4","pages":""},"PeriodicalIF":1.7,"publicationDate":"2025-08-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144773645","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Parallelization of Faber Polynomial Based Propagators for Laser Applications","authors":"Wladimir Plotnikov,&nbsp;Dirk Schulz","doi":"10.1002/jnm.70091","DOIUrl":"https://doi.org/10.1002/jnm.70091","url":null,"abstract":"<p>In order to simulate a laser system, the evaluation of a complex semilinear master equation is needed, including the description of the wave propagation by Maxwell's equations and appropriate rate equations. The denser the spatial discretization, the slower the computation time of the time-dependent propagator. To counteract this restriction, the complexity is reduced by applying a nonuniform discretization and by using local operators, since it has already been shown that local operators are more efficient than a global operator. However, in practice, the main task is the management of the data transfer within the framework of local operators, as the necessary extraction and assembly processes represent an unintended overhead next to the actual expansion in terms of the Faber polynomial-based approximation. Here, the use of a CPU and GPU is investigated to reduce the overhead through multiprocessing and to accelerate the expansion through multithreading, respectively. From the results obtained, the usefulness of the proposed approach is demonstrated. Also, an operator splitting approach onto the semilinear master equation is investigated to decrease the runtime, as the underlying matrix can be split into commutating matrices without splitting error.</p>","PeriodicalId":50300,"journal":{"name":"International Journal of Numerical Modelling-Electronic Networks Devices and Fields","volume":"38 4","pages":""},"PeriodicalIF":1.7,"publicationDate":"2025-08-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/jnm.70091","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144773814","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Enhanced Magnetic Field Homogeneity in Portable Nuclear Magnetic Resonance Spectroscopy: Optimization Strategies and Design Innovations","authors":"Mostafa Noohi,&nbsp;Hassan Faraji Baghtash,&nbsp;Habib Badri Gavifekr","doi":"10.1002/jnm.70083","DOIUrl":"https://doi.org/10.1002/jnm.70083","url":null,"abstract":"<div>\u0000 \u0000 <p>This article introduces a novel and compact architecture for generating a highly uniform static magnetic field optimized for nuclear magnetic resonance (NMR) spectroscopy. The design employs the strategic integration of high-performance N52 neodymium magnets within a precision-machined metallic housing to establish a closed magnetic flux circuit, enhancing field homogeneity. A key innovation is the incorporation of coiled iron caps featuring uniquely optimized geometries, facilitating adjustable magnetic flux density via an external DC voltage. It was specifically optimized to mitigate field distortions and maximize the uniformity of the magnetic field within the sample volume, enabling significantly improved spectral resolution compared to conventional designs. The resulting system achieves a static magnetic field of 0.928 T with a measured uniformity of 98% within the sample volume (10 mm gap). The complete assembly, including the magnets, casing, and coils, measures 12 × 13 × 8 cm and weighs 4.5 kg, achieving both high field strength and portability. Finite Element Method (FEM) simulations conducted using COMSOL Multiphysics demonstrate excellent correlation with empirical data, validating the design's robustness and enabling iterative performance optimization. This breakthrough addresses a critical gap in the development of portable NMR devices, offering unparalleled magnetic field uniformity and resolution, thereby expanding the potential for in-field spectroscopic analysis.</p>\u0000 </div>","PeriodicalId":50300,"journal":{"name":"International Journal of Numerical Modelling-Electronic Networks Devices and Fields","volume":"38 4","pages":""},"PeriodicalIF":1.7,"publicationDate":"2025-08-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144773771","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"ANN-Assisted SPICE Model Solutions","authors":"Jiayuan Deng,&nbsp;Long Ma,&nbsp;Jianjun Xu,&nbsp;Alexander Petr","doi":"10.1002/jnm.70065","DOIUrl":"https://doi.org/10.1002/jnm.70065","url":null,"abstract":"<div>\u0000 \u0000 <p>The artificial neural networks (ANN) models have been proven to accurately describe the device's electrical behaviors. However, considering the importance of device physics, the physical-based SPICE models are still the golden standard in the industry. This paper investigates two directions of ANN-assisted SPICE modeling solutions. A scalable inductor model demonstrates the use of ANN to extract the scaling equation, and the hybrid model showcases the ANN enhancement on top of the physical SPICE model. The results show the potential feasibility and practicality of the ANN modeling approach to improve the SPICE model extraction process in speed and accuracy.</p>\u0000 </div>","PeriodicalId":50300,"journal":{"name":"International Journal of Numerical Modelling-Electronic Networks Devices and Fields","volume":"38 4","pages":""},"PeriodicalIF":1.7,"publicationDate":"2025-08-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144767517","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Behavior of Mercury Ion Adsorption at AlGaN Surface and AlGaN/GaN Heterostructure Device Performance: First-Principles and TCAD Study","authors":"Jianming Lei,&nbsp;Jun Wan,&nbsp;Siyu Liu,&nbsp;Yanli Liu,&nbsp;Haineng Bai,&nbsp;Yanmei Sun,&nbsp;Pengfei Shao,&nbsp;Yun Zhao,&nbsp;Yalin Chen,&nbsp;Rui Wang,&nbsp;Yan Dong,&nbsp;Dongjie Zhu,&nbsp;Rigao Wang,&nbsp;Dunjun Chen","doi":"10.1002/jnm.70075","DOIUrl":"https://doi.org/10.1002/jnm.70075","url":null,"abstract":"<div>\u0000 \u0000 <p>Heavy metal ions are toxic to the environment and the human body, so it is particularly important to develop sensor technology that can detect them quickly. However, the existence period of the preparation and testing device is long, the cost is high, and there is secondary pollution to the environment during the configuration of heavy metal solution. Therefore, the simulation calculation method can improve the efficiency and protect the environment by conducting preliminary research on the adsorption characteristics of materials and device characteristics. In this paper, AlGaN/GaN HEMT devices are used to detect heavy metal mercury ions by sensing the change of surface potential. First, based on density functional theory (DFT) and first principles, the change of material properties caused by the adsorption of mercury ions to the AlGaN surface is obtained. It is calculated that the band gap of the material decreases by 0.245 eV after the adsorption of one mercury ion. Then, the TCAD tool was used to construct the AlGaN/GaN HEMT device model, and the output current of the HEMT device was increased by 10.162 mA by correcting the characteristic parameters of the material so as to realize the detection of heavy metal mercury ions, providing reference for the preparation and development of heterostructure HEMT devices based on AlGaN/GaN.</p>\u0000 </div>","PeriodicalId":50300,"journal":{"name":"International Journal of Numerical Modelling-Electronic Networks Devices and Fields","volume":"38 4","pages":""},"PeriodicalIF":1.7,"publicationDate":"2025-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144751577","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"An Ingenious DGS Based Door Lever Shaped–Flexible Ultra-Wide Band Antenna With Reduced SAR for Remote Healthcare, Bioelectronics, and Advancing Future AR and VR Technology","authors":"Aparna Singh,&nbsp;R. K. Dwivedi,&nbsp;V. K. Singh","doi":"10.1002/jnm.70088","DOIUrl":"https://doi.org/10.1002/jnm.70088","url":null,"abstract":"<div>\u0000 \u0000 <p>Conventional antennas are typically made from rigid materials, limiting their flexibility and adaptability for wearable applications. This work presents a novel flexible ultra-wideband (UWB) antenna integrated with electro-textiles, operating over the 3.55–14.3 GHz frequency range. The proposed antenna, made from jeans fabric with low dielectric properties, ensures a reduced specific absorption rate (SAR) and is optimized for multiple applications. These include consumer bioelectronics for real-time health monitoring, biomedical devices for drug delivery, and C-band communications used on satellites. Moreover, these applications incorporate augmented and virtual reality (AR/VR) technology for psychiatric care and the Industrial Internet of Things (IIoT). The antenna also supports Wireless Local Area Network (WLAN) and Rapid Auto Steering (RAS) systems, which were also used for cancer detection. The antenna attains an impedance bandwidth of 120% within the 3.55–14.3 GHz range, with resonance frequencies at 3.73, 8.8, and 12.8 GHz, all exhibiting a return loss below −10 dB (i.e., −19.8, −23.7, and 16.7 dB). It features an omnidirectional and isotropic radiation pattern, ensuring reliable performance across various operational environments. The compact prototype measures 52.8 × 60 × 1.076 mm³ (0.65<i>λ</i>₀ × 0.74<i>λ</i>₀ × 0.013<i>λ</i>₀ at 3.73 GHz), achieving a peak gain of 4.6 dB and an efficiency of 97.12% at 3.73 GHz. Including a Defective Ground Structure (DGS) and a line feed at the lower edge enhances impedance matching and overall antenna performance. Bending tests and SAR analysis confirm safe exposure levels, with a measured SAR of 0.99 W/kg at 12.8 GHz for 10 g of tissue, ensuring nominal health risks analogous to prolonged RF exposure. This study highlights the potential of flexible textile-based antennas for advanced healthcare, wireless communication, and wearable electronics.</p>\u0000 </div>","PeriodicalId":50300,"journal":{"name":"International Journal of Numerical Modelling-Electronic Networks Devices and Fields","volume":"38 4","pages":""},"PeriodicalIF":1.6,"publicationDate":"2025-07-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144666391","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}