检索结果-内蒙古大学图书馆

Electron beam lithography on nonplanar and irregular surfaces

Microsystems & Nanoengineering 2024年第2期10卷 1-23页

作者： Chenxu Zhu Huseyin Ekinci Aixi Pan Bo Cui Xiaoli Zhu Department of Electrical and Computer Engineering and Waterloo Institute for Nanotechnology(WIN) University of WaterlooWaterlooONCanada

E-beam lithography is a powerful tool for generating nanostructures and fabricating nanodevices with fine features approaching a few nanometers in ***,alternative approaches to conventional spin coating and development processes are required to optimize the lithography procedure on irregular *** this review,we summarize the state of the art in nanofabrication on irregular substrates using e-beam *** overcome these challenges,unconventional methods have been *** instance,polymeric and nonpolymeric materials can be sprayed or evaporated to form uniform layers of electron-sensitive materials on irregular ***,chemical bonds can be applied to help form polymer brushes or self-assembled monolayers on these *** addition,thermal oxides can serve as resists,as the etching rate in solution changes after e-beam ***,e-beam lithography tools can be combined with cryostages,evaporation systems,and metal deposition chambers for sample development and lift-off while maintaining low *** nanopyramids can be fabricated on an AFM tip by utilizing ice as a positive ***,Ti/Au caps can be patterned around a carbon ***,3D nanostructures can be formed on irregular surfaces by exposing layers of anisole on organic ice surfaces with a focused *** advances in e-beam lithography on irregular substrates,including uniform film coating,instrumentation improvement,and new pattern transferring method development,substantially extend its capabilities in the fabrication and application of nanoscale structures.

关键词： lithography beam coating

来源：评论

学校读者我要写书评

暂无评论

Maximally Flat Negative Group Delay Prototype Filter Based on Capped Reciprocal Transfer Function of Classical Bessel Filter

引用

Progress in Electromagnetics Research B 2025年 110卷 91-105页

作者： Kandic, Miodrag Bridges, Greg E. Department of Electrical and Computer Engineering University of Manitoba WinnipegMB Canada

A prototype filter design exhibiting Negative Group Delay (NGD) is presented, based on the ratio of two low-pass classical Bessel filter transfer functions of the same order, but with different 3 dB-bandwidths. The resulting design is a reciprocal-Bessel filter transfer function, capped at a finite out-of-band gain. The proposed capped reciprocal-Bessel design is based on a similar concept applied to previously reported capped reciprocal-Butterworth and reciprocal-Chebyshev NGD designs, which use ratios of corresponding classical low-pass filter transfer functions. It is shown that within the in-band frequency range, the synthesized NGD transfer function exhibits a maximally flat group delay characteristic (Bessel-like property). Due to its near-flat in-band group delay characteristic, the design is suitable for constant phase shifter applications. For high design orders, it is shown that the achieved NGD-bandwidth product has an upper asymptotic limit, given by the square root of the out-of-band gain in decibels. When the prototype baseband transfer function is translated to a non-zero center frequency, it is demonstrated that resonator-based implementations are feasible via Sallen-Key, as well as all-passive ladder topologies. A combined in-band magnitude/phase distortion metric is evaluated for selected design examples and applied Gaussian and sinc input waveforms, and it is shown to be proportional to the design order and out-of-band gain. The proposed design's distortion metric is also shown to be generally lower than the previously reported capped reciprocal-Butterworth and reciprocal-Chebyshev designs. © (2025), (Electromagnetics Academy). All rights reserved.

关键词： Group delay

来源：评论

学校读者我要写书评

暂无评论

Mesoscopic theory of the Josephson junction

引用

Physical Review B 2025年第14期111卷 L140505-L140505页

作者： Thomas J. Maldonado Hakan E. Türeci Alejandro W. Rodriguez Department of Electrical and Computer Engineering Princeton University Princeton New Jersey 08544 USA

We derive a mesoscopic theory of the Josephson junction from nonrelativistic scalar electrodynamics. Our theory reproduces the Josephson relations with the canonical current phase relation acquiring a weak second harmonic term, and it improves the standard lumped-element descriptions employed in circuit quantum electrodynamics by providing spatial resolution of the superconducting order parameter and electromagnetic field. By providing an ab initio derivation of the charge qubit Hamiltonian that relates traditionally free qubit parameters to geometric and material properties, we progress toward the quantum engineering of superconducting circuits at the subnanometer scale.

关键词： Hamiltonians

来源：评论

学校读者我要写书评

暂无评论

Enhancing eyeglasses removal in facial images: a novel approach using translation models for eyeglasses mask completion

引用

Multimedia Tools and Applications 2024年 1-20页

作者： Esmaily, Zahra Ebrahimpour-Komleh, Hossein Department of Electrical and Computer Engineering University of Kashan Kashan Iran

Accurately removing eyeglasses from facial images is crucial for improving the performance of various face-related tasks such as verification, identification, and reconstruction. This paper presents a novel approach to enhancing eyeglasses removal by integrating a mask completion technique into the existing framework. Our method focuses on improving the accuracy of eyeglasses masks, which is essential for subsequent eyeglasses and shadow removal steps. We introduce a unique dataset specifically designed for eyeglasses mask image completion. This dataset is generated by applying Top-Hat morphological operations to existing eyeglasses mask datasets, creating a collection of images containing eyeglasses masks in two states: damaged (incomplete) and complete (ground truth). A Pix2Pix image-to-image translation model is trained on this newly created dataset for the purpose of restoring incomplete eyeglass mask predictions. This restoration step significantly improves the accuracy of eyeglass frame extraction and leads to more realistic results in subsequent eyeglasses and shadow removal. Our method incorporates a post-processing step to refine the completed mask, preventing the formation of artifacts in the background or outside of the eyeglasses frame box, further enhancing the overall quality of the processed image. Experimental results on CelebA, FFHQ, and MeGlass datasets showcase the effectiveness of our method, outperforming state-of-the-art approaches in quantitative metrics (FID, KID, MOS) and qualitative evaluations. © The Author(s), under exclusive licence to Springer Science+Business Media, LLC, part of Springer Nature 2024.

关键词： Image reconstruction

来源：评论

学校读者我要写书评

暂无评论

Motion Planning and Control for Improved Ride Comfort in Urban Autonomous Driving

引用

Journal of Institute of Control, Robotics and Systems 2024年第3期30卷 206-213页

作者： Jang, Kyeongjun Kim, Hakil Department of Electrical and Computer Engineering Inha University Korea Republic of

Self-driving shuttle services frequently provide a less comfortable experience for passengers than human drivers. This observation emphasizes the importance of motion planning and control methods. This paper proposes a method to improve ride comfort in urban autonomous driving. The path information is utilized for velocity planning to minimize lateral acceleration and limiting the acceleration when controlling the PID to avoid rapid deceleration. Additionally, the hybrid lateral controller increases path following performance. The proposed method proved excellent performance compared to the existing geometric lateral control method. A decision tree was employed to evaluate ride comfort to meet ISO standards. The acceleration and jerk were assessed to determine their impact on ride comfort. Furthermore, the lateral error and the heading error were analyzed to evaluate the stability of the route during autonomous driving. An experiment was conducted and verified in the actual urban environment of Songdo New Town, Incheon, to ascertain the efficacy of the proposed method in enhancing ride comfort. © ICROS 2024.

关键词： Decision trees

来源：评论

学校读者我要写书评

暂无评论

A Study on Reliability of Interruption Time on Thyristor-based Multi-module SSCB by Parameter Optimization

引用

Transactions of the Korean Institute of electrical Engineers 2024年第1期73卷 37-43页

作者： Kim, Jong-Myoung Song, Jin-Sol Kim, Chul-Hwan Department of Electrical and Computer Engineering Sungkyunkwan University Korea Republic of

With the increasing penetration of PV and RES, the DC source in the power system is rapidly increasing. As a result, there is active discussion regarding the introduction of MVDC distribution networks in Korea. Because DC fault have different characteristics compared to AC fault, research on DC circuit breakers is essential for establishing protection system in MVDC distribution networks. In this paper, research on the optimal parameter design of a SCR-based solid-state circuit breaker is conducted. Proposed SSCB combines the advantages of SSCB with fast interruption time and interrupting method of HCB that generate artificial zero-current crossing point. The proposed SSCB is capable of performing the interruption within 50us upon receiving a trip signal from the relay. It is expected to contribute to the establishment of a reliable protection coordination system in MVDC network. The validation of the operation of the SSCB was performed by Matlab/Simulink. © 2024 Korean Institute of electrical Engineers. All rights reserved.

关键词： Electric power distribution

来源：评论

学校读者我要写书评

暂无评论

Knowledge distillation on spatial-temporal graph convolutional network for traffic prediction

引用

International Journal of computers and Applications 2025年第1期47卷 45-56页

作者： Izadi, Mohammad Safayani, Mehran Mirzaei, Abdolreza Department of Electrical and Computer Engineering Isfahan University of Technology Isfahan Iran

Efficient real-time traffic prediction is crucial for reducing transportation time. To predict traffic conditions, we employ a spatio-temporal graph neural network (ST-GNN) to model our real-time traffic data as temporal graphs. Despite its capabilities, it often encounters challenges in delivering efficient real-time predictions for real-world traffic data. Recognizing the significance of timely prediction due to the dynamic nature of real-time data, we employ knowledge distillation (KD) as a solution to enhance the execution time of ST-GNNs for traffic prediction. In this paper, We introduce a cost function designed to train a network with fewer parameters (the student) using distilled data from a complex network (the teacher) while maintaining its accuracy close to that of the teacher. We use knowledge distillation, incorporating spatial-temporal correlations from the teacher network to enable the student to learn the complex patterns perceived by the teacher. However, a challenge arises in determining the student network architecture rather than considering it inadvertently. To address this challenge, we propose an algorithm that utilizes the cost function to calculate pruning scores, addressing small network architecture search issues, and jointly fine-tunes the network resulting from each pruning stage using KD. Ultimately, we evaluate our proposed ideas on two real-world datasets, PeMSD7 and PeMSD8. The results indicate that our method can maintain the student's accuracy close to that of the teacher, even with the retention of only (Formula presented.) of network parameters. © 2024 Informa UK Limited, trading as Taylor & Francis Group.

关键词： Cost functions

来源：评论

学校读者我要写书评

暂无评论

Robust Place Recognition Using Fusion of Thermal Infrared and RGB Cameras

引用

Journal of Institute of Control, Robotics and Systems 2024年第12期30卷 1414-1421页

作者： Ma, Seungjun Cho, Younggun Department of Electrical and Computer Engineering Inha University Korea Republic of

The performance of camera-based place recognition has significantly improved with the rapid advancement of deep learning. However, RGB cameras still face challenges in handling variations in lighting conditions due to their inherent limitations. Recent research has explored the use of thermal infrared (TIR) cameras to achieve illumination-invariant scene recognition. Nevertheless, TIR cameras can also struggle in scenarios with uniform heat distribution or when objects with extreme temperatures are present. We herein propose a robust place recognition methodology that leverages RGB-TIR feature fusion. We developed a novel network architecture that can dynamically extract information weights from each RGB and TIR image and then generate a weighted descriptor. This approach is particularly effective in scenarios in which one of the sensor modalities is degraded. The proposed method was validated using a dataset covering a subterranean environment, and it demonstrated superior performance compared with existing visual place recognition (VPR) methods. Additionally, we conducted an ablation study to evaluate the effectiveness of the proposed weight extraction network, providing qualitative insights into its performance. © ICROS 2024.

关键词： SLAM robotics

来源：评论

学校读者我要写书评

暂无评论

Quantized Average Consensus With a Plateau Escaping Strategy in Undirected Graphs

引用

IEEE Control Systems Letters 2025年 9卷 709-714页

作者： Oliva, Gabriele Fioravanti, Camilla Makridis, Evagoras Charalambous, Themistoklis Department of Engineering University Campus Bio-Medico of Rome Roma00128 Italy University of Cyprus School of Engineering Department of Electrical and Computer Engineering Nicosia1678 Cyprus Aalto University School of Electrical Engineering Department of Electrical Engineering and Automation Espoo02150 Finland

In this letter, the average consensus problem has been considered for undirected networks under finite bit-rate communication. While other algorithms reach approximate average consensus or require global information about the network for reaching the exact average consensus, we propose a fully distributed consensus algorithm that incorporates an adaptive quantization scheme and achieves convergence to the exact average while only requiring knowledge of an upper bound of the network diameter. Using Lyapunov stability analysis, we characterize the convergence properties of the resulting nonlinear quantized system. Moreover, we provide a fully distributed strategy to escape plateaux, i.e., situations where the Lyapunov function stops descending. Simulation results justify the performance of our proposed algorithm. © 2017 IEEE.

关键词： Lyapunov functions

来源：评论

学校读者我要写书评

暂无评论

Improving the Performance of Universal Traffic Light Recognition Through Dataset Construction and Selection in Semi-supervised Learning

引用

Journal of Institute of Control, Robotics and Systems 2024年第8期30卷 787-792页

作者： Kim, Dayoung Li, Xingyou Kim, Hakil Department of Electrical and Computer Engineering Inha University Korea Republic of

Traffic light recognition in autonomous driving is an essential but very challenging task because its performance is affected by unpredictable environmental conditions. Moreover, the shapes and installations of traffic lights in various countries require a lot of cost and time to collect a huge dataset and train a deep learning model. This study develops a method for constructing training datasets with minimal resource expenditure for more efficient and universally applicable traffic light recognition. It aims to develop a deep learning scheme that can universally recognize various international traffic light configurations by replacing the initial supervised learning stage with a phase that can recognize multiple types of traffic lights and improve performance through self-supervised learning on new datasets. Additionally, this study introduces a data selection algorithm that enables robust recognition under changes in road conditions by enhancing adaptability across diverse environments. This research not only demonstrates improved recognition performance in hazardous road situations but also concludes with potential for efficient application worldwide. Experimental results showed 24.2% improvement in mAP50, even with the same proportion of labeled data, and similar performance with half the labeled data. © ICROS 2024.

关键词： Self-supervised learning

来源：评论

学校读者我要写书评

暂无评论

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案：

请选择收藏分类：

通借通还

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：