检索结果-内蒙古大学图书馆

arXiv 2025年

作者： Kirya, Paula Hochberg, Justin D. Kim, Han Sol Haddadin, Zaid Bordy, Samantha Byun, Jiuk Pokorski, Jonathan K. Poulikakos, Lisa V. Department of Mechanical and Aerospace Engineering UC San Diego La Jolla CA United States Aiiso Yufeng Li Family Department of Chemical and Nano Engineering UC San Diego La Jolla CA United States Department of Electrical and Computer Engineering UC San Diego La Jolla CA United States Program in Materials Science and Engineering UC San Diego La Jolla CA United States

Metasurfaces have pioneered significant improvements in sensing technology by tailoring strong optical responses to weak signals. When designed with anisotropic subwavelength geometries, metasurfaces can tune responses to varying polarization states of light. Leveraging this to quantify structural alignment in fibrous materials unveils an alternative to destructive characterization methods. This work introduces metasurface-enhanced polarized light microscopy (Meta-PoL), which employs polarization-tunable, guided-mode-resonant colorimetric metasurfaces to characterize molecular and bulk alignment of poly(Ε-caprolactone) (PCL) nanofibers in a far-field configuration. PCL nanofibers drawn at 0%, 400%, and 900% ratios were interfaced with the studied metasurfaces. Metasurface resonances coinciding with the intrinsic drawn nanofiber resonances – confirmed by Stokes Polarimetry – produced the strongest colorimetric enhancement, resultant from alignment-specific nanofiber reflectivity. The enhancement degree corresponded with molecular and bulk alignments for each draw ratio, as measured through differential scanning calorimetry and scanning electron microscopy, respectively. Thus, Meta-PoL presents an all-optical, non-destructive, and quantitative measurement of nanofiber alignment. Copyright © 2025, The Authors. All rights reserved.

关键词： Differential scanning calorimetry

来源：评论

学校读者我要写书评

暂无评论

Adversarially Regularized Graph Attention Networks for Inductive Learning on Partially Labeled Graphs

arXiv

引用

arXiv 2021年

作者： Xiao, Jiaren Dai, Quanyu Xie, Xiaochen Lam, James Kwok, Ka-Wai Department of Mechanical Engineering The University of Hong Kong Hong Kong Department of Computing The Hong Kong Polytechnic University Hong Kong Department of Automation Harbin Institute of Technology Shenzhen China Guangdong Key Laboratory of Intelligent Morphing Mechanisms and Adaptive Robotics Shenzhen China

The high cost of data labeling often results in node label shortage in real applications. To improve node classification accuracy, graph-based semi-supervised learning leverages the ample unlabeled nodes to train together with the scarce available labeled nodes. However, most existing methods require the information of all nodes, including those to be predicted, during model training, which is not practical for dynamic graphs with newly added nodes. To address this issue, an adversarially regularized graph attention model is proposed to classify newly added nodes in a partially labeled graph. An attention-based aggregator is designed to generate the representation of a node by aggregating information from its neighboring nodes, thus naturally generalizing to previously unseen nodes. In addition, adversarial training is employed to improve the model’s robustness and generalization ability by enforcing node representations to match a prior distribution. Experiments on real-world datasets demonstrate the effectiveness of the proposed method in comparison with the state-of-the-art methods. The code is available at https://***/JiarenX/AGAIN. Copyright © 2021, The Authors. All rights reserved.

关键词： Graph neural networks

来源：评论

学校读者我要写书评

暂无评论

Characteristic of the UAV structural design and platform in military-use environment: State and development

引用

AIP Conference Proceedings 2023年第1期2674卷

作者： Annas Isman Saputro Aditya Rio Prabowo D. Danardono Dwi Prija Tjahjana Ristiyanto Adiputra Hari Nubli Department of Mechanical Engineering Universitas Sebelas Maret Surakarta Indonesia Department of Marine Systems Engineering Kyushu University Fukuoka Japan Interdisciplinary Program of Marine Convergence Design Pukyong National University Busan South Korea

The development of unmanned aerial vehicles (UAVs) in this modern era is growing rapidly, starting from the design, structure, and security systems of the UAV itself. UAVs are starting to be widely used in everyday life and in military activities. A lot of research has been done to find the most optimal design for a UAV, especially in the military field which requires high precision and accuracy. In terms of structure, a lot of research has been done, from the material side to the reinforcing structure. The security system of a UAV is also very important so as not to endanger the community and reduce errors when a UAV is on a mission. The results of this article show how the development of the design, structure, and security system of a UAV.

关键词：

来源：评论

学校读者我要写书评

暂无评论

Iterated greedy local search for the order picking problem considering storage location and order batching decisions

引用

Transportation Research Part E: Logistics and Transportation Review 2025年 201卷

作者： Huerta-Muñoz, Diana L. Ríos-Mercado, Roger Z. López-Pérez, Jesús F. Graduate Program in Systems Engineering Department of Mechanical and Electrical Engineering Universidad Autónoma de Nuevo León San Nicolás de los Garza Mexico Graduate Program in Electrical Engineering Department of Mechanical and Electrical Engineering Universidad Autónoma de Nuevo León San Nicolás de los Garza Mexico Department of Business Management and Public Accounting Universidad Autónoma de Nuevo León San Nicolás de los Garza Mexico College of Business Texas A&M International University Laredo United States

Order picking is the process of collecting products from a specific location to complete customer orders. Two related activities that affect the order picking are the storage location of products and the order batching. In the first, the decision is where to place items arriving at the warehouse and, in the second, the decision is to group multiple customer orders into a single batch. Although these three decisions are typically addressed separately, their integration may result in an enhanced decision-making process. We study an integrated picking problem that considers these three decisions simultaneously. The aim is to obtain the best storage location of products, order batching, and picking routing that minimizes the total picking routing cost. We propose a mathematical model and an iterated greedy local search metaheuristic. The proposed approaches were assessed on pseudo-real and real-world instances. The results show that the mathematical model, solved using a general-purpose optimization solver, can generate feasible solutions for instances with up to 100 order lines in approximately 14 400 s. In contrast, the proposed metaheuristic efficiently solves instances with up to 8197 order lines in less than 4200 s, achieving improvement gaps of up to 87.2% for artificial instances. For real-world instances, the improvement reaches up to 56% compared to the solver results. An analysis was conducted under different demand scenarios showing that the metaheuristic obtained the best performance in most of the cases. © 2025 Elsevier Ltd

关键词： Integer programming

来源：评论

学校读者我要写书评

暂无评论

Design and characterization of a passive instrumented hand

引用

ASME 2019 Dynamic Systems and Control Conference, DSCC 2019

作者： Yousaf, Saad N. Joshi, Victoria S. Britt, John E. Rose, Chad G. O’Malley, Marcia K. Mechatronics and Haptic Interfaces Laboratory Department of Mechanical Engineering Rice University HoustonTX United States ReNeu Robotics Lab Department of Mechanical Engineering University of Texas at Austin AustinTX United States

ISBN: (纸本)9780791859148

Although soft robotic assistive gloves have high potential for restoring functional independence for individuals with motor impairment, their lack of rigid components makes it difficult to obtain accurate position sensing to validate their performance. To track soft device motion, standard practice rely on costly optical motion capture techniques, which have reduced accuracy due to limitations in marker occlusion and device deformation. We propose the Instrumented Hand as a low-cost, open-source measurement tool to serve as a standard solution for comparing joint-level position and torque measurements from magnetoresistive sensors. Shown in a case study, the Instrumented Hand can be used to validate soft wearable devices and evaluate range of motion (ROM) and torque capabilities. Copyright © 2019 ASME

关键词： Design

来源：评论

学校读者我要写书评

暂无评论

Study of Glottal Attack Time and Glottal Offset Time in Neurogenic Voice Disorders During Sustained Phonation

引用

Journal of Voice 2025年

作者： Henry, Trent M. Deliyski, Dimitar D. Zayernouri, Mohsen Zacharias, Stephanie R.C. Naghibolhosseini, Maryam Department of Communicative Sciences and Disorders Michigan State University 1026 Red Cedar Rd East Lansing MI United States Department of Mechanical Engineering and Statistics and Probability Michigan State University 474 S Shaw Ln East Lansing MI United States Head and Neck Regenerative Medicine Program Mayo Clinic 13400 E Shea Blvd Scottsdale AZ United States Department of Otolaryngology-Head and Neck Surgery Mayo Clinic 5777 E Mayo Blvd Phoenix AZ United States

Objective: Neurogenic voice disorders like adductor laryngeal dystonia (AdLD), vocal tremor, and vocal paresis/paralysis impact the neuromuscular control of the phonatory system, which might lead to an impaired phonation onset/offset. Utilizing laryngeal high-speed videoendoscopy (HSV), this study investigates the glottal attack time (GAT) and glottal offset time (GOT) during soft, habitual, and hard glottal attack modalities in sustained phonation for several neurogenic voice disorders. Methods: HSV data and audio recordings were obtained simultaneously from 14 participants with neurogenic voice disorders and 14 normophonic participants during two productions of the /i/ vowel at soft, habitual, and hard glottal attacks. Using HSV, GAT, defined as the time interval between the first oscillation and the first contact of the vocal folds at phonation onset, and GOT, the time interval between the last oscillation and the last contact of the vocal folds at phonation offset, were measured. GAT and GOT for different glottal attack modalities were compared within each group, also among the different disorders and normophonic participants. Additionally, these values were compared between sustained phonation and connected speech for the normophonic participants and those with AdLD. Results: The neurogenic disorders group exhibited significantly higher GAT values than the normophonic participants during the hard glottal attack modality. Habitual GOTs for vocal tremor were significantly different than those of unilateral vocal fold paralysis and AdLD. Moreover, the normophonic participants shared similar trends between connected speech and sustained phonation across glottal attack modalities for GAT, while the AdLD group did not. AdLD participants shared the same trend for GOT, while normophonic participants did not. Conclusions: This study provides evidence of differences in GAT and GOT values during sustained phonation across different neurogenic voice disorders, contributing

关键词： Neurogenic voice disorders—High-speed videoendoscopy—Sustained phonation—Glottal attack time—Glottal offset time

来源：评论

学校读者我要写书评

暂无评论

Modified Backstepping Algorithm with Disturbances Compensation for Nonlinear MIMO Systems ⁎

引用

IFAC-PapersOnLine 2020年第2期53卷 6012-6018页

作者： Dmitry E. Konovalov Sergey A. Vrazhevsky Igor B. Furtat Artem S. Kremlev Department of Control Systems and Industrial Robotics ITMO University The Laboratory ”Control of Complex Systems” Institute for Problems in Mechanical Engineering of the Russian Academy of Sciences (IPME RAS)

The paper deals with a novel modified backstepping algorithm to ensure the stability of the nonlinear multiple-input multiple-output plant under unknown bounded parametric uncertainties, Lipschitz nonlinear disturbances, and cross-couplings. The modification is based on the auxiliary loop method that permits to estimate undesired dynamics as disturbances and suppress them. High robustness of the closed-loop system without using high-gain components is achieved. The ractical contribution of the results is demonstrated using laboratory platform ”Twin Rotor MIMO System”.

关键词： Backstepping recurcive procedure auxiliary loop method robust control nonlinear system MIMO systems output control parametric uncertainties external disturbances cross reactions

来源：评论

学校读者我要写书评

暂无评论

AI-driven 3D Spatial Transcriptomics

arXiv

引用

arXiv 2025年

作者： Almagro-Pérez, Cristina Song, Andrew H. Weishaupt, Luca Kim, Ahrong Jaume, Guillaume Williamson, Drew F.K. Hemker, Konstantin Lu, Ming Y. Singh, Kritika Chen, Bowen Le, Long Phi Baras, Alexander S. Jiang, Sizun Bashashati, Ali Liu, Jonathan T.C. Mahmood, Faisal Department of Pathology Mass General Brigham Harvard Medical School BostonMA United States Cancer Program Broad Institute of Harvard and MIT CambridgeMA United States Data Science Program Dana-Farber Cancer Institute BostonMA United States Harvard-MIT Division of Health Sciences and Technology Massachusetts Institute of Technology CambridgeMA United States Department of Pathology Pusan National University Busan Korea Republic of Department of Pathology and Laboratory Medicine Emory University School of Medicine AtlantaGA United States Department of Computer Science & Technology University of Cambridge Cambridge United Kingdom Department of Electrical Engineering and Computer Science Massachusetts Institute of Technology CambridgeMA United States Rutgers Robert Wood Johnson Medical School New BrunswickNJ United States Department of Pathology Johns Hopkins Hospital BaltimoreMD United States Department of Biomedical Engineering Johns Hopkins Hospital BaltimoreMD United States Broad Institute of Harvard and MIT CambridgeMA United States Center for Virology and Vaccine Research Beth Israel Deaconess Medical Center Harvard Medical School BostonMA United States Department of Pathology Dana Farber Cancer Institute BostonMA United States Department of Pathology and Laboratory Medicine University of British Columbia VancouverBC Canada School of Biomedical Engineering University of British Columbia VancouverBC Canada Department of Mechanical Engineering Bioengineering Laboratory Medicine & Pathology University of Washington SeattleWA United States Harvard Data Science Initiative Harvard University CambridgeMA United States

A comprehensive three-dimensional (3D) map of tissue architecture and gene expression is crucial for illuminating the complexity and heterogeneity of tissues across diverse biomedical applications1. However, most spatial transcriptomics (ST) approaches remain limited to two-dimensional (2D) sections of tissue2–4. Although current 3D ST methods hold promise, they typically require extensive tissue sectioning, are complex, are not compatible with non-destructive 3D tissue imaging technologies, and often lack scalability5–8. Here, we present VOlumetrically Resolved Transcriptomics EXpression (VORTEX), an AI framework that leverages 3D tissue morphology and minimal 2D ST to predict volumetric 3D ST. By pretraining on diverse 3D morphology–transcriptomic pairs from heterogeneous tissue samples and then fine-tuning on minimal 2D ST data from a specific volume of interest, VORTEX learns both generic tissue-related and sample-specific morphological correlates of gene expression. This approach enables dense, high-throughput, and fast 3D ST, scaling seamlessly to large tissue volumes far beyond the reach of existing 3D ST techniques. By offering a cost-effective and minimally destructive route to obtaining volumetric molecular insights, we anticipate that VORTEX will accelerate biomarker discovery and our understanding of morphomolecular associations and cell states in complex tissues. Interactive 3D ST volumes can be viewed at https://***/. © 2025, CC BY-NC-ND.

关键词： Vortex flow

来源：评论

学校读者我要写书评

暂无评论

Single atom catalyst towards ammonia synthesis at mild conditions

引用

Science China Chemistry 2018年第9期61卷 1045-1046页

作者： Zhiwei Fang Guihua Yu Materials Science and Engineering Program and Department of Mechanical Engineering The University of Texas at Austin

Nitrogen is an essential nutrient element for all living organisms,however in its sufficient molecular form,nitrogen could not be utilized to meet the crucial need for global food requirements or industrial production due to its strong nonpolar N≡N triple ***,nitrogen fixation is an essential transformation but this only occurs in the nature with the help of nitrogenases[1].Although nitrogen can be artificially transformed into ammonia through the wellestablished Haber-Bosch process,the reaction is accomplished under drastic conditions,

关键词：氨合成温和条件催化剂原子氮固定工业生产有机体三元组

来源：评论

学校读者我要写书评

暂无评论

Mechanics of cracking and delamination in 3D-printed microelectronic films

引用

Acta Materialia 2025年 296卷

作者： Chunshan Hu Sanjida Jahan Rahul Panat Department of Mechanical Engineering Carnegie Mellon University Pittsburgh PA 15213 USA Robotics Institute Carnegie Mellon University Pittsburgh PA 15213 USA Manufacturing Futures Institute Carnegie Mellon University Pittsburgh PA 15213 USA

Integrity of thin films with micron-sized thickness is of high importance to the microelectronics industry. The mechanisms and mechanics of the cracking of such films made by conventional methods such as chemical and/or physical vapor deposition are well understood. Printed electronic techniques have recently emerged that allow films of various functional materials to be fabricated on-demand via nanoparticle printing followed by sintering. The failure mechanisms in such cases, however, are strongly influenced by the fabrication technique and the material used, but this dependence is not well understood. In this research, we study the mechanisms of cracking and delamination of Aerosol Jet (AJ) 3D nano-printed gold films on ceramic substrates. The layer-by-layer film fabrication allows the determination of effect of each process step (printing, drying, and sintering) on film stress and failure. We show that film cracking occurs only during the film drying phase (i.e., immediately following printing), and is relatively independent of the underlying substrate. We also show that the most significant factor affecting cracking is the glass transition temperature ( T g ) of the binder in the printed film (which is removed during sintering but is present during printing and drying); with drying-induced capillary stress giving rise to the classic ‘mud-cracking’. In other words, if printing is done close to the T g of the binder, the system becomes unusually strain tolerant and cracking can be avoided. As expected, the delamination is found to be a function of the film-substrate interface interaction. Finally, we develop failure mechanism maps for printed electronic films and determine the thickness below which reliable films can be fabricated. This work lays the foundation of engineering strategies for the reliable fabrication of electronic films via 3D printing.

关键词： Thin films Printed electronics Additive manufacturing Delamination Cracking Aerosol jet printing

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

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

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

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

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：