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Routing and Spectrum Assignment in Spatial Channel Network-Based Inter-Datacenter Networks

Routing and Spectrum Assignment in Spatial Channel Network-B...

2023 Asia Communications and Photonics Conference/2023 International Photonics and Optoelectronics Meetings, ACP/POEM 2023

作者： Zheng, Weichang Zheng, Yu Yang, Mingcong Yang, Kun School of Information and Communication Engineering Yangtze Delta Region Institute University of Electronic Science and Technology of China Quzhou China Graduate School of Systems and Information Engineering University of Tsukuba Tsukuba Japan Huawei Technologies Department of R&d Wuhan China School of Information and Communication Engineering University of Electronic Science and Technology of China Sichuan China

We introduce spatial channel networks (SCNs) to the interconnection of data center networks (DCNs). We propose an integer linear programming (ILP) model to solve the routing and spectrum assignment problem for SCN-bas... 详细信息

ISBN: (纸本)9798350312614

关键词： datacenter network (DCN) integer linear programming (ILP) routing and spectrum assignment Spatial channel network (SCN)

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Virtual Contraction Approach to Decentralized Adaptive Stabilization of Nonlinear Time-Delayed Networks

arXiv

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arXiv 2025年

作者： Kawano, Yu Sun, Zhiyong Graduate School of Advanced Science and Engineering Hiroshima University Higashi-Hiroshima739-8527 Japan State Key Laboratory for Turbulence and Complex Systems Department of Mechanics and Engineering Science College of Engineering Peking University Beijing100871 China

In this paper, we utilize a diagonally dominant structure for the decentralized stabilization of unknown nonlinear time-delayed networks. Generalizing the idea of virtual contraction analysis to time-delayed systems, we demonstrate that nonlinear time-delayed networks can be stabilized by diagonal high-gains if the input matrices possess certain generalized (column/row) diagonally dominant properties. To achieve stabilization of unknown networks, we further propose a distributed adaptive tuning rule for each individual gain function, ensuring that all closed-loop trajectories converge to the origin. The effectiveness of the proposed decentralized adaptive control is verified in a case study on epidemic spreading control in SIS networks with transmission delays. © 2025, CC BY-NC-ND.

关键词： Electric delay lines

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Low-disturbance Nonlinear control of TBM Cutterhead Speed in Coal Mine Tunneling 50

Low-disturbance Nonlinear Control of TBM Cutterhead Speed in...

引用

50th Annual Conference of the IEEE Industrial Electronics Society, IECON 2024

作者： Liu, Nannan Wang, Tong Wang, Jianmin Fan, Yingda School of Electronic and Information Engineering Ningbo University of Technology Ningbo China Research Institute of Intelligent Control and Systems Harbin Institute of Technology Harbin China Department of Computer Science University of Pittsburgh Pittsburgh United States

ISBN: (纸本)9781665464543

To minimize the disturbance of the Tunnel Boring Machine (TBM) cutterhead on the surrounding rock during the coal mine roadway excavation process and ensure that the cutterhead rotation speed achieves fast tracking performance with minimal overshoot, we propose a direct adaptive robust control method for the cutterhead rotation speed hydraulic system based on inversion design. This method considers the strong disturbances such as loads and motion affecting the cutterhead hydraulic drive system, as well as the uncertainties in the cutterhead model. We establish the nonlinear model of the cutterhead hydraulic drive system and employ virtual control to reduce the model order. Using Lyapunov functions, we ensure the stability of the entire system and derive the control law for the cutterhead rotation speed controller, along with parameter-adaptive laws acting as parameter estimators. We validate the effectiveness of the proposed control strategy through joint simulation using AMESim and Simulink. The results show that the designed cutterhead rotation speed controller achieves high tracking accuracy and good adaptability. © 2024 IEEE.

关键词： Hydraulic drives

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Open Wireless Digital Twin: End-to-End 5G Mobility Emulation in O-RAN Framework

arXiv

引用

arXiv 2025年

作者： Iye, Tetsuya Sakamoto, Masaya Takaya, Shohei Sato, Eisaku Susukida, Yuki Nagaoka, Yu Maruta, Kazuki Nakazato, Jin Kozo Keikaku Engineering Inc. Tokyo Japan Department of Electronics and Computer Systems Graduate School of Engineering Takushoku University Tokyo Japan Department of Electrical Engineering Graduate School of Engineering Tokyo University of Science Tokyo Japan Graduate School of Information Science and Technology The University of Tokyo Tokyo Japan

This paper presents an end-to-end wireless digital twin platform constructed using open-source software and open data to enhance the evaluation of mobile communication systems. The proposed open wireless digital twin (OWDT) integrates OpenAirInterface (OAI) for 5G NR protocol stack emulation and NVIDIA Sionna RT for high-resolution ray tracing based radio propagation modeling. This integration enables realistic emulation of vehicular mobility scenarios, leveraging real-world geographic and building data to bridge the gap between theoretical simulations and real-world deployments. The platform utilizes ORAN’s Near-RT RIC via OAI FlexRIC to dynamically monitor key performance indicators (KPIs) such as RSRP, MCS, BLER, and throughput in real time. Through extensive evaluation in urban environments, this study demonstrates the validity of the emulation framework, revealing its capability to replicate real-world communication dynamics with high fidelity. The results underscore the potential of OWDT in accelerating wireless system development, reducing experimental costs, and optimizing network configurations. Copyright © 2025, The Authors. All rights reserved.

关键词： 5G mobile communication systems

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Construction and optimization of a computational holographic lithography system 8

Construction and optimization of a computational holographic...

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8th International Conference on Speckle Metrology, Speckle 2023

作者： Chen, Rui Lin, Angyi You, Jianfeng Lin, Huixiang Zhao, Wenqing Zhang, Fucai School of Control and Computer Engineering North China Electric Power University Baoding071003 China The Department of Electrical and Electronic Engineering Southern University of Science and Technology Shenzhen518055 China Engineering Research Center of Intelligent Computing for Complex Energy Systems Ministry of Education North China Electric Power University China

ISBN: (数字)9781510674592

ISBN: (纸本)9781510674585

Traditional lithography techniques are currently facing challenges, including high costs and the susceptibility of mask plates to damage. This research aims to elucidate the feasibility and technical constraints of a novel diffraction lithography approach. This method can reduce the size and cost of lithography machines, break through existing technological barriers, and offer new possibilities for the future development of lithography machines. We have built a basic computational holographic lithography system utilizing a 405nm laser and validated the system using holograms obtained with both classical GS algorithm and a newly proposed method. With the GS holograms, patterns with 700nm features have been successfully exposed on the photoresist. With our new algorithms, multiple holograms for the same target pattern can be generated with different settings in the algorithm. Sequential exposure of those holograms resulted in continuous lines 500 nm wide with reduced speckle artifacts, which was about a 1.4-time improvement over the result from the GS algorithm. Future research will focus on optimizing and enhancing the experimental system and the hologram calculation methods to reduce the line widths further and improve the exposure pattern quality. © COPYRIGHT SPIE. Downloading of the abstract is permitted for personal use only.

关键词： Holograms

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Progress and Knowledge Transfer from science to Technology in the Research Frontier of CRISPR Based on the LDA Model

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Journal of Data and Information science 2022年第1期7卷 1-19页

作者： Yushuang Lyu Muqi Yin Fangjie Xi Xiaojun Hu Medical Information Center and Department of Neurology of Affiliated Hospital 2Zhejiang University School of MedicineHangzhou 310058China Institute of Cyber-Systems and Control Zhejiang University School of Control Science and EngineeringHangzhou 310007China

Purpose:This study explores the underlying research topics regarding CRISPR based on the LDA model and figures out trends in knowledge transfer from science to technology in this area over the latest 10 ***/methodology/approach:We collected publications on CRISPR between 2011 and2020 from the Web of science,and traced all the patents citing them from ***.15,904 articles and 18,985 patents in total are downloaded and *** LDA model was applied to identify underlying research topics in related *** addition,some indicators were introduced to measure the knowledge transfer from research topics of scientific publications to IPC-4 classes of ***:The emerging research topics on CRISPR were identified and their evolution over time ***,a big picture of knowledge transition from research topics to technological classes of patents was *** found that for all topics on CRISPR,the average first transition year,the ratio of articles cited by patents,the NPR transition rate are respectively 1.08,15.57%,and 1.19,extremely shorter and more intensive than those of general ***,the transition patterns are different among research *** limitations:Our research is limited to publications retrieved from the Web of science and their citing patents indexed in ***.A limitation inherent with LDA analysis is in the manual interpretation and labeling of"topics".Practical implications:Our study provides good references for policy-makers on allocating scientific resources and regulating financial budgets to face challenges related to the transformative technology of ***/value:The LDA model here is applied to topic identification in the area of transformative researches for the first time,as exemplified on ***,the dataset of all citing patents in this area helps to provide a full picture to detect the knowledge transition between S&T.

关键词： CRISPR LDA model Knowledge transfer Transformative technology

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Performance evaluation of matrix factorization for fMRI data

arXiv

引用

arXiv 2023年

作者： Endo, Yusuke Takeda, Koujin Department of Mechanical Systems Engineering Graduate School of Science and Engineering Ibaraki University Japan

In the study of the brain, there is a hypothesis that sparse coding is realized in information representation of external stimuli, which is experimentally confirmed for visual stimulus recently. However, unlike the specific functional region in the brain, sparse coding in information processing in the whole brain has not been clarified sufficiently. In this study, we investigate the validity of sparse coding in the whole human brain by applying various matrix factorization methods to functional magnetic resonance imaging data of neural activities in the whole human brain. The result suggests sparse coding hypothesis in information representation in the whole human brain, because extracted features from sparse MF method, SparsePCA or MOD under high sparsity setting, or approximate sparse MF method, FastICA, can classify external visual stimuli more accurately than non-sparse MF method or sparse MF method under low sparsity setting. Copyright © 2023, The Authors. All rights reserved.

关键词： Brain

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Internal waste dump stability analysis: insights from numerical simulations

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Discover Geoscience 2025年第1期3卷 1-16页

作者： Enkhbold, Bilguun Ikeda, Hajime Toriya, Hisatoshi Adachi, Tsuyoshi Department of Geosciences Geotechnology and Materials Engineering for Resources Graduate School of International Resource Sciences Akita University Akita Japan Department of Systems Control and Information Engineering National Institute of Technology Asahikawa College Asahikawa Japan

In Mongolia, the “Baganuur” lignite coal mine is one of the largest open-pit mines; however, the stability of its internal dump is very difficult to maintain, which hinders the mine’s normal operation and negatively influences the economy. To solve this internal waste dump slope stability problem, we studied the use of rock materials’ inherent mechanical properties to conduct numerical modelling and analysis on improved internal waste dump parameters using Gaussian Elimination-based Rocscience RS2 software. Finite element methods were used to determine the factors that could impact the stability of an internal waste dump based on the properties of the rock. For this research, we investigated whether single- and multi-dumps impacted internal dump height and dip angle and covered the analytical approach used to determine safety factors. The internal dump capacity can be increased by around 1.9 times at a 50 m height and a 28° dip angle, according to the results of the numerical simulation models. This research offers an optimal strength reduction factor (SRF) at a height of 45 m and a dip angle of 28° in comparable situations. Numerical simulations show that dip angle changes impact internal dump slope stability more than dump height modifications.

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Phase evolution and properties of glass ceramic foams prepared by bottom ash,fly ash and pickling sludge

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International Journal of Minerals,Metallurgy and Materials 2022年第3期29卷 563-573页

作者： Junjie Zhang Xiaoyan Zhang Bo Liu Christian Ekberg Shizhen Zhao Shengen Zhang Institute for Advanced Materials and Technology University of Science and Technology BeijingBeijing 100083China Shunde Graduate School University of Science and Technology BeijingFoshan 528399China Nuclear Chemistry and Industrial Material Recycling Department of Chemistry and Chemical EngineeringChalmers University of TechnologyGothenburg 41296Sweden

Municipal solid waste incineration products of bottom ash(BA),fly ash(FA),and pickling sludge(PS),causing severe environ-mental pollution,were transformed into glass ceramic foams with the aid of CaCO3 as a pore-foaming agent during *** effect of the BA/FA mass ratio on the phase composition,pore morphology,pore size distribution,physical properties,and glass structure was investigated,with results showing that with the increase in the BA/FA ratio,the content of the glass phase,Si-O-Si,and Q3Si units decrease *** glass transmission temperature of the mixture was also *** combined,the glass viscosity decreases,causing bubble coalescence and uneven pore *** ceramic foams with uniform spherical pores are *** the content of BA,FA,and PS are 35wt%,45wt%,and 20wt%,respectively,contributing to high performance glass ceramic foams with a bulk density of 1.76 g/cm3,porosity of 56.01%,and compressive strength exceeding 16.23 *** versatile and low-cost approach provides new insight into synergistically recycling solid wastes.

关键词： glass ceramic foams bottom ash fly ash picking sludge pore structure glass units

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Oral administration microrobots for drug delivery

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Bioactive Materials 2024年第9期39卷 163-190页

作者： An Ren Jiarui Hu Changwei Qin Neng Xia Mengfei Yu Xiaobin Xu Huayong Yang Min Han Li Zhang Liang Ma State Key Laboratory of Fluid Power and Mechatronic Systems Zhejiang UniversityHangzhou 310058China School of Mechanical Engineering Zhejiang UniversityHangzhou 310058China Department of Mechanical and Automation Engineering The Chinese University of Hong KongShatin NTHong Kong SARChina The Affiliated Stomatologic Hospital School of MedicineZhejiang UniversityHangzhou 310003China Key Laboratory of Advanced Civil Engineering Materials of Ministry of Education Key Laboratory of D&A for Metal-Functional MaterialsSchool of Materials Science&EngineeringTongji UniversityShanghai201804 China Institute of Pharmaceutics Zhejiang Province Key Laboratory of Anti-Cancer Drug ResearchCollege of Pharmaceutical SciencesZhejiang UniversityHangzhou310058China

Oral administration is the most simple, noninvasive, convenient treatment. With the increasing demands on thetargeted drug delivery, the traditional oral treatment now is facing some challenges: 1) biologics how toimplement the oral treatment and ensure the bioavailability is not lower than the subcutaneous injections;2)How to achieve targeted therapy of some drugs in the gastrointestinal tract? Based on these two issues, drugdelivery microrobots have shown great application prospect in oral drug delivery due to their characteristics offlexible locomotion or driven ability. Therefore, this paper summarizes various drug delivery microrobotsdeveloped in recent years and divides them into four categories according to different driving modes: magneticcontrolleddrug delivery microrobots, anchored drug delivery microrobots, self-propelled drug delivery microrobotsand biohybrid drug delivery microrobots. As oral drug delivery microrobots involve disciplines such asmaterials science, mechanical engineering, medicine, and control systems, this paper begins by introducing thegastrointestinal barriers that oral drug delivery must overcome. Subsequently, it provides an overview of typicalmaterials involved in the design process of oral drug delivery microrobots. To enhance readers’ understanding ofthe working principles and design process of oral drug delivery microrobots, we present a guideline for designingsuch microrobots. Furthermore, the current development status of various types of oral drug delivery microrobotsis reviewed, summarizing their respective advantages and limitations. Finally, considering the significantconcerns regarding safety and clinical translation, we discuss the challenges and prospections of clinical translationfor various oral drug delivery microrobots presented in this paper, providing corresponding suggestions foraddressing some existing challenges.

关键词： Microrobots Gastrointestinal tract Oral administration Drug delivery Biologics

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