检索结果-内蒙古大学图书馆

arXiv 2022年

作者： Zheng, Kaikai Shi, Dawei Chen, Tongwen State Key Laboratory of Intelligent Control and Decision of Complex Systems School of Automation Beijing Institute of Technology Beijing100081 China Department of Electrical and Computer Engineering University of Alberta EdmontonABT6G 1H9 Canada

This work attempts to discuss the observability of linear time-invariant systems with event-triggered measurements. A new notion of observability, namely, ǫ-observability is defined with parameter ǫ, which relates to the worst-case performance of inferring the initial state based on not only the received measurement but also the implicit information in the event-triggering conditions at no-event instants. A criterion is developed to test the proposed ǫ-observability of discrete-time linear systems, based on which an iterative event-triggered set-membership observer is designed to evaluate a set containing all possible values of the state. The proposed set-membership observer is designed as the outer approximation of the ellipsoids predicted based on previous state estimates and the ellipsoids inferred by fusing the received measurement and communication conditions, which is optimal in the sense of trace at each step and is proved to be asymptotically bounded. The efficiency of the proposed event-triggered set-membership state observer is verified by numerical experiments. © 2022, CC BY.

关键词： State estimation

来源：评论

学校读者我要写书评

暂无评论

Publisher's Note: “A Perspective on ferroelectricity in hafnium oxide: Mechanisms and considerations regarding its stability and performance” [Appl. Phys. Lett. 121, 240502 (2022)]

引用

Applied Physics Letters 2023年第1期122卷

作者： Jon F. Ihlefeld Samantha T. Jaszewski Shelby S. Fields 1Department of Materials Science and Engineering University of Virginia Charlottesville Virginia 22904 USA 2Charles L. Brown Department of Electrical and Computer Engineering University of Virginia Charlottesville Virginia 22904 USA

This article was originally published online on 14 December 2022 with an error in Ref. 143. It is correct as it appears below.

关键词：

来源：评论

学校读者我要写书评

暂无评论

Fishery marketplace mobile app using progressive web application for fishermen to support local products during the Covid-19 pandemic

引用

AIP Conference Proceedings 2023年第1期2772卷

作者： Dwi Ely Kurniawan Afdhol Dzikri Nanna Suryana Herman 1Department of Informatics Engineering Politeknik Negeri Batam Batam - INDONESIA 2Department of Multimedia and Network Engineering Politeknik Negeri Batam Batam - INDONESIA 3Department of Software Engineering University Malaysia of Computer Science & Engineering UNIMY Selangor - MALAYSIA

Since the Covid-19 pandemic, the growth of E-commerce in Indonesia has increased sharply. Due to the shift in human habits or activities from offline to online. However, the lack of facilities and infrastructure is a problem fisher face when they want to distribute their catch. This study develops an online marketplace to provide convenience for fishers in marketing their catch. This study aims to create a Customer to Customer (C2C) marketing system model with Progressive Web Application (PWA) technology. PWAs can develop applications in a fast, reliable, and attractive user experience. The product display uses the closest distance calculation based on the region category. Transactions are limited to using the COD system to adjust to the background of knowledge, trust, and customer convenience. The development research results show that the system can work well following the analysis of user needs.

关键词：

来源：评论

学校读者我要写书评

暂无评论

Sequential quantum simulation of spin chains with a single circuit QED device

arXiv

引用

arXiv 2023年

作者： Zhang, Yuxuan Jahanbani, Shahin Riswadkar, Ameya Shankar, S. Potter, Andrew C. Department of Physics University of Texas at Austin AustinTX78712 United States Department of Physics Centre for Quantum Information and Quantum Control University of Toronto 60 Saint George St. TorontoONM5S 1A7 Canada Department of Physics University of California BerkeleyCA94720 United States Department of Electrical and Computer Engineering University of Texas at Austin AustinTX78712 United States Department of Physics and Astronomy Stewart Blusson Quantum Matter Institute University of British Columbia VancouverBCV6T 1Z1 Canada

Quantum simulation of many-body systems in materials science and chemistry are promising application areas for quantum computers. However, the limited scale and coherence of near-term quantum processors pose a significant obstacle to realizing this potential. Here, we theoretically outline how a single-circuit quantum electrodynamics (cQED) device, consisting of a transmon qubit coupled to a long-lived cavity mode, can be used to simulate the ground state of a highly-entangled quantum many-body spin chain. We exploit recently developed methods for implementing quantum operations to sequentially build up a matrix product state (MPS) representation of a many-body state. This approach re-uses the transmon qubit to read out the state of each spin in the chain and exploits the large state space of the cavity as a quantum memory encoding inter-site correlations and entanglement. We show, through simulation, that analog (pulse-level) control schemes can accurately prepare a known MPS representation of a quantum critical spin chain in significantly less time than digital (gate-based) methods, thereby reducing the exposure to decoherence. We then explore this analog-control approach for the variational preparation of an unknown ground state. We demonstrate that the large state space of the cavity can be used to replace multiple qubits in a qubit-only architecture, and could therefore simplify the design of quantum processors for materials simulation. We explore the practical limitations of realistic noise and decoherence and discuss avenues for scaling this approach to more complex problems that challenge classical computational methods. © 2023, CC BY-SA.

关键词： Ground state

来源：评论

学校读者我要写书评

暂无评论

Data analysis of varied datasets using descriptive and predictive analytics in terms of time and accuracy

引用

AIP Conference Proceedings 2022年第1期2519卷

作者： Srikanth Kapse S. Zahoor Ul Huq A. P. Siva Kumar 1Department of Computer Science & Engineering JNTUA Anantapuramu India 2G. Pulla Reddy Engineering College Kurnool India

To anticipate the choice dependent on recorded information is conceivable through Predictive Analytics. Machine learning calculations are arranged into four classifications: supervised, unsupervised, semi-supervised, and reinforcement learning. Be that, as it may, in this paper, we will consider supervised learning. The working of supervised learning algorithms is to prepare informational collection as information, which comprises features and class names for learning. Prior to learning, descriptive analytics is applied to authentic information to comprehend the highlights and their effect on preparing. When learning is finished, the classifier is applied on informational test collection or constant informational index, which comprises just features. The classifier needs to foresee the class name, which is obscure in the informational test index. Here we examine a portion of the famous supervised learning algorithms like SMO, Naïve Bayes, J48, Random Forest, k-NN and the performance of these algorithms on different datasets based on time and accuracy. ML algorithms can be applied on different applications, such as email messages as spam or non-spam, an estimate of client purchasing conduct dependent on recorded deals information, oddity location, misrepresentation disclosure, cancer detection, diabetes prediction, etc. Our outcomes anticipated that SMO is best at exactness and IBk is best at preparing rapidly.

关键词：

来源：评论

学校读者我要写书评

暂无评论

The multi-segment controller of a flexible arm 52

The multi-segment controller of a flexible arm

引用

52nd International Symposium on Robotics, ISR 2020

作者： Leniowski, Ryszard Leniowska, Lucyna Department of Computer and Control Engineering Rzeszów University of Technology Al. Powstañców Warszawy 12 Rzeszów35-959 Poland Department of Mechatronics and Control Engineering University of Rzeszów ul. Prof. St. Pigonia 1 Rzeszów35-959 Poland

ISBN: (纸本)9783800754298

The aim of this paper is to present an active and effective method for shaping the local three-dimensional defor-mation. It is based on a proposed device called a "segment controller"and it can reduce vibrations of flexible structures like for example, a lightweight robot arm. One possible solution is an appropriate local controller that uses the principle of energy flow, measured at arm nodes. The designed controller consists of a chain of active piezoelectric segments. The control force is determined on the basis of the local stress measurement of the current segment and its neighbours. The segment controller uses the RST (Reference Signal Tracking) structure, so tracking and regulation can be tuned in-dependently. Its coefficients were determined from symbolic manipulations of Diophantine equation. In order to exam-ine the capabilities of the method the linearized robot arm model is considered. The transfer functions of the system in question were derived using the FEM method with 5- order Hermite polynomials as base functions. Model is tuned with the innovative templates method, which allows getting the best match for the assumed criteria. The results of simulation tests show that the proposed "segment controller"reduces vibration of a flexible light arm effectively, changes the arm deflection, and is resistant to damage to some chain segments. It has been shown that the robustness of the device strongly depends on the location of segment actuators along the flexible arm, and is high for distribution in accordance with the principle of the "golden section". © 2020 VDE Verlag GMBH.

关键词： controllers

来源：评论

学校读者我要写书评

暂无评论

Offboard Occupancy Refinement with Hybrid Propagation for Autonomous Driving

arXiv

引用

arXiv 2024年

作者： Shi, Hao Wang, Song Zhang, Jiaming Yin, Xiaoting Wang, Zhongdao Wang, Guangming Zhu, Jianke Yang, Kailun Wang, Kaiwei The State Key Laboratory of Extreme Photonics and Instrumentation The National Engineering Research Center of Optical Instrumentation Zhejiang University Hangzhou310027 China The School of Robotics The National Engineering Research Center of Robot Visual Perception and Control Technology Hunan University Changsha410082 China The College of Computer Science and Technology Zhejiang University Hangzhou310027 China The Institute for Anthropomatics and Robotics Karlsruhe Institute of Technology Karlsruhe76131 Germany Huawei Noah’s Ark Lab. Canada The Department of Engineering University of Cambridge CambridgeCB2 1PZ United Kingdom

Vision-based occupancy prediction, also known as 3D Semantic Scene Completion (SSC), presents a significant challenge in computer vision. Previous methods, confined to onboard processing, struggle with simultaneous geometric and semantic estimation, continuity across varying viewpoints, and single-view occlusion. Our paper introduces OccFiner, a novel offboard framework designed to enhance the accuracy of vision-based occupancy predictions. OccFiner operates in two hybrid phases: 1) a multi-to-multi local propagation network that implicitly aligns and processes multiple local frames for correcting onboard model errors and consistently enhancing occupancy accuracy across all distances. 2) the region-centric global propagation, focuses on refining labels using explicit multi-view geometry and integrating sensor bias, especially to increase the accuracy of distant occupied voxels. Extensive experiments demonstrate that OccFiner improves both geometric and semantic accuracy across various types of coarse occupancy, setting a new state-of-the-art performance on the SemanticKITTI dataset. Notably, OccFiner elevates vision-based SSC models to a level even surpassing that of LiDAR-based onboard SSC models. Furthermore, OccFiner is the first to achieve automatic annotation of SSC in a purely vision-based approach. Quantitative experiments prove that OccFiner successfully facilitates occupancy data loop-closure in autonomous driving. Additionally, we quantitatively and qualitatively validate the superiority of the offboard approach on city-level SSC static maps. The source code will be made publicly available at https://***/MasterHow/OccFiner. Copyright © 2024, The Authors. All rights reserved.

关键词： Semantic Segmentation

来源：评论

学校读者我要写书评

暂无评论

Kafka based LSTM model for streaming data prediction

引用

AIP Conference Proceedings 2022年第1期2444卷

作者： S. Geetha V. Kalaivani 1Department of Computer Applications Mepco Schlenk Engineering College Sivakasi Tamil Nadu India 2Department of Computer Science and Engineering National Engineering College Kovilpatti Tamil Nadu India

In the current technological world, the data is getting generated abundantly through various sources. The time dependent data generated through sensors is one among them. The most of the time dependent or time series data is streaming in real-time onfixed flow rates and sometimes, it will be on variation. When there is a change or no change in the flow of data, the existing state of the art prediction models provides low accuracy of prediction. Hence, it is proposed to have better accuracy of prediction on the streaming data with LSTM and Kafka Framework. The Kafka-LSTM model performed much better than the other conventional models. The models were evaluated using mean absolute error and root mean square error. The proposed method performs with better accuracy and reduced error rate than the other conventional models.

关键词：

来源：评论

学校读者我要写书评

暂无评论

FaSTrack:A Modular Framework for Real-Time Motion Planning and Guaranteed Safe Tracking

FaSTrack:A Modular Framework for Real-Time Motion Planning a...

引用

作者： Chen, Mo Herbert, Sylvia L. Hu, Haimin Pu, Ye Fisac, Jaime Fernandez Bansal, Somil Han, Soojean Tomlin, Claire J. School of Computing Science Simon Fraser University BurnabyBCV5A 1S6 Canada Department of Mechanical and Aerospace Engineering University of California San Diego San DiegoCA92122 United States Department of Electrical Engineering Princeton University PrincetonNJ08536 United States Department of Electrical and Electronic Engineering University of Melbourne ParkvilleVIC3010 Australia Department of Electrical Engineering and Computer Sciences University of California Berkeley BerkeleyCA94704 United States Control and Dynamical Systems Program California Institute of Technology Los AngelesCA90019 United States

Real-time, guaranteed safe trajectory planning is vital for navigation in unknown environments. However, real-time navigation algorithms typically sacrifice robustness for computation speed. Alternatively, provably safe trajectory planning tends to be too computationally intensive for real-time replanning. We propose FaSTrack, Fast and Safe Tracking, a framework that achieves both real-time replanning and guaranteed safety. In this framework, real-time computation is achieved by allowing any trajectory planner to use a simplified planning model of the system. The plan is tracked by the system, represented by a more realistic, higher dimensional tracking model. We precompute the tracking error bound (TEB) due to mismatch between the two models and due to external disturbances. We also obtain the corresponding tracking controller used to stay within the TEB. The precomputation does not require prior knowledge of the environment. We demonstrate FaSTrack using Hamilton-Jacobi reachability for precomputation and three different real-time trajectory planners with three different tracking-planning model pairs. © 1963-2012 IEEE.

关键词： Real time systems

来源：评论

学校读者我要写书评

暂无评论

High bit rate modulation approach used by new generation mobile technology

引用

AIP Conference Proceedings 2023年第1期2591卷

作者： Zainab Faydhe Al-Azzawi Fatima Faydhe Al-Azzawi Wissam Fadhal Abid Batool Faydhe Al-Azzawi 1Department of Computer Technology Engineering AL-Mansour University College Baghdad Iraq 2Electronics Technical Department Institute of Technology/ Baghdad Middle Technical University (MTU) Baghdad Iraq

Every year there is improving in the connection speed of mobile communication technology. Due to market requirements the wireless communication improves in addition of speed the reliability and functionality improves too. For digital telecommunication systems QAM considered as a modulation scheme, such as in 802.11 Wi-Fi standards. Efficiencies with high spectral can be done with QAM with a size of constellation that are suitable for specific application, limitation occur only by linearity of the communications channel and the noise level. In this paper 64 QAM modulator design, implemented and waveform generated using MATLAB Simulink with binary and gray symbol mapping, PN9 and 15-bit source, with Normal Raised Cosine NRC and Root Raised Cosine RRC filter effect on both time and frequency domain.

关键词：

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：