检索结果-内蒙古大学图书馆

2024 international conference on New Trends in Computational Intelligence, NTCI 2024

作者： Sun, Haolu Yang, Xinghao Liu, Baodi Liu, Weifeng College of Control Science and Engineering Qingdao China

ISBN: (纸本)9798331517021

Recent research indicates that automatic speech recognition (ASR) systems are highly susceptible to adversarial examples. Current ASR attack methods can be divided into two categories: audio-dependent and audio-independent attacks, based on whether they rely on benign audio inputs. Among them, the Speech Synthesizing based Attack (SSA), a typical audio-independent method, has gained significant attention due to its flexibility and generalizability. However, SSA suffers from low attack efficiency owing to the complex structure of the VITS decoder. To alleviate this problem, we propose a novel ASR attack method called Short-time Fourier Inversion-based Multi-band Generation (SFI-MG), which offers two main advantages. Firstly, we employ an improved inverse short-time Fourier transform (iSTFT) to optimize the traditional residual blocks, accelerating the upsampling process. Secondly, we introduce a pseudo-orthogonal mirror filter bank module to enable parallel processing across multiple frequency bands, thereby enhancing both processing speed and speech quality. Comprehensive experiments on the Common Voice, Librispeech, and VCTK datasets demonstrate that our adversarial examples not only improve attack efficiency by 210%, but also achieve a high success rate in targeted attacks. © 2024 IEEE.

关键词： Inverse problems

来源：评论

学校读者我要写书评

暂无评论

Mechanical Modelling and Dynamic Characterization of Multi-Rigid-Flexible Planetary systems: Multi-Rigid-Flexible Planetary systems

Mechanical Modelling and Dynamic Characterization of Multi-R...

引用

Data-driven Optimization of complex systems (DOCS), international conference on

作者： Ming Li Bo Fan Wanyu Jiang Liyang Xie School of Mechatronics Engineering Shenyang Aerospace University Shenyang China Key Laboratory of Vibration and Control of Aero-Propulsion System Ministry of Education Northeastern University Shenyang China

ISBN: (数字)9798350377842

ISBN: (纸本)9798350377859

Planetary transmission gears are widely used in the aerospace field, yet there is a scarcity of analysis and design tools specifically for planetary systems. In this paper, a three-dimensional dynamic gear tooth mesh load distribution model for planetary gear systems is proposed, which can take into account the influence of factors such as tooth side clearance, gear support stiffness, and tooth surface load distribution on the dynamic root stress of the system. A numerical integration strategy is combined with an elastic contact iteration algorithm to solve the multi-body dynamics solution problem. This approach inherently captures mesh stiffness fluctuations without the need for an empirical mesh stiffness formulation or transfer error excitation of the system. The dynamic root stress response of the parametrically excited system under different gear meshing phase conditions is investigated using this model. The results discussed not only demonstrate that the model in this paper can provide the necessary information for fatigue failure analysis and reliability prediction of planetary systems with multi-scale geometrical variables, but also reinforce the need for such computationally efficient models for design purposes.

关键词： Analytical models Solid modeling Gears Computational modeling Heuristic algorithms Predictive models Aerodynamics Reliability engineering Stress Optimization

来源：评论

学校读者我要写书评

暂无评论

Intelligent control technology and equipment for truck drivers in opencut coal mine

Intelligent control technology and equipment for truck drive...

引用

2022 international conference on Advanced Manufacturing Technology and Manufacturing systems, ICAMTMS 2022

作者： Li, Zongwei China Mining Products Safety Approval and Certification Center Co. Ltd No. 5 Qingniangou Road Hepingli Chaoyang District Beijing China

ISBN: (纸本)9781510656840

In view of the problems commonly existing in the truck outsourcing team of open-pit coal mine, such as complex personnel identity, employment without certificate, employment with expired contract, insurance, health certificate and other documents, and even the re employment of personnel who have made serious mistakes, combined with the characteristics of truck operation in open-pit coal mine, this paper puts forward two kinds of intelligent management and control technologies and equipment for trucks and drivers. The first technology and equipment adopts the way of deploying intelligent monitoring and inspection posts at the operation site, and adopts Bluetooth transceiver technology to effectively control trucks and drivers. The intelligent inspection posts cooperate with the monitoring center to form a regional management and control system. The second technology and equipment adopts the way of distributing intelligent terminals to all trucks and truck drivers, and adopts video intelligent technology to realize the intelligent control of trucks and drivers,The intelligent terminals and the monitoring center form a full-scale dynamic supervision network to effectively ensure the production safety of the whole area. The two control technologies and equipment are comprehensively evaluated, and the development direction of intelligent open-pit coal mine is prospected. © 2022 SPIE.

关键词： Coal mines

来源：评论

学校读者我要写书评

暂无评论

Study of Functional And Instrumental Heterogeneity of the Problem of Assessing the Patients' Body State

Study of Functional And Instrumental Heterogeneity of the Pr...

引用

international conference on control systems, Mathematical Modelling, Automation and Energy Efficiency (SUMMA)

作者： Sophiya Rumovskaya Sergey Listopad Alexandr Luchko KB FRCCSCRAS Kaliningrad Russia Avtotor Information Technologies LLC Kaliningrad Russia

ISBN: (数字)9798331532178

ISBN: (纸本)9798331532185

A workload of doctors increases significantly every year due to the growing volume and variety of processed often atypical and ambiguous symptomatic information, information on the etiology, and pathogenesis of diseases. This often leads to fatal errors in assessing the patients' body state (diagnostic and prognostic). This work is devoted to the definition of specific features of the decomposition of the problem of assessing the patients' body state and assessing the functional heterogeneity of the problem. We also presented the results of the choice of basic methods for solving tasks from the structure of such problems as well as the results of the selection of autonomous methods for solving tasks from the decomposition of the problem under the study considered on the example of acute pancreatitis (assessment of instrumental heterogeneity).

关键词： Automation Instruments Pathogenesis Medical services control systems Mathematical models Energy efficiency Diseases

来源：评论

学校读者我要写书评

暂无评论

Learning of Balance controller Considering Changes in Body State for Musculoskeletal Humanoids

Learning of Balance Controller Considering Changes in Body S...

引用

IEEE/RSJ international conference on Intelligent Robots and systems (IROS)

作者： Kawaharazuka, Kento Ribayashi, Yoshimoto Miki, Akihiro Toshimitsu, Yasunori Suzuki, Temma Okada, Kei Inaba, Masayuki Univ Tokyo Grad Sch Informat Sci & Technol Dept Mechanoinformat Bunkyo Ku 7-3-1 Hongo Tokyo 1138656 Japan

ISBN: (数字)9781665479271

ISBN: (纸本)9781665479271

The musculoskeletal humanoid is difficult to modelize due to the flexibility and redundancy of its body, whose state can change over time, and so balance control of its legs is challenging. There are some cases where ordinary PID controls may cause instability. In this study, to solve these problems, we propose a method of learning a correlation model among the joint angle, muscle tension, and muscle length of the ankle and the zero moment point to perform balance control. In addition, information on the changing body state is embedded in the model using parametric bias, and the model estimates and adapts to the current body state by learning this information online. This makes it possible to adapt to changes in upper body posture that are not directly taken into account in the model, since it is difficult to learn the complete dynamics of the whole body considering the amount of data and computation. The model can also adapt to changes in body state, such as the change in footwear and change in the joint origin due to recalibration. The effectiveness of this method is verified by a simulation and by using an actual musculoskeletal humanoid, Musashi.

关键词： Adaptation models PI control Computational modeling Redundancy Humanoid robots Footwear Muscles

来源：评论

学校读者我要写书评

暂无评论

Spatial-temporal optimal dispatch of mobile energy storage for emergency power supply

引用

ENERGY REPORTS 2022年 8卷 322-329页

作者： Ma Shiqian Xiang Tianchun Hou Kai Liu Zeyu Tang Puting Qi Ning State Grid Tianjin Elect Power Res Inst Tianjin 300384 Peoples R China State Grid Tianjin Elect Power Co Tianjin 300010 Peoples R China Tianjin Univ Key Lab Smart Grid Minist Educ Tianjin 300072 Peoples R China Tsinghua Univ State Key Lab Control & Simulat Power Syst & Gene Beijing 100084 Peoples R China

Mobile energy storage (MES) is a typical flexible resource, which can be used to provide an emergency power supply for the distribution system. However, it is inevitable to consider the complicated coupling relations of mobile energy storage, transportation network, and power grid, which can cause issues of complex modeling and low efficiency. To address that, this paper proposes a mobile energy storage dispatch model to minimize the load curtailment. The framework of rolling optimization is established to update the optimal strategy with the real-time factors, including grid, transportation, and MES. To increase solving efficiency, the model is extended to a mixed integer second-order cone programming model. Finally, the simulation results demonstrate the effectiveness of the proposed method in various scenarios. (C) 2021 The Author(s). Published by Elsevier Ltd.

关键词： Mobile energy storage Emergency power supply Path planning Energy storage power dispatch Rolling optimization

来源：评论

学校读者我要写书评

暂无评论

Rolling the Dice – Rethinking the RAMI 4.0 Perspectives

Rolling the Dice – Rethinking the RAMI 4.0 Perspectives

引用

international conference on Emerging Technologies and Factory Automation (ETFA)

作者： Kristof Meixner David Hoffmann Sarah Riedmann Paula Hünecke Christoph Binder Christian Doppler Laboratory SQI Inst. of Information Systems Engineering TU Wien Institute of Ergonomics Manufacturing Systems and Automation Otto-von-Guericke U. Germany Josef Ressel Center for Dependable System-of-Systems Engineering Austria

ISBN: (数字)9798350361230

ISBN: (纸本)9798350361247

As developing current or future industrial systems becomes increasingly complex, new methods for understandably structuring those systems need to arise. The Reference Architectural Model Industrie 4.0 (RAMI 4.0) provides a framework for describing intermingled industrial applications in the context of Cyber-Physical Production systems (CPPSs). However, although RAMI 4.0 has been standardized for almost a decade, it still lacks actual industrial applications. Recent use cases have shown that the three-dimensional layout might be oversimplified for describing system architectures. Specifically, problems with the so-called live-cycle axis, which has shown significant shortcomings in capturing the dynamics of industrial processes, need to be tackled. This paper provides an analysis of RAMI 4.0 and an assessment of shortcomings that hinder its applicability. It presents alternative approaches that address these limitations by proposing modifications or replacements of parts of RAMI 4.0. Based on the paper's insights, we provide the research agenda for engineering future manufacturing systems, considering it a base for follow-up projects to ensure industrial readiness.

关键词： Industries Industrial control Layout systems architecture Collaboration Rigidity complexity theory Standards Manufacturing automation Context modeling

来源：评论

学校读者我要写书评

暂无评论

Combined Plant and control Co-design via Solutions of Hamilton-Jacobi-Bellman Equation Based on Physics-informed Learning

Combined Plant and Control Co-design via Solutions of Hamilt...

引用

international Symposium on Soft Computing and Intelligent systems (SCIS)

作者： Kenjiro Nishimura Hikaru Hoshino Eiko Furutani Department of Electrical Materials and Engineering University of Hyogo Hyogo Japan

ISBN: (数字)9798350373332

ISBN: (纸本)9798350373349

This paper addresses integrated design of engineering systems, where physical structure of the plant and controller design are optimized simultaneously. To cope with uncertainties due to noises acting on the dynamics and modeling errors, an Uncertain control Co-design (UCCD) problem formulation is proposed. Existing UCCD methods usually rely on uncertainty propagation analyses using Monte CaIro methods for open-loop solutions of optimal control, which suffer from stringent trade-offs among accuracy, time horizon, and computational time. The proposed method utilizes closed-loop solutions characterized by the Hamilton-Jacobi-Bellman equation, a Partial Differential Equation (PDE) defined on the state space. A solution algorithm for the proposed UCCD formulation is developed based on PDE solutions of Physics-informed Neural Networks (PINNs). Numerical examples of regulator design problems are provided, and it is shown that simultaneous update of PINN weights and the design parameters effectively works for solving UCCD problems.

关键词： Uncertainty Regulators Partial differential equations Neural networks Noise Optimal control Process control Reinforcement learning Mathematical models Robots

来源：评论

学校读者我要写书评

暂无评论

Model-Free Tracking control for Non-Affine Lipschitz Unmanned Aerial Vehicle systems

Model-Free Tracking Control for Non-Affine Lipschitz Unmanne...

引用

IEEE international conference on Automation, Electronics and Electrical Engineering (AUTEEE)

作者： Yiwen Lu Hohai University Changzhou China

ISBN: (数字)9798350377033

ISBN: (纸本)9798350377040

This study addresses the challenges of controlling nonlinear low-altitude aerial vehicles in complex environments by proposing a model-free adaptive control (MFAC) framework based on improved dynamic linearization techniques. By constructing an equivalent linear data model and incorporating an online parameter estimation algorithm, the proposed method enables real-time control of nonlinear low-altitude aerial vehicles and enhances resilience against denial-of-service (DoS) attacks. Simulation results demonstrate that the proposed approach significantly outperforms traditional methods in terms of accuracy, response speed, and robustness, particularly under data packet loss scenarios, exhibiting stable control precision and high resource utilization efficiency.

关键词： Adaptation models Accuracy Heuristic algorithms Computational modeling Estimation Robustness Real-time systems Data models Vehicle dynamics Adaptive control

来源：评论

学校读者我要写书评

暂无评论

Model Predictive control of Cable-Driven Parallel Robot with Cable Sagging: an Assumed Mode Approach

Model Predictive Control of Cable-Driven Parallel Robot with...

引用

international conference on System Theory, control, and Computing (ICSTCC)

作者： Karim Moussa Antoine Vié Maxime Thieffry Fabien Claveau Philippe Chevrel IMT Atlantique IRT Jules Verne LS2N UMR CNRS 6004 Nantes Université Nantes France École Centrale Nantes IMT Atlantique CNRS LS2N UMR 6004 Nantes Université Nantes France

ISBN: (数字)9798350364293

ISBN: (纸本)9798350364309

Cable-Driven Parallel Robots (CDPRs) are a type of parallel robots that uses cables to position a moving platform inside its workspace. The cables offer many advantages from an operational point of view, from increasing the size of the workspace to handling heavy loads. However, they raise an issue in modeling their complex physical behavior. Simplifying hypotheses are usually made to facilitate the incorporation of a model in the control law in certain operational conditions, such as straight and massless cables. In this work, a Quasi-Linear Model Predictive control (QLMPC) is presented based on a flexible cable model and is tested on some challenging scenarios. The cable model is based on the assumed mode approach. A comparison in simulation is made with a model predictive control based on a straight and inelastic cable for an eight-cables 3D suspended CDPR.

关键词： Parallel robots Three-dimensional displays Computational modeling Predictive models control systems Tuning Standards Cables Predictive control Load modeling

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：