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The basic set of test problems for ODE system solvers

IOP Conference Series: Materials Science and engineering 2019年第1期630卷

作者： Vladimir Manichev Dmitriy Zhuk Emiliy Feldman BMSTU Robotics and Complex Automation Department Computer Aided Design and Engineering 105005 Moscow Russia

Known mathematical packages, MATLAB, Maple, Mathematica, MathCAD and others may get wrong, often plausible, the result of numerical solution of ODE systems with low, given by default, the requirements for mathematical accuracy of the results of the numerical solution of ODE systems. Since ODE system parameters obtained usually experimental, with a low mathematical precision, so the requirements for the precision of the results of mathematical solutions of ODE systems is low (for example, in MATLAB package required precision is 0.001). The article offers a basic set of tests to assess the range of applicability of the relevant solvers. The basic set of test problems for ODE solvers systems include linear ODE systems with the known analytic solution and nonlinear systems with known graphics solution. Presented comparative results of solutions for proposed problems using MATLAB solvers and manzhuk program from a library of standard mathematical programs SADEL (Sets of Algebraic and Differential Equations solvers Library), which has been designed for reliable and accurate solving of systems of linear algebraic equations (LAE) and ODE systems. The results can be used in mathematical modeling of dynamic systems described by ODE systems.

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Learn2Reg: comprehensive multi-task medical image registration challenge, dataset and evaluation in the era of deep learning

arXiv

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arXiv 2021年

作者： Hering, Alessa Hansen, Lasse Mok, Tony C.W. Chung, Albert C.S. Siebert, Hanna Häger, Stephanie Lange, Annkristin Kuckertz, Sven Heldmann, Stefan Shao, Wei Vesal, Sulaiman Rusu, Mirabela Sonn, Geoffrey Estienne, Théo Vakalopoulou, Maria Han, Luyi Huang, Yunzhi Yap, Pew-Thian Brudfors, Mikael Balbastre, Yaël Joutard, Samuel Modat, Marc Lifshitz, Gal Raviv, Dan Lv, Jinxin Li, Qiang Jaouen, Vincent Visvikis, Dimitris Fourcade, Constance Rubeaux, Mathieu Pan, Wentao Xu, Zhe Jian, Bailiang De Benetti, Francesca Wodzinski, Marek Gunnarsson, Niklas Sjölund, Jens Grzech, Daniel Qiu, Huaqi Li, Zeju Thorley, Alexander Duan, Jinming Großbröhmer, Christoph Hoopes, Andrew Reinertsen, Ingerid Xiao, Yiming Landman, Bennett Huo, Yuankai Murphy, Keelin Lessmann, Nikolas van Ginneken, Bram Dalca, Adrian V. Heinrich, Mattias P. Institute of Medical Informatics Universität zu Lübeck Ratzeburger Allee 160 Lübeck23562 Germany Fraunhofer MEVIS Institute for Digital Medicine Lübeck23562 Germany Department of Radiology and Nuclear Medicine Radboud University Medical Center GA Nijmegen6525 Netherlands The Institute of Medical Informatics Universität zu Lübeck Lübeck23562 Germany The Department of Computer Science and Engineering The Hong Kong University of Science and Technology Hong Kong The Fraunhofer MEVIS Institute for Digital Medicine Lübeck23562 Germany The Department of Radiology Stanford University StanfordCA94305 United States The Department of Urology Stanford University StanfordCA94305 United States The Université Paris-Saclay CentraleSupélec Mathématiques et Informatique pour la Complexité et les Systèmes Inria Saclay Gif-sur-Yvette 91190 France Université Paris-Saclay Institut Gustave Roussy Inserm Radiothérapie Moléculaire et Innovation Thérapeutique Villejuif94800 France The Université Paris-Saclay CentraleSupélec Mathématiques et Informatique pour la Complexité et les Systèmes Inria Saclay Gif-sur-Yvette91190 France The Department of Radiology and Nuclear Medicine Radboud University Medical Center Nijmegen6525 GA Netherlands The School of Automation Nanjing University of Information Science and Technology Nanjing210044 China The School of Biomedical Engineering and Imaging Sciences King’s College London London United Kingdom The Athinoula A. Martinos Center for Biomedical Imaging Massachusetts General Hospital United States Harvard Medical School Boston United States The King’s College London United Kingdom The Tel Aviv University The Britton Chance Center for Biomedical Photonics Wuhan National Laboratory for Optoelectronics-Huazhong University of Science and Technology Hubei Wuhan430074 China MoE Key Laboratory for Biomedical Photonics Collaborative Innovation Center for Biomedical Engineering School of Engineering Sciences Huazhong University of Sci

Image registration is a fundamental medical image analysis task, and a wide variety of approaches have been proposed. However, only a few studies have comprehensively compared medical image registration approaches on a wide range of clinically relevant tasks. This limits the development of registration methods, the adoption of research advances into practice, and a fair benchmark across competing approaches. The Learn2Reg challenge addresses these limitations by providing a multi-task medical image registration data set for comprehensive characterisation of deformable registration algorithms. A continuous evaluation will be possible at https://***. Learn2Reg covers a wide range of anatomies (brain, abdomen, and thorax), modalities (ultrasound, CT, MR), availability of annotations, as well as intra- and inter-patient registration evaluation. We established an easily accessible framework for training and validation of 3D registration methods, which enabled the compilation of results of over 65 individual method submissions from more than 20 unique teams. We used a complementary set of metrics, including robustness, accuracy, plausibility, and runtime, enabling unique insight into the current state-of-the-art of medical image registration. This paper describes datasets, tasks, evaluation methods and results of the challenge, as well as results of further analysis of transferability to new datasets, the importance of label supervision, and resulting bias. While no single approach worked best across all tasks, many methodological aspects could be identified that push the performance of medical image registration to new state-of-the-art performance. Furthermore, we demystified the common belief that conventional registration methods have to be much slower than deep-learning-based methods. © 2021, CC BY.

关键词： Image registration

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Development of an Instant Relay Communication System via Quadcopter (Drone)

Development of an Instant Relay Communication System via Qua...

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International Conference on Information, Communication and engineering (ICICE)

作者： I-Huai Lu Jen-Yuan Hsueh Yun-Yeh Lin Hsiang-Chen Hsu Department of Industrial Management I-Shou University Taiwan Department of mechanical automation engineering I-Shou University Kaohsiung City Taiwan Department of Electrical engineering I-Shou University Kaohsiung City Taiwan Department of Mechanical and Computer-Aided Engineering St. John's University New Taipei City Taiwan

Like airborne early warning and control (AEW&C) system, the aim of this research is to design a relay (repeater) communication system on a drone, such as quadcopter (multi-axis aircraft) at certain altitudes to detect ground targets such as vehicles, battle-men at long ranges. The equipped quadcopter plays the relay (repeater) role for two ground vehicles between tall physical obstacles to communicate each other. In addition, remote monitoring and control systems on a flying quadcopter are demonstrated in this paper. The developed relay communication system is able to transmit high quality image through Wi-Fi associated equipment in the manipulator platform with Arduino controller and UART (Universal Asynchronous Receiver Transmitter). An execute instruction via UART in Arduino is issued to control the moving range of the vehicle and to transmit/receive data in broadcast station. Test of relay communication system via quadcopter consists of returning power (dBm), signal strength and image reaction time. Real time monitoring for a leveled flying quadcopter and a ranged of ground vehicle can be precisely achieved by an operator at the remote end.

关键词： Relays Communication systems Time factors Land vehicles Meters Power measurement Time measurement

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Tool path transformation of tilted plane machining features for five-axis numerical control programming

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Journal of the Chinese Society of Mechanical Engineers, Transactions of the Chinese Institute of Engineers, Series C/Chung-Kuo Chi Hsueh Kung Ch'eng Hsuebo Pao 2014年第6期35卷 493-498页

作者： She, Chen-Hua Zheng, Zhi-Hao Jywe, Wen-Yuh Department of Mechanical and Computer-Aided Engineering National Formosa University Huwei Yunlin632 Taiwan Graduate Institute of Innovation Engineering and Precision Technology National Formosa University Huwei Yunlin632 Taiwan Department of Automation Engineering National Formosa University Huwei Yunlin632 Taiwan

Manufacturers in industries such as aerospace and the mold making are tasked with machining complex products with free-form surfaces requiring a high degree of precision. Five-axis machine tools, featuring two rotary axes, are most commonly selected for machining these kinds of products. Owing to increased global competition and rapidly changing market demands, determining the means to generate a five-axis numerical control (NC) program has become an issue of critical importance. Typical five-axis machined parts often include machining features such as holes and grooves on the tilted plane. These features are generally cut with five-axis positioning or 3+2 axis machining. In 3+2 axis machining, a 3-axis NC program is executed with the cutting tool locked in a tilted position using the two rotary axes of the machine. Although many advanced CAD/CAM systems provide functions with which to create tool paths for 3+2 axis machining, the price of these features far exceeds that of 3-axis machining. This work presents a methodology for defining a series of tilted planes to enable the easy transformation of a 3-axis tool to any tilted plane. The study developed a window-based transformation system written in Borland C++ Builder in which five-axis NC programs can be generated according to the definition of the tilted plane and the postprocessor developed in this study. Solid cutting simulation software, VERICUT®, is utilized to confirm the accuracy of the five-axis NC data. © 2014, Chinese Mechanical engineering Society. All right reserved.

关键词： computer aided design

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Characteristics of TiO2 metal-semiconductor-metal photodetectors with O2 plasma treatment

Characteristics of TiO2 metal-semiconductor-metal photodetec...

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International Conference on Information Science, Electronics and Electrical engineering (ISEEE)

作者： L. W. Ji I. T. Tang S. J. Young T. H. Meen J. K. Tsai T. C. Wu S. J. Chang Y. P. Luo K. C. Lee J. C. Lin B. Y. Lee Institute of Electro-Optical and Materials Science National Formosa University Taiwan Department of Greenergy National University of Tainan Tainan Taiwan Department of Electronic Engineering National Formosa University Taiwan Department of Electrical Engineering National Cheng Kung University Tainan Taiwan Department of Automation Engineering National Formosa University Taiwan Department of Mechanical Design Engineering National Formosa University Taiwan Department of Mechanical and Computer-Aided Engineering National Formosa University Taiwan

In this study, titanium dioxide (TiO 2 ) films were prepared on Corning glass substrates by radio frequency (RF) magnetron sputtering and treated without and with O 2 plasma conditions, and then were used to fabricate metal-semiconductor-metal (MSM) ultraviolet (UV) photodetectors (PDs). The effects of the changes on TiO 2 films were investigated by using field-emission scanning electron microscope (FE-SEM), photoluminescence (PL) system and four-point probe measurement. With a 360-nm illumination and 5 V applied bias, it was found that the responsivities of the fabricated TiO 2 PDs without and with 2 minutes O 2 plasma treatment were 36 and 153 A/W, respectively.

关键词： Plasmas Surface treatment Films Educational institutions Charge carrier processes Surface morphology Plasma measurements

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Measuring path without tool center point function for B-type five-axis machine tool

Measuring path without tool center point function for B-type...

引用

2nd International Conference on engineering and Technology Innovation 2012, ICETI 2012

作者： She, Chen-Hua Jywe, Wen-Yuh Huang, Jheng-Jie Department of Mechanical and Computer Aided Engineering National Formosa University Taiwan Department of Automation Engineering National Formosa University 64 Wen-Hua Road Huwei Yunlin 632 Taiwan

ISBN: (纸本)9783037856123

Five-axis machine tools with three linear axes and two rotary axes can produce complex products with free-form surfaces requiring a high degree of precision. However, motion errors of each axis and its assembly error are accumulated in the positioning error of the cutting tool relative to a workpiece. There are many devices reported in the literature on the identification of kinematic errors based on the measurement of the motion error. According to the measurement paths in the ISO draft, ISO/CD 10791-6, the kinematic tests can be applicable to different configurations of five-axis machine tools. However, the advanced controller with tool center point (TCP) function is required while performing kinematic tests. This paper proposed the methodology of generating measurement path without TCP function for B-type five-axis machine tool. The developed module can transform the measuring path into an NC program used for lower hand controller. Verification using VERICUT? solid cutting simulation software demonstrated the veracity of the generated five-axis NC code. The proposed methodology is applicable in a wide range of five-axis machine tool configurations;however, further testing with actual measuring applications will be required for further verification. © (2013) Trans Tech Publications, Switzerland.

关键词： Kinematics

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Analysis of feature and welding consideration for metal bellows

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Key engineering Materials 2011年 486卷 225-228页

作者： Wen, Hungjiun Lo, Yulin Chang, Kuo-Hwa Wen, Fuh-Liang Department of Industrial and System Engineering Chung Yuan Christian University Chungli Taoyuan County 32023 Taiwan Department of Mechanical and Computer-Aided Engineering Graduate Institute of Automation and Mechatronics St. John's University Tamsui New Taipei City 25135 Taiwan

The design and process of diaphragms for a welded bellow was studied in this paper, which is a flexible component in a piping system or vacuum equipment. Due to a lot of interactive effects on each procedure in the manufacturing for a welded bellow, furthermore the commercial FEM software ANSYS was used to construct a 3-dimension model for the displacement and modal analysis of bellows in which extensions and natural frequencies as well as mode shapes could be observed. The mechanical feature should be considered at the practical applications, i.e., to avoid the occurrence of resonant phenomena corresponding to pump operations and fluid delivery in a piping system. For the purpose of modeling validation, the axial tensile testing machine implemented the extension experiment for welded bellows. According to the results of simulation and experiment, the difference among them could be easily detected for the feature investigation for a design-oriented systemic analysis on the development of welded bellows. © (2011) Trans Tech Publications, Switzerland.

关键词： Tensile testing

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System System configuration and evaluation for optical sled drive using constraint-tuning ultrasonic actuator

System System configuration and evaluation for optical sled ...

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2011 International Conference on Applied Mechanics and Manufacturing Technology, AMMT'11

作者： Lai, Ming-Hung Wen, Fuh-Liang Shen, Yu-Lin Ouyang, Minsun Department of Engineering and System Science National Tsing-Hua University Hsinchu 30043 Taiwan Department of Mechanical and Computer-Aided Engineering Graduate Institute of Automation and Mechatronics St.John's University Tamsui New Taipei City 25135 Taiwan Department of Mechanical Engineering University of New Mexico Albuquerque NM 87131 United States

ISBN: (纸本)9783037852309

Through the estimated method for constraint-tuning modified-mode (CTMM), an innovative thin-disc piezoelectric ultrasonic actuator is used to drive an optical sled in this study. With four screws positioned on the thin-disc actuator at the angle distribution of 0°, 90°, 180°, and 320°, both modified modes of ((1, 2))C and ((1, 1))S in vibration provide an approximate equilibrium force to push an optical sled in bilateral movement. The innovative ultrasonic actuator has the vibrator's compact and thinner structure, a thickness of 3 millimeters, without a gearbox rather than a conventional DC sled motor. Using contact friction to drive an optical sled with quick tracking in bilateral motion, experimental results demonstrate obtaining the desired function by a proposed single-phase, bi-frequency LC resonant driving circuit as well as remaining the original sled controller. The general specification of linear speed achieves 200-300 mm/s at less power dissipation for pushing the CD652A BenQ sled drive with 1.0 N output force and 20%-33% efficiency. © (2011) Trans Tech Publications.

关键词： Tuning

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Spatio-temporal perception nets

Spatio-temporal perception nets

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AFRICON Conference

作者： Martin Pongratz Rosemarie Velik Jana Machajdik Vienna University of Technology Institute of Computer Technology Wien Austria Tecnalia Research and Innovation Department of Biorobotics and Neuro-Engineering Spain Vienna University of Technology Institute of Computer Aided Automation Wien Austria

State of the art approaches to autonomous systems face the challenge of sensor data fusion, abstraction, classification, and prediction of events. The trend is going towards the integration of more and more sensors into automation systems, which will reach a number of sensors comparable to the amount of sensory receptors in the human body in the not too distant future. While today's technical systems cannot cope with such a flood of information to be processed rapidly, these challenges are mastered exceptionally well by the human brain. Based on this observation, in prior work, a biologically inspired model for sensor data processing has been proposed [1]. This socalled neuro-symbolic information processing model is based on a functional model of the human perception system. Here, an extension of this concept to spatial and temporal aspects of perception is presented. The challenges for solving these tasks as well as the strategies to master these challenges based on perception-nets are presented.

关键词： Humans Information processing Brain modeling Conferences Neurons Biological system modeling automation

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Takagi-Sugeno fuzzy model-based controller for a lower limb rehabilitation robot actuated by pneumatic muscle actuators

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ICIC Express Letters, Part B: Applications 2011年第2期2卷 427-433页

作者： Chang, Ming-Kun Chen, Ming-Lun Department of Mechanical and Computer-Aided Engineering St. John's University No. 499 Tamking Rd. Tamsui Taipei 25135 Taiwan Institute of Automation and Mechatronics St. John's University No. 499 Tamking Rd. Tamsui Taipei 25135 Taiwan

Pneumatic artificial muscle (PAM) has highly nonlinear and time-varying behavior due to gas compression and nonlinear elasticity of bladder containers. Hence, it is difficult to achieve excellent tracking performance when using classical control methods. This study proposes a Takagi-Sugeno (T-S) fuzzy model-based control for improving control performance. The proposed approach decomposes the model of a nonlinear system into a set of linear subsystems. Therefore, the controller design of T-S fuzzy model can use simple linear control techniques to provide a systematic framework for the design of a state feedback controller. The stability analysis is carried out using Lyapunov direct method. The powerful LMI Toolbox of MATLAB is employed for solving linear matrix inequalities (LMIs) to obtain the controller gains. Experimental results verified that the proposed controller can achieve excellent tracking performance under different disturbances. © 2011 ISSN 2185-2766.

关键词： Linear matrix inequalities

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