检索结果-内蒙古大学图书馆

Automated Vehicle Validation Conference (IAVVC), IEEE International

作者： Jun Yan Pengyu Wang Danni Wang Weiquan Huang Daniel Watzenig Huilin Yin College of Electronics and Information Engineering Tongji University Shanghai China Institute of Electrical Measurement and Sensor Systems Graz University of Technology and with the Virtual Vehicle Research Graz Austria

ISBN: (数字)9798350354072

ISBN: (纸本)9798350354089

Semantic segmentation is a significant perception task in autonomous driving. It suffers from the risks of adversarial examples. In the past few years, deep learning has gradually transitioned from convolutional neural network (CNN) models with a relatively small number of parameters to foundation models with a huge number of parameters. The segment-anything model (SAM) is a generalized image segmentation framework that is capable of handling various types of images and is able to recognize and segment arbitrary objects in an image without the need to train on a specific object. It is a unified model that can handle diverse downstream tasks, including semantic segmentation, object detection, and tracking. In the task of semantic segmentation for autonomous driving, it is significant to study the zero-shot adversarial robustness of SAM. Therefore, we deliver a systematic empirical study on the robustness of SAM without additional training. Based on the experimental results, the zero-shot adversarial robustness of the SAM under the black-box corruptions and white-box adversarial attacks is acceptable, even without the need for additional training. The finding of this study is insightful in that the gigantic model parameters and huge amounts of training data lead to the phenomenon of emergence, which builds a guarantee of adversarial robustness. SAM is a vision foundation model that can be regarded as an early prototype of an artificial general intelligence (AGI) pipeline. In such a pipeline, a unified model can handle diverse tasks. Therefore, this research not only inspects the impact of vision foundation models on safe autonomous driving but also provides a perspective on developing trustworthy AGI. The code is available at: https://***/momo1986/robust_sam_iv.

关键词： Training Systematics Semantic segmentation Artificial general intelligence Pipelines Training data Prototypes Robustness Convolutional neural networks Autonomous vehicles

来源：评论

学校读者我要写书评

暂无评论

Modular Wireless Inertial Motion Capture System with Self-Calibration

Modular Wireless Inertial Motion Capture System with Self-Ca...

引用

IEEE sensorS

作者： Niklas Schäfer Bastian Latsch Julian Seiler Lukas Hugo Hammen Lars Stein Felix Herbst Philipp Beckerle Mario Kupnik Measurement and Sensor Technology Group Technische Universität Darmstadt Germany Chair of Autonomous Systems and Mechatronics Friedrich-Alexander-Universität Erlangen-Nürnberg Germany

ISBN: (数字)9798350363517

ISBN: (纸本)9798350363524

Wearable inertial motion capture systems enable movement analysis outside the laboratory, thereby promising valuable data collection in natural environments. We present an open-source motion capture system consisting of a variable number of wireless IMU sensor modules and a modular software framework providing OpenSim compatibility. System calibration is achieved by automatic sensor-to-segment alignment (S2SA) using a weighted least squares approach, enabling self-calibration based on arbitrary movements and ongoing recalibration. The S2SA approach is evaluated in a simulation and a proof-of-concept walking experiment with a human participant. Both in the simulation and in the experiment, all initializations converge, demonstrating the robustness of the automatic S2SA approach. Position and orientation deviations are below 0.09 m and 1.28 0 , respectively. Lower limb joint angles exhibit root mean square errors ranging from 2.1 0 to 7.20 compared to a state-of-the-art S2SA method, while Pearson correlation coefficients are larger than 0.91 for all joints. Altogether, the results demonstrate the potential of self-calibration based on arbitrary movements, thereby enhancing the motion capture system's usability and paving the way towards clinical applicability.

关键词： Wireless communication Performance evaluation Wireless sensor networks Robot sensing systems Motion capture Software Robustness Calibration Usability Root mean square

来源：评论

学校读者我要写书评

暂无评论

A New Method to Determine the Shear Wave Speed and Attenuation Coefficient in Phantoms for Ultrasound Shear Wave Elastography

A New Method to Determine the Shear Wave Speed and Attenuati...

引用

IEEE Instrumentation and measurement technology Conference

作者： Zuyuan Wang Christian Kargel School of Mechanical and Electrical Engineering University of Electronic Science and Technology of China Sichuan Chengdu China Division of Sensor Technology and Measurement Systems Institute for Measurement and Automation Bundeswehr University Munich Neubiberg Germany

Ultrasound shear wave elastography is an effective imaging method for diagnosing abnormal tissues. It can provide spatially resolved tissue information like the shear wave speed $c$ s and the attenuation coefficient a, which depend on the (health) condition of the examined tissue. In this study we investigate a new method to determine c s and $a$ by using a homogenous tissue-mimicking agar phantom and taking into account the inevitable reflection at the phantom-air boundary. The experimental data are fitted in the least-squares sense to a model that is theoretically derived and accounts for a single reflected wave. The obtained $c$ s and $a$ are then used to calculate in a rheological model-independent fashion the shear storage modulus G’ and the shear loss modulus G“, which are often used in material testing, and together fully describe the behavior of a viscoelastic material. The G’ and G“ results are compared with those obtained using a standard rotational rheometer.

关键词：

来源：评论

学校读者我要写书评

暂无评论

DC measurement in HVAC-systems: Status Quo and Recent Developments

DC Measurement in HVAC-Systems: Status Quo and Recent Develo...

引用

International Universities Power Engineering Conference (UPEC)

作者： Philipp Schachinger Dennis Albert Alexander Fröhlich Herwig Renner Johannes Mandl Philipp Trampitsch Reinhard Klambauer Alexander Bergmann Werner Schöffer Institute of Electrical Power Systems Graz University of Technology Graz Austria Institute of Electrical Measurement and Sensor Systems Graz University of Technology Graz Austria ARTEMES GmbH Eibiswald Austria

The measurement of small direct currents in presence of high AC currents on high voltage potential is a challenging task. Inductive current transducers (CT) are not able to measure DC and other non-conventional CTs are also not designed for DC. Therefore, DC measurements are done in transformer neutral points on ground potential. In this work, the state of the art on DC measurements in the high-voltage transmission grid is given, including the measurement in the transformer neutral point, the indirect measurement with the differential magnetometer method, and the indirect method of measuring a compensating current. In addition an optical current measurement system under development is presented.

关键词：

来源：评论

学校读者我要写书评

暂无评论

A Double Node Thin-Film Thermocouples for In-Situ measurement

A Double Node Thin-Film Thermocouples for In-Situ Measuremen...

引用

2022 International Conference on Automation, Robotics and Computer Engineering, ICARCE 2022

作者： Ma, Rong Zhang, Meiju Zhang, Zhongkai Huang, Manguo Liang, Xiaobo Liu, Jiangjiang Liu, Zhaojun Tian, Bian Xi'An Jiaotong University State Key Laboratory for Mechanical Manufacturing Systems Engineering Xi'an China Aviation Key Laboratory of Science and Technology on Special Condition Monitoring Sensor Technology Beijing Changcheng Aeronautic Measurement and Control Technology Research Institute Beijing China

ISBN: (纸本)9781665475488

The design, fabrication, testing and implementation of a new high-performance tungsten-rhenium thin film thermocouple are introduced. In this paper, tungsten-rhenium TFTCs are taken as the research object, after simulation analysis in COMSOL software and design, it is made by screen-printing technology and magnetron sputtering. This kind of thin film thermocouple primarily utilizes two kinds of electrode materials with varying composition combination, mainly tungsten with 5% rhenium and tungsten with 26% rhenium. Furthermore, high-temperature annealing is performed to maintain the mechanical properties and thus improve thermoelectric performance. The results demonstrate that the performance is reliable in the temperature range of 150-600 C° with a repeatability of 2.02%, providing application value for high-temperature in-situ sensing. © 2022 IEEE.

关键词： Thermocouples

来源：评论

学校读者我要写书评

暂无评论

Heterodyne Standing-Wave Interferometer with Improved Phase Stability

引用

Nanomanufacturing and Metrology 2021年第3期4卷 190-199页

作者： Ingo Ortlepp Jens-Peter Zollner Ivo W.Rangelow Eberhard Manske Institute of Process Measurement and Sensor Technology Technische Universitat IlmenauEhrenbergstraBe 2998693 IlmenauGermany Microelectronic and Nanoelectronic Systems Group Technische Universitat IlmenauIlmenauGermany Nanoscale Systems Group Technische Universitat IlmenauIlmenauGermany

This paper describes a standing-wave interferometer with two laser sources of different wavelengths,diametrically opposed and emitting towards each *** resulting standing wave has an intensity profile which is moving with a constant velocity,and is directly detected inside the laser beam by two thin and transparent photo *** first sensor is at a fixed position,serving as a phase reference for the second one which is moved along the optical axis,resulting in a frequency shift,proportional to the *** phase difference between both sensors is evaluated for the purpose of interferometric length measurements.

关键词： Standing wave Interferometer Heterodyne Ultrathin photo diode

来源：评论

学校读者我要写书评

暂无评论

Optimizing Frequency Selection for Cole-Cole Model Parameter Extraction in Bioimpedance Spectroscopy Using CPE 17

Optimizing Frequency Selection for Cole-Cole Model Parameter...

引用

17th International Workshop on Impedance Spectroscopy, IWIS 2024

作者： Ouni, Cherif Ammar, Nour Kallel, Ahmed Yahia Horstmann, John Derbel, Nabil Fakhfakh, Ahmed Kanoun, Olfa Digital Research Centre of Sfax National School of Electronics and Telecommunications of Sfax Laboratory of Signals Systems Artificial Intelligence and Networks Sfax Tunisia Measurement and Sensor Technology Faculty of Electrical Engineering and Information Technology Chemnitz University of Technology Chemnitz09126 Germany National Engineering School of Sfax University of Sfax Control and Energy Management Laboratory Sfax3038 Tunisia Chemnitz University of Technology Chemnitz09126 Germany Electronic Devices of Micro and Nano Technique Faculty of Electrical Engineering and Information Technology Chemnitz University of Technology Chemnitz09126 Germany

ISBN: (纸本)9798331507626

Wearable bioimpedance spectroscopy (BIS) devices are becoming increasingly popular due to their portability and low power consumption. However, improving power efficiency remains a significant challenge. One proposed solution is to reduce the number of excitation frequencies in the stimulation signal. This study investigates how reducing the number of used frequencies affects bioimpedance spectroscopy performance through simulations using synthetic data derived from a Cole-Cole model incorporating a Constant Phase Element (CPE). Simulations were conducted at various noise levels to evaluate how noise impacts the relationship between frequency and impedance. The results indicate a correlation between the number of frequencies used in BIS and the accuracy of CPE parameter extraction. This is particularly evident for α parameters of 0.8 and higher. Conversely, lowering the α value increases errors, even when a higher number of frequencies is used. © 2024 IEEE.

关键词： Image coding

来源：评论

学校读者我要写书评

暂无评论

Fiber Optic Current sensor Prototype for Low DC measurements in the Power Grid

Fiber Optic Current Sensor Prototype for Low DC Measurements...

引用

IEEE International Workshop on Applied measurements for Power systems (AMPS)

作者： Johannes Mandl Philipp Trampitsch Philipp Schachinger Dennis Albert Reinhard Klambauer Alexander Bergmann Institute of Electrical Measurement and Sensor Systems Graz University of Technology Graz Austria Institute of Electrical Power Systems Graz University of Technology Graz Austria OMICRON electronics GmbH Graz University of Technology Graz Austria

Our society is dependent on a continuous supply of electrical energy. Therefore, it is essential to closely monitor all occurring signals in the transmission grid to assess their effect on the grid's components and security of supply. In particular, the time course and distribution of direct currents such as geomagnetically induced currents is of great interest. In this paper, we report progress on the development of a fiber optic current sensor intended to observe direct currents on all three phases of a high-voltage power grid. The device exploiting the Faraday effect can be described in a theoretical model using Jones formalism. We calculated the sensor scale factor when using twisted single-mode and spun HiBi fiber as the sensing head, giving implications on the applicability of those fibers for a highly sensitive fiber optic current sensor. Laboratory results of the sensor prototype show a linear current relationship for currents below 1 A.

关键词：

来源：评论

学校读者我要写书评

暂无评论

Segment-Anything Models Achieve Zero-shot Robustness in Autonomous Driving

arXiv

引用

arXiv 2024年

作者： Yan, Jun Wang, Pengyu Wang, Danni Huang, Weiquan Watzenig, Daniel Yin, Huilin The College of Electronics and Information Engineering Tongji University Shanghai201804 China The Institute of Electrical Measurement and Sensor Systems Graz University of Technology The Virtual Vehicle Research Graz8010 Austria

关键词： Semantic Segmentation

来源：评论

学校读者我要写书评

暂无评论

Refractive index characterization and modeling of polymerization-dependent refractive index variations in two-photon polymerization resins

Optics Continuum

引用

Optics Continuum 2025年第5期4卷 996-1005页

作者： Golf Feigl Daniel Zaugg Jakob W Hinum-Wagner Samuel M Hörmann Alexer Bergmann Graz University of Technology Institute of Electrical Measurement and Sensor Systems Inffeldgasse 33 8010 Graz Austria Christian Doppler Laboratory for Structured Matter Based Sensing 8010 Graz Austria ams OSRAM Group Tobelbader Strasse 30 8141 Premstaetten Austria

Two-photon polymerization (2PP) is a cutting-edge technique for fabricating precise micro- and nanostructures, with applications in photonics, biomedical engineering, and micro-optics. A critical factor influencing the optical performance of 2PP-fabricated structures is the refractive index (RI) of the printed parts. This study analyzes the refractive indices of three resins developed by UpNano GmbH . Using a Pulfrich refractometer, dispersion curves of the polymerized resins were measured across the visible to near-infrared spectrum (450 nm – 1550 nm), and temperature-dependent RI behavior was characterized for both liquid and polymerized resins (15°C – 50°C). The RI of the polymerized resins ranges from 1.496 to 1.567. What we believe to be a novel model was developed to account for periodic RI fluctuations inherent in 2PP-printed parts due to voxel-based polymerization patterns. The model fits experimental data well and provides additional insights into the degree of polymerization within printed samples. These findings not only enhance understanding of the optical properties of 2PP-fabricated structures but also suggest opportunities for tailoring materials for gradient-index optics and other advanced optical applications.

关键词： Femtosecond lasers Gradient index optics Optical components Optical properties Refractive index Ultrafast lasers

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：