Handwritten signatures are one of the most commonly used biometrics. Because signatures are widely accepted, their verification is a fundamental problem. The aim of signature verification is to decide about the origin...
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Handwritten signatures are one of the most commonly used biometrics. Because signatures are widely accepted, their verification is a fundamental problem. The aim of signature verification is to decide about the origin of the signature so the ability to detect forgeries. Until offline signature verification is based on the scanned image of the signatures, online signature verification applies different electronic devices to capture the signatures. Online signatures also contain dynamic information such as the pressure or inclination angle of the pen, so it is much more challenging to forge online signatures than offline ones. In addition, it is possible to define and calculate further derived features based on the captured ones. The captured features are usually function features, which means they assign a value to each signature point or specified sets of signature points. This work aims to compare the usability of common derived function features using a dynamic time warping (DTW) based solution.
Active rectifiers are commonly used converters in interfacing AC and DC grids due to their bidirectional power flow capabilities. Nowadays the development workflow of power converters includes real-time simulation ste...
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ISBN:
(数字)9781665487214
ISBN:
(纸本)9781665487221
Active rectifiers are commonly used converters in interfacing AC and DC grids due to their bidirectional power flow capabilities. Nowadays the development workflow of power converters includes real-time simulation steps to validate control concepts with hardware implementation in a safe environment. The paper presents the development process of a real-time HIL simulation framework for rapid-prototyping of advanced control algorithms of an Active-Front-End (AFE) rectifier. The control concepts and the main circuit models are realized in Matlab/Simulink and fitted for code-generation.
Automated cell nucleus segmentation and classification are required to assist pathologists in their decision making. The Colon Nuclei Identification and Counting Challenge 2022 (CoNIC Challenge 2022) supports the deve...
The article proposes an approach to complete-type and related Lyapunov-Krasovskii functionals that neither requires knowledge of the delay-Lyapunov matrix function nor does it involve linear matrix inequalities. The a...
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The present paper investigates interoperability challenges in multivendor digital substations, focusing on vertical data exchange reliability and Precision Time Protocol synchronization amidst various implementations ...
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ISBN:
(数字)9798350351088
ISBN:
(纸本)9798350351095
The present paper investigates interoperability challenges in multivendor digital substations, focusing on vertical data exchange reliability and Precision Time Protocol synchronization amidst various implementations of the IEC 61850 standard. The state of the art is examined through an Interoperability Testing Framework that assesses communication issues and data exchange across different equipment. Utilizing a two-phase bottom-up and top-down approach within this framework yields an efficient system deployment, focusing on synchronization, data exchange reliability, and addressing variations in IEC 61850 implementations, alongside a systematic literature survey. Results indicate that the proposed top-down engineering process can mitigate interoperability issues, promising streamlined future deployments.
The integration of technology in education has provided a more interactive and engaging experience through the creation of Serious Games. By using 3D virtual environments and Virtual Reality, interactive experiences w...
The integration of technology in education has provided a more interactive and engaging experience through the creation of Serious Games. By using 3D virtual environments and Virtual Reality, interactive experiences which simulate real-life situations and environments can be created. The development process of such applications often proves to be slow and cumbersome. However, the addition of a trigger system or scenario editor could enable educators to easily create scenarios for students without requiring much programming knowledge. Designing the trigger system should be based on the principles of reusability, applicability and extensibility. This paper focuses on the creation of such a trigger system and its uses throughout the development of a 3D VR Serious game called Visit UPT. This game enables students to explore the university campus and simulate small scientific experiments.
We study discrete-time angular-droop control in power inverter networks and leverage second-order information for the tuning. We thereby increase the rate of convergence of the closed-loop angle trajectories towards a...
We study discrete-time angular-droop control in power inverter networks and leverage second-order information for the tuning. We thereby increase the rate of convergence of the closed-loop angle trajectories towards an induced steady state angle. In particular, we select the input penalty matrix, representing a tuning knob to be a sufficiently small diagonal matrix so that the closed-loop system approximately yields Newton’s method. In this way, we ensure quadratic convergence, a feat that is otherwise not achievable with a constant, sufficiently large diagonal input penalty matrix. This draws a link between second-order methods known for their quadratic rate of convergence and the tuning of inverse optimal stabilizing controllers for discrete-time integrator dynamics.
Dissolution testing is part of the target product quality that is essential in approving new products in the pharmaceutical industry. The prediction of the dissolution profile based on spectroscopic data is an alterna...
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Smart Grids (SG) are potential replacements for older power grids, capable of adapting and distributing energy based on demand. The recent technological advances and the increased dependence on electrical energy are a...
Smart Grids (SG) are potential replacements for older power grids, capable of adapting and distributing energy based on demand. The recent technological advances and the increased dependence on electrical energy are all factors in the increased need for reliable and efficient energy systems. The complexity of the smart grid arises from using various components and the high requirements for real-time reliable two-way communication. Accordingly, this represents additional security and privacy challenges. In this paper, we proposed a security and efficient certificateless signcryption scheme with flexible verifiability properties using equality test techniques for Advanced Metering Infrastructure (AMI) within the SG; abbreviated CL-SG. The proposed scheme provides privacy-preserving, confidentiality, data integrity, verifiability, and reduces the level of trust in the third party (e.g., central unit, substation, data concentrator, etc.). The performance evaluation regarding security and complexity analysis shows that the proposed scheme is secure and efficient with good functionality to be fully adopted and implemented within SG. Also, an extended future work is presented to add more flexibility and security properties and features to the current proposed model.
We are currently witnessing a gradual increase in interest in digital shadow and digital twin solutions in the field of industrial automation. These solutions require advanced approaches in the process of their creati...
We are currently witnessing a gradual increase in interest in digital shadow and digital twin solutions in the field of industrial automation. These solutions require advanced approaches in the process of their creation and are gradually becoming an integral part of industrial automation. This paper focuses on the creation of a digital shadow of a physical robotic cell and progressively goes through all the phases from the analysis of communication problems through the design of possible solutions to the actual implementation of one of the proposed solutions. The connection between the virtual robotic cell and the industrial camera is based on the processing of the data sent by the camera located above the physical robotic cell. This data is processed by a program in the PLC and then transferred to the virtual environment of the digital shadow by communication between the two OPC servers. This paper provides a more detailed overview of one possible technique for connecting the virtual environment with the physical robotic cell.
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