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A Dissipativity Approach to Safety Verification for Interconnected Systems

We propose a computational method for verifying a state-space safety constraint of a network of interconnected dynamical systems satisfying a dissipativity property. We construct an invariant set as the sublevel set of a Lyapunov function comprised of local storage functions for each subsystem. This approach requires only knowledge of a local dissipativity property for each subsystem and […]

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Photonic integrated transceiver for data readout systems

This study presents a photonic integrated transceiver for application in a data readout unit of a sensornetwork. The device was realized in a generic InP-based technology. The circuit uses an asymmetric coupler and a PIN photodiode for input signal detection and a Mach-Zehnder amplitude modulator for encoding of output sensor data. Small-signal modulation bandwidth of […]

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RAISE: A Whole Process Modeling Method for Unstructured Data Management

Nowadays, unstructured data, e.g., texts, images, and videos, is growing in an explosive speed with the development of Internet and social network. Due to the variety of unstructured data, it is strongly desirable to design a generalized model to represent all kinds of unstructured data and build a system to organize them effectively. In this paper, […]

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Coding Local and Global Binary Visual Features Extracted From Video Sequences

Binary local features represent an effective alternative to real-valued descriptors, leading to comparable results for many visual analysis tasks while being characterized by significantly lower computational complexity and memory requirements. When dealing with large collections, a more compact representation based on global features is often preferred, which can be obtained from local features by means […]

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Mobile Ticket Dispenser System With Waiting Time Prediction

A ticket dispenser (TD) is used to assist customers with the waiting process in, e.g., a restaurant. This paper deploys a mobile TD system (MTDS) with waiting time prediction to enhance the user experience while waiting. For example, the MTDS for a restaurant allows a customer to remotely draw a ticket for a meal order […]

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A Systematic Power-Quality Assessment and Harmonic Filter Design Methodology for Variable-Frequency Drive Application in Marine Vessels

In maritime industry, high fuel costs encourage use of variable-frequency drives (VFDs) for energy-saving applications. However, introduction of such nonlinear loads in the vessel’s power distributionnetwork induces harmonics, which can lead to potential risks if are not predicted and controlled. In this paper, a systematic power-quality assessment and monitoring methodology is proposed to calculate VFD contribution […]

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Directly PAM-4 Modulated 1530-nm VCSEL Enabling 56 Gb/s/ גּ Data-Center Interconnects

We demonstrate a 56 Gb/s four-level pulse-amplitude modulation (PAM-4) transmission using direct detection and a long-wavelength 18-GHz bandwidth vertical-cavity surface-emitting laser as directly modulated light source for short-reach inter- and intra-connects in datacenters and short-reachnetworks. Error-free transmission over 2 km at 7% hard-decision forward-error correction threshold is achieved by applying powerful equalization schemes at the […]

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An Improved Phase Correlation Method Based on 2-D Plane Fitting and the Maximum Kernel Density Estimator

In this letter, an improved phase correlation (PC) method based on 2-D plane fitting and the maximum kernel density estimator (MKDE) is proposed, which combines the idea of Stone’s method and robust estimator MKDE. The proposed PC method first utilizes a vector filter to minimize the noise errors of the phase angle matrix and then […]

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A novel 3D thermal impedance model for high power modules considering multi-layer thermal coupling and different heating/cooling conditions

Thermal management of power electronic devices is essential for reliable performance especially at high power levels. One of the most important activities in the thermal management and reliability improvement is acquiring the temperature information in critical points of the power module. However accurate temperature estimation either vertically or horizontally inside the power devices is still […]

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Frequency support by distributed demand side management of building cooling systems

The increasing generation of electric power from renewable energy resources is jeopardizing supply safety and security of the electricity network. Therefore the implementation of new control and management strategies is required to achieve their integration and maintain a permanent balance between power generation and demand. This paper investigates the possibility for electrical loads connected to the […]

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