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Nowadays, one of the most challenging design issues of battery-driven real-time embedded systems is how to reduce energy consumption such that the battery life can be prolonged. Based on dynamic voltage scaling technology, many energy-efficient real-time task scheduling algorithms have been proposed, however, relatively little work is done in the presence of task synchronization. In this paper, energy-efficient...
A novel Dynamic Carrier-Storage IGBT (DCS-IGBT) is proposed. With Gate (hereinafter, G) and Control Gate (hereinafter, CG), two independent gates integrated in one trench area, CG can be applied with different bias to modulate the carrier-storage layer dynamically. When the device is on, positive bias on CG can raise the concentration of the carrier storage layer leading an increase of the current...
In this paper, we are interested in the energy-efficient scheduling of real-time tasks which may access lock-free objects in a non-ideal DVS processor. We propose an algorithm, called interference-aware speed assignment (IASA), to assign proper execution speeds to tasks which are scheduled by the earliest deadline first (EDF) scheduling policy. The execution speeds are calculated based on the schedulability...
In this paper, we are interested in the energy-efficient scheduling of real-time tasks on a non-ideal DVS processor. We assume that tasks are periodic, pre-emptive, dynamic priority, and may concurrent access to a set of shared resources. Based on the well-known earliest deadline first (EDF) algorithm and the stack resource policy (SRP), we propose an approach, called blocking-aware two-speed (BATS)...
In this paper, we propose a ceiling-based scheduling algorithm, called conditional abortable task scheduling algorithm (CATSA), to schedule real-time tasks with abortable critical sections in a non-ideal dynamic voltage scaling processor. To minimize the energy consumption, the CATSA uses the lowest possible processor speed for task executions such that all the timing constraints of tasks are satisfied...
In this study, single-phase quasi Z-source AC-AC converter with a series connection of the output terminals is proposed. The proposed system has configuration that the input terminals of two single-phase quasi Z-source AC-AC converters are connected in parallel and their output terminals are connected in series. The proposed system can perform the in-phase and out-of-phase buck-boost voltage modes...
This paper proposes an auto-tuning fuzzy PD controller to control the output voltage of a three-phase Z-source inverter (ZSI). The proposed scheme adjusts the proportional and differential coefficients (Kp and Kd) in real time in order to find the most suitable Kp and Kd for PD controller and to simplify the controller design. The proposed scheme is verified the validity by co-simulation in PSIM and...
This paper proposes a new constant control method of the output voltage of a voltage-fed three phase Z-source inverter (ZSI), in case of the capacitor voltage variations in Z-source network or the heavy changes of load. The modulation index for the reference output voltage of the ZSI can be calculated by the basic definition of the ZSI, the input DC voltage and capacitor voltage in Z-source network...
With the massive deployment of mobile devices and sensor networks, resistance against side-channel attacks in cryptographic systems has become an active research topic in recent years. While various security measures exist in literature, most of them are deterministic in nature, where the same input plaintext always results in the same power trace with a given key. Thus, attackers can still aggregate...
The design and integration of traditional voltage control and stability tools with the Energy Market Management System at the California Independent System Operator (CAISO) is discussed and presented in this paper. The tools are transformed from pure analytical and planning applications into an active participant of the daily and real-time energy market operations to provide valuable assessments of...
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