This paper presents a comparison between a fuzzy logic controller and a conventional IP controller used for speed control with a direct stator flux orientation control of a doubly fed induction motor. The effectiveness of the proposed control strategy is evaluated under different operating conditions such as of reference speed and for load torque step changes at nominal parameters and in the pr...

Quality of experience of web services is negatively influenced by system delays. To quantify delay and resulting user satisfaction quality evaluation experiments are used, but they typically disregards users’ tasks and content of the website as a part of the assessment procedure. The goal of this study is to explore impact of a user’s task, information presentation such as per-element load dura...

This paper presents a novel distribution power flow algorithm to estimate losses and analyze unbalanced distribution systems. An unbalanced distribution network is decomposed into clusters. The unbalanced laterals are solved using the backward/forward sweep method in each phase. The clustering of total network makes faster computation. The three phase modeling of all the distribution transforme...

To restore the load voltage, dynamic voltage restorer (DVR), which installed between the supply and a sensitive load, should inject voltage and active power from DVR to the distribution system during voltage sag. Due to the limit of energy storage capacity of DC link, it is necessary the minimize energy injection from DVR. In this paper the techniques of the supply voltage sag compensation in a...

A low-cost parallel QoS Sensitive domain, which supports load balancing network architecture, is developed in the paper. To deal with the scaling problem, a large network, thus, is structured by grouping nodes into parallel domains. Different from traditional approaches, especially hierarchical structure, parallel structure aggregates the topologies of domains in a new way. The corresponding ro...

Adaptive Packet Filters (APFs) are motivated by the proliferation of distributed servers and the lack of Quality-of-Service (QoS) management solutions for them. APFs merge packet-filtering and server load monitoring into a novel load-sensitive packet-filtering abstraction for overload protection and QoS differentiation. They integrate well into network protocol stacks and firewalls, scale to la...

control of three phase inverters has been an important issue in recent years. this paper proposes active disturbance rejection control (adrc) scheme for controlling three phase inverters. the main advantage of adrc that motivated us for using this controller for inverter is that it is model independent.  this controller is used in a double loop structure including an inner current loop and oute...

-The permanent magnet linear synchronous motor (PMLSM) is sensitive to various disturbances such as the load disturbances, parameter perturbations, end effect and so on. To overcome this trouble, a new nonlinear robust controller using the homogeneity-based higher-order sliding mode control technique for the PMLSM is proposed. The detailed systematic controller design procedure is discussed. A ...

Background/introduction Triggered release of drugs from carrier systems in vivo is widely investigated for targeted tumor therapy. During the past several years, an ultrasound-sensitive liposomemicrobubble pendant carrier has been developed: microbubbles, decorated with liposomes that carry e.g., doxorubicin, release the drug in response to ultrasound pulse. However, due to low drug load, those...