نتایج جستجو برای: power quality monitoring

تعداد نتایج: 1464430  

Journal: :Epidemiology 2008

2012
Stevan Jovica Marinkovic Emanuel M. Popovici

In recent years there is growing pressure on the medical sector to reduce costs while maintaining or even improving the quality of care. A potential solution to this problem is real time and/or remote patient monitoring by using mobile devices. To achieve this, medical sensors with wireless communication, computational and energy harvesting capabilities are networked on, or in, the human body f...

2010
Abdolaziz Ashrafian Mehrdad Rostami

In this paper, a method based on continuous wavelet transform is suggested for calculation of flicker power. The flicker power can be utilized to identify the flicker direction to a flicker source with respect to a monitoring point. In our proposed method, using continuous Gaussian wavelet transform, pure flicker waveforms are extracted from the measured voltage and current signals. The flicker...

2009
Ami Preis Andrew Whittle Avi Ostfeld

1. Abstract Near real-time continuous monitoring systems have been proposed as a promising approach for helping drinking water utilities detect and respond quickly to threats related to the normal operation of the water network. Water quality sensors may detect contamination events that pose a growing threat to public health, while pressure and flow sensors are used for estimating the hydraulic...

Journal: :iranian journal of medical physics 0
t. gorjiara m.sc. in medical physics, medical physics dept., tarbiat modarres university, tehran, iran. m. mokhtari-dizaji associate professor, medical physics dept., tarbiat modarres university, tehran, iran. h. ghanaati associate professor, radiology dept., tehran medical sciences university, tehran, iran.

introduction:  laser  interstitial  thermotherapy  (litt)  is  an  internal  ablation  therapy  method  consisting of a percutaneous or intraoperative insertion of laser fibers directly into the liver tumor with  maximum diameter of 5 cm. in this treatment method, there isn’t any general information about the  relationship  between  increasing  the  exposure  power,  coagulation  and  carboniza...

Journal: :journal of operation and automation in power engineering 2014
k. mazlumi m. mohammad gholiha1 r. abbasi f. mazlumi

in this paper, a new method based on branch placement for the optimal positioning of phasor measurement units (pmus) in power systems is proposed. in this method, the pmus are in type of single-channel and are installed at the beginning of the branches. therefore, they are able to measure the bus voltages. also, the installation of the pmus on the branches increases the security of observabilit...

2001
Reginald Comfort Manuel Gonzalez Arshad Mansoor Phil Barker Tom Short Ashok Sundaram

With the advent of deregulation, distributed generation will play an increasing role in electric distribution systems. Various new types of Distributed Generation (DG), such as micro-turbines and fuel cells, are now being developed in addition to the more traditional solar and wind power. A common belief among developers is that DR will improve power quality, and this potential for better quali...

A. Ghassemi E. zarezadeh S. Saeed Fazel

AC railway traction loads are usually huge single phase loads. As a result, a significant amount of Negative Sequence Current (NSC) is injected into utility grid. Moreover, harmonics and consumption ofreactive power are further power quality problems that the supply network is encountering. In this paper, acompensation strategy with the aid of Railway Power Conditioner (RPC) is proposed to over...

2001
I. Rikalo

This paper describes recent implementations and proposes new developments related to automated fault and disturbance analysis. An advanced expert system for automated analysis of faults and related operations of protective relays using DFR data is described first. Further improvements in the fault location using synchronized sampling are discussed next. Possibility for DFR modifications to allo...

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