نتایج جستجو برای: phase measurement
تعداد نتایج: 1013944 فیلتر نتایج به سال:
Measurement-induced phase transitions arise due to a competition between the scrambling of quantum information in many-body system and local measurements. In this work we investigate these different classes fast scramblers, systems that scramble as quickly is conjectured be possible---on timescale proportional logarithm size. particular, consider sets deterministic sparse couplings naturally in...
- Power system state estimation is a central component in energy management systems of power system. The goal of state estimation is to determine the system status and power flow of transmission lines. This paper presents an advanced state estimation algorithm based on weighted least square (WLS) criteria by introducing virtual meters. For each bus of network, except slack bus, a virtual meter...
the new phase-ii n-glucoside metabolites of butobarbitone and pentobarbitone are identified and quantified in human urine after single doses of these drugs. the identification and quantification of these metabolites were carried out by mass spectroscopy technique (accurate mass measurement and high voltage scanning). it was found that the butobarbitone n-glucoside comprised 26% of the dose with...
The capability to accurately quantify the size of software developed with a Model-Driven Development (MDD) method is critical to software project managers for evaluating risks, developing project estimates, and having early project indicators. This paper presents a measurement procedure defined according to the last version of the ISO 19761 standard measurement method. The measurement procedure...
This paper describes unambiguous state discrimination (USD) for a sequence of coherent states with fluctuating phase, while considering eavesdropping against differential-phase-shift quantum key distribution systems. A measurement system extracts a fraction of the incoming signal of coherent states, estimates the carrier phase from that fraction, and then conducts a USD measurement on the main ...
Power system state estimation is a process to find the bus voltage magnitudes and phase angles at every bus based on a given measurement set. The state estimation convergency is related to the sufficiency of the measurement set. Observability analysis actually tests this kind of problem and guarantees the state estimation accuracy. A new and useful algorithm is proposed and applied in this pape...
We explicitly construct a large class of unitary transformations that allow to perform the ideal estimation of the phase-shift on a single-mode radiation field. The ideal phase distribution is obtained by heterodyne detection on two radiation modes after the interaction. The quantum estimation of an unknown phase shift—the so called quantum phase measurement—is the essential problem of high sen...
In the past years, a number of algorithms have been introduced for synthesis aperture radar (SAR) imaging. However, they all suffer from the same problem: The data size to process is considerably large. In recent years, compressive sensing and sparse representation of the signal in SAR has gained a significant research interest. This method offers the advantage of reducing the sampling rate, bu...
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