نتایج جستجو برای: phase shift

تعداد نتایج: 718932  

2012
M Siepmann J Bzyl S Fokong F Kiessling G Schmitz

Molecular ultrasound imaging is based on the detection of contrast agents (microbubbles) targeted to disease specific receptors in the vasculature. By quantifying the amount of the adherent microbubbles a change in the expression of these receptors and thus the disease development can be assessed. Quantification of microbubbles from ultrasound images in vivo was thus far mainly performed by ana...

2014
William Marshall Paul Marriott

We consider the problem of change-point estimation of the instantaneous phase of an observed time series. Such change points, or phase shifts, can be markers of information transfer in complex systems; their analysis occurring in geology, biology and physics, but most notably in neuroscience. We develop two non-parametric approaches to this problem: the cumulative summation (CUSUM) and phase de...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه کاشان - دانشکده علوم 1384

افزایش غلظت اکسیژن x، در ماده yba2cu3o6+x ، (1< x < 0) موجب یک گذار از فاز تتراگونال به ارتورومبیک میگردد. که در اثر این گذار فاز ماکروساختارهای دوقلویی در فاز ارتورمبیک شکل میگیرند. وجود دوقلوها باعث به وجود آمدن تغییراتی در الگوی پراش میگردد. اما نکته دیگری که حائز اهمیت است بروز رشد یک پیک مرکزی است که تئوری نشان میدهد همراه با گذار فاز و در اثر پدیده دوقلویی بوجود می آید. نکته قابل توجه در ...

Journal: :international journal of communications and information technology 2011
a. r. sharifi pur shirazi m. kazemian m. jabbari

in this paper first we try to analysis the behavior ofthe soas in the optical networks and then have proposed anumerical simple model to simulate the behavior of thesemiconductor optical amplifiers. after that by employing thismodel as inline amplifier for a dwdm optical system, we havesimulated the transmission of 10 channels with bit rate 10 gb/sup to distance 3970 km with rz-dpsk modulation ...

Journal: :Journal of Circuits, Systems, and Computers 2010
Takaaki Hirai Tetsuya Asai Yoshihito Amemiya

A CMOS phase-shift oscillator that uses a phase shift in the conduction of heat is proposed. The oscillator consists of an inverting ampli ̄er and a feedback thermal ̄lter that are integrated on a silicon chip. The thermal ̄lter consists of a polysilicon heater and a MOSFET thermosensor separated from each other by a SiO2 heat-conducting layer. 1 An input signal for the ̄lter travels from the heate...

Journal: :Microelectronics Reliability 2015
Taichun Qin Shengkui Zeng Jianbin Guo

Article history: Received 25 May 2015 Received in revised form 21 June 2015 Accepted 29 June 2015 Available online xxxx

2007
B. Jafarpour M. R. Meybodi

يا هچروم يدنب هشوخ متيروگلا ياراد پ ا ار يددعتم ياهرتم هلمج زا ،نتشادرب هب طوبرم ياهرتماراپ نتشاذگ اه هداد ديد عاعش ، يم هك دشاب ريثات و دنراد متيروگلا ييارگمه و دركلمع رد يدايز اطخ و شيامزآ تروص هب لاومعم نييعت يم رگ د دن . شور هلاقم نيا رد ي رب ينتبم CLA-PSO 1 ي هتسسگ لدم كي هك PSO دشاب يم يارب قيبطت كيتاموتا پ ياهرتمارا يا هچروم يدنب هشوخ يم داهنشيپ ددرگ . روظنم هب گلا ساسا رب هك د...

Journal: :Remote Sensing 2018
Xiaoping Pang Jian Pu Xi Zhao Qing Ji Meng Qu Zian Cheng

In recent years, much attention has been paid to the behavior of passive microwave sea ice concentration (SIC) products for marginal ice zones. Based on the definition of ice edges from ship observations, we identified pseudo-ship observations (PSO) and generated PSO ice edges from twelve cloud-free moderate-resolution imaging spectroradiometer (MODIS) images. Two SIC products of the advanced m...

2012
Michal Pluhacek Roman Senkerik Donald Davendra Ivan Zelinka

The main aim of this paper is the utilization of discrete chaotic Lozi map based chaos number generator to enhance the performance of PSO algorithm. This paper presents the results of research, in whichchaos enhanced PSO algorithm is used to design an optimal PID controller for DC motor system. Obtained results are compared with other non-heuristic and heuristic methods.

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