نتایج جستجو برای: phase pattern p0001
تعداد نتایج: 927272 فیلتر نتایج به سال:
. The ~easurement of the differential propagation phase and copolar correlation coefficient are affected by the d1fferent1al phase pattern of the antenna system when operating in an alternate horizontal and vertical transmitting scheme. Direct phase pattern measurements of a large dish such as that of the CSU CHILL is difficult because of the need to obtain phase reference. A simple technique i...
مطالعات بسیاری به کاربرد اندازه گیری مقاومت الکتریکی در تشخیص بازه فحلی، آبستنی و زمان زایمان در گاو اشاره کرده اند و کمترین میزان ver را معادل با زمان استروس دانسته اند. در این مطالعه به بررسی تغییر مقادیر مقاومت الکتریکی واژن در طول چرخه فحلی و همچنین دوره ی پس از تلقیح در گاو شیری نژاد هلشتاین پرداخته شد. اندازه گیری مقاومت الکتریکی واژن بصورت دو بار در روز به همراه اندازه گیری روزانه میزان ...
The rhyolitic flows and sills in the extremity of Ghal'eh-chay river (East of Ajabshir, East Azerbaidjan) are exposed in the Lalun sandstone deposits. Compositionally, these rocks are rhyolite and are composed of euhedral quartz phenocrystals and subhedral perthitic orthoclases in a glassy to fine grained matrix containing quartz, k-feldspar and minor sodic plagioclases. There are not any ferro...
antenna structures with low side lobe levels are normally the main goal during antenna design. in this paper, a new method for reduction of radiation pattern side lobe level in phased array antenna with uniform and non-uniform weighting is presented. in this method, by changing the array elements weight or adding several elements, such as slc technique, the pattern with low side lobe level can ...
the purpose of this study was to examine the english language needs of medical students at tehran university of medical sciences . analysis of the needs took place for three groups: 320 undergraduate students, 30 postgraduate students and 20 university instructors. a triangulation approach to collect data was used in which a combination of the quantitative (using the questionnaires) and qualita...
In this paper we present an algorithm for optical phase evaluation based on the wavelet transform technique. The main advantage of this method is that it requires only one fringe pattern. This algorithm is based on the use of a sًecond /2 phase shifted fringe pattern where it is calculated via the Hilbert transform. To test its validity, the algorithm was used to demodulate a simulated fringe p...
Focusing properties of the radially polarized Bessel–Gauss beam with a sine-azimuthal variation wavefront was investigated by the vector diffraction theory. The wavefront distribution is the sine function of the azimuthal angle with one phase parameter that indicates the phase change frequency. Results show that the focal pattern can be altered by the phase parameter, and many novel focal patte...
Systemic sclerosis is a generalized disorder of connective tissue, in which the pattern of disease extent, progression and outcome is heterogenous. To determine clinical features, disease extent and progression, we studied our patients in two phases of disease early (the first 3 years) and late phases (after 6 years of disease). 19 patients had diffuse cutaneous and 34 patients had limited cuta...
In this paper, formulation of Modified Ginsberg – Landau theory of second grade phase transitions has been expressed. Using this theory, termodynamic properties, such as heat capacity, energy, entropy and order parameters ofandnuclei has been investigated. In the heat capacity curve, calculated according to tempreture, a smooth peak is observed which is assumed to be a signature of transition f...
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