نتایج جستجو برای: irregular structure
تعداد نتایج: 1591838 فیلتر نتایج به سال:
Translation from physics: ‘Glass’: a material which is hard and inflexible (like a solid) but is not completely ordered or lattice-like in its microscropic structure (thus, unlike a crystal or simple metals). ‘Spin’: pertaining to the magnetic spins of ions in a material. ‘Spin glass’: a material, effectively solid, which contains some irregular distribution of magnetizable ions. Basic laborato...
Activity monitoring of a person for a long-term would be helpful for controlling lifestyle associated diseases. Such diseases are often linked with the way a person lives. An unhealthy and irregular standard of living influences the risk of such diseases in the later part of one's life. The symptoms and the initial signs of these diseases are common to the people with irregular lifestyle. In th...
The electromagnetic coupling effect on the irregular cavity which is acted by ultra wide band electromagnetic pulse (UWB-EMP) is studied. First, an irregular cavity structure model is established by using electromagnetic numerical calculation software (CST). Second, based on the model, the influences of UWB-EMP on the irregular cavity coupling efficiency are analyzed, when its rise time and pul...
Laboratory seakeeping test under irregular wave load is essential for studying seakeeping performances of marine and offshore structures. One of the key techniques in such a sort of test is how to assure the quality of wave load. By assuring the quality of wave load, we mean that man-made irregular wave series exerting on a test model should have a given power spectrum. From a view of optimal c...
Studies on the structure of the cuticle of Tylenchorhynchus martini swarmers with electron microscopes revealed abnormal disruptive and eruptive morphological changes in most layers. Drastic effects of swarming on cuticular structure were reflected in the partial dissolution of cortical layer and matrix and in the irregular cracking of cortical sublayers in sublateral areas of the body. The occ...
Recovery of magnetic resonance images from irregular sampling sets is investigated from the point of view of moment discretization of the Fredholm equation of the first kind. The limited spatial extent of the object is known a priori and the sampling schemes considered each have mean density lower than that imposed by the Nyquist limit. The recovery formula obtained has the same form as a stand...
The purpose of this paper is to develop methods that can reconstruct a bandlimited discrete-time signal from an irregular set of samples at unknown locations. We define a solution to the problem using first a geometric and then an algebraic point of view. We find the locations of the irregular set of samples by treating the problem as a combinatorial optimization problem. We employ an exhaustiv...
In this paper we propose a new class of irregular low-density parity check (LDPC) codes with linear encoding complexity. We show that these codes offer performances compatible with irregular LDPC codes with randomly generated parity-check matrices. The non-systematic part of the paritycheck matrix has a simple triangular structure, which enables linear encoding, while the systematic part of the...
R-band surface photometry is presented for 171 late-type dwarf and irregular galaxies. For a subsample of 46 galaxies B-band photometry is presented as well. We present surface brightness profiles as well as isophotal and photometric parameters including magnitudes, diameters and central surface brightnesses. Absolute photometry is accurate to 0.1 mag or better for 77% of the sample. For over 8...
We report the ultrastructural findings in a case of a 72-year-old black woman with confluent yellowish papules in the cervical region. She had no comorbidities. Ophthalmological examination, electrocardiogram, and echocardiogram were normal. Hematoxylin-eosin staining of the affected skin showed strong alterations in the mid-dermis with irregular clumps of eosinophilic material and loss of the ...
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