منابع مشابه
Spectral Radius of the Sampling Operator with Continuous Symbol
Abstract. Let φ(θ) ∼ ∑∞ −∞ ake ikθ (where ak is the k-th Fourier coefficient of φ) be a bounded measurable function on the unit circle T. Consider the operator Sφ(m,n) on L2(T) whose matrix with respect to the standard basis { eikθ : k ∈ Z } is given by (ami−nj )i,j∈Z. In this paper, we give upper and lower bound estimation for r(Sφ(m,n)), the spectral radius of Sφ(m,n). Furthermore, we will sh...
متن کاملOn the Symbol of a Pseudo-differential Operator
In [ l ] Hörmander defines the generalized symbol of a pseudodifferential operator P as a sequence of partially defined maps between function spaces. Our purpose here is to comment on the existence of characteristic polynomial type symbols <r(P) and to obtain their composition by introducing a product structure on suitable jet bundles. In particular, this gives the lower order symbol for differ...
متن کاملPerformance Evaluation of Jpeg Image Compression Using Symbol Reduction Technique
Lossy JPEG compression is a widely used compression technique. Normally the JPEG technique uses two process quantization, which is lossy process and entropy encoding, which is considered lossless process. In this paper, a new technique has been proposed by combining the JPEG algorithm and Symbol Reduction Huffman technique for achieving more compression ratio. The symbols reduction technique re...
متن کاملAn importance sampling technique for a symbol-by-symbol TCM decoding/equalization algorithm
An importance sampling simulation technique is used to estimate the bit-error rate (BER) of a symbol-by-symbol trelliscoded modulation (TCM) decoder/equalizer proposed for digital microwave radio applications. To evaluate the performance at a BER smaller than 10 , we investigate a randomized bias technique previously developed by the authors. To properly select the bias vectors, the asymptotic ...
متن کاملApplication of Raman Technique in the Detection of Aflatoxins
Aflatoxin is one of the most important topics of research in food contamination . Aflatoxin, a member of the Mycotoxin family, is a secondary metabolite of molds such as Aspergillus Flavus and Aspergillus Parasiticus . These fungi also pollute the crops during production and storage . In the case of the products’ contamination with spores in the desired temperature and humidity conditions, the ...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: International Journal of Modern Physics A
سال: 2002
ISSN: 0217-751X,1793-656X
DOI: 10.1142/s0217751x02010194