نتایج جستجو برای: function generator

تعداد نتایج: 1249988  

2015
Behzad Ghanavati

A low-voltage low-power analog CMOS exponential function generator is designed in 0.18μm CMOS standard technology. The proposed circuit uses Taylor’s approximation concept and consists of a linear low-voltage transconductance with two linearization techniques and one low-voltage current squarer circuit for performing this approximation method. Simulation results using HSPICE shows 60 dB-linear ...

2003
Boaz Barak Shien Jin Ong Salil P. Vadhan

We give two applications of Nisan–Wigderson-type (“non-cryptographic”) pseudorandom generators in cryptography. Specifically, assuming the existence of an appropriate NW-type generator, we construct: 1. A one-message witness-indistinguishable proof system for every language in NP, based on any trapdoor permutation. This proof system does not assume a shared random string or any setup assumption...

Journal: :IACR Cryptology ePrint Archive 2014
Ivan Damgård Jesper Buus Nielsen

We present a pseudo-random bit generator expanding a uniformly random bitstring r of length k/2, where k is the security parameter, into a pseudo-random bit-string of length 2k − log(k) using one modular exponentiation. In contrast to all previous high expansion-rate pseudo-random bit generators, no hashing is necessary. The security of the generator is proved relative to Paillier’s composite d...

Journal: :J. Comput. Syst. Sci. 1992
László Babai Noam Nisan Mario Szegedy

Let f (xl, .. . xk) be a Boolean function that k parties wish to collaboratively evaluate, where each xi is a bit-string of length n. The ith party knows each input argument except x,; and each party has unlimited computational power. They share a blackboard, viewed by all parties, where they can exchange messages. The objective is to minimize the number of bits written on the board. We prove l...

Journal: :Theor. Comput. Sci. 2013
Yu Yu Xiangxue Li Jian Weng

We revisit the problem of basing pseudorandom generators on regular one-way functions, and present the following constructions: – For any known-regular one-way function (on n-bit inputs) that is known to be ε-hard to invert, we give a neat (and tighter) proof for the folklore construction of pseudorandom generator of seed length Θ(n) by making a single call to the underlying one-way function. –...

2016
Satish Kumar Injeti

This work presents a methodology for optimal parameter tuning of PID controller for frequency regulation in PV-Diesel two area power system. The gains of PV generator and diesel generator are optimized in a coordinated manner by employing biologically inspired optimized algorithms like Bat Algorithm (BA) and Firefly Algorithm (FA). Transfer function model of the diesel generator is interfaced w...

E. Mollarazi H. Abbasi H. Salehi M. Zoghi

In this research, a new technetium-99m generator has been developed with addition of Cerium oxide to alumina column.  The adsorption behaviors of 99Mo in the form of molybdate and 99mTc in the form of pertechnetate on CeO2/Al2O3 was investigated and showed that the adsorption capacity of molybdate on this generator is higher than usual generator using Al2O3. Ceric ions were selected as an addit...

2005
Cosmin Popa

A new CMOS current-mode pseudo-exponential circuit based on the superior-order Taylor series expansion will be presented. The advantage of the circuit with respect to the previous reported similar ones is the smaller value of the limited expansion error obtained by using a superior-order approximation of the exponential function. Because of the circuit modularity and of the small silicon area c...

2003
Chun Hok Ho Kuen Hung Tsoi H. C. Yeung Yuet Ming Lam Kin-Hong Lee Philip Heng Wai Leong Ralf Ludewig Peter Zipf Alberto García Ortiz Manfred Glesner

A module generator is described that allows for the generation of synthesizable VHDL modules which implement arbitrary functions in fixed point precision using the Symmetric Table Addition Method (STAM). This module generator was interfaced to a high level synthesis tool “fly” which automatically generates fully-pipelined circuits from a Perl-like language. The resulting system was applied to t...

Journal: :IEEE transactions on neural networks 1999
Nicolaos B. Karayiannis

This paper presents an axiomatic approach for constructing radial basis function (RBF) neural networks. This approach results in a broad variety of admissible RBF models, including those employing Gaussian RBF's. The form of the RBF's is determined by a generator function. New RBF models can be developed according to the proposed approach by selecting generator functions other than exponential ...

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