278,807 research outputs found
Computability and analysis: the legacy of Alan Turing
We discuss the legacy of Alan Turing and his impact on computability and
analysis.Comment: 49 page
A Survey on Continuous Time Computations
We provide an overview of theories of continuous time computation. These
theories allow us to understand both the hardness of questions related to
continuous time dynamical systems and the computational power of continuous
time analog models. We survey the existing models, summarizing results, and
point to relevant references in the literature
Band stop filter with a synthetic inductor with series resistance and a real operational amplifier
This paper deals with application of simple
synthetic inductor with series resistance (non-ideal gyrator).
Those inductors are seldom used. However, if
we use this inductor in the arm of bridge, the circuit
is able to achieve high performance. In this way we
can get band stop filter with good performance. In the
paper we solve influence of real OPA properties. Theoretical
considerations are verified by means of simulations
(MicroCap) and experiments. Based on theoretical
considerations, simulations and experiments are
finally determined by criteria that must meet real operational
amplifier to make the circuit performed well
Lempel-Ziv Parsing in External Memory
For decades, computing the LZ factorization (or LZ77 parsing) of a string has
been a requisite and computationally intensive step in many diverse
applications, including text indexing and data compression. Many algorithms for
LZ77 parsing have been discovered over the years; however, despite the
increasing need to apply LZ77 to massive data sets, no algorithm to date scales
to inputs that exceed the size of internal memory. In this paper we describe
the first algorithm for computing the LZ77 parsing in external memory. Our
algorithm is fast in practice and will allow the next generation of text
indexes to be realised for massive strings and string collections.Comment: 10 page
Modelling the Dynamics of an Aedes albopictus Population
We present a methodology for modelling population dynamics with formal means
of computer science. This allows unambiguous description of systems and
application of analysis tools such as simulators and model checkers. In
particular, the dynamics of a population of Aedes albopictus (a species of
mosquito) and its modelling with the Stochastic Calculus of Looping Sequences
(Stochastic CLS) are considered. The use of Stochastic CLS to model population
dynamics requires an extension which allows environmental events (such as
changes in the temperature and rainfalls) to be taken into account. A simulator
for the constructed model is developed via translation into the specification
language Maude, and used to compare the dynamics obtained from the model with
real data.Comment: In Proceedings AMCA-POP 2010, arXiv:1008.314
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