We describe our participation in the WebCLEF 2007 task, targeted at snippet retrieval from web data. Our system ranks snippets based on a simple similarity-based centrality, inspired by the web page ranking algorithms. We experimented with retrieval units (sentences and paragraphs) and with the similarity functions used for centrality computations (word overlap and cosine similarity). We found ...

We study the coupling of bouncing-ball modes to chaotic modes in two-dimensional billiards with two parallel boundary segments. Analytically, we predict the corresponding decay rates using the fictitious integrable system approach. Agreement with numerically determined rates is found for the stadium and the cosine billiard. We use this result to predict the asymptotic behavior of the counting f...

We describe our participation in the WebCLEF 2007 task, targeted at snippet retrieval from web data. Our system ranks snippets based on a simple similarity-based centrality, inspired by the web page ranking algorithms. We experimented with retrieval units (sentences and paragraphs) and with the similarity functions used for centrality computations (word overlap and cosine similarity). We found ...

The trigonometric function of cos(θ) plays an important role in communication systems, digital signal processing systems, and graphical systems. This paper presents a technique for generating the cosine of an angle that is more computationally efficient than the CORDIC algorithm and its many variants for double-precision floating point calculations. A hardware design implementation of the cosin...

In this paper, a high-accuracy and high-speed 2D 8x8 Discrete Cosine Transform (DCT) design is proposed. By using the parallel architecture, inherited from the design reported by S. Ramachandran et. al., re-designing and enhancing function of all component modules, the proposed design can transform each 8x8 block in 64 cycles and achieve a very high accuracy compared to other designs and standa...

<p>Whale Optimization Algorithm (WOA) is a new meta-heuristic algorithm proposed by Australian scholar Mirjalili Seyedali in 2016 based on the feeding behavior of whales ocean. In response to disadvantages this algorithm, such as low solution accuracy, slow convergence speed and easy fall into local optimum, an improved Whale (IWOA) paper. We introduce chaotic mapping initialization keep ...

In this paper, we define a group of solutions x(t) that are sine and cosine to the upper limit integration in non-elementary integral can be arbitrary. We will also equal amplitude. This is generalized amplitude function. using Abel’s methods, described by Armitage Eberlein. And finally, an exponential function whose exponent product complex number At least three groups functions special cases

The article presents an approach for choosing a mixed measurement topology of difference-rangefinder system based on the criteria minimum modulus gradient range difference function and cosine angle between gradients functions corresponding to two measuring bases, in order increase accuracy determining location radio source.

In the present paper polynomial interpolating scaling function and wavelets are constructed by using the interpolation properties of de la Vallée Poussin kernels with respect to the four kinds of Chebyshev weights. For the decomposition and reconstruction of a given function efficient algorithms based on fast discrete cosine and sine transforms are proposed.