1,721,269 research outputs found
Carteggio tra Giammaria Mazzuchelli e Giovanni Degli Agostini (1739-1754)
No full textSi pubblica, con una cospicua introduzione e commento, il carteggio erudito intercorso tra Giammaria Mazzuchelli e il francescano Giovanni Degli Agostini fra il 1739 e il 1754. Lo scambio epistolare mette in evidenza la prevalente cifra erudita del rapporto che legò due dei maggiori protagonisti della storia letteraria italiana del XVIII secolo
Fast wavelet transform assisted predictors of streaming time series
No full textWe explore the shift variance of the decimated, convolutional Discrete Wavelet Transform, also known as Fast Wavelet Transform. We prove a novel theorem improving the FWT algorithm and implement a new prediction method suitable to the multiresolution analysis of streaming univariate datasets using compactly supported Daubechies Wavelets. An effective real value forecast is obtained synthesizing the one step ahead crystal and performing its inverse DWT, using an integrated group of estimating machines. We call Wa.R.P. (Wavelet transform Reduced Predictor) the new prediction method. A case study, testing a cryptocurrency exchange price series, shows that the proposed system can outperform the benchmark methods in terms of forecasting accuracy achieved. This result is confirmed by further tests performed on other time series. Developed in C++, Standard 2014 conformant, the code implementing the FWT and the novel Shift Variance Theorem is available to research purposes and to build efficient industrial applications
A Rapid Development Process with UML
No full textSince "design-oriented" life-cycles came to their maturity, dramatic changes have been introduced as far as programming tools and computer hardware are concerned. Such changes made it possible to develop applications focusing on refactoring rather than on analysis and design. The underlying hypothesis is that by adopting suitable tools and target languages, refactoring would possibly cost less than the overhead introduced by modern A&D techniques. Recently, extreme programming has been proposed as an alternative to a "design-oriented" life-cycle.In this paper we describe a software application developed using a software life-cycle that basically follows the guidelines suggested by extreme programming. Such an approach requires highly expressive programming languages and powerful CASE tools. UML has been selected as the underlying modeling language throughout the whole process, for it incorporates well-known diagrams for describing a software application from different perspectives. Smalltalk has been selected as target language, as it allows fast prototyping and early delivery. We claim that, for small and medium-sized projects, a life-cycle based on refactoring and supported by suitable languages and tools allows team productivity to be greatly enhanced
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