Search results for "Method"
showing 10 items of 13253 documents
Determinants of current account balances
2011
Generalized wave propagation problems and discrete exterior calculus
2018
We introduce a general class of second-order boundary value problems unifying application areas such as acoustics, electromagnetism, elastodynamics, quantum mechanics, and so on, into a single framework. This also enables us to solve wave propagation problems very efficiently with a single software system. The solution method precisely follows the conservation laws in finite-dimensional systems, whereas the constitutive relations are imposed approximately. We employ discrete exterior calculus for the spatial discretization, use natural crystal structures for three-dimensional meshing, and derive a “discrete Hodge” adapted to harmonic wave. The numerical experiments indicate that the cumulat…
ENSEMBLE METHODS FOR RANKING DATA
2017
The last years have seen a remarkable flowering of works about the use of decision trees for ranking data. As a matter of fact, decision trees are useful and intuitive, but they are very unstable: small perturbations bring big changes. This is the reason why it could be necessary to use more stable procedures, as ensemble methods, in order to find which predictors are able to explain the preference structure. In this work ensemble methods as BAGGING and Random Forest are proposed, from both a theoretical and computational point of view, for deriving classification trees when ranking data are observed. The advantages of these procedures are shown through an example on the SUSHI data set.
Ensemble methods for ranking data with and without position weights
2020
The main goal of this Thesis is to build suitable Ensemble Methods for ranking data with weights assigned to the items’positions, in the cases of rankings with and without ties. The Thesis begins with the definition of a new rank correlation coefficient, able to take into account the importance of items’position. Inspired by the rank correlation coefficient, τ x , proposed by Emond and Mason (2002) for unweighted rankings and the weighted Kemeny distance proposed by García-Lapresta and Pérez-Román (2010), this work proposes τ x w , a new rank correlation coefficient corresponding to the weighted Kemeny distance. The new coefficient is analized analitically and empirically and represents the main…
Enhanced Customer Cooperation : Experiences with cooperative compliance in Finland
2018
This report examines the experiences with a collaborative compliance project – Enhanced Customer Cooperation (ECC) – introduced by the Finnish Tax Administration. The ECC was introduced by the Large Taxpayers’ Unit of the Finnish Tax Administration at the beginning of 2013, and it ran as a pilot until the end of 2015. Since the start of 2016, the ECC has been a part of the permanent operations of the Large Taxpayers’ Unit. Based on the interviews with tax officers, corporations participating in the ECC and tax lawyers and tax consultants, the ECC is bringing about a cultural change in the administrative practices and ways of communicating between tax authorities and taxpayers. In general, t…
Rare beta decays and the spectrum-shape method
2017
This is a thesis consisting of seven publications and an introductory part on theoretical studies on rare single beta decays. Firstly, the theoretical framework is applied to the computation of partial half-lives for few selected cases of rare single beta-decay transitions. This includes the study on a possible ultra-low-Q-value decay branch of 115Cd as well as the highly forbidden beta decays of 48Ca and 50V. The double magic 48Ca is one of the few experimentally verified nuclei that decay via the two-neutrino mode of double beta decay. A theoretical study on the single beta-decay branches was used to inspect the competition between the single and double beta-decay channels. In the case of…
Iodine(I) and Silver(I) Complexes Incorporating 3-Substituted Pyridines
2023
Building upon the first report of a 3-acetaminopyridine-based iodine(I) complex (1b) and its unexpected reactivity toward tBuOMe, several new 3-substituted iodine(I) complexes (2b–5b) have been synthesized. The iodine(I) complexes were synthesized from their analogous silver(I) complexes (2a–5a) via a silver(I) to iodine(I) cation exchange reaction, incorporating functionally related substituents as 3-acetaminopyridine in 1b; 3-acetylpyridine (3-Acpy; 2), 3-aminopyridine (3-NH2py; 3), and 3-dimethylaminopyridine (3-NMe2py; 4), as well as the strongly electron-withdrawing 3-cyanopyridine (3-CNpy; 5), to probe the possible limitations of iodine(I) complex formation. The individual properties …
Innovative sequential batch reactor solutions for wastewater treatment
2019
Sekwencyjne biologiczne reaktory (SBR) są szeroko wykorzystywane do oczyszczania ścieków, które obecnie stają się zanieczyszczone coraz to nowymi i bardziej złożonymi substancjami. Korzystne zatem staje się włączenie różnego rodzaju rozszerzających się konfiguracji oraz modyfikacji operacyjnych, aby efektywniej oczyszczać ścieki. W pracy przedstawiono podstawowy opis procesu SBR oraz jego modyfikacji, które prowadzą do lepszego usuwania powstających zanieczyszczeń. Scharakteryzowano cykliczny system osadów czynnych (CASS), który jest jednym z najpopularniejszych procesów reaktorów sekwencyjnych (SBR) stosowanych do oczyszczania ścieków komunalnych oraz ścieków z różnych branż, w tym rafiner…
Zastosowanie metody TDABC do szacowania kosztów działań informacyjnych pośredników w obrocie nieruchomościami
2016
W niniejszej pracy do szacowania kosztów działań informacyjnych pośredników w obrocie nieruchomościami wykorzystano metodę TDABC. W celu przedstawienia i analizy działań informacyjnych posłużono się algorytmem w postaci schematu blokowego. W algorytmie tym zawarto charakterystykę zmiennych (tzw. nośników działań) oraz opisy działań informacyjnych realizowanych przez pośredników. Poszczególne opisy wzbogacono o zmienne mające bezpośredni wpływ na czas ich realizacji, a także średnie czasy ich wykonania. Czasy realizacji oszacowano na podstawie badań eksperymentalnych i ankietowych. Opracowane ogólne równanie czasowe dla dowolnego przebiegu procesu wynikającego z realizowanych czynności pośre…
Business valuation: classical and advanced methods
2020
The topic chosen by the authors implies a qualitative rather than quantitative research approach. The aim of this paper is having assessed the value of a particular company using classical and advanced approaches to analyse the evaluation results obtained using different approaches and give recommendations to company managers. To achieve the aim, the following objectives were set: explore different views on the interpretation of the company as a subject of evaluation; analyse the major methods of assessing the value of companies; having gathered empirical data, assess the value of the particular company using classical and advanced methods; conduct a sensitivity analysis by considering fact…