1,720,955 research outputs found
High frequency currency and cryptocurrency trading
No full textTato práce se zaměřuje na využití klasických statistických metod, konkrétně AR, MA a ARIMA modelů, aplikovaných na vysokofrekvenční obchodní data. Uvažujeme dvě datové sady: první sada obsahuje cenové nabídky na měnovém páru EUR/USD, druhá sada obsahuje realizované obchody na kryptoměnovém páru BTC/USDT. Frekvence těchto dat je několik hodnot za sekundu. V teoretické části je podrobný popis matematických a statistických podkladů pro správné použití ARIMA mo\-delu a praktických informací ohledně obchodních principů. Praktická část popisuje zpracování dat, zahrnuje analýzu týkající se statistického rozdělení dat a dále uvádí porovnání strategie založené na předpovědi z ARIMA modelu se dvěma základními obchodními strategiemi. Praktická část také obsahuje stručnou rešerši tzv. zpětného testování obchodních strategií.ObhájenoThe main focus of this thesis is on the utilization of classical statistical methods, specifically AR, MA and ARIMA models, with high frequency trading data. We consider two datasets: the first with quotes of the currency pair EUR/USD and the second with trades of the cryptocurrency pair BTC/USDT. The frequency of the data is several values per second in both cases. In the theoretical part of the thesis, there is a detailed description of the mathematical and statistical foundations for the proper use of the ARIMA model and practical information related to trading principles. The practical part introduces the description of data processing, including analysis of the statistical distribution of data, and furthermore, the comparison of a trading strategy based on the forecast from the ARIMA model and two basic trading strategies. The practical part also contains an overview of the so called backtesting of the trading strategies
Going Beyond Counting First Authors in Author Co-citation Analysis
Get PDFThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
Vývoj aplikace pro automatické backtestování obchodních strategií
No full textTato diplomová práce se zaměřuje na vývoj uživatelsky přívětivé aplikace s grafickým prostředím pro stahování dat a backtestování obchodních strategií. Aplikace je navržena tak, aby usnadnila jak začínajícím, tak pokročilým algoritmickým obchodníkům vyhodnocovat jejich obchodní strategie s využitím historických tržních dat. Práce začíná komplexním přehledem existujících open-source backtestovacích frameworků v jazyce Python, přičemž zdůrazňuje jejich silné a slabé stránky. Na základě této analýzy je jeden z frameworků zvolen a použit jako hlavní backtestovací engine vyvíjené aplikace. Následně je představen přehled dostupných bezplatných zdrojů historických tržních dat. Jádro práce se věnuje návrhu a implementaci grafické aplikace, která integruje server FastAPI pro zpracování na backendu a klienta PySide6 pro grafické uživatelské rozhraní. Klíčové funkce zahrnují správu dat, spouštění strategií a vizualizaci výsledků. Práce je zakončena uživatelskou a vývojářskou příručkou, které poskytují praktické instrukce pro používání a rozšiřování aplikace.This thesis focuses on the development of a user-friendly graphical application for data down- load and backtesting of trading strategies. The application is designed to facilitate both novice and experienced traders in evaluating their algorithmic trading strategies using his- torical market data. The work begins with a comprehensive review of existing open-source Python-based backtesting frameworks, highlighting their strengths and limitations. Based on this analysis, one of the frameworks is selected and used as the core backtesting engine for the developed application. Subsequently, a review of the available free historical market data sources is provided. The core of the thesis details the design and implementation of the graphical application, which integrates a FastAPI server for backend processing and a PySide6 client for the graphical user interface. Key features include data management, strat- egy execution, and result visualization. The thesis concludes with user and developer guides, providing practical instructions for utilizing and extending the application
Variations on the Author
Get PDF“Variations on the Author” discusses two of Eduardo Coutinho’s recent films (Um Dia na Vida, from 2010, and Últimas Conversas, posthumously released in 2015) and their contribution to the general question of documentary authorship. The director’s filmography is characterized by a consistent yet self-effacing form of authorial self-inscription: Coutinho often features as an interviewer that rather than express opinions propels discourses; an interviewer that is good at listening. This mode of self-inscription characterizes him as an author who is not expressive but who is nonetheless markedly present on the screen. In Um Dia na Vida, however, Coutinho is completely absent form the image, while Últimas Conversas, on the contrary, includes a confessional prologue that moves the director from the margins to the center of his films. This article examines the ways in which these works stand out in the filmography of a director who offers new insights into the notion of cinematic authorship
Appropriate Similarity Measures for Author Cocitation Analysis
Get PDFWe provide a number of new insights into the methodological discussion about author cocitation analysis. We first argue that the use of the Pearson correlation for measuring the similarity between authors’ cocitation profiles is not very satisfactory. We then discuss what kind of similarity measures may be used as an alternative to the Pearson correlation. We consider three similarity measures in particular. One is the well-known cosine. The other two similarity measures have not been used before in the bibliometric literature. Finally, we show by means of an example that our findings have a high practical relevance.information science;Pearson correlation;cosine;similarity measure;author cocitation analysis
Dispelling the Myths Behind First-author Citation Counts
Get PDFWe conducted a full-scale evaluative citation analysis study of scholars in the XML research field to explore just how different from each other author rankings resulting from different citation counting methods actually are, and to demonstrate the capability of emerging data and tools on the Web in supporting more realistic citation counting methods. Our results contest some common arguments for the continued
use of first-author citation counts in the evaluation of scholars, such as high correlations between author rankings by first-author citation counts and other citation
counting methods, and high costs of using more realistic citation counting methods that are not well-supported by the ISI databases. It is argued that increasingly available digital full text research papers make it possible for citation analysis studies to go beyond what the ISI databases have directly supported and to employ more
sophisticated methods
koamabayili/VECTRON-author-checklist: VECTRON author checklist
No full textWe have done our best to complete the author checklist relating to the use of animals in the hut study. Note that the objective for the hut study was to evaluate the IRS treatment applications for residual efficacy against Anopheles mosquitoes, including the local An. coluzzii mosquito population. Cows were only used to attract mosquitoes into the huts and no tests were carried out directly on the cows. The author checklist is intended for use with studies where experiments are carried out on animals, which is why we have had such difficulty in completing this for the hut study, as many of the questions do not relate to how the cows were used
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