scholarly journals Centrality Metrics’ Performance Comparisons on Stock Market Datasets

Symmetry ◽  
2019 ◽  
Vol 11 (7) ◽  
pp. 916 ◽  
Author(s):  
Jie Hua ◽  
Maolin Huang ◽  
Chengshun Huang
Keyword(s):  
Stock Market ◽  
Data Visualisation ◽  
Graph Models ◽  
Weighted Degree ◽  
Centrality Metrics ◽  
Static Pattern ◽  
Definition Of ◽  
Market Capitalisation ◽  
Exact Definition ◽  
Better Than

The stock market is an essential sub-sector in the financial area. Both understanding and evaluating the mountains of collected stock data has become a challenge in relevant fields. Data visualisation techniques can offer a practical and engaging method to show the processed data in a meaningful way, with centrality measurements representing the significant variables in a network, through exploring the aspects of the exact definition of the metric. Here, in this study, we conducted an approach that combines data processing, graph visualisation and social network analysis methods, to develop deeper insights of complex stock data, with the ultimate aim of drawing the correct conclusions with the finalised graph models. We addressed the performance of centrality metrics methods such as betweenness, closeness, eigenvector, PageRank and weighted degree measurements, drawing comparisons between the experiments’ results and the actual top 300 shares in the Australian Stock Market. The outcomes showed consistent results. Although, in our experiments, the results of the top 300 stocks from those five centrality measurements’ rankings did not match the top 300 shares given by the ASX (Australian Securities Exchange) entirely, in which the weighted degree and PageRank metrics performed better than other three measurements such as betweenness, closeness and eigenvector. Potential reasons may include that we did not take into account the factor of stock’s market capitalisation in the methodology. This study only considers the stock price’s changing rates among every two shares and provides a relevant static pattern at this stage. Further research will include looking at cycles and symmetry in the stock market over chosen trading days, and these may assist stakeholder in grasping deep insights of those stocks.

Desportes and the Civil Wars

1956 ◽  
Vol 9 (4) ◽  
pp. 195-201
Author(s):  
Victor E. Graham
Keyword(s):  
Civil Wars ◽  
Historical Phenomenon ◽  
Definition Of ◽  
Exact Definition ◽  
Better Than ◽  
Extreme View

The secular poetry of Philippe Desportes (1546-1606) is most often characterized as précieux. One may wish to distinguish between préciosité as an historical phenomenon and précieux as a recurring literary tendency, and one may quarrel about the exact definition of the term, but when examples are needed none are any better than those chosen from the works of Desportes. This no one would deny, but when the extreme view is taken that Desportes is nothing but an insincere and clever versifier who crassly imitates Italian models and hawks his wares to the highest bidder, then one must protest.

Resolution and measurement in the scanning electron microscope

1987 ◽  
Vol 45 ◽  
pp. 534-537 ◽  
Author(s):  
Michael T. Postek
Keyword(s):  
Electron Microscope ◽  
Scanning Electron Microscope ◽  
Engineering Design ◽  
Resolving Power ◽  
Practical Applications ◽  
Instrument Resolution ◽  
Accurate Definition ◽  
Definition Of ◽  
Scanning Electron ◽  
Better Than

The term ultimate resolution or resolving power is the very best performance that can be obtained from a scanning electron microscope (SEM) given the optimum instrumental conditions and sample. However, as it relates to SEM users, the conventional definitions of this figure are ambiguous. The numbers quoted for the resolution of an instrument are not only theoretically derived, but are also verified through the direct measurement of images on micrographs. However, the samples commonly used for this purpose are specifically optimized for the measurement of instrument resolution and are most often not typical of the sample used in practical applications.SEM RESOLUTION. Some instruments resolve better than others either due to engineering design or other reasons. There is no definitively accurate definition of how to quantify instrument resolution and its measurement in the SEM.

General Schema Theory for Genetic Programming with Subtree-Swapping Crossover: Part II

2003 ◽  
Vol 11 (2) ◽  
pp. 169-206 ◽  
Author(s):  
Riccardo Poli ◽  
Nicholas Freitag McPhee
Keyword(s):  
Genetic Programming ◽  
Schema Theory ◽  
Exact Formulation ◽  
Expected Number ◽  
Size Evolution ◽  
General Schema ◽  
Definition Of ◽  
Effective Fitness ◽  
Selection Of ◽  
Exact Definition

This paper is the second part of a two-part paper which introduces a general schema theory for genetic programming (GP) with subtree-swapping crossover (Part I (Poli and McPhee, 2003)). Like other recent GP schema theory results, the theory gives an exact formulation (rather than a lower bound) for the expected number of instances of a schema at the next generation. The theory is based on a Cartesian node reference system, introduced in Part I, and on the notion of a variable-arity hyperschema, introduced here, which generalises previous definitions of a schema. The theory includes two main theorems describing the propagation of GP schemata: a microscopic and a macroscopic schema theorem. The microscopic version is applicable to crossover operators which replace a subtree in one parent with a subtree from the other parent to produce the offspring. Therefore, this theorem is applicable to Koza's GP crossover with and without uniform selection of the crossover points, as well as one-point crossover, size-fair crossover, strongly-typed GP crossover, context-preserving crossover and many others. The macroscopic version is applicable to crossover operators in which the probability of selecting any two crossover points in the parents depends only on the parents' size and shape. In the paper we provide examples, we show how the theory can be specialised to specific crossover operators and we illustrate how it can be used to derive other general results. These include an exact definition of effective fitness and a size-evolution equation for GP with subtree-swapping crossover.

Approaches to an Exact Definition of Schizo-Affective Psychoses for Research Purposes

1983 ◽  
Vol 16 (2-4) ◽  
pp. 245-253
Author(s):  
Peter Berner ◽  
Christian Simhandl
Keyword(s):  
Affective Psychoses ◽  
Definition Of ◽  
Exact Definition

scholarly journals An orthogonal terrain-following coordinate and its preliminary tests using 2-D idealized advection experiments

2014 ◽  
Vol 7 (4) ◽  
pp. 1767-1778 ◽  
Author(s):  
Y. Li ◽  
B. Wang ◽  
D. Wang ◽  
J. Li ◽  
L. Dong
Keyword(s):  
Rotation Angle ◽  
Computational Grids ◽  
Time Step ◽  
Numerical Errors ◽  
Terrain Following ◽  
Steep Terrain ◽  
Definition Of ◽  
Σ Coordinate ◽  
Basis Vectors ◽  
Better Than

Abstract. We have designed an orthogonal curvilinear terrain-following coordinate (the orthogonal σ coordinate, or the OS coordinate) to reduce the advection errors in the classic σ coordinate. First, we rotate the basis vectors of the z coordinate in a specific way in order to obtain the orthogonal, terrain-following basis vectors of the OS coordinate, and then add a rotation parameter b to each rotation angle to create the smoother vertical levels of the OS coordinate with increasing height. Second, we solve the corresponding definition of each OS coordinate through its basis vectors; and then solve the 3-D coordinate surfaces of the OS coordinate numerically, therefore the computational grids created by the OS coordinate are not exactly orthogonal and its orthogonality is dependent on the accuracy of a numerical method. Third, through choosing a proper b, we can significantly smooth the vertical levels of the OS coordinate over a steep terrain, and, more importantly, we can create the orthogonal, terrain-following computational grids in the vertical through the orthogonal basis vectors of the OS coordinate, which can reduce the advection errors better than the corresponding hybrid σ coordinate. However, the convergence of the grid lines in the OS coordinate over orography restricts the time step and increases the numerical errors. We demonstrate the advantages and the drawbacks of the OS coordinate relative to the hybrid σ coordinate using two sets of 2-D linear advection experiments.

scholarly journals Review and Development Trend of Digital Hydraulic Technology

2020 ◽  
Vol 10 (2) ◽  
pp. 579
Author(s):  
Qiwei Zhang ◽  
Xiangdong Kong ◽  
Bin Yu ◽  
Kaixian Ba ◽  
Zhengguo Jin ◽  
...  
Keyword(s):  
Energy Saving ◽  
Developmental Process ◽  
Development Trend ◽  
Research Status ◽  
Uniform Definition ◽  
Definition Of ◽  
The Development Trend ◽  
Exact Definition

Since the emergence of digital hydraulic technology, it has achieved good results in intelligence, integration, energy saving, etc. After decades of development, and it has also attracted wide attention in the industry. However, for many years, the definition of digital hydraulic technology has differed between researchers, and there is no uniform definition. Such a situation affects the development of it to a certain extent. Therefore, this paper gives the exact definition of digital hydraulic technology based on a large number of researches on it. At the same time, the paper analyzes the research status and developmental process of the such a technology, and we forecast the development trend of it.

scholarly journals Potrošnja egzotičnog voća i povrća na području grada Zadra

2017 ◽  
Vol 5 (1) ◽  
Author(s):  
Antonijo Galić ◽  
Bruno Gauta ◽  
Lidija Halilović ◽  
Ivana Jadreško ◽  
Suzana Kardum
Keyword(s):  
Western Europe ◽  
Fruits And Vegetables ◽  
Demographic Characteristics ◽  
Sweet Potatoes ◽  
Independent Variables ◽  
Definition Of ◽  
Exotic Fruits ◽  
The City ◽  
Exact Definition ◽  
Marketing Approach

Consumers in Croatia only recently got the opportunity to buy exotic fruits and vegetables. Until now offer was limited to the already known species which could be found on the shelves for decades, and this types can generally be cultivated in Croatia (except bananas, pineapples and several types of citrus). The demand for exotic fruits and vegetables and its cultivation in Western Europe is growing, and this trend is coming to Croatia. In the study conducted for the city of Zadar the correlation of the interest in buying exotic fruit/vegetables and familiarity with the product, the exact definition of the product and the most significant characteristics of kiwano/sweet potatoes was explored. Regression analysis results showed that all three independent variables significantly predict purchase of both kiwano and sweet potatoes. Three segments of consumers with respect to their demographic characteristics were identified using cluster analysis. A more detailed analysis of these groups could serve future researchers in order to segment the market and determine the marketing approach to each of the segments.

scholarly journals Do Remittances Enhance Financial Development in Transitional Markets?

2019 ◽  
Vol 22 (4) ◽  
pp. 73-89
Author(s):  
Kunofiwa Tsaurai ◽  
Patience Hlupo
Keyword(s):  
Human Capital ◽  
Stock Market ◽  
Private Sector ◽  
Financial Development ◽  
Positive Influence ◽  
Transitional Economies ◽  
Human Capital Development ◽  
Domestic Credit ◽  
Capital Development ◽  
Market Capitalisation

The paper explored (1) the impact of remittances on financial development and (2) whether the interaction between remittances and human capital development had an influence on financial development in transitional economies using the dynamic GMM approach, with data ranging from 1996 to 2014. Remittances were found to have had a non‑significant positive influence on financial development in transitional economies when stock market turnover, stock market value traded, domestic credit to the private sector by banks, and public bond sector development were used as measures of financial development. When stock market capitalisation, domestic credit to the private sector by financial sector, and private bond sector development were used as measures of financial development, remittances had a non‑significance negative effect on financial development. Using all other measures of financial development except stock market capitalisation (which produced a negative sign), the interaction between remittances and human capital development had an insignificant positive influence on financial development. Transitional economies are therefore urged to avoid over‑relying on remittance inflow and human capital development as sources of financial development.

scholarly journals Financial centers of new industrial countries in the world financial architecture

2021 ◽  
Vol 70 (3) ◽  
pp. 188-199
Author(s):  
M. Savchenko ◽  
L. Tsybrii
Keyword(s):  
Hong Kong ◽  
Exchange Rate ◽  
Stock Market ◽  
Open Economy ◽  
Social Progress ◽  
Financial Architecture ◽  
The World ◽  
Financial Center ◽  
Definition Of ◽  
International Financial Center

The views of scholars concerning the definition of «international financial center», which makes it possible to formulate the definition of international financial center essence are summarized in this paper. The factors influencing the formation of international financial center incluing: stable financial system, stable currency, exchange rate stability, political and social stability in the country, favorable geographical location, developed financial infrastructure, open economy for free movement of capital, etc. are identified. The role of international financial centers in increasing their global competitiveness, achieving higher levels of economic growth, prosperity and social progress is substantiated. The classification of international financial centers is investigated. The place of the Hong Kong Financial Center in the financial architecture of the world is determined. The main parameters of the current state of the Hong Kong Financial Center: the USD / HKD exchange rate, the effective exchange rate index weighted by trade, the Hang Seng index, market capitalization, etc. are diagnosed. SWOT-analysis of the Hong Kong Financia Cente is carried out in order to identify its strengths, weaknesses, opportunities and threats. Based on the results of the problem of its functioning, a set of measures to improve competitiveness is also proposed. Hong Kong has favorable macroeconomic and institutional environment, qualified personnel, and is the fifth most competitive international financial center in the world. However, there is a low degree of international element in the domestic stock market, there is also risk of losing the status of «international financial center», other regional economies that have greater access to international investment opportunities in the stock market, such as Singapore, may be a threat. The financial center should focus on overcoming the effects of the coronavirus, promote the share of foreign investment in the economy, take a set of measures to overcome the country's recession, review legal, regulatory and tax requirements to promote development, improve quality of life and attractiveness, and become Asia's leading currency hub.

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