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Tytuł:
The Family and Modern trends: How to Construct an optimal Model of roles Played in the Family
Autorzy:
Ecler-Nocoń, Beata
Powiązania:
https://bibliotekanauki.pl/articles/2005003.pdf
Data publikacji:
2016-06-30
Wydawca:
Wydawnictwo Adam Marszałek
Tematy:
sex
family
gender
optimal model
Opis:
The modern family faces a variety of ever-changing circumstances which greatly inhibit the selection of clearly defined roles or behaviours that might bring about the good of the whole family. The article describes three models which regulate the roles adopted by individuals within the family. The text defines the optimal method of role creation and selection as one which allows for the simultaneous consideration of not only the variety of possibilities, but also the needs of all family members.
Źródło:
The New Educational Review; 2016, 44; 96-106
1732-6729
Pojawia się w:
The New Educational Review
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
On population dynamics with campaign on contraception as control strategy
Autorzy:
Ekhosuehi, V. U.
Chete, F. O.
Powiązania:
https://bibliotekanauki.pl/articles/2052396.pdf
Data publikacji:
2018
Wydawca:
Politechnika Rzeszowska im. Ignacego Łukasiewicza. Oficyna Wydawnicza
Tematy:
contraception
logistic model
Malthusian model
optimal control model
population
antykoncepcja
model logistyczny
model maltuzjański
model sterowania
populacja
Opis:
This work considers a population divided into two groups according to the adoption of contraception. The campaign in favour of contraception is modelled as a bounded optimal control problem within the framework of the logistic and the Malthusian models of population dynamics. The control is the fraction of non-adopters successfully educated on contraception. The objective is to maximise the number of non-adopters successfully educated on contraception over time. The optimisation problem is solved using the Pontryagin's maximum principle and the parameters of the model are estimated using the method of least squares.
Źródło:
Journal of Mathematics and Applications; 2018, 41; 63-79
1733-6775
2300-9926
Pojawia się w:
Journal of Mathematics and Applications
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Identyfikacja spektrum relaksacji metodą momentów: własności i zastosowania
Identification of the relaxation spectrum by moment method approach: theoretical properties and application
Autorzy:
Stankiewicz, A.
Powiązania:
https://bibliotekanauki.pl/articles/291723.pdf
Data publikacji:
2009
Wydawca:
Polskie Towarzystwo Inżynierii Rolniczej
Tematy:
lepkosprężystość
spektrum relaksacji
identyfikacja
optymalne wygładzenie modelu
burak cukrowy
viscoelasticity
relaxation spectrum
identification algorithm
optimal model smoothing
beet sugar root
Opis:
W pracy [Stankiewicz 2009] przedstawiono metodę wyznaczania spektrum relaksacji na podstawie dyskretnych, zakłóconych pomiarów modułu relaksacji zgromadzonych w standardowym teście relaksacji naprężeń, w której model spektrum dobierany jest tak, aby zapewnić najlepsze jego wygładzenie przy równoczesnym odtworzeniu pomiarów modułu relaksacji. W tej pracy zbadano własności teoretyczne metody, w szczególności przeanalizowano wpływ zakłóceń na wyznaczony model spektrum i pokazano, że jego wygładzenie zależy zarówno od planu eksperymentu jak i od wyznaczonych pomiarów modułu relaksacji. Zaproponowano modyfikację algorytmu dla przypadku, gdy wartość ustalona modułu relaksacji jest niezerowa oraz wyprowadzono prostą formułę rekurencyjną. Podano także przykład jej zastosowania do wyznaczenia spektrum relaksacji próbki buraka cukrowego.
The paper deals with the problem of recovery of continuous relaxation spectrum from discrete-time noise corrupted measurements of relaxation modulus obtained in stress relaxation test. A new robust identification algorithm is discussed in which the best smoothing of the model is achieved together with simultaneous interpolation of the relaxation modulus measurements. It is proved that the smoothing of the resulting relaxation spectrum model depends both on the proper selection of the measurement points as well as on the experiment results. It is also proved that the accuracy of the spectrum approximation depends linearly on measurement noises. A useful modification of the scheme is proposed for the case when the equilibrium stress modulus is non-zero and simple recursive formula is derived. The method is general enough to cover both viscoelastic solids and liquids. The effectiveness of the method is demonstrated through the computation of the relaxation spectrum of the beet sugar root sample in the state of the uniaxial strain.
Źródło:
Inżynieria Rolnicza; 2009, R. 13, nr 6, 6; 259-267
1429-7264
Pojawia się w:
Inżynieria Rolnicza
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Constraint summation in phonological theory
Autorzy:
Magri, Giorgio
Storme, Benjamin
Powiązania:
https://bibliotekanauki.pl/articles/1818892.pdf
Data publikacji:
2020
Wydawca:
Polska Akademia Nauk. Instytut Podstaw Informatyki PAN
Tematy:
constraint-based phonology
optimality theory
harmonic grammar
dispersion theory
paradigm uniformity
optimal paradigms model
Opis:
The classical constraints used in phonological theory apply to a single candidate at a time. Yet, some proposals in the phonological literature have enriched the classical constraint toolkit with constraints that instead apply to multiple candidates simultaneously. For instance, Dispersion Theory (Flemming 2002, 2004, 2008) adopts distinctiveness constraints that penalize pairs of surface forms which are not sufficiently dispersed. Also, some approaches to paradigm uniformity effects (Kenstowicz 1997; McCarthy 2005) adopt Optimal Paradigm faithfulness constraints that penalize pairs of stems in a paradigm which are not sufficiently similar. As a consequence, these approaches need to “lift” the classical constraints from a single candidate to multiple candidates by summing constraint violations across multiple candidates. Is this assumption of constraint summation typologically innocuous? Or do the classical constraints make different typological predictions when they are summed, independently of the presence of distinctiveness or optimal paradigm faithfulness constraints? The answer depends on the underlying model of constraint optimization, namely on how the profiles of constraint violations are ordered to determine the smallest one. Extending an independent result by Prince (2015), this paper characterizes those orderings for which the assumption of constraint summation is typologically innocuous. As a corollary, the typological innocuousness of constraint summation is established within both Optimality Theory and Harmonic Grammar.
Źródło:
Journal of Language Modelling; 2020, 8, 2; 251--294
2299-856X
2299-8470
Pojawia się w:
Journal of Language Modelling
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Constraint summation in phonological theory
Autorzy:
Magri, Giorgio
Storme, Benjamin
Powiązania:
https://bibliotekanauki.pl/articles/1818888.pdf
Data publikacji:
2020
Wydawca:
Polska Akademia Nauk. Instytut Podstaw Informatyki PAN
Tematy:
constraint-based phonology
optimality theory
harmonic grammar
dispersion theory
paradigm uniformity
optimal paradigms model
Opis:
The classical constraints used in phonological theory apply to a single candidate at a time. Yet, some proposals in the phonological literature have enriched the classical constraint toolkit with constraints that instead apply to multiple candidates simultaneously. For instance, Dispersion Theory (Flemming 2002, 2004, 2008) adopts distinctiveness constraints that penalize pairs of surface forms which are not sufficiently dispersed. Also, some approaches to paradigm uniformity effects (Kenstowicz 1997; McCarthy 2005) adopt Optimal Paradigm faithfulness constraints that penalize pairs of stems in a paradigm which are not sufficiently similar. As a consequence, these approaches need to “lift” the classical constraints from a single candidate to multiple candidates by summing constraint violations across multiple candidates. Is this assumption of constraint summation typologically innocuous? Or do the classical constraints make different typological predictions when they are summed, independently of the presence of distinctiveness or optimal paradigm faithfulness constraints? The answer depends on the underlying model of constraint optimization, namely on how the profiles of constraint violations are ordered to determine the smallest one. Extending an independent result by Prince (2015), this paper characterizes those orderings for which the assumption of constraint summation is typologically innocuous. As a corollary, the typological innocuousness of constraint summation is established within both Optimality Theory and Harmonic Grammar.
Źródło:
Journal of Language Modelling; 2020, 8, 2; 251--294
2299-856X
2299-8470
Pojawia się w:
Journal of Language Modelling
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Application of a mathematical model in control of sport training
Autorzy:
Ryguła, I.
Cholewa, J.
Powiązania:
https://bibliotekanauki.pl/articles/333678.pdf
Data publikacji:
2004
Wydawca:
Uniwersytet Śląski. Wydział Informatyki i Nauki o Materiałach. Instytut Informatyki. Zakład Systemów Komputerowych
Tematy:
optymalne obciążenia treningowe
model matematyczny
optimal training loads
mathematical model
Opis:
The value of each state variable (physical condition, sport scores) at the end of certain period is a function of general state of the athlete, his scores described at the beginning of this period of time and adapted training, that is implemented intensity of separate training means (controlling variables) in the analyzed time period. The aim of this work was to determine optimal values of control in swimmer training, targeted at achieving the best score in 25 m and 800 m swimming. For this purpose a model was developed, beginning with its shape (it has been defined, what is state variable and what is control, how the state variables and control variables influence the increase) to determining numerical values of all parameters. The basis for the development of the detailed model was pedagogic experiment conducted on the group of 14-year old boys. Conclusions were drawn on the practical possibility of using a mathematical model in control of sport training.
Źródło:
Journal of Medical Informatics & Technologies; 2004, 7; KB105-113
1642-6037
Pojawia się w:
Journal of Medical Informatics & Technologies
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Edukacja studenta minimalnego: praktyczna aplikacja trychotomicznego modelu maksymalno-optymalno-minimalnego
Autorzy:
Bogusławska-Tafelska, Marta
Powiązania:
https://bibliotekanauki.pl/articles/444250.pdf
Data publikacji:
2007
Wydawca:
Uniwersytet Warmińsko-Mazurski w Olsztynie
Tematy:
the trichotomous maximal-optimal-minimal model of the language leamer
the minimal student
the optimal student
the communicative dyad of the academic teacher
and the student
the communicative triad of the academic teacher
the student and the
educational institution
Opis:
The paper explores some aspects of the minimal student education. What attracts one's attention are: the dyad encompassing the academic teacher and the minimal student; and the triad encompassing the academic teacher, the minimal student and the educational institution. The hypothesis orchestrating this study, preliminary as it is, contains the assumption that the minimal learner profile disturbs both relations, bringing about the violation of the educational process. As a result, the methodological verification of the teaching procedures, as well as the psycholinguistic awareness raising process, have to be introduced if the minimal student education is to be continued.
Źródło:
Acta Neophilologica; 2007, IX; 81-96
1509-1619
Pojawia się w:
Acta Neophilologica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Analysis of Foreign Currency Portfolio in Indonesia
Autorzy:
Ningsih, Evi Sulfiah
Adam, Pasrun
Subiyanto, Subiyanto
Supian, Sudrajat
Powiązania:
https://bibliotekanauki.pl/articles/1165228.pdf
Data publikacji:
2018
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
Foreign Exchange
Markowitz Model
Optimal Portfolio
Return
Risk
Opis:
The study entitled Analysis of Foreign Currency Portfolio In Indonesia is a case study of a foreign exchange market portfolio taking a research site at Bank Indonesia. Markowitz was the first to introduce the concept of portfolio risk, which in general risk can be reduced by combining multiple assets into a portfolio or so-called diversification. This research was conducted to analyze the optimal portfolio of foreign exchange investment in order to make investments give maximum return and certain risk that is obtained optimally. Based on the results of the research of the four currencies used as sample analysis, the four currencies can form as optimal portfolio of CHF, CNY, GBP and JYP, while the highest rate of return using portfolio theory is in Chinese Yuan (CNY) by 71%. The expected return of the currency is dominating compared to other foreign currencies.
Źródło:
World Scientific News; 2018, 107; 72-83
2392-2192
Pojawia się w:
World Scientific News
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The field of sequential Monte Carlo methods
Autorzy:
Brzozowska–Rup, Katarzyna
Dawodowicz, Antoni Leon
Powiązania:
https://bibliotekanauki.pl/articles/748652.pdf
Data publikacji:
2009
Wydawca:
Polskie Towarzystwo Matematyczne
Tematy:
model przestrzeni stanów, ukryte procesy Markowa, filtracja optymalna, sekwencyjne metody Monte Carlo, sekwencyjna funkcja ważności, „re-próbkowanie”
state-space models, hiddenMarkov model, optimal filtering, sequential Monte Carlo, sequential importance sampling, resampling.
Opis:
Celem pracy jest zaprezentowanie idei metod filtracji opartych na sekwencyjnej metodzie Monte Carlo, w literaturze nazywanych również metodami filtru cząsteczkowego oraz odniesienia do odpowiedniej literatury. Istotę omawianych algorytmów przedstawiamy rozważając problem estymacji silnie nieliniowych i niegaussowskich modeli przestrzeni stanów. W praktyce bowiem w takich przypadkach dobrze znany i najczęściej wykorzystywany algorytm rozszerzonego filtru Kalmana (ang. Extended Kalman Filter, EKF) może wykazywać istotną nieefektywność. Idea filtru cząsteczkowego polega na estymacji rozkładu prawdopodobieństwa rozkładem empirycznym wyznaczonym na podstawie cząsteczek, tzw. „chmury punktów”. Zaimplementowanie algorytmu filtru cząsteczkowego wymaga zasadniczo przeprowadzenia trzech procedur: (1) losowania cząsteczek z odpowiednio dobranej sekwencyjnej funkcji ważności, (2) określenia istotności cząsteczek, (3) powtórnego losowania, tzw. resampling. Metody te są coraz bardziej popularnew dziedzinie ekonomii, statystyki, medycynie i teorii sygnałów.
This paper provides an introduction to the field of sequential Monte Carlo methods which are also known as particle filters methods. The best known algorithm to solve the problem of non-linear non-Gaussian filtering is the Extended Kalman Filter (EKF) but in settings where the dynamics are significantly non-linear or the noise intensities are high, the EKF can perform quite poorly. Particle filtering methods are powerful tools for online estimation and tracking in nonlinear and non-Gaussian dynamical systems. The basic idea is to approximate the transition probability density function by a discrete cloud of points, called particles. They commonly consistof three steps:(1) drawing samples in the state-space of the system,(2) computing proper importance weights of each sample and(3) resampling.These methods are becoming increasingly popular in economics and finance so the objective of this paper is to explain the basic assumptions of the methodology and provide references to relevant literature.
Źródło:
Mathematica Applicanda; 2009, 37, 51/10
1730-2668
2299-4009
Pojawia się w:
Mathematica Applicanda
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Optimal Dietary Allocation to Reduce the Risk of Overweight and Obesity
Autorzy:
Amuji, H. O.
Onukwube, O. G.
Igboanusi, C.
Odumodu, C. U.
Chukwu, U.
Powiązania:
https://bibliotekanauki.pl/articles/1193474.pdf
Data publikacji:
2021
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
Health implications
Obesity
Optimal dietary allocation
Overweight
Transportation model
Opis:
In this paper, we developed a transportation model for dietary allocation to reduce the risk of overweight and obesity. Our interest was on macronutrients such as carbohydrate, fat and oil and protein diets. These diets are the chief supplier of calories used by the body to perform its metabolic activities. The maximum cost method was used to determine the optimal calories per week from the intake of high fat diet and we found that the calorie required is 478.8 Kcal and average daily required intake is 68.4 Kcal. Again, the least cost method was used to determine the optimal calories per week from the intake of low carbohydrate diet and we found that the calorie required is 681.7 Kcal and average daily required intake is 97.4 Kcal. Comparing the calories from both diets, we conclude that consumption of diet with high fat produce less calories, and hence should reduce the risk of overweight and obesity compared to the consumption of carbohydrate diet even in low quantity. Since calorie is calorie irrespective of its source, we recommend taking high fat diet than taking low carbohydrate diet to reduce the risk of overweight and obesity. The determined daily calories are the minimum calories required by the body to maintain its metabolic activities, more of it will lead to excess and accumulation in the body which will lead to overweight and obesity.
Źródło:
World Scientific News; 2021, 158; 130-144
2392-2192
Pojawia się w:
World Scientific News
Dostawca treści:
Biblioteka Nauki
Artykuł
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