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Wyświetlanie 1-15 z 91
Tytuł:
Totally positive polynomials with small length
Autorzy:
Flammang, Valerie
Sac-Épée, Jean-Marc
Powiązania:
https://bibliotekanauki.pl/articles/1839136.pdf
Data publikacji:
2019
Wydawca:
Polska Akademia Nauk. Instytut Badań Systemowych PAN
Tematy:
auxiliary functions
length of polynomials
Opis:
In this work we provide a list of irreducible monic, totally positive polynomials with integer coefficients and lengths below 2.3679d for a degree d polynomial. Our approach combines techniques based on auxiliary functions and mixed-integer linear programming algorithms. The list obtained shows that there are polynomials of this type up to degree 16, with the exception of degree 11 where we are very close to the threshold.
Źródło:
Control and Cybernetics; 2019, 48, 3; 463-471
0324-8569
Pojawia się w:
Control and Cybernetics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Design of polymer gears for auxiliary power transmission systems of automotive vehicles
Autorzy:
Budzik, G.
Sobolak, M.
Jagiełowicz, P. E.
Powiązania:
https://bibliotekanauki.pl/articles/247538.pdf
Data publikacji:
2010
Wydawca:
Instytut Techniczny Wojsk Lotniczych
Tematy:
polymer gears
auxiliary power transmission systems
Opis:
he polymer gears owing to their advantages are used in auxiliary power transmission systems of automotive . For example, the gears occur in transmissions of drives of car wipers or drives of car windows. The polymers are mainly used owing to lower production cost than in steel gears. The better silent-running and corrosion z are their other advantages in comparison with steel gears. Unfortunately, the polymer gears are not devoid of disadvantages. The main disadvantages are the lower efficiency and the lower capacity and what follows — the bigger dimensions. The conservative attitude of design of polymer gears is still noticeable. As a rule, such gears e steel gears, but the polymer gears are designed with bigger module. The most probably owing costs and lack of proper design recommendations, for design of polymer gears is used geometry of classic steel gears, because the procedure of analytical strength calculations for classic gears is well-know. The gears made from polymers are built in the mould matrices. In constructions of many mechanisms, the gears can be replaced in case of consumption or damage, so the construction of such gears that can be produced in the machine shop equipped with gear generating e for standard gears, was justified. Nowadays, the constructions of mechanisms used in automotive vehicles are often not even dismountable, but the whole mechanism is changed. It is worth changing the attitude to design of such transmissions.  The method of gears production gives many opportunities.   The production of gears with ited geometry, also such geometry that is impossible to obtain using traditional methods of machining, is possible in the mould matrices.
Źródło:
Journal of KONES; 2010, 17, 4; 73-77
1231-4005
2354-0133
Pojawia się w:
Journal of KONES
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Terminative in Egyptian - a process of grammaticalization
Terminativus w języku egipskim - proces gramatykalizacji
Autorzy:
Komorowska, Krystyna
Powiązania:
https://bibliotekanauki.pl/articles/568197.pdf
Data publikacji:
2012
Wydawca:
Uniwersytet Mikołaja Kopernika w Toruniu. Wydawnictwo UMK
Tematy:
grammaticalization
terminative
Egyptian
prefixation
auxiliary verb
Opis:
The form of terminative, in Old and Classical Egyptian known as sDm.t=f, was present in all the stages of Egyptian language until Coptic. The paper analyses changes which occurred in that form due to a process of grammaticalization. These changes were mostly congruent with a well-known pattern: main verb > auxiliary verb > prefix, the pattern, which can be commonly observed in the development of Egyptian language. However, there were also some other mechanisms, which should be considered much more unusual. The paper shows circumstances under which such mechanisms can be observed, in particular: a role of phonetic change in a language and coexisting of words of different lexical category, originating from the same word. Egyptian, being a written language for nearly four thousand years, allows to point such atypical examples and show their origins and consequences over a long period of time.
Forma terminativu, w staroegipskim i klasycznym egipskim znana jako sdm. t=f, występowała we wszystkich etapach języka egipskiego, aż do koptyjskiego. Autorka artykułu analizuje zmiany, które zaszły w tej formie na skutek procesu gramatykalizacji. Zmiany te w znacznym stopniu zgodne były z dobrze znanym schematem: czasownik główny > czasownik posiłkowy > prefiks, schematem, który jest powszechnie obserwowalny w rozwoju języka egipskiego. Jednakże, zachodziły tam także inne, bardziej nietypowe mechanizmy. W artykule ukazano okoliczności, w jakich takie mechanizmy mogą wystąpić, w szczególności: rolę mających miejsce w języku zmian fonetycznych oraz współwystępowanie słów należących do różnych części mowy, ale pochodzących od tego samego słowa. Egipski, który był językiem pisanym przez niemal cztery tysiące lat, pozwala wskazać takie nietypowe przykłady i określić ich pochodzenie oraz późniejszy rozwój w dłuższym okresie.
Źródło:
Linguistica Copernicana; 2012, 1(7); 255-266
2080-1068
2391-7768
Pojawia się w:
Linguistica Copernicana
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The use of the auxiliary verb in 2nd person singular perfect verbal forms in Old Russian documents of the 14–16th centuries
Autorzy:
Waraczewski, Maciej
Powiązania:
https://bibliotekanauki.pl/articles/1022231.pdf
Data publikacji:
2020-10-28
Wydawca:
Uniwersytet im. Adama Mickiewicza w Poznaniu
Tematy:
perfect
auxiliary verb
subject
Old Russian documents
Opis:
The article analyses 2nd person singular perfect forms in a collection of Old Russian documents of the 14–16th centuries. The main focus is placed on their formal aspects and the transition from an analytic to synthetic form. The process itself is well-known, yet it still lacks a detailed description and fully explained reasons for its occurrence. The author, providing statistical data on the use of the auxiliary verb byti and explicitly expressed subject, proves its great regularity. There is a strong dependence between the two items and usually only one of them is applied with perfect constructions. This shows that the function of the auxiliary verb has been completely changed and in the period described it played only the role of a person indicator. Thus, it became redundant when the use of personal pronouns was increased. All the exceptions to this rule are scarce and can be explained with factors of a syntactical or extra-linguistic character. The author’s assumptions are confirmed with statistical data and examples taken from spiritual and contractual charters of grand princes and appanage princes in the XIV–XVI centuries.
Źródło:
Studia Rossica Posnaniensia; 2020, 45, 2; 235-242
0081-6884
Pojawia się w:
Studia Rossica Posnaniensia
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A calibrated synthetic estimator for small area estimation
Autorzy:
Iseh, Matthew Joshua
Enang, Ekaette Inyang
Powiązania:
https://bibliotekanauki.pl/articles/1827531.pdf
Data publikacji:
2021-09-06
Wydawca:
Główny Urząd Statystyczny
Tematy:
auxiliary variable
calibration estimation
simulation
synthetic estimation
Opis:
Synthetic estimators are known to produce estimates of population mean in areas where no sampled data are available, but such estimates are usually highly biased with invalid confidence statements. This paper presents a calibrated synthetic estimator of the population mean which addresses these problematic issues. Two known special cases of this estimator were obtained in the form of combined ratio and combined regression synthetic estimators, using selected tuning parameters under stratified sampling. In result, their biases and variance estimators were derived. The empirical demonstration of the usage involving the proposed calibrated estimators shows that they provide better estimates of the population mean than the existing estimators discussed in this study. In particular, the estimators were examined through simulation under three distributional assumptions, namely the normal, gamma and exponential distributions. The results show that they provide estimates of the mean displaying less relative bias and greater efficiency. Moreover, they prove more consistent than the existing classical synthetic estimator. The further evaluation carried out using the coefficient of variation provides additional confirmation of the calibrated estimator's advantage over the existing ones in relation to small area estimation.
Źródło:
Statistics in Transition new series; 2021, 22, 3; 15-30
1234-7655
Pojawia się w:
Statistics in Transition new series
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
On some efficient classes of estimators using auxiliary attribute
Autorzy:
Bhushan, Shashi
Kumar, Anoop
Powiązania:
https://bibliotekanauki.pl/articles/15017632.pdf
Data publikacji:
2023-03-15
Wydawca:
Główny Urząd Statystyczny
Tematy:
Bias
Mean square error
Efficiency
Auxiliary attribute
Opis:
This paper considers some efficient classes of estimators for the estimation of population mean using known population proportion. The usual mean estimator, classical ratio, and regression estimators suggested by Naik and Gupta (1996) and Abd-Elfattah et al. (2010) estimators are identified as the members of the suggested class of estimators. The expressions of bias and mean square errors are derived up to first-order approximation. The proposed estimators were put to test against various other competing estimators till date. It has been found both theoretically and empirically that the suggested classes of estimators dominate the existing estimators.
Źródło:
Statistics in Transition new series; 2023, 24, 2; 141-157
1234-7655
Pojawia się w:
Statistics in Transition new series
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Modeling and Exploitation Load Tests of the Suspended Route Slings Caused by Passage of the Locomotive at Various Speed along Mining Excavation
Autorzy:
Drozd, Kazimierz
Nieoczym, Aleksander
Powiązania:
https://bibliotekanauki.pl/articles/2022491.pdf
Data publikacji:
2022
Wydawca:
Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:
suspended monorail
dynamic force
mining auxiliary transportation
Opis:
Despite the fact that suspended monorails have been used in the mining industry for over 50 years it is necessary to continue research on the possibilities of increasing the unit mass of the transported load or the speed of people transport. The first step is to establish the exact dynamic load of suspended route’ elements and compare this value with easy to calculation static load. The objective of the research was to determine the influence of speed and direction of travel on maximum load force applied to the sling of the route in mining excavation. The research results indicated that the speed of 2 ms−1 does not significantly influence the load on the sling. Theoretical hypothesis, stating that the estimation of the force value in the sling ought to be performed using projecting on a surface perpendicular to the route was confirmed. It was also proven that in order to characterize the geometry of the sling as well as a precise analysis of its load it is necessary to employ the length and the angle of the chain in relation to the above mentioned surface. Upon employing statistical analysis of the test results, the maximum dynamic effect of the locomotive passing was determined to be 20.1 ± 2.5% of the value of the calculated static load for all slings, projected onto a plane perpendicular to the route. For a single sling, mounted on a test route section inclined at an angle of about 10°, the increase in force due to the passage of the locomotive was up to 21.0% of the static load for this sling.
Źródło:
Advances in Science and Technology. Research Journal; 2022, 16, 1; 266-281
2299-8624
Pojawia się w:
Advances in Science and Technology. Research Journal
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Shall in Present-Day English
Autorzy:
Lubańska, Maja
Powiązania:
https://bibliotekanauki.pl/articles/504722.pdf
Data publikacji:
2012
Wydawca:
Komisja Nauk Filologicznych Polskiej Akademii Nauk, Oddział we Wrocławiu
Tematy:
auxiliary
shall
predicate
Old English
demotic meaning
Opis:
The paper aims at presenting the contemporary usage of the verb shall in Modern English. The traditional principles governing the usage of shall constitute a complex paradigm in which the implications of different forms change according to the person of the subject. The statistics show that the verb shall experienced a dramatic fall in frequency of use between the early 1960s and 1990s. The author is aiming at presenting the evolution of the verb shall throughout the centuries, its reorganization and the way it has altered. The Old English shall expressed obligation/necessity whereas the Middle English usage indicated to the predicative element of the verb in question. Furthermore, the author explores the difference in application between will and shall. The semantic shift of 'shall' appears to be a natural consequence of the competition it lost to will. Moreover, in 'shall' seems to be retracting to the narrow niche of seldom usage. The article also indicates to the use of shall in present-day English both in American and British varieties. In American English, which is commonly assumed to be more advanced and open to change than British English, 'shall' seems to survive in the contexts where it expresses deontic meaning.
Źródło:
Academic Journal of Modern Philology; 2012, 1; 65-74
2299-7164
2353-3218
Pojawia się w:
Academic Journal of Modern Philology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The Class of Estimators of Finite Population Mean Using Incomplete Multi-Auxiliary Information
Autorzy:
Srivastava, Meenakshi
Garg, Neha
Powiązania:
https://bibliotekanauki.pl/articles/466065.pdf
Data publikacji:
2013
Wydawca:
Główny Urząd Statystyczny
Tematy:
bias
mean square error
multi-auxiliary information
Opis:
In this paper, a class of estimators is considered for estimating the mean of the finite population utilizing available incomplete multi-auxiliary information. Some special cases of this class of estimators are considered. The approximate expressions for bias and mean square error of the suggested estimators have also been derived and theoretical results are numerically supported.
Źródło:
Statistics in Transition new series; 2013, 14, 2; 201-216
1234-7655
Pojawia się w:
Statistics in Transition new series
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
To Misreport or not to report? The Case of the Italian Survey on Household Income and Wealth
Autorzy:
Neri, Andrea
Rannalli, M. Giovanna
Powiązania:
https://bibliotekanauki.pl/articles/466032.pdf
Data publikacji:
2011
Wydawca:
Główny Urząd Statystyczny
Tematy:
Unit Nonresponse
Measurement Error
Auxiliary Information
Subsampling
Imputation
Opis:
The objective of the paper is to adjust for the bias due to unit nonresponse and measurement error in survey estimates of total household financial wealth. Sample surveys are a useful source of information on household wealth. Yet, survey estimates are affected by nonsampling errors. In particular, when it comes to household wealth, unit nonresponse and measurement error can severely bias the estimates. Using the Italian Survey on Household Income and Wealth, we exploit the available auxiliary information in order to assess the magnitude of such a bias. We find evidence that for this kind of surveys, nonsampling errors are a major issue to deal with, possibly more serious than sampling errors. Moreover, in the case of SHIW the potential bias due to measurement error seems to outweigh by far that induced by nonresponse.
Źródło:
Statistics in Transition new series; 2011, 12, 2; 281-300
1234-7655
Pojawia się w:
Statistics in Transition new series
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Sylvia Pankhurst and the international auxiliary language
Sylvia Pankhurst i międzynarodowy język pomocniczy
Autorzy:
Aray, Başak
Powiązania:
https://bibliotekanauki.pl/articles/910313.pdf
Data publikacji:
2019-03-28
Wydawca:
Uniwersytet im. Adama Mickiewicza w Poznaniu
Tematy:
Sylvia Pankhurst
international auxiliary language
międzynarodowy język pomocniczy
Opis:
Sylvia Pankhurst was a pioneering figure of socialist feminism who advocated for universal suffrage and against war. Less well-known is her involvement in the movement for an international auxiliary language. In 1927, Pankhurst published a booklet, Delphos. The Future of International Language, where she described the growing need for a world auxiliary language and her support for Interlingua (Latino sine flexione). A biographically informed study of Delphos shows the modernist, cosmopolitan and democratic vocation of the international auxiliary language movement in the early 20th century. Pankhurst’s views on the motivation and principles of an interlanguage-to-come were widely shared by the international auxiliary language community. We present her support for Interlingua as an example of the scientific humanism that dominated the beginnings of interlinguistics, and relate her language activism to her socialist and pacifist stands.
Sylvia Pankhurst była pionierską postacią socjalistycznego feminizmu, który opowiadał się za powszechnym prawem wyborczym i przeciw wojnie. Mniej znane jest jej zaangażowanie w ruch na rzecz międzynarodowego języka pomocniczego. W 1927 roku Pankhurst opublikowała broszurę Delphos. Przyszłość języka międzynarodowego, w którym opisała rosnące zapotrzebowanie na światowy język pomocniczy i jej wsparcie dla języka Interlingua (Latino sine flexione). Osadzone w kontekście biograficznym studium Delphos pokazuje modernistyczne, kosmopolityczne i demokratyczne powołanie ruchu na rzecz międzynarodowego języka pomocniczego na początku XX wieku. Poglądy Pankhurst na temat motywacji i zasad przyszłego interjęzyka były szeroko rozpowszechnione przez międzynarodową społeczność na rzecz języka pomocniczego. Artykuł prezentuje jej wsparcie dla języka Interlingua jako przykład humanizmu naukowego, który zdominował początki interlingwistyki oraz odnosi jej aktywizm językowy do jej socjalistycznych i pacyfistycznych poglądów.
Źródło:
Język. Komunikacja. Informacja; 2017, 12; 103-112
1896-9585
Pojawia się w:
Język. Komunikacja. Informacja
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Ecological projects from the perspective of economic and environmental impacts - a case study of galvanic cell manufacturer
Autorzy:
Góralski, Błażej
Grabowska, Marta
Studziński, Adam
Maletič, Matjaž
Maletič, Damjan
Powiązania:
https://bibliotekanauki.pl/articles/1841390.pdf
Data publikacji:
2020
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
sustainable development
environmental impact
auxiliary processe
case study
Opis:
Sustainable development refers to the development of a business in such a way that future generations will be able to satisfy the same needs. This article describes how sustainable development can be measured by economic performance and a positive impact on the natural environment. A general indicator of a company’s environmental impact is presented in the article. It can be determined, on the one hand, by a company’s environmental impact, and on the other hand, by savings in the use of natural resources, which is associated with savings in a financial sense. Therefore, it can be used to analyze the progress of sustainability in terms of environmental and economic performance. The case study provides an example of how emissions and energy factors can be analyzed to form a synthetic indicator and create a general indicator.
Źródło:
Management and Production Engineering Review; 2020, 11, 4; 129-137
2080-8208
2082-1344
Pojawia się w:
Management and Production Engineering Review
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Ecological projects from the perspective of economic and environmental impacts – a case study of galvanic cell manufacturer
Autorzy:
Góralski, Błażej
Grabowska, Marta
Studziński, Adam
Maletič, Matjaž
Maletič, Damjan
Powiązania:
https://bibliotekanauki.pl/articles/1841391.pdf
Data publikacji:
2020
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
sustainable development
environmental impact
auxiliary processe
case study
Opis:
Sustainable development refers to the development of a business in such a way that future generations will be able to satisfy the same needs. This article describes how sustainable development can be measured by economic performance and a positive impact on the natural environment. A general indicator of a company’s environmental impact is presented in the article. It can be determined, on the one hand, by a company’s environmental impact, and on the other hand, by savings in the use of natural resources, which is associated with savings in a financial sense. Therefore, it can be used to analyze the progress of sustainability in terms of environmental and economic performance. The case study provides an example of how emissions and energy factors can be analyzed to form a synthetic indicator and create a general indicator.
Źródło:
Management and Production Engineering Review; 2020, 11, 4; 129-137
2080-8208
2082-1344
Pojawia się w:
Management and Production Engineering Review
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Estimation of Quadratic Finite Population Functions Using Calibration
Autorzy:
Pumputis, Dalius
Čiginas, Andrius
Powiązania:
https://bibliotekanauki.pl/articles/465643.pdf
Data publikacji:
2011
Wydawca:
Główny Urząd Statystyczny
Tematy:
calibrated estimator
penalized calibration
auxiliary variables
approximate variance
Opis:
Since the quadratic finite population functions can be expressed as totals over a synthetic population consisting of some ordered pairs of elements of the initial population, the traditional and penalized calibration technique is used to derive some calibrated estimators of the quadratic finite population functions. A linear combination of estimators discussed is considered as well. A comparison of approximate variances of the calibrated estimators is also presented. A simulation study is performed to analyze the empirical properties of the calibrated estimators of the finite population variance and covariance which appear as special cases of the quadratic functions. It is shown also how the calibrated estimators of the population covariance (variance) can be applied in regression estimation of the finite population total.
Źródło:
Statistics in Transition new series; 2011, 12, 2; 309-330
1234-7655
Pojawia się w:
Statistics in Transition new series
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Research on drum water level control of marine auxiliary boiler based on ADRC
Autorzy:
Gan, H.
Lv, B.
Powiązania:
https://bibliotekanauki.pl/articles/258530.pdf
Data publikacji:
2018
Wydawca:
Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
Tematy:
ADRC
robustness
adaptability
drum water level
marine auxiliary boiler
Opis:
SThe active disturbance rejection control (ADRC) exhibits strong robustness and adaptability in the presence of strong interference of a large class of uncertain systems. In order to better control the water level of the auxiliary boiler drum, this paper applies the ADRC to improve its control precision, robustness and timeliness. Firstly, the change of drum water level in a large oil tanker auxiliary boiler is analyzed and the dynamic equation is established. After the mathematic changes, the dynamic equation is transformed into a two-order system. Aiming at the characteristics of nonlinear, time-varying and strong disturbance of the boiler water level control system in marine auxiliary boiler, studying the ADRC that includes tracking differentiator (TD), extended state observer (ESO), nonlinear feedback (NLSEF) and disturbance compensation of four parts. The establishment of two kinds of two-order ADRC controller to control the drum level. Through the theoretical analysis and simulation experiment test, and comparing with the cascade control strategy, the experimental results show that the active disturbance rejection controller satisfies the steady state response index of the system, and has good timeliness and accuracy to the control of water level of the drum.
Źródło:
Polish Maritime Research; 2018, S 2; 35-41
1233-2585
Pojawia się w:
Polish Maritime Research
Dostawca treści:
Biblioteka Nauki
Artykuł
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