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Wyświetlanie 1-15 z 4850
Tytuł:
Differentiable semigroups
Autorzy:
Holmes, J. P.
Powiązania:
https://bibliotekanauki.pl/articles/726931.pdf
Data publikacji:
1974
Wydawca:
Polska Akademia Nauk. Instytut Matematyczny PAN
Źródło:
Colloquium Mathematicum; 1974-1975, 32, 1; 99-104
0010-1354
Pojawia się w:
Colloquium Mathematicum
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
CHBDC buried structures: challenges in keeping pace with practice and innovation
Autorzy:
Newhook, J. P.
Powiązania:
https://bibliotekanauki.pl/articles/384004.pdf
Data publikacji:
2017
Wydawca:
Politechnika Poznańska. Wydawnictwo Politechniki Poznańskiej
Tematy:
codes
finite element modelling
buried structures
foundations
buckling
construction
cold regions
Opis:
Soil-steel structures have been part of Canadian design codes since the 1970s. The inclusion in the Ontario design codes was necessary due to a growing use of flexible buried structures in practice. Since those early developments, the subsequent code committees have always strived to find the appropriate balance between the primary objective of providing design criteria that reflect the safety and serviceability requirements of the code and incorporating the significant practical experience of owners, engineers and industry. Each decade has seen innovations in products and applications as well as advances in research and numerical modelling. Editions of the code have acknowledged these changes, often in the non-mandatory sections, but have sometimes struggled to provide specific criteria. Instead it has provided general guidance or framework for design. Currently, many of the existing design clauses do not directly cover the applications of both flexible and rigid buried structures in regular use today. This paper describes the key updates being proposed for the Buried Structures section of the Canadian Highway Bridge Design Code. These changes are based on input from owners, engineers and industry describing the needs for current design and practice as well as a modem framework for permitting innovation. The major changes include areas such of finite element analysis, foundation design, conduit wall buckling and the use of flexible structures in cold regions susceptible to permafrost. These major changes will be discussed conceptually as final approval is still pending before inclusion in the 2019 version. The paper will describe some of the background and rationale for the proposals. Finally, the paper will discuss the challenges faced by the sub-committee in determining what should be included in the mandatory sections of the code or in commentary.
Źródło:
Archiwum Instytutu Inżynierii Lądowej; 2017, 23; 21-33
1897-4007
Pojawia się w:
Archiwum Instytutu Inżynierii Lądowej
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Past, Present & Future of Thermally Stable Explosives
Autorzy:
Agrawal, J. P.
Powiązania:
https://bibliotekanauki.pl/articles/358166.pdf
Data publikacji:
2012
Wydawca:
Sieć Badawcza Łukasiewicz - Instytut Przemysłu Organicznego
Tematy:
explosives
thermally stable explosives
heat-resistant explosives
Opis:
Explosives with improved high temperature properties are usually referred to as 'thermally stable explosives' or heat-resistant explosives. They are safer, more reliable and more stable at elevated temperatures and find applications in modern Ordnance, Space and Nuclear applications. This paper discusses general approaches for the synthesis of thermally stable explosives, their properties and specific applications. This paper also gives a comparative account of the properties of some of the most thermally stable explosives reported so far. Based on their ease of synthesis, properties (mainly stability at elevated temperatures and insensitivity to impact, friction and percussion) and cost, TATB is considered as a benchmark, thermally stable explosive which is discussed in detail. Furthermore, this review also describes the synthesis and properties of BTDAONAB which does not melt below 550 °C and is considered a better thermally stable explosive than TATB. Finally, a new line of research in this field in the years to come is also highlighted.
Źródło:
Central European Journal of Energetic Materials; 2012, 9, 3; 273-290
1733-7178
Pojawia się w:
Central European Journal of Energetic Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Parametrical method for determining optimal ship carrying capacity and performance of handling equipment
Autorzy:
Michalski, J. P.
Powiązania:
https://bibliotekanauki.pl/articles/258961.pdf
Data publikacji:
2016
Wydawca:
Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
Tematy:
ship design
deadweight and cargo handling optimization
required freight rate
Opis:
The paper presents a method of evaluating the optimal value of the cargo ships deadweight and the coupled optimal value of cargo handling capacity. The method may be useful at the stage of establishing the main owners requirements concerning the ship design parameters as well as for choosing a proper second hand ship for a given transportation task. The deadweight and the capacity are determined on the basis of a selected economic measure of the transport effectiveness of ship – the Required Freight Rate. The mathematical model of the problem is of a deterministic character and the simplifying assumptions are justified for ships operating in the liner trade. The assumptions are so selected that solution of the problem is obtained in analytical closed form. The presented method can be useful for application in the preliminary ship design or in the simulation of pre-investment transportation task studies.
Źródło:
Polish Maritime Research; 2016, 2; 19-24
1233-2585
Pojawia się w:
Polish Maritime Research
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
An algorithm for preliminary estimating hull structure mass and mass centre height of inland navigation ships
Autorzy:
Michalski, J. P.
Powiązania:
https://bibliotekanauki.pl/articles/259173.pdf
Data publikacji:
2005
Wydawca:
Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
Tematy:
preliminary ship design
ship structure
preliminary ship mass estimation
Opis:
The paper presents an algorithm for preliminary calculation of mass and mass centre height of hull structure of inland navigation ships. It was elaborated basing on requirements of the Rules for the Classification and Construction of Inland Navigation Ships of Polish Register of Shipping, with application of a simplified method of estimating mass of hull plating stiffeners. The algorithm deals with the dimensioning of scantlings of structural members of classical ships intended for shipping dry cargo, and dry and liquid bulk cargoes; however it does not cover ships of entirely different structural arrangement such as roll-on-roll-offships fitted with heavy decks, as the dimensioning of their scantlings is based on different models.
Źródło:
Polish Maritime Research; 2005, 1; 8-12
1233-2585
Pojawia się w:
Polish Maritime Research
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A parametric method for preliminary determining of mass characteristics of inland navigation ships
Autorzy:
Michalski, J. P.
Powiązania:
https://bibliotekanauki.pl/articles/259549.pdf
Data publikacji:
2005
Wydawca:
Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
Tematy:
Inland waterways vessels
ship preliminary design methods
Opis:
This paper presents a method for estimation of mass characteristics of vessels, elaborated with the use of an algorithm based on requirements of the Rules for the Classification and Construction of Inland Waterways Vessels of Polish Register of Shipping, and on a simplified method [6] for determination of mass of hull plating stiff"eners. The dimensioning method of hull structure scantlings based on this algorithm concerns classical vessels intended for the carrying of general cargo, dry and liquid bulk cargoes, which determine the range of the method application. The method does not cover vessels of different construction, e.g. roll-on-roll-off type vessels equipped with heavy decks, as the dimensioning of their scantlings is based on different relationships and models.
Źródło:
Polish Maritime Research; 2005, 3; 9-14
1233-2585
Pojawia się w:
Polish Maritime Research
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Parametric method for evaluating optimal ship deadweight
Autorzy:
Michalski, J. P.
Powiązania:
https://bibliotekanauki.pl/articles/259752.pdf
Data publikacji:
2014
Wydawca:
Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
Tematy:
ship design
owners requirements
optimal deadweight
required freight rate
Opis:
The paper presents a method of choosing the optimal value of the cargo ships deadweight. The method may be useful at the stage of establishing the main owners requirements concerning the ship design parameters as well as for choosing a proper ship for a given transportation task. The deadweight is determined on the basis of a selected economic measure of the transport effectiveness of ship – the Required Freight Rate (RFR). The mathematical model of the problem is of a deterministic character and the simplifying assumptions are justified for ships operating in the liner trade. The assumptions are so selected that solution of the problem is obtained in analytical closed form. The presented method can be useful for application in the pre-investment ships designing parameters simulation or transportation task studies.
Źródło:
Polish Maritime Research; 2014, 2; 3-8
1233-2585
Pojawia się w:
Polish Maritime Research
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A method of predicting main propulsion power for inland waterways push trains
Autorzy:
Michalski, J. P.
Powiązania:
https://bibliotekanauki.pl/articles/260437.pdf
Data publikacji:
2006
Wydawca:
Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
Tematy:
inland waterways ships
ship design
brake horse power of push trains
Opis:
This paper presents a method of predicting effective power demand (brake horse power – B.H.P.) for propulsion of inland waterways push train, useful in the preliminary design stages. By using it, on the basis of known main particulars of a given push train, i.e. its length, breadth, draught and speed, a generalized Admiralty formula can be determined and then the pusher propulsion power can be preliminarily predicted by making use of the elaborated structure of the formula. Application of the method is illustrated on the example of a two-segment push train of inland waterways passenger ship designed in the frame of the Eureka INCOWATRANS E!3065 project.
Źródło:
Polish Maritime Research; 2006, S 2; 43-46
1233-2585
Pojawia się w:
Polish Maritime Research
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A method for preliminary estimation of the length of midship body block to be inserted during ship’s conversion
Autorzy:
Michalski, J. P.
Powiązania:
https://bibliotekanauki.pl/articles/260473.pdf
Data publikacji:
2017
Wydawca:
Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
Tematy:
ship design
ship conversion
increase of ship deadweight
lengthening of ships
Opis:
The paper presents a method for preliminary estimation of the length of the midship body block, which inserted in the original hull, increases the deadweight of the ship in line with a required quantity. The method may be useful for establishing the scope of conversion to better adjust the ship for transportation tasks. The problem is formulated by using a mathematical model so selected that its solution, under set of assumptions, is obtained in a closed analytical form. The presented method can be useful for application to pre-investment analysis of the ship conversion costs and functional profits.
Źródło:
Polish Maritime Research; 2017, 1; 42-46
1233-2585
Pojawia się w:
Polish Maritime Research
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Parametric method of prediction of the ship operating costs
Autorzy:
Michalski, J. P.
Powiązania:
https://bibliotekanauki.pl/articles/962819.pdf
Data publikacji:
2004
Wydawca:
Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
Tematy:
ship design theory
ship operating costs
Opis:
Paper presents results of studies on a parametric method of predicting ship operating costs - useful in the preliminary ship design. Conception and theoretical basis of the method are presented, identified are also factors of significant importance for the ship operating costs, taking into account changes in the value of money. Approximation formulae for estimating the operating cost components have been developed as well as a computational algorithm based on a minimum Required Freight Rate (RFR). The useful character of the method is illustrated by examples of operating cost predictions for four different ship types designed in the Eureka project E!2772, i.e.: SINE 202 universal container carrier, SINE 203 oil product tanker, SINE 204 ro-ro ship and SINE 205 river-sea ship.
Źródło:
Polish Maritime Research; 2004, S 1; 20-23
1233-2585
Pojawia się w:
Polish Maritime Research
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Rotundity, smoothness and duality
Autorzy:
Penot, J.-P.
Powiązania:
https://bibliotekanauki.pl/articles/970589.pdf
Data publikacji:
2003
Wydawca:
Polska Akademia Nauk. Instytut Badań Systemowych PAN
Tematy:
sprzężoność
wypukłość
sprzężenie
dwoistość
estymacja
wypukłość uogólniona
gładkość
conjugacy
convexity
coupling
duality
estimates
generalized convexity
rotundity
smoothness
subdifferential
Opis:
The duality between smoothness and rotundity of functions is studied in a nonlinear abstract framework. Here smoothness is enlarged to subdifferentiability properties and rotundity is formulated by means of approximation properties.
Źródło:
Control and Cybernetics; 2003, 32, 4; 711-733
0324-8569
Pojawia się w:
Control and Cybernetics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Philosophy for the Soul
Autorzy:
Rosensweig, J.P.
Powiązania:
https://bibliotekanauki.pl/articles/1833793.pdf
Data publikacji:
2021-10-30
Wydawca:
Uniwersytet Warszawski. Wydział Filozofii
Tematy:
openness
philosophical searching
individuality
public philosophy
receptivity
teaching philosophy
Opis:
Among the themes this article explores are the following: Can philosophy truly help us in times of crisis? What are the distinctive ways in which philosophy can be therapeutic and provide solace? What possible barriers exist to a person being able to be helped by philosophy? What is it to be genuinely open, to ideas, to life? What are the dynamics of pain and struggle in authentic searching? What is it to see yourself in such searching? What ways of teaching philosophy can allow students to derive maximum sustenance from philosophy?
Źródło:
Eidos. A Journal for Philosophy of Culture; 2021, 5, 2; 112-125
2544-302X
Pojawia się w:
Eidos. A Journal for Philosophy of Culture
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
SOI Technology: An Opportunity for RF Designers?
Autorzy:
Raskin, J.-P.
Powiązania:
https://bibliotekanauki.pl/articles/308241.pdf
Data publikacji:
2009
Wydawca:
Instytut Łączności - Państwowy Instytut Badawczy
Tematy:
crosstalk
high resistivity silicon substrate
MOSFET
nonlinearities
silicon-on-insulator
wideband characterization
Opis:
This last decade silicon-on-insulator (SOI) MOS-FET technology has demonstrated its potentialities for high frequency (reaching cutoff frequencies close to 500 GHz for n-MOSFETs) and for harsh environments (high temperature, radiation) commercial applications. For RF and system-onchip applications, SOI also presents the major advantage of providing high resistivity substrate capabilities, leading to substantially reduced substrate losses. Substrate resistivity values higher than 1 k? cm can easily be achieved and high resistivity silicon (HRS) is commonly foreseen as a promising substrate for radio frequency integrated circuits (RFIC) and mixed signal applications. In this paper, based on several experimental and simulation results the interest, limitations but also possible future improvements of the SOI MOS technology are presented.
Źródło:
Journal of Telecommunications and Information Technology; 2009, 4; 3-17
1509-4553
1899-8852
Pojawia się w:
Journal of Telecommunications and Information Technology
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-15 z 4850

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