Search results for " Methods"
showing 10 items of 4102 documents
Control design for a hypersonic aircraft using a switched linear parameter-varying system approach
2012
This paper is concerned with the control problem of an air-breathing hypersonic aircraft using a switched linear-parameter-varying systems approach. The rigid non-linear longitudinal model of a generic hypersonic aircraft is adopted with the aim of verifying the design methodology of the developed controller and switching logic. By linearizing the non-linear model of the hypersonic aircraft at trim points and dividing the velocity range into several parts, a switched linear parameter-varying model for the underlying system is derived. With the aid of multiple Lyapunov-like functions technique, controllers that ensure the tracking of given commands of the closed-loop system are designed und…
Optimization of the contact surface shape of a shrinkage fit
1998
Amongst many processes existing today for the assembly of two cylindrical parts, the shrinkage fit is commonly used. However, in the calculation methods, the contact surfaces are assumed to be perfect. Therefore, in order to apply these, the standards necessitate very small geometrical tolerances. The objective of the present paper is to show that it is possible to take into account form defects by closely conformed contact modelling and to have a good representation of reality: form defects always exist to an increasing extent and are inherent in all kinds of manufacturing processes. Finally, it is shown that the presence of defects can be beneficial, allowing optimization from both a mech…
Optimum design of two-level MCML gates
2008
In this paper, we address the problem of the optimum design of two-level MOS Current Mode Logic (MCML) gates. In particular, we describe a design methodology based on the concept of crossing-point current already introduced for the optimum design of single-level MCML gates. This methodology is suited both for automated implementation and graphic estimate of the optimum design. Moreover, it clearly shows how some important design parameters affect the optimum values of delay and power consumption. Several gates were designed in an IBM 130 nm CMOS technology. The results of SPICE simulations, reported here, demonstrate the effectiveness of the proposed design methodology.
Low-Power Design of Delay Interpolating VCO
2008
In this paper, a design methodology for low-power MCML based delay interpolating VCOs is presented. The methodology allows a fast and accurate graphical evaluation of the optimum design. It utilizes two closed form expressions for the upper and lower oscillation frequencies of the VCO. An expression of the tuning range is also derived. The effectiveness of the proposed design methodology has been tested by simulating several VCOs in an IBM 0.13 mum CMOS technology.
The Taguchi Method and Conditions for its Implementation in High Performance Athletic Training
2014
Abstract The purpose of this research is to present the main features of the Taguchi method, a method used today mainly in the optimization of industrial processes and products. It allows identification of process parameters that may contribute to system optimization; in our case, it allows the selection of the most effective means of training aimed at optimizing processes. After having determined the relevant characteristics in athlete training, we developed a model based on the Taguchi method, adapting the characteristics of that training for implementation in high performance athletic training. We also checked the optimum conditions for the implementation of management techniques and for…
Lean design improves both health-care facilities and processes: a literature review
2014
This article presents a literature review of the challenges and possibilities for Lean design in modern health-care facilities. Many of today's health-care facilities are in dire need of renovation since limited financial resources among health-care demand improved work process efficiency, safety and employee well-being. Lean philosophy has been successfully implemented into hospitals with up-and-running hospital processes, but has not been thoroughly tested as a design methodology. The principles of Lean do not contradict with user-centric, participatory or ergonomic design approaches and thus the possibilities of using Lean as a complementary design methodology to the aforementioned appro…
MODERN DIDACTIC TERMS IN THE CONTENT OF LATVIAN LANGUAGE AND LITERATURE STUDIES
2015
The article is devoted to a pending matter in the Latvian linguistics and methodology of language and literature – the formation of the system of terminology. The 90-ies of the 20th century when Latvia gained its national independence brought changes not only in the political and economic life but also in the terminology because new realities, which appeared in life, needed new names. Essential transformation in education brought along changes in the nomination system of the specific realities in the sphere. By establishing broader contacts with the pedagogical information field of the Western countries, translating scientific articles one comes in touch with specific concepts of the sphere…
Interaktīvo metožu efektiviāte, mācot angļu valodas gramatiku vidusskolā
2016
Bakalaura darba mērķis ir pierādīt interaktīvo metožu efektivitāti, mācot saliktās tagadnes laiku angļu valodā. Šis pētījums sastāv četrām nodaļām. Pirmajā nodaļā akcentēts angļu valodas gramatikas nozīmīgums un sniegts ieskats gramatikas teorijā. Tiek aprakstītas galvenās iezīmes un atšķirības mutvārdu un rakstveida gramatikā, kā arī minēts, kāpēc angļu valodas gramatika būtu jāmāca un aprakstīta skolotāja loma mācību procesā. Otrajā nodaļā pētītas dažādas angļu valodas gramatikas mācīšanas tehnikas un metodes. Trešajā nodaļā aprakstīti interaktīvie paņēmieni, mācot angļu valodas gramatiku vidusskolā. Bakalaura darba praktiskā daļa ietver eksperimentu. Šī daļa veltīta novadīto stundu aprak…
Teaching English in Finnish upper secondary schools: How English is taught and what are the most effective ways of learning
2010
Tämän proseminaari-tutkielman tarkoituksena oli saada selville, millaisia opetusmenetelmiä opettajat käyttävät englannin tunneilla suomalaisissa lukioissa ja millainen opetus on oppilaiden mielestä hyödyllisintä englannin kielen oppimisessa. Lisäksi tutkimuksen tarkoituksena oli vertailla oppilaiden ja opettajien vastauksia näihin kysymyksiin. Englannin kielen käyttö on lisääntynyt paljon lyhyessä ajassa globalisoituvan yhteiskunnan seurauksena, minkä vuoksi on tärkeää saada selville, onko suomalaisissa lukioissa annettu opetus nimenomaan oppilaiden mielestä höydyllistä ja tehokasta. Aihetta on tutkittu viimeksi Suomessa kaksikymmentä vuotta sitten ja tämän vuoksi uusi tutkimus oli tarpeel…
Ensemble methods for item-weighted label ranking: a comparison
2022
Label Ranking (LR), an emerging non-standard supervised classification problem, aims at training preference models that order a finite set of labels based on a set of predictor features. Traditional LR models regard all labels as equally important. However, in many cases, failing to predict the ranking position of a highly relevant label can be considered more severe than failing to predict a trivial one. Moreover, an efficient LR classifier should be able to take into account the similarity between the items to be ranked. Indeed, swapping two similar elements should be less penalized than swapping two dissimilar ones. The contribution of the present paper is to formulate more flexible item…