نتایج جستجو برای: efficiency of propulsion system

تعداد نتایج: 21346663  

Journal: :Technium: Romanian Journal of Applied Sciences and Technology 2020

2015
Andras Bela Olah

In this study an initial concept is described. This shows the possibility of connecting axially an ordinary jet engine, a ramjet engine and a scramjet engine. Furthermore rocket mode is also available in this design. The different modes can be changed by this integrated system as easily as the different modes, or nosecone stages can be changed by ordinary jet engines below and above the speed o...

2008
M. C. Louwerse

M.C. Louwerse, H.V. Jansen, J.L.P.A. Moerel, H.M. Sanders, B.T.C. Zandbergen Dept. of Transducer Science & Technology, University of Twente, P.O. Box 217, 7500 AE Enschede, The Netherlands TNO Defence, Security and Safety, P.O. Box 45, 2280 AA Rijswijk, The Netherlands Dept. of Earth Observation and Space Systems, Delft University of Technology, P.O. Box 5058, 2600 GB Delft, The Netherlands ema...

پایان نامه :0 1391

employees always concern about losing their job , or in other word , losing their income resources. for this purpose, every government requires strong system for covering these concerns. the unemployment insurance (ui) program’s can be used for achieving this goal. in this thesis, we price ui based on the insurance history of employee and the duration of being unemployed. we use the weibull dis...

2008
Alex Leshansky Oded Kenneth

In this work we address the " smoking ring " propulsion technique, originally proposed by Purcell in [1]. We first consider self-locomotion of a doughnut-shaped swimmer powered by surface tank-treading. Different modes of surface motion are assumed and propulsion velocity and swimming efficiency are determined. The swimmer is propelled against the direction of its outer surface motion, the inne...

پایان نامه :0 1374

this experimental study has been conducted to test the effect of oral presentation on the development of l2 learners grammar. but this oral presentation is not merely a deductive instruction of grammatical points, in this presentation two hypotheses of krashen (input and low filter hypotheses), stevicks viewpoints on grammar explanation and correction and widdowsons opinion on limited use of l1...

Journal: :JOURNAL OF THE MARINE ENGINEERING SOCIETY IN JAPAN 1981

پایان نامه :دانشگاه آزاد اسلامی - دانشگاه آزاد اسلامی واحد تهران مرکزی - دانشکده حقوق 1392

abstract the problems caused by the traditional system of criminal justice (which are based on remuneration and rehabilitation) such as, lack of attention to victim’s rights and position and society, underlie the emergence of restorative justice which had the victim-centered perspective, with respect to the role of the offender and participation of civil society. meanwhile, criminal mediation ...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه علامه طباطبایی 1390

insurers have in the past few decades faced longevity risks - the risk that annuitants survive more than expected - and therefore need a new approach to manage this new risk. in this dissertation we survey methods that hedge longevity risks. these methods use securitization to manage risk, so using modern financial and insurance pricing models, especially wang transform and actuarial concepts, ...

ژورنال: تحقیقات موتور 2020
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Due to the air pollution crisis and increase in greenhouse gases, emission standards are getting tougher gradually. In the other hand reducing the consumption of nonrenewable resources is one of the main goals of the automotive industries in the world. Using electric propulsion along with internal combustion engine is one of the answers. Different designs of Hybrid Electric Vehicles (HEV) have ...

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