نتایج جستجو برای: rocket

تعداد نتایج: 4529  

2005
Robert M. Rabin Tom Whittaker

This note describes a web-based tool for storm analysis using multiple data sets developed for use in research of thunderstorms and forecasting applications. The tool was developed for users to monitor atmospheric changes along the path of storm systems. It demonstrates the use of the Thematic Real time Environmental Data Distributed Services (THREDDS) being developed by University Corporation ...

ژورنال: مواد پرانرژی 2020

Cracking is the breaking of bonds in a part of the propellant polymer due to the existing stresses that change the structure of the propellant polymer and they are classified into two general categories: macrocrack and microcrack. The service life of rocket engines is largely a function of the mechanical properties of the solid rocket propellant, the aging characteristics of the rocket propulsi...

2008

oscillations may have a negative influence on the unguided rocket firing precision, it is necessary to evaluate the exactly influence of the disturbance factors on the rocket movement upon the launcher. This study presents the equations of the rocket movement upon the launcher under the disturbance factors action, taking into consideration that the rocket is the integrated part of the rocket-la...

Journal: :علوم گیاهان زراعی ایران 0
سید محمد امین فانی یزدی دانشگاه پیام نور، گروه علمی کشاورزی، 4697-19395 تهران محمد رضوانی دانشگاه آزاد اسلامی، واحد قائمشهر، گروه شناسایی و مبارزه با علف های هرز، قائمشهر محمد حسن راشد محصل دانشگاه فردوسی مشهد حسن کرم زاده دانشگاه آزاد اسلامی واحد قائمشهر

in order to investigate factors affecting on seed germinating of london rocket (sisymbrium irio), lab experiments were set up in 2011 at the payamenoor university, mashhad, khorasan razavi province. effect of different concentrations of gibberellic acid (ga3) and cytokinin, wet and dry prechilling duration, hydrogen peroxide duration, ethanol, salt and osmotic stress and burial depth on seed ge...

2008
Slava Gerovitch SLAVA GEROVITCH

This article explores the impact of the professional culture of rocket engineering in Stalin’s Soviet Union on the engineering and organizational practices of the space program during the Khrushchev era. The Stalinist legacy and the dual military / civilian character of rocket engineers’ work profoundly affected the identity of this elite part of Soviet technical intelligentsia. Focusing on suc...

Journal: :IEICE Transactions 2011
Woong-Kee Loh Yang-Sae Moon Heejune Ahn

We propose a robust and efficient algorithm called ROCKET for clustering large-scale transaction databases. ROCKET is a divisive hierarchical algorithm that makes the most of recent hardware architecture. ROCKET handles the cases with the small and the large number of similar transaction pairs separately and efficiently. Through experiments, we show that ROCKET achieves high-quality clustering ...

Journal: :Journal of economic entomology 2005
Francisco R Badenes-Perez Anthony M Shelton Brian A Nault

Yellow rocket, Barbarea vulgaris (R. Br.) variety arcuata, was evaluated as a trap crop for diamondback moth, Plutella xylostella (L.) (Lepidoptera: Plutellidae), in cabbage, Brassica oleracea L. variety capitata, in 2003 and 2004. In 2003, the numbers of P. xylostella larvae found in field plots of cabbage alone were 5.2-11.3 times higher than those on cabbage plants in plots that included cab...

2017
Lesong Zhou Zheng Sheng Zhiqiang Fan Qixiang Liao

This article gives an in-depth analysis of the experimental data of the TK-1G sounding rocket installed with the satellite navigation system. It turns out that the data acquisition rate of the rocket sonde is high, making the collection of complete trajectory and meteorological data possible. By comparing the rocket sonde measurements with those obtained by virtue of other methods, we find that...

Journal: :دانش علف های هرز ایران 0
رضا دیهیم فرد کارشناسی ارشد علی حجازی استاد دانشگاه اسکندر زند محقق محمد علی باغستانی محقق غلامعباس اکبری استاد دانشگاه سعید صوفی زاده استاد دانشگاه

crops that better tolerate weed competition or preempt resources from weeds may reduce dependence on herbicides and benefit an integrated weed management program. a field trail was conducted to determine the morphophysiological characteristics affecting tolerance and weed suppressive ability of some winter wheat cultivars in competition with rocket. the experimental treatments consisted of eigh...

2009
Jir-Ming Char

Rocket plume temperature distribution plays an important role on the heat transfer analysis of launch carriers. Thus, a non-intrusive IR scanner is used in this paper to analyze the influence of spin motion on plume centerline temperature measurements of spinning solid-propellant rockets. Results show that the average error of temperature measurement is below 3.5% even with a 10% error of estim...

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