نتایج جستجو برای: propellant inhibitor
تعداد نتایج: 212760 فیلتر نتایج به سال:
Titanium (IV) oxide as a burning rate catalyst is commonly used in some of the solid composite propellants. As the particle size of this component decreases, the final properties of the propellant will be changed. In this research, effects of using submicron titanium oxide, up to 0.5 percent by weight, have been investigated on properties of an HTPB/AP/Al propellant. TiO2 powder has relatively ...
In long-term trajectory planning for the International Space Station (ISS), translational burns are currently targeted sequentially to meet the immediate trajectory constraints, rather than simultaneously to meet all constraints, do not employ gradient-based search techniques, and are not optimized for a minimum total deltav (∆v) solution. An analytic formulation of the constraint gradients is ...
Abstract As the main launch energy of barrel weapon, dynamic mechanical properties gun propellant is very important to evaluate safety. Through transverse drop hammer impact damage test at room temperature and initial vivacity ratio propellant, crack growth law fracture degree damaged were obtained separately. Based on Hertz-Mindlin bonding contact model, discrete element model rosette 19-hole ...
As the development of small satellites, more commonly referred to as ‘microsats’ with masses in the range of 10-100 kg and ‘nanosats’ featuring masses from 1-10 kg, there emerge several new kinds of space missions, such as the formation flying and constellations of micro satellites, distributed onboard carrier wave radar, high resolution synthetic aperture remote sensing etc. Due to the continu...
شوری خاک یکی از عوامل مهم محیطی است که منجر به کاهش عملکرد گیاهان زراعی می شود. شناخت مکانیسم های مقاومت گیاهان در برابر تنش ها می تواند به شناسایی ژن های مقاومت و کاربرد آن ها در اصلاح گیاهان و افزایش محدوده کشت گیاهان منجر شود. روش آنالیز expressed sequence tag (est) و داده های ریزآرایه راهی سریع و منطقی برای شناسایی ژن های نامزد جدید برای مقاومت به تنش ها می باشد. در این تحقیق تعداد 2 کتابخا...
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