نتایج جستجو برای: shaping

تعداد نتایج: 32713  

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه صنعتی خواجه نصیرالدین طوسی - دانشکده مکانیک و هوافضا 1390

چکیده : در این پایان نامه که در ادامه موضوع سمینار اینجانب صورت گرفته، مفاهیم کنترل مقاوم برای پیاده سازی بر روی یک مدل هواپیمای بدون سرنشین ارائه شده است. در ابتدا کلیه مفاهیم پایه کنترل مقاوم ارائه شده و پس از آن چندین نمونه از روش های پر کاربرد در زمینه کنترل مقاوم بطور کامل تشریح شده است. در مراحل بعدی مدل هواپیمای انتخابی تشریح شده و در فصل پس از آن برای یک شبیه سازی غیرخطی کامل و یک شبیه...

Journal: :پژوهش های قرآن و حدیث 0
علیرضا دل افکار دانشگاه تهران،دانشجوی دکتری مجید معارف دانشگاه تهران، استاد دانشگاه تهران

among the questions under consideration on the subject of the influence of qur'an over the shaping of literary sciences, is the subject of the influence of qur'an over the shaping of lexicography. in this case, two distinct viewpoints have been explained: the first viewpoint is that the source of all lexicographic studies is undoubtedly the very qur'an, and the second viewpoint i...

Journal: :iranian endodontic journal 0
vahid zand amin salem milani ayla hassani dehkharghani mahdi rahbar pardis tehranchi

introduction: one of the most important reasons for postoperative pain is the extrusion of debris from the apical foramen during preparation and shaping of root canals. the aim of this clinical trial was to evaluate the severity of postoperative pain with the use of two different engine-driven niti systems. methods and materials: ninety mandibular molars were randomly divided into two groups ( ...

2011
Sam Devlin Marek Grzes Daniel Kudenko

This paper investigates the impact of reward shaping in multi-agent reinforcement learning as a way to incorporate domain knowledge about good strategies. In theory [2], potential-based reward shaping does not alter the Nash Equilibria of a stochastic game, only the exploration of the shaped agent. We demonstrate empirically the performance of statebased and state-action-based reward shaping in...

2010
Matthew A. Coughlan Mateusz Plewicki Robert J. Levis

ABSTRACT Multiple foci are created along the propagation direction of a laser beam using simultaneous spatial and temporal focusing of an ultrafast laser pulse in conjunction with parametric pulse shaping. The pulses are characterized with scanning SEA TADPOLE. The longitudinal and transverse positions of the foci are controlled using phase and amplitude shaping in a 4-f laser pulse shaping sys...

2000
Anthony M. Bloch Naomi Ehrich Leonard Jerrold E. Marsden

We extend the method of controlled Lagrangians to include potential shaping for complete state-space stabilization of mechanical systems. The method of controlled Lagrangians deals with mechanical systems with symmetry and provides symmetry-preserving kinetic shaping and feedback-controlled dissipation for state-space stabilization in all but the symmetry variables. Potential shaping complement...

2006
Yong Xiao Peter J. Catto

Plasma shaping e¤ects, such as elongation, triangularity and Shafranov shift have long been considered an important ingredient in improving tokamak performance. It is known that the growth rate of ion temperature gradient (ITG) turbulence can be regulated by these shaping e¤ects and that the ITG turbulence level can also be regulated by zonal ‡ow. Moreover, recent numerical simulation shows tha...

2012
M. U. Khan I. Jan N. Iqbal J. Dai

Abstract: H Control designs are quite effective in robust design for systems under unstructured uncertainty, unknown disturbance and measurement noise. Conventional H loop-shaping is a reasonable method for designing the robust controller. H Loop-shaping guarantees closed-loop performance and robustness to generic unstructured dynamic uncertainty, where robustness to uncertainty is incorporated...

1999
Craig F. Cutforth Lucy Y. Pao

The technique of input shaping has recently been successfully applied to the problem of maneuvering exible structures without excessive residual vibration. In the method of input shaping, positive impulses are often desired because they can be used with any arbitrary (un-shaped) commands and do not cause actuator saturation (if these original unshaped commands do not cause ac-tuator saturation)...

Journal: :Ageing and Society 2016

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