نتایج جستجو برای: by geometrical positioning
تعداد نتایج: 7077804 فیلتر نتایج به سال:
The Helfrich-Hurault instability is a well-known mechanism behind the undulations that occur as result of strain upon liquid crystal systems with periodic ground states. In this review, elastic examined focus on layered crystals are geometrically frustrated. frustration relieved by in structure to maintain preferred layer spacing. Examples cholesteric and smectic confined between two spherical ...
The challenge in modeling and solving assembly planning problems lies integrating combinatorial optimization techniques for finding efficient task sequences resource assignments with geometrical reasoning to ensure the technological feasibility of plans. This paper proposes a Benders decomposition approach that separates macro-level problem, responsible sequencing assignment, from micro-level v...
in the recent years, targeted therapy of the neoplastic diseases is a current strategy used by oncologists. hence, design and discovery of novel targeted anticancer therapeutics is an interesting topic in the current research of medicinal chemistry. a new series of 1,3,4-thiadiazole derivatives were prepared and their anticancer activity was assessed against pc3, sknmc and ht29 cell lines by ap...
Nowadays, activities of companies in the dynamic and turbulent environments are described by factors such as competitive intensity, unstable market conditions, rapidly changing technologies, and short product life cycle. Under such conditions, an effective strategy for launching a product into the market increases the survival chance of a company and improves its performance. The purpose of thi...
In this paper, we perform a detailed study of the spectral response of the gold U-shaped nano-structures for different geometrical parameters and polarizations in order to obtain significant localization factor in the wavelength 1.55 μm. The obtained near-field distribution of electric fields reveals that resonances in these nano-structures correspond to the even and odd plasmonic modes dependi...
In this paper, numerical solution of beta-type Stirling engine was presented considering its non-ideal regenerator. To this end, the second-order model including heat and power losses was used. Then, a numerical code was applied for calculating geometrical and physical optimum values of the engine. To confirm the obtained results, the physical and geometrical parameters of the GPU-3 engine were...
Background : Neonatal period is one of the most important periods in human's life. Low birth weight and immaturity is often the cause of death. (weight less them 1000grm and pregnancy less than 30 weeks). One of the main cause of death in this period is respiratory distress syndrome. Objective : To determine the effect of prone and supine positioning oxygenation in preterm infants with resp...
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