نتایج جستجو برای: reflective coating
تعداد نتایج: 53821 فیلتر نتایج به سال:
Evaporating liquid layers are found in many areas of science and technology, so their practical significance is rather high. Examples include evaporative cooling and numerous coating applications. In the latter a substrate is coated with a layer of solution which, upon the evaporation of solvent, leaves a layer of solute on the surface of the substrate. The main difference between various coati...
The internal temperature variation of ballastless track is very complicated under the effect a sunlit environment, and there are serious transverse vertical gradients, which will cause cracking deformation structure. In this paper, an ANSYS analysis model for track, considering box girder structure, established based on environmental information bridge characteristics structural system. conside...
در اثر برخورد پرتوهایی با طول موج کوتاه به یک سطح، دمای آن افزایش می یابد و این فرایند سبی گرم شدن سطح می گردد. جهت کاهش دمای یک سطح از پوشش های انتخابی انعکاسی می توان استفاده می گردد. دمای سطح مورد استفاده باید زیر نقطه ذوب یا فداشوندگی باشد در این پایان نامه، اثرات انرژی تابشی بر کره های پوششدار بررسی شده که کاربرد اصلی آن در طراحی لنزهای صنعتی در فن آوری مایکروویو می باشد. توسط مدل های تئور...
A multispectral anti-reflective coating of high radiation strength for laser applications in the IR spectrum nonlinear ZnGeP2 crystals has been developed first time. The was constructed using YbF3/ZnS. obtained by a novel approach ion-beam deposition these materials on substrate. It LIDT more than 2 J/cm2. Optimal layer regimes were found film density and low absorption, good adhesion to substr...
Retro-reflectivity is a promising surface capability, which has attracted the interest of researchers for building applications in order to counteract Urban Heat Island (UHI) effects. This work aims at studying impact substrate material on optic performance retro-reflective (RR) coatings. Three types materials were investigated: smooth pine wood panels, rough plywood and acetate sheets. The RR ...
External Thermal Insulation Composite Systems (ETICS) enhance building aesthetics and optimize thermal performance while offering protection against weather, fire, harmful agents. Key to these capabilities are properties of ETICS rendering. We have applied specialized organic renderings, including modified acrylic resins, additives, reflective pigments, mitigate color bleaching stress cracking ...
This study examined the effects of cooperative learning techniques (CLT) on vocabulary achievement of reflective/impulsive Iranian EFL Learners. From among 130 students at Fajr institute in Dehdasht, Kohkiloyeh and Boyer Ahmad Province, Iran, 90 participants were selected based on their performance on the Oxford Placement Test (OPT). The participants were then divided into two experimental grou...
This study examined the effects of cooperative learning techniques (CLT) on vocabulary achievement of reflective/impulsive Iranian EFL Learners. From among 130 students at Fajr institute in Dehdasht, Kohkiloyeh and Boyer Ahmad Province, Iran, 90 participants were selected based on their performance on the Oxford Placement Test (OPT). The participants were then divided into two experimental grou...
a knowledge of soil surface conditions, especially desert crust, salt crust and desert varnish is useful for improving classification of remotely sensed data. desert crust can generate high levels of reflectance, similar to those areas with high salt concentration and non-saline soil. therefore, soil surface crusts might bias thematic remote sensing of soils. in this study, we evaluated the eff...
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