نتایج جستجو برای: very few researches have been performed
تعداد نتایج: 4537520 فیلتر نتایج به سال:
Effect of clamping pressure on electrical resistance between Gas diffusion layer (GDL) and bipolar plate is a very important parameter in Proton exchange membrane (PEM) fuel cells. For investigation of this matter some researches have been done in these years. But there is not an experimental investigation of clamping pressure effect on PEM electrical resistance. In this paper, some experimenta...
abstract when in administrative law the matter of administrative offences are raised, these offences would have legal nature if they are force able, some of these offences are related to administrative law, where as some other pelts are common in civil or penal law. the current research intends not only to consider the concept and foundation of administrative execution rules but also compares...
It is now about nine years since Hitzig's and Fritsch's experiments first attracted public attention to the question of the possibility of localising the centres of motion and sensation in the cortical structure of the brain. . Dr. Ferrier has followed up the researches of these physiologists with untiring industry, and his deductions from experimental, as well as from clinical and pathological...
abstract: the present thesis includes ; one preface and 11speeches , that each speech considered in different researches . the prefact part , studied grammer back ground , the first speech considered a brief description about grammatical credits . the second speech considered the different typs of sentences , from structure and meaning points of view . the third speech considered the verb es...
Introduction: Few researches have been conducted researches on the influence of the type of dental stone used for fabrication of casts on the adaptation of denture bases. The purpose of this study was to compare the effect of two types of stone casts on the accuracy of fit in complete denture bases. Methods: Using sixty fully replicated master casts obtained by duplicating a metal die represent...
In recent decades, research has growth Increasingly in Iran and, consequently, the country has risen dramatically in world rankings, based on the number of scientific documents. The impressive growth of the number of Iran researches, research experts increasingly focus on "research impact", and repeated emphasize on the issue of "use of research to improve society" in Iran superior governmental...
Passive walkers are robots, which perform a walking external control. This concept was published on 90’s by McGeer and there are lots of past few years. Keeping in mind performance and finding their optimums, simulating the biped and establishing a trend to its optimal design and and finally doing experimental researches, wou can be built has been considered, and then its walking performance se...
Interaction between the normal shock wave and the turbulent boundary layer in a supersonic nozzle becomes complex with an increase of a Mach number just before the shock wave. When the shock wave is strong enough to separate the boundary layer, the shock wave is bifurcated, and the 2nd and 3rd shock waves are formed downstream of the shock wave. The effect of a series of shock waves thus formed...
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