نتایج جستجو برای: 8 hz to 256 hz
تعداد نتایج: 10765527 فیلتر نتایج به سال:
in this paper, multivariate calibration methods of partial least squares (pls) and principle component regression (pcr) were investigated in simultaneously determination of hydrazine (hz) and acetylhydrazine (ahz). the aforementioned methods are based on formation of the silver nanoparticles (agnps) from the reaction of hz and ahz with ag+ ions as oxidizing agent in the presence of citrate ions...
today there are different vibration isolators used in industries according to the weight and excitation frequency of the machines which have vibration. one of them is air spring which is in two types: convoluted air spring and membrane air spring. convoluted air springs are used to control vibrations in low frequency (usually lower than 10 hz) and the membrane ones are used in high frequency (u...
Toplum ıslâhı her zaman güncelliğini koruyan bir konu olmuştur. Bundan dolayı da tarihin döneminde yaşanan kötü durumu düzeltmek için ıslâh ve değişim çağrısı yapan, değişik isimlerle ortaya çıkan toplum ıslâhına çözüm sunmaya çalışan, çeşitli akım ideolojiler hep var Fakat bu hareketler –bazı yönlerden muvafık olmuşlarsa da- kapsamlı gerçekleştirememişlerdir. Ancak tarih, en mükemmel faaliyeti...
Introduction: In the most industrial environment, workers are exposed to noise everyday. Exposure to this physical hazardous agent can cause immediate as well as delayed adverse effects. Cognitive performance decrement is one of the adverse effects of noise exposure which its main consequences is occupational accidents. This study attempted examine the effect of exposure to different levels of ...
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