نتایج جستجو برای: core samples
تعداد نتایج: 627977 فیلتر نتایج به سال:
Several techniques have been used for sand production control in sandstone reservoirs.The main objective of this research is to present a suitable resin to be used as a consolidation agent in oil reservoirs. To achieve this purpose, urea-formaldehyde resin, phenol-formaldehyde resin, and modified urea-formaldehyde resin were selected to be studied. Core samples were made by the sand sample prov...
nanotechnology is a general term which is related with field of all advanced science term that generally predicates with all modern technologies which consider nanoscales. improvement in the quality of products by adding some nanoparticles and study of their behavior in the presence of these nanoparticles have been obtained in many researches. on the other hand numerous demands for sowing ...
مهمترین عامل هپاتیت non-a, non-b منتقل شونده از راه خون، ویروس هپاتیت c (hcv)است. اندازه ژنوم این ویروس در حدود 6/9 کیلوباز است که در یک قاب خواندنی باز 10 پروتئین را کد می کند. اخیرا گزارش شده است که از قسمت کد کننده hcv-core، پروتئین 17 کیلودالتونی بنام f ترجمه می شود که نقش آن مشخص نشده است اما ممکن است که مانند پروتئین coreبا تاثیر بر سیستم ایمنی نقش احتمالی در پیشرفت بیماری به سمت فاز مز...
Sandwich panel with central core honeycomb aluminum as one of the main shielding structures because of their high strength-to-weight ratio and improved energy absorption capacity, has been attracted the attention of many researchers and practitioners in recent years. This paper initiates and presents a new type of central core honeycomb formed by hydroforming process. The study is augmented by ...
Sandwich panel with central core honeycomb aluminum as one of the main shielding structures because of their high strength-to-weight ratio and improved energy absorption capacity, has been attracted the attention of many researchers and practitioners in recent years. This paper initiates and presents a new type of central core honeycomb formed by hydroforming process. The study is augmented by ...
Despite the importance of core muscles in kinetic chains, the importance of each muscle compared to others has rarely been investigated. The purpose of this study was to compare the effect of each core muscle fatigue on lower extremity function tests. This quasi-experimental study with a pretest-posttest design was performed on 30 physical educations, female students with the mean age of 23.46±...
todays applying concrete structures is more usual than other structures which are used in buildings as in most of the world’s countries the application ratio of concrete to steel has increased from 10 to 1. sometimes these structures require strengthening vulnerable members because of deficiency in their loading system in usual and critical conditions. there are different methods for strengthen...
aluminum foams are a novel branch of advanced materials with superior properties. sandwich structures with aluminum foam core are good energy absorbers. in this paper, mechanical properties and energy absorption of aluminum foam sandwich panels subjected to quasi-static perforation tests with conical-nosed indenter were investigated experimentally. for this purpose sandwich panels consisting of...
دایورسیتی انتقال متعامد (مانند دایورسیتی در زمان و فرکانس) یکی از روش های ایجاد دایورسیتی در فرستنده می باشد که در سیستم هایی که تحت تاثیر فیدینگ چند مسیره قرار می گیرند بسیار کارآمد می باشد. اما در این روش? کارآمدی پهنای باند با افزایش تعداد شاخه های دایورسیتی کاهش می یابد و از این رو در سیستم های مخابرات بی سیم کمتر مورد توجه قرار گرفته است. اخیراً بیان شده است که با استفاده از نگاشت بیت های م...
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