نتایج جستجو برای: bentley hammer

تعداد نتایج: 3884  

Journal: :مهندسی سازه 0
یوسف حسن زاده جلیل ابریشمی جواد زمانیان

water hammer is one of the destructive hydrodynamic phenomena which is established in most pumping stations, transmission lines and hydroelectric power plants. this phenomenon gives rise to abnormal pressures, cavitation occurrence and finally pipe explosion and disturbance of the whole system. to control the maleffects of this event, different methods are devised. one of which is sometimes eno...

2006
Leonid Teverovskiy Owen Carmichael Howard Aizenstein Nicole Lazar Yanxi Liu Leonid A. Teverovskiy Owen T. Carmichael Howard J. Aizenstein Nicole A. Lazar

The power and validity of voxel based and tensor based morphometry methods depend on the accuracy of the brain image registration algorithms they employ. We propose a mutual information based quantitative evaluation method to compare the performance of two publicly available deformable registration packages: HAMMER and algorithms in the ITK package (FEM-Demons) The advantage of our approach is ...

In this paper, after collecting the rock samples from eight mines and one high way slope, the tests for determination of dry density, Uniaxial Compressive Strength, tensile Strength (Brazilian Test), elastic modulus, Schmidt hammer rebound number have been done on samples. In addition, in order to calculating the mean size of rock grains, quartz content, hardness and abrasivity, a thin sections...

ژورنال: علوم آب و خاک 2021

Water hammer is one of the unsteady flows in urban water distribution networks, which has been of great importance due to the damage caused to the pipeline and has always been of interest to researchers. In this study, the phenomenon of water hammer due to the sudden closure of the valve in the downstream end has been investigated in a laboratory and using a numerical model. In the laboratory s...

ژورنال: :دانش آب و خاک 0
پریسا نظری دانشجوی کارشناسی ارشد گروه مهندسی آب، دانشگاه ارومیه حسین رضایی دانشیار گروه مهندسی آب، دانشکده کشاورزی، دانشگاه ارومیه

از انواع جریان­های هیدرولیکی در لوله­ها، جریان­های میرا است که به طور خاص ضربه قوچ نامیده می­شود. جریان­های میرا از یک حالت ماندگار شروع شده و به وضعیت ماندگار دیگری خاتمه پیدا می­کنند. روش­های محاسبه متعددی جهت بررسی پدیده ضربه قوچ از سال 1950 معرفی و به کار برده شده­اند. یکی از کاربردی­ترین روش­ها، معادله ژاکوفسکی می­باشد که به عنوان روش حل دستی انتخاب گردیده است. از آنجائی که اغلب نرم­افزار­...

Journal: :Far Eastern entomologist 2023

Odontomutilla listopadovi sp. n. is described and illustrated from Myanmar (Mandalay Region). A female of new species (male unknown) strikingly differs congeners by having two golden spots located transversely in the basal half second metasomal tergum (lacking such or 1(3) other genus). The genus Ashmead, 1899 newly recorded Myanmar. Three wrongly me species: Krombei¬nidia margheritae (Hammer, ...

Journal: :Archiv für Ohrenheilkunde 1892

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