نتایج جستجو برای: hammer
تعداد نتایج: 3162 فیلتر نتایج به سال:
BACKGROUND Racetrack surface is a risk factor for racehorse injuries and fatalities. Current research indicates that race surface mechanical properties may be influenced by material composition, moisture content, temperature, and maintenance. Race surface mechanical testing in a controlled laboratory setting would allow for objective evaluation of dynamic properties of surface and factors that ...
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...
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...
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...
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...
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, ...
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