نتایج جستجو برای: stoping

تعداد نتایج: 94  

Journal: :Sustainability 2021

The objective is to analyze the dynamics of underground water a mine field based on study geofiltration process rock mass disturbed by mining achieve safe extraction operations as well subsurface territories at stage enterprise closure. Numerical modeling, finite difference method under conditions multifactority and definite uncertainty processes transformation technogenic environment field, he...

Journal: :مجله دانشکده پرستاری و مامایی ارومیه 0
لیلا تک فلاح l takfallah علی نجفی a najafi زینب پارسانیا z parsaniya مهری فیروزه m firoze

the investigation about continuing and effecting contraceptive in semnan     takfallah l [1] *, najafi a [2] , parsaniya z [3] , firoze m [4]     received: 26 nov, 2011 accepted: 29 jan, 2012     absteract   background & aims : nowadays a lot of works are being carried out in family planning which is also increasing however, about 8 to 30 million of unwanted pregnancy happens annually because o...

2006
N. P. Lang V. L. Han

Introduction: Channel formation is a unique puzzle in Venus' rock record. Channels, open passages believed to have transported fluid [1], occur in presumed volcanic regions [2], which together with current Venus surface conditions (~450º C [3] and ~100 bars surface pressure [4]), has led many workers, including us, to infer a volcanic origin for venusian channels, although an origin involving l...

2015
Wenjing Yin Jelena Bradic

Classical statistical theory offers validity under restricted assumptions. However, in practice, it is a common approach to perform statistical analysis based on data-driven model selection [1], which guarantees none of results of classical statistical theory. Those results include hypothesis testings and confidence intervals which are useful tools of measuring fitness of models. Considering th...

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