نتایج جستجو برای: sub level caving

تعداد نتایج: 1264833  

Journal: :Angewandte Chemie 2012
Ammu Mathew P R Sajanlal Thalappil Pradeep

Realizing the limits of sensitivity, while maintaining selectivity, is an ongoing quest. Among the multitude of requirements, national security, early detection of diseases, safety of public utilities, and radiation prevention are some of the areas in need of ultralow detection. Structural, functional, and electronic features of nanomaterials are used to develop reliable analytical methods. Sev...

This paper investigates effects of different additives on morphology and subsequently, separation performance of asymmetric flat sheet Polyvinylidene fluoride (PVDF) membranes to separate CO2 using membrane contractor. Five different additives from different chemical families including Lithium chloride (salt), Polyethylene glycol 400 (polymer), glycerol (weak anti-solvents), methanol...

1992
Mark J. Robinson John P. Oakley

The problem of accurate determination of the position, orientation and width of involute spur gear teeth using a single front-lit image is addressed. The information is used to compute global measures of tooth concentricity and pitch variations across a gear wheel. The approach is based on the use of specialised filters which make maximum use of the grey level information available in the image...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه پیام نور - دانشگاه پیام نور استان تهران - دانشکده علوم پایه 1393

مقدمه و هدف: استافیلوکوکوس اورئوس، بویژه سویه های مقاوم به متی سیلین(mrsa) یکی از مهمترین پاتوژنها در حوزه سلامت و درمان می باشد. امروزه نانوذرهzno بعنوان یکی از مواد اکسید فلزی غیرآلی است که فعالیت ضد باکتریایی فوق العاده ای از خود نشان داده است.این مطالعه به منظور بررسی اثر نانوذره اکسیدروی(zno) بر رشد و بیان ژن همولیزین آلفا استافیلوکوکوس اورئوس انجام شده است. مواد و روشها: تعداد 85 ایزوله...

Journal: :Journal of Applied Physics 2022

Accurate description of solubility and defect ionization energies in low dimensional nanostructures is critical for electronic applications semiconductors with improved functionalities. Here, we present quantum confinement effect driven strategies tuning level hydrogen doping the core region rutile [Formula: see text](R) nanowires. The inverse dependence a bandgap diameter ([Formula: text]) con...

Journal: :caspian journal of environmental sciences 2006
murugan, m.

the projected rainfall change under various scenarios is likely to have both positive and negative implications on agriculture and water supply because in rainfall pattern across the country. rise in rainfall is seen over all states except punjab, rajasthan and tamil nadu, which show slight decrease in precipitation in the future scenarios. marked increase in covering the western ghats and nort...

Journal: :Electronics Letters 2021

The multi-level feature of GeTe/Sb2Te3 interfacial phase change memory was achieved by applying a designed voltage-based pulse. It stably demonstrated five states without interference for 90 cycles varying the pulse width. retention time > 1.0 × 103 s, presenting significantly low drift coefficient (ν) < 0.009, indicating no resistivity due to structure relaxation glass. In addition, reset ener...

Journal: :IEEE Transactions on Applied Superconductivity 2022

In a dipole or in quadrupole accelerator magnet, the displacement of coil turns induced by electromagnetic forces can cause quenches limiting magnet performance. For this reason, an azimuthal preload is applied to avoid movements up required operational current. However, several tests showed that magnets operate with partial preload, i.e., unloading during ramp does not prevent reaching higher ...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه تربیت مدرس 1372

به منظور بررسی تاثیر ازت ، تراکم و دور آبیاری بر عملکرد دانه و علوفه و برخی صفات کمی و کیفی و منحنی رشد هیبرید ذرت 704 آزمایشی در سال 1371 در مزرعه آزمایشی و پژوهشی دانشکدهء کشاورزی دانشگاه تهران در شهرستان کرج با استفاده از طرح آزمایشی split-split plot بر پایه بلوکهای کامل تصادفی در چهار تکرار انجام گردید. دو سطح تراکم (a2=65000 , a1=55000)بوته در هکتار در کرتهای اصلی (main plots)، سه سطح دور ...

Journal: :Sustainability 2023

Inefficiencies in mine equipment maintenance processes result high operation costs and reduce sustainability. However, current methods for process optimization are limited due to a lack of access structured data. This research aims test the hypothesis that mining techniques can be used optimize workflow using low-level is achieved through process-oriented analysis where data processed as an eve...

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