نتایج جستجو برای: شاخص mbe

تعداد نتایج: 76393  

Journal: :British Dental Journal 2021

شوری خاک ازجمله مخاطرات محیطی بالقوه محسوب می ­شود. هدف از این تحقیق یافتن بهترین شاخص و مناسب ­ترین رابطه جهت برآورد شوری خاک و تهیه نقشه آن با استفاده از داده­ های دورسنجی است. بدین منظور ابتدا نمونه ­برداری تصادفی با استفاده از روش تور ماهی و اندازه ­گیری هدایت الکتریکی خاک سطحی (EC) انجام شد. سپس سطوح حد آستانه (92%، 95% و 98%) روی تصاویر خروجی هر شاخص اعمال شد. از روش‌های کمترین مربعات رگر...

Journal: :Physical review research 2022

Canonical discrete quantum error correction (DQEC) schemes use projective von Neumann measurements on stabilizers to discretize the syndromes into a finite set, and fast unitary gates are applied recover corrupted information. Quantum (QEC) based continuous measurement, known as (CQEC), in principle, can be executed faster than DQEC also resource efficient. However, CQEC requires meticulous fil...

2007
Masamitu Takahasi

The molecular beam epitaxial (MBE) growth and postgrowth annealing of InAs/GaAs(001) quantum dots were investigated by grazing-incidence X-ray diffraction using a diffractometer integrated with an MBE apparatus. The use of synchrotron radiation and a two-dimensional X-ray detector enabled X-ray diffraction measurements on the internal strains and height of dots at a rate of less than 10 s per f...

1999
S. H. Li S. W. Chung

Gas-source molecular-beam epitaxy (MBE) has been used to grow SiGe alloys with S&H6 and GeH4 as sources on (100) Si substrates. Single-crystalline epilayers with Ge composition as high as 33% have been produced at 610 “C, the lowest temperature hitherto used for gas-source SiGe MBE. Growth parameters, growth modes, and the structural characteristics have been studied by a variety of in situ and...

Journal: :Semiconductor Science and Technology 2021

Three different elements, Silicon, Selenium, and Tellurium, are ion-implanted in Gallium arsenide to form a conducting layer that serves as back-gate molecular beam epitaxy (MBE) overgrown two-dimensional electron gas (2DEG). While the heavy ion Tellurium creates too many damages gallium layer, both Silicon Selenium show promising results combined with MBE-grown high-quality 2DEGs. Similar 2DEG...

2011
Benoît Moury

The dN/dS ratio between nonsynonymous and synonymous substitution rates has been used extensively to identify codon positions involved in adaptive processes. However, the accuracy of this approach has been questioned and very few studies have attempted to validate experimentally its predictions. Using the coat protein (CP) of Potato virus Y (PVY; genus Potyvirus, family Potyviridae) as a case s...

2007
Jen-Wei Kuo Hung-Yi Lo Hsin-Min Wang

This paper presents improved HMM/SVM methods for a twostage phoneme segmentation framework, which tries to imitate the human phoneme segmentation process. The first stage performs hidden Markov model (HMM) forced alignment according to the minimum boundary error (MBE) criterion. The objective is to align a phoneme sequence of a speech utterance with its acoustic signal counterpart based on MBE-...

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