نتایج جستجو برای: نانولوله bn

تعداد نتایج: 10109  

Journal: :Nano letters 2011
Régis Decker Yang Wang Victor W Brar William Regan Hsin-Zon Tsai Qiong Wu William Gannett Alex Zettl Michael F Crommie

The use of boron nitride (BN) as a substrate for graphene nanodevices has attracted much interest since the recent report that BN greatly improves the mobility of charge carriers in graphene compared to standard SiO(2) substrates. We have explored the local microscopic properties of graphene on a BN substrate using scanning tunneling microscopy. We find that BN substrates result in extraordinar...

2001
Jie Cheng Russell Greiner

This paper investigates the methods for learning Bayesian belief network (BN) based predictive models for classification. Our primary interests are in the unrestricted Bayesian network and Bayesian multi-net based classifiers. We present our algorithms for learning these classifiers and also the methods for fighting the overfitting problem. A natural method for feature subset selection is also ...

1988
KEHE ZHU

Suppose / is a holomorphic function on the open unit ball Bn of Cn. For 1 < p < oo and to > 0 an integer, we show that / is in Lp(Bn,dV) (with dV the volume measure) iff all the functions dmf/dza (\a\ = to) are in Lp(Bn,dV). We also prove that / is in the Bloch space of Bn iff all the functions dmf/dza (\a\ = m) are bounded on Bn. The corresponding result for the little Bloch space of Bn is est...

2014
JAVIER CILLERUELO

We study the length of the gaps between consecutive members in the sumset sA when A is a pseudo s-th power sequence, with s ≥ 2. We show that, almost surely, lim sup(bn+1 − bn)/ log(bn) = sss!/Γs(1/s), where bn are the elements of sA.

2010
Robert Laskowski Peter Blaha

The atomic and electronic structure of h-BN deposited on Ru 001 , Rh 111 , and Pt 111 is discussed in terms of ab initio density functional theory. Our calculations indicate that the interaction between h-BN and the metal substrate is relatively weak for the h-BN/Pt 111 interface but rather strong for the Ru 001 and Rh 111 surfaces. The corrugations of the h-BN layer calculated for h-BN/Rh 111 ...

Journal: :Physical Review Materials 2023

Wurtzite Boron Nitride ($w$BN) is a wide band gap BN polymorph with peculiar mechanical properties (hardness and stiffness). After its first synthesis in 1963 as transformation of hexagonal ($h$BN) under high temperature pressure conditions, lot progress have been made order to stabilize wurtzite phase at atmospheric pressure. Today the crystallization good quality samples finally possible. Thi...

Journal: :Physical review letters 2001
E Bengu L D Marks

We describe in situ synthesis and characterization of single-walled BN nanotubes terminated by fullerenelike structures using electron-cyclotron resonance nitrogen and electron beam boron sources onto polycrystalline tungsten substrates. Detailed comparisons of experimental high-resolution electron microscopy images and simulations based upon molecular models show a dominance of kinks and bends...

2016
Emilio Del Moral Hernandez Geehyuk Lee Nabil H. Farhat

An increasing number of applications of a one-dimensional (1-D) map as an information processing element are found in the literature on artificial neural networks, image processing systems, and secure communication systems. In search of an efficient hardware implementation of a 1-D map, we discovered that the bifurcating neuron (BN), which was introduced elsewhere as a mathematical model of a b...

Journal: :American journal of physiology. Heart and circulatory physiology 2010
Mary Osborne-Pellegrin Carlos Labat Nathalie Mercier Pascal Challande Patrick Lacolley

Adult Brown Norway (BN) rats exhibit numerous internal elastic lamina (IEL) ruptures in the abdominal aorta (AA) and a lower aortic elastin-to-collagen ratio (E/C) compared with other strains. We studied here AA mechanical properties in BN compared with control strains. AA stiffness (assessed by plotting elastic modulus/wall-stress curves obtained under anesthesia), thoracic aorta elastin and c...

2010
Sungjin Chung Jae Ho Lee Yejee Lim Hae Kyung Yang Yoon Sik Chang

prompt decrease in BP. In three subjects, hypotension occurred after BN (BP <120/70 mmHg), and intradialytic ultrafiltration had to be decreased. Five patients required continuation of one antihypertensive drug. While in our centre, antihypertensive therapy was more intense during the last years of the study with 5.8 (5–6) daily antihypertensive agents compared with only 4.4 (4–5) in the years ...

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