256 Result(s)
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Article
Qihang **n
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Article
Rac1 orientates epithelial apical polarity through effects on basolateral laminin assembly
Cellular polarization involves the generation of asymmetry along an intracellular axis. In a multicellular tissue, the asymmetry of individual cells must conform to the overlying architecture of the tissue. Ho...
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Aging blunts effects of triiodothyronine on rabbit cardiac myocytes
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Photophysical properties of dibenzofluorescein and the presence of its tautomers or prototropic forms in organic solvents
The UV/Vis absorption and fluorescence properties of dibenzofluorescein (DBFL) in organic solvents were measured and used to shed light on the possible presence of its tautomers or various prototropic forms. D...
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Fluorescence Properties of Dibenzofluorescein in Aqueous Solution
The deprotonation of dibenzofluorescein (DBFL), a long wavelength fluorescence probe, results in the simultaneous occurrence of neutral form, monoanion and dianion under physiological conditions. The fluoresce...
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Adaptive least squares support vector machines filter for hand tremor canceling in microsurgery
One of the main problems for effective control of a minimally invasive surgery (MIS) is the imprecision that caused by hand tremor. In this paper, a novel adaptive filter, the least squares support vector mach...
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Negative rectification and negative differential resistance in nanoscale single-walled carbon nanotube p-n junctions
We investigate the transport properties of few-nm-long single-walled carbon nanotube (SWCNT) p-n junctions for the first time by using ab initio quantum transport calculations. Unlike the previously reported few-...
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Open AccessTunable and sizable band gap of single-layer graphene sandwiched between hexagonal boron nitride
Opening a tunable and sizable band gap in single-layer graphene (SLG) without degrading its structural integrity and carrier mobility is a significant challenge. Using density functional theory calculations, w...
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Erratum: Tunable and sizable band gap of single-layer graphene sandwiched between hexagonal boron nitride
Correction to: NPG Asia Materials (2012) 4, e6; doi:10.1038/am.2012.10; published online 17 February 2012 Since the publication of the above article, the authors have noticed inconsistency in the references to...
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High performance silicene nanoribbon field effect transistors with current saturation
We investigate field effect transistors (FETs) based on semiconducting armchair-edged silicene nanoribbons (ASiNRs) by using ab initio quantum transport calculations. These FETs have high performance with an I ...
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Open AccessTunable and sizable band gap in silicene by surface adsorption
Opening a sizable band gap without degrading its high carrier mobility is as vital for silicene as for graphene to its application as a high-performance field effect transistor (FET). Our density functional th...
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Open AccessSub-10 nm Gate Length Graphene Transistors: Operating at Terahertz Frequencies with Current Saturation
Radio-frequency application of graphene transistors is attracting much recent attention due to the high carrier mobility of graphene. The measured intrinsic cut-off frequency (fT) of graphene transistor generally...
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Algorithm for the generation of mandrel protection curve and trajectory scheme for spinning machine
Spinning process is an effective and flexible method that has been widely employed to produce metal components having an axisymmetric rotational geometry, such as components for jet engines, turbines, radar re...
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Mitigating spectrum sensing data falsification attacks in hard-decision combining cooperative spectrum sensing
In this paper we propose a simple yet robust secure cooperative spectrum sensing scheme with hard decision combining for Opportunistic Spectrum Access (OSA) networks. Based on the historical sensing records an...
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Hidden spin polarization in inversion-symmetric bulk crystals
Spin–orbit coupling can induce spin polarization in nonmagnetic 3D crystals when the inversion symmetry is broken, as manifested by the bulk Rashba and Dresselhaus effects. We establish that these spin-polariz...
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A sparsity preserving stochastic gradient methods for sparse regression
We propose a new stochastic first-order algorithm for solving sparse regression problems. In each iteration, our algorithm utilizes a stochastic oracle of the subgradient of the objective function. Our algorit...
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An adaptive accelerated proximal gradient method and its homotopy continuation for sparse optimization
We consider optimization problems with an objective function that is the sum of two convex terms: one is smooth and given by a black-box oracle, and the other is general but with a simple, known structure. We ...
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Effect of Annealing Time on Microstructural Evolution and Deformation Characteristics in 10Mn1.5Al TRIP Steel
To investigate microstructural evolution and its effects on the deformation behaviors of cold-rolled 10Mn1.5Al TRIP steel, a series of intercritical annealing treatments with various holding times from 3 minut...
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Evaluation of the ability of black nightshade Solanum nigrum L. for phytoremediation of thallium-contaminated soil
Thallium (Tl) pollution in agricultural areas can pose hidden danger to humans, as food consumption is the key exposure pathway of Tl. Owing to the extreme toxicity of Tl, removal of Tl from soil becomes neces...
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Degradation of oxcarbazepine by UV-activated persulfate oxidation: kinetics, mechanisms, and pathways
The degradation kinetics and mechanism of the antiepileptic drug oxcarbazepine (OXC) by UV-activated persulfate oxidation were investigated in this study. Results showed that UV/persulfate (UV/PS) process appe...
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On Data Preconditioning for Regularized Loss Minimization
In this work, we study data preconditioning, a well-known and long-existing technique, for boosting the convergence of first-order methods for regularized loss minimization in machine learning. It is well unde...
