关键词：
Image editing;Edit propagation;Deep neural network;Fully connected conditional random field
摘要：
In this paper, we regard edit propagation as a multi-class classification problem and deep neural network (DNN) is used to solve the problem. We design a shallow and fully convolutional DNN that can be trained end-to-end. To achieve this, our method uses combinations of low-level visual features, which are extracted from the input image, and spatial features, which are computed through transforming user interactions, as input of the DNN, which efficiently performs a joint learning of visual and spatial features. We then train the DNN on many of such combinations in order to build a DNN-based pixel-level classifier. Our DNN is also equipped with patch-by-patch training and whole image estimation, speeding up learning and inference. Finally, we improve classification accuracy of the DNN by employing a fully connected conditional random field. Experimental results show that our method can respond to user interactions well and generate precise results compared with the state-of-art edit propagation approaches. Furthermore, we demonstrate our method on various applications.
摘要：
The goal of this paper is to extend the modified Hestenes-Stiefel method to solve large-scale nonlinear monotone equations. The method is presented by combining the hyperplane projection method (Solodov, M.V.; Svaiter, B.F. A globally convergent inexact Newton method for systems of monotone equations, in: M. Fukushima, L. Qi (Eds.) Reformulation: Nonsmooth, Piecewise Smooth, Semismooth and Smoothing Methods, Kluwer Academic Publishers. 1998, 355-369) and the modified Hestenes-Stiefel method in Dai and Wen (Dai, Z.; Wen, F. Global convergence of a modified Hestenes-Stiefel nonlinear conjugate gradient method with Armijo line search. Numer Algor. 2012, 59, 79-93). In addition, we propose a new line search for the derivative-free method. Global convergence of the proposed method is established if the system of nonlinear equations are Lipschitz continuous and monotone. Preliminary numerical results are given to test the effectiveness of the proposed method.
摘要：
In the article, we introduce a class of n-polynomial harmonically convex functions, establish their several new Hermite-Hadamard type inequalities which are the generalizations and variants of the previously known results for harmonically convex functions.
摘要：
MXene is a novel metal compound with narrow band gap and has been widely applied in energy storage, solar energy cells, and hydrogen production. A simple technique was used to attain MXene, and then the ZnO nanorods/MXene (ZnO-MX) hybrids were fabricated by ultrasonic oscillation. Experimental results illustrated that MXene sheets were decorated by ZnO nanorods, and the resultant ZnO-MX hybrids possessed higher removal ability of Rhodamine B (RhB) than pure ZnO nanorods, in which the removal efficient was 3.2 times as fast as pure ZnO nanorods (0.0077 min(-1)) under visible light irradiation. Additionally, the photocatalytic hydrogen production of ZnO nanorods was improved by MXene sheet significantly. The enhancement was because MXene sheet increased the surface area of ZnO nanorods and reduced the resistance of transferring photo-engendered carriers, indicating that MXene sheet can serve as suitable carrier for photocatalytic materials. (C) 2019 Elsevier B.V. All rights reserved.
摘要：
In this work, a hydrosoluble matrix is used for the first time to prepare flexible membranous composites, in order to improve their environmental friendliness and simplify the processing. Modified graphene (GR) sheets are distributed in polyvinyl alcohol (PVA) solution to achieve flexible GR/PVA metacomposites. As graphene content increases, an interconnected graphene network is eventually formed among the PVA matrix, and the resulting composites present a conductor-like behavior. Interestingly, the Drude-like negative permittivity is obtained in the composites with 20 wt% graphene, which is ascribed to the plasma oscillation. Meanwhile, the absolute values of negative permittivity decrease by several orders of magnitude due to the moderate electron density of graphene. It is demonstrated that the negative permittivity is dependent on the inductive character. This work provides a novel and versatile approach based on water-soluble matrices to prepare flexible membranous metacomposites, which can be applied in wearable cloaking, thin-film capacitors, and flexible and stretchable devices.
关键词：
Chen system;memristor;four-wing hyperchaotic system;shape synchronization;secure communication
摘要：
In this paper, a simple four-wing chaotic attractor is first proposed by replacing the constant parameters of the Chen system with a periodic piecewise function. Then, a new 4D four-wing memristive hyperchaotic system is presented by adding a flux-controlled memristor with linear memductance into the proposed four-wing Chen system. The memristor mathematical structure model is simple and easy to implement. Dynamical analysis and numerical simulation of the memristive hyperchaotic system are carried out. Then, the electronic circuit of the hyperchaotic system is designed and implemented. The results of numerical simulation are in good agreement with the electronic circuit experiment. In addition, shape synchronization control for the 4D four-wing memristive hyperchaotic system is realized, and a communication system is designed by using the shape synchronization method. Finally, secure signal masking application is implemented on Matlab platform. In the developed secure communication scheme, the information signal overlaps with the chaotic masking signal, which improves the security of the system.
通讯机构：
[Qing, ZH; Yang, RH] C;Changsha Univ Sci & Technol, Hunan Prov Key Lab Mat Protect Elect Power & Tran, Hunan Prov Engn Res Ctr Food Proc Aquat Biot Reso, Sch Chem & Food Engn, Changsha 410114, Peoples R China.
摘要：
Enzyme-free amplification techniques based on dynamic DNA self-assembly (DDSA) have recently been developed for the in situ detection of mRNA in living cells. However, signal generation in traditional DDSA amplifiers is mainly dependent on the random diffusion of dissociative probes in a bulk solution, which is generally accompanied by poor kinetics and interference from complex biological systems. In this work, a new amplifier based on the design of an intramolecular catalytic hairpin assembly (intra-CHA) is proposed for the FRET imaging of mRNA in living cells. Compared with that in the free catalytic hairpin assembly (free-CHA), probes H1 and H2 in intra-CHA were simultaneously fixed on a DNA tetrahedron. The distance between them was closer, the local concentration of H1 and H2 in intra-CHA was theoretically approximately 808-times higher than that in free-CHA, and the initial reaction rate was enhanced 15.6 fold. Due to the spatial confinement effect, the reaction kinetics for target-catalyzed signal generation were significantly improved. By virtue of the three-dimensional nanostructure, H1 and H2 in the intra-CHA amplifier entered cells without any transfection or nanocarrier, and the probes and their products were free from biological interference, providing much higher signal stability for the reliable imaging of mRNA in living cells.
摘要：
<p style='text-indent:20px;'><inline-formula><tex-math id="M1">\begin{document}$ \mathbb{Z}_p\mathbb{Z}_p[v] $\end{document}</tex-math></inline-formula>-Additive cyclic codes of length <inline-formula><tex-math id="M2">\begin{document}$ (\alpha,\beta) $\end{document}</tex-math></inline-formula> can be viewed as <inline-formula><tex-math id="M3">\begin{document}$ R[x] $\end{document}</tex-math></inline-formula>-submodules of <inline-formula><tex-math id="M4">\begin{document}$ \mathbb{Z}_p[x]/(x^\alpha-1)\times R[x]/(x^\beta-1) $\end{document}</tex-math></inline-formula>, where <inline-formula><tex-math id="M5">\begin{document}$ R = \mathbb{Z}_p+v\mathbb{Z}_p $\end{document}</tex-math></inline-formula> with <inline-formula><tex-math id="M6">\begin{document}$ v^2 = v $\end{document}</tex-math></inline-formula>. In this paper, we determine the generator polynomials and the minimal generating sets of this family of codes as <inline-formula><tex-math id="M7">\begin{document}$ R[x] $\end{document}</tex-math></inline-formula>-submodules of <inline-formula><tex-math id="M8">\begin{document}$ \mathbb{Z}_p[x]/(x^\alpha-1)\times R[x]/(x^\beta-1) $\end{document}</tex-math></inline-formula>. We also determine the generator polynomials of the dual codes of <inline-formula><tex-math id="M9">\begin{document}$ \mathbb{Z}_p\mathbb{Z}_p[v] $\end{document}</tex-math></inline-formula>-additive cyclic codes. Some optimal <inline-formula><tex-math id="M10">\begin{document}$ \mathbb{Z}_p\mathbb{Z}_p[v] $\end{document}</tex-math></inline-formula>-linear codes and MDSS codes are obtained from <inline-formula><tex-math id="M11">\begin{document}$ \mathbb{Z}_p\mathbb{Z}_p[v] $\end{document}</tex-math></inline-formula>-additive cyclic codes. Moreover, we also get some quantum codes from <inline-formula><tex-math id="M12">\begin{document}$ \mathbb{Z}_p\mathbb{Z}_p[v] $\end{document}</tex-math></inline-formula>-additive cyclic codes.</p>
摘要：
By using ambient air as the oxidant and malic acid as the promoter, a practical method for the preparation of 2-aminobenzothiazoles through visible-light-initiated cascade reaction of aromatic amines and KSCN in eco-friendly bis(methoxypropy)ether under metal-, hazardous additive-, photocatalyst-free conditions was established.
