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Triangulated surface flattening based on the physical shell model
Bing-yin Shen,Yue Yang,Ran Zheng,Xiongbing Li,Minhan Yi 대한기계학회 2018 JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY Vol.32 No.5
Triangulated surface flattening plays an important role in the surface shape design of a complex product, such as a vehicle, a train and an air plane. We propose a new method of generating 2D flat patterns from a 3D triangulated surface by the physical shell model to assist in the design of the surface model. The proposed method can be divided into two primary steps: Local and global steps. In the local step, edge based spring stretching and hinge based bending model are constructed and only the local spring stretch element is projected onto the constraint manifold. In the global step, the results of individual projections are combined, and by solving a simplified global matrix, a compromise between all of the individual constraints is obtained, and the global effects are also considered. The result indicates that the proposed method can compute a flattenable mesh surface from complex 3D mesh surfaces successfully and efficiently.
Shen-Ping Xiao,Hong-Hai Lian,Hong-Bing Zeng,Gang Chen,Wei-Hua Zheng 제어·로봇·시스템학회 2017 International Journal of Control, Automation, and Vol.15 No.5
This paper investigates the robust delay-dependent passivity problem of neural networks (NNs) with time-varying delays and parameter uncertainties. A suitable augmented Lyapunov-Krasovskii functional (LKF) with triple integral term, which takes full use of the neuron activation function conditions and the information of time-delay in integral term, is constructed. Furthermore, by utilizing integral inequality proposed recently and the combining reciprocally convex method to estimate the derivative of the LKF, some less conservative robust passivity conditions are derived in terms of LMI. The superiority of presented approaches are demonstrated via two classic numerical examples.
Shen, Mei-Lin,Xu, Ling,Liu, Bing,Jiao, Huan,Kwon, Young-Uk The Royal Society of Chemistry 2018 Dalton transactions Vol.47 No.25
<P>Compound 1, [Eu(NDC)(H2O)Cl] (H2NDC = 2,6-Naphthalene dicarboxylic acid), with thermosensitive fluorescence was fabricated into composite films with polyether sulfone, and the one with 40% loading of 1 showed highly sensitive and repeatable thermal sensor properties in an alarm device.</P>
Improved Stability Criteria for Discrete-time Delay Systems via Novel Summation Inequalities
Shen-Ping Xiao,Linxing Xu,Hong-Bing Zeng,Kok Lay Teo 제어·로봇·시스템학회 2018 International Journal of Control, Automation, and Vol.16 No.4
This paper is concerned with the stability analysis of linear discrete time-delay systems. New discrete inequalities for single summation and double summation are presented to estimate summation terms in the forward difference of Lyapunov-Krasovskii functional (LKF), which are more general than some commonly used summation inequalities. Through the construction of an augmented LKF, improved delay-dependent stability criteria for discrete time-delay systems are established. Based on this, a time-delayed controller is derived for linear discrete time-delay systems. Finally, the advantages of the proposed criteria are revealed from the solutions of the numerical examples.
Overexpression of the AtSTK Gene Increases Salt, PEG and ABA Tolerance in Arabidopsis
Lei Bing,Cui-Cui Feng,Jing-Lan Li,Xiao-Xu Li,Baocun Zhao,Yin-Zhu Shen,Zhan-Jing Huang,Rong-Chao Ge 한국식물학회 2013 Journal of Plant Biology Vol.56 No.6
AtSTK (At5g02800), which is a serine-threonineprotein kinase gene of Arabidopsis thaliana, was cloned, andits function was studied. The study found that the overexpressionof AtSTK could significantly improve the ability of A. thaliana to tolerate salt, PEG, and ABA stresses. RT-PCRanalysis revealed that the expression of the AtSTK genecould be obviously induced by salt, PEG, and ABA. Theexamination of the physiological characteristics showed thatthe overexpression of AtSTK in Arabidopsis significantlyreduced the plasma membrane permeability, significantlyincreased the proline content, and decreased the MDA content. These changes may reflect the physiological mechanismsthrough which AtSTK overexpression improves stress resistancein Arabidopsis. In addition, the overexpression of the AtSTKgene significantly antagonised the inhibitory effect of highconcentrations of exogenous ABA on Arabidopsis seedgermination. The subcellular localisation results showed thatAtSTK is located in both the cytosol and the nucleus. Theexamination of its tissue-specific expression showed thatAtSTK is expressed in various Arabidopsis tissues and isparticularly strongly expressed in the vessels. The signallingpathway analysis indicated that AtSTK might transfer thesalt stress signal in Arabidopsis through the MAPK pathway.