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Jin J.,Zhejiang GongShang University | Cao B.,Xinyang Vocational & Technical College | Wang X.,Zhejiang GongShang University | Wu H.,Zhejiang GongShang University | Yang B.,Zhejiang GongShang University
Xitong Fangzhen Xuebao / Journal of System Simulation | Year: 2016

Multipurpose watermarking, which has the property of both robust and semi-fragile watermarking, can realize two or more purposes in one algorithm, e.g. copyright protection and content authentication usually. It can be classified into multi-segment and single-segment watermark embedding. The latter is better in invisibility, but more challenging than the former. A multi-purpose image watermarking algorithm with single-segment watermark embedding for progressive transmission was proposed. It embedded a watermark abstracted from original image into middle and low-frequency coefficients of block DCT transform. In the watermark embedding process, the intensity of watermark could be dynamically adjusted according to the local texture and highlight intensity of the host image. In this way, the algorithm could fast perform copyright protection and locate spiteful tamper. The intensive experimental results show that our algorithm meets our expectation that copyright protection and locating spiteful tamper can be carried out at the same time. © 2016, The Editorial Board of Journal of System Simulation. All right reserved.

Sun Y.,Shenzhen Institute of Information Technology | Sun Y.,Harbin Institute of Technology | Huang S.,Xinyang Vocational & Technical College
Yadian Yu Shengguang/Piezoelectrics and Acoustooptics | Year: 2014

Static actuation characterization of the piezoelectric stack was theoretically analysis first for the design of piezoelectric stack, based on which other research work including the testing method research of the dynamic actuation characterization, the structure model analysis on the piezoelectric stack were performed. All the research work built a good foundation for the application of piezoelectric stack in the micro vibration active control system. At last, a large displacement piezoelectric stack was designed and manufactured. The theory calculation and experiment test results matched the design expectation well. It was applied in some micro vibration control system, and got a good effect in control.

Pan S.,Chengdu University of Technology | He M.,Chengdu University of Technology | Lei Z.,Xinyang Vocational & Technical College | Yuan X.,LEU
Toxicological and Environmental Chemistry | Year: 2016

The aim of this study was to examine the potential of inoculating earthworms (Pheretima sp.) in order to enhance phytoremediation of polycyclic aromatic hydrocarbons (PAH) present in soils with the use of tall fescue (Festuca arundinacea). In particular, experiments with or without inoculating earthworms for removal of pyrene was investigated. Results showed that planting of F. arundinacea enhanced the removal of pyrene at initial content over 70 days approximately 54%–80% but only 12%–24% occurred in non-planted soils. After inoculating earthworms, the dissipation rates of pyrene in planted soils were increased up to 61%–86%, which was 6%–12% higher than those in corresponding soils without inoculating earthworms. Among all possible pathways, the contribution of plant--microbial interactions on removal of pyrene was predominant, either with (46%) or without inoculating earthworms (52%), is the primary mechanism of contaminant removal. Data suggest inoculating earthworms may be a feasible way for reinforcing removal of PAH in contaminated sites. © 2016 Taylor & Francis

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