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An Adaptive Watermark Detection Algorithm for Vector Geographic Data
( Yingying Wang ),( Chengsong Yang ),( Na Ren ),( Changqing Zhu ),( Ting Rui ),( And Dong Wang ) 한국인터넷정보학회 2020 KSII Transactions on Internet and Information Syst Vol.14 No.1
With the rapid development of computer and communication techniques, copyright protection of vector geographic data has attracted considerable research attention because of the high cost of such data. A novel adaptive watermark detection algorithm is proposed for vector geographic data that can be used to qualitatively analyze the robustness of watermarks against data addition attacks. First, a watermark was embedded into the vertex coordinates based on coordinate mapping and quantization. Second, the adaptive watermark detection model, which is capable of calculating the detection threshold, false positive error (FPE) and false negative error (FNE), was established, and the characteristics of the adaptive watermark detection algorithm were analyzed. Finally, experiments were conducted on several real-world vector maps to show the usability and robustness of the proposed algorithm.
A Study on the Development Plan of Chinese Manufacturing Industry under RCEP
Qin Yingying,Dong Xiao Ran 한중경제문화학회 2023 한중경제문화연구 Vol.24 No.-
The signing and implementation of RCEP mark the birth of a highly promising free trade zone. This agreement not only promotes the liberalization of regional trade and investment, creating an integrated regional market but also drives regional economic growth, supporting the stability and prosperity of the East Asian economic sphere. Simultaneously, it contributes to global economic recovery.The implementation of RCEP brings new development opportunities to China’s manufacturing industry but also imposes higher standards, stricter rules, and intensified competition. Chinese manufacturing will face more challenges. This article analyzes the opportunities and challenges brought by RCEP to China and proposes policy suggestions to promote the development of China’s manufacturing industry, including strengthening cooperation with RCEP countries, enhancing technological innovation capabilities, and prioritizing the development of the workforce.
Yu Dong,Liqin Liu,Yingying Zhang,Junfeng Guan 한국원예학회 2014 Horticulture, Environment, and Biotechnology Vol.55 No.5
‘Jingbaili’ pear (Pyrus ussuriensis Maxim.) fruit shows rapid softening, yellowing and short shelf-life atambient temperature storage. In this study, ‘Jingbaili’ pear fruits were treated with 1.0 μL·L-1 1-methylcyclopropene(1-MCP) for 24 hours at 25 ± 2°C and then stored at 0°C. After 60 and 120 days of cold storage at 0°C, pearfruits were removed and stored at 20 ± 2°C to assess their shelf-life. The results indicated that the 1-MCP treatmentdelayed the decrease in firmness and chlorophyll (a, b, and a+b) content of peel, reduced the rates of respiration andethylene production, and inhibited the accumulation of hydrogen peroxide (H2O2), which was observed in the untreatedfruits during and after cold storage. Less difference was found in soluble solids content (SSC) between the controland 1-MCP-treated fruits during storage. The correlation analysis showed that flesh H2O2 content was negativelyrelated to firmness and also peel H2O2 content to peel chlorophyll a+b content. These results suggested that the1-MCP treatment could delay the fruit softening and chlorophyll degradation by suppressing the accumulation ofH2O2 content during and after cold storage in ‘Jingbaili’ pear.
Li Zhang,Dong Li,Min Lu,Zechi Wu,Chaotian Liu,Yingying Shi,Mengyu Zhang,Zhangjie Nan,Weixiang Wang 한국식물병리학회 2023 Plant Pathology Journal Vol.39 No.4
In plant-pathogen interactions, Magnaporthe oryzae causes blast disease on more than 50 species of 14 monocot plants, including important crops such as rice, millet, and most 15 recently wheat. M. oryzae is a model fungus for studying plant-microbe interaction, and the main source for fungal pathogenesis in the field. Here we report that MoJMJD6 is required for conidium germination and appressorium formation in M. oryzae. We obtained MoJMJD6 mutants (ΔMojmjd6) using a target gene replacement strategy. The MoJMD6 deletion mutants were delayed for conidium germination, glycogen, and lipid droplets utilization and consequently had decreased virulence. In the ΔMojmjd6 null mutants, global histone methyltransferase modifications (H3K- 4me3, H3K9me3, H3K27me3, and H3K36me2/3) of the genome were unaffected. Taken together, our results indicated that MoJMJD6 function as a nuclear protein which plays an important role in conidium germination and appressorium formation in the M. oryzae. Our work provides insights into MoJMJD6-mediated regulation in the early stage of pathogenesis in plant fungi.
Guangshuo Wang,Yingying Ma,Yu Tong,Xufeng Dong 한국공업화학회 2017 Journal of Industrial and Engineering Chemistry Vol.48 No.-
Novel nanocomposites consisting of manganese ferrite nanoparticles and graphene oxide nanosheets(MnFe2O4/GO) have been synthesized as a promising candidate for magnetorheological (MR)fluid. Themorphology, microstructure, composition and magnetic properties of the obtained MnFe2O4/GO werestudied in detail. It was found that the MnFe2O4 nanoparticles with diameter of 8–12 nm were denselydecorated on the surface of GO nanosheets. The magnetization investigation revealed that as-preparedMnFe2O4/GO had superparamagnetic behavior with saturation magnetization of 36.2 emu/g. The MRfluid was prepared by the obtained MnFe2O4/GO and the corresponding MR properties were investigatedusing a Physica MCR301 rheometerfitted with a magneto-rheological module. The MnFe2O4/GO-basedMRfluid exhibited typical MR effect with increasing shear stress, yield stress and dynamic shear modulusdepending on magneticfields. More importantly, the sedimentation stability of the prepared MRfluidwas found to be improved due to the unique sheet-like structure and the reduced density mismatchbetween the dispersed particles and the carrier medium. The MnFe2O4/GO-basedfluid with typical MReffect and excellent sedimentation stability would provide a feasible candidate for practical applications
Ryu, Jae Seop,Yao, Yingying,Koh, Chang Seop,Yun, Sonam,Kim, Dong Soo IEEE 2005 IEEE transactions on magnetics Vol.41 No.5
A three-dimensional (3-D) shape optimization algorithm is developed by combining the geometric parameterization of the design surface using spline technique and design sensitivity analysis. The design surface is parameterized using Bezier spline or B-spline, and the control points of the spline are taken as the design variables. Considering nonlinearity of the material, the design sensitivities for the nodal points on the design surface and the adjoint variable are computed based on 3-D nonlinear finite-element method. The parameterized design sensitivities for the control points of the spline are computed from those for the nodal points. Through a numerical implementation, the developed algorithm is proved to guarantee a smooth design surface.
Guangshuo Wang,Fei Zhou,Ziwei Lu,Yingying Ma,Xiaoguang Li,Yu Tong,Xufeng Dong 한국공업화학회 2019 Journal of Industrial and Engineering Chemistry Vol.70 No.-
In this study, we reported novel nanocomposites containing cobalt ferrite (CoFe2O4) nanoparticles andmolybdenum disulfide (MoS2) nanosheets (CoFe2O4/MoS2). The obtained CoFe2O4/MoS2 as dispersedphase was used to prepare magnetorheological (MR)fluid and the rheological properties wereinvestigated in detail. The results of transmission electron microscopy showed that the CoFe2O4nanoparticles were homogeneoused decorated on the surface of MoS2 nanosheets. The successfulpreparation of CoFe2O4/MoS2 was further confirmed by X-ray diffraction, X-ray photoelectronspectroscopy, Raman spectroscopy and vibrating sample magnetometer. The CoFe2O4/MoS2 based MRfluid exhibited typical MR effect with increasing viscosity, shear stress, yield stress and dynamic shearmoduli depending on external magneticfields. More importantly, the preparedfluid showed excellentsedimentation stability due to unique two-dimensional structure and reducedfluid-particle densitymismatch.