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Copy-move Forgery Detection Robust to Various Transformation and Degradation Attacks
( Jiehang Deng ),( Jixiang Yang ),( Shaowei Weng ),( Guosheng Gu ),( Zheng Li ) 한국인터넷정보학회 2018 KSII Transactions on Internet and Information Syst Vol.12 No.9
Trying to deal with the problem of low robustness of Copy-Move Forgery Detection (CMFD) under various transformation and degradation attacks, a novel CMFD method is proposed in this paper. The main advantages of proposed work include: (1) Discrete Analytical Fourier-Mellin Transform (DAFMT) and Locality Sensitive Hashing (LSH) are combined to extract the block features and detect the potential copy-move pairs; (2) The Euclidian distance is incorporated in the pixel variance to filter out the false potential copy-move pairs in the post-verification step. In addition to extracting the effective features of an image block, the DAMFT has the properties of rotation and scale invariance. Unlike the traditional lexicographic sorting method, LSH is robust to the degradations of Gaussian noise and JEPG compression. Because most of the false copy-move pairs locate closely to each other in the spatial domain or are in the homogeneous regions, the Euclidian distance and pixel variance are employed in the post-verification step. After evaluating the proposed method by the precision-recall-F1 model quantitatively based on the Image Manipulation Dataset (IMD) and Copy-Move Hard Dataset (CMHD), our method outperforms Emam et al.’s and Li et al.’s works in the recall and F1 aspects.
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Wenzhu Dai,Jixiang He,Ling Zheng,Mingyu Bi,Fei Hu,Minju Chen,Heng Niu,Jingyu Yang,Ying Luo,Wenru Tang,Miaomiao Sheng 한국유방암학회 2019 Journal of breast cancer Vol.22 No.2
Purpose: Breast cancer is the most frequently diagnosed malignancy in women worldwide. MicroRNAs (miRNAs) are thought to serve as potential biomarkers in various cancers, including breast cancer. Methods: We evaluated the miRNA expression profiles in 1,083 breast cancer samples and 104 normal breast tissues from The Cancer Genome Atlas database. We used the edgeR package of R software to analyze the differentially expressed miRNAs in normal and cancer tissues, and screened survival-related miRNAs by Kaplan-Meier analysis. A receiver operating characteristic curve was generated to evaluate the accuracy of these miRNAs as molecular markers for breast cancer diagnosis. Furthermore, the functional role of these miRNAs was verified using cell experiments. Targets of candidate miRNAs were predicted using 9 online databases, and Gene Ontology (GO) functional annotation and pathway analyses were conducted using Database for Annotation, Visualization and Integrated Discovery online tool. Results: A total of 68 miRNAs showed significantly different expression patterns between the groups (p < 0.001), and 13 of these miRNAs were significantly associated with poor survival (p < 0.05). Three miRNAs with high specificity and sensitivity, namely, miR-148b-3p, miR-190b, and miR-429, were selected. In vitro experiments showed that the overexpression of these 3 miRNAs significantly promoted the proliferation and migration of MDA-MB-468 and T47D cells and reduced the apoptosis of T47D cells. GO and pathway enrichment analyses revealed that the targets of these dysregulated miRNAs were involved in many critical cancer-related biological processes and pathways. Conclusion: The miR-148b-3p, miR-190b, and miR-429 may serve as potential diagnostic and prognostic markers for breast cancer. This study demonstrated the roles of these 3 miRNAs in the initiation and progression of breast cancer.
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Jumping motion planning for biped robot based on hip and knee joints coordination control
Yongming Bian,Jie Shao,Jixiang Yang,Ao Liang 대한기계학회 2021 JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY Vol.35 No.3
This paper proposes a method of hip and knee joints coordination control planning based on virtual force. Firstly, the kinematic model of biped robot is established according to the physiological structure of human body. Secondly, the kinematics equation is established based on the jumping motion characteristics of the hip and knee joints, and the motion angles and angular velocities of the hip and knee joints are solved by inverse kinematics. Then, in order to optimize the motion posture, balance the driving power of the joints, and reduce the driving burden of the knee joint, a coordinated hip-knee joint control strategy and its implementation method for biped robot jumping motion are proposed based on virtual force control method. Finally, the effectiveness of the proposed method is verified by comparing and analyzing the simulation data of biped robot with the measurement data of human motion.
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Iraj Jodan,Kitirote Wantala,Nader Amini,Behzad Shahmoradi,Mona Ghaslani,이승목,Jixiang Yang,Shivaraju Harikaranahalli Puttaiah 한국화학공학회 2020 Korean Journal of Chemical Engineering Vol.37 No.9
The harmful and destructive effects of excessive consumption of thiourea in various industries and agriculture have caused health and environmental concerns. Hence, attention has been paid to the need for analysis and detection thiourea at very low concentrations. The aim of this study was to determine the efficiency of electrochemical sensor based on glass carbon electrode modified with Ag nanoparticles and alizarin yellow to detect thiourea as a pollutant. Glass carbon electrode was first modified by alizarin yellow polymer and Ag nanoparticles through electropolymerization and chronoamperometry methods, respectively. The characteristics of the modified electrode were determined through FESEM and EDAX analysis and thiourea concentration was measured through cyclic voltammetry (CV) and differential pulse voltammetry (DPV) methods. The results showed that the linear range, limit of detection, and sensitivity were 10 to 940 M, 3.3 M and 0.181 A/M, respectively. The stability and reproducibility of the sensor response as well as the interference effect of some anion species were investigated on the performance of the sensor in determining thiourea. The results indicate the optimum stability and reproducibility and no interference effect of the studied species on efficiency of the sensor in determining thiourea.
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