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Study on Effect of Massage Technique based on Chaos Theory
Ping Feng,Xiao-li Wang,Chao Zhang,Wei Sun,Dai-min Chen 보안공학연구지원센터 2016 International Journal of u- and e- Service, Scienc Vol.9 No.12
According to the mechanism of EMG signal, we know that the sacrificial electrical signal is with weak signal, low frequency, alternating, nonlinear and non-stationary characteristics. Nonlinear analysis includes higher order spectral analysis and fractal and chaos analysis.Chaos theory is one of the main parts of nonlinear science, and the electrical signal of the surface has a strong randomness, so we could consider the nonlinear analysis of EMG signals from the perspective of chaos. We mainly studied on the nonlinear analysis algorithm of EMG signal detailedly in this paper. Experiments show that,according to the quantitative analysis of several important parameters of rolling massage with chaos theory, we can measure objectively the action situation of related muscle groups in the operation course, then guide the professional massage students to understand the norms of operation in training of operation and help to lead their manipulation to the best power structure.
Blind Watermarking Scheme based on U matrix Through QSVD Transformation
Feng Liu,Hao Feng,Chao Lu 보안공학연구지원센터 2015 International Journal of Security and Its Applicat Vol.9 No.4
In this paper, a novel blind color image watermarking technique using U matrix through QSVD transformation is proposed to protect the intellectual property rights of color images. The proposed method tries to insert the watermark through moderating the coefficient of the quaternion elements in U matrix. .In this method, the color image is considered as an array of pure quaternion numbers. Then the array of pure quaternion is divided into non-overlapping blocks and we perform QSVD to the block to get the U matrix. The watermarking is inserted into the coefficient of the quaternion elements in the first column of the U matrix. Besides, in the procedure of watermark insertion and extraction, ensuring higher fidelity and robustness and resilience to several possible image attacks have been considered. The experimental results showed that the proposed method performance created watermarked images with better PSNRs and more robustness versus several attacks such as Salt &Pepper noise, Brightness adjustment, Sharpen and Blurring and Clipping.
( Chao Wei Huang ),( Ko Chiao Yen ),( Chao Feng Yu ),( Ying Chen Lu ) 한국농업기계학회 2018 한국농업기계학회 학술발표논문집 Vol.23 No.1
Many Gram-positive bacteria, particularly lactic acid bacteria, are known to secrete proteins that have antimicrobial activity. These proteins, known as bacteriocins, have been shown to display inhibitory activity against many pathogens. Use lactic acid bacteria fermented herb has many advantages, such as increase the extraction rate of herb, produce new active compounds, reduce waste etc. In this study, 270 strains of lactic acid bacteria were screened for bacteriocin producing ability, and Lactobacillus gasseri LYC400 was found to have highest bacteriocin activity. Lactobacillus gasseri LYC400 was used to ferment MRS broth with various concentration, 0, 2, 4, 6%, respectively, wild bitter melon (Momordica charantia Linn. var. abbreviata Ser.) powder. The fermentation broths were centrifuged and the supernatants were collected follow by protein extraction to analyze bacteriocin activity. The results showed wild bitter melon powder was able to support good growth of the lactic acid bacterium. The bacterial number, lactic acid concentration and the E. coli inhibition ability of protein extractions were positive correlated with bitter melon powder concentration. However, the Staphylococcus aureus inhibition ability of protein extractions were increased with 2, 4% bitter melon powder but decreased at 6% bitter melon powder. Fermentation wild bitter melon via Lactobacillus gasseri LYC400 increases its antibacterial activity with putative anti-diabetic activities may have great potential for health food.
Free vibration of orthotropic functionally graded beams with various end conditions
Chao-Feng Lü,W. Q. Chen 국제구조공학회 2005 Structural Engineering and Mechanics, An Int'l Jou Vol.20 No.4
Free vibration of orthotropic functionally graded beams, whose material properties can vary arbitrarily along the thickness direction, is investigated based on the two-dimensional theory of elasticity. A hybrid state space/differential quadrature method is employed along with an approximate laminate model, which allows us to obtain the semi-analytical solution easily. With the introduction of continuity conditions at each fictitious interface and boundary conditions at the top and bottom surfaces, the frequency equation for an inhomogeneous beam is derived. A completely exact solution of an FGM beam with material constants varying in exponential way through the thickness is also presented, which serves a benchmark to verify the present method. Numerical results are performed and discussed.
Feng Ye,Yanpeng Cao,Weiwei Han,Yakun Yang,Yuancheng Feng,Peng Liu,Chao Xu,Xiaoze Du,양우철,Liu Guicheng 한국화학공학회 2022 Korean Journal of Chemical Engineering Vol.39 No.3
A highly active RuO2IrO2 electrocatalyst was developed via dip-coating/calcination method for oxygen evolution reaction (OER). The catalyst on Ti substrate with a 7/3 molar ratio between Ru and Ir showed the highest electrocatalytic activity for OER among composite samples in different molar ratios. Moreover, the properties of RuO2IrO2 grown on carbon paper were evaluated by proton exchange membrane water electrolysis single cell. Compared with the micron-particle structure of RuO2IrO2 catalyst on the Ti substrate, the catalyst grown on the carbon paper showed a novel nano dendrite shape and can be used directly as the gas diffusion electrode. Owing to the large surface area of the catalyst, the nano dendrite-shaped RuO2IrO2 catalyst exhibits excellent OER performance in the single cell. Furthermore, a cell voltage of 2.50 V is achieved under 200mA cm2 at 30 oC by using the optimal composition RuO2IrO2 (Ru : Ir=7/3) and the commercial 20% Pt/C as anode and cathode, respectively.
Feng, Chao,Song, Ruixi,Sun, Guohui,Kong, Ming,Bao, Zixian,Li, Yang,Cheng, Xiaojie,Cha, Dongsu,Park, Hyunjin,Chen, Xiguang American Chemical Society 2014 Biomacromolecules Vol.15 No.3
<P>We have designed and evaluated coacervate microcapsules-immobilized multilayer sodium alginate beads (CMs-M-ALG-Beads) for oral drug delivery. The CMs-M-ALG-Beads were prepared by immobilization of doxorubicin hydrochloride (DOX) loaded chitosan/carboxymethyl coacervate microcapsules (DOX:CS/CMCS-CMs) in the core and layers of the multilayer sodium alginate beads. The obtained CMs-M-ALG-beads exhibited layer-by-layer structure and rough surface with many nanoscale particles. The swelling characteristic and drug release results indicated that 4-layer CMs-M-ALG-Beads possessed favorable gastric acid tolerance (the swelling rate <5%, the cumulative drug release rate <3.8%). In small intestine, the intact DOX:CS/CMCS-CMs were able to rapidly release from CMs-M-ALG-Beads with the dissolution of ALG matrix. Ex vivo intestinal mucoadhesive and permeation showed that CMs-M-ALG-Beads exhibited continued growth for <I>P</I><SUB>app</SUB> values of DOX, which was 1.07–1.15 folds and 1.28–1.38 folds higher than DOX:CS:CMCS-CMs in rat jejunum and ileum, respectively, demonstrating that CMs-M-ALG-Beads were able to enhance the absorption of DOX by controlled releasing DOX:CS/CMCS-CMs and prolonging the contact time between the DOX:CS/CMCS-CMs and small intestinal mucosa.</P><P><B>Graphic Abstract</B> <IMG SRC='http://pubs.acs.org/appl/literatum/publisher/achs/journals/content/bomaf6/2014/bomaf6.2014.15.issue-3/bm401890x/production/images/medium/bm-2013-01890x_0010.gif'></P><P><A href='http://pubs.acs.org/doi/suppl/10.1021/bm401890x'>ACS Electronic Supporting Info</A></P>