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Search Results: 1 - 10 of 37294 matches for " Hua Ji "
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Geometrical study on diseaserelated ncRNAs based on Z-curve method  [PDF]
Yan-Ling Yang, Ji-Hua Wang
Health (Health) , 2009, DOI: 10.4236/health.2009.11005
Abstract: The Z curve is a very useful method for visual-izing and analyzing DNA sequences. It is a three-dimensional space curve that constitutes a unique representation of a given DNA se-quence. It becomes more and more important to study non-coding regions in the recent years. Using Z curve method, 15 disease-related ncRNAs and some snoRNAs and miRNAs sequences are selected from the NONCODE database in this paper, which relate to Alzheimer Disease. The corresponding Z curves of the studied ncRNAs, sequences have been mapped and compared. The statistical features of the Z curves are ob-tained. These features indicate that the ncRNAs sequences playing same roles in the celluar process have almost the same Z-curves. And the base content in these sequences is almost same too.
Folding rate prediction using complex network analysis for proteins with two- and three-state folding kinetics  [PDF]
Hai-Yan Li, Ji-Hua Wang
Journal of Biomedical Science and Engineering (JBiSE) , 2009, DOI: 10.4236/jbise.2009.28094
Abstract: It is a challenging task to investigate the different in- fluence of long-range and short-range interactions on two-state and three-state folding kinetics of protein. The networks of the 30 two-state proteins and 15 three-state proteins were constructed by complex networks analysis at three length scales: Protein Contact Networks, Long-range Interaction Networks and Short-range Interaction Networks. To uncover the relationship between structural properties and folding kinetics of the proteins, the correlations of protein network parameters with protein folding rate and topology parameters contact order were analyzed. The results show that Protein Contact Networks and Short-range Interaction Networks (for both two-state and three-state proteins) exhibit the “small-world” property and Long-range Interaction networks indicate “scale-free” behavior. Our results further indicate that all Protein Contact Networks and Short- range Interaction networks are assortative type. While some of Long-range Interaction Networks are of assortative type, the others are of disassortative type. For two-state proteins, the clustering coefficients of Short-range Interaction Networks show prominent correlation with folding rate and contact order. The assortativity coefficients of Short-range Interaction Networks also show remarkable correlation with folding rate and contact order. Similar correlations exist in Protein Contact Networks of three-state proteins. For two-state proteins, the correlation between contact order and folding rate is determined by the numbers of local contacts. Short- range interactions play a key role in determining the connecting trend among amino acids and they impact the folding rate of two-state proteins directly. For three-state proteins, the folding rate is determined by short-range and long-range interactions among residues together.
Artificial Noise Based Security Algorithm for Multi-User MIMO System  [PDF]
Jian-hua Peng, Kai-zhi Huang, Jiang Ji
Communications and Network (CN) , 2013, DOI: 10.4236/cn.2013.53B2037
Abstract: The existing physical layer security algorithm, which is based on artificial noise, could affect legitimate receivers negatively when the number of users is no less than sending antennas in multi-user MIMO system. In order to improve security of multi-user MIMO system under this scenario, we propose a new multi-user MIMO system physical layer security algorithm based on joint channel state matrix. Firstly, multiple users are processed together, thus a multi-user joint channel state matrix is established. After achieving Singular Value Decomposition (SVD) of the joint channel state matrix, the minimum singular value is obtained, which can be utilized for precoding to eliminate the interference of artificial noise to legitimate receivers. Further, we also present an approach to optimize the power allocation. Simulation results show that the proposed algorithm can increase secrecy capacity by 0.1 bit/s/HZ averagely.
Analysis on the Nutrition Composition and Antioxidant Activity of Different Types of Sweet Potato Cultivars  [PDF]
Hua Ji, Haixin Zhang, Hongtao Li, Yunchao Li
Food and Nutrition Sciences (FNS) , 2015, DOI: 10.4236/fns.2015.61017
Abstract: In this study, we selected four different color fleshed sweet potatoes, purple- (Jizi 01), red- (Xinong 431), yellow- (Beijing 553) and white- (Shangshu 19) fleshed cultivars as test materials, analyzed nutrient composition, dietary fiber content, anthocyanins quantification, and total phenolics content, and also measured their total antioxidant activity in four different types of sweet potato. In view of differences in flesh color, the nutrient contents of different cultivars appeared to be significantly different. Starch contents of Beijing 553 and Shangshu 19 were higher, but fat contents were lower than others. Protein content of Shangshu 19 was the highest followed by Jizi 01 and Xinong 431. In addition, our analysis results confirmed that purple fleshed sweet potato possesses much higher anthocyanins content than others, even up to 6.23 mg/g dry matter. Also, dietary fiber, total phenolics content, and total antioxidant capacity of Jizi 01 were significantly higher.
A novel method to identify the scaling region for chaotic time series correlation dimension calculation
CuiCui Ji,Hua Zhu,Wei Jiang
Chinese Science Bulletin , 2011, DOI: 10.1007/s11434-010-4180-6
Abstract: To obtain more accurate correlation dimension estimations for chaotic time series, a novel scaling region identification method is developed. First, points that obviously do not belong to the scaling region associated with the whole double logarithm correlation integral curve are removed using the K-means algorithm. Second, a point-slope-error algorithm is developed to recognize a possible scaling region. Third, the K-means algorithm is used again to further remove a small interval of interfering points in the possible scaling region to obtain a more precise scaling region. The correlation dimension of four typical chaotic attractors and five curves generated by the Weierstrass-Mandelbrot fractal function were calculated using the proposed method. These calculated values were very close to the respective theoretical fractal dimensions. Moreover, the effectiveness of our method in identifying the scaling region was compared with existing methods. Results show that our method can distinguish the scaling region objectively, accurately, automatically and quickly, making estimations of the correlation dimension more precise and affording significant improvements in nonlinear analysis.
Influences of an external pulse on the quantum state of a mesoscopic RLC circuit
脉冲信号对介观RLC电路量子态的影响

Ji Ying-Hua,
嵇英华

物理学报 , 2003,
Abstract: In this paper, the influences of an external pulse on the variation of the quantum state of a mesoscopic RLC circuit are investigated emphatically. Our research result indicates that the transition probabilities of the variation of the quantum state are adjusted by controlling the variation of the pulse parameters when the parameters of the mesoscopic circuit are constant. We point out that the quantum state of a system is stable when the width of the pulse is equal to the integral times of the minimum fixed value. The minimum fixed value is not related to the altitude of pulse but the circuit parameters. The larger the resistance, the wider the minimum fixed width of the external pulse.
Preparation of squeezed even coherence state and its nonclassical properties
压缩偶相干态的制备及其非经典特性

Ji Ying-Hua,
嵇英华

物理学报 , 2003,
Abstract: By keeping the frequency of non-dissipative mesoscopic LC circuit a constant and its parameter varying with the step function, the quantum state of the circuit evolves to a squeezed even coherent state from the initial even coherent state. The nonclassical properties, not only squeezing but also antibunching effects, appear in the circuit by adjusting its inductor parameter under the squeezed even coherent state.
Controlled decoherence of floating flux qubits

Ji Ying-Hua,Xu Lin,

中国物理 B , 2010,
Abstract:
A Research on Dynamic Friction Compensation of High-speed Linear motor
Xuan Cui,Yuan Ji,Hua Sun
TELKOMNIKA : Indonesian Journal of Electrical Engineering , 2012, DOI: 10.11591/telkomnika.v10i8.1645
Abstract: The tracing precision of high-precise linear motor is greatly influenced when moved at a low speed because of the friction. This paper aims at a practical angle, on the base of traditional Stribeck friction model, we added in position parameter to set up a new model .According to the new model, we designed out the forward back controller to identificate and compensate the system. at last, the stability of systems has also been analyzed by using Liapunov functions and LaSalle Invariance Principle.The simulation results shows our model has improved the tracing performance.
Distribution pattern of traditional Chinese medicine syndromes in 793 patients with fatty liver disease
Hua-feng WEI,Guang JI
Zhong Xi Yi Jie He Xue Bao , 2009,
Abstract: Objective: To study the distribution pattern of traditional Chinese medicine (TCM) syndromes in fatty liver disease.Methods: A multicenter and large sample survey was carried out by adopting the model of “combining disease with syndrome”. A TCM syndrome information database was established by EPidata 3.1 software. The distribution pattern of TCM syndromes in fatty liver was studied by factor analysis and cluster analysis methods with SPSS 13.0 software.Results: The basic syndromes of fatty liver included insufficiency of liver and kidney, flaring fire due to yin deficiency, liver-qi stagnation and spleen deficiency, spleen deficiency, spleen deficiency and dampness stagnation, mild syndrome of internal accumulation of damp-heat, blood stasis, severe syndrome of internal accumulation of damp-heat, and internal stagnation of phlegm-dampness. Single syndrome and combination of two to four basic syndromes were common in fatty liver disease. The syndrome of spleen deficiency and dampness stagnation was the most frequent one when its pathogenesis was simple, while the syndrome of insufficiency of liver and kidney was most frequent one when the pathogenesis was complicated. A total of 108 patients (13.6%) had no obvious symptoms, 46 patients (5.8%) were classified into the pattern of non-categorization, and the other patients were classified into five syndromes including phlegm accumulating with stagnation due to spleen deficiency (11.5%, 91/793), yin deficiency of liver and kidney (18.5%, 147/793), retention of phlegmatic dampness due to spleen deficiency (32.0%, 254/793), internal accumulation of damp-heat due to spleen deficiency (10.2%, 81/793), and damp obstruction due to liver-qi stagnation and spleen deficiency (8.3%, 66/793).Conclusion: Multi-element analysis reveals the distribution pattern of TCM syndromes in fatty liver disease, which is worthy of further study. The basic pathogenesis is spleen deficiency, and has a close correlation with the liver and kidney. The main pathogenesis factors are phlegm, dampness, blood stasis, heat and liver-qi stagnation. Yin deficiency of liver and kidney is a typical syndrome in fatty liver disease.
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