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Search Results: 1 - 10 of 33456 matches for " Ying Fan "
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The Development of Network based Composite Power quality Regulation Device  [PDF]
Weiqiang Fan, Ying Lei, Jing Zhu, Luo Li, Shuai Niu
Energy and Power Engineering (EPE) , 2013, DOI: 10.4236/epe.2013.54B230
Abstract: First, the paper analyzes the advantages and disadvantages of all kinds of reactive power compensation technology, and then proposes a principle and integrated control strategy of the composite operation of TSC and SVG, also the paper designs and develops the main controller of Network based composite power quality regulation device, based on RTDS, the real-time digital simulation model of The Device is established, and finally the prototype of the device is developed with the function of filter and split-phase compensation. The main controller determines the cooperative operation of both TSC and SVG, and the switching strategy of TSC. The simulation result in RTDS can verify the precision of the measure system and the validity of the control logic, the prototype has finished the type test according to the national standard.
Anomalous Origin of Left Coronary Artery from the Pulmonary Trunk in a Mildly Symptomatic Adult Female
Kevin Fan-Ying Tseng
Case Reports in Surgery , 2013, DOI: 10.1155/2013/840741
Abstract: Anomalous origin of the left coronary artery from the pulmonary trunk, also known as Garland-Bland-White syndrome, is an extremely rare but potentially fatal congenital cardiovascular anomaly, and it often exists as an isolated condition. We hereby report an adult female who was admitted for mild chest discomfort and was accidentally diagnosed to have anomalous origin of the left coronary artery from the pulmonary trunk. This anomaly was simply repaired by using a bovine pericardial patch to obliterate the anomalous opening in the pulmonary trunk and a single coronary artery bypass graft. This report highlights the characteristic events of the anomaly in an adult with only mild symptoms. 1. Introduction Anomalous origin of the left coronary artery from the pulmonary trunk, also known as Garland-Bland-White syndrome, is an extremely rare but potentially fatal congenital cardiovascular anomaly, and it often exists as an isolated condition. Some reports have found its association with tetralogy of Fallot (TOF), complete atrioventricular septal defect, and aortopulmonary (AP) window, which arises secondary to failure of septation in the aorticopulmonary trunk [1–10]. 2. Case Report The patient is a 36-year-old female school teacher who was in her normal state of health until two years prior to the present admission when the patient started to feel occasional pressure-like chest discomfort and palpitation. The patient went to a local hospital for help. Mild mitral regurgitation was told, and the patient was then discharged with medical management as an outpatient. However, one month prior to the present admission, the patient’s chest tightness, although still mild on onset, had increased in frequency. The patient went back to the same hospital for further evaluation. This time, a cardiac catheterization was performed and accidentally revealed anomalous drainage of left coronary artery (LCA), including all its branches (like the left anterior descending artery, left circumflex artery, and the left diagonal artery), into the main pulmonary artery. Single right coronary artery (RCA) originated from the aorta, and mild mitral regurgitation was seen concurrently in the cardiac catheterization. Upon recommendations from the patient’s family, the patient came to our hospital and was admitted for surgical managements. After the patient was admitted into our service, chest X-ray, ECG, carotid ultrasound, pulmonary function test, pressure volume recording, blood analysis, and viral check were done and all revealed normal findings. No fever, leukocytosis, or any sign
Comment on "Dynamics and Directionality in Complex Networks"
An Zeng,Ying Fan,Zengru Di
Physics , 2010,
Abstract: Authors of Phys. Rev. Lett. 103, 228702 (2009) claim that "The residual degree gradient (RDG) method can enhance thesynchronizability of networks by simply changing the direction of the links". In this paper, we argue that in some case the RDG method will lead to the failure of synchronization ($R=\lambda^{r}_{2}/\lambda^{r}_{N}=0$). Additionally, we also propose a so-called residual betweenness gradient (RBG) method to solve this problem.
Computational Analysis of Mixing Guide Vane Effects on Performance of the Supersonic Ejector-Diffuser System  [PDF]
Fan Shi Kong, Heuy Dong Kim, Ying Zi Jin, Toshiaki Setoguchi
Open Journal of Fluid Dynamics (OJFD) , 2012, DOI: 10.4236/ojfd.2012.23005
Abstract: The flow field in the ejector-diffuser system and its optimal operation condition are hardly complicated due to the complicated turbulent mixing, compressibility effects and even flow unsteadiness which are generated inside the ejector- diffuser system. This paper aims at the improvement in ejector-diffuser system by focusing attention on entrainment ratio and pressure recovery. Several mixing guide vanes were installed at the inlet of the secondary stream for the purpose of the performance improvement of the ejector system. A Computational Fluid Dynamics (CFD) method based on Fluent has been applied to simulate the supersonic flows and shock waves inside the ejector. A finite volume scheme and density-based solver with coupled scheme were applied in the computational process. Standard k-ω turbulent model, implicit formulations were used considering the accuracy and stability. Previous experimental results showed that more flow vortexes were generated and more vertical flow was introduced into the stream under a mixing guide vane influence. Besides these effects on the secondary stream, the mixing guide vane effects on the shock system of the primary stream were also investigated in this paper. Optimal analysis results of the mixing guide vane effects were also carried out in detail in terms of the positions, lengths and numbers to achieve the best operation condition. The comparison of ejector performance with and without the mixing guide vane was obtained. The ejector-diffuser system performance is discussed in terms of the entrainment ratio, pressure recovery as well as total pressure loss.
Identifying and Characterizing Nodes Important to Community Structure Using the Spectrum of the Graph
Yang Wang, Zengru Di, Ying Fan
PLOS ONE , 2011, DOI: 10.1371/journal.pone.0027418
Abstract: Background Many complex systems can be represented as networks, and how a network breaks up into subnetworks or communities is of wide interest. However, the development of a method to detect nodes important to communities that is both fast and accurate is a very challenging and open problem. Methodology/Principal Findings In this manuscript, we introduce a new approach to characterize the node importance to communities. First, a centrality metric is proposed to measure the importance of network nodes to community structure using the spectrum of the adjacency matrix. We define the node importance to communities as the relative change in the eigenvalues of the network adjacency matrix upon their removal. Second, we also propose an index to distinguish two kinds of important nodes in communities, i.e., “community core” and “bridge”. Conclusions/Significance Our indices are only relied on the spectrum of the graph matrix. They are applied in many artificial networks as well as many real-world networks. This new methodology gives us a basic approach to solve this challenging problem and provides a realistic result.
The Hybrid Approach to Teaching Graphics by Incorporating Cg Shading Language
Ying Tang,Jing Fan,Xujia Qin
Lecture Notes in Engineering and Computer Science , 2008,
Abstract:
The Stressors in Professional Women’s Work-family Conflict: A Chinese Study
Wei FAN,Ying FENG,Liangliang WU
Canadian Social Science , 2009,
Abstract: On the base of some existing studies on the “work-family conflict”, we investigated 121 professional women on role conflict. It summarizes the actuality of the professional women’s work-family conflict, discusses the relation of the women’s work-family conflict and their stressors, analyses the self-factors that effect the professional women’s work-family conflict. The result showed that (1) professional women’s self-role perceived and social-role perceived have conflicts;(2) education, incoming ratio, professional experience can influence the stress;(3) domesticity satisfaction, family activity, spouse stress, work devotion and work load are stressors of professional women’ s work-family conflict. Key words: professional woman; work family conflict; stressor Résumé: Sur la base des études existantes sur le "conflit travail-famille", nous avons enquêté sur 121 femmes professionnelles sur le r le des conflits. Il résume la réalité du conflit travail-famille des femmes professionnelles, traite de la relation entre le conflit travail-famille et leur origine de stress et analyse des facteurs qui ont des influences sur le conflit travail-famille des femmes professionnelles. Le résultat a montré que (1)il y a des conflits entre le r le personnel et le r le social chez les femmes professionnelles; (2) l'éducation, les revenus, l'expérience professionnelle peuvent influencer le stress; (3) la satisfaction de la domesticité, les activités familiales, le stress conjugal, le dévouement pour le travail et les charges professionnelles sont des origines de stress des femmes professionnelles dans le conflit travail-famille. Mots-Clés: femmes professionnelles; le conflit travail-famille; l’origine de stress
Orientation in Social Networks
Yanqing Hu,Ying Fan,Zengru Di
Physics , 2009,
Abstract: Stanley Milgram's small world experiment presents "six degrees of separation" of our world. One phenomenon of the experiment still puzzling us is that how individuals operating with the social network information with their characteristics can be very adept at finding the short chains. The previous works on this issue focus whether on the methods of navigation in a given network structure, or on the effects of additional information to the searching process. In this paper, we emphasize that the growth and shape of network architecture is tightly related to the individuals' attributes. We introduce a method to reconstruct nodes' intimacy degree based on local interaction. Then we provide an intimacy based approach for orientation in networks. We find that the basic reason of efficient search in social networks is that the degree of "intimacy" of each pair of nodes decays with the length of their shortest path exponentially. Meanwhile, the model can explain the hubs limitation which was observed in real-world experiment.
Quantum Phase diagram and time-of-flight absorption pictures of ultracold Bose system in a square optical superlattice
Fan Wei,Jun Zhang,Ying Jiang
Physics , 2015,
Abstract: In this letter, by the use of the generalized effective potential theory, with the help of process-chain approach under the framework of Kato formulation of perturbation expansion, we calculate out the quantum phase diagram up to 8-th order for an ultracold Bose system in a square optical superlattice. Base on these perturbative data, with the help of the linear fit extrapolation technique, more accurate results are gotten, which are in excellent agreement with recent Monte-Carlo numerical results. Moreover, by employing the generalized re-summed Green's function method and cumulant expansion, the momentum distribution function of the system is also calculated analytically and the time-of-flight absorption pictures of the system are plotted.
Spectral coarse graining for random walk in bipartite networks
Yang Wang,An Zeng,Zengru Di,Ying Fan
Physics , 2012, DOI: 10.1063/1.4773823
Abstract: Many real-world networks display a natural bipartite structure, while analyzing or visualizing large bipartite networks is one of the most challenges. As a result, it is necessary to reduce the complexity of large bipartite systems and preserve the functionality at the same time. We observe, however, the existing coarse graining methods for binary networks fail to work in the bipartite networks. In this paper, we use the spectral analysis to design a coarse graining scheme specifically for bipartite networks and keep their random walk properties unchanged. Numerical analysis on artificial and real-world bipartite networks indicates that our coarse graining scheme could obtain much smaller networks from large ones, keeping most of the relevant spectral properties. Finally, we further validate the coarse graining method by directly comparing the mean first passage time between the original network and the reduced one.
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