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Search Results: 1 - 10 of 53502 matches for " Feng HUA "
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The Research on Neutral Grounding Scheme of Fengxian 35kV and 10 kV Power Grid  [PDF]
Siming Hua, Hua Zhang, Feng Qian, Chunjie Chen, Meixia Zhang
Energy and Power Engineering (EPE) , 2013, DOI: 10.4236/epe.2013.54B172
Abstract:

Combined with actual situation of Fengxian power Supply Company, the neutral grounding modes of Fengxian 35 kV and 10 kV power grid are studied in the paper. The different frequencies injected method is used to measure the capacitive current of Fengxian 28 substations, and the neutral grounding modes of the 28 substations are determined based on the measured values of capacitive current.

Approximations of Numerical Method for Neutral Stochastic Functional Differential Equations with Markovian Switching
Hua Yang,Feng Jiang
Journal of Applied Mathematics , 2012, DOI: 10.1155/2012/675651
Abstract: Stochastic systems with Markovian switching have been used in a variety of application areas, including biology, epidemiology, mechanics, economics, and finance. In this paper, we study the Euler-Maruyama (EM) method for neutral stochastic functional differential equations with Markovian switching. The main aim is to show that the numerical solutions will converge to the true solutions. Moreover, we obtain the convergence order of the approximate solutions.
New Sharp Bounds for the Bernoulli Numbers and Refinement of Becker-Stark Inequalities
Hua-feng Ge
Journal of Applied Mathematics , 2012, DOI: 10.1155/2012/137507
Abstract: We obtain new sharp bounds for the Bernoulli numbers: 2(2)!/(2(22?1))<|2|≤(2(22?1)/22)(2)(2)!/(2(22?1)), =,
Analytic Approximation of the Solutions of Stochastic Differential Delay Equations with Poisson Jump and Markovian Switching
Hua Yang,Feng Jiang
Journal of Applied Mathematics , 2012, DOI: 10.1155/2012/305945
Abstract: We are concerned with the stochastic differential delay equations with Poisson jump and Markovian switching (SDDEsPJMSs). Most SDDEsPJMSs cannot be solved explicitly as stochastic differential equations. Therefore, numerical solutions have become an important issue in the study of SDDEsPJMSs. The key contribution of this paper is to investigate the strong convergence between the true solutions and the numerical solutions to SDDEsPJMSs when the drift and diffusion coefficients are Taylor approximations.
Allosteric Modulation of αβδ GABAA Receptors
Hua-Jun Feng
Pharmaceuticals , 2010, DOI: 10.3390/ph3113461
Abstract: GABA A receptors mediate the majority of the fast inhibition in the mature brain and play an important role in the pathogenesis of many neurological and psychiatric disorders. The αβδ GABA A receptor localizes extra- or perisynaptically and mediates GABAergic tonic inhibition. Compared with synaptically localized?αβγ receptors,?αβδ receptors are more sensitive to GABA, display relatively slower desensitization and exhibit lower efficacy to GABA agonism. Interestingly, αβδ receptors can be positively modulated by a variety of structurally different compounds, even at saturating GABA concentrations. This review focuses on allosteric modulation of recombinant αβδ receptor currents and αβδ receptor-mediated tonic currents by anesthetics and ethanol. The possible mechanisms for the positive modulation of αβδ receptors by these compounds will also be discussed.
Kikuchi Fujimoto disease associated with cryptogenic organizing pneumonia: case report and literature review
Feng Hua, Lei Zhu
BMC Infectious Diseases , 2010, DOI: 10.1186/1471-2334-10-64
Abstract: A 33-year-old male presented with a 1-month cough illness and fever lasting for 5 days. The chest radiograph revealed double lower lobe infiltrate, which was unresponsive to antibiotics. A cervical lymph node was first found in the development of this disease. Bronchoscopy, bronchoalveolar lavage and lung biopsy established the diagnosis of COP, while a lymph node biopsy was consistent with KFD. The patient improved on steroids.KFD and COP are possible part of a disease continuum, rather than separate entities.Cryptogenic organizing pneumonia (COP) is an interstitial lung disease characterized by intra-alveolar buds of connective tissue [1]. It can be idiopathic or associated with a known underlying disease.In this case report, we present a 33-year-old man with COP, followed by concomitant Kikuchi Fujimoto disease (KFD). KFD was first described in 1972 by Kikuchi and Fujimoto and others. It is a clinicopathological entity that commonly presents with cervical lymphadenopathy and fever in the absence of an active infectious disease. KFD is a rare histiocytic necrotizing lymphadenitis, which has a benign self-limiting clinical course. Its origin is unknown, but an abnormal autoimmune reaction has been suggested and infection is often considered as an inducing feature [2].To the best of our knowledge, this is the first case report of COP and KFD.A 33-year-old man presented with a 1-month coughing illness and fever that lasted for 5 days. Before admission, the patient experienced expectoration of yellow sputum and antibiotic therapy for 2 weeks. There was no history of fever, rash or respiratory distress, and there was no family history of autoimmune or connective tissue disorders. Respiratory examinations revealed fine crackles in both lungs. Examination of other systems was unremarkable.The laboratory investigation showed hemoglobin 140 g/L, leukocytes 3.9 × 109/L with a normal differential count, platelets 142 × 109/L, C-reactive protein 1.2 mg/L, and an erythrocyte s
General methods for clinical effect assessment of traditional Chinese medicine
WEI Hua-Feng
Zhong Xi Yi Jie He Xue Bao , 2005,
Abstract: Along with the changes of disease spectrum, medical models and health concept, people pay more and more attention to the diagnostic and therapeutic approaches of traditional Chinese medicine (TCM). With the effect assessment being changed from disease-based model to patient-based model, how to scientifically and objectively explain the validity of TCM has become the premise for further development of TCM and dissemination of it throughout the world. In this article, the authors analyzed the status quo and problems of the effect assessment of TCM, and proposed some general methods for clinical effect assessment of TCM, including formulating criteria for syndrome differentiation under the guidance of TCM theories, paying attention to quality of life, proper selection of indexes for outcome assessment, application of modern clinical study methods, such as the methods of evidence-based medicine and clinical epidemiology, designing randomized controlled trials, multi-subject co-operation, strict supervision of the quality of researches, and establishment of organizations for professional training.
Research on the Technical Growth Capability of Enterprises and the Countermeasures
Duo Feng,Hua Wei
Asian Social Science , 2009, DOI: 10.5539/ass.v5n3p37
Abstract: In recent years, how to develop enterprise technological capability has become the foremost issue to be tackled without delay in both the theoretical and practical areas. This paper uses a model to testify the non-linear growing law of technological capability in its life circle from the viewpoint of its connotation and growth mechanism, and puts forward specific measures to elevate the technological capability aiming at its traits in different stages of its life circle.
A Research on HCCA Mechanism of Wireless LAN Access
Hua Liang,Feng Zeng
Journal of Networks , 2012, DOI: 10.4304/jnw.7.5.845-849
Abstract: Analyzed the quality of service (Qos) scheduling mechanism of IEEE802. 11e, discussed the simple scheduling algorithm (Simple Scheduler) and its deficiencies exist in supporting variable bit-rate service (VBR). And then proposed a improved algorithm which adapts to the real time VBR service. The algorithm can dynamically adjust the service interval and the TXOP of per flow. Finally, implement the algorithm on NS2. Compared with the HCCA, simulation results show that our mechanism
X-Ray Monitoring of Ultraluminous X-Ray Sources
Philip Kaaret,Hua Feng
Physics , 2009, DOI: 10.1088/0004-637X/702/2/1679
Abstract: X-ray monitoring observations were performed with the Swift observatory of the ultraluminous X-ray sources Holmberg IX X-1, NGC 5408 X-1, and NGC 4395 X-2 and also of the nuclear X-ray source in NGC 4395. Holmberg IX X-1 remains in the hard X-ray spectral state as its flux varies by a factor of 7 up to an (isotropic) luminosity of 2.8E40 erg/s. This behavior may suggest an unusually massive compact object. We find excess power at periods near 60 days and 28 days in the X-ray emission from Holmberg IX X-1. Additional monitoring is required to test the significance of these signals. NGC 5408 X-1 and NGC 4395 X-2 appear to remain in the soft spectral state found by Chandra and XMM with little variation in spectral hardness even as the luminosity changes by a factor of 9. We found an outburst from the nuclear source in NGC 4395 reaching an X-ray luminosity of 9E40 erg/s, several times higher than any previously reported.
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