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An Inexact Implementation of Smoothing Homotopy Method for Semi-Supervised Support Vector Machines  [PDF]
Huijuan Xiong, Feng Shi
Journal of Data Analysis and Information Processing (JDAIP) , 2013, DOI: 10.4236/jdaip.2013.11001
Abstract: Semi-supervised Support Vector Machines is an appealing method for using unlabeled data in classification. Smoothing homotopy method is one of feasible method for solving semi-supervised support vector machines. In this paper, an inexact implementation of the smoothing homotopy method is considered. The numerical implementation is based on a truncated smoothing technique. By the new technique, many “non-active” data can be filtered during the computation of every iteration so that the computation cost is reduced greatly. Besides this, the global convergence can make better local minima and then result in lower test errors. Final numerical results verify the efficiency of the method.
Analysis on the Causes and Countermeasures of the Economic Predicament in the Northeast China  [PDF]
Feng Xiong
Modern Economy (ME) , 2016, DOI: 10.4236/me.2016.79103
Abstract: The economy of northeast China developed very well over the last 50 years. But now, as China steps into the “new normal”, the economy of northeast China is declining rapidly. The reasons are as follows. Firstly, the secondary industry is important to northeast economy and the service sector develops slowly. Secondly, state-owned enterprises contribute too much to the development while the private enterprises are too weak. Thirdly, the only way to promote the economy in northeast is investment. Last but not least, government’s investment attraction is not effective. This paper illustrates some advice to promote the economy. First of all, it may be urgent to develop tertiary industry. Second, the reform of state-owned enterprises as Temasek Holdings is inevitable. Third, the economic power should be changed from the investment-driven into innovation-driven and the investment promotion mode should also be changed.
Analysis of the Dilemma and Path of College Teacher Development in Mainland China  [PDF]
Feng Xiong
Open Access Library Journal (OALib Journal) , 2017, DOI: 10.4236/oalib.1103873
Abstract:
Teacher development (TD) is an important task for colleges and universities in mainland China. By comparing the history and current situation of TD at home and abroad, the study analyzes the dilemmas and causes of TD in mainland China, and explores the paths of TD. Facing these dilemmas that the model of TD is single, development service provided by universities does not match teachers’ internal demands, and evaluation system is not perfect, the study tries the following three aspects to explore the paths, which include developing measures at every phase based on college teachers’ characteristics, playing the function of TD center and promoting their self-organized development, and establishing and improving the evaluation system of TD and promote coordinated TD.
Research on Marketing Strategies on Existing Line in Cargo Transport Market under the Separation of Passenger and Freight Traffic in China
Fenling Feng,Lingling Xiong
International Journal of Business and Management , 2011, DOI: 10.5539/ijbm.v6n9p183
Abstract: Based on the SWOT analysis of railway cargo transportation market, the paper chose and fixed the position of the object market of the existing lines of cargo transport after the separation of passengers and cargoes into different lines by rail, pointed that we should be actively develop new products to satisfy the market diversified demand and further made suggestions for the marketing, including establishing a flexible rate system, improving marketing channels, promotional efforts, personnel quality and service quality.
Furstenberg Families and Sensitivity
Huoyun Wang,Jincheng Xiong,Feng Tan
Discrete Dynamics in Nature and Society , 2010, DOI: 10.1155/2010/649348
Abstract: We introduce and study some concepts of sensitivity via Furstenberg families. A dynamical system (,) is ?-sensitive if there exists a positive such that for every ∈ and every open neighborhood of there exists ∈ such that the pair (,) is not ?--asymptotic; that is, the time set {∶((),())>} belongs to ?, where ? is a Furstenberg family. A dynamical system (,) is (?1, ?2)-sensitive if there is a positive such that every ∈ is a limit of points ∈ such that the pair (,) is ?1-proximal but not ?2--asymptotic; that is, the time set {∶((),())<} belongs to ?1 for any positive but the time set {∶((),())>} belongs to ?2, where ?1 and ?2 are Furstenberg families.
Structure and multiferroic properties of Y-doped BiFeO3 ceramics
BaoLin Feng,Hao Xue,ZhaoXian Xiong
Chinese Science Bulletin , 2010, DOI: 10.1007/s11434-009-0293-1
Abstract: Bismuth ferrite, BiFeO3, is an important multiferroic material, which simultaneously exhibits ferroelectric ordering and antiferromagnetic ordering in bulk form. Samples of Bi1-x Y x FeO3 (x=0, 0.05, 0.10, 0.15 and 0.20) were prepared by conventional solid state reaction. By X-ray diffraction and Raman scattering spectra, the crystal structures of the samples were identified as rhombohedral with R3c space group, in addition to a second phase at x 0.05. Multiferroic properties of the samples were also measured. With the increasing of Y content, the relative dielectric constants of the samples increased gradually, while the loss tangents firstly decreased and then began to increase. Meanwhile, the saturation magnetization values were significantly enhanced, namely 0.1440, 0.7468, 1.9217, 3.3309 and 6.2774 emu/g at 300 K for x=0, 0.05, 0.10, 0.15 and 0.20, respectively.
MATHEMATICAL ANALYSIS FOR POINT-DOPING IN ZONE MELTING
区域熔化点掺杂的数学分析

YANG XIONG-FENG,
杨雄风

物理学报 , 1974,
Abstract: 本文对区域熔化点掺杂过程进行了详细的数学分析。得到了点掺杂区熔后杂质沿锭长分布的一系列普遍公式。在本文研究的范围内,利用这些公式,不难写出任意次区熔后锭条上的杂质分布,而不受区熔次数和掺杂点数目之限制。作为一个特例,具体计算了k=0.35,四点掺杂,三次区熔后杂质沿锭长的分布情况,得到:当各掺杂点之位置与掺杂量选取适当时,在总锭长为21.5个熔区长度的料锭中,其16个熔区长度范围内的杂质浓度相对起伏可小于±3.0%。
Reply to arXiv:1211.3957 and arXiv:1211.4731 by Leader et al. and arXiv:1212.0761 by Harindranath et al
Ji, Xiangdong;Xiong, Xiaonu;Yuan, Feng
High Energy Physics - Phenomenology , 2013,
Abstract: We reply to the recent comments on our published papers, Phys. Rev. Lett. 109 (2012) 152005 and Phys. Lett. B717 (2012) 214. We point out that the criticisms about the transverse polarization parton sum rule we obtained are invalid.
Effect of Crataegus Usage in Cardiovascular Disease Prevention: An Evidence-Based Approach
Jie Wang,Xingjiang Xiong,Bo Feng
Evidence-Based Complementary and Alternative Medicine , 2013, DOI: 10.1155/2013/149363
Abstract: Hawthorn (Crataegus oxyacantha) is a widely used Chinese herb for treatment of gastrointestinal ailments and heart problems and consumed as food. In North America, the role of treatment for heart problems dates back to 1800. Currently, evidence is accumulating from various in vivo and in vitro studies that hawthorn extracts exert a wide range of cardiovascular pharmacological properties, including antioxidant activity, positive inotropic effect, anti-inflammatory effect, anticardiac remodeling effect, antiplatelet aggregation effect, vasodilating effect, endothelial protective effect, reduction of smooth muscle cell migration and proliferation, protective effect against ischemia/reperfusion injury, antiarrhythmic effect, lipid-lowering effect and decrease of arterial blood pressure effect. On the other hand, reviews of placebo-controlled trials have reported both subjective and objective improvement in patients with mild forms of heart failure (NYHA I–III), hypertension, and hyperlipidemia. This paper discussed the underlying pharmacology mechanisms in potential cardioprotective effects and elucidated the clinical applications of Crataegus and its various extracts. 1. Introduction Hawthorn (Crataegus oxyacantha), also known as haw, maybush, or whitehorn, is part of a genus of spiny shrubs and trees native to temperate regions in the Northern Hemisphere in Europe, Asia, and North America [1]. It belongs to the Rosaceae family and consists of bright green leaves, white flowers, and bright red berries (as shown in Figure 1). Hawthorn has been used in folk medicine for the treatment of diarrhea, gall bladder disease, insomnia, and as an antispasmodic agent in the treatment of asthma [2]. In Chinese, hawthorn was also used for a variety of conditions including digestive problems, hyperlipidemia, poor circulation, and dyspnea [3, 4]. For example, the dried fruits are traditionally used as a digestive aid and are often made into jam, jelly, candies, or wine [5]. Also, preparations of hawthorn are available in various forms ranging from infusions and tinctures to standardized extracts and may be available variously as authorized prescription drugs, over-the-counter (OTC) medications, authorized herbal medicinal products, dietary supplements, or unregulated herbal remedies. The use of hawthorn for the treatment of cardiovascular heart disease dates back to the late 1800s [6, 7]. Current claims suggested that hawthorn could be used as an alternative therapy for various cardiovascular diseases, such as angina, hypertension, hyperlipidemia, arrhythmia, and New York
Inducing Chalcogenide Phase Change with Ultra-Narrow Carbon Nanotube Heaters
Feng Xiong,Albert Liao,Eric Pop
Physics , 2009, DOI: 10.1063/1.3273370
Abstract: Carbon nanotube (CNT) heaters with sub-5 nm diameter induce highly localized phase change in Ge2Sb2Te5 (GST) chalcogenide. A significant reduction in resistance of test structures is measured as the GST near the CNT heater crystallizes. Effective GST heating occurs at currents as low as 25 uA, significantly lower than in conventional phase change memory with metal electrodes (0.1-0.5 mA). Atomic force microscopy reveals nucleation sites associated with phase change in GST around the CNT heater. Finite element simulations confirm electrical characteristics consistent with the experiments, and reveal the current and phase distribution in GST.
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