OALib Journal期刊

ISSN: 2333-9721




2018 ( 43 )

2017 ( 48 )

2016 ( 72 )

2015 ( 974 )


匹配条件: “Feng Xiong” ,找到相关结果约37004条。
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
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.


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.
A Novel in Vitro Three-Dimensional Macroporous Scaffolds from Bacterial Cellulose for Culture of Breast Cancer Cells  [PDF]
Guangyao Xiong, Honglin Luo, Feng Gu, Jing Zhang, Da Hu, Yizao Wan
Journal of Biomaterials and Nanobiotechnology (JBNB) , 2013, DOI: 10.4236/jbnb.2013.44040

In this work, patterned macropores with a diameter larger than 100 μm were introduced to pristine three-dimensional (3D) nanofibrous bacterial cellulose (BC) scaffolds by using the infrared laser micromachining technique in an attempt to create an in vitro model for the culture of breast cancer cells. The morphology, pore structure, and mechanical performance of the obtained patterned macroporous BC (PM-BC) scaffolds were characterized by scanning electron microscopy (SEM), mercury intrusion porosimeter, and mechanical testing. A human breast cancer cell (MDA-MB-231) line was cultured onto the PM-BC scaffolds to investigate the role of macropores in the control of cancer cell behavior. MTT assay, SEM, and hematoxylin and eosin (H&E) staining were employed to determine cell adhesion, growth, proliferation, and infiltration. The PM-BC scaffolds were found to be able to promote cellular adhesion and proliferation on the scaffolds, and further to allow for cell infiltration into the PM-BC scaffolds. The results demonstrated that BC scaffolds with laser-patterned macropores were promising for the in vitro 3D culture of breast cancer cells.

Effect of Carbon Content on Ti Inclusion Precipitated in Tire Cord Steel  [PDF]
Yuedong Jiang, Jialiu Lei, Jing Zhang, Rui Xiong, Feng Zou, Zhengliang Xue
Journal of Surface Engineered Materials and Advanced Technology (JSEMAT) , 2013, DOI: 10.4236/jsemat.2013.34038

The precipitation of TiN inclusion during solidification of different carbon content of 0.72%, 0.82% and 0.95% in tire cord steel is thermodynamically studied respectively. The results show that the carbon content has obvious effect on TiN inclusion precipitated in tire cord steel of different strength levels. With the carbon content of tire cord steel increasing, the temperature before solidifying reduced gradually and the required activity product of titanium and nitrogen for TiN inclusion precipitation also declined gradually. With the same condition of initial Ti and N content in liquid steel, the size of TiN inclusion precipitated in tire cord steel of higher carbon content is bigger than that of lower carbon content. In order to control the harmful effects on processability of TiN inclusion precipitated in hypereutectoid tire cord steel of the ultra high strength level, the measures of smelting process must be taken to further reduce the titanium and nitrogen content in liquid steel.


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