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Search Results: 1 - 10 of 83266 matches for " Chen Xiong "
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An Empirical Analysis for Over-Sophisticated Export and Regional Economic Growth  [PDF]
Yanjin Chen, Xiangmin Xiong
Modern Economy (ME) , 2014, DOI: 10.4236/me.2014.512103
Abstract: This paper investigates the hypothesis of export sophistication-led growth in the case of China. Using a panel data covering Chinese provinces and the period between 2003 and 2008, this paper examines whether regional exports with higher sophistication help to increase rates of regional growth. The empirical results reveal a positive relationship between export sophistication and growth in China. And the relationship is found to be driven by the export of coastal provinces.
Orthodontic camouflage versus orthognathic surgery: A comparative analysis of long-term stability and satisfaction in moderate skeletal Class III  [PDF]
Xueyan Xiong, Yaxin Yu, Fengshan Chen
Open Journal of Stomatology (OJST) , 2013, DOI: 10.4236/ojst.2013.31016
Objective: The purpose of this study was to compare long-term stability and satisfaction between orthodontic camouflage and orthognathic surgery in treatment of moderate skeletal Class III adults. Materials and Methods: A total of 25 adults females who had been treated with orthodontic camouflage for Class III malocclusions were recalled at least 3 years post-treatment to evaluate stability and satisfaction with treatment outcomes. The data were compared with similar data for long-term outcomes in 21 patients with the same Class III problems who had bimaxillary surgical correction. Results: In the camouflage patients, small mean changes in skeletal landmark positions occurred over the long term, although the changes were generally much smaller than in the surgery patients. Dental changes in the surgery group were more severe than those in the camouflage group. The camouflage patients reported fewer functional or temporomandibular joint problems than did the surgery patients. Both groups reported similar levels of overall satisfaction with treatment. Conclusion: The results suggest that both camouflage and surgical treatment in moderate skeletal Class III adults can achieve satisfactory outcomes and provide long-term stability. If patients do not readily accept surgery because of potential surgical complications or financial difficulties, camouflage treatment may be an effective alternative treatment.
Development of Digital-Controlled Measuring Instrument for Hearing  [PDF]
Longcong Chen, Gaiqin Liu, Bin Gao, Ping Chen, Xingliang Xiong
Journal of Signal and Information Processing (JSIP) , 2012, DOI: 10.4236/jsip.2012.34055
Abstract: A digital-controlled measuring instrument for hearing, which is mainly composed of STC11F16EX, AD9833, ISD400416MS and LM1972, is introduced in this paper. It may output highly accurate and purified sine signal whose frequency and amplitude are controlled by digital data. Specially, the displaying number of decibel is equal to actual number of decibel because that frequency response of earphone is corrected through software of microcontroller. Additionally, touching buttons, which is simple and convenience to use, is selected. Hence this instrument is convenient to measure and teach about hearing specially, research and study on frequency characteristic of human ear and impedance characteristic of human body in medical science.
Development of a Double-Channel Medical Signal Generator Based on STM32 with High Performance  [PDF]
Longcong Chen, Gaiqin Liu, Bin Gao, Ping Chen, Xingliang Xiong
Open Journal of Applied Sciences (OJAppS) , 2012, DOI: 10.4236/ojapps.2012.24040
Abstract: An open-ended and multifunctional double-channel signal generator, which based on a 32 bits monolithic integrated microcomputer, highly integrated device and LCD, is introduced in this paper. The instrument is composed of micro-computer STM32F103RD and some integrated chips (IC), which includes programmable waveform generators-AD9833 with highly frequency and phase precision. As a result, this signal generator may output not only double channels accurate sine, square or triangle waveforms with digital-controlled frequency and phase at the same time, but also many kinds of physiological signals that can be modified by USB connection with well open property. Therefore, it is convenient to measure and teach about hearing, research and study on frequency characteristic of human ear and impedance characteristic of human body in medical science. In addition, it is also very easy in experiment and research of college and medical physics for using double channels sine signal to show synthesis of two simple harmonic vibrations under different frequency, phase difference and direction, such as beat pattern and Lissajous figures. Thus it has many merits, such as the small volume, stable property, simple operation, visual display and so on. Consequently, it can be widely used in researching, teaching, debugging and maintaining.
The pointwise dimension of self-similar measures
Ercai Chen,Jincheng Xiong
Chinese Science Bulletin , 1999, DOI: 10.1007/BF03182695
Abstract: The problem about the existence of pointwise dimension of self-similar measure has been discussed. The Hausdorff dimension of the set of those points for which the pointwise dimension does not exist equals the dimention of support of the self-similar measure.
Dimension and measure theoretic entropy of a subshift in symbolic space
Ercai Chen,Jincheng Xiong
Chinese Science Bulletin , 1997, DOI: 10.1007/BF02882845
The Real Options Model of Optimal Timing in Banks’ Write-off Decisions under Dynamic Circumstance
Jinlong Chen,Tao Xiong
International Business Research , 2009, DOI: 10.5539/ibr.v1n1p72
Abstract: This paper employs a real option approach to evaluate the value of the option to delay write-offs non-performing loans (NPLs) in commercial banks. On the assumption that the callback rate of NPLs follows the standard geometric Bronian and the reinvestment return follows jump-diffusion model, the partial differential equation which the value keep to is obtained using dynamic programming technique. With the condition of value-matching and smooth-pasting, the solution of the equation is obtained. The optimal timing in banks’ writing off their NPLs is gained with the solution, along with the condition to put off disposal of NPLs.
Blow-up and general decay of solutions for a nonlinear viscoelastic equation
Wenying Chen,Yangping Xiong
Electronic Journal of Differential Equations , 2013,
Abstract: In this article we investigate a nonlinear viscoelastic equation that admits blow-up and decay. First, we establish blow-up results for this equation, even for vanishing initial energy. Then, we show that the solutions decay under suitable conditions.
Constructing a chaotic system with any number of equilibria
Xiong Wang,Guanrong Chen
Physics , 2012,
Abstract: In the chaotic Lorenz system, Chen system and R\"ossler system, their equilibria are unstable and the number of the equilibria are no more than three. This paper shows how to construct some simple chaotic systems that can have any preassigned number of equilibria. First, a chaotic system with no equilibrium is presented and discussed. Then, a methodology is presented by adding symmetry to a new chaotic system with only one stable equilibrium, to show that chaotic systems with any preassigned number of equilibria can be generated. By adjusting the only parameter in these systems, one can further control the stability of their equilibria. This result reveals an intrinsic relationship of the global dynamical behaviors with the number and stability of the equilibria of a chaotic system.
A chaotic system with only one stable equilibrium
Xiong Wang,Guanrong Chen
Physics , 2011, DOI: 10.1016/j.cnsns.2011.07.017
Abstract: If you are given a simple three-dimensional autonomous quadratic system that has only one stable equilibrium, what would you predict its dynamics to be, stable or periodic? Will it be surprising if you are shown that such a system is actually chaotic? Although chaos theory for three-dimensional autonomous systems has been intensively and extensively studied since the time of Lorenz in the 1960s, and the theory has become quite mature today, it seems that no one would anticipate a possibility of finding a three-dimensional autonomous quadratic chaotic system with only one stable equilibrium. The discovery of the new system, to be reported in this Letter, is indeed striking because for a three-dimensional autonomous quadratic system with a single stable node-focus equilibrium, one typically would anticipate non-chaotic and even asymptotically converging behaviors. Although the new system is not of saddle-focus type, therefore the familiar \v{S}i'lnikov homoclinic criterion is not applicable, it is demonstrated to be chaotic in the sense of having a positive largest Lyapunov exponent, a fractional dimension, a continuous broad frequency spectrum, and a period-doubling route to chaos.
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