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Search Results: 1 - 10 of 76402 matches for " Xin Yang "
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A New Delay-Constrained Multicast Routing Algorithm Based on Shared Edges  [PDF]
Chunde Yang, Xin Zhao
Communications and Network (CN) , 2014, DOI: 10.4236/cn.2014.61006
Abstract:

In this paper, we made a detail analysis for the ESAMPH algorithm, and proposed ESAMPH_D algorithm according to the insufficient of ESAMPH algorithm. The ESAMPH_D algorithm does not consider those paths that do not satisfy the delay constraint, so we can ensure that all paths be taken into account will meet the limit of delay constraint, then we find the least costly path in order to build a minimum cost multicast tree. Simulation results show that the algorithm is better than ESAMPH algorithm in performance.

Energy Recovery Efficiency of Flow-coupled Flywheel Vehicle
Xin Yang
Research Journal of Applied Sciences, Engineering and Technology , 2012,
Abstract: In this study a flow-coupled flywheel vehicle was proposed and its energy recovery efficiency was discussed. This new kind of flywheel vehicle has simpler configuration, fewer components and easier control method. And it was confirmed that this system had enough capability to recover vehicle kinetic energy that might otherwise be lost as heat during braking. Then, more attentions were paid to initial speed of recovery flywheel and displacement ratio of variable displacement pump/motor that influenced recovery efficiency of the proposed hybrid vehicle. Experimental results show that the maximum recovery efficiency will amount to about 82%. It is also significant to point out that in order to improve recovery efficiency, the displacement size of variable displacement pump/motor is required so as to make it operates as maximum displacement and the initial speed of the recovery flywheel is limited at a suitable scope (about 1000~3000 rpm) with regard to the windage and axial loss and the amount of energy storage. Hence, it is indicated that this type of hybrid vehicle can be as an optional configuration to widely use in hybrid vehicle.
Signal Classification Method Based on Support Vector Machine and High-Order Cumulants  [PDF]
Xin ZHOU, Ying WU, Bin YANG
Wireless Sensor Network (WSN) , 2010, DOI: 10.4236/wsn.2010.21007
Abstract: In this paper, a classification method based on Support Vector Machine (SVM) is given in the digital modulation signal classification. The second, fourth and sixth order cumulants of the received signals are used as classification vectors firstly, then the kernel thought is used to map the feature vector to the high dimensional feature space and the optimum separating hyperplane is constructed in space to realize signal recognition. In order to build an effective and robust SVM classifier, the radial basis kernel function is selected, one against one or one against rest of multi-class classifier is designed, and method of parameter selection using cross- validation grid is adopted. Through the experiments it can be concluded that the classifier based on SVM has high performance and is more robust.
Analysis of Energy Consumption Scenarios of Building in Guangzhou in a Mid-Long Term  [PDF]
Lan Tang, Xiaoqing Zhou, Xin Yang
Journal of Power and Energy Engineering (JPEE) , 2014, DOI: 10.4236/jpee.2014.24045
Abstract: According to the year of 2009, calculated energy consumption quantity and energy consumption structure of building in Guangzhou to 2030, analyzed adjustment and approach of sustainable development and potential of energy conservation which can provide commendable technology progress in every department.
The Evaluation of Measurement Uncertainty and Its Application in the Vacuum Pressure Measurement  [PDF]
Yulin Zhou, Xin Quan, Tieniu Yang
Open Journal of Applied Sciences (OJAppS) , 2015, DOI: 10.4236/ojapps.2015.58048
Abstract: In order to accurately measure the pressure and the pressure difference between two points in the vacuum chamber, a large number of experimental data were used to research the performance of the three capacitance diaphragm gauge and analysis the main influences of the uncertainly degree of pressure in the process. In this paper, three kind of uncertainty, such as the single uncertainty, the synthesis uncertainty and the expanded uncertainty of the three capacitance diaphragm gauges are introduced in detail in pressure measurement. The results show that the performance difference of capacitance diaphragm gauge can be very influential to the accuracy of the pressure difference measurement and the uncertainty of different pressure can be very influential to pressure measurement. That for accurately measuring pressure and pressure difference has certain reference significance.
An Ultra-Low Quiescent Current CMOS Low-Dropout Regulator with Small Output Voltage Variations  [PDF]
Xin Cheng, Yizhong Yang, Longjie Du, Yang Chen, Guangjun Xie
Journal of Power and Energy Engineering (JPEE) , 2014, DOI: 10.4236/jpee.2014.24064
Abstract: An ultra-low quiescent current low-dropout regulator with small output voltage variations and improved load regulation is presented in this paper. It makes use of dynamically-biased shunt feedback as the buffer stage and the LDO regulator can be stable for all load conditions. The proposed structure also employs a momentarily current-boosting circuit to reduce the output voltage to the normal value when output is switched from full load to no load. The whole circuit is designed in a 0.18 μm CMOS technology with a quiescent current of 550 nA. The maximum output voltage variation is less than 20 mV when used with 1 μF external capacitor.
The Rate of Asymptotic Normality of Frequency Polygon Density Estimation for Spatial Random Fields  [PDF]
Shanchao Yang, Xin Yang, Guodong Xing, Yongming Li
Open Journal of Statistics (OJS) , 2018, DOI: 10.4236/ojs.2018.86064
Abstract: This paper is to investigate the convergence rate of asymptotic normality of frequency polygon estimation for density function under mixing random fields, which include strongly mixing condition and some weaker mixing conditions. A Berry-Esseen bound of frequency polygon is established and the convergence rates of asymptotic normality are derived. In particularly, for the optimal bin width \"\", it is showed that the convergence rate of asymptotic normality reaches to \"\"?when mixing coefficient tends to zero exponentially fast.
Research advances in treatment of cerebral ischemic injury by acupuncture of conception and governor vessels to promote nerve regeneration
Zhuo-xin Yang
Zhong Xi Yi Jie He Xue Bao , 2012,
Abstract: Cerebral ischemia is one of the most common diseases treated by acupuncture therapeutics. Recent studies indicated that acupuncture treatment by needling the conception and governor vessels had positive effects in promoting neural regeneration in patients after cerebral ischemia injury. Acupuncture intervention could continuously promote the proliferation and differentiation of the neural stem cells in the brain, obviously up-regulate expression of growth factors, accelerate angiogenesis and inhibit apoptosis. Hence, it is necessary to present an exhaustive review on the mechanisms. The present review gives a detailed description of pathological changes of cerebral ischemia and acupuncture intervention applied to the conception and governor vessels, and proposes research prospects in the future.
Study strategies for acupuncture treatment of chronic nonbacterial prostatitis
Zhuo-xin Yang
Zhong Xi Yi Jie He Xue Bao , 2012,
Abstract: ABSTRACT: By retrospectively reviewing the current status of traditional Chinese medicine (TCM) and Western medicine treatments of chronic nonbacterial prostatitis (CNP), the TCM understanding of its etiologies and pathogenesis, the therapeutic principles and the mechanisms of acupuncture treatment of CNP, the clinical study strategies of acupuncture treatment for CNP were further proposed, which could provide more scientific basis and support for the definite longer-term therapeutic efficacy of acupuncture treatment of CNP. Breakthrough in the treatment of CNP will be achieved with the application of acupuncture therapy both in clinical practice and experimental research.
Growth, Thermal and Spectroscopic Characteristics of Nd3+;LiBi(MoO4)2 Crystal
HUANG Xin-Yang
无机材料学报 , 2010, DOI: 10.3724/sp.j.1077.2010.01307
Abstract: The crystal growth, thermal and polarized spectroscopic characteristics of Nd3+:LiBi(MoO4)2 crystal were investigated. The Nd3+:LiBi(MoO4)2 crystal up to 15mm×25 mm was grown by Czochralski technique. The specific heat is 0.32 J/(g·K) at 330K. The thermal expansion coefficients for c and a axes are 2.767×10-5/K and 1.521×10-5/K, respectively. The absorption cross sections are 5.04×10-20 cm2 and 8.35×10-20 cm2 at around 806 nm with the FWHM of 15 nm for σ-polarization and π-polarization, respectively. The emission cross sections are 1.325×10-19cm2 at 1062nm for σ-polarization and 1.937×10-19cm2 at 1068 nm for π-polarization. Based on Judd-Ofelt theory, some spectral parameters of Nd3+:LiBi(MoO4)2 crystal are obtained. The parameters of oscillator strengths Ωλ are: Ω2 = 25.40×10-20 cm2, Ω4 = 7.79×10-20 cm2, Ω6 = 6.37×10-20 cm2. The radiative and fluorescence lifetimes are 198 ms and 128 ms, respectively. The quantum efficiency h is 64.64%.
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