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Single Epoch Ambiguity Resolution Based on FirCAR

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Single Epoch Ambiguity Resolution Based on FirCAR

第三届中国卫星导航学术年会

作者： Wei Feng1,Dingfa Huang1,Yan Li1,Meng Li11school of Geosciences and environmental {3.,southwest jiaotong university,chengdu 61003.,sichuan,china

Single epoch ambiguity resolution（AR） is affected by the pseudorange accuracy,especially for the situation with a few satellites *** such case,the float solution is not always good enough to resolve ambiguity epoch by epoch,and leads to a lower success *** increase the success rate of single epoch AR,the ratio value in ambiguity validation procedure could be relaxed to a lower value,while the precise stochastic model of GNSS observation is *** socalled FirCAR（dual-Frequency integer relationship Constrained Ambiguity Resolution） method is able to resolve ambiguities for high-elevation satellites using dual-frequency data in short baseline,and improve the accuracy of the float *** methods are used to resolve the unfixed ambiguities depending on the accuracy of the float *** off algorithm is adopted when each float ambiguity is close enough to an ***,ambiguity search algorithm is *** are conducted in static and kinematic mode using GPS measurements,and the experimental results indicate that:higher success rates are achieved with the proposed FirCAR method compared with the conventional search algorithm for single epoch AR,even only a few satellites are available;more than 70% epochs available are fixed by rounding off algorithm throughout the period of 24 h experiments.

关键词： GNSS Ambiguity resolution Single epoch FirCAR ROUND

Stability Analysis of Two-Dimensional Panel Subjected to Random In-Panel Forces and Subsonic Turbulent Flow

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Stability Analysis of Two-Dimensional Panel Subjected to Ran...

2011 World Congress on engineering and Technology(CET 2011)

作者： Peng Li National Traction Power Laboratory southwest jiaotong university chengdu 61003. People’s Republic of china Yiren Yang {3. of Mechanics and engineering southwest jiaotong university chengdu 61003. People’s Republic of china

Stability of viscoelastic panel subjected to random external forces and subsonic turbulent flow is *** panel under studied is two dimensional and simply *** aerodynamic pressure due to the panel motion is obtain based on the potential theory and the other aerodynamic pressure independent of panel motion is considered as the sum of external static pressure and the random pressure which is induced by the turbulent boundary *** Galerkin method is used to transform the governing partial differential equation to a set of ordinary differential *** response moment equations are generated for two modes using Fokker-Planck equation *** is found that the instability of the first order moment equation corresponds to the case of static *** the case of second moment equation the stability condition are obtained in term of aerodynamic pressure,structure damping coefficients,static in-panel loading force,spectral density of the random in-panel force and mass ratio.

关键词： stochastic analysis stability subsonic turbulent flow viscoelastic panel Fokker-Planck equation

Beat-less Control Technology and Its Application in Three-level Inverter

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Beat-less Control Technology and Its Application in Three-le...

第11届国际电机与系统学术会议

作者： Xinglai Ge Xiaoyun Feng Baisi Liu and Shihao Chen school of Electrical engineering southwest jiaotong university {3. 61003. china

＜正＞The paper analyzed the generating process of second-harmonic DC-link voltage and the influence of beat phenomenon on traction motor in the single-phase three-level converterinverter traction system of high-speed *** on the research of operation modes of traction inverter,the beat-less control technology was given,and different control strategies under multi-pulse modulation and single-pulse control mode were *** beat-less control algorithm was proved to be effective by MATLAB simulation and DSP-based control experiment system.

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A Design Strategy for Product Development Using Anthropometry

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A Design Strategy for Product Development Using Anthropometr...

2010 International Conference on Advanced Measurement and Test (AMT 2010)

作者： Yefei Li 1,a,Fangyu Li 2,b,Hui Jiang 3.c,Fang Huang 4,d 1 school of Mechatronics engineering,university of Electronic {3. and Technology of china,chengdu,sichuan,61173.,P.R.C 2 school of Arts and Communications,southwest jiaotong university,chengdu,sichuan,611756,P.R.C 3.school of Microelectronics and Solid State Electronics,university of Electronic {3. and Technology of china,chengdu,sichuan,610054,P.R.C 4 school of Automation,university of Electronic {3. and Technology of china,chengdu,sichuan,61173.,P.R.C

To achieve success in the marketplace,human factors play an important role in product *** this paper a design strategy considering anthropometric variability for different demographic data was put *** the aid of parametric technology of Computed Aided Design(CAD),concept model of products was *** parameters of products were configured according to the anthropometric information based on measurement of customers'.Multiple linear regression were used to model the relation between the product comfort and design variables,thus the sizes of products could adapt to specific customers of certain age,height and gender.A children's scooter was demonstrated as a case to validate this strategy.A three dimension parametric model of a scooter was built first,the parameters concerned with human factors were determined according to the knowledge of anthropometry.

关键词： design strategy,human factors,product design,anthropometric measurement

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流动性陷阱:现实、产生机理与政策

四川大学学报（哲学社会科学版） 2009年第6期 83-89页

作者：雷国胜西南交通大学人文学院四川成都610031

流动性陷阱限制了中央银行利率工具的使用并极易诱发严重的经济金融问题。探讨流动性陷阱产生机理的一种新解释,提出如果货币当局长期执行以泰勒规则为代表的反通胀战略以稳定真实利率的货币政策,通胀预期的变动会对通货膨胀产生超调,... 详细信息

流动性陷阱限制了中央银行利率工具的使用并极易诱发严重的经济金融问题。探讨流动性陷阱产生机理的一种新解释,提出如果货币当局长期执行以泰勒规则为代表的反通胀战略以稳定真实利率的货币政策,通胀预期的变动会对通货膨胀产生超调,形成爆炸性路径,最终名义利率降到流动性陷阱水平。根据这种产生机理提出着眼于真实经济的逃离流动性陷阱的政策建议。

关键词：流动性陷阱货币政策泰勒规则

Stability of Radial Basis Collocation Method for Transient Dynamics

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Journal of Shanghai jiaotong university(science) 2010年第5期15卷 615-621页

作者：罗汉中陈俊贤胡馨云黄醒春 school of Naval Architecture Ocean and Civil EngineeringShanghai Jiaotong University Civil and environmental engineering Department University of CaliforniaLos Angeles (UCLA)los Angeles 90024United States Mathematics Department Tunghai University

Strong form collocation with radial basis approximation is introduced for the numerical solution of transient *** Neumann stability analysis of this radial basis collocation method is performed to obtain the stability conditions for second order wave equation with central difference temporal *** shape parameter of the radial basis functions not only has strong influence on the spatial stability and accuracy,but also has profound influence on the temporal *** studies are conducted and show reasonable agreement with stability *** of selecting shape parameters as well as spatial discretization for solution stability are also presented.

关键词： radial basis collocation method (RBCM) stability analysis von Neumann method

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最小二乘超球多类支持向量机

系统仿真学报 2009年第23期21卷 7468-7472页

作者：徐图西南交通大学信息科学与技术学院成都610031

超球体多类支持向量机(HSMC-SVM)是一种直接型多类分类器,具有训练速度快,检测效率高的优点,但由于HSMC-SVM使用一阶范数软间隔作为目标函数的惩罚项,使得其训练精度受到一定影响,为了提高HSMC-SVM训练精度,将最小二乘法引入到HSMC-SVM... 详细信息

超球体多类支持向量机(HSMC-SVM)是一种直接型多类分类器,具有训练速度快,检测效率高的优点,但由于HSMC-SVM使用一阶范数软间隔作为目标函数的惩罚项,使得其训练精度受到一定影响,为了提高HSMC-SVM训练精度,将最小二乘法引入到HSMC-SVM中,提出了最小二乘超球多类支持向量机(LSHS-MCSVM)的概念,并且分析了它的训练算法和判决规则,从而形成了完整的LSHS-MCSVM分类理论。实验表明,LSHS-MCSVM无论在训练速度上还是在泛化性能上都要优于HSMC-SVM,适合于分类类别多,样本数量大的多分类场合。

关键词：支持向量机多类支持向量机 SMO训练算法工作集选择最小二乘超球多类支持向量机

Realizing profits immediately:disposition effect of open-end fund investors in china

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Journal of Southeast university(English Edition) 2008年第S1期24卷 180-186页

作者： Li Yajing1 Zhu Hongquan2 Luan Mingjing2(1 school of Economics and Management, university of Electronic science and Technology of {3.,chengdu 610054, {3.)(2 school of Economics and Management, southwest jiaotong university, chengdu 61003., {3.)

This paper explores the disposition effect, the tendency of investors to hold losing investments too long and sell winning investments too soon, by analyzing a unique data set that consists of the buying and selling positions of open-end fund investors in china. Results show that investors' buying and selling behaviors are significantly affected by fund performance. The reasons that lie behind such results are mainly related to the non-persistence of fund performance. When fund performance is non-persistent, investors are not clear about the future returns on funds. So, investors, especially individual investors, would have to realize the profits on hand immediately. Meanwhile, fund investors are highly sensitive to fund age and loading fees, but not sensitive to management fees charged by funds when they buy or sell fund shares.

关键词： investors open-end fund disposition effect fund shares

Cournot Model of Multidimensional Game with Incomplete Information and Its Equilibrium Analysis

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Cournot Model of Multidimensional Game with Incomplete Infor...

The Fourth International Conference on Systems science and Systems engineering(ICSSSE’03.

作者： TAN De-qing school of Economics & Management,southwest jiaotong university,chengdu,61003..P.R.{3. LIU Guang-zhong school of Business & Management,sichuan university,chengdu,610064.P.R.{3.

The paper first discusses Cournot model of multidimensional game with Incomplete Information,then further analyzes that the Bayesian equilibrium strategy chosen by firms independently participating in game for each kind of product are inferior to the Bayesian equilibrium strategy chosen by firms participating in the multidimensional game when two firms take game for two kinds of product with substitution.

关键词： multidimensional game incomplete information Bayesian equilibrium substitution