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Search Results: 1 - 10 of 63319 matches for " GAO Yuan-dong "
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Spatial econometric analysis of industrial structure of Chinese provinces

GAO Yuan-dong,CHEN Xun,

系统工程理论与实践 , 2010,
Abstract: 假设中国省域产业结构间存在空间依赖性,提出了研究产业结构变化的空间滞后模型和地理加权回归模型,分别在全域和局域内,对中国31个省域产业结构变化进行了空间计量回归.结果显示: 1)假设得以证实——省域产业结构间存在显著的空间依赖性;2)产业结构初始值、人均GDP等因素对产业结构变动的影响具有显著的空间变异现象,即这些因素对产业结构的影响依据区域不同存在显著差别.基于这两点,得出 主要结论:为推进省域产业结构的高级化,应将邻接省域产业结构状况加以考虑,作为一个系统整体分析;并且考虑到要素具有的空间变异性,针对不同区域确定主要影响因素分析研究.
The spatial effect of human capital and regional economic growth

GAO Yuan-dong,HUA Yong-jun,

地理研究 , 2012,
Abstract: The majority of literatures on the effect of human capital on regional economic growth neglect the spatial effect of human capital.Based on hypothesis of the physical capital externalities and the technological spatial interdependence between provinces,the paper introduces the spatial lagged term of variable into the model of Mankiw,Romer and Weil (1992)(MRW Model),develops a Spatial MRW Model,and conducts Fixed-effect Spatial Panel Estimation in the samples of the whole China,eastern China and western China,respectively.The empirical results approve the correctness of hypothesis and receive the following conclusion.The contribution of human capital and the spatial spillover effect of human capital on economic growth in China's eastern region is more than twice as that in China's western region,but they are statistically insignificant.
Simulation of dielectric resonator for high-Tc radio frequency superconducting quantum interference device

Gao Ji,Yang Tao,Ma Ping,Dai Yuan-Dong,

中国物理 B , 2010,
Abstract: Nowadays, the high-critical-temperature radio frequency superconducting quantum interference device (high-$T_{\rm c }$ rf SQUID) is usually coupled to a dielectric resonator that is a standard $10\times 10\times 1$~mm3 SrTiO$3 (STO) substrate with a YBa2Cu$3O$_{7 - \delta }$ (YBCO) thin-film flux focuser deposited on it. Recently, we have simulated a dielectric resonator for the high-$T_{\rm c }$ rf SQUID by using the ANSOFT High Frequency Structure Simulator (ANSOFT HFSS). We simulate the resonant frequency and the quality factor of our dielectric resonator when it is unloaded or matches a 50-$\Omega$ impedance. The simulation results are quite close to the practical measurements. Our study shows that ANSOFT HFSS is quite suitable for simulating the dielectric resonator used for the high-$Tc rf SQUID. Therefore, we think the ANSOFT HFSS can be very helpful for investigating the characteristics of dielectric resonators for high-$Tc rf SQUIDs.
Characteristics of dielectric resonators for high-transition-temperature radio frequency superconducting quantum interference devices

Gao Ji,Yang Tao,Ma Ping,Dai Yuan-Dong,

物理学报 , 2010,
Abstract: 介质谐振器是目前高温射频超导量子干涉器较常采用的一种高品质因数微波谐振器.它是由10 mm×10 mm×1 mm的SrTiO3(STO)标准衬底及覆盖在其上的YBa2Cu3O7-δ(YBCO)薄膜磁通聚焦器共同构成的.为探明磁通聚焦器构形对介质谐振器谐振频率的影响,本文采用Ansoft公司出品的HFSS高频结构仿真软件对磁通聚焦器构形不同的若干介质谐振器的谐振特性进行了仿真.结果表明:增大磁通聚焦器开
Characteristic parameters of electromagnetic signals from a human heart system

Liu Xin-Yuan,Pei Liu-Qing,Wang Yin,Zhang Su-Ming,Gao Hong-Lei,Dai Yuan-Dong,

中国物理 B , 2011,
Abstract: The electromagnetic field of a human heart system is a bioelectromagnetic field. Electrocardiography (ECG) and magnetocardiography (MCG) are both carriers of electromagnetic information about the cardiac system, and they are nonstationary signals. In this study, ECG and MCG data from healthy subjects are acquired; the MCG data are captured using a high-Tc radio frequency superconducting quantum interference device (HTc rf SQUIDs) and the QRS complexes in these data are analysed by the evolutionary spectrum analysis method. The results show that the quality factor Q and the central frequency fz of the QRS complex evolutionary spectrum are the characteristic parameters (CHPs) of ECG and MCG in the time-frequency domain. The confidence intervals of the mean values of the CHPs are estimated by the Student t distribution method in mathematical statistics. We believe that there are threshold ranges of the mean values of Q and fz for healthy subjects. We have postulated the following criterion: if the mean values of CHPs are in the proper ranges, the cardiac system is in a normal condition and it possesses the capability of homeostasis. In contrast, if the mean values of the CHPs do not lie in the proper ranges, the homeostasis of the cardiac system is lacking and some cardiac disease may follow. The results and procedure of MCG CHPs in the study afford a technological route for the application of HTc rf SQUIDs in cardiology.
Feasibility of Treatment of Micro-pollutant Water Polluted by Nitrobenzene with IBAC-Process

WANG Chen,MA Fang,SHAN Dan,YANG Ji-xian,LAN Yuan-dong,GAO Guo-wei,

环境科学 , 2007,
Abstract: The performance and feasibility of immobilization biological activated carbon (IBAC) were investigated to treat micro-pollutant water containing nitrobenzene. IBAC has been developed on the granular activated carbon by immobilization of selected and acclimated species of engineering bacteria to treat the micro-pollutant water containing nitrobenzene. The IBAC removal efficiencies for nitrobenzene, permanganate index, turbidity, UV, ammonia and nitrite were compared with granular activated carbon (GAC) process. Biological toxicity of influent and effluent of filter were determined. Amount of bacteria in carbon was measured when carbon filter was inoculated and circulated stably. The results showed that compared with GAC, it took short time for IABC to startup and recover to normal after impact burden. In addition, IBAC was more effective to treat micro-pollutants. In order to ensure security of drinking water, the influent nitrobenzene should be controlled below 26 microg/L. Effluent biological toxicity treated with IBAC was less than that with GAC. The performance of IBAC was much better than that of GAC. Amount of bacteria in both activated carbon filter increased first and then declined from inlet to outlet.
Soliton excitations of one-dimensional Bose-Hubbard model

Xie Yuan-Dong,

物理学报 , 2012,
Abstract: One-dimensional Bose-Hubbard model is studied in detail. Soliton solutions in infinite space is presented, The elliptic function wave solutions and its nenergy and effective mass are also found under the periodic boundary condition.
Analysis of Tracer Test Data in the Laugaland Geothermal Field, S-Iceland

ZHANG Yuan-Dong,WEI Jia-Hua,

中国科学院研究生院学报 , 2005,
Abstract: The temperature decline of production wells is a potential problem induced by reinjection.At Laugaland,in order to assess and predict the temperature changes resulting from reinjection,a tracer test was carried out as an effective tool for quantitatively studying the hydraulic connection between production and injection wells.The analysis of the tracer test data indicates that the connection between the injection well GN-1 and production well LWN-4 is fairly direct.Based on the tracer test,the reinjection-induced temperature decline of the production well LWN-4 was predicted under different hypotheses and production-reinjection scenarios.The calculated temperature decline is,however,a few degrees greater than the actual cooling observed.The discrepancy is mainly attributed to a drastic change in flow conditions because of reduced production since reinjection started.In addition,the major earthquakes in 2000 may also have influenced the flow-pattern in the reservoir at Laugaland.
TreeView Component and It''''s Application of Program Development in ASP.NET

ZHOU Shu-qin,ZHAO Yuan-dong,

计算机应用研究 , 2004,
Abstract: TreeView Component is used in organizing data widely .TreeView makes data hiberarchy clearness and operation convenience.The using methods of TreeVew are discussed ,combining example that I have developed, it is expatiated that application of TreeView Component combining database in ASP.NET program development.
Feature Selection Method Based on Improved Scatter Degree

LAN Yuan-Dong,DENG Hui-Fang,

计算机系统应用 , 2012,
Abstract: Dimension reduction is important in machine learning.The two methods of dimension reduction are feature extraction and feature selection.Scatter degree is one of the feature selection methods which attribute a degree of scattering for each feature.Features are selected that have higher scatter degree.In this paper,classification error has been reduced by considering other aspects in computing scatter degree.Experiments on UCI dataset show that improved scatter degree have a good performance on feature selection.
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