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Search Results: 1 - 10 of 14267 matches for " Jinghu Shen "
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Jilin Traffic Volume Impact Analysis on Economic Development  [PDF]
Yuanyuan Huang, Zhe Yin, Jinghu Shen
Open Journal of Business and Management (OJBM) , 2015, DOI: 10.4236/ojbm.2015.31012
Abstract: Since the reform and opening up, China’s transport development has made brilliant achievements and has a strong support for the rapid development of economy and society. In this paper, we collate, screen and analyze a total of 32-year data from 1980 to 2011 on traffic volume in Jilin Province, then we build a partial least squares regression model to the quantitatively predict and analyze the relations of transportation construction and economic development.
Research on Reliability of Knowledge-Updating in A Kind of Network Knowledge System  [PDF]
Jinghu Shen, Zhe Yin, Yun-fei Guo
Intelligent Information Management (IIM) , 2011, DOI: 10.4236/iim.2011.36026
Abstract: The definition of reliability of knowledge-updating in network knowledge resource management system (NKRM system for brief) has been given in this paper, which has important reference value to the evaluation of NKRM system. Besides, two kinds of models in NKRM system have been introduced. And one of the most common methods to improve reliability is the redundant technique. However, reliability and efficiency are inconsistent each other. By treating each knowledge as one part of the system, this paper proposes method of joint reserve of knowledge that may resolve this problem.
THE PROPAGATION CHARACTERISTICS OF INTERANNUAL LOW-FREQUENCY OSCILLATIONS IN THE TROPICAL AIR-SEA SYSTEM

Yan Jinghu,Chen Longxun,Wang Gu,

大气科学进展 , 1988,
Abstract: The time series of sea surface temperature (SST), sea level pressure (SLP), zonal wind (U) and total cloudiness (CA), for the period of 1950-1979, over a 8o×8o grid-point latitudinal belt between 32oS and 32oN are made from COADS (Comprehensive Ocean-Atmosphere Data Set). The time harmonic analysis and power spectra analysis show that there exist quasi-biennial oscillation (QBO), three and half years oscillation (SO), five and half years oscillation (FYO) and eleven years oscillation (EYO) in these time series. The main propagation characteristics of these interannual low-frequency oscillations are as follows:(1) The variance analysis of SST shows that there is an active region of QBO and SO (with maximum variance), coming from the southwestern part of the subtropical Pacific, stretching eastward up to the west coast of South America, and then northward to the eastern equatorial Pacific. The QBO and SO disturbances of SST follow the same route and cause the anomaly of SST (El Nino and period of cold water) in the eastern equatorial Pacific.(2) Either the QBO or SO of SST can cause El Nino events, although it is easier when they are situated in the same phase of warm water at the eastern equatorial Pacific. The FYO of SST seems to be a standing oscillation. It plays an important role on the formation of strong El Nino events or strong cold water events.(3) The QBO and SO of U propagate eastward along the equator. The origin of QBO and SO may at least be traced as far as the western Indian Ocean. While they propagate along the equator, it strengthens two times at 90oE and the western Pacific, respectively. Like SST, the FYO of U is somehow a standing oscillation.(4) The Oscillations of U have a good coupling relationship with those of SST, while they propagate. When the QBO and SO of SST move to the east side of the eastern equatorial Pacific, it is the time for the QBO and SO of U to enter into the east part of the western Pacific.It is clear that, when we do research work on the formation of El Nino events, our consideration would not be confined to the tropics, it should cover the subtropical region in the southern Pacific. The features of the circulation and other oceanic states in this area are very important to the El Nino events.
RETRACTED: Hemodynamic Features of Unruptured Cerebral Aneurysms before Rupture: A CFD Study  [PDF]
Hao Li, Ligang Chen, Changren Huang, Yong Jiang, Weifeng Wan, Jinghu Dong, Tangming Peng
Computational Molecular Bioscience (CMB) , 2015, DOI: 10.4236/cmb.2015.51002
Abstract: Short Retraction Notice The paper does not meet the standards of \"Computational Molecular Bioscience\". This article has been retracted to straighten the academic record. In making this decision the Editorial Board follows COPE's Retraction Guidelines. The aim is to promote the circulation of scientific research by offering an ideal research publication platform with due consideration of internationally accepted standards on publication ethics. The Editorial Board would like to extend its sincere apologies for any inconvenience this retraction may have caused. Editor guiding this retraction: Dr. Christo Z. Christov (EiC of CMB) The full retraction notice in PDF is preceding the original paper, which is marked \"RETRACTED\".
The Effects of Anomalous Snow Cover of the Tibetan Plateau on the Surface Heating
青藏高原积雪异常对高原地面加热的影响

Li Guo ping,Lu Jinghu,Jin Bingling,Bu Nima,
Li Guo ping
,Lu Jinghu,Jin Bingling,Bu Nima

大气科学进展 , 2001,
Abstract: On the basis of snow data and AWS (Automatic Weather Station) data obtained from the Tibetan Pla- teau in recent years (1993 to 1999), the features of sensible heat, latent heat and net long-wave radiations are estimated, and their variations in more-snow year (1997 / 1998) and less-snow year (1996 / 1997) are analyzed comparatively. The relationships between snow cover of the Tibetan Plateau and plateau's surface heating to the atmospheric heating are also discussed. The difference between more-snow and less-snow year in spring is remarkably larger than that in winter. Therefore, the effect of anomalous snow cover of the Tibetan Plateau in winter on the plateau heating appears more clearly in the following spring of anomalous snow cover.
ARIMA Model in the Application of Shanghai and Shenzhen Stock Index  [PDF]
Shichang Shen, Yue Shen
Applied Mathematics (AM) , 2016, DOI: 10.4236/am.2016.73016
Abstract: In the paper, based on the data of Shanghai and Shenzhen 300 stock index in 2011, the ARIMA model was established by using Eviews 6, and the historical trend of stock price was found out. The model was used to provide a reference for the investors.
Measurements for Urban Hinterland Area of Cities at Prefecture Level or above in China
中国地级以上城市腹地的测度分析

PAN Jinghu,SHI Peiji,DONG Xiaofeng,
潘竟虎
,石培基,董晓峰

地理学报 , 2008,
Abstract: Hinterland supplies resources for the economic activities of central cities, so the range and the quality of hinterland are very important to city's development. However, the existing hinterland delimitation models are not enough to explain and analyze the complexities of urban system in China for their lack of maneuverability and their limit to only one indicator. In this paper, complex components for calculating the urban synthetical scale value are selected, with consideration to the following five specific aspects, i.e., population, economy, commerce, traffic and government capability, and the value is calculated by means of principal component analysis. Then, China is divided into 338828 grids, the scale of which is 5 km ×5 km, with the support of ArcGIS software. The field-strength of each grid influenced by cities at prefecture level or above in China can also be calculated. Meanwhile, each grid is allocated to exclusive city in the light of "maximal field-strength choosing" principle, and then, the hinterland area of 283 cities at prefecture level or above in 2004 in China can be delimitated automatically. Finally, the coherence and difference between hinterland area and administrative division are studied by overlaying these areas with province boundaries in order to provide scientific basis for adjustment of administrative division and delimitation of urban economic region. Results show that (1) the difference of urban hinterland cities was obvious among the cities at prefecture level or above in China, and the concrete facts show that hinterland area of the western cities is larger than that of the eastern ones, in which the maximum hinterland area is 5488 times of the minimum one. (2) The relationships between urban hinterlands are identified as four types: coexistence, inclusion, semi-inclusion and competition. (3) The coincidence degree between urban hinterland areas and their administrative division is lower. On the basis of measurement and analysis for urban hinterland, a three-level zoning project of urban economic regions of the whole country is put forward. According to the project, the first-level division includes North Region, Middle-and-east Region and South Region; the second-level division includes 11 regions, which are North China, Northeast China, East China, Shandong, Fujian, Central China, South China, Southwest China, Tibet, Northwest China and Xinjiang; and the third-level division is comprised of 38 districts, which are named after cities at provincial capital level or above. The measurement results also indicate that application of GIS spatial analysis methods to delimitate urban hinterland is convenient, precise and feasible, which can be an alternative approach of urban economic region division and urban system planning.
Progress on Studies of Land Use/Land Cover Classification Systems
土地利用/土地覆被分类系统研究进展

ZHANG Jinghu,FENG Zhiming,JIANG Luguang,
张景华
,封志明,姜鲁光

资源科学 , 2011,
Abstract: Land use and land cover change (LUCC) is one of the most important aspects within the scope of global change. As a critical portion of LUCC study, classification of land use and land cover types not only affects the classification results, but also determines applications of relevant data. In the paper, studies of land use and land cover classification systems were reviewed. It could be concluded that the land use and land cover classification laid more emphasis on the land use classification before the 1970s. The land use classification system emphasized the differences between land functions and was mainly applied to land use inventory investigation and land use mapping. After then, the classification system based on land cover rapidly developed due to the development of satellite remote sensing and computer technology. This classification system emphasized the differences between land categories and was mainly applied to land cover change studies. The review shows that almost all current land use and land cover classification systems tend to be suitable only for a specific research purpose at a certain scale. The incompatibility amongst the current classification systems has resulted in numerous inconveniences and difficulties in the courses of aggregation, analysis, and sharing of land use and land cover data due to the absence of consistent standards. Therefore, a standardized classification system is extremely warranted. However, a universal classification system suitable for all kinds of research purposes is neither possible nor necessary. The reasons lie in that on the one hand, the minimum classification unit could be dependent on the mapping scale as well as the spatial resolution of remote sensing data; on the other hand, land use and land cover types of varying detailed degrees are required for different research purposes. Furthermore, it would be probable that some special land use and land cover types existed in specific regions, for example, the Qinghai-Tibet Plateau in China. At last, this review states that a standardized classification system should be hierarchically organized and could be extended. The land use and land cover types of higher hierarchy could be directly identified from remote sensing images without auxiliary information, which would make it convenient for data comparison and sharing. The land use and land cover types of lower hierarchy could be defined in terms of a specific study purpose, which could satisfy the specific study needs.
Analysis of Spatial and Temporal Patterns of Impervious Surfaces and Vegetation Covers in Lanzhou Based on the V-I-AP Model
基于V-I-AP模型的兰州市不透水面与植被盖度时空格局分析

PAN Jinghu,LI Xiaoxue,FENG Zhaodong,
潘竟虎
,李晓雪,冯兆东

资源科学 , 2010,
Abstract: Biophysical variables (e.g., vegetation abundance and impervious surface) play a key role in urban energy circulation, climatic change and energy balance studies. Retrieval of these variables with a broad range of spatial and temporal scales has become one of focuses in the field of quantitative remote sensing. The ratio of the imperviousness to the total area is considered a significant urban ecological index in the fields of urban hydrology, water pollution, urban vegetation mapping and so on. Satellite i...
A Decomposition Model and Analysis of Energy Consumption Intensity in China during 1995-2007 Based on Structural and Efficiency Contributions
1995年至2007年中国能源消费强度的分解模型及实证分析——基于结构份额和效率份额视角

LIU Jinghu,JIA Renan,TU Guoping,
刘静华
,贾仁安,涂国平

资源科学 , 2010,
Abstract: Based on the energy consumption intensity equation and the logarithmic mean weight Divisia (LMD) method, a decomposition model for China's three industrial energy consumption intensities was established, and was applied to quantify influences of energy efficiency and energy structure in China during the period 1995-2007. Effects of the contributions of the structure and efficiency of the energy consumption intensity for the coal, oil, and electricity, and for three industries on China's energy consumption intensity were systematically investigated. Results showed that the energy consumption efficiency for the secondary industry is the primary factor determining China's energy consumption. Coal consumption intensity showed a general consistent trend with the China's energy consumption intensity. On the basis of this, it is suggested that decreasing the energy efficiency of dominant energy-extensive industries in the secondary industry, technology advancement and further optimizing the economic structure can be considered in policy-making to decrease China's energy consumption intensity. It was concluded that: 1) the trend of energy consumption in China was increasing during the study period, and the proportion of the secondary industry was more than 76 percent. The secondary industry was the major energy consumption industry; 2) the energy consumption intensity in China was generally decreasing; 3) efficiency is a major factor affecting the energy intensity in China. The energy intensity efficiency of the secondary industry played a prominent role in the total energy intensity; 4) the trend of coal consumption intensity and the contribution of efficiency and structural factors were generally consistent with the trend of the total energy consumption intensity in China, illustrating that coal plays a fundamental role in energy consumption; and 5) effects of the primary industry can be negligible. To decrease the energy consumption intensity of China, some policies and suggestions are given as follows: 1) continually optimizing economic structure. It has been implied that the structural contribution was not significant, merely increasing the energy intensity to some degree, which is not in accordance with the realistic functions of structural adjustment in decreasing the energy intensity. It is suggested that the potential of economic structural adjustment to decrease energy intensity need to be increased; 2) technology advance is a major way of decreasing energy intensity. Improving the industry energy efficiency is an effective and direct way of decreasing energy intensity in China; 3) improving the energy efficiency of the secondary industry is the key to decrease energy intensity; and 4) specific energy intensity requires specific measures to realize energy structural optimization.
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