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地点因素对中国地带性土壤表层有机碳含量的影响(英文)
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作者 戴万宏 黄耀 《安徽师范大学学报(自然科学版)》 CAS 2006年第1期64-69,共6页
利用中国第二次土壤普查确定的886个典型地带性土种剖面资料,通过统计分析方法研究了地点因素(土纲、质地、海拔、酸碱度和土地利用方式)对地带性土壤表层有机碳含量的影响.结果表明,地点因素显著影响地带性土壤表层有机碳含量;地点因... 利用中国第二次土壤普查确定的886个典型地带性土种剖面资料,通过统计分析方法研究了地点因素(土纲、质地、海拔、酸碱度和土地利用方式)对地带性土壤表层有机碳含量的影响.结果表明,地点因素显著影响地带性土壤表层有机碳含量;地点因素对耕作土壤表层有机碳的影响明显强于非耕作土壤;地点因素分别解释耕作土壤和非耕作土壤表层有机碳含量变异的24.7%和48.5%.耕作土壤和非耕作土壤有机碳含量的主要控制因素有所不同. 展开更多
关键词 地点因素 土壤有机碳 地带性土壤 方差分析 典型相关分析
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The application of combined gravity and seismic data formation separation for revealing deep structure 被引量:2
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作者 WeiYan Yang Zhanjun 《Applied Geophysics》 SCIE CSCD 2006年第4期255-259,共5页
In some oilfields with 3D seismic data, the deeper structure cannot be observed due to poor quality deep seismic data. Layer stripping using both seismic and gravity data is a solution for this problem but it cannot g... In some oilfields with 3D seismic data, the deeper structure cannot be observed due to poor quality deep seismic data. Layer stripping using both seismic and gravity data is a solution for this problem but it cannot get satisfactory results because the horizontal variations in formation density are ignored. We present a variable-density formation separation technique to address this problem. Based on 3D seismic depth data and laterallyvariable density derived from 3D seismic velocity data, the upper formation gravity effect is calculated by forward modeling and removed from the Bouguer gravity. The formation-separated gravity anomaly with variable density is obtained, which mainly reflects the deeper geological structure. In block XX of North Africa, the shallow formations seismic data is excellent but the data at the top of basement is poor. The formation-separated gravity anomaly processed under the control of 3D seismic data fits well with the known seismic interpretation and wells. It makes the geological interpretation more reliable. 展开更多
关键词 Formation separation technique variable-density
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Influential Factors in Employment Location Selection Based on “Push-Pull” Migration Theory—A Case Study in Three Gorges Reservoir Area in China 被引量:10
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作者 XU Ding-de ZHANG Ji-fei +3 位作者 XIE Fang-ting LIU Shao-quan CAO Meng-tian LIU En-lai 《Journal of Mountain Science》 SCIE CSCD 2015年第6期1562-1581,共20页
In China, farmers employed in non-farm work have become important socio-economic actors, but few studies have examined the farmers' perspective in making their work location choices. Based on "push-pull"... In China, farmers employed in non-farm work have become important socio-economic actors, but few studies have examined the farmers' perspective in making their work location choices. Based on "push-pull" migration theory, this paper utilizes sectional data from a 2013 survey of farmers in China's Three Gorges Reservoir area to empirically analyze the factors influencing migrant workers' choice of employment location. The results indicate that 60.46% of laborers have migrated from their home province, whereas 39.54% have remained in their home province. Focusing on personal, household, and community characteristics—in addition to the economic characteristics of the sample counties—multinomial logistic regression models reveal that farmer-laborers' employment location decisions are influenced by their personal capital endowment(age, years of education and social networks), family structure(the number of laborers, elders, children and students), home village characteristics(location, economic development level and the degree of relief of the land) and home county economic development level. Notably, male and female laborers' location decisions reveal a converging trend, and their differences are not pronounced. Per capita arable land area has little influence on location decisions, whereas the educational level of laborers has a significant impact. The results differ significantly from those found in previous studies. 展开更多
关键词 Off-farm employment Location selection Migrants Push-Pull migration theory Three Gorges Reservoir region China
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A study of venue marketing mix for MICE industry in Thailand
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作者 Kaedsiri Jaroenwisan 《Chinese Business Review》 2010年第10期41-50,共10页
The objectives of the research are to determine the important factors and the performance factors of the attributes in selecting venues (particularly convention hotels and convention centers) through investigating t... The objectives of the research are to determine the important factors and the performance factors of the attributes in selecting venues (particularly convention hotels and convention centers) through investigating the meeting planners' set of needs and to identify factors and attributes relating to the venue marketing mix for MICE industry in Thailand. This paper has applied the hospitality and the tourism marketing mixes that are important to the MICE destination selection (particularly venues) for creating a new venue marketing mix. Therefore, the study is based on the importance levels of venue selection through each marketing mix factors including all attributes in the meeting planners' perspectives on behalf of their organizations, which will be able to reflect a set of their real needs that could bring about development of a venue marketing mix model that exclusively accommodates MICE organizers. The data was collected using self-administered questionnaires from 229 meeting planners. Statistically significant determinants of the meeting planners' overall importance levels indicated that in all of the 8 marketing mix factors (68 attributes), the people factor was perceived to be the most important factor. The package factor was perceived to have a moderate level of importance. The other factors perceived to be important included Product, Price, Place, Promotion, Physical evidence and Process. It is also found from the factor analysis that the new venue marketing mix contained 8 marketing mix factors with 61 attributes for venue business in Thailand. It is recommended from the research findings that venue management be more concerned with and focus on the attributes of the people factor. 展开更多
关键词 VENUE MICE marketing mix
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Features of gas geology and its main controlling factors in Pingxiang Mining Area, Jiangxi Province
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作者 ZHAO Zhi-gen YAN Jia-ping LIU Xing 《Journal of Coal Science & Engineering(China)》 2012年第3期271-275,共5页
Pingxiang Mining Area in Jiangxi Province is one of the major coal-producing areas and is prone to serious coal and gas outburst, therefore, it is of significance to research on gas geological features and its control... Pingxiang Mining Area in Jiangxi Province is one of the major coal-producing areas and is prone to serious coal and gas outburst, therefore, it is of significance to research on gas geological features and its controlling factors. Based on the analysis of gas data collected from geological exploration and coal mining, the research reveals that the features of gas geology vary significantly between west part and east part of Pingxiang Mining Area, and it is characterized by high gas mines with se- rious coal and gas outburst in the west part and low gas mines with no coal and gas outburst in the east part. The main controlling factors to gas geology are discussed, and the great difference of gas geology between west part and east part is the result of comprehensive effect by geological factors. Concerning the gas generation, the coal rank in the west part is higher than that in the east part, which is favorable to generate more gas in the west part than in the east part. Concerning the gas preservation, the structures are characterized by gliding nappe in the west part and by tectonic window in the east part, the surrounding rocks are characterized by poor permeability in the west part and comparatively good permeability in the east part, and the characteristics of coal rank and coal body structure are favorable to gas preservation in the west part and favorable to gas emission in the east part. 展开更多
关键词 Pingxiang Mining Area coal and gas outburst gliding nappe coal rank surrounding rock
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