期刊文献+
共找到3篇文章
< 1 >
每页显示 20 50 100
莱州湾南岸咸水入侵区土地利用/覆被变化驱动机理研究 被引量:23
1
作者 张祖陆 王琳 《地理科学》 CSCD 北大核心 2007年第1期40-44,共5页
借助于典型自相关模型分析,将众多变量归纳为少数几个综合变量,并分别就这些综合变量进行系统阐述。影响研究区土地利用变化的社会经济因素可以归纳为:人口增长、产业结构调整、工业发展与城镇化等综合指标,并分别对各不同影响因素进行... 借助于典型自相关模型分析,将众多变量归纳为少数几个综合变量,并分别就这些综合变量进行系统阐述。影响研究区土地利用变化的社会经济因素可以归纳为:人口增长、产业结构调整、工业发展与城镇化等综合指标,并分别对各不同影响因素进行阐述。在自然因素方面,咸水入侵与土地利用结构特征及其变化方向具有相关性,它是可以综合反映自然驱动因素的代表性因子。 展开更多
关键词 丧州湾南岸平原 土地利用/覆被变化 驱动因子 典型自相关 咸水入侵
下载PDF
Canonical Correlation Analysis on Natural Subsystem and Economic Subsystem——Taking the Eco-development of Hebei Province as an Example
2
作者 赵晓晓 张雯 马寨璞 《Agricultural Science & Technology》 CAS 2012年第8期1722-1726,1775,共6页
[Objective] This study aimed to provide referential basis for ecosystem study of Hebei Province in the new decade of 21st century, by investigating the correlation between natural subsystem and economic subsystem. [Me... [Objective] This study aimed to provide referential basis for ecosystem study of Hebei Province in the new decade of 21st century, by investigating the correlation between natural subsystem and economic subsystem. [Method] The correlation between natural subsystem and economic subsystem in ecosystem was discussed by means of the canonical correlation, and the correlation between variables was explored with statistical data. [Result] The canonical correlation between the two subsystems could be explained by three groups of typical variables, Le., the canonical correlation between crop production and consumption; the canonical correlation between agricultural crop production, aquaculture and scientific research development funds; and the canonical correlation between forest area and GDP per capita. With the growth of economy and revenue and the steady development of agricultural production, there are still some serious problems, including the change of residents consumption is out of proportion to its material consumption; the socio-economic development depends on consuming of forests more heavily, which destroy the balance between the economic growth and environmental protection. [Conclusion] The results provide referential basis for the ecosystem study of Hebei Province. 展开更多
关键词 Canonical correlation Economic subsystem Natural subsystem Urban ecology
下载PDF
Correlation between acne and Northwest dryness syndrome in Xinjiang autonomous region of China 被引量:1
3
作者 Yan Wang Xiaozhong Wang +6 位作者 Haiyan Yuan Jing Jing Huaike Chen Xiaohong Ren Lili Zhang Huitian Zhang Mingxin Zhou 《Journal of Traditional Chinese Medicine》 SCIE CAS CSCD 2013年第6期761-765,共5页
OBJECTIVE: To analyze the correlation between ac- he and Northwest dryness syndrome in the Xinji- ang region to provide an epidemiological founda- tion for the prevention and treatment of acne in the region. METHODS... OBJECTIVE: To analyze the correlation between ac- he and Northwest dryness syndrome in the Xinji- ang region to provide an epidemiological founda- tion for the prevention and treatment of acne in the region. METHODS: The correlations among acne, clinical syndromes of Northwest dryness syndrome, and Northwest dryness syndrome were evaluated using the syndrome fitness index and canonical correla- tion analysis. RESULTS: The ache group had a Northwest drynesssyndrome rate of 24.13%, and the control group 10.34% (χ2=7.733, P〈0.01). There was no significant difference in the fitness index for acne and for the sub-syndromes of Northwest dryness syndrome (P〉 0.05). The first canonical correlation coefficient was 0.5656 (P〈0.01). The acne-dependent variable group had the largest damp-heat syndrome load (0.8709), and the independent variable had the largest lung-heart-spleen pyretic dryness load (0.6766). CONCLUSION: Northwest dryness syndrome is a risk factor for ache in the Xinjiang region. Exoge- nous dryness and endogenous damp are frequent- ly seen as subsyndromes in Northwest dryness syn- drome in acne patients in the region. Acne was cor- related with the damp-heat and lung-heart-spleen pyretic dryness sub-syndromes of Northwest dry- ness syndrome. 展开更多
关键词 Acneiform eruptions Exogenous dry-ness syndrome Northwest China CORRELATION
原文传递
上一页 1 下一页 到第
使用帮助 返回顶部