1) Relative change of cultivated land
耕地相对变化率
2) relative change rate
相对变化率
1.
This paper also investigates the trends degree and relative change rate of rural residential land.
重点探讨了济南市及各县(市)2000~2008年农村居民点用地变化的动态度和相对变化率。
3) cultivated land change
耕地变化
1.
Cultivated land change and farm household economic behavior response in gully region of loess hilly area;
黄土丘陵区耕地变化与农户经济行为响应
2.
Taking Chongqing as a case and using statistic data,the cultivated land change and its driving forces were analyzed using the principal component analysis in SPSS software.
以统计数据为基础,分析了重庆市的耕地变化情况,研究结果表明:该市耕地自1980年后呈先略有增加后逐年下降趋势,但减少速度呈先小后大再降低而后增加又降低变化规律。
3.
Correlation analysis between cultivated land changes and economic development .
根据1997~2004年耕地变更调查及其它统计数据,研究了重庆市耕地资源特征,分析了重庆市直辖以来耕地面积变化过程及区域差异,并定量分析了重庆市耕地变化和经济发展的关系。
4) changes of cultivated land
耕地变化
1.
Changes of cultivated land in Hebei province from 1953 to 2004 were analyzed based on mathematics statistics method.
应用数学统计方法,对55年来河北省耕地变化进行了分析。
2.
By analyzing the dynamic changes of cultivated land in Jiuquan City,it was found that the factors of influencing the cultivated land changes were the natural and economic factors.
通过对酒泉市耕地的动态变化分析,得出影响酒泉市耕地变化的因素是自然因素和社会经济因素。
5) change of cultivated land
耕地变化
1.
GDP growth and change of cultivated land based on EMD in Shandong Province;
基于EMD的山东省GDP增长与耕地变化的关系
2.
Change of cultivated land area reflects the development level of society and economy, which has an important impact on security of grain.
利用四川省及省域范围内的21个市、地、州1952年～2000年的耕地变化数据和经济社会发展数据,应用因子分析方法全面分析了影响耕地变化的经济、社会等主要因素,对四川省近50年的耕地面积变化的驱动力进行了研究。
3.
Change of cultivated land is core of land cover change.
耕地变化是区域土地利用变化的核心,其变化和流向反映了社会经济的基本态势。
6) farmland changes
耕地变化
1.
In China, the relationship between urbanization development and farmland changes is always a focus of studies.
在我国,城市化发展与耕地变化之间的关系一直以来就是人们研究的热点问题,不少专家和学者从不同角度进行了深入的研究。
2.
Most of the former studies showed that there was a negative relationship between economic development and farmland changes, but this paper analyzed it discriminatingly based on the positive studies on Jiangsu Province and then had a further cognition about this problem,namely, economi development did not only the negative effects on farmland changes, but also a positive ones.
一直以来,对于经济发展与耕地变化间的关系问题,许多学者都认为两者是负相关的关系。
补充资料：变化率限制器
分子式：
CAS号：
性质：又称速率限制器或变化率限制器。当输入信号的变化率在预设定的变化率以下时，输出信号等于输入信号。如果输入信号的变化率超过设定值时，输出信号的变化被抑制在预先设定的变化率。当输入信号的变化率回复到设定的变化率以下时，则输出信号亦恢复到仍等于输入信号。
CAS号：
性质：又称速率限制器或变化率限制器。当输入信号的变化率在预设定的变化率以下时，输出信号等于输入信号。如果输入信号的变化率超过设定值时，输出信号的变化被抑制在预先设定的变化率。当输入信号的变化率回复到设定的变化率以下时，则输出信号亦恢复到仍等于输入信号。
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条