期刊文献+
共找到2篇文章
< 1 >
每页显示 20 50 100
能力指标主观需求空间生成方法研究
1
作者 吴展燕 胡剑文 《指挥控制与仿真》 2024年第5期147-154,共8页
由于具有整体性、非线性、开放性、不确定性等特点,复杂系统中抽象问题无法通过建立仿真实验模型进行效能评估。为了使复杂系统的整体性和不确定性得到充分考虑,通过分析实验设计的内容和原则,以及证据理论的优势,研究三隶属度支持向量... 由于具有整体性、非线性、开放性、不确定性等特点,复杂系统中抽象问题无法通过建立仿真实验模型进行效能评估。为了使复杂系统的整体性和不确定性得到充分考虑,通过分析实验设计的内容和原则,以及证据理论的优势,研究三隶属度支持向量机模型,提出能力指标主观需求空间生成方法。以某型战斗机关键突防能力指标的效能分析为例,使用样本数据对模型进行了验证,表明该方法具备良好的应用前景。 展开更多
关键词 能力指标空间 主观需求空间 三隶属度支持向量机
下载PDF
Spatial Variation and Space Optimization of the Development of China’s Circular Economy
2
作者 Li Ning 《Chinese Journal of Population,Resources and Environment》 2012年第2期51-59,共9页
China's circular economy is still at the initial stage, whose development has many difficulties and problems requir- ing immediate resolution theoretically and practically. Due to the differences of regions on the sc... China's circular economy is still at the initial stage, whose development has many difficulties and problems requir- ing immediate resolution theoretically and practically. Due to the differences of regions on the scale of land, endowment of resources, economic basis and cultural background, the devel- opmental levels and capabilities of circular economy are inevi- tably different. Based on establishing the indicator system for assessing the developmental level of regional circular economy, spatial variation of China's circular economy is measured by the quantitative measurement using principal component analysis, and the existing problems are also analyzed and discussed. On one hand, the differences of the development capability of the circular economy of different provinces (cities) are profound in China; (!)Difference between the first category (strong) and the second category (relatively strong) is 1.1264 points. Difference between the second category and the third category (relatively weak) is 0.3867 points. Difference between the third category and the fourth category (weak) is 1.0238 points. Differencebetween the tlrst category and the tourtla category reaches up to 2.0869 points. Average difference between the area where the developmental level of circular economy is relatively strong and the area where the developmental level of circular economy is relatively weak is 1.3617 points. (~)The differences of the dis- tribution of the areas, with different development capability of circular economy, which are located in the three economic regions of China, are also profound. The regions with a relatively strong development capability of circular economy are mainly located in the eastern economic area, which account for 22.58% of the whole regions, while only account for 12.90% in the middle and western economic areas. On the contrary, the regions with a relatively weak development capability of circular economy account for 48.39% in the middle and western area, while ac- count for 16.13% in the eastern area. On the other hand, among regions with different development capability of circular econ- omy, the regions with a relatively weak development capability of circular economy are in a dominant position, which accountfor 64.52% of all the provinces (cities), which indicates that the development of the China's circular economy still has a long way to go. Though certain achievements have been made in the development of China's circular economy, in general, there are still some obstacles to be tacked in the development of China's circular economy which require the economic, legal and administrative methods. 展开更多
关键词 circular economy spatial variation space optimiza-tion China
下载PDF
上一页 1 下一页 到第
使用帮助 返回顶部