1) Verhulst inverse function model
Verhulst反函数模型
1.
It is a key problem to select the initial prediction time t0 with Verhulst inverse function model in landslide study.
Verhulst反函数模型用于滑坡预测的关键在于起始预测时刻t0的选择。
2) Verhulst model
Verhulst模型
1.
The application of Gray GM(1,1) model and Verhulst model in the forecast of farmland in the karst area——A case in Bijie ecological experimental area
灰色GM(1,1)模型和Verhulst模型在喀斯特地区耕地预测中的应用——以毕节生态试验区为例
2.
According to combined theory with optimum weight and taking the deformation data of some landslide as an example,the combined model with optimum weight is established on the basis of establishing Verhulst model,trend curve predicting model of the landslide.
根据最优加权组合理论,以某滑坡的变形监测资料为例,在建立Verhulst模型和趋势曲线预测模型的基础上,建立了滑坡变形的最优加权组合模型。
3.
The grey Verhulst model and cubic exponential smoothing model are built respectively based on the analyses of income level of urban residents of Shaanxi province in order to improve the predictive precisions of income level of urban residents.
为提高城镇居民收入水平的预测精度,在对陕西省城镇居民收入水平现状进行了分析的基础上分别建立了灰色Verhulst模型和三次指数平滑模型。
4) grey Verhulst model
灰色Verhulst模型
1.
Unbiased grey Verhulst model and its application
无偏灰色Verhulst模型及其应用
2.
To meet the need of the monitoring and early-warning to the safety of the network system within the oppositional environment,this paper proposed a situation awareness model for the network security based on the unequal interval grey Verhulst model with residual correction.
由非等时距的原始采样风险数据序列入手,根据累加序列所呈现出"S"形或反"S"形的摆动特征,选用灰色Verhulst模型或其反函数模型预测出网络未来的风险值,然后基于多级残差对模型的预测精度进行修正,最后应用修正后的新模型得到直观的网络未来安全态势曲线图。
3.
Grey Verhulst Model is introduced into the research of land subsidence in this paper.
本文将灰色Verhulst模型引入地面沉降的研究之中,根据某地面沉降观测点的近20年数据建立地面沉降发展模型,并运用所建立的模型对地面沉降的发展态势进行了预测。
5) verhulst grey model
Verhulst灰色模型
6) Grey remnant Verhulst model
残差Verhulst模型
1.
First diffusion characteristics of innovational product are discussed and Grey remnant Verhulst model and Grey optimal Verhulst model are established and then the two optimal models with Bass model in accuracy of simulation are compared based on a case.
依据创新产品的扩散特性,建立了残差Verhulst模型及优化Verhulst模型,通过实例对Bass模型、残差Verhulst模型及优化Verhulst模型的模拟精度进行比较,发现残差Verhulst模型模拟精度较
补充资料：反余弦函数
函数y=cosx(x∈[0,π])的反函数叫做反余弦函数，记作y=arccosx.
符号arccosx(|x|≤1)表示属于[0,π]的唯一确定的一个角，这个角的余弦恰好等于x.
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