Results 121 to 130 of about 4,833 (164)

基于VMD-LSSVM的碳交易价格预测方法

open access: yesGaoya dianqi
在对碳交易价格进行预测时,如何考虑在保证预测精度的同时提高预测效率是目前亟需解决的问题。针对该问题,文中考虑到现有预测方法中的碳价序列存在模态混叠问题和预测模型求解复杂的情况。从而提出一种基于VMD-LSSVM(variational mode decomposition-least squares support vector machine)的碳交易价格预测方法。首先,利用VMD算法将历史碳价样本序列分解为频率不同的碳价分量;其次,建立LSSVM模型并对分解后的各个碳价分量进行预测;最后 ...
母欢欢   +5 more
doaj  

[Impact of ultrasonic scaling on abutment screw torque in implant restorations]. [PDF]

open access: yesBeijing Da Xue Xue Bao Yi Xue Ban
Tang Y, Zhao X, Yang X, Jia H, Liu Y.
europepmc   +1 more source

[Pathogen Profile and Risk Factors for Hospital-Acquired Infection in Stroke Patients]. [PDF]

open access: yesSichuan Da Xue Xue Bao Yi Xue Ban
Xu T   +6 more
europepmc   +1 more source

Home - About - Disclaimer - Privacy