PM2.5 Density Prediction Based on a Two-Stage Rolling Forecast Model Using LightGBM

Wind Power Prediction Based on Cloud Model and GMDH Two-Stage Optimization Approach

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.670-671.1545 ◽

2014 ◽

Vol 670-671 ◽

pp. 1545-1549

Author(s):

Zhong Kang Wei ◽

Dun Nan Liu ◽

Yu Jie Xu ◽

Jing Xing ◽

Yan Ling Du

Keyword(s):

Wind Power ◽

Atmospheric Pressure ◽

Large Scale ◽

Wind Farm ◽

Cloud Model ◽

Forecast Model ◽

Optimization Approach ◽

Security Risk ◽

Power Prediction ◽

Two Stage

Currently, large scale of wind power grid-tied has brought great security risk on the grid. Accurate forecast of wind power is of vital importance. In this paper, a forecast method based on cloud model and GMDH two-stage optimization approach is proposed. Firstly, association rules between wind speed and different atmospheric pressure are mined, cloud model inference method is applied to get the data of wind power speed at next time. Then, many forecast methods were applied to acquire power forecast data at next time, furthermore, combination forecast model based on GMDH is acquired. Through analyzing historical data, different atmospheric pressure and generation power of some wind farm in Jibei, it is verified that this model, having high practical value, can improve the accuracy of power prediction.

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Two‐Stage Urban Runoff Forecast Model

Journal of Water Resources Planning and Management ◽

10.1061/(asce)0733-9496(1984)110:4(479) ◽

1984 ◽

Vol 110 (4) ◽

pp. 479-496 ◽

Cited By ~ 3

Author(s):

Gilles G. Patry ◽

Miguel A. Marino

Keyword(s):

Urban Runoff ◽

Forecast Model ◽

Two Stage ◽

Runoff Forecast

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Two-stage self-seeding method for preparation of single crystals of poly(phenylene sulfide)

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100153816 ◽

1989 ◽

Vol 47 ◽

pp. 368-369

Author(s):

Sengshiu Chung ◽

Peggy Cebe

Keyword(s):

Single Crystals ◽

High Performance ◽

Dilute Solution ◽

Two Stage ◽

Annealing Behavior ◽

High Performance Polymers ◽

Seeding Method ◽

Phenylene Sulfide

We are studying the crystallization and annealing behavior of high performance polymers, like poly(p-pheny1ene sulfide) PPS, and poly-(etheretherketone), PEEK. Our purpose is to determine whether PPS, which is similar in many ways to PEEK, undergoes reorganization during annealing. In an effort to address the issue of reorganization, we are studying solution grown single crystals of PPS as model materials.Observation of solution grown PPS crystals has been reported. Even from dilute solution, embrionic spherulites and aggregates were formed. We observe that these morphologies result when solutions containing uncrystallized polymer are cooled. To obtain samples of uniform single crystals, we have used two-stage self seeding and solution replacement techniques.

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