Mandarin tone is the patterns of pitch variation, so it may be acquired by pitch extraction.
声调是基频变化的模式，因此可通过基频提取来获取声调信息。
2
A method for forecasting daily gas load based on air temperature variation, namely temperature difference coefficient method is put forward, and the satisfactory forecasting result is acquired.
提出了基于气温变化的燃气日负荷预测方法——温差系数法，取得了较好的预测效果。
3
Experimental results show that the proposed OSS can offer the maximum shape variation with reserving the principal information and a unique local optimal shape is acquired after optimal searching.