Phone Number:( +86)188-1173-9817 

Email:zanghf@163.com

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Research Interest: International Trade and Economics, Technology Spillovers, Welfare, Text Analysis, Machine Learning, Deep Learning, Content Extraction, Remote sensor data processing,agricultural Economics, Enviromental Economics,NDVI, etc.

Teaching Interests: International Trade and Economics, Technology Diffusion and Adaptation, Macroeconomics.

A computer program is said to learn from experience E with respect to some class of tasks  T and performance measure P if its performance at  tasks in T, as measured by P, improves with experience E. 

A language isn't something you learn so much as something you join.

—Arika Okrent

“We are much better at writing code than haiku.”

— Matt Mullenweg, founder of Automattic 

"you shall know a word by the company it keeps."

                                                                            --J.R.Firth,1957

The distribution of natural images is complicated. Perhaps it is something like BEER FOAM,which is mostly empty but contains a thin mesh-work of fluid which fills the space and occupies almost no volume. The fluid region images which are natural in character. 

                                            [Ruderman,1996]

自然图像的分布很复杂。也许它就像啤酒泡沫，它大部分是空的，但含有一种薄薄的网状液体，充满了空间，几乎不占用任何体积。具有自然性质的流体区域图像。 

Spatiotemporal correlations ：

”All attribute values on a geographic surface are related to each other, but closer values are more strongly related than more distant ones." 

------- Tobler's First Law

temporal correlations:

some attributes of surface features will change periodically or non-periodically with time. those continuous changes form temporal correlation. The shorter the interval time is, the closer the ground properties are . 

--- a lecturer in a meeting