Extension multi-factorial evaluation method was used in water quality early-earning in Yincungang River based on MATLAB. The results showed that water quality in summer was safe, while that in other three seasons were in pre-warning state with the order of winter>spring>autumn.

China's Tourism industry, especially international tourism, has expanded rapidly since its market-oriented economic reform started in 1978. There has been limited information regarding the trends and regional disparities. This paper examines the national trends of China's international tourism...

We investigate competition between traditional stock exchanges and new dark trading venues using an important difference in regulatory treatment. Securities and Exchange Commission required minimum pricing increments constrain some stock spreads, causing large limit order queues. Dark pools...