Experimental study on detection of underground coal gasification cavity-growth by transient electromagnetic method;

Ecological safety pattern of spatial extension in Shenyang City;

Cooperative particle swarm optimization algorithm based on particle s spatial extension;

The new modes of ur-ban spatial extension of Hong Kongare discussed in planningperspective, urban spatial develop-ment strategy and functions of newtowns, taking global economic inte-gration as the background.

The study extracted urban boundary information in four periods in support of GIS,and analyzed the urban land spatial expansion process and its driving forces.

After measuring the rural-urban factor energy and synthetic energy of Wuxi in the years of 1984、1991、1997、2001、2005, we have found that the major orientation of urban spatial expansion does not stretch towards the direction of places of good locations and a superior urban nature but towards the direction of places of an obvious rural nature in the rural-urban fringes.

By the time-delay compensating of original data,a tempo-spatial expanded virtual sensor array is built by constructing a set of virtual correlative matrices which has the character of time shift rotational invariance,so a novel method for 2-Dimentional(2-D) Direction of Arrive(DOA) angle,Doppler frequency and relative time-delay estimation is proposed.

Research of landuse configuration and spatial expanding in Wuhan City;

Based on the rationale of information entropy and using diversity index, equilibrium degree, superiority degree and spatial expanding intensity, an analysis was made of the dynamic evolvement of the construction land structure of Chongzhou and Tianquan, two cities situated in the plain and mountainous regions of Sichuan Basin, respectively.