Synthesis and applied research of rare-earth thioglycolate;

An efficient image compression algorithm based on sparse matrix;

Implementation of the Sparse Matrix Multiplication based on C++;

Improved algorithm of sparse matrix multiplying

Clutter characteristics of linear sparse array radar;

Ground moving target indicator(GMTI) using space-based sparse array is attractive.

This paper analyzes the effects of amplitued-phyase errors and element failure on antenna gain, beamwidth, beam direction, and sidelobe level in sparse array.

To achieve this goal, one way is to increase the element number of the array, but it will bring higher cost and more complexity with respect to the system; another way is to use sparse antenna array, whose element spacing is relatively larger thanλ/ 2, it has larger aperture without increasing the number of element, the sparse array can meet the design goal o.

A modified genetic algorithm is presented to optimize the element spacing of the nonuniform sparse array in this paper.

A synthesis technique for linear sparse arrays with optimization constraint of minimum element spacing;

The trends of the key technology by the follow ways,increasing bandwidth,the improvement of the power added efficiency of transmit/receive modules,the technology of phase shifter,digital circuit and the sparse arrays are discussed.

Compared with the synthesis method of thinned arrays,this new approach can exploit more degree of freedom of elements to control the characters of the sparse arrays.