Combining relative research work,the research status of complete coverage path planning methods for mobile robot at home and abroad was analyzed,compared,included and introduced in the(paper).

There are mainly two kinds of path planning methods for mobile robot: one is the point to point, the other is the complete coverage.

Cadastre management has had an important function in land management and realizing a complete coverage of cadastre management is imperative.

The algorithm guarantees complete coverage by repeating covering portion of the environment and setting the GATE grids.

Using distance transform approach guaranteed complete coverage,and reduced the repeat coverage by setting the gate grids.

The validity of EeRCCA in different network size and node density is verified,simulation results show that EeRCCA can guarantee complete coverage and connectivity and its performance of number of working nodes and coverage ratio is approximately equal to RBSS.

The design method of the orthogonal circular orbit satellite constellation supporting global coverage is studied.

The authors analyse and summarize fecesiblcy and probably of exploitation farmland evaporation water;At the same time,the effects of precipitation and evaporation to grain yield were investigated and field experiments ware conducted,with"left stubble non-tillage straw mulching for whole growing process"cultivated new technique.