Seabed surveying is the basis of engineering development in shallow waters. At present, geophysical survey methods mainly utilize sonars for qualitative surveying, which requires calibration results found through situ drilling and sampling. Among them, parameters required designs are obtained from either tests or laboratory experiments soil samples retrieved drilling. However, experience onshor...

Coal rock massif hydro-treating methods accompanied by crack initiation and propagation under influence of injected fluid pressure applied for preventing gas-dynamic phenomena are studied in the article. The perspectives applying acoustic controlling process formation effective preventive measures also studied.

We consider a known variant of bin packing called cardinality constrained packing, also with constraints (BPCC). In this problem, there is parameter k≥2, and items rational sizes in [0,1] are to be packed into bins, such that no has more than k or total size larger 1. The goal minimize the number bins. A recently introduced concept, price clustering, deals inputs presented way they split cluste...