The terrain complexity of mountain cities often limits the rational layout and agglomeration distribution of newly added urban land. To this end, this paper proposes an innovative urban growth boundary optimization model -- Pareto Frontier theory and Ball-Tree algorithm optimized model (SP-BT)....

Novel valve spring blocking structure for generating pulsed waterjet was proposed, which belonged to interrupted type and purposed using in petroleum drilling. The characteristics and rock breakage performances of the pulsed waterjet were studied through experiments by changing its structural...

Preface -- Introduction -- The unresolved deficiencies of the classical economic standard model and the failure of the theoretical model in practice -- Goods market -- Financial market -- Labor or service market -- The theory of the IS-LM curve and the IS-LM model -- Fundamental criticism of the...