We report the surface electronic structure of niobium phosphide NbP single crystal on(001) surface by vacuum ultraviolet......

Calibrations between sodium (Na+) concentrations from a Mt. Logan ice core and sea level pressure (SLP) series show that......

Given the conditions of residual coal from the boundary of a flat dipping open-pit mine,which uses strip areas mining an......

随着现代经济的发展,加快建筑业转型,推进工程总承包模式成为工程建设行业现阶段必须面对的问题。根据对现有的政策和行业环境,从......

本文阐述了透视仿射对应法的基本概念,确立的条件、性质、主方向及圆的透视仿射对应图形椭圆等方面问题。列举了利用此法解画法几......