The formation of substellar objects induced by the collision of protostellar disks

Simulations of a close encounter between two protostars, each surrounded by a relatively massive disk, resulted in the ejection of some of the disk material into a tidal tail. A portion of the tail condensed into an object with a mass in the range of 5 to 10 jovian masses. This mechanism may explain the existence of the single objects of substellar mass that have recently been discovered.     

早稻软盘旱育抛栽增产优势分析

早稻软盘旱育抛栽是改变传统耕作方式的最佳选择,它具有省工、省时、节本、增产潜力大等特点,易被农民接受.笔者时早稻软盘旱育抛栽的增产优势进行了分析.