休闲经济:21世纪初的主导经济

正在发生的全球信息化进程,将把人类的休闲提升到新的社会文明阶段,休闲将成为一种更为重要的社会资源。在全球信息化过程中的中国现代化,其发展目标不是传统工业化,而是现代工业化和步入信息社会发展阶段。伴随着人类社会的信息化进程,休闲经济将成社会的主导经济。休闲产业即使在工业社会也占据日益增大的份额,逐步发展为支柱产业,但在未来的社会信息化过程中,休闲经济在整个国民经济中的地位将发生根本性变化,即休闲经济产值在 GNP 中将占50%以上。

POSITIONAL ERROR CURVES BAND OF A PLANAR LINE SEGMENT WITHIN GISs

In this paper, the positional error curve of point features was extended to an error curves band of line segment features. Firstly, the constitution and shape of the error curves band were analyzed. On this basis, the general boundary curve formula of that band was derived. Secondly, the visualizing error curves bands were realized through three exam- ples. Finally,area index has been examined by comparing numerical results from error curves band and error ellipes band.

双休日·赎罪节及其它

实行新的工时制.双休日倍受国人欢迎。既能搁下五天的忙碌,又可纵情于各自的爱好,或料理家务、或逛于闹市、或轻歌曼舞,工作娱乐两相宜,煞是潇洒自在。