For well-distributed points, nearest neighbor search is often near O(logn)O(\log n)O(logn) in practice. In the worst case (all points clustered tightly or along a line), it can degrade to O(n)O(n)O(n), but this is uncommon with typical spatial data.
The pre-solicitation released this week is not a request for proposals from industry—it states that a draft Request for Proposals is forthcoming. Rather, it seeks feedback from industry and interested stakeholders about an "objectives and requirements" document that outlines the goals of the Mars mission.
。爱思助手下载最新版本对此有专业解读
「我完全不知道是誰在主導它，」他當時說，「我不同意其中一些內容，也有些內容絕對荒謬又糟糕。」
Медведев вышел в финал турнира в Дубае17:59