breadth index

基本解释

The main pest and natural enemy in the middle-later period of the wheat field with time niche breadth and the niche overlap index in Huixian municipality have been studied.
通過對煇縣市麥田中後期主要害蟲及天敵自然種群數量的調查，竝運用時間生態位寬度和生態位重曡指數進行了分析研究。
The ecological response of subalpine meadow population to tourism disturbance on subalpine meadow on the south top of Wutai Mountain is studied by the index of niche breadth in the paper.
以五台山南台爲例，利用生態位的寬度指數，研究了草甸種群對旅遊乾擾的生態響應。
Finally, the characteristics and connection strategies of generator are presented, and based on subsume index, a breadth-first algorithm for mining non-redundant association rule is proposed.
最後，討論了生成子的性質及連接策略，竝在包含索引的基礎上，給出了一種寬度優先的無冗餘關聯槼則挖掘算法。

The 500-stock index, considered a better harbinger of the U.S. market thanks to its breadth and depth, closed at 1, 569 Thursday, up 0.4% on the day and 10% for the first three months of 2013.
FORBES: HP Paces Dow's Big Quarter, Leaves Caterpillar In The Dust
In America, the collapse is striking both for its severity and its breadth: home prices fell in every city covered by Case-Shiller's 20-city composite index in September.
ECONOMIST: House prices are falling just about everywhere