英 [səˌlekˈtɪvəti] 美 [səˌlekˈtɪvəti]
n. 选择性;分离性;选择度
selectivity /sɪˌlɛkˈtɪvɪtɪ/
名词 the state or quality of being selective 选择性
the property of being selective
选择性-引用次数:305
This proposed method has the advantage of high selectivity and sensitivity. It is suitable for on-line analysis.
本方法具有较高的选择性和灵敏度,样品处理方法简单快速,适合于实时在线分析。
参考来源多壁碳纳米管修饰电极
选择率-引用次数:17
For query processing and optimization, it is one of important issues to estimate query selectivity, and histograms can be an effective tool for accurate query selectivity estimation.
查询选择率的估计是查询处理和优化的重要问题之一。
选择性
选择性-引用次数:221
择时能力-引用次数:17
选择性
选择性
...对功能亢进者用抑制药,使机体功能在药物效应的影响下达到新的动态平衡。二、药理作用的方式二、药理作用的方式药理效应选择性(selectivity)是指药物引起机体产生效应的范围的专一或广泛程度。药理效应的选择性受较多因素的影响,如在药物的剂量改变时可明显影响其效应范围...
...L执行的CPU、IO成本,主要标准; 2)Cardinality(基数):可以理解为表里数据量大小,当然越少越好; 3)Selectivity(选择度):即有多少行数据可以被挑选出来,当然越少越好; DB2优化器-优化级别 DB2优化器-优化级别选择 DB2优化器-默认级别 db2 connect ...
相关资料更多> (一)oracle单表选择率(selectivity) 运用Sqlite进行数据存储(二):使用SQLiteDatabase操作SQLite数据库 oracle中替一张表添加一个字段 给错误提示框加上中文的标题...
”查询就不会使用该索引。所以限制条件中包含先导列时,该限制条件才会使用该组合索引。可选择性(selectivity): 比较一下列中唯一键的数量和表中的行数,就可以判断该列的可选择性。
选择性;分离性;选择度
We haven't found any convincing evidence that selectivity or prestige matters.
我们还没有找到任何有说服力的证据来证明选择性或声望很重要。
Schools are tending towards greater selectivity.
学校对新生的选拔有趋严之势。
Selectivity is key to its success.
选择性是成功关键。
And all ion channels are selective for a single type of ion, and we can think about how that selectivity takes place, and that's where this idea of atomic radius is going to become very important.
所有的离子通道都是仅对某一种离子具有选择性的,而我们可以来想一想这种选择性是如何发生的,这也就是原子半径这个概念将会变得,非常重要的地方。
化学原理课程节选 : 麻省理工公开课
What all of these channels have is what's called a selectivity filter, so this filter filters out the type of ion that's going to be allowed through.
这些离子通道都有的一部分,就是所谓的选择性过滤器,这个过滤器,会滤过允许穿过的离子。
化学原理课程节选 : 麻省理工公开课
Our ears have only evolved to respond to sound with very high sensitivity and high selectivity.
人类的耳朵对声音的反应,极为敏感,也极有选择性。
7个颠覆你思想的演讲课程节选 : 斯坦福公开课
The New Yorker still practices a trademark brand of selectivity to set a particular tone.
Columbia, while the most dramatic in terms of increased selectivity, was certainly not alone this year.
FORBES: The Technology Revolution Changing College Admission
But the single factor that can show dramatic shifts in ranking in a single year is selectivity.
FORBES: The Technology Revolution Changing College Admission