所以Bottom-Up所体现的思想即为低层次特征对高层次特征的组合,而Top-Down所体现的即为高层次特征对低层次特征的指导(可以举例为:人的鼻子和猴子的鼻子显然是不同的,但仅从该层次下而言可能二者鼻子的结构极其相似,那么我们在知道高层次特征:人/猴后,一定程度上自然可以指导区分低层次表征:人的鼻子/猴的鼻子)。 ...
Top down and bottom up data analysis and profiling is best done in concert because:自上而下和自下而上的数据分析及剖析应该一同处理,因为::()?(A)It gives something for the architects to do while the profilers get on with the work.当架构师在进行剖析工作时,它们将会持续提供一些材料给予架构师...
Top-downBottom-upNMRA strategy for the comprehensive analysis of low molecular weight (LMW) heparins is described that relies on using an integrated top-down and bottom-up approach. Liquid chromatography-mass spectrometry, an essential component of this approach, is rapid, robust, and amenable ...
在Bottom up自下而上的蛋白质组学中,蛋白质在进入质谱分析之前需要先被消化成肽段,而Top down自上而下的蛋白质组学则通过分离技术(例如液相色谱或2-D凝胶电泳)从复杂的生物样品中分离完整的蛋白质,然后进行MS分析。通过电喷雾电离(ESI)或基质辅助激光解吸电离(MALDI)等软电离方法,通过多种解离方法产生碎片后会产...
Which of DreschlerW's points com paring top-down analysis and bottom・up analysis is the most accurate? His point regarding:[单选题] A. estimates coming out of a recession. B. consistency of the results* C. detecting cyclical turns. 相关知识点: ...
Generally, while top-down and bottom-up can be very distinctly different, both are often used in all types offinancial approacheslike checks and balances. For example, while a top-down investment fund might primarily focus on investing according to macro trends, it will still look at the funda...
在Bottom up自下而上的蛋白质组学中，蛋白质在进入质谱分析之前需要先被消化成肽段，而Top down自上而下的蛋白质组学则通过分离技术（例如液相色谱或2-D凝胶电泳）从复杂的生物样品中分离完整的蛋白质，然后进行MS分析。通过电喷雾电离（ESI）或基质辅助激光解吸电离（MALDI）等软电离方法，通过多种解离方法产生...
“Top-down”是听者根据上下语境去猜测听到的大致内容;“Bottom-up”指的是从单个的词汇开始逐个记录,直到获取整个句子的含义。总体上来说,“Top-down”听力策略更适用于英语水平较高的学习者,因为他们已经能比较轻松地识别大部分的常用词汇;而“Bottom-up”听力策略则对英语水平较低的学习者有很大帮助,可以为他们...
Top-down investing involves looking at big picture economic factors to make investment decisions, while bottom-up investing looks at company-specific fundamentals like financials,supply and demand, and the kinds of goods and services offered by a company. While there are advantages to both methodologi...
Interprocedural static analyses are broadly classified into top-down and bottom-up, depending upon how they compute, instantiate, and reuse procedure summaries. Both kinds of analyses are challenging to scale: top-down analyses are hindered by ineffective reuse of summaries whereas bottom-up analyses ...