In this paper, offered an improved method. With bottom-up control strategy, pre-process and segmentate an image, then extract the edge with a threshold algorithm.

With the development and application of various powerful experimental techniques, such as molecular self-assembly, mechanically controllable break junction and scanning tunneling microscope, fabricating functional molecular electronic devices by the bottom-up strategy becomes a hot research topic in molecular elctronics.

随着分子自组装技术、机械可控劈裂结方法以及扫描隧道显微术等实验手段的发展和应用，基于分子自身特性自下而上地构建具有特殊功能的分子器件成为当前分子电子学的研究热点。

Bottom-up strategy is like building a pyramid: it constructs upper-level concepts from basic components step by step until the whole concept of selected program is achieved.

自下而上方式是一种拼盘式方法，它从基本组件开始逐步组建上层概念，直至到达总体目标。

At the end of the day, it seems that some tool vendors have chosen the bottom-up strategy.

到目前为止，看起来一些工具厂商已经选择了自顶向下的策略。

Most existing reduction algorithms, which adopt a bottom-up strategy, can not guarantee their completeness.

现有大多数约简算法都采用自底向上的搜索策略，但不能保证算法的完备性。

The reading achievements of the thirty poor students correlate to bottom-up strategy use negatively.

30名差生的阅读成绩还与自下而上策略的使用呈负相关。

It is different from the available EA-based techniques mainly in that it uses a bottom-up search mechanism. The approach makes groups of examples evolved, and then rules are extracted from these groups of examples at the end of evolution.

它与现有进化分类方法的不同之处在于采用了一种自下而上的搜索机制，即先使若干样本的集合得到进化，再从进化结果中提取规则。

Hierarchical clustering method can be further classified into agglomerative and divisive hierarchical clustering, depending on whether the hierarchical decomposition is formed in a bottom-up or top-down fashion.

根据层次分解是自底向上还是自顶向下形成，层次聚类方法可以分为凝聚的（agglomerative）和分裂的（divisive）。

This step-by-step integration of components takes place in a bottom-up fashion, according to the order stipulated in the integration build plan.

这种一步步的组件集成发生在自下至上的方式中，并且按照集成构建计划规定的顺序进行。

In contrast to the validation phase, the measurement phase must happen in bottom-up fashion.

与验证阶段相反，度量阶段是自下而上的。

Especially we exploit the new modeling methodologies to fasten the behavioral simulation in the bottom-up verification of mixed-signal system.

特别是在混合信号系统自下而上的验证过程中，利用新的建模方法加速电路的行为级模拟。

In this paper, inspired by the findings in cognition psychology, we study the data competition in the bottom-up visual attention system and bring up a novel visual attention model based on the hierarchical competition.

结合认知心理学的相关发现，研究了由底向上视觉注意中的数据竞争问题，提出了一个新的基于层次竞争的视觉注意模型。

Based on the overall design program, adopt the approach of bottom-up to achieve system function step by step. After testing, the system operates steadily.

依据提出的总体设计方案，采用自下而上的方法逐层实现系统功能，经过测试系统运行基本稳定。

Hierarchical Data Competition in the Bottom-Up Visual Attention System

由底向上视觉注意中的层次性数据竞争

Two design strategies: "Top-Down" Analysis Method and "Bottom-Up" Analysis Method;

总体规划中运用的两种设计策略&由顶向下分析法和由下至上分析法；

This question enables a bottom up analysis of what type of organisation is required to serve those needs and what profit opportunities are available.

提出这个问题之后，我们就能进行反向分析，探讨哪种类型的机构才能满足这些需要，以及其中有什么获利机会。

A word of caution about bottom-up analysis: You have to be careful not to blindly expose existing IT capabilities.

对于自底向上的分析，有一句忠告：您必须谨慎从事，不要盲目地公开现有的IT功能。

Then, in this context, bottom-up analysis occurs to try and find matches for the required services ( meet-in-the-middle approach).

此后，会在这个上下文环境中进行自底向上的分析，试着为所需的服务找到与之匹配的项（中间相遇方法）。

Hence, a bottom-up analysis of these systems also has to be conducted in order to investigate wrapping and refactoring strategies.

因此，为了研究包装和重构策略，必须对这些系统进行自底向上的分析。

We described bottom-up analysis and the modeling of these external systems in terms of interfaces and components.

我们讨论了自底向上的分析以及对接口和组件的建模。

The process begins with a preliminary, bottom-up analysis using Microsoft Project.

这一处理过程首先使用Microsoft Project进行一个初步的、自底向上的分析。