abstraction [æb'strækʃən]

abstraction的基本解释

n.

抽象化, 心不在焉, 提炼, 抽象派作品, 提取

• He wore a look of abstraction.
• 他看上去出了神。

• The idea of redness is an abstraction.
• 红色概念是一种抽象概念。

• His abstraction was so deep that he did not eat for two days.
• 他极度心不在焉，以至于两天没吃东西。

• After the abstraction of the juice from the orange, only a tasteless pulp was left.
• 柳橙里的汁去掉后，只剩下不可口的肉了。

与abstraction相关的网络例句 [注：此内容来源于网络，仅供参考]

The authors extended the representing framework Rof the KRA model so as to divide the perception into primary perception and abstraction perception. In the process of primary perception,Wunder the primary perception system P is mapped as P where the attributes of the objects in Wdo not change. In the process of abstraction perception, Wunder the abstraction perception system P* is mapped as P*. The objects in P*are abstraction objects, the types of which are related to the abstraction objects database predefined by the agent.

针对KRA抽象模型的表示框架进行扩展，将感知过程分解为初步感知过程和抽象感知过程两部分：初步感知过程将该模型提供的一个框架R表示世界W在初步感知系统P的作用下映射为P，该过程不改变W中具体对象的实体属性；抽象感知过程将P在感知系统P*的作用下映射为P*， P*中的对象称为抽象对象，抽象对象的类型根据感知者预先定义的抽象对象库Oa的不同而不同。

The results of in situ DRIFTS on propylene oxidation show that the allyl species originated from α-H abstraction of propylene were located at the wavenumbers of 1454 cm~(-1) and 1427 cm~(-1). The rate-determining step is the abstraction of an α-H abstraction from a lattice oxygen linked to a bismuth ion to form a π-allyl intermediate coordinated to a molybdenum ion. The metal-oxo group then attacks the allyl intermediate forming a σ-bonded oxygen-allyl species, which is in a rapid equilibrium with the π- bonded species. The σ-bonded species then transforms to acrolein by further abstraction of α-H. Such species as formate, carboxylate, carbonate transform to deep oxidation products. The acetone was derived from propylene by an enolic species at lower temperatures.

丙烯氧化反应体系的原位漫反射红外光谱研究结果表明，由丙烯脱氢生成的烯丙基中间物种吸收峰在1454cm~(-1)和1427cm~(-1)处；基于此提出了较完整的丙烯氧化反应网络：丙烯选择氧化生成丙烯醛主要经历丙烯脱除甲基上的一个H，生成烯丙基物种，该物种嵌氧生成σ-O络合物，脱氢得到丙烯醛前驱体，脱附生成丙烯醛；完全氧化产物是由催化剂表面上生成甲酸盐、羧酸盐、碳酸盐等形式的中间物种转化而成；较低反应温度下丙烯氧化生成丙酮，通过烯醇式中间物种氧化生成丙酮前驱体得到。

Multiple-paths hydrogen abstraction reactions of fluorine -with CH_3OH have been investigated at the MP2/6-311 ++ g level. The potential energy surfaces for H-abstraction reaction from carbon atom and oxygen atom were given respectively. The results indicate that there is only one minimum energy path for hydrogen abstraction from carbon atom, while multiple paths were found for hydrogen abstraction from oxygen atom. All the stationary structures, frequencies as well as PES sketch of all channels were given, in which the dominant channel is by a five-member ring transition state. The calculated heat of reaction is 170.62 kj/mol for channel 1, 119.41 kJ/ mol for branch channel 6. The results are in good agreement with experimental data.

以MP2/6-311 ++g水平上详细研究了氟原子与甲醇抽氢反应的多通道反应机理，得到了各条通道中涉及的驻点的构型和振动频率及其能量，给出了两张完整的反应势能面，结果表明，氟原子从C原子上抽氢时有一条明显的最低能量通道，而从氧原子上抽氢时要涉及多条分支通道和多个驻点构型，给出了各分支通道势能面示意图，结果表明以形成五元环状过渡态通道为优势通道，计算得到经途径1生成CH_2OH时反应放热170.62kJ/mol，经分支途径6生成CH_3O自由基时反应放热119.4 kJ/mol，此结果与实验值一致。

与abstraction相关的网络解释 [注：此内容来源于网络，仅供参考]

abstraction：抽象

其实,"意"一方面与西方现当代艺术中的主要概念,比如"观念"(concept)、"抽象"(abstraction) 和"表现"(expression)等都有关,也就是它是表达理念(idea)的意思.

abstraction：抽象化

32经师虽然没有否认宗教经验的意义,而其专业或技术性地处理经典,难免逐渐倾向于知识主义而忽视经验,就是说,经学化的过程同时伴随著"抽象化"(abstraction)和"去脉络化"(decontextualization),把原始性的宗教经验还原为一般的宗教概念和范畴.

abstraction：提取

时间粒度(Granularity)的管理和时间提取(Abstraction)有一个称作KBTA(基于知识的时间提取 Knowledge-Based Temporal-Abstraction)的方法是提取时间标签数据的一般构架KBTA构架包括了时间和时间命题的理论模型,

abstraction：抽象性

虽然 C++ 对数组提供了内建支持,但是这份支持仅局限于对个别元素的读写而已.C++ 并未支 持数组的抽象性(abstraction);它也未支持我们可能希望对数组的所有操作,例如数组与数组之间的 赋值操作 (assignment) 两个数组之间的比较操作 ,

data abstraction：数据抽象

Bill Venners: 数据抽象(Data abstraction)就是独立的不使用继承的类?Bjarne Stroustrup: 差不多. 面向对象编程(Object-oriented programming)就是你使用继承的地方. 我以前曾经写过:"我们必须使容器(container)中的元素类型参数化" 后来这个相反就变成了generic programming.