Modifying Bentonite and Attapulgite with on short chain quaternary ammonium compound ( QAC) tetramethylammonium ( TMA) has been done. The sorption of benzene homologues in simulated groundwater by TMA modified clays has been studied.

Quadrilateral Area Coordinate ( QAC) method is a new tool for developing 2D quadrilateral finite element models which are insensitive to mesh distortion. But this new system can not handle curved-side cases directly.

四边形面积坐标方法是一种构造二维四边形有限元模型的新工具，为解决单元网格畸变敏感问题提供了新途径，但是这种方法还不能直接模拟曲边网格的情况。

The effects of modifiers on the extraction of Co(ⅱ), Fe(ⅱ) and Mn(ⅱ) with quaternary ammonium chloride ( QAC) were investigated.

研究了改性剂对季铵盐萃取分离钴（Ⅱ）、铁（Ⅱ）、锰（Ⅱ）的影响。

Numerical examples show that the present scheme exhibits excellent performances in computation efficiency and accuracy when compared with the QAC element using numerical integration and the isoparametric element.

通过算例比较了面积坐标单刚解析式、数值积分方法以及等参元的计算效率和精度。结果表明基于面积坐标方法的单元刚度矩阵解析式在这两方面确实具有明显的优辨。

The following article is a review for the progress on the antiseptic resistance gene such as qac and merA.

文章对季胺类和重金属等消毒防腐剂耐药基因作一综述。

The new Quadrilateral Area Coordinate ( QAC) method is a powerful tool to construct 2D finite element models.

四边形面积坐标（QAC）方法是新近提出的构造二维有限元模型的工具。

Beijing Quality Assurance Centre of China Quality Control Association ( QAC)

北京中质协质量保证中心（QAC）

The Tectonic evolution of Qan Tang basin is expounded by means of studying magmatite, Layer distribution law, and sedimentary formation, with showing different type of basin made in different stage of evolution.

目的：探讨藏北羌塘盆地演化史。方法：对盆地的岩浆岩、区域地层分布规律及沉积建造进行研究，对羌塘盆地构造演化史进行追踪。

In the PCZ ( x) ceramics sintered at the 1200 ℃, the quality values ( Q) of PCZ ( 0.37) is highest at 0~ 150KHz, which is 109, but the change of the curvature of Q-f is greatest.

在1200℃烧结的PCZ（x）陶瓷中，以PCZ（0.37）陶瓷在0~150KHz范围内的品质因数最高，最大可达109。但是曲线的曲率变化最大。

The Application of Association Rules Mining in Aero-engine QAR Data

关联规则挖掘在航空发动机QAR数据中的应用

The research results are valuable to the theory and development of QAR data application.

总体的研究成果对于QAR数据的应用有一定的理论和应用价值。

Application of PCA based on kernel function in analysis of QAR data

基于核函数的PCA在QAR数据分析中的应用

Establishing the QAR Data Assurance System Based on Reliability Management Principle

建立具有可靠性管理思想的QAR数据保障机制

Investigations on Crystal Orientation and Growth Mechanism of Proustite Grown by Bridgman Method

下降法生长淡红银矿晶体定向与生长机理研究

A Theorem of Public Immovable Point on Q-G Space

一个Q&G空间上的公共不动点定理

Compared with traditional techniques that simply return related web pages or passages, this technique will greatly improve the preciseness of Question Answering System ( QAS).

而一些传统的做法，则是简单地返回相关网页或段落。同这些传统做法相比，这种做法大大提高了系统的准确性，更加方便、快捷、高效。

The exploitation of machine center on-line inspecting system is an imperative problem in the production practice and the critical technology to develop the system of CIMS/ QAS.

开发加工中心在线检测系统，既是企业生产实际中亟待解决的难题，也是开发CIMS/QAS系统中的关键技术。

Compared with traditional techniques, this technique will greatly improve the intelligence of Question Answering System ( QAS).

同传统做法相比，这种做法大大提高了系统的智能化。

In the end, this paper introduced the application of the algorithm in Question Answering System ( QAS).

最后，介绍了该算法在中文问答系统中的具体应用。

Automatic Question Answer System ( QAS) is a kind of high-powered software system based on Internet.

自动应答系统（QAS）是一种基于因特网的高性能软件系统。

According to these requirements, this thesis presents the structure and the specific design methods of the QAS system.

根据这些需求，本文给出了QAS系统的总体设计和具体实现方法。