查询词典 mining

It exerts important significance on sci-tech history of mining and smelting and historical culture research, since this mine is one of a few rare mines in China that are qualified to restore the technique scenes of "decrepitating method" mining and "cupellation method" smelting.

公园拥有诸多采矿遗址，其中黄岩坑古矿硐规模最大，保存最完整，古代文献记载最丰富详实，是国内稀有的有条件恢复"烧爆法"采矿、"灰吹法"冶炼工艺场景的矿山，对矿冶科技史和历史文化研究具有重要意义。

The paper discussed release possibility of toxic and harmful elements during gold mining.It presented the major envi-ronmental problems that are cyanidation setups and Acid Mine drainage during gold mining.

本文主要对金矿开采中有毒有害元素的释放进行了探讨，明确了在金矿开采过程中主要的环境问题是氰化物堆浸和酸性矿坑排水问题。

Work in this paper focuses on the data mining from chromatographic retention index data. A retention index database that contains about 50000 records of retention index is firstly established. Projection pursuit technique is then utilized to do data mining upon the data in order to find out some valuable information about the relationship between the retention indices and structural descriptors. A novel algorithm for projection pursuit is developed in this work. Samples of alkane, alkene and cycloalkane are investigated.

中文题名化学数据挖掘新算法和定量构性关系基础研究副题名外文题名 New methodology in chemical data mining and foundational research on QSPR 论文作者杜一平导师梁逸曾学科专业分析化学研究领域\研究方向化学计量学学位级别博士学位授予单位湖南大学学位授予日期2002 论文页码总数115页关键词定量构性关系化学计量学数据挖掘馆藏号BSLW /2003 /O6 /2 化学数据挖掘正逐渐引起化学家们的关注。

The policy decisions were worked out on the basis of the digital elevation model, analysis of space, use of space database technology and theory of policy decision system, preserved space data of subsidence area of mining district and data experience of land reclamation, so as to acquire the rational land reclamation plans of the mining district and to provide information for environment evaluation.

从矿区塌陷坑的数字高程模型入手，通过空间分析，利用空间数据库技术和决策系统理论，保存矿区塌陷坑空间数据和土地复垦经验数据来进行决策，以期取得科学合理的矿区土地复垦方案，并且可为环境评价提供信息。

In order to make good use of the advanced technology of data mining, two kinds of classifiers (C4.5 decision tree and support vector machine, SVM) from data mining are improved.

3为了有效地利用数据挖掘的先进技术，对数据挖掘中两种分类方法C4.5决策树以及SVM进行了改进。

China is eager to address one of the primary culprits behind its alarming coal mining fatalities, as evidenced by the Pre-Mining Degasification Symposium held in South China's Guizhou province on March 31st and April 1st.

中国是急于解决的一个主要元凶，其惊人采煤死亡证明，由前矿业脱气研讨会在华南的贵州省3月31日和4月1日。

The lowering of mining dilution ratio and loss ratio is one of major difficulties in front of mining researchers.

采矿贫化率与损失率的降低是采矿工作者重点研究和攻克的难点之一。

That is to say, there appears a new direction in data mining field: visual data mining.

因此，数据挖掘领域中产生了一个新的方向：可视化数据挖掘。

The article first discusses the related concepts and basic method of data mining. The task of data mining is to find mode from database. The mode can be many , we can dispart two according to function: predictive mode and descriptive mode.

文章首先论述了数据挖掘的相关概念以及数据挖掘的基本方法，数据挖掘的任务是从数据集中发现模式，模式可以有很多种，按功能可分为两大类：预测型模式和描述型模式。

Mining concept drifts from data streams is one of the most important fields in data mining.

摘要数据流中概念漂移的检测是当前数据挖掘领域的重要研究分支，近年来得到了广泛的关注。

Objective:To compare the response control and attention of Schizophrenic patients with that of the healthy controls by Integrated Visual and Auditorycontinuous performance test. To quantitate the impairment of cognitive function in patients, and to explore the relationship between cognitive function and the severity of the disorder.

目的：探讨精神分裂症病人在IVA持续操作测试中的反应控制能力、注意力等，并与健康人进行比较，从而量化精神分裂症病人的认知功能损害，并进一步探讨其认知功能与疾病严重程度的关系。

Main effective factors including subcooling degree, mechanical vibration, gas hydrate reformation, environment temperature, noncondensing gas and surfactant are analyzed.

指出过冷度、机械振动、重复生成水合物、环境温度、不凝性气体、添加剂是影响气体水合物生成的主要因素，还对R152a水合物的放冷进行了实验研究。