开采

After the dissertation of this paper, wish it can offer a reference to opencast working .

希望通过本文的论述，能为露天开采提供借鉴，起到参考的作用。

This technique, called opencast, was used for many metals.

这种技术称为露天开矿，被应用于许多金属的开采。

In order to make people realize the harms brought by opencast working more and take some effective prevention and cure steps, this text has do a particular dissertate.

为了进一步使人们了解到露天开采带来的危害并采取有效的防治措施，本文做了详细论述。

Based on geological model of deposits and by means of CAD method,the authors put forward the building method of layered opencast mining geological model, whose layers are composed of bench.

本文提出了在矿床地质模型的基础上，应用CAD技术。建立以台阶为单元的分层式矿床开采地质模型的方法。

The optimal step size equation is derived according to LMS algorithmic. In light of the fact that the position of the resource of working-noise changes frequently and the acoustic characteristic of coalseam varies with the proceeding of mining, the thesis models the change of response function by single delay estimation in DCT domain to raise the filtering capability.

论文在 叙述LMS算法原理基础之上推导了最佳收敛步长的求解公式，给出了DCT-LMS自适应算法；根据井下作业噪声源位置是经常变化的以及巷道声特性随开采进程而发生变化的特点，提出采用DCT域的延时估计提高井下作业噪声滤波性能。

The optimization method and computer program given in the paper has good referential value for the design of deep mining in china.

研究中使用的优化方法和开发的数值计算软件，对深部采矿开采设计的岩石力学优化有较大的参考价值。

Both companies have achieved very good results in this field, but the main activities were still mining and dressing the tungsten ore.

两家公司均在这一领域获得良好收益，但其主营业务仍为矿山开采和选矿。

Ogoniland is just a sliver of Shell's onshore oil fields, and the out-of-court settlement is unlikely to end the company's longstanding troubles in a volatile part of Nigeria that is even more violent now than it was back in the 1990s.

Ogoniland油田只是壳牌陆上油田的一小部分，庭外和解是不可能解决该公司在尼日利亚这个动荡不安的国家里长期以来遗留下的问题，而这些问题甚至比壳牌在20世纪90年代回到尼日利亚开采石油的时候更加严重。

Over the past few years the volume of raw materials it consumes per unit of output has risen sharply.

在过去的几年中，开采自然资源所带来的消耗飞速上升。

As far as Shendong is concemed, the miningregions in mines are located in 100m underground mainly. Shallow imbedding, thin solidsocks and loose-and-scattered sands overlie are their twical characters.

就神东公司的情况看，各矿开采区域大部分集中于埋深100M左右，埋藏浅、基岩薄、上覆厚松散砂层是其典型的赋存特征。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。