查询词典 mining field

Rock mass deformation and failure in working face caused by underground mining lead to mining-induced fracture, which is the source of a series of mine disasters. The research on geophysical characteristics of mining-induced fracture rock mass and feasible geophysical techniques with high accuracy and resolution detection on mining-induced fracture rock mass are meaningful theoretically and practically for the safety of coal mines and the prevention of mining disasters.

地下矿床开采引起采场围岩变形破坏产生采动裂隙，采动裂隙是矿山一系列灾害的根源，研究矿山采动裂隙岩体的地球物理场特征，提出可行的地球物理方法对裂隙岩体实施高精度高分辨率探测，对于防治矿山灾害发生，保障矿山安全，具有重要的理论意义和实际应用价值。

And mining, the mining machinery, the mining slope ramp project are the design main bodies, in mining used advanced low poor has damaged the non-lower column partition to come down the law, will have the huge economic efficiency, the special mining slope ramp project, mainly included the slope ramp position the determination, the slope ramp form choice, the slope ramp cross section specification, the slope ramp slope, slope ramp aspect and so on curve design, slope ramp construction contents.

其中采矿、矿山机械、开采斜坡道工程是设计的主体，采矿中采用了先进的低贫损无底柱分段崩落法，将产生巨大的经济效益，专题开采斜坡道工程，主要包括斜坡道位置的确定、斜坡道形式的选择、斜坡道的断面规格、斜坡道坡度、斜坡道弯道设计、斜坡道施工等方面的内容。

And mining, the mining machinery, the mining slope ramp project are the design main bodies, in mining used advanced low poor has damaged the non-lower column partition to come down the law, will have the huge economic efficiency, the special mining slope ramp project, mainly included the slope ramp position the determination, the slope ramp form choice, the slope ramp cross section specification, the slope ramp slope, slope ramp aspect and so on curve design, slope ramp construction contents.

其中采矿、矿山机械、开采斜坡道工程是设计旳主体，采矿中采用le先进的低贫损无底柱分段崩落法，将产生巨大的经济效益，专题开采斜坡道工程，主要包括斜坡道位置确实定、斜坡道形式的选择、斜坡道的断面规格、斜坡道坡度、斜坡道弯道设计、斜坡道施工等方面的内容。

According to two coal mining practics by Xinshan Mine of Hegan Mining Bureau, through economic technique analysis, the article proves that suspend-shift support mining with sublevel caving is superioror to with slice-blasting mining in mining thick coal seam.

根据鹤岗局兴山矿两种采煤方法的实践比较，通过经济技术分析，证明开采厚煤层选用悬移支架放顶煤比分层炮采优越。

After take analyzed deeply for the opened magnet circuit with FEMM (Finite Element Method Magnetics) we find out the field distributing that is separated into three sections . One is the main area what we called as positive field section. Beside the main field there are tow areas that are called the inverted field sections. Loudspeaker arise a very serious distortion when the voice coil moving into inverted field areas. The direction of induced current in the coil part of entered inverted field area is same with the current driving into loudspeaker so that total currents increas largely and heat increase rapidly. With more coils moving into inverted area the voice coil will take on negative inductance properties. It is the main reason that voice coil is burned by heating with increasing current due to arise negative inductance. So opened magnetic circuit is not suitable for the woofers in which the voice coil have wider displacement range. When using this kind magnetic circuit design, the voice coil moving range should be less than the range of positive field to avoid loudspeaker arise serious distortion and heating. Even though voice coil moving range is in the positive area, loudspeaker will still arise more distortion because the field distribution is very cliffy at tow sides of the positive area and full range of magnetic field distribution is not parallel that will arise distortion. Base on above reasons, opened magnetic circuit is not an ideal magnetic circuit for low-frequency loudspeakers. But it can be used in mid-range or high-frequency productions.

开式磁路是由2片钕铁硼磁铁和主导磁板和导磁垫片组成，我们在实践过程中发现这种磁路结构不适合于低频扬声器的使用，我们通过使用FEMM（Finite Element Method Magnetics）软件包对该磁路进行了分析，该磁路的磁场范围被分成3个区域，其中在主导磁板附近形成一个正向磁场，在正向磁场的两边存在反向的磁场，音圈在工作时有很大一部分进入了反向磁场中，在反向磁场内线圈的感应电流方向与驱动电流方向相同，使得音圈呈现出负感抗特性，由于音圈的负感抗特性引起电流的增加导致音圈发热甚至烧毁，因此在扬声器中使用开式磁路时，音圈的运动范围应控制在正向磁场范围之内，否则音圈运动到反向磁场区域时将会产生很大的失真和发热，即使在设计时已经将音圈的运动范围控制在正向磁场范围之内，由于正向磁场的2个边缘磁场强度衰减太快，同时开式磁路中磁场的分布不是平行的，而是自由发散的分布，这样肯定会导致扬声器的非线性失真，因此我们得到的结论是：开式磁路并不是一个理想的磁路，它不适合于低频扬声器的使用，但它还可以应用于中高频扬声器。

The opened magnetic circuit is composed as tow NdFeB permanent magnets and a top plate without U-yoke. After take analyzed deeply for the opened magnet circuit with FEMM (Finite Element Method Magnetics) we find out the field distributing that is separated into three sections . One is the main area what we called as positive field section. Beside the main field there are tow areas that are called the inverted field sections. Loudspeaker arise a very serious distortion when the voice coil moving into inverted field areas. The direction of induced current in the coil part of entered inverted field area is same with the current driving into loudspeaker so that total currents increas largely and heat increase rapidly. With more coils moving into inverted area the voice coil will take on negative inductance properties. It is the main reason that voice coil is burned by heating with increasing current due to arise negative inductance. So opened magnetic circuit is not suitable for the woofers in which the voice coil have wider displacement range. When using this kind magnetic circuit design, the voice coil moving range should be less than the range of positive field to avoid loudspeaker arise serious distortion and heating. Even though voice coil moving range is in the positive area, loudspeaker will still arise more distortion because the field distribution is very cliffy at tow sides of the positive area and full range of magnetic field distribution is not parallel that will arise distortion. Base on above reasons, opened magnetic circuit is not an ideal magnetic circuit for low-frequency loudspeakers. But it can be used in mid-range or high-frequency productions.

开式磁路是由2片钕铁硼磁铁和主导磁板和导磁垫片组成，我们在实践过程中发现这种磁路结构不适合于低频扬声器的使用，我们通过使用FEMM（Finite Element Method Magnetics）软件包对该磁路进行了分析，该磁路的磁场范围被分成3个区域，其中在主导磁板附近形成一个正向磁场，在正向磁场的两边存在反向的磁场，音圈在工作时有很大一部分进入了反向磁场中，在反向磁场内线圈的感应电流方向与驱动电流方向相同，使得音圈呈现出负感抗特性，由于音圈的负感抗特性引起电流的增加导致音圈发热甚至烧毁，因此在扬声器中使用开式磁路时，音圈的运动范围应控制在正向磁场范围之内，否则音圈运动到反向磁场区域时将会产生很大的失真和发热，即使在设计时已经将音圈的运动范围控制在正向磁场范围之内，由于正向磁场的2个边缘磁场强度衰减太快，同时开式磁路中磁场的分布不是平行的，而是自由发散的分布，这样肯定会导致扬声器的非线性失真，因此我们得到的结论是：开式磁路并不是一个理想的磁路，它不适合于低频扬声器的使用，但它还可以应用于中高频扬声器。

Thissubject exerts the experiment method of analogue modeling, and we take geologic mining condition of the Xin Zhi Colliery of Huo Zhou Mineral Bureau in Shang Xi province as the physical model of background design. The experiment is divided into two phases, the first phase simulates the course of mining subsidence, we study rule of movement transmogrification of mining terrane. In the second phase, after the mining subsidence is gradually stabilization, we bring into bear different load in the different location of subsiding basin, and we study ground stability with goaf.

本课题以山西霍州矿物局辛置煤矿地质采矿条件为例，进行了相似材料模拟试验，试验分为两个阶段：第一阶段模拟开采沉陷过程，研究采动岩层移动变形规律；第二阶段在开采沉陷基本稳定之后，在沉陷盆地的不同位置施加大小不同的建筑物荷载，研究其地基的稳定性。

Image mining is the important branch of data mining.It is more than just an extension of data mining to image domain but an interdisciplinary endeavor.Image clustering and similarity retrieval are two basilic parts of image mining.

图像挖掘是数据挖掘的重要分支，它不仅仅是数据挖掘简单的扩展到图像领域，而是一个多学科交叉的研究方向周像的聚类和相似性搜索是图像挖掘的两个非常重要的领域。

Object of data mining is service concepts of service bag, carrier of data mining is history data, and spirit of data mining is mining classification.

在对服务概念开发进行数据挖掘时，服务包中的服务概念是数据挖掘的对象，历史数据是数据挖掘的载体，分类挖掘是数据挖掘的指导思想。

It realizes dynamic store and management of mining data and finishes inputting of mining data,3D visualization of mining area,establishing model of terrain surface,inquiring and analyzing spatial data,collection of DEM vector and image and so on.More convenience will be bring to mining manager.

系统实现了对矿业数据动态存储和管理，可完成矿业数据输入、矿区三维可视化、地形表面建模、矿区空间查询分析、DEM矢量影像数据集成等功能，必将给矿业管理工作者带来很大方便。

The system can be widely used in belt weighing and batching process control,etc.

介绍了基于智能模糊控制的嵌入式配料系统的设计方法，对模糊PID控制过程和系统调零作了重点的讨论，同时给出了PID控制的程序流程图和系统定长调零子程序。

"I dunno," she answered,"but if you show me aroun', I'll recognize it from the lighthouse just outside the porthole."

"我不知道，"她回答说，"如果你能带我转转，我能认出来的，因为灯塔就在舷窗外。"