نتایج جستجو برای: mining faces

تعداد نتایج: 127201  

2013
Shui-Hua Jiang Dian-Qing Li Chuang-Bing Zhou Li-Min Zhang

The stochastic response surface method (SRSM) and the response surface method (RSM) are often used for structural reliability analysis, especially for reliability problems with implicit performance functions. This paper aims to compare these two methods in terms of fitting the performance function, accuracy and efficiency in estimating probability of failure as well as statistical moments of sy...

2009
Ivan Eggel Henning Müller

The ImageCLEF image retrieval track has been part of CLEF (Cross Language Evaluation Forum) since 2003. Organizing ImageCLEF and its large participation of research groups involves a considerable amount of work and data to manage. Goal of the management system described in this paper was to create a system for the organization of ImageCLEF to reduce manual work and professionalize the structure...

Journal: :SHS web of conferences 2023

Due to society's biased perception of coal enterprises, Mining Engineering students’ cultivation faces problems such as students' unwillingness engage in mining work and the decoupling graduates' abilities from job demands. The teaching research team conducted in-depth exploration on model applied engineering professionals, constructed a university-enterprise cooperation for talent guided by sp...

Journal: :Energies 2021

The determination of natural gas content in coal seams is essential to safe mining activities and estimate resources. It used methane emissions into workings, which very important when using preventive measures ignition explosion. Methane a seam mostly determined direct method. However, problem with estimation loss during collecting sample mine occurs each That estimated different procedures. I...

Journal: :Eastern-European Journal of Enterprise Technologies 2022

Distributed Data Mining (DDM) is vital in various applications for processing large volumes of data. The datasets are saved the local databases and operated by communities, but it provides solution locally globally. However, stored a distributed manner which affects scalability reliability issues. In addition, data influenced security privacy challenges. third party may access DDM, causes autho...

Journal: :journal of advances in computer engineering and technology 0
fatemeh eghrari solout department of computer engineering, islamic azad university, science and research branch, tehran, iran. mehdi hosseinzadeh department of computer engineering, islamic azad university, science and research branch, tehran, iran

one of the most important issues related to knowledge discovery is the field of comment mining. opinion mining is a tool through which the opinions of people who comment about a specific issue can be evaluated in order to achieve some interesting results. this is a subset of data mining. opinion mining can be improved using the data mining algorithms. one of the important parts of opinion minin...

Journal: :Applied sciences 2021

The gob-side roadway in an isolated island working face is a typical representative of strong mining roadway, which seriously restricts the efficient and safe production underground coal mines. With engineering background main transportation 1513 (MTR 1513) Xinyi Coal Mine, this paper introduces case driving with small coal-pillar facing under alternate wide narrow faces. Through comprehensive ...

Journal: :journal of mining and environment 0
hesam dehghani department of mining engineering, hamedan university of technology, hamedan, iran ashkan siami department of mining engineering, hamedan university of technology, hamedan, iran peyman haghi department of mining engineering, hamedan university of technology, hamedan, iran

one of the most important steps involved in mining operations is to select an appropriate extraction method for mine resources. after choosing the extraction method, it is usually impossible to replace it with another one because it may be so expensive that implementation of the entire project could be economically impossible. choosing a mining method depends on the geological and geometrical c...

آقا‌کاردان, احمد, کیهانی, مینا,

As computer networks become the backbones of science and economy, enormous quantities documents become available. So, for extracting useful information from textual data, text mining techniques have been used. Text Mining has become an important research area that discoveries unknown information, facts or new hypotheses by automatically extracting information from different written documents. T...

2015
Zhitao Zheng Ying Xu Desheng Li Jianghui Dong Samuel Frimpong

Sudden falls of large-area hard roofs in a mined area release a large amount of elastic energy, generate dynamic loads, and cause disasters such as impact ground pressure and gas outbursts. To address these problems, in this study, the sleeve fracturing method (SFM) was applied to weaken a hard roof. The numerical simulation software FLAC3D was used to develop three models based on an analysis ...

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