نتایج جستجو برای: mining

تعداد نتایج: 86652  

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...

Journal: :مدیریت صنعتی 0
زیرار محمودی دانشجوی کارشناسی ارشد مهندسی معدن ـ فنی اقتصادی، دانشگاه تربیت مدرس، تهران، ایران احمد رضا صیادی دانشیار گروه مهندسی معدن ـ اقتصاد معدن، دانشکدۀ فنی مهندسی دانشگاه تربیت مدرس، تهران، ایران علی رجب زاده قطری دانشیار گروه مدیریت صنعتی، دانشکدۀ اقتصاد و مدیریت، دانشگاه تربیت مدرس، تهران، ایران

in despite of all progress in technology in mining industry, still labor is one of the key factors in mining operation. this paper presents a system dynamics approach to evaluate the mining labor productivity. therefore, after the identification of main effective variables, two quantitative and qualitative models were built. the qualitative model illustrates the complex interrelated structure o...

Journal: :علوم اجتماعی 0
دکتر گلمراد مرادی دکتر وحید قاسمی

this article of focused on data mining, which is very complex to recognize the correct, new models which are potentially useful in data, hence they will be useful, and acceptable for all humans. data mining is also called the exploration of knowledge, is the process of data analysis in the different aspect to summarize them into the suitable information, which is able to increase profits and to...

Journal: :journal of mining and environment 2010
a. ramezanzadeh m. hood

the first step in mining activities is rock excavation in both mine development and production. constant pressure for cost reduction and creating an improved/safe work environment for personnel has naturally resulted in increased use of mechanical excavation systems in many mining operations. also, mechanical excavation and mining is more compatible with automation, meaning possibility of reduc...

Journal: :pollution 2015
ikbal hussain jakir hussain mohammed arif vinod vadiya

rajasthan is one of the main mineral potential state of india. during the last 30 years it has witnessed enormous expansion of mining industries, but mining of most of the minor minerals coupled with changing climate has posed serious problems to the environmental fabric in the state, apart from base metal beneficiation plants. groundwater is also being polluted day-by-day by effluents generate...

This paper is based on the open pit to underground mining practice of Daye Iron Mine. The influence mechanism between high-steep slope and non-pillar sublevel caving method is studied by using physical model test. Firstly, engineering geological properties of the choosing typical research section is analysed and generalized. Secondly, the system of open pit to underground mining is developing a...

Journal: :journal of ai and data mining 2015
e. golpar-rabooki s. zarghamifar jalal rezaeenour

opinion mining deals with an analysis of user reviews for extracting their opinions, sentiments and demands in a specific area, which can play an important role in making major decisions in such area. in general, opinion mining extracts user reviews at three levels of document, sentence and feature. opinion mining at the feature level is taken into consideration more than the other two levels d...

Journal: :journal of ai and data mining 2015
a. telikani a. shahbahrami r. tavoli

data sanitization is a process that is used to promote the sharing of transactional databases among organizations and businesses, it alleviates concerns for individuals and organizations regarding the disclosure of sensitive patterns. it transforms the source database into a released database so that counterparts cannot discover the sensitive patterns and so data confidentiality is preserved ag...

Iran is rich in ancient mining and metallurgical relics. Nevertheless, the studies on these relics have so far been mostly unsystematic. The road map for the ancient mining and metallurgical studies in Iran, that has been ordered by the Research Centre for Conservation of Cultural Relics of Iran (RCCCR), proposes a systematic multidisciplinary plan for the ancient mining and archaeometallurgica...

Journal: :محیط شناسی 0
نرگس حاج کاظمیها دانشجوی دکتری علوم محیط زیست، دانشکدۀ محیط زیست و انرژی، دانشگاه آزاد، واحد علوم و تحقیقات تهران، محمود شریعت استاد، دانشکدۀ محیط زیست و انرژی، دانشگاه آزاد، واحد علوم و تحقیقات تهران مسعود منوری استادیار، دانشکدۀ محیط زیست و انرژی، دانشگاه آزاد، واحد علوم و تحقیقات تهران محمد عطایی استاد، دانشکدۀ مهندسی معدن، دانشگاه صنعتی شاهرود

introduction development of natural resources and mining activities are prerequisite for economic and industrial growth in many countries. in many cases, such mining areas lie within residential or agricultural lands or natural habitats intensifying the contradiction between land use and environmental protection. different components of mining activities including exploration, extraction and pr...

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