نتایج جستجو برای: shovel

تعداد نتایج: 326  

2016
Helena Shaverdo Katayo Sagata Michael Balke

Two new species of Exocelina Broun, 1886 from Papua New Guinea are described herein: Exocelina mondmillensis sp. n. and Exocelina pseudomarinae sp. n. They are placed into the Exocelina broschii-group based on the shovel/fork-like ventral sclerites of their median lobe. While the former has rather distinct combination of the morphological characters (inconspicuous dorsal punctation, thin apex o...

Journal: :Revista de biologia tropical 2002
Sabine Dittmann

One had to be quick. Walk like a stork. Easier said than done, carrying a backpack full of equipment, buckets full of samples and a shovel over the shoulder, sinking knee-deep into the mud under the scorching tropical sun and watching out for crocodiles. I looked like a pig already. What was I doing here? Growing up near the coast of the North Sea, harbouring the Wadden Sea being one of the mos...

2001
Ken McRae Mary Hare Todd R. Ferretti Jeffrey L. Elman

Verbs are a major component of theories of language processing, partly because they exhibit systematic restrictions on their arguments. However, verbs follow their arguments in many constructions (particularly in verb-final languages), making it inefficient to defer processing until the verb. Computational modeling suggests that during sentence processing, nouns may activate information about s...

2017
Wenhua Jia Chenbo Yin D A Ikonnikov

In the article performed an analysis of ore reclaiming and overloading point characteristics at modern opencast mines. Ore reclaiming represents the most effective way of stability support of power-intensive and expensive technological dressing process, and, consequently, of maintenance of the optimal production and set-up parameters of extraction and quality of finished product. The paper prop...

Transportation costs are a significant part of capital and operating costs of large open pit mines. Cost efficiency and high reliability of in pit crushing and conveying systems compared to conventional truck-shovel system makes it more appealing to be utilized in modern mining activities. In this paper the suitable location of an in pit crusher is investigated as a single hub location problem....

2001
Yassiah Bissiri W. Scott Dunbar Allan Hall

The dispatch of trucks and shovel has always been an important component in the success of open pit mine operations. Dispatch systems have evolved from manual to today automatic with almost no human intervention. Although dispatching systems available today are “pseudo real time” and efficient, the optimal dispatching is realized over subsets of the fleet when dealing with large fleets. This ap...

2015
Danny R. Sawyer

This Peruvian-American cooperative study of paleopathology of the pre-Columbian Peruvian cultures of Southern Peru began in 1971. The purpose of this study is to evaluate the medical and dental health status of these cultures which date from 600 BC to the Spanish conquest. While several authors such as Leigh,1 Moodie,2 Stewart,3 and Goaz and Miller4 have studied the dental morphology of Norther...

Journal: :Engenharia Agricola 2023

The aim of this study is to simplify the difficult excavation that caused by root-sand complex in process harvesting Cyperus esculentus desert Xinjiang performing mechanical tests and analysis interaction between vibrating shovel rotary blade on complex. number, speed digging depth were used as test parameters, breakage rate, root-grass crushing soil carrying rate indicators. characteristics in...

Journal: :Chinese Journal of Mechanical Engineering 2022

Abstract Electric cable shovel (ECS) is a complex production equipment, which widely utilized in open-pit mines. Rational valuations of load the foundation for development intelligent or unmanned ECS, since it directly influences planning digging trajectories and energy consumption. Load prediction ECS mainly consists two types methods: physics-based modeling data-driven methods. The former app...

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