Results 111 to 120 of about 13,666 (200)

Research on equipments cooperative advancing control technology on fully-mechanized coal mining face and two-roadways

Gong-kuang zidonghua, 2018
For problems of low automation level and poor cooperative control of equipments on fully-mechanized coal mining face and two-roadways, a scheme of equipments cooperative advancing control technology on fully-mechanized coal mining face and two-roadways was proposed, which took self-advancing control technology of support, transportation and auxiliary ...
openaire   +1 more source

Rural nonfarm employment : a survey [PDF]

So little is known about the rural nonfarm sector that those making policy to assist rural small-scale enterprises have done so largely"unencumbered by evidence". The Lanjouw survey of nonfarm data and policy experience attempts to correct this.
Lanjouw, Jean O., Lanjouw, Peter
core  

Origins of Modern Data Analysis Linked to the Beginnings and Early Development of Computer Science and Information Engineering [PDF]

, 2008
The history of data analysis that is addressed here is underpinned by two themes, -- those of tabular data analysis, and the analysis of collected heterogeneous data.
Murtagh, Fionn
core   +2 more sources

Market assessment of photovoltaic power systems for agricultural applications in Colombia [PDF]

The market potential for photovoltaic systems in the agricultural sector of Colombia is assessed. Consideration was given to over twenty specific livestock production, crop production, and rural services applications requiring less than 15 kW of power ...
Neyeloff, S., Steigelmann, W.
core   +1 more source

Key technology and equipment for fully mechanized mining with extra-large shearing height of 10 m in extra-thick coal seam

Meitan xuebao
Fully mechanized mining technology with extra-large shearing height is the optimal technical approach to achieve high-yield, high-efficiency and high-recovery mining for 6−10 m ultra-thick coal seam in Chinese coal mines. Based on the analysis of the current status of fully mechanized mining technology and equipment with extra-large shearing height at ...
Hongpu KANG, Yajun LEI, Futang ZHAO, Gang XU, Zenglin LI, Mingzhong LI, Rui WANG, Zhizeng HUANG, Jiangbin LIU, Ying MA, Cundi HAN, Yanjun FENG, Zhen ZHANG, Jinhu ZHANG, Jianchao REN, Yejie SONG, Mingsheng ZENG, Lixing CHENG   +17 more
openaire   +1 more source

Working face status detection in coal mine based on YOLOv8-EST. [PDF]

Sci Rep
Wang H, Wu G, Yang Q, Huang Y, Lv Z, Yang J.   +5 more
europepmc   +1 more source

Application of remote sensing to selected problems within the state of California [PDF]

There are no author-identified signficant results in this ...
Benson, A. S., Bowden, L. W., Colwell, R. N., Estes, J. E.   +3 more
core   +1 more source

The impact of obstacle parameters on mid-high frequency noise propagation in comprehensive mining workfaces and safety implications. [PDF]

Sci Rep
Jia G, Yang M, Jiang D, Guo J, Liu M, Tao Y.   +5 more
europepmc   +1 more source

Evolution and dip effect of boundary spatial morphology of top-coal limit equilibrium zone in steeply dipping coal seam. [PDF]

Sci Rep
Wu X, Chi X, Lang D, Wu Y, Zhang Z, Chen S.   +5 more
europepmc   +1 more source

Re-inventing New Zealand: Institutions Output and Patents 1870-1939 [PDF]

New estimates of commodity output and patenting are used to explore New Zealand’s transition from extensive to intensive growth. By investigating the cointegrating and causal relationships among the output of 25 industries we show that a small number of ...
David Greasley, Les Oxley
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