نتایج جستجو برای: mine ventilation network

تعداد نتایج: 740591  

Journal: :Critical care medicine 2004
Gordon D Rubenfeld Claudette Cooper Greg Carter B Taylor Thompson Leonard D Hudson

OBJECTIVE No studies have explored the barriers to implementing lung-protective ventilation in patients with acute lung injury (ALI) and acute respiratory distress syndrome (ARDS). Our objective was to identify barriers to using lung-protective ventilation in patients with ALI/ARDS. DESIGN Survey with content analysis of open-ended responses. SETTING Medical center. PARTICIPANTS Experienc...

2010
S. B. Bealko J. Holtan

The United States is trending away from traditional mine rescue contest training toward hands-on skills training that focuses on being better prepared for an actual mine emergency response. New technologies and engaging training exercises are providing more realistic experiences to mine rescue teams. The National Institute for Occupational Safety and Health (NIOSH), in partnership with LightsOn...

Journal: :International Journal of Coal Science & Technology 2021

Abstract Wall-mounted swirling ventilation is a new type of system in mechanized excavation faces with dust suppression performance that closely related to the blowing-to-suction flow ratio. Physical and simulation models were developed according No. C103 face Nahe Coal Mine Baise Mining Bureau, Guangxi Province optimize ratio for wall-mounted ventilation. Both k-ε turbulence model discrete pha...

Production scheduling in underground mines is still a manual process, and achieving a truly optimal result through manual scheduling is impossible due to the complexity of the scheduling problems. Among the underground mining methods, sub-level caving is a common mining method with a high production rate for hard rock mining. There are limited studies about long-term production scheduling...

2013
Wang Wen-Xing

The coal information system based on the electric power line was put forward after analyzing briefly the structure of mine distribution power network in roadway underground, connected with communication and monitoring networks existed already. The system uses a multi-level distributed bus network structure, roadway where harsh conditions, using a combination of multi-carrier and spread spectrum...

Journal: :Energies 2022

Carrying out exploitation in coal mines with a methane hazard imposes the use of special procedures and analyses numerous parameters order to secure mining teams working underground. The article presents method seam design under conditions for newly prepared seams 404/1 403/1 years 2022 2030 mine southern Poland as case study. It primarily focuses on preparation prognosis. When adequately prepa...

2012
H L Zhao

The pipeline network of coalmine has the characteristics of widespread distribution and complex structure. It is difficult to detect abnormalities in time by manual when the faults occurred, which often lead to reduction in production. In this paper, a monitoring system is developed to monitor the operating conditions of the pipeline network in real-time. The system has abilities to dynamic mon...

2013
Judith Gelernter Dong Cao Kathleen M. Carley

It is often possible to better understand group change over time through examining social network data in a spatial and temporal context. Providing that context from a text analysis perspective requires identifying locations and associating them with people. This paper presents our GeoRef algorithm to automatically do this person-to-place mapping. It involves the identification of location, and...

2010
Abdellah Chehri H. T. Mouftah

Wireless Sensor Networks (WSNs) offer numerous advantages over traditional networks, such as elimination of costly wires, enhanced monitoring precision and larger area coverage. This paper presents the design and implementation of a mine temperature monitoring based on sensor networks. For the proposed monitoring schema, we evaluated the performance and the interoperability of sensor network wi...

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