concentrate
发表于 2025-3-25 06:40:49
http://reply.papertrans.cn/87/8644/864305/864305_21.png
Lacunar-Stroke
发表于 2025-3-25 08:47:20
f the function. If the inverse of Hessian is not available, then Newton’s method fails to find the minimum point. These drawbacks are the central theme in the development of an important class of minimization algorithms, what so-called the conjugate direction algorithm. It uses the history of the pr
悦耳
发表于 2025-3-25 14:55:28
Selection of Main Mechanical Ventilators for Underground Coal MinesA Case Study
Paleontology
发表于 2025-3-25 17:09:07
Importance and Characteristics of Main Mechanical Ventilator,provement in efficiency for a 1000 kW mechanical ventilator running for 15 years will lead to considerable saving in power consumption, and this when discounted at the rate of 20% will offset the cost of mechanical ventilator itself, i.e., replacement of the mechanical ventilator is possible without
gait-cycle
发表于 2025-3-25 20:50:35
http://reply.papertrans.cn/87/8644/864305/864305_25.png
Optic-Disk
发表于 2025-3-26 03:06:17
2191-5547 nes.Provides a user friendly computer program to help any prThis book provides information on proper underground mine ventilation in order to detail its importance in maintaining safe, productive, healthy and effective underground environments at all times for employees. The text covers correct desi
reserve
发表于 2025-3-26 05:54:17
http://reply.papertrans.cn/87/8644/864305/864305_27.png
标准
发表于 2025-3-26 10:40:39
http://reply.papertrans.cn/87/8644/864305/864305_28.png
职业
发表于 2025-3-26 16:28:06
Importance and Characteristics of Main Mechanical Ventilator,ent, maintenance, and running costs of these mechanical ventilators are also very high. The electrical power consumed by main mechanical ventilator represents at least 15–17% of the total electrical load of any mine. A wrong selection of mechanical ventilator and associated electrical drive may resu
诗集
发表于 2025-3-26 17:06:32
Ventilation Network Analysis,etwork. It involves mathematical method of analyzing mine resistance to carry out ventilation planning, management, and control. Network analysis is a generic term covering group of methods that are used in cases to analyze and optimize airflow in a network of interconnected and related meshes that