目前对挖泥船管理维修的方法主要有定期维修和事后维修。
At present, the management maintenance methods of dredger are primary Time Based maintenance and Run-to-Breakdown maintenance.
早期的设备管理主要是设备故障维修，是一种被动的事后维修的设备管理方式。
The early equipment management, which is chiefly the breakdown maintenance, is a passive equipment management style.
企业设备管理的一个重要发展趋势就是由预知维修、预防维修逐步替代传统的事后维修。
Gradual substitution of foreseen maintenance and preventive maintenance for traditional after maintenance represents significant progress in equipment management in the enterprise.
长期以来，继电保护设备的维修方式是按以定期性检验为主，事后维修为辅的原则而进行的。
For a long time, the maintenance mode of relay protection equipments is based on the principle of mainly periodical inspection, supplemented by break maintenance.
目前，航空发动机多采用事后维修和定期维修制度，这样不仅在人力、物力上造成浪费，而且容易在检修过程中产生新的故障。
Aeroengine is serviced after accident or maintained timely. It will not only waste manpower and material resources, but also bring new fault in the examining and repairing courses.
构造了元件故障向量、维修向量、故障频率序列和修复序列，并利用其运算描述了元件的工作、故障、维修和修复过程，从而计算出在事后维修方式和维修时间分布影响下的元件动态可靠性指标：故障频率，有效度。
With them the process of units work, failure, repair and renovation is described, sequentially the dynamic failure and availability of the units can be computed under the influence of the repair time.
研究结果表明，主动维护技术的重点是对液压系统故障进行事前的防护，而不是事后的维修。
The research result shows that the important point of the proactive maintenance is the prevention of the fault of the hydraulic system in advance, instead of the maintenance afterwards.
研究结果表明，主动维护技术的重点是对液压系统故障进行事前的防护，而不是事后的维修。
The research result shows that the important point of the proactive maintenance is the prevention of the fault of the hydraulic system in advance, instead of the maintenance afterwards.
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