经济使用寿命
- 网络Economic service life;economiclife
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既有铁路混凝土桥梁的维修及经济使用寿命预测
Maintenance and Economic Service Life Prediction of Existing Railway Concrete Bridges
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JD-4450型拖拉机经济使用寿命的研究
Study on the reasonable service life for imported jd-4450 tractor
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桥梁加固后的经济使用寿命评估
Estimation on Economic Using Life of Reinforced Bridge
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对有关经济使用寿命的指标进行分析研究。
And the index relating to the reasonable service life were analyzed and studied in this paper .
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建立了一个使金属切除率最大为目标函数,刀具经济使用寿命、加工精度、机床功率和机床进给机构强度等为约束条件的数学模型。
An optimization model is formed with cutting volume of metal as the objective function , and machining time , machining accuracy , capacity of machining tool and feeding intensity of machining tool as constraints .
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变压器线圈热点温度是变压器安全、经济运行和使用寿命的主要决定因素。
Winding hot-point temperature is one of the key factors to safety and economy operation as well as life of transformers .
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设备选型遵循技术先进、安全可靠、经济合理、使用寿命长的原则。
Selection of the equipment shall comply with the principle of state-of-the-art technology , safety and reliability , economy and rationality and long service life .
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曲轴作为往复泵动力端中最关键的受力零件,它的可靠性直接影响着整机的可靠性、经济性以及使用寿命。
Crankshaft is one of the most critical parts in reciprocating pump dynamic section , its reliability directly affect the economy , reliability , and service life of the machine .
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缸套-活塞环摩擦副的工作直接影响到内燃机的效率、经济指标、使用寿命及污染物的排放等。
The feature of friction between cylinder liner and piston ring affects all the technical and economic indexes , uses and service life and emission of pollutant of internal combustion engine directly .
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柴油机凭借其循环热效率高、燃油经济性好和使用寿命长等优点逐渐被客车和卡车所普遍接受。
Diesel engines have been widely used in passenger cars and trucks because of their attractive characteristics such as high thermal efficiency , fuel economy , and durability .
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运用可持续发展思想和经济优化理论,结合桥梁结构时变可靠度理论,提出了桥梁加固后剩余经济使用寿命的计算方法,可应用于桥梁加固工程的持续性评价。
Applying sustainable development idea and economic optimization theories , combining reliability-based time of bridge structure , the dissertation establishes calculating method of strengthening bridge 's remaining economic service lifespan . This can be applied in persistent evaluation of bridges strengthening .