【判断题】建筑力学的主要研究对象是杆件与杆件结构。
【单选题】下列排序方法中 , 可能会出现这样的情况:在最后一趟开始之前,所有元素都不在其最终位置上。
【简答题】案例四: 北京某家生产制造企业最近在产品分销中通过引入准时制(JIT)系统,减少了库存,提高了利润率。该企业还引入了一套先进计划与排序系统(APS),使得他们能够实现更精确的排产,并减少了生产延迟。这套系统使得该企业极大地缩短了计划时间,减少了满足不可预测需求的库存(这种库存称为“安全库存”),同时去除了生产过程中许多不必要的费用。 管理人员还将得到有关生产进度预期变化的报告,以便生产人员与企业能...
【单选题】A bypass line provided around a waste heat auxiliary boiler in a diesel engine exhaust system, may be used to avoid boiler ______.
A.
corrosion at low engine loads
B.
erosion at high engine loads
C.
overload at high engine loads
D.
scaling at all exhaust temperatures
【单选题】With which of the following types of diesel engine arrangements is a waste heat boiler most likely to produce the maxium steam pressure, temperature, and flow conditions?
A.
Supercharged, four-stroke/cycle diesel engine
B.
Supercharged, loop scavenged diesel engine
C.
Turbocharged , crossflow scavenged diesel engine
D.
Turbocharged, return flow diesel engine