This paper discusses the form of mechanical quantity operator and state vector of quantum mechanics under momentum image and coordinate image.

文章通过讨论量子力学力学量算符和态矢量在动量表象和坐标表象下的形式。

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The carefully engineered design achieves the absolute maximum mechanical advantage; along with the tool's light weight, operator fatigue is minimized.

精心的设计实现了最大的机械优势，同时因为工具的重量轻，操作人员的疲劳也降到最低程度。

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The analysis results show that the energy operator demodulating approach based on EMD can extract the characteristics of mechanical fault vibration signals efficiently.

对机械故障振动信号的分析结果表明，基于EMD的能量算子解调法能有效地提取机械故障振动信号的特征。

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Excluding dislodgments and perforations, which may be operator dependent, there were only 5 lead mechanical problems, namely conductor fractures, in over 8400 implant years.

FORBES: Robert Hauser, ICD Watchdog, Offers Viewpoint On Riata Controversy At HRS

Helping Komatsu persuade the mine operator to switch was a new drive system that instead of the conventional mechanical axle and cogs uses rear-wheel-mounted electrical motors.

FORBES: Magazine Article

The engineers are hoping to spot nascent mechanical problems on long-distance train lines run by First ScotRail, a Scottish train operator.

FORBES: Magazine Article