标题： 手术时间定义与主要不确定性 显示英文标题

标题： Operative Time Definition and Principal Uncertainity

摘要： 给出了时间必须以操作性方式定义的论据，即通过构建可用作时钟的设备。对这类设备的研究得出结论：如果考虑的时间间隔不大于普朗克时间，则时间存在固有的不确定性。因此，根据旧的经典概念，在这一尺度上时间无法很好地定义。时间的不确定性导致经典引力和广义相对论在普朗克尺度下失效；因果律也发生同样的情况。我们提出了论据，表明必须用新的概念取代经典的将时间简单视为实参数的概念。 显示英文摘要

摘要： Arguments are given that time must be defined in an operative manner,i.e., by constructing devices which can serve as clocks.The investigation of such devices leads to the conclusion that there is a principal uncertainity of time if one considers periods which are not large compared with the Planck time. Thus,according to the old (classical) concept,time cannot be well-defined at this scale.The uncertainity of time leads to a breakdown of Special and General relativity in the Planck regime;the same happens with causality. We present arguments that the classical concept of time,which treats t simply as a real parameter,must be replaced by a new one.