background count

because of the complexity of the 2-d image background captured with a surveillance camera, general methods applied to deal with a moving luminous object in dark background will induce a count error for objects. therefore, a method being called synthetic shape detection is described.

采用通常方法处理暗背景下运动发光目标，因监测摄像机所拍摄二维图像背景的复杂性，导致对目标数量统计的误差，为此，提出了综合形状检测法。

The background count of the detector is 4～6 counts 1 min.

探测器的本底计数率为4―6脉冲1分.

Further analysis shows that the technical background knowledge in the test and the sociolinguistic and psycholinguistic aspects of Marine Navigational English for Seafarers may ac-count for such less significant correlations and greater individual difference.

航海英语考试中的非语言知识是导致相关度较低的重要原因，另外航海英语的特殊社会属性和船员的心理特点对航海英语呈较大个体差异起着重要作用。