The challenges of attendance tracking management include the need for flexible shift or roster plans, control of labor costs and real-time attendance monitoring and analysis.
企业要建立高效的考勤管理所面临的挑战包括：灵活合理的排班计划，劳动力成本的有效控制，实时的考勤数据审核和分析。
New event detection is an important research in the field of topic detection and tracking, and its task is real-time monitoring the stream of news stories and identifying the new topics in it.
新事件检测是话题检测与跟踪领域的一项重要研究，其任务是实时监控新闻报道流并从中识别新话题。
GPS positioning alarm system is the most advanced positioning alarm system, which can accomplish real-time monitoring in large range, real-time graphic display and continuous tracking.
GPS定位报警系统是目前实现大容量、大范围、实时监控、实时显示、连续跟踪最理想、最先进的定位报警系统，应用于交通管理，可以有效地维护交通安全。
GPS positioning alarm system is the most advanced positioning alarm system, which can accomplish real-time monitoring in large range, real-time graphic display and continuous tracking.
GPS定位报警系统是目前实现大容量、大范围、实时监控、实时显示、连续跟踪最理想、最先进的定位报警系统，应用于交通管理，可以有效地维护交通安全。
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