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Article summary:
1. Urban shrinkage is a global phenomenon characterized by population decline and economic recession, which has become an unavoidable problem for urban planners.
2. Identifying shrinking city trajectories based on the time scale provides a theoretical framework for understanding and comparing the changing process of shrinking cities, and the driving factors of the shrinking trajectories should be studied from both a global perspective and the local background of population loss.
3. Population loss is the focus of urban shrinkage research, and predicting changes in population can help make a reasonable development plan for a city. Various countries have taken different measures to manage negative effects brought about by population decline, but challenges still exist in matching policies and measures with future population size.
Article analysis:
该文章对城市萎缩现象进行了定量识别和演化趋势模拟，但存在一些偏见和不足之处。
首先，文章将城市萎缩视为一个全球性的问题，但并未考虑到不同国家、地区的历史、文化、经济等差异对城市萎缩的影响。其次，文章过于强调人口变化作为识别城市萎缩的主要指标，而忽略了其他因素如经济衰退、社会问题等对城市萎缩的影响。此外，文章提出了时间尺度和时间跨度对于识别城市萎缩的重要性，但并未给出具体实例或数据支持这一观点。
此外，在分析城市萎缩形成机制时，文章只考虑了城市自身特征对其产生影响的因素，并未充分考虑周边环境、政策等因素对城市萎缩的影响。同时，在提出解决方案时，文章也没有充分探讨可行性和实施难度等问题。
总体来说，该文章存在片面报道、无根据主张、宣传内容等问题，并未平等地呈现双方观点。需要更加客观全面地探讨城市萎缩问题，提出更加切实可行的解决方案。
Topics for further research:
Regional and cultural differences in urban shrinkage
Factors beyond population change affecting urban shrinkage
Lack of specific examples or data supporting the importance of time scale and span
Insufficient consideration of external factors in the formation of urban shrinkage
Inadequate exploration of feasibility and implementation difficulties in proposed solutions
Need for more objective and comprehensive exploration of urban shrinkage and practical solutions.