Analysis On The Spatial And Temporal Characteristics And Influencing Factors Of Youth Leisure Activities From The Perspective Of Planning

With the proposal of "land space planning" in China,the utilization of space in China has gradually turned to high-quality development.However,in the actual planning process,there is a deep dilemma of "not knowing where to build,not knowing how to build".Leisure activities play an important role in the development and vitality of the city.Youth leisure activities are the most characteristic part of leisure activities.Youth leisure space is the most characteristic and dynamic space in urban space.Therefore,from the youth leisure activities as the main starting point,this paper discusses how to identify the characteristic space of activities from the city scale,and combined with interviews to understand the specific space design demands.Through the combination of "big" data and "small" data,this paper analyzes urban activities and guides the coordination of "large" scale planning and "small" scale planning.Based on microblog,Gaode map,baidu map and other multiple big data from April to November 2020,selenium is used to optimize the crawling mode of urban street view map in data acquisition.In the analysis,the deep learning LSTM text classification model is used for deep mining of microblog semantics and CNN(convolutional neural network)model is used for street view image recognition.The types and spatial-temporal distribution characteristics of leisure activities of young people in Nanjing are analyzed quantitatively.Based on the influencing factors of spatial environment and field theory,the characteristic space of urban youth activities is classified and analyzed,Finally,the representative planning target system of youth leisure space is obtained.The main contents of each chapter of this paper are as follows: the first chapter expounds the research significance and research background of youth leisure activities,and determines the research problems and research framework.The second chapter combs the key concepts of youth and youth leisure activities,summarizes the commonly used theories about youth leisure activities,compares and selects the commonly used means to study the relationship between activities and space,and combs the data needed to complete the research content.The third chapter mainly describes the process and steps of urban multi big data processing.The fourth chapter mainly explores the distribution characteristics of youth leisure activities in Nanjing,and extracts seven types of characteristic space of youth activities;At the same time,it analyzes the performance and restriction of youth leisure activities in time.The fifth chapter takes seven types of characteristic space as the main carrier,analyzes the influence of different space environment elements on various types of leisure activities,obtains the positive and negative correlation of the influence and proposes the influence factor value.In the sixth chapter,combined with the interview and the investigation of specific places,the planning target system of seven types of youth leisure activity characteristic space is improved.The seventh chapter is the conclusion,reflection and prospect.The main findings are as follows: 1)young people’s habitual leisure activities are concentrated after work,and the occurrence peaks of different activities are different;2)Young people’s leisure activities in the urban distribution have obvious trend of gathering to high-quality space.3)all kinds of activities are greatly affected by the subjective and objective factors of the built environment.In a small range of urban space,the characteristics are different and closely related to the content of activities.4)In the specific space,the leisure activities of young people have obvious "activity chain" in time and "activity chain" in space,and have different characteristics in the built-up area or suburbs at different times of the day.5)Comprehensive development density,distance from bus station,green vision rate,sky openness,space privacy and walking comfort have different influencing factors and appropriate values for different youth leisure activity fields.6)Aiming at the urban youth leisure space with strong characteristics,the planning objective system is provided.This research has important reference significance for guiding youth leisure activities and promoting vigorous urban planning and design.The whole thesis contains about 64 000 words,61 pictures and charts.