{'fraction_non_alphanumeric': 0.025838953441131064, 'fraction_numerical': 0.022263752336068903, 'mean_word_length': 5.603004291845494, 'pattern_counts': {'":': 0, '<': 0, '<?xml version=': 0, '>': 0, 'https://': 0, 'lorem ipsum': 0, 'www.': 0, 'xml': 0}, 'pii_count': 0, 'substrings_counts': 0, 'word_list_counts': {'cursed_substrings.json': 2, 'profanity_word_list.json': 0, 'sexual_word_list.json': 0, 'zh_pornsignals.json': 0}}
Research on Coordination Evaluation of Water Resources Utilization and Economic Development in Beijing

The coordination degree evaluation method is used to evaluate the coordination degree of industrial water utilization structure and industrial structure in Beijing. On this basis, it is suggested to design the evaluation index system for the coordination of water resources utilization and economic development in Beijing, and the grey correlation analysis method and coordination degree evaluation method are used to evaluate the correlation degree and coordination degree between the utilization of water resources and economic development in Beijing. According to the research, it is found that during the period from the "Eighth Five-Year Plan" to "Thirteenth Five-Year Plan", the extensive degree of industrial water utilization structure in Beijing has shown a significant decline, from 0.71 to 0.36; the partiality to high water consumption in Beijing has a slight fluctuation and decline, from 0.29 to 0.09; and the coordination degree between industrial water utilization structure and the industrial structure in China has increased from 0.54 to 0.82, changing from a "comparatively coordinated" state to a "coordinated" state. The grey correlation degree between water resources utilization and economic development in Beijing has shown a slightly upward trend, from 0.59 to 0.89. The coordination degree between water resources utilization and economic development in Beijing has a small fluctuation range, increasing from 0.83 to 0.87.


INTRODUCTION
As a strategic production factor, basic living resource, and guaranteed ecological resource, water resources provide an important guarantee for economic development, residents' lives, and environmental protection in Beijing. In the 14th Five-Year Plan, Beijing proposed to strengthen the strategic reserve of water resources in Beijing, strengthen water pollution control and water resources protection, and improve the level of intensive and safe use of water resources, in order to accelerate the transformation and upgrading of Beijing's economic and industrial structure, and effectively improve the coordination between water resources utilization and economic development in Beijing. To this end, it is suggested to carry out the study on the coordination evaluation of water resources utilization and economic development in Beijing, which is conducive to providing decisionmaking support for optimizing Beijing's water resources allocation and improving the coordination between Beijing's water resources utilization and economic development. According to the existing literature, on the basis of constructing a comprehensive evaluation index system for water resources utilization and economic development [1][2][3], scholars mainly use VAR model [4], regional Gini coefficient [5], coupling coordination degree model [6], [7] and decoupling evaluation model [8], [9], [10], [11], [12] and other models to evaluate the coordination degree between water resources utilization and economic development. Judging from the research results of the coordination evaluation of water resources utilization and economic development in Beijing, scholars have carried out a correlation analysis on water resources utilization and economic development [13], [14], [15], and determined the dynamic trend of industrial structure and water resources utilization structure [16], [17] , and focused on the evaluation of the decoupling relationship between water resources utilization efficiency, water resources utilization and economic development in Beijing [6], [18], [19], [20], [21]. However, few scholars have carried out coordination evaluation studies on Beijing's water resources utilization and economic development in different planning periods. To this end, the coordination degree evaluation method and grey correlation analysis method are used to construct the coordination evaluation model of industrial water utilization structure and industrial structure, and the coordination evaluation model of water resources utilization and economic development. It is required to develop researches on the correlation degree and coordination degree between water resources utilization and economic development in Beijing.

Coordination Evaluation Model of Industrial Water Utilization Structure and Industrial Structure
The coordination degree evaluation method is used to evaluate the coordination degree between the industrial water utilization structure and the industrial structure based on the calculation of the extensive degree of industrial water utilization structure and the partiality to high water consumption. The formula can be expressed as: H refers to the coordination degree between industrial water utilization structure and industrial structure in t period. t P is the partiality to high water consumption in t period; j is the positional value of j industry. If the industrial water utilization efficiency of j industry is lowest, the positional value will be 1, and so on.

Coordination Evaluation Model of Water Resources Utilization and Economic Development
Based on the establishment of a coordinated evaluation model of industrial water use structure and industrial structure, the coordinated evaluation index system of water resources utilization and economic development is designed, and the grey relational analysis method and coordination degree evaluation method are used to construct a coordinated evaluation model of water resource utilization and economic development. (See " According to "Equation (1)", the grey correlation analysis method and the coordination degree evaluation method are used to evaluate the coordination degree of Beijing's water resources utilization and economic development in different periods, reflecting the coordination situation of Beijing's water resources utilization and economic development in different periods. Firstly, the grey correlation analysis method is used to calculate the grey correlation degree between the order parameter index and ideal index collection in t period. That is, Secondly, the coordination degree evaluation method is used to evaluate the coordination degree between water resources utilization and economic development.
In formula, t C is the coordination degree between water resources utilization and economic development in t period. Among, 1 t R and 2 t R are the indicators of water resources utilization and economic development in t , respectively.

COORDINATION EVALUATION OF INDUSTRIAL WATER UTILIZATION STRUCTURE AND INDUSTRIAL STRUCTURE IN BEIJING
The water resources bulletin of Beijing does not list the water utilization of the first industry, the second industry and the tertiary industry separately. Among them, it only statistics agricultural water utilization data of the first industry; industrial water utilization does not include the water utilization data of construction industry of the second industry; the water utilization data of third industry is included in the domestic water utilization data. Therefore, the conversion coefficients of water utilization for the first industry and agriculture, secondary industry and industrial engineering, and the water utilization for residents' living in Tianjin are estimated by referring to the water utilization of the three industries in "the water resources bulletin of Tianjin". The three industrial water utilization and the domestic water utilization of residents in Beijing are deduced and estimated respectively according to the principle of equal proportion. Finally, the industrial water utilization structure of Beijing from 1990 to 2019 is calculated, including the extensive degree of industrial water utilization structure, the partiality to high water utilization of industrial structure, the coordination degree between industrial water utilization structure and industrial structure, as shown in " Figure 1 According to " Figure 1", from 1990 to 2019, the extensive degree of industrial water utilization structure in Beijing showed a significant downward trend, from 0.75 in 1990 to 0.32 in 2019. The partiality to high water utilization of industrial structure in Beijing fluctuated slightly, from 0.35 in 1990 to 0.08 in 2019. Thus, it shows that the water utilization efficiency of Beijing is increasing and the industrial structure is optimizing. According to the evaluation criteria of the coordination degree between industrial water utilization structure and industrial structure in " Table 1", the evaluation results of the coordination degree between industrial water utilization structure and industrial structure in Beijing are as follows. In 1990, the industrial water utilization structure and industrial structure were in poor coordination, and the coordination degree was only 0.49. From 1991 to 2011, the industrial water utilization structure and industrial structure were relatively coordinated, and the coordination degree continued to increase from 0.51 to 0.74. From 2012 to 2019, the industrial water utilization structure and industrial structure are in a state of coordination, and the degree of coordination continues to increase from 0.75 to 0.84. In general, during the period from "eighth five-year Plan" to "thirteenth five-year plan", the average extensive degree of industrial water utilization structure in Beijing decreased from 0.71 to 0.36, the average partial degree of industrial structure decreased from 0.29 to 0.09, and the average coordination degree of industrial water utilization structure and industrial structure increased from 0.54 to 0.82, which changed from "relatively coordinated" state to "coordinated" state.

EVALUATION OF COORDINATION DEGREE BETWEEN WATER RESOURCES UTILIZATION AND ECONOMIC DEVELOPMENT IN BEIJING
According to the evaluation indexes in " Table  2  In general, the grey correlation degree between water resource utilization and economic development in Beijing increased from 0.59 to 0.89 in the period from "eighth five-year Plan" to "13th five-year plan", and the average coordination degree between water resource utilization and economic development in Beijing increased from 0.83 to 0.87.

CONCLUSION
From 1990 to 2019, the extensive degree of Beijing's industrial water utilization structure showed a significant decline, and the degree of partiality of Beijing's industrial structure showed a slight fluctuation and decline trend. From 1991 to 2011, the industrial water structure and industrial structure of Beijing were more coordinated. From 2012 to 2019, Beijing's industrial water utilization structure and industrial structure have been in a state of coordination. During the period from the "eighth five-year plan" to the "thirteenth five-year plan", the average value of the extensive degree between Beijing's industrial water utilization structure dropped from 0.71 to 0.36. The average value of the partiality of Beijing's industrial structure dropped from 0.29 to 0.09. As a result, it indicates that Beijing's water utilization efficiency is on the rise, and the industrial structure is continuously optimized. The average value of the coordination degree between the industrial water utilization structure and the industrial structure in Beijing increased from 0.54 to 0.82, changing from a "comparatively coordinated" state to a "coordinated" state. From 1990 to 2019, the grey correlation between water resources utilization and economic development in Beijing showed a slight fluctuation upward trend, reaching 0.96 in 2019. The coordination degree between water resource utilization and economic development in Beijing has a relatively small fluctuation range, in the [0.80, 0.90], rising from 0.83 in 1990 to 0.87 in 2019. During the period from the "eighth five-year plan" and "thirteenth five-year plan", the average grey correlation between water resource utilization and economic development in Beijing increased from 0.59 to 0.89. The average value of coordination between water resource utilization and economic development in Beijing increased from 0.83 to 0.87.

AUTHORS' CONTRIBUTIONS
Dan Wu is responsible for experimental design and writing the manuscript, Yue Li , Renxing Yang , Yanlai Jin is responsible for analysed data and writing the manuscript.