Research on Innovation Non-Equilibrium of Chinese Urban Agglomeration Based on SOM Neural Network
Abstract
:1. Introduction
2. Literature Review
3. Research Methods and Results
3.1. Preliminary Analysis of the Current Situation of Innovation and Development of Chinese Urban Agglomeration
3.1.1. Definition of Urban Agglomeration
3.1.2. Number of Patent Applications and Authorizations
3.1.3. Patent Conversion Rate
3.2. Research on the Disequilibrium of Innovation and Development of Chinese Urban Agglomerations
3.2.1. Theil Index Method
3.2.2. Innovation Imbalance Based on the Gap in the Patent Conversion Rate of Urban Agglomerations
3.2.3. Self-Organizing Feature Map (SOM)
- (1)
- Assign a random value to the initial weight of each node in the output layer;
- (2)
- Input the sample vector to the input layer;
- (3)
- Calculate the victory neurons. First calculate the distance between each node of the output layer and the input sample vector:Then choose the output node with the smallest distance as the winning node:
- (4)
- Update the weight. The formula is as follows:
- (5)
- Continue to the next step of training until the number of steps .
3.2.4. Five Basic Indicators for SOM Analysis
- (1)
- Internal expenditure of R&D expenses;
- (2)
- Ratio of R&D expenditure to local GDP;
- (3)
- Number of patent applications;
- (4)
- Number of patent authorizations;
- (5)
- GDP.
3.2.5. Data Processing
3.2.6. SOM Data Processing and GIS Visualization Processing
3.2.7. Extract Node Weights after SOM Data Processing
4. Results and Discussion
4.1. Results
4.1.1. Result Analysis of the Current Situation of Innovative Development of Urban Agglomeration
4.1.2. Analysis of the Research Results of the Theil Index Method
- (1)
- There is a significant innovation gap in China’s urban agglomerations as a whole; that is, regional innovation capabilities are not balanced.
- (2)
- The innovation gap between different agglomerations within China’s urban agglomerations is relatively small; that is, the gap in the innovation development level of different urban agglomerations is relatively small.
- (3)
- The innovation gap within each urban agglomeration is relatively large, and larger than the innovation gap between different urban agglomerations; that is, the imbalance of innovation development within urban agglomerations is greater than the imbalance of innovation development among urban agglomerations.
4.1.3. SOM Method Research Results
4.2. Discussion
- (1)
- Central cities, such as Beijing, Shanghai, Guangzhou, and Shenzhen; municipalities directly under the Central Government; and provincial capitals, have long gathered a large quantity of talents and resources. These urban areas have accumulated innovation ability and experience over a long period; as a result, it is difficult for surrounding small cities to catch up. In addition, according to the principles of the market economy, in response to the profit motive, talented individuals move from surrounding cities to the central city, which further exacerbates the innovation gap within urban agglomerations. This is the major reason why the imbalance in innovation development within urban agglomerations is greater than that between urban agglomerations. This also explains the small internal innovation gap of the Poyang Lake urban agglomeration, which does not have large cities, whereas the Wuhan urban agglomeration, which is centered on a large city, has a large internal innovation gap.
- (2)
- The innovation gap in urban agglomerations with strict administrative standards is even greater. This can be verified by the Beijing–Tianjin–Hebei urban agglomeration. Based on the analysis of the internal innovation connection diagram (Figure 3), the Beijing–Tianjin–Hebei urban agglomeration has applied for urban patents. The large gap in quantity is related to the stricter administrative standard of the development plans in the Beijing–Tianjin–Hebei region. Due to the resource allocation method of “strong government, weak market”, the policy gradient gap in the region is obvious, and results in significantly greater innovation resources in Beijing and Tianjin than in the surrounding cities and, therefore, a wider gap. On the contrary, the innovation difference in cities within the urban agglomeration of the Guangdong–Hong Kong–Macao Greater Bay Area, which operates according to “strong market, weak government”, is smaller.
- (3)
- Collaborative innovation development between regions will help narrow the innovation gap between cities. According to the central city theory explained in the first point, the innovation gap between cities in the Yangtze River Delta urban agglomeration, with Shanghai as the center, should be relatively large. However, the internal innovation gap of the Yangtze River Delta clusters is relatively small. The development of collaborative innovation among cities occurs within the triangle urban agglomeration. The Yangtze River Delta urban agglomeration has a more reasonable “center-periphery” gradient structure than other urban agglomerations. The relationship between Shanghai and surrounding cities is no longer an antagonistic and resource-competing relationship, but a mutually cooperative relationship. Through the reasonable division of labor and cooperation, the inner cities of the Yangtze River Delta urban agglomeration have formed a close community of interests. This will help reduce the innovation gap between internal cities and promote the collaborative development of innovation among these cities.
5. Conclusions
- (1)
- The hierarchical differentiation of the innovation development of China’s urban agglomerations is becoming increasingly clear, and there is a significant innovation gap overall. The problem of the imbalance in regional innovation development is pronounced; that is, regional innovation capabilities are not balanced.
- (2)
- The innovation gap between different urban agglomerations in China is relatively small; that is, the gap in the level of innovation and development of different urban agglomerations is relatively small.
- (3)
- The innovation gap between cities within each urban agglomeration is relatively large, and is significantly larger than the innovation gap between different urban agglomerations; that is, the imbalance in innovation development within urban agglomerations is greater than the imbalance in innovation development among urban agglomerations.
- (4)
- Central cities in urban agglomerations may squeeze the innovation resources of surrounding cities, leading to a widening in the innovation gap between cities. The irrational allocation of innovation resources in urban agglomerations with strong administrative standards will also further aggravate this gap. The coordinated development of innovation between regions can help narrow the innovation gap between cities.
Author Contributions
Funding
Data Availability Statement
Conflicts of Interest
References
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Urban Agglomerations | Cities under the Urban Agglomerations |
---|---|
Yangtze River Delta Urban Agglomeration | Shanghai, Nanjing, Wuxi, Changzhou, Suzhou, Nantong, Yancheng, Yangzhou, Zhenjiang, Taizhou in Jiangsu Province, Hangzhou, Ningbo, Jiaxing, Huzhou, Shaoxing, Jinhua, Zhoushan, Taizhou in Zhejiang Province, Hefei, Wuhu, Ma’anshan, Tongling, Anqing, Chuzhou, Chizhou, Xuancheng in Anhui Province |
Guangdong–Hong Kong–Macao Greater Bay Area Urban Agglomeration | Guangzhou, Shenzhen, Zhuhai, Foshan, Dongguan, Huizhou, Zhongshan, Jiangmen, Zhaoqing, Hong Kong, Macau |
Beijing–Tianjin–Hebei Urban Agglomeration | Beijing, Tianjin, Baoding, Tangshan, Langfang, Shijiazhuang, Qinhuangdao, Zhangjiakou, Chengde, Cangzhou, Xingtai, Handan in Hebei Province |
Central Plains Urban Agglomeration | Zhengzhou, Kaifeng, Luoyang, Xinxiang, Pingdingshan, Xuchang, Jiaozuo, Luohe and Jiyuan in Henan Province |
Shandong Peninsula Urban Agglomeration | Jinan, Qingdao, Zibo, Weifang, Dongying, Yantai, Weihai, Rizhao and Zouping counties in Shandong Province |
Chengyu Urban Agglomeration | Chongqing City, Chengdu, Mianyang, Deyang, Leshan, Meishan, Suining, Neijiang, Nanchong, Ziyang, Zigong, Yibin, Guang’an, Dazhou, Luzhou in Sichuan Province |
Wuhan Urban Agglomeration | Centered on Wuhan, the largest city in the central region, it covers an urban agglomeration composed of 8 large and medium-sized cities around Huangshi, Ezhou, Huanggang, Xiaogan, Xianning, Xiantao, Qianjiang, Tianmen, etc. |
Changzhutan Urban Agglomeration | Hunan Province: Parts of eastern and central Hunan centered on Changsha, Zhuzhou, Xiangtan, Hengyang, Yueyang, Yiyang, Changde, and Loudi |
Poyang Lake Urban Agglomeration | Nanchang, Jiujiang, Shangrao, Fuzhou, Jingdezhen, and Yingtan in Jiangxi Province |
Urban Agglomerations in China | Number of Cities | Average Value of Patent Applications | Rank | Average Value of Patents Authorized | Rank | Rank | |
---|---|---|---|---|---|---|---|
Yangtze River Delta Urban Agglomeration | 26 | 46241.577 | 1 | 26124.192 | 1 | 0.564 | 7 |
Guangdong-Hong Kong-Macao Greater Bay Area Urban Agglomeration | 11 | 35977.600 | 2 | 21046.253 | 2 | 0.585 | 4 |
Beijing-Tianjin-Hebei Urban Agglomeration | 12 | 34474.000 | 3 | 20096.750 | 3 | 0.583 | 5 |
Central Plains Urban Agglomeration | 9 | 12184.889 | 6 | 7323.778 | 6 | 0.601 | 3 |
Shandong Peninsula Urban Agglomeration | 9 | 21041.667 | 4 | 11891.000 | 4 | 0.565 | 6 |
Chengyu Urban Agglomeration | 15 | 12646.067 | 5 | 7963.600 | 5 | 0.630 | 2 |
Wuhan Urban Agglomeration | 9 | 11221.778 | 7 | 5722.556 | 7 | 0.510 | 9 |
Changzhutan Urban Agglomeration | 8 | 9912.125 | 8 | 5313.000 | 9 | 0.536 | 8 |
Poyang Lake Urban Agglomeration | 6 | 8726.667 | 9 | 5663.000 | 8 | 0.649 | 1 |
average value | 105 | 21380.707 | - | 12349.312 | - | 0.577 | - |
2019 | Patent Application | Patent Authorization | Patent Authorization/Patent Application | ||||||
---|---|---|---|---|---|---|---|---|---|
Urban Agglomerations | |||||||||
Yangtze River Delta Urban Agglomeration | 0.4174 | 0.4001 | 0.0093 | ||||||
Guangdong-Hong Kong-Macao Greater Bay Area Urban Agglomeration | 0.4284 | 0.1764 | 0.6227 | 0.3979 | 0.2481 | 0.691 | 0.0041 | 0.0081 | 0.0126 |
Beijing-Tianjin-Hebei Urban Agglomeration | 1.0194 | 1.0494 | 0.0237 | ||||||
Central Plains Urban Agglomeration | 0.6502 | 0.5913 | 0.0075 | ||||||
Shandong Peninsula Urban Agglomeration | 0.4463 | 0.4429 | 0.0045 | ||||||
Chengyu Urban Agglomeration | 1.1330 | 1.1749 | 0.0224 | ||||||
Wuhan Urban Agglomeration | 1.2108 | 1.2119 | 0.0290 | ||||||
Changzhutan Urban Agglomeration | 0.5084 | 0.4995 | 0.0068 | ||||||
Poyang Lake Urban Agglomeration | 0.2360 | 0.1912 | 0.0035 |
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Wang, X.; Wan, T.; Yang, Q.; Zhang, M.; Sun, Y. Research on Innovation Non-Equilibrium of Chinese Urban Agglomeration Based on SOM Neural Network. Sustainability 2021, 13, 9506. https://doi.org/10.3390/su13179506
Wang X, Wan T, Yang Q, Zhang M, Sun Y. Research on Innovation Non-Equilibrium of Chinese Urban Agglomeration Based on SOM Neural Network. Sustainability. 2021; 13(17):9506. https://doi.org/10.3390/su13179506
Chicago/Turabian StyleWang, Xiaohua, Tianyu Wan, Qing Yang, Mengli Zhang, and Yingnan Sun. 2021. "Research on Innovation Non-Equilibrium of Chinese Urban Agglomeration Based on SOM Neural Network" Sustainability 13, no. 17: 9506. https://doi.org/10.3390/su13179506
APA StyleWang, X., Wan, T., Yang, Q., Zhang, M., & Sun, Y. (2021). Research on Innovation Non-Equilibrium of Chinese Urban Agglomeration Based on SOM Neural Network. Sustainability, 13(17), 9506. https://doi.org/10.3390/su13179506