Economic Circle Research Articles

Valorization of agro-industry wastes for nanocellulose fabrication and its multifunctional applications

Nanocellulose (NC) isolation from different types of agroindustrial wastes is emerging as ital. Field of research, because of its multifunctional applications. This work uses the VOS viewer software for extracting the agroindustry based nanocellulose production. This review specifically grasps the attention of scientists towards on valorization of agricultural wastes as sources for nanocellulose production. It also explores the variety of sources including vegetables, fruits, cereals and nuts. The ecological system is negatively influenced by the chemicals and its derived products; these products have caused the ecological imbalance. The demand for functional materials and fine chemicals made from natural resources is enormous. NC is considered as one of the promising green material and next generation renewable resource. Further, this work describes about the pre-treatment, characterization and synthesis of nanocellulose from agro-industrial waste using mechanical, chemical and enzymatic methods. It also elaborate the management of agricultural wastes for the purpose of reducing environmental impact, use of fossil based fuel resources, assuring the sustainable economic growth and close the circle of green economy and its resource use. In addition, the potential and versatile applications of nanocellulose from diverse industrial and agricultural sources were discussed.

Research on the Evaluation of Comprehensive Logistics Capacity of Major Ports in Chengdu-Chongqing Economic Circle

Under the new development pattern with domestic circulation as the main body and domestic and international dual circulation promoting each other, it has become the general trend to promote the construction of the Chengdu-Chongqing Twin Cities Economic Circle and deeply integrate into the development of the Yangtze River Economic Belt. Located in the upper reaches of the Yangtze River, the Chengdu-Chongqing Economic Circle is an important hub connecting the east and west, and its port has become an important strategic resource for the economic development of the hinterland. Although the port has developed rapidly in recent years, there are still many shortcomings in the face of new situations and new requirements. By establishing an evaluation index system and using the entropy weight-TOPSIS method to evaluate the comprehensive logistics capacity of the main ports in the Chengdu-Chongqing Economic Circle, this paper finds that each port has problems such as unbalanced development and the level of collection and distribution to be improved, and gives corresponding countermeasures to provide reference for the future development and construction of inland ports.

Pollution emission right trading policy and green total factor productivity

ABSTRACT Improving the quality of the ecological environment and the efficiency of green economy has become the new demands of China’s economic development. This paper takes the 2007 sulphur dioxide (SO2) emission trading pilot policy in China as a quasi-natural experiment, measures the green total factor productivity of 280 Chinese cities, and analyses the impact of emission right trading policy on urban green total factor productivity (GTFP). The results show that emission right trading policy has a significant role in improving urban GTFP. This effect differs at region, city level and economic circle. Emission right trading policy improves urban GTFP by promoting green technological innovation, improving resource allocation efficiency and optimising industrial structure. This paper shows a new perspective on cross regional and cross city emissions trading cooperation, providing policy enlightenment for deepening China’s environmental governance and promoting green and high-quality economic development.

Spatial-temporal characteristics and influencing factors of carbon emission in Chengdu-Chongqing area: an urban transportation perspective.

The Chengdu-Chongqing twin-city economic circle is a vital growth pole and a new power source for Chinese high-quality development. Studying the spatial-temporal characteristics of carbon emissions and the role of factors affecting them under the transportation perspective is of great significance for this region to realize the carbon peak and carbon neutrality and to formulate carbon emission reduction policies. We use the exploring spatial data analysis (ESDA) and spatial regression model combined with the STIRPAT model, and research finding: (1) The total carbon emissions in the research area gradually increased from 2014 to 2020, but the growth rate showed a significant decline in 2019. (2) There is significant spatial heterogeneity of carbon emissions in the study area; the hotspot areas of total carbon emissions are in Chongqing and Chengdu, forming a high-low aggregation of carbon emissions. Per capita carbon emissions show a high trend in the southwest and a low in the northeast. (3) From the factors of transportation perspective, highway density and private vehicles have a positive impact on carbon emissions, and urban road areas and public transportation have a very significant inhibition of carbon emissions and a spatial spillover effect. (4) Other factors, such as population size, national economic development, urbanization level, and industrial structure, all have a positive effect on carbon emissions, and disposable income has a negative effect on carbon emissions.

Regional differences and dynamic evolution of high-quality development in service industry: A case study of the Chengdu-Chongqing economic circle.

The high-quality development of service industry has become an important engine for promoting sustainable economic development. This paper first constructed the evaluation index system of high-quality development of service industry, based on panel data from 2005 to 2020. Second, Kernel density, Markov chain and Dagum Gini coefficient were used to represent the regional differences and dynamic evolution of service industry, and the Koo method was used to explore the characteristics of spatial agglomeration. Finally, social network analysis was used to identify core indicators. The study found that: (1) From 2005 to 2020, the overall level of service industry first decreases and then increases, with Chengdu and Chongqing leading other cities. (2) The development of service industry in the CCEC has large spatial differences, mainly due to inter-regional differences. (3) The level of spatial agglomeration is less variable, with high agglomeration mainly in Chengdu. (4) Indicators such as the level of human capital are the core factors of its high-quality development. This study is of great theoretical and practical significance for the optimization and upgrading of service industry in the CCEC and the synergetic development of the region.

Comprehensive evaluation and spatial-temporal evolution characteristics of urban resilience in Chengdu-Chongqing Economic Circle

To clarify the connotations and extensions of urban resilience, this study focuses on the Chengdu-Chongqing Economic Circle with 16 cities as research subjects. A comprehensive evaluation index system was constructed to measure the resilience of each city from 2003 to 2020. The spatial-temporal evolution characteristics were analyzed using Kernel density estimation, standard deviation ellipse, and spatial Markov chain analysis, and the spatial Tobit model was introduced to discover the influencing factors. The results indicate the following: ① Urban resilience in the Chengdu-Chongqing Economic Circle displays an upward trend, with the center of gravity moving to the southwest, and the polarization phenomenon intensifying. ② The urban resilience level in a region has certain spatial and geographical dependence, while the probability of urban resilience transfer differs in adjacent cities with different resilience levels. ③ Urban centrality, economic scale, openness level, and financial development promote urban resilience, whereas government scale significantly inhibits it. Finally, this paper proposes countermeasures and suggestions to improve the urban resilience of the Chengdu-Chongqing Economic Circle.

Regional differences in health resource allocation: a longitudinal study in the Chengdu-Chongqing economic circle, China

ObjectiveTo analyse regional differences in health resource allocation in the Chengdu-Chongqing economic circle.DesignA longitudinal analysis that collected data on health resource allocation from 2017 to 2021.SettingThe number of beds, health...

Sustainable Coordination and Development of S&T Innovation and New Urbanization: An Empirical Study of Cheng-du-Chongqing Dual-City Economic Circle, China

Sustainable Coordination and Development of S&T Innovation and New Urbanization: An Empirical Study of Cheng-du-Chongqing Dual-City Economic Circle, China

A spatial econometric investigation into road traffic accessibility and economic growth: insights from the Chengdu-Chongqing twin-city economic circle

A prevailing question in contemporary transport research queries the contribution of transport infrastructure investment to regional and local economic growth. Notably, the benefits under consideration extend beyond travel-time savings to possible additional developmental benefits. Centering on the Chengdu-Chongqing twin-city economic circle, this study sheds light on this issue. It presents a comprehensive approach involving economic, investment, and political-institutional conditions, and underscores their synergistic operation in eliciting measurable economic benefits. We delve into the effects of road traffic accessibility on economic growth in 2019, using accessibility indicators integrated into a spatial econometric model. Our research relied on robust indicators of road traffic accessibility, transportation investments, and economic outputs from the Chengdu-Chongqing region. The study demonstrates that the road traffic network’s development level is higher in the central area compared to the peripheral regions. Further, it reveals an uneven economic development distribution within the circle. Moreover, the spatial effect of road traffic on economic growth surfaces as an error term spatial interaction effect, highlighting accessibility’s pivotal role. Factors like industrial infrastructure, labor force, and new economic geography also significantly affect growth. To wrap up, we discuss the broader implications of our findings. We suggest a stronger connection between road transportation and economic growth and stress the need to enhance the supporting economic environment. Our findings have broader implications, guiding policy and planning in other urban economic circles.

How changes in landscape patterns affect the carbon emission: a case study in the Chengdu-Chongqing Economic Circle, China.

The construction of low-carbon cities is an optimal means to balance the competing interests of economic growth and carbon emission reduction. This study focuses on the optimization of land use patterns with a low carbon orientation, taking the Chengdu-Chongqing Economic Circle (CCEC), the fourth-largest economic growth pole in China, as an example. The panel data regression analysis is carried out to identify the dynamic correlations between the landscape changes and the carbon emission induced by land use and land cover change (LICE) of each city, each year, for the last 20 years. The results show that the CCEC has witnessed a 142.85% increase in carbon emissions during the period studied, with the growth of built-up land contributing 94% of total carbon emissions from 2000 to 2020. By constructing the panel regression model, this study finds that the intensity of carbon emissions increases significantly as the urban built-up land area and the agglomeration of artificial structures increase. The conversion of cropland, which dominates the landscape pattern, to built-up land has led to further fragmentation of the landscape pattern and a reduction in LPI, thus increasing carbon emissions. And a more complex regional landscape pattern will have a positive impact on carbon emission reduction. Based on the above findings, suggestions are articulated for carbon emission reduction.

An Evaluation and Difference Analysis of the High-Quality Development of China’s Marine Economy

The marine economy is a vital component of boosting the high-quality development of the Chinese economy. According to the concept of high-quality development, we construct the evaluation indicator system to measure the level of high-quality development of the marine economy by means of the combined empowerment method. We explore the coupling coordination relationship and evolution trend with the coupling coordination degree model, and finally, we analyze the regional differences using the Dagum Gini coefficient. The results show that, (1) from the perspective of time, China’s marine economic high-quality development index has been steadily improving, but there is still great potential for progress. From the perspective of spatial characteristics, the eastern marine economic circle has the best level of high-quality economic development. (2) From 2012 to 2022, the coupling coordination degree of high-quality development of the marine economy experienced five stages, from the verge of disorder to finally stepping into the good coupling coordination stage. (3) The overall difference in the marine economy is gradually narrowing. Among the three major marine economic circles, the southern marine economic circle has the largest internal discrepancy, which has become an important factor affecting the high-quality development of the marine economy. The above research results helped relevant decision-making departments to deeply understand the status quo and outstanding contradictions of the high-quality development of the marine economy in China.

新发展理念下成渝双城经济圈体育旅游高质量融合发展研究

新发展理念下成渝双城经济圈体育旅游高质量融合发展研究

Research on Development Trend and Integrated and Coordinated Development of Chengdu-Chongqing Double-City Economic Circle Based on Entropy Method and Coupling Coordination Model

Research on Development Trend and Integrated and Coordinated Development of Chengdu-Chongqing Double-City Economic Circle Based on Entropy Method and Coupling Coordination Model

Study on coupling coordination between ecosystem service value and carbon reserve based on land use change - taking Chengdu-Chongqing economic circle as an example

Study on coupling coordination between ecosystem service value and carbon reserve based on land use change - taking Chengdu-Chongqing economic circle as an example

Level measurement and influencing factors of the obstacle to factor flow in the Chengdu-Chongqing Economic Circle

Level measurement and influencing factors of the obstacle to factor flow in the Chengdu-Chongqing Economic Circle

Study on the Employment Intention and Influencing Factors of College Graduates in Chengdu-Chongqing Region under the Background of “Talent Competition”

Abstract In recent years, China has set off a round of “war for talents” all over the world, and college graduates, as a high-quality group of people in the labor market, are the focus of the competition for talent across the globe. How to retain and attract college students is an essential issue in promoting the construction of the Chengdu-Chongqing Twin Cities Economic Circle. An employment prediction algorithm for graduates is proposed in this paper that employs the HMIGW algorithm for feature selection to obtain the optimal feature subset. Then, it uses the XGBoost algorithm to predict the employment situation. In the meantime, a method for selecting fractal dimension attributes based on the binary firefly algorithm is used, and an algorithm for extracting employment willingness influence factor is proposed. In the analysis of the employment intention of college graduates in the Chengdu-Chongqing region, the number of college graduates in 2023 is 366,000; the growth reaches 18.83%, but the number of college graduates who stay in local employment is only 112,000. The mean value of all indicators for college graduates in the Chengdu-Chongqing region is below 4, and their overall satisfaction is low. The group not willing to stay in the area for employment valued the soft environment of the unit (P=0.012) and the economic level of the region (P=0.024) more than the group willing to stay in the area for employment.

Study on coupling coordination between ecosystem service value and carbon reserve based on land use change - taking Chengdu-Chongqing economic circle as an example

Study on coupling coordination between ecosystem service value and carbon reserve based on land use change - taking Chengdu-Chongqing economic circle as an example

The inner logic and path choice of high quality collaborative development of higher education in Chengdu-Chongqing economic circle

The inner logic and path choice of high quality collaborative development of higher education in Chengdu-Chongqing economic circle

Research on the Development Model and Countermeasures of Sports Industry and Regional Economy in the Chengdu-Chongqing Economic Circle

Research on the Development Model and Countermeasures of Sports Industry and Regional Economy in the Chengdu-Chongqing Economic Circle

Research on Higher Education Clusters and Differentiation Strategies of New Undergraduate Colleges and Universities in the Chengdu-Chongqing Economic Circle

Research on Higher Education Clusters and Differentiation Strategies of New Undergraduate Colleges and Universities in the Chengdu-Chongqing Economic Circle