营商环境驱动东北地区城市区域创新绩效研究--基于模糊集定性比较分析

优化东北地区的营商环境,提升东北地区区域创新绩效,是推进城市高质量发展亟待解决的重要问题。有必要利用CiteSpace对现有文献进行可视化处理,结合东北地区城市发展现状,对黑、吉、辽三个省份34个地级市的区域创新绩效进行分析,在组态视角下运用模糊集定性比较分析法,探寻出提升区域创新绩效的两条驱动路径。研究发现:单个营商环境无法充当高水平区域创新绩效的必要条件,高水平区域创新绩效需要多条件共同推动,各条件组合可以多种形式提高区域创新绩效水平;存在人力资源、市场和金融服务驱动型及公共服务驱动型两条提高区域创新绩效的路径;三类营商环境影响区域创新绩效的提高;营商环境各方面均表现有所欠缺或金融环境不足会对区域创新绩效的提升造成阻碍。

东北地区城市观花树种选择及应用浅析

随着东北城市建设的不断发展,园林绿化越来越受到人们的重视。由于观花树种,枝叶繁茂、满树皆花、香气怡人,观赏性极强,是城市园林绿化中最亮丽的一道风景。针对东北地区的气候特点及城市街道的环境条件,对观花树种的选择和应用做了分析,通过合理配植,提高城市绿化景观设计的多样性,形成符合地方特色和历史文化风貌的城市绿化景观。

东北地区城市群高质量发展研究

文章从协调发展的视角探讨东北地区城市群发展现状,构建城市群高质量发展耦合协调模型,明确了耦合协调类型的划分依据,测度并分析了东北地区城市群经济规模、产业结构与资源环境耦合协调度及其发展趋势、类型、效应和特征。研究结果表明:合理适度的经济规模是城市群高质量发展的基础;产业结构优化升级是城市群高质量发展的表现;资源环境受经济规模变化和产业结构调整的影响,同时又支撑和约束城市群的高质量发展;资源环境、经济规模和产业结构之间既相互影响又相互制约。文章据此提出东北地区城市群高质量发展的政策建议。

Conceptualizing and Measuring Economic Resilience of Resource-based Cities： Case Study of Northeast China

This paper develops a conceptual model and an indicator system for measuring economic resilience of resource-based cities based on the theory of evolutionary resilience and the related concepts of persistence, adaptation, and transformation. Nineteen resource-based cities in Northeast China were analyzed using the indicator system. The results showed that Liaoning and Jilin provinces had higher economic resilience than Heilongjiang Province. Panjin, Benxi, and Anshan in Liaoning Province were the top three cities, while Shuangyashan and other coal-based cities in Heilongjiang Province ranked last. Metals-and petroleum-based cities had significantly higher resilience than coal-based cities. The differences in persistence, adaptability, transformation, and resilience among resource-based cities decreased since the introduction of the Northeast Revitalization Strategy in 2003. Forestry-based cities improved the most in terms of resilience, followed by metals-based and multiple-resource cities; however, resilience dropped for coal-based cities, and petroleum-based cities falling the most. The findings illustrate the importance and the way to develop a differentiated approach to improve resilience among resource-based cities.

Relationship Between Social Economic Agglomeration and Labor Productivity of Core Cities in Northeast China

Dalian, Shenyang, Changchun and Harbin are the four core cities which play an essential role in terms of promoting the economic development in Northeast China. In this paper, the impact of urban agglomeration on labor productivity is explored by making comparisons among these four cities. The model used for analysis is a classical model derived from previous studies. Some indicators, such as population density and economic density, were selected to examine the impact of urban agglomeration on the labor productivity based on the time-series data for the four cities from 1990 to 2007. The four main conclusions are： l） The promotion from the growth rate of population density on the growth rate of labor productivity is limited. 2） The negative relationship exists between the growth rate of employment density and the growth rate of labor productivity. 3） Agglomeration effect exists in the four cities, the highest one is Dalian, Shenyang takes the second place, followed by Changchun and Harbin, and the predominant promotion exerted on the labor productivity is the output density.

Effects of Forest Type and Urbanization on Carbon Storage of Urban Forests in Changchun, Northeast China

Rapid urbanization has led to dramatic changes in urban forest structures and functions, and consequently affects carbon(C) storage in cities. In this study, field surveys were combined with high resolution images to investigate the variability of C storage of urban forests in Changchun, Northeast China. The main objectives of this study were to quantify the C storage of urban forests in Changchun City, Northeast China and understand the effects of forest type and urbanization on C storage of urban forests. The results showed that the mean C density and the total C storage of urban forests in Changchun were 4.41 kg/m2 and 4.74 × 108 kg, respectively. There were significant differences in C density among urban forest types. Landscape and relaxation forest(LF) had the highest C density with 5.41 kg/m2, while production and management forest(PF) had the lowest C density with 1.46 kg/m2. These differences demonstrate that urban forest type is an important factor needed to be considered when the C storage is accurately estimated. Further findings revealed significant differences in different gradients of urbanization, and the mean C density decreased from the first ring(6.99 kg/m2) to the fourth ring(2.87 kg/m2). The total C storage increased from the first ring to the third ring. These results indicate that C storage by urban forests will be significantly changed during the process of urbanization. The results can provide insights for decision-makers and urban planners to better understand the effects of forest type and urbanization on C storage of urban forests in Changchun, and make better management plans for urban forests.

Cartography of Air Pollution in an Industrial City in North-Eastern Algeria by Using Two Indexes： Poleotolerance Index and Atmospheric Purity Index

Of all the methods of studies on bio-estimation of air pollution by lichen flora, the authors cannot justify a choice of one method over another. Consultation of previous work by researchers has allowed us to compare these methods and to better understand their strengths and limitations. Under the terms of estimating the pollution, these methods are classified into three categories. Some are qualitative, quantitative and others are finally some indirect methods. The methods used to assess the overall air pollution relative value for each station studied. As part of our work, the authors have chosen a quantitative approach based on the combination of two methods. They are based on pollution indices obtained from mathematical formulas based on various parameters related to the lichen flora. They are represented by the I.P. （index poleotolerance） and the I.A.P. （index of atmospheric purity） and these two indices allowed us to map of global air pollution in the city of Skikda and petrochemical industry as well as peri-urban areas （Haddaiek, Hamadi Krouma, Hamrouche Hamoudi, Larbi Ben M＇Hidi）. The authors have identified areas of iso-pollution around different emission centers represented by the largest petrochemical area, traffic and households in urban areas of Skikda, Hamadi Krouma, Hamrouche Hamoudi and Larbi Ben M＇Hidi.

Semi-urbanization and evolving patterns of urbanization in China: Insights from the 2000 to 2010 national censuses

Based on the prefecture-level data of the 2000 and 2010 national censuses, the spatial evolution of China's semi-urbanization is analyzed in this study. The stages of urbanization are re-examined by considering semi-urbanization. Nine types of urban development are presented according to the relations between semi-urbanization and urbanization, and China's urbanization is divided into five stages, namely, high incoordination, incoordination, low coordination, coordination, and high coordination. Results show that China's semi-urbanization rate varies significantly from one area to another; its order in 2010 from the highest to the lowest value was as follows: east, middle, west, and northeast. Urbanization and semi-urbanization rates in inland cities increase much faster than those in coastal cities. In addition, semi-urbanization displays a spatial pattern similar to that of urbanization across China, with the sole exception of the northeastern region. Through a spatial autocorrelation analysis, the spatial concentration of semi-urbanization is determined to be increasing. High-value concentration areas are expanding in the coastal east, whereas low-value concentration areas are growing in the northeast. Lastly, the evolution of China's urbanization model suggests a weakening trend of coordination between urbanization and semi-urbanization over the studied decade. Semi-urbanization can be viewed as a special production of China's hukou system, which restricts the permanent settlement of migrants in cities. As such, China's semi-urbanization trend is expected to exhibit a reversed U-shaped pattern as urbanization and citizenization develop.