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Entrepreneurial Orientation and Innovation Ecosystems in the Industrial Sector, Central Region, Kampala, Uganda: A Review
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作者 Serunjoji Ismah 《Open Journal of Applied Sciences》 2023年第12期2447-2460,共14页
This review explores entrepreneurial orientation and innovation ecosystems in the industrial sector of the Central Region, Kampala, Uganda, through an analysis of ten scholarly articles. The study contextualizes the r... This review explores entrepreneurial orientation and innovation ecosystems in the industrial sector of the Central Region, Kampala, Uganda, through an analysis of ten scholarly articles. The study contextualizes the research within the regional landscape and establishes a theoretical framework through a focused literature review. Key findings highlight the intersection of entrepreneurial activities and innovation dynamics, emphasizing the region’s unique contributions to the broader field. Discussions on discrepancies and unexplored territories within the articles offer insights into limitations and research gaps. The manuscript concludes by identifying future research avenues, providing a roadmap for ongoing inquiry into the entrepreneurial and innovative dimensions of the Central Region’s industrial sector. This synthesis underscores the importance of cultivating an entrepreneurial mindset and collaborative innovation strategies for sustainable industrial development in the region. 展开更多
关键词 Entrepreneurial Orientation Innovation Ecosystems Industrial Sector central region Kampala Uganda Mixed Methods Collaborative Networks Proactiveness Risk-Taking Competitive Aggressiveness
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Characteristics of seismic reflections in central region of the South China Sea and their geological significance 被引量:1
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作者 刘建华 金翔龙 《Acta Oceanologica Sinica》 SCIE CAS CSCD 2000年第3期103-113,共11页
More than 4 000 km 48-channel seismic reflection data from the central region of the South China Sea have been interpreted. Five seismic interfaces have been distinguished, named T1, T2, T4, T6 and Tg respectively Mea... More than 4 000 km 48-channel seismic reflection data from the central region of the South China Sea have been interpreted. Five seismic interfaces have been distinguished, named T1, T2, T4, T6 and Tg respectively Meanwhile, five seismic sequences numbered I - V have been divided with the ages of Quaternary and Pliocene, Later Mocene, Earlier and Middle Miocene, Oligocene and Pre- Oligocene separately. Sequences I-II overlie all parts of the area. In the continental slope and island slope, Sequences III-V are mainly found in the grabens. Sequence III is found at moot profiles of the deep-sea basin, and Sequnce IV is seen not only at the margins of the east subbasin but also at the margins of the southwest subbasin. Strong reflection from Moho is found at most profiles of the deep-sea basin. The depth of Moho varies between 10 and 12 km, with a thickness of 6- 8 km for the crust. Calculated by age-basement depth correlation formula, the age of basaltic basement in the southwest subbasin is 51-39 Ma. It is indicated that the evolution of the southwest subbasin is simultaneous with or earlier than that of the east subbasin. 展开更多
关键词 central region of the South China Sea seismic reflection evolution of the back-arc basin
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Comparative Assessment of the Proximate and Mineral Composition of <i>Cucumis sativus</i>L. and <i>Solanum aethiopicum</i>L. Fruit Samples Grown in South Eastern and North Central Regions of Nigeria Respectively
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作者 H. C. Okeke O. Okeke +2 位作者 K. O. Nwanya C. R. Offor C. C. Aniobi 《Natural Resources》 2021年第8期237-249,共13页
<span style="font-family:""><span style="font-family:Verdana;">Studies were carried out to comparatively assess the proximate and mineral composition of </span><i><s... <span style="font-family:""><span style="font-family:Verdana;">Studies were carried out to comparatively assess the proximate and mineral composition of </span><i><span style="font-family:Verdana;">Solanum aethiopicum </span></i><span style="font-family:Verdana;">L.</span><i> </i><span style="font-family:Verdana;">and </span><i><span style="font-family:Verdana;">Cucumis</span></i> <i><span style="font-family:Verdana;">sativus</span></i><span style="font-family:Verdana;"> L. fruit samples grown in the South Eastern and North Central regions of Nigeria respectively, following standard analytical procedures and instrumentation. The mineral elements (Na, K, Zn and Ca) were determined using atomic absorption spectrophotometer after wet digestion of the samples while the proximate parameters</span><i> </i><span style="font-family:Verdana;">(ash content, moisture content, crude fibre content, crude protein content, crude fat content and carbohydrate content) were determined in accordance with standard analytical procedures. The mean range of the moisture, crude fibre, crude protein, crude fat, ash and carbohydrate contents in the </span><i><span style="font-family:Verdana;">S. aethiopicum </span></i><span style="font-family:Verdana;">L.</span><i> </i><span style="font-family:Verdana;">fruit samples grown in the North Central and South Eastern regions of Nigeria were 72</span></span><span style="font-family:Verdana;">.</span><span style="font-family:Verdana;">49</span><span style="font-family:Verdana;"> -</span><span style="font-family:Verdana;"> 88</span><span style="font-family:Verdana;">.</span><span style="font-family:Verdana;">23, 2.15</span><span style="font-family:""> </span><span style="font-family:Verdana;">- 3.67, 1.31</span><span style="font-family:""> </span><span style="font-family:""><span style="font-family:Verdana;">- 1.85, 0.43 - 0.76, 0.51 - 0.84 and 3.18% - 5.72% respectively. Additionally, the moisture, crude fibre, crude protein, crude fat, ash and carbohydrate contents in the </span><i><span style="font-family:Verdana;">Cucumis sativus </span></i><span style="font-family:Verdana;">L.</span><i> </i><span style="font-family:Verdana;">fruit</span><i> </i><span style="font-family:Verdana;">samples grown in the South Eastern and North Central regions of Nigeria, had mean range of values of 93.60 - 98.76, 0.53 - 0.77, 2.14 - 2.84, 0.29 </span></span><span style="font-family:Verdana;">-</span><span style="font-family:Verdana;"> 0.46, 0.90 </span><span style="font-family:Verdana;">-</span><span style="font-family:Verdana;"> 1.14 and 3.88% </span><span style="font-family:Verdana;">-</span><span style="font-family:""><span style="font-family:Verdana;"> 4.66% respectively. The range of mean values of Na, K, Zn and Ca in the </span><i><span style="font-family:Verdana;">S. aethiopicum </span></i><span style="font-family:Verdana;">L.</span><i> </i><span style="font-family:Verdana;">fruit samples from the South Eastern and North Central regions of Nigeria were 0.36 - 0.57, 1.92 - 2.80, 0.84 - 1.01 and 0.43 - 0.61 μg/g respectively. Also, Na, K, Zn and Ca</span><i> </i><span style="font-family:Verdana;">had mean range of values of 1.36 </span></span><span style="font-family:Verdana;">-</span><span style="font-family:Verdana;"> 4.08, 10.16 - 13.09, 0.45 - 0.66 and 5.85 - 9.3</span><span style="font-family:""> </span><span style="font-family:""><span style="font-family:Verdana;">μg/g respectively in the </span><i><span style="font-family:Verdana;">C. sativus </span></i><span style="font-family:Verdana;">L. fruit samples grown in the South Eastern and North Central regions in Nigeria. The levels of the determined proximate of parameters</span><i> </i><span style="font-family:Verdana;">and mineral elements in the studied fruit samples from the investigated regions of Nigeria were statistically significant. This therefore indicates that the geographical locations where these fruit samples grew could have significantly impacted on their nutrient content levels. The levels of the determined proximate</span><i> </i><span style="font-family:Verdana;">parameters from the selected regions of Nigeria show</span></span><span style="font-family:Verdana;">s</span><span style="font-family:""><span style="font-family:Verdana;"> that consumption of the fruit samples (</span><i><span style="font-family:Verdana;">S aethiopicum </span></i><span style="font-family:Verdana;">L. and</span><i><span style="font-family:Verdana;"> C. sativus </span></i><span style="font-family:Verdana;">L.)</span><i> </i><span style="font-family:Verdana;">especially regularly, would help supply the essential nutrients and minerals required for a healthy living. 展开更多
关键词 Solanum aethiopicum L. Cucumis sativus L. Proximate Parameters Mineral Elements South Eastern region and North central region
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Comparative Assessment of the Phytochemical and Selected Heavy Metal Levels in <i>Cucumis sativus</i>L. and <i>Solanum aethiopicum</i>L. Fruit Sample Grown in South Eastern and North Central Regions of Nigeria Respectively
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作者 C. C. Aniobi O. Okeke +2 位作者 E. Ezeh H. C. Okeke K. O. Nwanya 《Natural Resources》 2021年第8期223-236,共14页
<span style="font-family:""><span style="font-family:Verdana;">Studies were carried out to comparatively assess the phytochemical and heavy metal levels in </span><i>&l... <span style="font-family:""><span style="font-family:Verdana;">Studies were carried out to comparatively assess the phytochemical and heavy metal levels in </span><i><span style="font-family:Verdana;">Solanum aethiopicum </span></i><span style="font-family:Verdana;">L. and </span><i><span style="font-family:Verdana;">Cucumis sativus </span></i><span style="font-family:Verdana;">L. fruit samples grown in the South Eastern and North Central regions of Nigeria respectively using standard analytical procedures and instrumentation. The fruit samples were assayed for selected heavy metals (Pb, Cd and Cu) using atomic absorption spectrophotometer after wet digestion of the samples. The five detected phytochemicals (flavonoids, alkaloids, terpenoids, saponins and glycosides) were present at varying amounts in the investigated fruit samples from the South Eastern and North Central regions of Nigeria. The range of mean values of flavonoids, terpenoids, saponins and glycosides in the </span><i><span style="font-family:Verdana;">S. aethiopicum </span></i><span style="font-family:Verdana;">L. fruit samples from the two studied regions were 0.50 - 0.57, 0.53 - 1.26, 0.44 - 0.78, 1.12 - 1.93 and 0.40 - 0.50 mg/g respectively. The range of mean values of flavonoids, alkaloids, terpenoids, saponins and glycosides in the </span><i><span style="font-family:Verdana;">C. sativus </span></i><span style="font-family:Verdana;">L.</span><i> </i><span style="font-family:Verdana;">fruit samples from the two studied regions of Nigeria were 1.27 - 1.69, 0.53 - 0.55, 0.96 - 1.51, 0.41 - 0.83 and 0.90 - 1.74 mg/g respectively. The range of mean vales of Pb, Cd, and Cu in the </span><i><span style="font-family:Verdana;">S. aethiopicum </span></i><span style="font-family:Verdana;">L. fruit samples from the two studied regions were 0.15 - 0.24, 0 - 0.01, 0.78 - 1.12 μg/g respectively. 0.31 - 0.40, 0.02 - 0.05 and 0.62 -</span></span><span style="font-family:""> </span><span style="font-family:""><span style="font-family:Verdana;">0.96 μg/g were the range of mean values of Pb, Cd and Cu</span><i> </i><span style="font-family:Verdana;">respectively in the </span><i><span style="font-family:Verdana;">C. sativus </span></i><span style="font-family:Verdana;">L.</span><i> </i><span style="font-family:Verdana;">fruit samples from the two studied regions of Nigeria. Of the three investigated heavy metals, only Cd was at toxic levels in the </span><i><span style="font-family:Verdana;">C. sativus </span></i><span style="font-family:Verdana;">L. fruit samples from the South Eastern and North Central regions of Nigeria. This is therefore a health concern to the fruit consumers that includes these fruits in their habitual daily fruit diets. Although the therapeutic and pharmaceutical benefits that </span></span><span style="font-family:Verdana;">would</span><span style="font-family:Verdana;"> be derived from consuming</span><span style="font-family:Verdana;">,</span><span style="font-family:Verdana;"> the investigated fruit samples ha</span><span style="font-family:Verdana;">s</span><span style="font-family:Verdana;"> been shown in this study, there is therefore a possible risk of undue exposure to environmental pollutants such as heavy metal, especially through growing these fruits in polluted soils resulting from unwholesome anthropogenic practices. For fruit consumers to derive maximum health benefits from consuming these fruits, pollutants like heavy metals must be at non-toxic levels and this can only be achieved by ensuring that these fruits samples are grown and harvested in environments with less anthropogenic activities. 展开更多
关键词 Cucumis sativus L. Solanum aethiopicum L. Phytochemicals and Heavy Met-als North central region and South Eastern region
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On Willingness of Rural Land Circulation and Securitization in Central Regions of China 被引量:1
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作者 Jianxin LU Yuwei SU 《Asian Agricultural Research》 2014年第3期36-41,共6页
On the basis of questionnaire survey in 54 natural villages of 22 cities( counties) in 6 central region provinces,this paper analyzed the willingness of rural land circulation and securitization and influencing factor... On the basis of questionnaire survey in 54 natural villages of 22 cities( counties) in 6 central region provinces,this paper analyzed the willingness of rural land circulation and securitization and influencing factors with the aid of Logistic model and Multinomial Logit model.The study indicates that factors influencing willingness of rural land circulation and securitization mainly include land contract method,land circulation information and approaches,rights and interests of farmers infringed or not,policies of benefiting farmers,and non-agricultural skills. Finally,it came up with following pertinent policy recommendations:( 1) reforming and improving land contract methods;( 2)strengthening disclosure of land circulation information;( 3) reforming and improving land circulation approaches;( 4) strengthening protection of farmers' rights and interests in the process of land circulation;( 5) reinforcing and implementing policies benefiting farmers;( 6) cultivating and developing farmers' non-agricultural skills. 展开更多
关键词 RURAL LAND CIRCULATION LAND SECURITIZATION Logisti
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Geospatial Technology Potentials in Reawakening the Consciousness of Soil Distribution in Nigeria’s North-Central Region and Mediating the Herdsmen-Farmers Conflicts
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作者 Ugonna C. Nkwunonwo Francis I. Okeke +1 位作者 Emmanuel N. Chiemelu Elijah S. Ebinne 《Journal of Geoscience and Environment Protection》 2019年第2期156-175,共20页
The pervasive herdsmen-farmers conflicts in the north-central region of Nigeria have changed the narrative of Nigeria’s enduring ethnic crises to ideologies, which are in-controvertibly sinister. The consequences of ... The pervasive herdsmen-farmers conflicts in the north-central region of Nigeria have changed the narrative of Nigeria’s enduring ethnic crises to ideologies, which are in-controvertibly sinister. The consequences of this tension, which has defied possible military responses, political, religious and cultural strategies are potentially devastating, not just for Nigeria, but the whole of West African region. Since the particular nature of these conflicts increasingly highlights the significance and inevitability of land resources for crops farming and cattle rearing, it is imperative to create awareness of the elemental nature of soils, especially their diversities in these conflict-prone areas. This study’s objective was to produce a Geographic Information System (GIS) based digital soil map (DSM) of the north-central region of Nigeria, and to delineate soil distribution and unique properties. Based on this study, the DSM offers a quick access to quantitative soil data covering the study area. It indicates that soil mapping units 15d, 18d and 24b are dominant, and constitute about 40% of the local arable lands. The broad pattern of distribution of these soils reflects both the climatic conditions and the geological structure of the region. The soils are highly weathered with limited capacities to supply essential nutrients needed by crop plants. These issues raise a number of questions, most of which focuses on the best possible way to maximize these soils to accommodate both crop farming and cattle rearing. It is our hope that taking the advantage of GIS to stimulate the knowledge and consciousness of soil distribution in the region will place the weight where it is appropriate in terms of food security through crops production and cattle rearing, and hence forge a more realistic pathway to reconciliation and conflict resolution. 展开更多
关键词 HERDSMEN SEDENTARY FARMERS North-central region of Nigeria GIS Digital Soil Map Food Security Conflict Resolution
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Environmental Impact Assessment of Onshore Wind Farms in the Region of Central Greece Using a Modified RIAM Method
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作者 Olga Korozi Dimitra G.Vagiona 《Journal of Environmental & Earth Sciences》 CAS 2024年第1期71-82,共12页
Wind energy is one of the most basic forms of renewable energy,which shows an increasing rate of development worldwide and also at the European level.However,this rapid deployment of wind farms makes the need for an i... Wind energy is one of the most basic forms of renewable energy,which shows an increasing rate of development worldwide and also at the European level.However,this rapid deployment of wind farms makes the need for an impact assessment of this type of projects on the natural and man-made environment imperative.The present paper aims to identify and assess the environmental impacts of wind farm projects in the Region of Central Greece.A modified Rapid Impact Assessment Matrix(RIAM)method is used for this purpose.The methodology includes the identification of the existing onshore wind farm projects in the study area,the appropriate modifications of the RIAM method to respond to the characteristics of the projects and the study area,the qualitative assessment of their potential impacts during construction and operational phases and the computation of the Environmental Performance Grade(EPG)of projects based on the pro-posed modified RIAM method.The results reveal that although there are some slight negative impacts on the natural environment of the study area,the examined wind farms contribute positively both to the atmosphere and to the socio-economic environment of the study.This study extends the potential for using RIAM as a tool in environmental impact assessment studies of renewable energy projects. 展开更多
关键词 Environmental impact assessment Environmental components region of central Greece Rapid impact assessment matrix(RIAM) Environmental performance grade(EPG)
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Central region design for a 10 MeV internal ion source cyclotron 被引量:1
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作者 秦斌 刘开锋 +1 位作者 冯义章 樊明武 《Chinese Physics C》 SCIE CAS CSCD 2009年第8期682-686,共5页
Internal ion sources are widely adopted in commercial cyclotrons used for short-life isotopes production. Without beam manipulation provided by the external beam injection line, the central region of this type of cycl... Internal ion sources are widely adopted in commercial cyclotrons used for short-life isotopes production. Without beam manipulation provided by the external beam injection line, the central region of this type of cyclotron is more sensitive and should be carefully designed. A design study and beam dynamics simulation for the central region of a 10 MeV compact cyclotron is presented. The OPERA3D/TOSCA code was used to calculate the electric field from a parameterized three dimensional (3D) central region model. With iterative structure optimizations of the central region, the beam centering and vertical focusing is well controlled, and the RF phase acceptance is around 25°. A c++ code for beam simulation in the central region was developed and tested. 展开更多
关键词 CYCLOTRON central region beam centering axial beam loss
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Vertical focusing study in the central region of the CYCIAE-100 cyclotron 被引量:1
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作者 姚红娟 张天爵 +1 位作者 管锋平 钟俊晴 《Chinese Physics C》 SCIE CAS CSCD 2009年第S2期39-41,共3页
The vertical focusing is one of the primary problems in the central region of cyclotrons. This focusing effect brought about by the magnetic field is inclined to be weak near the center of the machine due to the fact ... The vertical focusing is one of the primary problems in the central region of cyclotrons. This focusing effect brought about by the magnetic field is inclined to be weak near the center of the machine due to the fact that the flutter is small, while the electric focusing forces incurred from the dee gaps become very strong. Since the electric focusing effect is dependent on the RF phase, we have proceeded to carry out analytical calculations and numerical simulation about the vertical focusing in the central region of CYCIAE100, including magnetic focusing, electric focusing and the defocusing effect from the space charge effect. All the results have been used for the design of the central region for CYCIAE-100 and a good vertical focusing has been obtained. 展开更多
关键词 vertical focusing central region CYCLOTRON
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Legal-Ease:China’s Central Regions—Developing Foreign Investment Inland
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作者 CHRIS DEVONSHIRE-ELLIS 《Beijing Review》 2007年第19期40-40,共1页
Foreign investors need to be keeping an eye on developments in west China and the recently launched Investor Going West Campaign.As the coastal regions get more expensive,pure economics encourages savvy international ... Foreign investors need to be keeping an eye on developments in west China and the recently launched Investor Going West Campaign.As the coastal regions get more expensive,pure economics encourages savvy international investors to look inland 展开更多
关键词 Developing Foreign Investment Inland Legal-Ease:China s central regions
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Legal-Ease China’s Central Regions:Developing Foreign Investment Inland
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作者 CHRIS DEVONSHIRE-ELLIS 《Beijing Review》 2007年第23期38-38,共1页
The operational cost of positioning an export company to inland China may effectively double the overheads. The fact that it is more expensive in terms of additional transport costs is
关键词 Legal-Ease China s central regions:Developing Foreign Investment Inland
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Legal-Ease China's Central Regions:Developing Foreign Investment Inland
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作者 CHRIS DEVONSHIRE-ELLIS 《Beijing Review》 2007年第21期38-38,共1页
This is the second in a series of articles on this topic, the first of which appears in Issue No. 19 We now look at the cost of land. Here we have contacted the most popular local development zone in each city and tak... This is the second in a series of articles on this topic, the first of which appears in Issue No. 19 We now look at the cost of land. Here we have contacted the most popular local development zone in each city and taken their quotes for renting 展开更多
关键词 Legal-Ease China’s central regions:Developing Foreign Investment Inland
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New Political Dynamism in Central Asia:Security Issues and Prospects for Regional Cooperation 被引量:1
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作者 Rustam Khuramov 《Contemporary International Relations》 2019年第2期97-104,共8页
The article examines the issues of regional security and prospects of cooperation between the countries of Central Asia in the context of a new world order. As factors of sustainable development and security, the auth... The article examines the issues of regional security and prospects of cooperation between the countries of Central Asia in the context of a new world order. As factors of sustainable development and security, the author considers the following issues: preservation of the geopolitical balance in Central Asia; development of a multivariate system of transportation and communication corridors; cardinal increase in the efficiency of counterterrorism and religious extremism; a solution to the Afghan problem; and resolution to the problems of fair water use and ecology in the region. 展开更多
关键词 central ASIA Uzbekistan regionAL security cooperation
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Development Plan for Under- forest Economy of Henan Province Based on Central Plains Economic Region 被引量:3
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作者 Xiaodong ZHAO Yimin ZHAO 《Asian Agricultural Research》 2016年第2期34-38,共5页
Firstly,this paper analyzed current situations,major practice and existing problems of under-forest economy in Henan Province.Then,it made an in-depth discussion of guiding thought,principle and objectives,constructio... Firstly,this paper analyzed current situations,major practice and existing problems of under-forest economy in Henan Province.Then,it made an in-depth discussion of guiding thought,principle and objectives,construction task and safeguarding measures of the underforest economic development plan. Besides,it analyzed benefits of the under-forest economic development plan. By 2017,the area of underforest economic land will reach 1. 60 million hm2,create output value of 155. 2 billion yuan( accounting for more than 20% of forest output value),provide 3. 27 million jobs,and will greatly increase ecological carrying capacity of construction and development of the Central Plains Economic Region( CPER). 展开更多
关键词 WORDS Under-forest ECONOMY PLAN central PLAINS Economic region(CPER) Analysis HENAN Province
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Diagnostic Analysis on a Regional Rainstorm Weather in North-central Henan Province 被引量:1
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作者 SUN Zhong-yi ZHANG Zhen LI Ji-hua 《Meteorological and Environmental Research》 CAS 2011年第6期19-23,共5页
[Objective] The research aimed to analyze a regional rainstorm weather process in north-central Henan Province. [Method] Based on the conventional meteorological observation data and the rainfall data of Henan Meteoro... [Objective] The research aimed to analyze a regional rainstorm weather process in north-central Henan Province. [Method] Based on the conventional meteorological observation data and the rainfall data of Henan Meteorological Station, the diagnostic analysis of atmospheric thermodynamics and dynamics on a rainstorm weather process in north-central Henan Province on July 19, 2010 was carried out. The characteristics of physical quantity field and the evolution of weather situation in north-central Henan Province when the rainstorm happened were studied. [Result] Western Pacific subtropical high strengthened to extend westward. The dynamic uplifting of low vortex at the middle and low layers, the strong water vapor transportation of southwest low-level jet caused the regional rainstorm weather process in north-central Henan Province. The diagnostic results of physical quantity showed that the deep, thick wet layer and the sustained water vapor convergence provided the abundant water vapor for rainstorm generation. The positive vorticity advection center developed and spread from northwest to southeast, which was favorable for the development of vertical movement. The structure maintenance of positive vorticity at the middle and low layers, negative vorticity at the middle and high levels provided the power condition for the regional rainstorm generation. The pumping effect of convergence at the middle and low layers, divergence at the high layer was favorable for the strengthening of vertical ascending motion at the low layer. The uplifting effect of dew point front at the middle and low layers triggered the release of unstable energy. The confrontation of warm and cold air was one of the important reasons for the regional rainstorm. TBB characteristic analysis showed that TBB was from -60 to -50 ℃ in north-central Henan Province in the whole strong precipitation time, and the moving speed was equivalent to that of southwest vortex. The low-value belt of TBB corresponded with the rainstorm occurrence zone in Henan, and the minimum-value center of TBB was basically consistent with the strongest center of precipitation. [Conclusion] The research provided the scientific basis for the short-term forecast of rainstorm. 展开更多
关键词 North-central Henan Province regional rainstorm Weather process Diagnostic analysis China
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Analysis of Externality of Rural Labor Force Flow in Central and Western Regions of China and Benefit Compensation 被引量:1
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作者 Xin LI Haijing HU 《Asian Agricultural Research》 2013年第9期64-67,共4页
According to the theories of institutional economics and development economics,the positive and negative externality of rural labor force flowing from central and western regions and into eastern regions of China were... According to the theories of institutional economics and development economics,the positive and negative externality of rural labor force flowing from central and western regions and into eastern regions of China were analyzed,and then it was proposed that it is necessary to positive externality,rather than take"household register"measures to solve the problem simply. 展开更多
关键词 RURAL LABOR force FLOW EXTERNALITY central and wes
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Spatial Heterogeneity Analysis of PM2.5 Concentration in Central Plains Economic Region
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作者 Kaiguang Zhang Hongling Meng +1 位作者 Mingting Ba Yanmin Sun 《Journal of Geoscience and Environment Protection》 2020年第12期244-254,共11页
The research of the spatial heterogeneity of PM2.5 concentration in an area, is of great significance for understanding its regional spatial distribution structure, exploring the transmission relationship between regi... The research of the spatial heterogeneity of PM2.5 concentration in an area, is of great significance for understanding its regional spatial distribution structure, exploring the transmission relationship between regions, in order to formulate joint prevention and control measures within the entire area. Based on the daily monitoring data of PM2.5 concentration in the Central Plains Economic Region in 2019, this paper utilizes cluster analysis to divide the regional PM2.5 concentration into 5 classes, builds their spatial semi-variogram model, and then utilizes interpolation analysis method to study the regional overall distribution characteristics and transmission law. The results show that the PM2.5 concentration in the Central Plains Economic Region has a medium or higher spatial autocorrelation. The critical value of the overall PM2.5 concentration in the area is 150 μg/m3, as the overall PM2.5 concentration less than the value, the PM2.5 in a region mainly comes from local emissions, as the overall PM2.5 concentration higher than the value, the influence of spatial structure on the distribution of PM2.5 concentration is gradually obvious. PM2.5 has a certain degree of spatial transmission, which mainly includes two routes as Puyang-Xingtai and Puyang-Zhengzhou, and the transmission intensity of the former is greater than the latter. 展开更多
关键词 Cluster Analysis Semi-Variogram Spatial Heterogeneity Spatial Structure central Plains Economic region
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Features of isostatic gravity anomaly and seismic activity in the Central Asian region
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作者 方盛明 冯锐 +3 位作者 田长征 孙桂香 王志理 李长法 《Acta Seismologica Sinica(English Edition)》 CSCD 1997年第6期105-109,共5页
In this paper, the lithospheric isostatic gravity anomaly with its distribution features in the Central Asian region (30°~70°N, 50°~140°E), according to the research of the lithospheric isostati... In this paper, the lithospheric isostatic gravity anomaly with its distribution features in the Central Asian region (30°~70°N, 50°~140°E), according to the research of the lithospheric isostatic principle, is discussed. Moreover, some primary structures and seismic activities in this region are discussed. 展开更多
关键词 isostatic gravity anomaly regional structure seismic activity the central Asian region
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Eurasia Continental Bridge——An Important Link of the Coordinated Development between China's Eastern,Central and Western Regions
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作者 Zhao Ming Li Zhukun 《China's Foreign Trade》 1996年第10期42-42,共1页
The new Eurasia Continental Bridgeruns from East China to Central andWest China, crossing 11 provincesand regions, namely Jiangsu, Shandong,Hubei, Anhui, Shaanxi, Gansu, Shanxi,Sichuan, Qinghai, Xinjiang and Ningxia.T... The new Eurasia Continental Bridgeruns from East China to Central andWest China, crossing 11 provincesand regions, namely Jiangsu, Shandong,Hubei, Anhui, Shaanxi, Gansu, Shanxi,Sichuan, Qinghai, Xinjiang and Ningxia.The total area is 3.6 million sq km and thepopulation is about 300 million, accountingfor a third and a quarter of the whole countryrespectively. The area is very rich in naturalresources, so it is called an "Economic goldbelt" and "Gold corridor". Aerial remote-control survey indicates that along thecontinental bridge from Lianyungang to theAla Mountains within China’s boundary, 展开更多
关键词 area In An Important Link of the Coordinated Development between China’s Eastern central and Western regions Eurasia Continental Bridge
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Preparation of artificial cornea with a central optic region and porous skirt
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《Chinese Journal of Biomedical Engineering(English Edition)》 2002年第1期7-9,共3页
关键词 PHEMA Preparation of artificial cornea with a central optic region and porous skirt
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