oalib

Publish in OALib Journal

ISSN: 2333-9721

APC: Only $99

Submit

Any time

2019 ( 27 )

2018 ( 203 )

2017 ( 219 )

2016 ( 196 )

Custom range...

Search Results: 1 - 10 of 16972 matches for " GU Kang-kang "
All listed articles are free for downloading (OA Articles)
Page 1 /16972
Display every page Item
Dynamic Analysis and Forecast of Ecological Footprints in Jilin Province
吉林省生态足迹动态分析与预测

GU Kang-Kang,LIU Jing-Shuang,
顾康康
,刘景双

中国科学院研究生院学报 , 2007,
Abstract: Ecological footprints model is a method of measuring the sustainable development. The model was applied to evaluate the present situation of sustainable development of Jilin province and its developing trend in future, which can provide suggestions for the sustainable development of Jilin province. We reviewed the past and present study of the model and the way of its calculation. Ecological footprints (EF) and ecological capacity (EC) in Jilin province from 1978 to 2002 were studied by the ecological footprints model and ecological footprints and ecological capacity of Jilin province from 2004 to 2016 was predicted by the regression model. Results showed: from 1978 to 2002, in Jilin province, the per capital EF increased from 1.090hm2 to 2.457hm2, and the increase speed per year was 3.45%; the per capital EC decreased from 1.210hm2 to 1.096hm2, and the decrease speed per year was 0.4%. There was ecological surplus in 1978 and 1980, while in the other years there ecological deficit. From 2004 to 2016, the increase speed per year of per capital EF will reach 1.99%, and the decrease speed per year of per capital EC will reach 0.5%. The extant problems of ecological footprints model and further study were also discussed.
Analysis of environmental air quality trends and driving factors of mining cities in central Liaoning
辽中地区矿业城市环境空气质量变化及其影响因素分析

GU Kang-Kang,LIU Jing-Shuang,WANG Yang,
顾康康
,刘景双,陈昕

中国科学院研究生院学报 , 2009,
Abstract: 辽中地区矿业城市是中国重要的能源生产和重工业基地,研究其环境空气质量变化及其影响因素有利于改善空气质量恶化的现状,促进经济、生态协调发展.利用鞍山、抚顺和本溪的环境空气质量定点监测数据,采用:Daniel的趋势检验方法分析了鞍山、抚顺和本溪2001~2006年市区环境空气质量的变化趋势,并探讨了主要影响因素.结果表明,2001~2006年,辽中地区矿业城市市区空气污染较为严重,月降尘、PM10全部年份超标严重,SO2部分年份超标,属于典型的煤烟型污染.鞍山市区各类污染物变化不显著,除SO2略呈上升趋势,其余污染物均呈下降趋势;抚顺市区除PM10呈显著下降趋势(p<0.1),其余污染物均呈上升趋势,其中NO2呈显著上升趋势(p<0.1);本溪市市区各类污染物均呈下降趋势.空气污染季节和空间差异显著,冬春季污染程度明显高于夏秋季,工业区、交通区显著高于居民区、清洁区.经济增长带来的能源需求压力、环境保护措施的实施,以及各个市区独特的地理位置和气象条件的相互作用,是辽中地区矿业城市市区空气环境质量变化的主要影响因子.因此,需要改善以煤炭为主的能源消费结构、加强机动车尾气排放管理、合理规划城市布局、从区域整体上提高大气环境容量,从而改善辽中地区矿业城市环境空气质量.
Modified study of ecological footprint model——A case of mining cities in central Liaoning
生态足迹模型修正研究 ——以辽中地区矿业城市为例

GU Kang-Kang,LIU Jing-Shuang,WANG Yang,
顾康康
,刘景双,王洋

中国科学院研究生院学报 , 2009,
Abstract: In order to improve the veracity of the ecological footprint model, the emergy analysis and social-economy system development index were introduced into the model, and the mining cities in central Liaoning were taken as cases. Results showed that, based on the modified model of ecological footprint, the EF was 6.95hm2, the EC was 1.72hm2, and the per capita ecological deficit was 5.23hm2 in 2005, so the overloading degree of EF of mining cities in central Liaoning was serious. The proportion of energy ecological footprint was the highest (55%). The test results indicated that, the analysis of the modified model could be more exact.
Land use change in mining cities of Central Liaoning
辽中地区矿业城市土地利用变化

GU Kang-kang,LIU Jing-shuang,DOU Jing-xin,
顾康康
,刘景双,窦晶鑫

生态学杂志 , 2007,
Abstract: 辽中地区矿业城市是我国重要的能源生产和重工业基地,研究其土地利用变化有利于改善环境质量,提高土地利用效率。分析了1985—2000年鞍山、抚顺、本溪土地利用变化指数、土地利用变化程度综合指数、土地利用结构信息熵、土地利用景观指数及其驱动力。结果表明:辽中地区矿业城市土地利用变化整体上呈现耕地、建设用地增加,林地、草地减少的趋势;不同矿业城市变化率最大的土地类型均不相同,鞍山为建设用地,增加5.45%;抚顺为水域,增加3.19%;本溪为草地,减少7.29%。土地利用程度变化综合指数均为正值,且鞍山>本溪>抚顺;土地利用结构信息熵均呈增长趋势,2000年鞍山为0.603,抚顺为0.406,本溪为0.407;景观破碎化程度加大,破碎度为鞍山>本溪>抚顺,景观多样性指数较高,景观结构复杂,景观多样性和均匀性均为鞍山>抚顺>本溪;自然条件的差异是土地利用变化差异的基础,人类社会经济活动和政策法规是土地利用变化的主要驱动力。
The Research about Ecological Carrying Capacity of Mining Cities in Central Liaoning
辽中地区矿业城市生态承载力研究

GU Kang-kang,LIU Jing-shuang,DOU Jing-xin,
顾康康
,刘景双,窦晶鑫

自然资源学报 , 2008,
Abstract: Ecological footprints model is a method of measuring the sustainable development.In recent years,ecological footprints model has been a widely accepted tool to quantify the sustainable development level in many fields.However,ecological footprints model neglected the sustainability of economy and science technology.In order to improve the veracity of the model we join the economic factors,and they would provide suggestions for the sustainable development of mining cities in central Liaoning.We calculated ecological footprints(EF),ecological carrying capacity(EC) and budget of mining cities in central Liaoning between 1985 to 2005 by ecological footprints model;after coupling ecological footprint,ecological carrying capacity and economic factors by P-SR model,we got synthetic ecological carrying capacity index and estimated synthe-tic ecological carrying capacity level of mining cities in central Liaoning between 1985 to 2005.Results showed that: in mining cities in central Liaoning between 1985 to 2005,the EF increased from 1.79 ha to 3.53 ha,the increasing rate was 97.43%;the EC increased from 0.78 hm2 to 0.81 ha;the budget increased from-1.01 ha to-2.73 ha,the increasing rate was 190.17%;the synthetic ecological carrying capacity index reduced first,then increased from 2000;the synthetic ecological carrying capacity level was very high in 1985,lower in 1990,common in 1995 and 2000,and high in 2003 and 2005.The changing trend between ecological carrying capacity and synthetic ecological carrying capacity index was alike.The test result indicated that synthetic ecological carrying capacity index was developed from ecological carrying capacity,the relativity between them was high;and the synthetic ecological carrying capacity index was coupled by ecological carrying capacity,ecological footprints and economic factors,the richness of indicators could also improve the veracity of the estimated results.So the explorative research of ecological footprints model and economic factors was carried out which could give some use for reference of the other research about ecological footprints model.
Comparative Advantage of Water Utilization in Liaoning Province
辽宁省水资源利用的比较优势分析

ZHAO Wei,LIU Jing-shuang,GU Kang-kang,WANG Ming-quan,
赵卫
,刘景双,顾康康,王明全

资源科学 , 2008,
Abstract: In order to calculate and analyze the comparative advantage of water utilization in Liaoning province, we developed methods based on comparative advantage theory. We designed a scale advantage index to measure the comparative advantage of water consumption, determined the benefit advantage index based on the efficiency of water utilization, and then estimated the comparative advantage index of water utilization using the scale advantage index and the benefit advantage index. Cluster analysis was applied to assess regional differences in comparative advantage of water utilization in Liaoning province and the influencing factors. Results showed that the comparative advantage of productive water varied by sector. From 1997 to 2005, the comparative advantage index of irrigation water in Liaoning was always less than 1, and the comparative advantage index of forestry/livestock/fisheries water and industrial-use water was more than 1. Compared with the national average, irrigation water in the province had a comparative disadvantage from 1997 to 2005, while forestry/livestock/fisheries water and industrial-use water maintained a comparative advantage throughout. The comparative advantage of productive water in Liaoning province had marked regional differentiation due to differences in natural conditions, precipitation levels, and socio-economic factors. We divided the cities of Liaoning province into three categories: comparative advantage of industrial-use water, comparative disadvantage of industrial-use water, and comparative disadvantage of irrigation water. There were also urban-rural differences in the comparative advantage of residential water. From 1997 to 2005, the comparative advantage index of urban residential water in Liaoning province was always more than 1, but the comparative advantage index of rural residential water was less than 1. Compared with the national average, urban residential water in the province had a comparative advantage but this gradually weakened, while rural residential water had a comparative disadvantage but improved over the study period. The comparative advantage of residential water in Liaoning province had marked regional variation, which was significantly correlated with urbanization ratio. Based on the comparative advantage of residential water, the cities of Liaoning province were divided into two categories: comparative advantage of urban residential water and comparative advantage of rural residential water. Finally, some suggestions for water utilization in Liaoning province were proposed, based on the comparative advantage of water utilization in the province and its cities.
Dynamic coupling of ecological supporting capability and socioeconomic development of west Jilin Province.
吉林省西部生态支撑能力与社会经济发展的动态耦合

WANG Ming-quan,WANG Jin-da,LIU Jing-shuang,GU Kang-kang,
王明全
,王金达,刘景双,顾康康

应用生态学报 , 2009,
Abstract: 利用协调发展模型和剪刀差方法,对1986—2004年间吉林省西部生态支撑能力[F(x)]和社会经济[F(y)]的耦合关系进行了分析.结果表明:研究期间,吉林省西部F(x)呈先下降后略有上升的趋势,而F(y)总体呈指数形式增长;受自然和人为因素影响,F(x)和F(y)具有明显的脆弱性;F(x)和F(y)的剪刀差α从1986年的4.93°下降到1996年的0.28°,后又上升至2004年的12.30°;1995—2004年间,吉林省西部由以损害F(x)促进F(y)发展的状态正逐渐向两者协调发展状态过渡,F(x)和F(y)的耦合协调度由轻度或濒临失调衰退类型转变为勉强或初级协调类型,但这种刚发展起来的初级协调状态仍存在较大的不稳定性;1995年后,α增长较快且协调度C波动强烈F(x)和F(y)冲突较强烈,研究区处于生态环境问题的多发期;相比单一的协调发展模型,与剪刀差方法结合可从发展状态和演变速率2个角度来表征F(x)和F(y)的相互作用,它既能反映两者发展的均衡程度又能反映两者的冲突强度,可更加全面和深入地探讨生态支撑能力和社会经济发展的耦合关系.
μ-Oxalato-bis[bis(2,2′-bipyridine)manganese(II)] bis(perchlorate) 2,2′-bipyridine solvate
Kang-kang Li,Chun Zhang,Wei Xu
Acta Crystallographica Section E , 2011, DOI: 10.1107/s1600536811038475
Abstract: The unit cell of the title compound, [Mn2(C2O4)(C10H8N2)4](ClO4)2·C10H8N2, consists of a binuclear cation, two perchlorate anions, and one solvent 2,2′-bipyridine (bpy) molecule. In the complex cation [Mn2(C2O4)(C10N2H8)4]2+, two MnII atoms are bridged by a bis(bidentate) oxalate ligand, each MnII atom being further coordinated by two bpy ligands in a distorted octahedral geometry. The distance between the two six-coordinated metal atoms is 5.583 (1) . π–π stacking interactions [interplanar distances between bpy rings = 3.739 (1) ] are essential to the supramolecular assembly. There are extensive interionic C—H...O interactions between the cations and between the cation and anion. Three of the four perchlorate O atoms are disordered over two sets of sites with occupancy ratios of 0.852 (6):0.148 (6).
Identification of two internal signal peptide sequences: critical for classical swine fever virus non-structural protein 2 to trans-localize to the endoplasmic reticulum
Kang-kang Guo, Qing-hai Tang, Yan-ming Zhang, Kai Kang, Lei He
Virology Journal , 2011, DOI: 10.1186/1743-422x-8-236
Abstract: Our results showed that the -NH2 terminal of the CSFV NS2 protein was highly hydrophobic and the protein localized in the ER. At least four transmembrane regions and two internal signal peptide sequences (amino acids103-138 and 220-262) were identified and thought to be critical for its trans-localization to the ER.This is the first study to identify the internal signal peptide sequences of the CSFV NS2 protein and its subcellular localization, providing the foundation for further exploration of this protein's function of this protein and its role in CSFV pathogenesis.Classical swine fever (CSF) is a highly contagious and often fatal disease of pigs and is classified by the World Organization for Animal Health (OIE) as a notifiable (previously List A) disease. The causative agent of CSF is classical swine fever virus (CSFV), a member of the Pestivirus genus within the Flaviviridae family of viruses, which also contains the genera Flavivirus and Hepacivirus (hepatitis C viruses, HCV)[1]. CSFV harbors a 12.3 kb positive-sense, single-stranded RNA genome that consists of a large open reading frame that encodes a polyprotein which is processed into 12 mature proteins, namely, Npro, C, Erns, E1, E2, p7, NS2, NS3, NS4A, NS4B, NS5A and NS5B [2-4].In recent years, the nonstructural NS2 protein has been thought to be functional only as an NS2/NS3 auto-protease, which is essential for high productivity of CSFV in vivo. It was speculated that the N-terminal half of NS2 is highly hydrophobic, and that p7 protein may contain a signal sequence to direct the downstream NS2 protein to the membrane [3,5,6]. Our previous study demonstrated that CSFV NS2 was a hydrophobic protein and localized in the endoplasmic reticulum (ER) membrane, independently of CSFV p7 peptides. However, the membrane topology and molecular mechanism of ER localization of this protein remains unclear. The biofunction of a protein is always associated with it's subcellular localization. For instance, HCV NS2 pr
Focal Shift of Paraxial Gaussian Beams in a Left-Handed Material Slab Lens

ZHANG Kang-Kang,LUO Hai-Lu,WEN Shuang-Chun,

中国物理快报 , 2010,
Abstract: Focal shift is inevitable in conventional lens systems due to the Fresnel number and angular aperture. In this Letter, we demonstrate that there is no focal shift when a paraxial Gaussian beam passes through a left-handed material slab lens without absorption or gain. However, the effect is exhibited in the presence of absorption or gain, and becomes larger as the absorption or gain increases. When the absorption is equal to the gain, the phenomenon of the focal shift caused by the gain is more obvious. In addition, the field distribution is not affected by the absorption or gain and always remains Gaussian both in internal and external focus planes.
Page 1 /16972
Display every page Item


Home
Copyright © 2008-2017 Open Access Library. All rights reserved.