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54篇 您的检索式:作者名="GAO JunGang"
    题名 作者 年代 出处 被引量
1Spatial and temporal variability in the net primary production of alpine grassland on the Tibetan Plateau since 1982显示文摘基于 GIMMS AVHRR NDVI 数据( 8 km 空间分辨率)为 19822000 , SPOT 植被 NDVI 数据( 1 km 空间分辨率)为 19982009 ,并且观察植物生物资源数据, CASA 模型习惯于在高山的草地的变化在西藏的高原( TP )上让主要生产( NPP )赚的模型。这研究将帮助评估高山的草地生态系统的健康条件,并且对高原牧场并且到 TP 上的国家生态的安全躲蔽处的函数的理解的持续开发的提升很重要。NPP 变化的时间空间的特征用空间统计分析被调查,独立根据 physico 地理的因素(自然地区,高度,纬度和经度) ,河盆,和县级的行政区域。处理的数据用一个 ENVI 4.8 平台被执行,当一个 ArcGIS 9.3 和 ANUSPLIN 平台被用来进行空间分析并且印射时。主要结果如下:(1 ) TP 上的高山的草地的 NPP 逐渐地从东南减少到西北,它在降水和温度对应于坡度。从 1982 ~ 2009,在 TP 高山的草地的平均年度全部的 NPP 是 177.2 ??  ??  ?ZHANG Yili QI Wei ZHOU Caiping DING Mingjun LIU Linshan GAO Jungang BAI Wanqi WANG Zhaofeng ZHENG Du 2014Journal of Geographical Sciences2014,24,2:47
2Start of vegetation growing season on the Tibetan Plateau inferred from multiple methods based on GIMMS and SPOT NDVI data显示文摘在这研究,我们使用了四个方法从 1982~2012 在西藏的高原( TP )上调查成长季节( SGS )的开始,用从全球库存为研究建模并且印射获得的规范的差别植被索引( NDVI )数据( GIMSS , 19822006 )并且点植被( SPOT-VGT , 19992012 )。用四个方法估计的 SGS 价值沿着纬度或高度的坡度显示出类似的空间模式,但是与在 SGS 日期的重要变化。最大的差异主要在这些区域被发现与最高或最低植被范围。在 1982 和 1998 之间,然而,从四个方法导出的 SGS 值都根据更最近的点 VGT 数据(19992012 ) 显示一个进展趋势,没有 TP 上的 SGS 的连续地进展的趋势。在价值从在 1999 和 2006 之间的 GIMMS 和点导出的 SGS 之间的关联的分析数据来源与问候在趋势表明一致性到并且到使用的四个分析方法。与另外的方法相比,最大的一致性在之间在里面 situ 数据和检索的 SGS 值与方法 3 被获得(NDVI 比率的阀值) 。避免错误在有多样的植被类型和物理环境的一个广阔区域,知道不同植被类型的季节的变化特征是批评的,特别地在有稀少的草地的区域或常绿树森林。DING Mingjun LI Lanhui ZHANG Yili SUN Xiaomin LIU Linshan GAO Jungang WANG Zhaofeng LI Yingnian 2015Journal of Geographical Sciences2015,25,2:17
3The Influence of Extractable Organic Matter on Pore Development in the Late Triassic Chang 7 Lacustrine Shales, Yanchang Formation, Ordos Basin, China显示文摘To investigate the influence of extractable organic matter(EOM) on pore evolution of lacustrine shales, Soxhlet extraction, using dichloromethane, was performed on a series of Chang 7 shale samples(Ordos Basin, China) with vitrinite reflectance of 0.64% to 1.34%. Low-pressure gas adsorption experiments were conducted on the samples before and after extraction. The pore structure parameters were calculated from the gas adsorption data. The results show complex changes to the pore volumes and surface areas after extraction. The pore development of both the initial and extracted samples is strongly controlled by total organic carbon(TOC) content. Micropores developed mainly in organic matter(OM), while mesopores and macropores predominantly developed in fractions other than OM. The influence of EOM on micropores is stronger than on mesopores and macropores. Organic solvents with a higher boiling point should be used to explore the effect of EOM on pore structure in the future.HAN Hui LIU Pengwei DING Zhengang SHI Pitong JIA Jianchao ZHANG Wei LIU Yan CHEN Shijia LU Jungang Chen Kang PENG Xudong WANG Zhiyong XIAO Shuqi GAO Yuans 2018Acta Geologica Sinica(English Edition)2018,92,4:8
4Ultrathin two-dimensional metal–organic framework nanosheets for efficient electrochemical CO_(2) reduction显示文摘Electrochemical CO_(2) reduction into CO or high-value products is regarded as a feasible pathway for energy conversion,which has attracted universal attention in recent years [1-3].However,the reduction of CO_(2) molecule is a thermodynamically uphill process,which involves multiple elemental steps and the competition of hydrogen evolution reaction(HER) in aqueous solution.Lu Ye Xuyang Chen Yan Gao Xin Ding Jungang Hou Shuyan Cao 2021Journal of Energy Chemistry2021,30,6:2
5Three-dimensional (3D) structure model and its parameters for poplar shelterbelts显示文摘The spatial functions of surface area density(vegetative surface area per unit canopy volume) and cubic density(vegetative volume per unit canopy volume) have been used as two three-dimensional(3D) structural descriptors for shelterbelt.The functions were defined by models as a general case.However,sub-models such as surface area,volume,and corresponding distributions were not explicitly defined for poplar trees,which are a dominant woody species in shelterbelts all over China,and this limits applications of the models in China and elsewhere.In order to define and develop these sub-models for shelterbelts,poplar trees were destructively sampled from multiple-row shelterbelts and then were measured for their surface area and volume.Using these measurements,we estimated parameters to define their equations explicitly.Based on the architecture and planting patterns of trees in shelterbelts,the distribution of the surface areas and volumes vertically and across the width for different tree heights were constructed for the three components of trunks,branches and leaves.Incorporating the defined equations into the models,we described the 3D structure of a multiple-row poplar shelterbelt.The results showed that,the spatial change in magnitude of surface area density(0.215-10.131 m2/m3) or cubic density(0.00007-0.04667 m3/m3) in shelterbelts is large and their distributions are not uniform.The assumption for boundary-layer flow modeling efforts that the 3D distribution of shelterbelt structure was uniform is not the case in field.The 3D structure model not only can be used to model the flow field as influenced by each tree component,but also can express the entire aerodynamic characteristics of a shelterbelt.The methodologies and equations that are developed in this study can be applied to estimate the 3D structure of a shelterbelt with a design similar to our studied poplar shelterbelts in terms of species composition and planting patterns.The fitted models can be used to describe the 3D aerodynamic structure of field shelterbelts.Furthermore,an improved description of shelterbelt structure has great potential to improve the simulation of boundary layer flows as influenced by that shelterbelt.Such insights can eventually be used to quantify the design of shelterbelt structure and/or adjustment for managing the function of shelterbelts and their effects on microclimate.FAN ZhiPing GAO JunGang ZENG DeHui ZHOU XinHua SUN XueKai 2010Science China Earth Sciences2010,53,10:2
6Synthesis and characterization of graft-type MCS resin 显示文摘GAO Jungang YU Caixia AN Quanfu 2001Int J Polym Mater2001,48,4:1
7Synthesis rheologieal behavior and mechanical properties of graft-type acs resin 显示文摘GAO Jungang 2002Polym Plast Tecbnol Eng2002,1,5:1
8Effects of dietary methionine supplementation on growth performance of cubs,nutrient digestibility, nitrogen metabolism and serum biochemical indicators of female blue foxes(Alopex lagopus)显示文摘The objective of the present study was to investigate the effects of methionine(Met) supplementation on growth performance of cubs, nutrient digestibility, nitrogen metabolism and serum biochemical parameters of female blue foxes. One hundred primiparous female blue foxes that were similar in breeding date, pedigree, age, and weight were selected for the trial. The foxes were randomly assigned to four groups(n = 25 each group) and fed diets supplemented with Met at 2(Met2), 4(Met4), 6(Met6)and 8 g/kg(Met8), respectively, for 40 days. Our data showed that body weights at 20 and 40 d were significantly higher in the Met4 group than in the Met2 group(P < 0.05). The Met4 group also had the highest apparent digestibility of dry matter and crude protein compared with either the Met2, Met6, or Met8 group(P< 0.05). The serum Met and isoleucine(Ile) concentrations were significantly higher in the Met4 group than in the Met6 or Met8 group(P < 0.05). In summary, these data indicate that supplementary Met improves growth performance of cubs likely due to increased crude protein and dry matter and increased nitrogen retention of female blue foxes. The optimal amount of Met supplementation is10 g/kg basal diet.Jungang Guo Xuezhuang Wu Tietao Zhang Zhi Liu Hu Cui Fuhe Yang Xiuhua Gao 2015Animal Nutrition2015,,4:1
9Synthesis of PBA/PMSAN core-shell graft copolymer and its application as a processing aid for PVC显示文摘Gao Jungang Li Zhiting Yao Zihua 1995Polymer1995,36,6:1
10Melting,nonisothermal crystallizationbehavior and morphology of polypropylene/random ethylenepropylenecopolymer blends显示文摘Wang Dong Gao Jungang 2006Journal of Applied PolymerScience2006,99,67:1
11Curing and morphology of BPA epoxy resin/LC epoxy resin PEPEB composites显示文摘Gao Jungang Hou Guixiang Wang Yong 2007Polymer-Plastics Technology and Engineering2007,46,5:1
12Kinetics of curing and thermal degradation of POSS epoxy resin/DDS system 显示文摘Gao Jungang Jiang Caojie Zhang Xuejian 2007Inter J Polym Mater2007,56,:1
13Synthesis rheological behavior and mechanical properties of graft-type ACS resin显示文摘Gao Jungang 2002Polym-Plast Technol Eng2002,,5:1
14Synthesis rheological behavior and mechanical properties of graft-type ACS resin 显示文摘Gao Jungang Sun Shuhui Li Deling 2002Polym-Plast Technol Eng2002,1,5:1
15Thermal stability of boron-containing phenol formalde-hyde resin显示文摘Jungang Gao Yanfang Liu Liting Yang 1999Polymer Degradation and Stability1999,63,1:1
16Preparation of ehitosan mierospheres loading of 3,5-dihydroxy-4-i-propylstilbene and in vitro release显示文摘GAO Jungang ZHANG Yue YU Yifeng 2011J Polym Res2011,18,6:1
17Synthesis of lc p-biphenyl di{4-E2-benzoate} and curing kinetics with succinic anhydride 显示文摘Chen Jing Gao Jungang Liu Yun 2008International Journal of Polymeric Materials2008,57,2:1
18Organic-inorganic hybrid boron-containing phenol-formaldehyde resin/SiO2 nanocomposites显示文摘Gao Jungang Jiang Chaojie Ma Weitao 2008Polym Comp2008,29,3:1
19Preparation and atomic oxygen erosion resistance of silica film formed on silicon rubber by sol-gel method显示文摘Xing An Gao Yuan Yin Jungang el al 2010Applied Surface Science2010,256,:1
20Synthesis rheological behavior and mechanical properties of graft-type ACS resin 显示文摘Gao Jungang 2002Polym-Plast Technol Eng2002,,5:1
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