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| 1 | A PRIOR ESTIMATE AND EXISTENCE OF POSITIVE SOLUTIONS OF SEMILINEAR ELLIPTIC EQUATION WITH THE THIRD BOUNDARY VALUE PROBLEM显示文摘This paper is to study semilinear elliptic equation Lu = f(u) in Ω, Ω RN being a smooth bounded domain, with the third boundary value conditions =0, where operator, nonlinear function f(u) increase in the form of up, , We get a prior estimate and existence of positive solutions of above equation. | GU Yonggeng (Department of Mathematics, Hunan Normal University, Changsha 410081 Institute of Systems Science, Academy of Mathematics and Systems Science, Chinese Academy of Sciences, Beijing 100080, China) LIU Tong (Institute of Systems Science, Academy | 2001 | Journal of Systems Science & Complexity2001，14，4： | 5 |
| 2 | Photosynthesis and biochemical responses to elevated O_3 in Plantago major and Sonchus oleraceus growing in a lowland habitat of northern China显示文摘A field experiment was carried out to compare the responses to ozone(O_3) in two common herbaceous plant species, Plantago major L. and Sonchus oleraceus L., by building open-top growth chambers in situ to simulate O_3stress(+ O_3, 85 ± 5 ppb, 9 hr/day for 30 days) in a lowland habitat in Inner Mongolia, Northern China. Responses to O_3 of gas exchange,chlorophyll a fluorescence, leaf pigment content, antioxidant capability, soluble protein content, membrane lipid peroxidation and dark respiration(R_d) were analyzed. Results showed that elevated O_3 exposure significantly reduced the light-saturated net photosynthesis(P_(Nsat)), stomatal conductance(g_s) and transpiration rate(E) in both species. Although non-significant interactive effect between species and O_3 on P_(Nsat) was analyzed, the reduction in P_(Nsat) in S. oleraceus might be due primarily to the higher fraction of close PSII reaction centers and impaired activities of plant mesophyll cells as evidences by decreased maximum efficiency of PSII photochemistry after dark adapted state(F_v/F_m) and unchanged intercellular CO_2concentration(C_i). Besides, biochemical analysis showed that S. oleraceus had lower antioxidant ability compared to P. major. As a result, S. oleraceus was damaged to the larger extent in terms of lipid peroxidation and visible O_3 injury, indicating that S. oleraceus was more sensitive to O_3 than P. major. Our results indicated that wild herbaceous plant species growing in a lowland habitat in sandy grassland were sensitive to O_3 stress and S. oleraceus can be considered as one of the bio-indicators for high O_3 concentration in semi-arid grassland of northern China. | Benying Su Meihua Zhou Hong Xu Xiujie Zhang Yonggeng Li Hua Su Bao Xiang | 2017 | Journal of Environmental Sciences2017，29，3： | 4 |
| 3 | Structure Optimization Design of 3-UPU Parallel Mechanism Based on the Comprehensive Dexterity显示文摘 | Wei Yonggeng Fan Yuchao Li Qiang | 2015 | Recent Advances in Electrical&Electronic Engineering2015，8，1： | 1 |
| 4 | Restoring the degraded grassland and improving sustainability of grassland ecosystem through chicken farming: A case study in northern China显示文摘 | Hong Xu Hua Su Benying Su Xingguo Han Dilip K. Biswas Yonggeng Li | 2014 | Agriculture Ecosystems and Environment2014，，： | 1 |
| 5 | Distributed Skyline Retrieval with Low Bandwidth Consumption显示文摘 | Zhu Lin Tao Yufei Zhou Yonggeng | 2009 | IEEE Transactions on Knowledge and Data Engineering2009，21，3： | 1 |
| 6 | QUENCHING PHENOMENA FOR SYSTEMS OF SEMILINEAR PARABOLIC EQUATIONS I显示文摘Initial-boundary value problems for a class of systems of semilinear parabolicequations with singular terms are investigated, conditions for the existence and nonexistence of the global solutions to the above problems are given, and upper bounds of thequenching time and the critical length are obtained. | DAI Qiuyi(Department of Basic Science, Xiangtan Mining Institute, Hunan Xiangtan 411201, China)GU Yonggeng(Institute of Systems Science, Academia Sinica, Beijing 100080, China) | 1997 | Systems Science and Mathematical Sciences1997，10，4： | 1 |
| 7 | Imitated Ecological Cultivation Technology of Dendrobium offcinale: A Case Study of Longshitou Village,Longmen County显示文摘In order to optimize the planting structure of Longshitou Village in Longmen County and promote the efficient cultivation of Dendrobium offcinale industry,the imitate ecological cultivation technology of D.offcinale is studied from the aspects of site selection,seedling domestication,seedling colonization,and disease and pest control after colonization according to the natural environmental conditions of Longshitou Village. | Xiulian Lin Yingjun Zhou Junhong Zhong Jinhe Zhu Xiaoru Chen Yonggeng Lin Minchun Huang Lihua Yang Zhi Zhang | 2021 | Plant Diseases and Pests2021，12，2： | 1 |
| 8 | Traits of chlorophyll fluorescence in 99 plant species from the sparse-elm grassland in Hunshandak Sandland显示文摘 | Li Yonggeng Li Linghao Jiang Gaoming Niu Shuli Liu Meizhen Gao Leiming Peng Yu Jiang Chuangdao | 2004 | Photosynthetica2004，42，： | 1 |
| 9 | EXISTENCE OF NONTRIVIAL SOLUTIONS FOR CRITICAL SEMILINEAR BIHARMONIC EQUATIONS显示文摘EXISTENCEOFNONTRIVIALSOLUTIONSFORCRITICALSEMILINEARBIHARMONICEQUATIONS￥GUYonggeng(InstituteofSystemsScience,AcademiaSinica,Be... | GU Yonggeng(Institute of Systems Science, Academia Sinica, Beijing 100080, China)DENG Yinbin(Department of Mathematics, Huazhong Normal University ,Wuhan 430070, China)WANG Xujia(Department of Mathematics, Zhejiang University, Hangzhou 310027, China) | 1994 | Systems Science and Mathematical Sciences1994，7，2： | 1 |
| 10 | FRACTIONAL ORDER EVOLUTION EQUATIONINTERPOLATING BOTH HEAT AND WAVE EQUATION显示文摘In this paper we consider a class of fractional order evolution equations which interpolates the heat equation and wave equation. By Mittag-Lefflers functions[1] and functions transform the representative formula of solution for fractional evolution equation is obtained. Further we give a theoretical description for fractional evolution equation from the integrated semigroup point of view. | BAI Fengtu (North China Institute of Water Conservancy and Hydroelectric Power, Zhengzhou 450045, China) GU Yonggeng (Institute of Systems Science, Academia Sinica, Beijing 100080, China) MIAO Changxing (Institute of Applied Physics and Computational Math | 1997 | Systems Science and Mathematical Sciences1997，10，2： | 0 |
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