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| 1 | Polymorphism of human telomeric quadruplex structures显示文摘 | Jixun Dai Megan Carver Danzhou Yang | | 0，，8： | 1 |
| 2 | Machine Learning-Based Evaluation of Susceptibility to Geological Hazards in the Hengduan Mountains Region, China显示文摘The Hengduan Mountains Region(HMR) is one of the areas that experience the most frequent geological hazards in China. However, few reports are available that address the geological hazard susceptibility of the region.This study developed six machine learning models to assess the geological hazard susceptibility. The results show that areas with medium and high susceptibility to geological hazards as a whole account for almost 21% of the total area, while both are 18% when it comes to the single hazard of landslide and rockfall respectively. Medium and high geological hazard susceptibility is found in three parts of the HMR with different characteristics:(1)the central and southern parts, where the population of the region concentrates;(2) the northern part, where higher geological hazard susceptibility is found along the mountain ranges;and(3) the junction of Tibet, Yunnan, and Sichuan in the eastern part, which is prone to larger-scale geological hazards. Of all the potential influencing factors,topographic features and climatic variables act as the major driving factors behind geological hazards and elevation,slope, and precipitation are crucial indicators for geological hazard susceptibility assessment. This study developed the geological hazard susceptibility maps of the HMR and provided information for the multi-hazard risk assessment and management of the region. | Jiaqi Zhao Qiang Zhang Danzhou Wang Wenhuan Wu Ruyue Yuan | 2022 | International Journal of Disaster Risk Science2022，13，2： | 1 |
| 3 | Morphological and Chemical Variation of Prunella vulgaris Populations from Different Locations in China显示文摘Objective To investigate the variation of chemical characteristics with environmental factors and establish a relationship between morphological characters and chemical composition of Prunella vulgaris collected in different areas of China. Methods Twelve phenotypic traits and three chemical compositions were assessed in 28 populations of P. vulgaris collected from different locations in China. Results The variability ranges observed at phenotypic and chemical levels were polymorphic. According to the morphological traits, 28 populations of P. vulgaris could be grouped into six clusters, and two morpho-types could be clearly distinguished. Perceptible differences could be discerned in the plant height, leaf length, corolla length, calyx length, fruiting spikes length, and maturity period. Based on three kinds of components including ursolic acid, total flavonoids, and total polysaccharides, all populations could be identified as four types. Cluster IV showing high content of ursolic acid, total flavonoids, and total polysaccharides could be utilized to develop superior derivatives. Conclusion The variation of chemical characteristics is influenced by the genetic and environmental factors, such as soil, climate, longitude, and altitude. It provides a solid basis for efficiently evaluating qualities and establishing good agricultural practices for P. vulgaris. | LIAO Li1, 2, LIU Li1, GUO Qiao-sheng1, WANG Zhi-yong2, CHEN Yu-hang1 1. Institute of Chinese Medicinal Materials, Nanjing Agricultural University, Nanjing 210059, China 2. Agronomy College, Hainan University, Danzhou 571737, China | 2010 | Chinese Herbal Medicines2010，2，4： | 0 |
| 4 | EXISTENCE OF NON-OSCILLATORY SOLUTIONS OF A CLASS OF HIGHER-ORDER NONLINEAR NEUTRAL DIFFERENCE EQUATIONS WITH A FORCED TERM显示文摘In this paper, we consider a certain forced higher-order nonlinear neutral difference equation. By using Krasnoselskii's fixed point theorem and some new techniques, we obtain necessary and sufficient conditions for the existence of non-oscillatory solutions for the system. Our results extend the results of Zhang [5]. | Jia Ming Shen Jianhua ( Dept. of Math., Hunan Normal University, Changsha 410081 Dept. of Base, South China University of Tropical Agriculture, Danzhou 571737) | 2006 | Annals of Differential Equations2006，22，3： | 0 |
| 5 | Research on Risks and Forecasting Countermeasures of Hainan Banana Industry显示文摘Based on the overviews of the current conditions of Hainan banana industry,the research makes an analysis of the risks faced by Hainan banana industry.They are respectively marketing risks,natural risks,information risks and production risks.In order to promote a sustainable and rapid development of Hainan banana industry,countermeasures are proposed in the research.The first is to strengthen the leading organization of forecasting mechanisms on banana industry.The second is to establish the forecasting mechanisms on banana industry,including four aspects.They are establishing the subordinate forecasting systems on Hainan banana industry;constructing information collecting and checking mechanisms of banana industry;establishing information analysis and decision-making systems and constructing information distribution and information sharing systems.The third is to promote the construction of urgency dealing abilities of banana industry.The fourth is to further perfect the risk-defending and protecting systems of banana industry in Hainan.The fifth is to accelerate the standard generation of banana to improve marketing competence.The sixth is to accelerate the development of intermediate agents to improve the organization degrees.And the last one is to put emphasis on the tech-training courses on banana planting and production to improve the technical quality of banana industry. | LIU Yan-qun,ZENG Xiao-hong,FANG Jia Institute of Scientific and Technical Information,Chinese Academy of Tropical Agricultural Sciences,Danzhou 571737,China | 2011 | Asian Agricultural Research2011，3，4： | 0 |
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