月表虹湾地区辉石及橄榄石含量反演

月表成分定量分布是月球探测中重要的一个科学问题．为了建立月表虹湾地区辉石与橄榄石的含量反演模型,本文在深入分析理解月表主要矿物的光谱特性的基础上,首先使用LSCC实测矿物数据,根据辉石、橄榄石在300-2600nm波谱范围的吸收特征分布,通过MGM模型计算19个采样点的光谱数据的5个吸收特征,每个吸收特征有吸收中心（Center）、吸收宽度（FWHM）、吸收强度（Strength）这3个吸收特征参数,利用多元回归分析建立矿物反演模型．由于缺乏月表实测数据,本文弓1入M^3高光谱数据利用Hapke辐射传输模型制作模拟混合矿物光谱对模型性能进行检验．最后,将反演模型应用于嫦娥三号月球车的首选着陆点一虹湾地区,得到其矿物含量分布图．实验表明利用MGM模型拟合分析的方法进行高光谱遥感矿物识别是一种可行的研究方法．     

Agent的多目标优化分布式智能算法

根据多目标优化的理论,将传统多目标优化的方法与Agent技术相结合,提出一种基于Agent技术的多目标优化分布式智能算法．在该算法中,每个智能体由目标函数、协调算法和通信模块组成．由智能体组成多目标优化的多智能体系统．通过每个Agent的独立优化和Agent之间的通信和协调。实现多目标优化．文中用实例验证算法的有效性．     

Overexpression of phospholipase <Emphasis Type="Italic">D</Emphasis>α gene enhances drought and salt tolerance of <Emphasis Type="Italic">Populus tomentosa</Emphasis>

The cDNA of AtPLDa （Arabidopsis thaliana Phospholipase Da） gene was introduced into P. tomentosa （Populus tomentosa） under the control of the Cauliflower mosaic virus 35S promoter. Southern and Northern blot analyses suggested that the AtPLDa gene has been transferred into the P. tomentosa genome. No obvious morphological or developmental difference was observed between the transgenic and wild-type （WT） plants. Drought and salt tolerance and gene expression of seedlings of several transgenic lines and WT plants （control） were studied. The results showed that the rhizogenesis rate and the average root-length of transgenic lines were significantly higher than WT plants after mannitol and NaCI treatment under the same growth conditions. Northern blot analysis indicated that the higher the PLDa expression in the transgenic plants, the more tolerant the transgenic plants are to drought and salt treatment. Meanwhile, another group of these transgenic lines and WT plants （control） were treated with PEG6000 and NaCI separately. The contents of chlorophylls and the activities of some anti- oxidant enzymes （superoxide dismutase, guaiacol peroxidase and catalase） as well as malondialdehyde and relative electrical conductivity were analyzed. Altogether, our results demonstrated that overexpression of the PLDa gene can enhance the drought and salt tolerance in transgenic P. tomentosa plants.