四川省科技成果现状分析与对策研究

为了提高四川省的科技创新能力,有针对性地开展科学研究,通过对四川省2001-2009年科技获奖成果统计分析,提出了加快该省科技创新体系建设的若干建议。     

集体林权制度改革背景下广西林农认知和参与林业科技服务程度分析

基于广西3县7个村镇334户林农问卷调查的统计结果,对广西林农认知和参与林业科技服务的现状进行分析。结果表明：林权改革后的广西大多数林农拿到了林权证,80%以上的林农关注过乡政府或村委会承办的林业知识宣传栏,但仅有47.6%的林农在分到林地后接受过林业知识或技术培训,43.4%的林农接受过林业专家的林业科学技术指导;另外,通过林农林地拥有量与愿意参与林业科技服务活动的相关性分析后发现,林地较多的林农需要科技服务的意愿要强于林地较少的林农,林地越多的林农进行经营管理的活动就越多。由此可知,广西林农对于林业科技服务的认知和参与程度还不是很高,有待相关管理部门和研究学者进一步研究,找寻其中的主要原因。     

随机环境下多目标设计优化问题的交互式算法

从通信网络和运输安排等工程问题中提出了一类多目标随机优化模型,该模型含有一个随机线性和随机二次目标函数,还含有随机线性约束.基于决策者的期望水平将多目标优化模型转化为单目标优化问题;利用新的方差期望综合法研究了此类优化问题的确定型等价类,并设计了求解这类问题的基于决策者偏好的交互式算法.数值实验表明:方差期望综合优于已有方法,它既能够反映决策者的满意度,又能够得到更稳健的最优解.     

Cloning and Expression of Gene Responsible for High-Tillering Dwarf Phenotype in Indica Rice Mutant gsor23

High-tillering dwarf mutant gsor23 was generated from an indica rice variety Indica9 radiatied by γ-ray. Genetic analysis showed that this phenotype was controlled by one single recessive gene, which was mapped within a physical distance of 386 kb between two insertion-deletion (InDel) markers C1-WT2 and C1-WT4 on the long arm of chromosome 1. There is a known gene D10 within this region, the mutation of which causes high-tillering in rice. Sequence analysis of the D10 allele in gsor23 revealed that the base cytosine (C) at the 404^th position in the coding region was deleted, which would cause frameshift mutation after the 134^th amino acids. The mutation site and indica background of gsor23 were different from the previously reported japonica mutants d10-1 and d10-2. Therefore, gsor23 is a novel allelic mutant of D10 which encodes the carotenoid-cleaving dioxygenase 8 (CCD8), a key enzyme involved in the biosynthesis of the new plant hormone strigolactones (SLs). After treatment with GR24, a synthetic analogue of SLs, the high-tillering phenotype of gsor23 was restored to normal. Real-time RT-PCR analysis showed that D10 expression was high in roots, but low in leaves. Compared with the wild type Indica9, the expression of the SL biosynthesis gene D10 was upregulated, while genes likely involved in the SL signal transduction pathway such as D3 and D14 were down-regulated in the gsor23 mutant.     

关中西部黄土丘陵沟壑区退耕政策实施效果及对农民生计的影响——以麟游县九成宫镇为例

为了适应世界可持续发展战略要求,改善我国人口的生存环境,缩小东西部经济发展差距,党和政府制定了西部大开发战略,并将退耕还林作为整个西部大开发的根本点和切入点。自实施退耕还林以来,西部的生态环境有了改善,但在具体实施中还存在不少问题。现以陕西省麟游县九成宫镇为例,对退耕还林工程进行实地调查,针对其存在问题提出了一些对策,以期对该地的经济发展和以后的退耕还林工作有一定的借鉴。     

论高校数字图书馆定位的转变

高校图书馆要适应信息化、开放性图书馆的要求,把图书馆建成现代化的数字图书馆。首先阐述了数字图书馆的特征,然后分析了我国高校数字图书馆建设状况及存在的问题,最后指出了数字图书馆定位的转变。     

Relationship Between Heterosis and Parental Genetic Distance Based on Molecular Markers for Functional Genes Related to Yield Traits in Rice

The genetic distances among 18 cytoplasmic male sterile lines and 11 restorer lines were analyzed with molecular markers derived from yield-related functional genes.The correlation between parental genetic distance and heterosis was investigated by analyzing the performance of 47 combinations.The results showed that the genetic distance was significantly correlated with yield heterosis(r=0.29*),but not significantly correlated with heterosis for other traits,such as number of effective panicles per plant,se...     

基层政府战略发展思考 ——以巴中市平昌星光工业园为例

面对经济发展的新常态,为实现地区经济的持续健康增长,基层政府结合地区优势,招资引商,吸收外部企业,促进当地的发展.文章通过分析巴中市平昌星光工业园在此区的建设优势,为政府在工业园发展过程中所出现的问题提出相关建议,实现基层政府在园区的产业结构升级与转型的促进作用,推动当地经济社会的持续健康发展.     

VAc/nBA/AA共聚合乳液涂膜对苹果树抗寒性的研究

研究了 VAc/n BA/AA三元共聚合乳液的合成工艺 ,并进行了性能测试 ,将该乳液涂于果树表面 ,用电导法等测定乳液对果树的保水、御寒功能。结果表明 ,该乳液对果树具有明显的保水和御寒作用     

杏棉间作复合系统对棉花产量及纤维品质的影响

以大田棉花为对照(CK),研究了环塔里木盆地杏、棉间作系统对棉花的产量和纤维品质特性的影响.结果表明:杏、棉间作下棉花的产量及其构成因素相比对照均有不同程度的减小,且随着距杏树垂直距离的增加,其变化呈偏态分布趋势；在杏、棉间作区,棉花的比强度、伸长率和马克隆值明显减少,而纤维长度、整齐度、黄度和纺纱指数则形成了明显的增...