大豆遗传群体选择与品质QTL的获得

本文以高油品种哈交97-5404-1为母本,以哈交99-5448-4为父本,建立重组自交系群体.应用SSR技术,对不同世代F2∶3,F2∶6、F2∶9遗传群体中的油份QTL定位进行了分析,不同世代大豆分离遗传群体中油份含量均接近于正态分布,油份含量性状表达偏向于母本哈交97-5404-1,F2∶3代获得了对油份贡献率较高的QTL,F2∶9代则获多个与油份相关的QTL,大豆F2∶3和F2∶9代的遗传群体适宜用做品质性状的QTL定位,不同世代定位的油份QTL,均与SSR位点Satt193有关,通过对来自全国不同品种的SSR进行了分析和方差分析证实,Satt193在第一等位变异下(即DNA片段长度为270 bp)做为油份的筛选标记具有实用性,而在第三等位变异下(即DNA片段长度为220 bp)做为蛋白质材料的筛选标记具有应用性.     

黄精种子形态及发芽特性研究

研究了黄精果实及种子不同发育时期内源激素ABA含量的变化与收获种子类型,以及不同类型黄精种子形态、生活力、千粒重与发芽的相关性.结果表明:3种类型黄精种子属不同发育时期的种子,其外观形态和各种物理特性指标都存在一定差异,其中黄皮种子最大,长、宽平均值分别为4.372 mm和3.710 mm,活性较弱,发芽率45.16%;绿皮种子的千粒重、生活力、发芽率均最高,分别为35.6 g、85%和85.71%;黑皮种子基本没有生活力.说明绿皮种子质量最好,黄皮种子次之.     

Modeling and simulation based on open electrical impedance tomography

In order to improve the error in image reconstruction caused by changeable positions of the electrodes in closed electrical impedance tomography, we propose an open electrical impedance tomography (OEIT) model using fixed electrode array. The problem was approximately assumed to be a virtual field by defining certain local sensitive area instead of solving the boundary problem in the whole electromagnetic field strictly. Modeling and simulation of OEIT have been conducted to define reasonable boundary parameters and electrode array structure. The finite element method is used for forward computation while Newton one step error reconstructor is used for image reconstruction. The target position, area and conductivity change can be reflected by the relative change of the boundary voltage and the reconstructed image is clear. Better resolution and positioning accuracy can be obtained in the shallower surface of the body by OEIT, so it is valuable in clinical applications.     

我国转基因抗虫棉研究与应用

我国转基因抗虫棉研究起步于20世纪90年代,1992年人工合成了GFMcrglAcryBt基因,1995年研制成功了CrylA+CPTI双价抗虫基因,并相继育出了单价、双价和杂交抗虫棉新品种。转Bt基因抗虫棉不同生育阶段,不同部位对棉铃虫的抗性不同。对3龄以上的棉铃虫毒死率明显下降。转Bt+CPTI抗虫棉与转Bt基因抗虫棉有相似的抗虫性,但抗虫具有广谱性,且对大龄棉铃虫的杀伤效果显著高于Bt基因抗虫棉。转基因抗虫棉已推广应用847万hm²,累计创社会经济效益220多亿元。     

本溪山区极端降水指数的变化特征分析

为了进一步探讨降水及洪涝灾害发生规律,合理开发利用本溪山区水资源,利用本溪草河口气象站1953—2012年逐日降水资料,分析了本溪山区6个极端降水指数的变化趋势。结果表明：本溪山区年降水量年际差异较大,年降水量无显著的变化趋势;四季降水量也无明显的变化趋势。年降水日数呈明显的减少趋势,从1974年本溪山区降水日数开始减少;除春季降水日数变化趋势不明显外,其他各季均呈显著的减少趋势变化;夏季在1976年,秋季在1987年发生突变。降水强度无明显的变化趋势;最大5日降水量趋势变化不明显,但年际间差异较大;年极端降水事件无显著的变化趋势,20世纪50、60、80年代为偏多时期。     

Weighting Coefficient Optimization Unification of Lexicographic Method in Fuzzy Multi -objective Optimization Design

The Lexicographic method has subjective and empirical character,so a weighting coefficient is introduced by considering the importance and proportion of each individual object,the preferable result of every individual object can be confirmed by comparing the degree of similarity between the perfect one and the ecumenic one and the Fuzzy optimization will be perfect.The effectiveness of these methods is illustrated by a fuzzy optimal design of the three-bar truss.     

Video Monitor and Control System of Tunnel Based on DSP/BIOS

A video Monitor &Control system of tunnel based on DSP/BIOS is proposed,which is different from traditional video Monitor & Control system.It uses DSP to process image,and uses enhanced video input processor to qcquire image.This system satisfies all requirements of video supervision,and is a low cost system.It has a good application foreground.The system has been confirmed as a good veracity and practicability system through testing in the Zhongliang Mountain tunnel of Chongqing.     

四个观赏海棠品种光合特性比较研究

为比较引种观赏海棠品种间光合特性,以海棠粉芽、红宝石、凯尔斯和绚丽为试材,测定了净光合速率(Pn)、胞间CO2浓度(Ci)、气孔导度(Gs)、蒸腾速率(Tr)等光合生理指标和光响应曲线.结果表明:凯尔斯净光合速率的日变化呈单峰型,但粉芽、红宝石和绚丽的净光合速率的日变化呈双峰型.胞间CO2浓度日变化均呈V型曲线变化,均...