向日葵品系对菌核病的抗性鉴定

在2002～2003年连续两年对经初步抗性筛选所获得的儿个向日葵品系进行了菌核病的抗性鉴定．结果表明：在所有的参鉴材料中没有发现免疫类型，但各品系间抗性有一定的差异．经两年的抗性筛选后发现AS02、AS03、AS04、AS07和AS08等5个品系对根腐型和盘腐型菌核病的抗性显著高于生产上中抗杂交种龙葵杂1号等对照品种．     

粒子群优化算法在柔性边缘检测方法选取中的应用

边缘检测是图像处理中很重要的组成部分,其效果好坏直接影响到后面的图像分析。柔性形态变换用于图像边缘检测的方法有多种,粒子群优化(PSO)算法是一种有效的全局优化方法,广泛应用于函数优化,神经网络训练以及模糊系统控制等领域。该文将粒子群算法引入柔性形态学用来选取最佳图像边缘检测方法。实验结果证明,该文所提方法行之有效,值得推广。     

陕西秦岭地区兽类多样性分析

陕西秦岭山地是东洋界和古北界的交汇地带,物种多样性较为丰富.有兽类7目28科82属125种,占陕西省兽类总种数的85.0%.兽类区系组成十分复杂:北方分布型有57种,南方分布型有68种,特有种23种.列入国家重点保护名录、中国物种红色名录和CITES附录的物种有54种,占该区总种数的43.2%.这些珍稀、特有动物主要分布在秦岭地区15个自然保护区内.导致众多物种濒危的原因,主要是栖息地变化和人猎杀等.     

Embryonic development and organogenesis of Chinese giant salamander, Andrias davidianus

The morphology and organogenesis of Chinese giant salamander, Andrias davidianus, in its different developmental periods and stages are described in detail, which provides an intact criterion for distinguishing different stages of its developmental process. Based on the external morphological and internal histological features, six periods including 20 stages of organogenesis of Chinese giant salamander are established, which are cleavage period, blastula period, gastrula period, neurula period, organogenesis stage and hatching stage. Generally, the embryonic development of Chinese giant salamander is consistent with those of Eastern newt, Cynops orientalis, and Black spots frog, R. nigromaculata. However, they have some differences in the early cleavage process and the development of digestive system. The cleavage of Chinese giant salamander, A. davidianus is not a discoidal division type, which is different from other species reported. And the first three cleavages being meridional and a retardant development of its digestive system without halter and sucker existing are the evident features of the embryonic development of Chinese giant salamander.     

基于单片机的超声波测距设计与研究

基于单片机的超声波测距仪。借助压电式陶瓷传感器TCT40-10F/S(1),其适用范围:家用电器和其他电子设备的遥控装置;超声测距,车辆倒车防撞报警装置。     

P systems based multi-objective optimization algorithm

Based on P systems, this paper proposes a new multi-objective optimization algorithm (PMOA). Similar to P systems, PMOA has a cell-like structure. The structure is dynamic and its membranes merge and divide at different stages. The key rule of a membrane is the communication rule which is derived from P systems. Mutation rules are important for the algorithm, which has different ranges of mutation in different membranes. The cooperation of the two rules contributes to the diversity of the population, the conquest of the muhimodality of objective function and the convergence of algorithm. Moreover, the unique structure divides the whole population into several sub populations, which decreases the computational complexity. Almost a dozen popular algorithms are compared using several test problems. Simulation results illustrate that the PMOA has the best performance. Its solutions are closer to the true Pareto-optimal front     

西藏芒康县盐井化探异常分布规律及找矿标志

盐井属于藏东昌都地区芒康县,地处于著名的三江成矿区;藏东地质构造复杂,成矿条件优越,具备形成铜、金、铅、锌、银矿的地质背景,是中国重要的多金属成矿带。根据1∶20万区域化探异常特征优选了芒康县盐井开展1∶5万地球化学测量,Au、Cu、Ag、Pb元素套叠好,异常强度大,属于典型的矿致异常,找矿前景十分广阔,是该区重要找矿靶区。     

Applying partial correlation method to analyzing the correlation between ionospheric NmF2 and height of isobaric level in the lower atmosphere

On the basis of a multiple linear regression model performed for ionospheric NmF2, partial correlation method is first applied to investigating the relation between NmF2 and h (the height of isobaric level) in the lower atmosphere over Wuhan, China during 1957―2004. The results show that partial correlation method can eliminate the influences of solar and geomagnetic activities as well as the seasonal varia- tion factors and reveal the true correlation between NmF2 and h in the lower atmosphere. A weak posi- tive correlation between NmF2 and h is found in the middle stratosphere. In addition, by comparing the partial correlation coefficients between NmF2 and its influence factors, we find that NmF2 is mainly affected by solar activity and the seasonal variation factors, and weakly affected by geomagnetic ac- tivity, but hardly affected by h in the lower atmosphere. The study suggests that partial correlation method is a helpful tool for investigating the correlation between ionospheric parameter and its influ- ence factors.     

Eph受体家族和Ephrin-A5在NSCLCs中上调表达及其临床意义(英)

采用荧光实时定量PCR的方法在48个非小细胞肺癌组织以及配对的正常肺组织中检测Eph/ephrin 基因的mRNA水平.发现肺癌组织中EphB4, EphB3 和 ephrin-A5的表达水平与配对的正常肺组织相比分别上调了60%，81%和65%,并具有显著的统计学差异. 而且，统计学分析发现ephrin-A5的表达水平与肿瘤分型、转移、性别、吸烟以及诊断年龄等临床病理学参数之间存在显著的相关性.此外，EphA2的表达水平与肿瘤大小、家族遗传史以及诊断年龄之间也存在显著的相关性.总之，这些结果提示EphB4, EphA2, EphB3 和ephrin-A5 在肺癌的发生和发展过程中可能以一种单独或者协同的形式发挥作用.这些蛋白有可能成为研究和诊断肺癌的重要靶向基因.     

客车乘客座椅布置的三维参数化设计

介绍了使用三维参数化软件进行客车乘客座椅布置的方法,使用该方法对一城市客车示例进行了乘客座椅布置设计,并分析了方案选择。该实例表明采用该方法可以提高客车座椅布置设计的设计质量和设计效率。