三价脊髓灰质炎活疫苗在不同地区人群的基础免疫应答

应用同一批三价脊髓灰质炎活疫苗(TOPV),于夏季分别在我国吉林、湖北和广西壮族自治区观察人群的基础免疫应答.3次免疫后发现,Ⅰ、Ⅲ型,吉林儿童的血清中和抗体阳性率高于广西儿童,且有显著性差异,抗体几何平均滴度(GMT)北方高于南方,吉林与湖北、广西之比,除了吉林与广西Ⅲ型之比外,其他皆有显著性差异。     

Cleaner Production of Wheat Straw Pulp

A pulping method using NH4OH with less amount of KOH as cooking liquor on wheat straw was developed. KOH could reduce consumption of NH3 and cooking time for its strong alkalinity. The effects of various pulping conditions such as composition of cooking liquor, liquid-to-solid ratio, maximum temperature, cooking time to the maximum temperature and cooking time at the maximum temperature were studied. Experimental results indicated that the rate of delignification was 85.12% and the pulp yield was 49.65% under suitable pulping conditions. It looks promising to use black liquor containing nitrogen, phosphorus, potassium and organic substance as fertilizer resources for agricultural production. A new pattern of ecological cycling may be set up between paper industry and farming.     

“重成分后置倾向”与“V+复合趋向动词”带从句宾语语序分析——以“出来”为例

采用统计分析和抽样调查的方法,从共时平面考察"V+复合趋向动词"带从句①宾语的句法表现,从认知心理的角度探索制约其原因,结果发现:"V+复合趋向动词"带从句宾语时,采用"V+复合趋向动词+从句宾语"格式,是受"重成分后置倾向"制约的结果.     

新的C RBF神经网络分类器的设计与实现

从RBF神经元的几何意义出发,提出了一种新的用于模式识别的C-RBF神经网络分类器.与传统RBF网络相比,该算法能够自动地优化RBF网络中核函数的个数、中心和宽度,且由于竞争神经元的引入,省去了传统RBF神经网络输出层线性连接权的计算,从而简化了网络的学习过程,大大缩短了训练时间.     

Prediction of dust fall concentrations in urban atmospheric environment through support vector regression

Support vector regression (SVR) method is a novel type of learning machine algorithms, which is seldom applied to the development of urban atmospheric quality models under multiple socio-economic factors. This study presents four SVR models by selecting linear, radial basis, spline, and polynomial functions as kernels, respectively for the prediction of urban dust fall levels. The inputs of the models are identified as industrial coal consumption, population density, traffic flow coefficient, and shopping density coefficient. The training and testing results show that the SVR model with radial basis kernel performs better than the other three both in the training and testing processes. In addition, a number of scenario analyses reveal that the most suitable parameters (insensitive loss function e, the parameter to reduce the influence of error C, and discrete level or average distribution of parameters σ) are 0.001,0.5, and 2 000, respectively.     

基于神经网络干扰观测器的Terminal滑模控制

针对一类非线性不确定系统,通过构建动态干扰观测器系统,提出一种快速神经网络干扰观测器。根据干扰观测误差在线调节神经网络权值,实现对未知综合干扰的逼近,逼近误差一致最终有界。基于神经网络干扰观测器设计了自适应Terminal滑模控制方案,严格证明了闭环系统状态在有限时间内收敛到零,从而提高了状态的收敛速度。最后,通过一个倒立摆的仿真例子,验证了系统的快速性和神经网络干扰观测器的逼近能力。     

改进Harris-SIFT算法在双目立体视觉中的应用

针对双目立体视觉图像匹配的实时性问题,提出了一种改进Harris-SIFT算法,克服了原SIFT算法提取的特征点不是角点且耗时长等问题。该算法首先用改进Harris算子进行角点提取,然后用SIFT算子构建特征描述子,最后对提取的特征点采用欧氏距离度量点对的相似性,利用最近邻搜索策略进行特征匹配。在VC++6.0与Open CV平台上,通过实验比较了所提算法与SIFT算法的特征点提取匹配结果,证明了所提算法的有效性与实时性。     

代数约简的知识粒度表示及其高效算法

首先提出了修正相对粒度计算公式,给出其单调性证明以及等号成立的充要条件;然后证明了保持修正相对粒度不变是保持正区域不变的充要条件,并给出代数约简的知识粒度表示;最后讨论了现有相对粒度与修正相对粒度之间的关系,利用修正相对粒度的单调性给出计算属性重要性定义及其递归计算公式,进而利用基排序思想计算等价类,设计出一种计算决策表代数约简的高效算法.实验结果表明该算法是可行且高效的.     

培植企业文化是加强和改进企业思想政治工作的有效途径

当前,随着改革开放的深入发展,我国正在经历一场全面而深刻的伟大变革,人们的思想意识、道德观念、价值取向也在发生剧烈的变化。企业思想政治工作怎样才能适应新形势,保证改革和建设的顺利进行?企业党组织和思想政治工作者,包括很多优秀的企业家,正在锐意进取,积极探索思想政治工作的新路子,创造了很多宝贵的新鲜经验。其中,把建设企业文化作为着眼点,使企业的思想