带ARMA有色噪声的广义系统信息融合Kalman平滑器

对于带自回归滑动平均(ARMA)有色观测噪声的多传感器广义离散随机线性系统,应用奇异值分解,提出了广义系统多传感器信息融合状态平滑问题。基于Kalman滤波方法,在线性最小方差信息融合准则下,给出了按矩阵加权融合降阶稳态广义Kalman平滑器。为了计算最优加权,提出了局部平滑误差协方差阵的计算公式。一个Monte Carlo仿真例子说明了所提方法的有效性。     

蚕丝纤维增强聚乳酸体系中柱晶的形成及结构分析

采用溶液法制备聚乳酸(PLA)薄膜,并利用偏光显微镜在线研究了不同温度及不同牵引速率下,单根蚕丝纤维(SF)诱导PLA柱晶的形成,并利用显微红外光谱表征柱晶结构.结果表明,当牵引速率大于或等于临界速率时,纤维表面有连续的柱晶生成,反之柱晶不连续;当牵引速率大于临界饱和速率时,柱晶的结晶度和取向度分别趋于稳定值;在等温条件下,随着牵引速率的增大,柱晶的成核诱导期缩短,晶体的成核密度增大,取向度增加;当牵引速率一定时,与130℃相比,温度为120℃时形成柱晶的成核诱导期较短,成核密度更大,结晶度更高,柱晶层的生长更快.     

建立河北省高等职业教育体系中若干问题的探讨

对建立河北省高等职业教育体系的依据和原则进行了详细论述。认为河北省高等职业教育的战略重点应突出三个保证：保证产业结构的调整和重点项目对人才的需要;保证河北省“两环开放带动”战略对人才的需要;确保农村对高职人才的需要。提出了河北省高等职业教育的培养目标、课程体系、发展规划和发展途径。简要探讨了河北省高等职业教育管理体制及有关政策。     

天然食品防腐剂——竹叶的研究Ⅲ.肉,豆腐及肉汁的防腐试验

采用不同浓度，不同浸渍时间的ＺＹＴ（竹叶提取液，以下称ＺＹＴ）天然食品防腐剂对肉、豆腐固态食品及肉汁进行防腐试验，结果表明，ＺＹＴ可有效抑制微生物瞎长贮藏期，防腐效果良好。     

从对英语课堂教学的调查看高职高专英语测评机制

针对高职高专英语现有的测评机制,围绕树立本校理念与注重培养学生的英语实际运用能力的相结合这一原则,通过对我院非英语专业学生课堂英语学习的调查,对改革目前的英语能力测试评价机制提出了建议。     

Removal of rain in video based on motion and shape characteristics of raindrops

Rain degrades the performance of the outdoor computer vision system, which adversely impacts tracking, object detection and recognition. To solve this problem, a novel rain detection and removal method is proposed in this paper. Firstly, raindrops are considered as the motion component and extracted by FastICA algorithm. Secondly, raindrops are identified based on its properties of area, direction and width. Finally, a two-step removal method is proposed to replace pixels covered by rain with estimated background pixels. Experimental results show that the algorithm can effectively remove the raindrops in various videos. Compared with traditional rain removal methods, it does not require any parameters about rain, camera and scenes, and only needs three successive frames to recover a raindrops free video.     

气体密度法测定CO_2分子量的实验改进

对气体密度法测定CO_2分子量的实验进行了改进,改进后的方法经实验验证效果满意。     

L-色氨酸衍生的手性相转移催化剂的合成及其不对称诱导效应

以L-(-)-色氨酸为原料,经酯化、季铵化合成了4种手性季铵盐,以L-色氨酸甲酯为原料,经还原、季铵化合成了2种手性季铵盐;6种手性季铵盐对苯甲醛与氯仿的亲核加成反应。显示出良好的相转移催化作用和一定的不对称诱导效应。     

稀土及杂质元素对ZA27合金晶间腐蚀的影响

To understand the influence of impurities and rare earth elements in nature on the intergranular corrosion of the zinc-aluminum alloys, taking efficient methods to retard the inter granular corrosion, the atomic cluster of α phase grain boundary including impurities (Pb, Sn, Cd), rare earth elements (La, Y) and phase grain was constructed by computer programming based on the coincidence-site lattice theory. The recursion method was used to calculate the charge transfer over the grain boundary of α phase, and discuss influence of impurities (Pb, Sn, Cd) and Rare Earth elements (La, Y) on the electrode-potential of Zn and Al. The results shows that impurity elements (Pb, Sn, Cd) can increase the charge transfer between atoms over the grain boundary, leading to the large difference of electrode-potential between Zn and Al. Therefore the eroding is speeding up, but the RE element can reduce the charge transfer between atom sover the grain boundary, and lower the difference of electrode-potential between Zn and Al. Thus RE element is of the role of restraining the inter granular corrosion of zinc-aluminum alloys.