适用不同Brunnstrom等级患者基于表面肌电信号的动作识别方法

针对不同患病程度的脑卒中患者运动意图识别率低的问题,提出了一种适用于不同Brunnstrom等级患者基于表面肌电信号（sEMG）的动作识别方法．首先将所有等级患者sEMG数据进行融合,使用tsfresh库提取特征,然后基于随机森林（random forest,RF）模型筛选特征,并利用筛选的特征训练动作分类模型．进一步,通过研究动作和康复等级的关系,确定了康复评估动作并设计了康复等级自动评估算法．为了验证所提方法的有效性,在24例患者sEMG数据上进行了测试,实验结果表明所提方法能够将9种动作和6类康复等级的平均识别精度分别提升至89.81%和94%．基于所提方法构建的手部康复机器人系统能够实现康复等级自动评估．     

A two-level linearized compact ADI scheme for two-dimensional nonlinear reaction–diffusion equations

A novel two-level linearized compact alternating direction implicit (ADI) scheme is proposed for solving two-dimensional nonlinear reaction–diffusion equations. The computational cost is reduced by use of the Newton linearized method and the ADI method. The existence and uniqueness of the numerical solutions are proved. Moreover, the error estimates in $H^1$ and $L^{\infty }$ norms are presented. Numerical examples are given to illustrate our theoretical results.     

茂职院培养学生工匠精神必要性与可行性的研究

工匠精神是一种职业态度和精神理念,更是一种价值观。在高职教育中培养学生的工匠精神,是中国经济转型升级发展的需要,是企业、高职院校生存发展的需要,也是高职学生个人发展的需要。本文结合茂职院化学工程系人才培养方案以及专业教学实践多种方式,探讨了"工匠精神"培养的必要性和可行性。     

基于组态软件的CNG调压站监控系统设计

在分析压缩天然气（CNG）监控系统功能的基础上,采用组态软件技术设计了一种CNG凋压站监控系统,给出了系统硬件和软件的设计方法．实现了调压站多项运行参数的实时监测与报警、排气、换热、加臭等系统的自动控制．提高了调压站监控系统的智能化和自动化水平。通过系统测试实验表明：该系统具有检测方便、运行可靠、界面友好的特点．可满足CNG调压站各特征参数的测试要求。     

非惯性坐标系下柔性梁的动力学分析与压缩建模

文章针对大范围运动已知的空间柔性梁结构建立其动力学方程.通过研究与分析,提出了文中精确模型,各项矩阵较原有一次耦合模型新增了2类耦合项:即变形耦合项和基点速度和角速度耦合项.通过仿真计算,比较其动力学特性与零次、一次耦合模型的差异,确定各种耦合项的作用,并进行了定性分析.最后研究了复杂系统的压缩建模问题,为工程实际和今后的研究奠定了理论基础.     

基于传播损耗模型的最大似然估计室内定位算法

基于对数正态分布的室内传播损耗模型,本文利用最大似然估计算法,通过迭代估计得到用户与各个接收机之间的距离和相应的传播损耗模型中的遮蔽因子,并由此估计得到室内用户的位置。仿真结果表明,本算法收敛速度快,并有较高估计精度。     

聚乙烯隔离保鲜膜的研制

采用三层共挤吹塑工艺制备了聚乙烯(PE)保鲜膜.其中,A(表层)、B(芯层)、C(表层)各层添加3.0份的遮光及抗紫外线母料;表层(A,C层)的高密度聚乙烯与低密度聚乙烯质量比为1:1,芯层(B层)线性低密度聚乙烯、边角料、CaC03质量比为100:15:30.适当的工艺条件下吹塑的PE隔离保鲜膜对80～100℃的轮胎成型前的胶片隔离、保鲜效果好.     

Investigation on the performance and detoxification of modified low temperature coal tar pitch

In this paper, studies on the modification on the low temperature coal tar pitch extracted from coal tar residue in Inner Mongolia are conducted. First, the low temperature coal tar pitch in liquid state is solidified with a higher softening point by chemical crosslinking modification. The modified coal tar pitch can achieve the standard pavement performance requirements. Then, the effects of chemical crosslinking agent and physical modification additives on the mechanical performance and toxic properties of coal tar pitch are investigated. The detoxification mechanism is also studied, which further promote the applicability of modified low temperature coal tar pitch in the pavement constructions.     

C9石油树脂改性制备吸音矿棉板防水剂的研究

The modified petroleum resin emulsion prepared from the C9 petroleum resin was modified with maleic anhydride. The effects of maleic rosin and maleic anhydride addition level, the modification time and the alkali liquor on the properties of the emulsion were discussed. The results showed that the optimum process conditions covered： a maleic anhy- dride mass fraction of 1.5%, a maleic rosin mass fraction of 10%, a KOH mass fraction of 1%, a petroleum resin modification temperature of 200 ℃, a petroleum resin modification duration of 3 h, and a modified petroleum resin emulsion/ wax emulsion mixing ratio of 1 ： 1. The particle size of modified petroleum resin emulsion prepared under these conditions was equal to 104.166 μm