Pattern transition and regulation in a subthalamopallidal network under electromagnetic effect

Although the significant roles of magnetic induction and electromagnetic radiation in the neural system have been widely studied, their influence on Parkinson's disease (PD) has yet to be well explored. By virtue of the magnetic flux variable, this paper studies the transition of firing patterns induced by magnetic induction and the regulation effect of external magnetic radiation on the firing activities of the subthalamopallidal network in basal ganglia. We find: (i) The network reproduces five typical waveforms corresponding to the severity of symptoms: weak cluster, episodic, continuous cluster, episodic, and continuous wave. (ii) Magnetic induction is a double-edged sword for the treatment of PD. Although the increase of magnetic coefficient may lead the physiological firing activity to transfer to pathological firing activity, it also can regulate the pathological intensity firing activity with excessive β-band power transferring to the physiological firing pattern with weak β-band power. (iii) External magnetic radiation could inhibit continuous tremulous firing and β-band power of subthalamic nucleus (STN), which means the severity of symptoms weakened. Especially, the bi-parameter plane of the regulation region shows that a short pulse period of magnetic radiation and a medium level of pulse percentage can well regulate pathological oscillation. This work helps to understand the firing activity of the subthalamopallidal network under electromagnetic effect. It may also provide insights into the mechanisms behind the electromagnetic therapy of PD-related firing activity.     

图书馆大流通服务模式的特点及对策

随着图书馆服务模式不断升级，新型服务管理模式得到推广与使用，既方便了师生查阅文献资料，也降低了管理人员的工作难度。阐述了大流通服务的概念，分析了大流通服务模式的特点，提出了推进图书馆大流通服务的对策。     

一种自适应步长的复合梯度加速优化算法

自适应步长加速(Adam)类算法由于其计算效率高、兼容性好的特点，成为近期相关领域的研究热点.针对Adam收敛速度慢的问题，本文基于当前梯度、预测梯度以及历史动量梯度，提出一种新型Adam类一阶优化算法——复合梯度下降法(C-Adam)，并对其收敛性进行了理论证明.与其他加速算法的区别之处在于，C-Adam将预测梯度与历史动量区别开，通过一次真实的梯度更新找到下一次迭代更精准的搜索方向.利用两组常用测试数据集及45钢静拉伸破坏实验的实验数据对所提算法进行验证，实验结果表明C-Adam与其他流行算法相比较具有更快的收敛速度及更小的训练损失.     

焊接过程的RBF神经网络建模

介绍了RBF神经网络的性能和算法结构 ,建立了RBF神经网络在船舶焊接过程中用于焊接变形预测分析的模型 ,并探讨了其应用和发展趋势     

关于高师院校计算机专业教学改革的几点建议

本文以高等师范院校计算机专业教学改革为例,从教育观念的更新、教学模式的转变、教学手段的更新、教学对象的再认识、教学中的教材教法等多个方面分析以网络为主的现代教育模式改革的思想,目的在于探索出一条以多媒体和网络为主体的教学环境下的教育新思路。     

Permutation Analysis of Track and Column Braiding

Introduction Trackandcolumnbraidingisanavailable3D braidingmethod[1～3],whichperformsbraidingprocessbymovingbraidingcarriersalongroworcolumndirection alternatively.LiandDing[4]examinethebraidingmethod andconcentratetheirstudyonthemovementofbraiding carriersonthebraidingplatform,onwhichthebraiding tracksarelocated.Accordingtothebraidingprinciple,a studyofbraidingprocessisactuallyastudyofthemovingpatternofyarnendsonthebraidingplatform.Intheiranotherpaper[6],thepositionsofbraidingcarriersare r…     

图析宁波电视收视格局

文章对宁波的电视收视总体格局、晚间时段各电视频道的竞争态势,以及电视剧在宁波的收视情况作了由总及分的探讨和分析,将数据做成图表的形式形象、科学地解构了宁波电视的收视格局,对了解宁波电视收视情况和促进各台竞争提供了实际的参考价值.     

时滞测试能量函数的局限性分析和改进模型

针对时滞试能量函数，分析了它在无冒险强健测试矢量生成时存在局限性和表达式较复杂的不足。在此基础上建立了无冒险条件下的时滞试能量函数，从而完善了Chakradhar提出的时滞测试能量和相应的测试生成算法。     

Real time estimation of CO2 laser weld quality for automotive industry

Laser welding is one of the most precise welding processes in joining sheet metals. In laser welding, performing real time evaluation of the welding quality is very important to enhance the efficiency of the welding process. In this study, the plasma and spatter, which are generated during laser welding, are measured using UV and IR photodiodes. The factors that influence weld quality are classified into five categories; optimal heat input, slightly low heat input, low heat input, partial joining due to gap mismatch, and nozzle deviation. The data number deviated from reference signals and their standard deviations were also considered to evaluate the qualities. A system was also formulated to perform real time evaluations of the weld quality using a fuzzy multi-feature pattern recognition with the measured signals.     

硅栅CMOS集成电路测试图形的研究

本文介绍了用于硅栅CMOSIC园片级工艺诊断和可靠性监控的微电子测试图形。重点论述了(1)用于检测漏、源及多晶硅薄层电阻和因扩散及腐蚀引起的横向变化量的组合结构,(2)用于监测CMOSIC动态参数的结构设计及其对工艺的评价。