阐述了一种新型焦罐运载车旋转定位控制系统.该控制系统采用英威腾Goodrive35系列工程型闭环矢量控制变频器驱动旋转电机,利用该变频器的数字定位功能,结合编码器的脉冲反馈值和检测开关的位置反馈信号,实现焦罐旋转控制的精确定位.

面对产业园区内企业从业者普遍素质较低,特别是高技能人才的短缺,制约园区经济持续健康发展的困境,文章从利益相关者等理论阐述入手,以机械制造岗位为例,调查研究产业园区内企业员工提升技能的培训需求现状,探索校企合作新模式,充分发挥高职院校的设备、场地、人力资源等优势,开设多种针对性培训项目,明显提升了企业员工岗位技能,推进了校企深度合作,提高了学校教师队伍素质和学校社会服务能力,扩大了学院的社会影响力.

In order to meet the requirement of grid-connected current harmonics with the IEEE Std.1547 standard,the LCL filter is generally used in the grid-connected PV inverter applications to deeply attenuate high-frequency harmonics.However,the introduction of LCL filters will reduce the stability of system.In order to solve this problem,a novel passive damping control strategy is presented in this paper.Then parallel passive damping and system operation theory are analyzed in detail,and the stability is also studied.In the end,the presented control scheme is simulated by the MATLAB/Simulink.Simulation results show that the instability issue caused by LCL harmonics can be effectively resolved by proposed scheme,which guarantee the grid-connected current harmonics to conform to the IEEE standards.

目的 在生物反馈闭环系统中用人工智能技术代替专家对测试信号进行判断和决策,并将此智能生物反馈系统应用于焦虑症的治疗.方法 采用独立分量分析和RBF神经网络方法对反映病症的皮电和肌电信号进行特征提取和模式识别,实现系统的自动诊断.同时,还在生物反馈系统中加入仿传统针法的智能电刺激器.结果 提取的焦虑症患者和正常人的皮电信号差别明显,计算机能够得出正确判断.结论 临床实践证明通过生物反馈放松训练确能有效缓解焦虑症状,系统自动诊断的正确率基本满足初步诊断的要求.

高职高专专业课程体系建设应立足于培养满足社会发展需要的高等技术应用性专门人才,结合实际介绍了我院电子信息工程技术专业课程体系结构的研究与实践经验.

This paper analyzes the traditional PID control arithmetic in-depth and modifies the integral part.It describes subsection integral,shift integral and non-linear shift integral.The above methods greatly improve the controlling effect actually.

针对电火花加工的特点,分析了关键指标的影响因素和改善的方法,提出了利用单片机控制电火花加工电源的策略.采用先进的开关电源技术和新型的控制电路,通过软件编程,可根据加工工艺的需要,自由设定并产生最合理的加工参数,最终提高产品的精度和加工的效率.