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陈宏 《实验室研究与探索》2011,30(11)
为了掌握实验室设备的质量状况,提出了从质量管理的角度出发,把实验设备纳入测量系统的范畴,对实验教学设备进行质量评价的方法.根据测量系统的过程控制概念、MSA原理和测量系统的评价标准,分析实验设备测量系统的影响因素,建立测量模型,搜集样本和采集测量数据,运用统计软件,分析测量数据的统计特性,根据MSA的评价标准检验结果,得到实验设备测量的质量水平和持续改善实验设备测量质量的方案.通过模拟信号系统噪声测量设备的质量评价过程验证了用MSA评价实验教学设备质量水平的方法.结果表明,该方法在高校实验设备的质量评价中是一种有实用价值的方法. 相似文献
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基于B/S结构的过程控制网络实验系统研究 总被引:1,自引:0,他引:1
面对高校实验教学存在的众多问题,提出了实验设备网络化的思路。以学校的THJ-2高级过程控制实验设备为例,介绍了网络实验系统的结构、组成,将液位控制实验作为典型实验,说明了过程控制网络实验系统的工作过程。最后,分析了开发网络实验室的意义。 相似文献
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陈宏 《实验室研究与探索》2012,31(7):32-37,78
为了掌握实验设备的运行质量状况,从质量管理的角度出发,提出把实验设备纳入测量系统范畴的试验设计(DOE)方法。根据DOE的原理,在测量系统中用统计方法设计试验,采集、分析响应数据,确定测量系统的显著影响因素,从而对实验设备进行可靠性分析。采用DOE分析传感器测量系统可靠性的实例表明,DOE能够以相对少的实验运行次数,最大化掌握测量系统的有用信息,找出测量系统可靠运行的最佳状态,是高校实验设备可靠性分析的一种实用方法。 相似文献
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《实验室研究与探索》2017,(8)
利用LADRC对A3000过程控制系统进行改造,运用实验计算出被控对象数学模型,设计自抗扰控制系统,进而按照A3000控制系统实际参数搭建仿真模型,求取控制参数,实验结果验证了对实验系统改造的可行性,该次实验设备的改造适应了工业控制技术的发展对高校实验教学的新要求,促进了过程控制实验项目的开放性、创新性,教学模式的改革,有利于我校创新型与应用型人才的培养,节约了高校实验设备更新成本,为我校实验设备更新提出新思路。 相似文献
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从过程控制远程实验教学规模化和高校联盟化需求出发,以云计算技术为基础,设计了针对物位、流量和温度等典型工艺参数的过程控制云实验平台。该远程实验平台根据学生类别提供远程控制实验和虚拟实验两种类型的集成实验服务,学生使用浏览器就可以开展从简单控制到复杂控制的多层次过程控制实验操作。克服了传统实验方式的时空局限性,更好地能满足学生的自主实验学习需求。 相似文献
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针对校内过程控制系统实验内容多、PID参数整定麻烦,设备分散,不利于管理的特点。利用JX-300XP与过程控制系统装置进行整合,开发集控制对象、先进控制装置、信息管理为一体的过程控制系统综合实验系统;本文介绍了系统的设计过程,给出了系统的结构框图。 相似文献
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平稳的教学过程是保证教学质量的前提,如何检测和分析教学过程的平稳性是一个难题。基于学院软件技术专业基础课程连续六七年的学生平均成绩,使用统计过程控制中的控制图对教学过程平稳性进行分析。结果表明,控制图在分析教学平稳性方面有一定的实用性,可应用于高校教学过程平稳性分析,为高校教学管理提供较好的数据支撑和决策依据。 相似文献
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针对高职院校教学质量监控评价的特点,应用统计过程控制(SPC)技术和计算机信息技术,分析高职院校教学质量管理流程,构建基于SPC的高职教学质量控制流程框架,开发高职教学质量管理系统。采用控制图和过程能力分析对教学质量控制点进行分析监控,实现了教学质量数据的科学分析和对教学质量的有效控制,提高了高职院校的教学质量。 相似文献
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Design of general multivariable process controllers is an attractive and practical alternative to optimizing design by evolutionary algorithms (EAs) since it can be formulated as an optimization problem. A closed-loop particle swarm optimization (CLPSO) algorithm is proposed by mapping PSO elements into the closed-loop system based on control theories. At each time step, a proportional integral (PI) controller is used to calculate an updated inertia weight for each particle in swarms from its last fitness. With this modification, limitations caused by a uniform inertia weight for the whole population are avoided, and the particles have enough diversity. After the effectiveness, efficiency and robustness are tested by benchmark functions, CLPSO is applied to design a multivariable proportional-integral-derivative (PID) controller for a solvent dehydration tower in a chemical plant and has improved its performances. 相似文献
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陈旭东 《南通职业大学学报》2012,26(1):28-31,59
以机械制造类专业金属冷加工实习为例,应用统计过程控制(SPC)软件对高职实践教学质量进行监控和评价,以实现教学质量的预防性控制和教学过程的动态管理,提高实践教学的质量。 相似文献
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The expression of residual is obtained according to its dynamic response to mean shift,then the distribution of T 2 statistic applied to the residual is derived,thus the probability of the T 2 statistic lying outside the control limit is calculated.The above-mentioned results are substituted into the infinite definition expression of the average run length(ARL),and then the final finite ARL expression is obtained.An example is used to demonstrate the procedures of the proposed method.In the comparative study,eight autocorrelated processes and four different mean shifts are performed,and the ARL values of the proposed method are compared with those obtained by simulation method with 50,000 replications.The accuracy of the proposed method can be illustrated through the comparative results. 相似文献
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An important feature of the traffic in mobile networks is burstiness. Drawbacks of conventional power control algorithms for time division duplex (TDD)-code division multiple access (CDMA) systems are analyzed. A joint power control algorithm based on service factor is presented to address the TDD-CDMA mobile services in the burst mode according to the Markov modulated Bernoulli process. The joint power control equation is derived. A function model is developed to verify the new algorithm and evaluate its performance. Simulation results show that the new power control algorithm can estimate interference strength more precisely, speed up convergence of power control, and enhance power efficiency and system capacity. It is shown that the proposed algorithm is more robust against link gain changes, and outperforms the reference algorithms. 相似文献
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Lichun Gai Changlong Zheng Norman G. Lederman Judith S. Lederman Huihong Jiao 《International Journal of Science Education》2019,41(9):1228-1245
The purpose of this study is to examine the salient characteristics of the ‘Question-Answer Process’ (QAP) in senior high school chemistry class between pre- and in-service teachers. We first developed the ‘Instrument of Question-Answer Process’ (IQAP), and then, applied it to compare salient characteristics of QAP between pre- and in-service teachers. Data collection consists of classroom observation and structured-interview. Participants are seven pre-service and seven in-service chemistry teachers. The results are: (a) Both pre-and in-service teachers ask most of the questions and students ask few questions; (b) Pre-service teachers ask more lower cognitive level questions, while in-service teachers ask more higher cognitive level questions; (c) Pre-service teachers tend to ask non-volunteer students while in-service teachers tend to ask volunteer students to respond; (d) Pre-service teachers tend to be ‘no feedback or ignore’ after students provide answers and both pre- and in-service teachers seldom guide students to reflect on answers; and (e) The frequency of authority of ‘student’ in pre-service teachers’ class is much higher than those in in-service teachers’ class, while the frequency of authority of ‘teacher and student’ is much lower than those of in-service teachers’ class. 相似文献
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程昆山 《安徽教育学院学报》2005,23(3):60-62
本文探讨了CMM二级KPA软件配置管理(SCM)的实施方案,阐述了实施SCM过程所需的组织结构、文件体系、过程和资源,着重于流程定义和配置评审等关键活动,描述了软件配置过程的实施. 相似文献
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介绍了现有联机分析处理,数据挖掘概念,重点介绍了联机挖掘处理,在联机分析挖掘的基础上提出了一种多数据源流程式数据挖掘的系统框架。 相似文献
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Shi Fei Zheng Fangjing 《上海大学学报(英文版)》1998,2(4):295-300
y Control Based on Genetic Algorithm and Its ApplicationsTX1IntroductionMembershipfunctionisthebasisforfuzzylogictheorytoappli... 相似文献