数控机床综合监测系统教学项目设计与实施

采用嵌入式STM32微处理器研制数控机床车间现场监测仪,实时采集数控机床的运行参数和工艺参数,通过Zigbee无线网络通信将监测数据上传至车间级管理甲台。基于图形化编程软件LabVIEW开发相应的用户管理系统,可对采集数据进行处理,结果可供管理者实时查询,从而实现制造车间数控机床运行状况和实际综合能效的可视化远程监测、统计分析和综合管理。学生科技创新团队以该项目作为载体,实施了能力进阶型系列化探究式项目教学实践,学生工程能力得到了很好的锻炼。     

基于蚁群算法在交通领域的应用综述

蚁群算法是受现实蚂蚁群体行为启发而得出的一类仿生算法。从蚁群算法与实际交通问题的求解有很强直接对应特性出发,对蚁群算法在交通领域的应用进行全面综述。蚁群算法也可应用于交通过程建模、交通过程优化及导航、交通运输规划等交通领域。     

A cyclic pursuit framework for networked mobile agents based on vector field approach

This paper proposes a pursuit formation control scheme for a network of double-integrator mobile agents based on a vector field approach. In a leaderless architecture, each agent pursues another one via a cyclic topology to achieve a regular polygon formation. On the other hand, the agents are exposed to a rotational vector field such that they rotate around the vector field centroid, while they keep the regular polygon formation. The main problem of existing approaches in the literature for cyclic pursuit of double-integrator multiagent systems is that under those approaches, the swarm angular velocity and centroid are not controllable based on missions and agents capabilities. However, by employing the proposed vector field approach in this paper, while keeping a regular polygon formation, the swarm angular velocity and centroid can be determined arbitrary. The obtained results can be extended to achieve elliptical formations with cyclic pursuit as well. Simulation results for a team of eight mobile agents verify the accuracy of the proposed control scheme.     

Understanding the topic evolution of scientific literatures like an evolving city: Using Google Word2Vec model and spatial autocorrelation analysis

Topic evolution has been described by many approaches from a macro level to a detail level, by extracting topic dynamics from text in literature and other media types. However, why the evolution happens is less studied. In this paper, we focus on whether and how the keyword semantics can invoke or affect the topic evolution. We assume that the semantic relatedness among the keywords can affect topic popularity during literature surveying and citing process, thus invoking evolution. However, the assumption is needed to be confirmed in an approach that fully considers the semantic interactions among topics. Traditional topic evolution analyses in scientometric domains cannot provide such support because of using limited semantic meanings. To address this problem, we apply the Google Word2Vec, a deep learning language model, to enhance the keywords with more complete semantic information. We further develop the semantic space as an urban geographic space. We analyze the topic evolution geographically using the measures of spatial autocorrelation, as if keywords are the changing lands in an evolving city. The keyword citations (keyword citation counts one when the paper containing this keyword obtains a citation) are used as an indicator of keyword popularity. Using the bibliographical datasets of the geographical natural hazard field, experimental results demonstrate that in some local areas, the popularity of keywords is affecting that of the surrounding keywords. However, there are no significant impacts on the evolution of all keywords. The spatial autocorrelation analysis identifies the interaction patterns (including High-High leading, High-Low suppressing) among the keywords in local areas. This approach can be regarded as an analyzing framework borrowed from geospatial modeling. Moreover, the prediction results in local areas are demonstrated to be more accurate if considering the spatial autocorrelations.     

藏书害虫衣鱼的防治

衣鱼是图书馆里最具有危害性的蛀书害虫。本文首先浅述衣鱼的基本情况,再进一步揭示衣鱼对纸的嗜食程度以及与纸张品类的关系,最后讨论衣鱼的防治方法。     

通用题库数据结构与组卷算法设计

题库的数据结构和组卷算法决定了题库的适用范围,该文根据不同课程试卷及其试题属性的构成,提出一种新的题库数据结构,并在分析组卷控制模型的基础上,对组卷算法进行详细设计。     

WEB环境下实验教学系统研究

针对网络教学中缺乏实验环节的问题,本文采用ASP、SQLServer和Java集成架构实现了web环境下机电系统的远程实验。利用该平台用户可以通过网络设计控制算法、调整远端机电系统的控制参数,实验运行结果和现场图像也可反馈给用户端。应用效果验证了该网络远程实验教学系统的有效性和可行性。     

高职管理学基础课程实训模式

在分析高职管理课程特点与总结长期改革实践经验的基础上,探索提出坚持能力导向、项目驱动的原则,以模拟管理为主体,以团队自我控制为主导,构建以能力训练单元为基础的三级实训结构体系。     

Multisim在组合逻辑电路设计中的应用

介绍了电子仿真软件Muhisim在组合逻辑电路设计的常用元件,通过设计一个四变量的楼道路灯控制系统的实例进行探讨。根据电路的功能需求得出逻辑表达式,在Muhisim中选用与非门搭建电路并进行仿真。实践证明,基于Muhisim设计组合逻辑电路的效率很高,仿真验证比较方便,对实际电路的制作能带来很大帮助,具有较高的实践指导意义。