屏蔽门系统在郑州地铁中的应用     

陈光伟  索小娟 《漯河职业技术学院学报》2013,12(2):93-94

结合郑州地铁的建设进度和建设方案,介绍了地铁屏蔽门系统在其中的应用。文中重点介绍了屏蔽门系统的组成,并分别对机械部分和电气部分的构成、功能等作了详细的分析,同时又阐述了屏蔽门系统与其他系统的接口设计问题。  相似文献   

《行政事业单位内部控制规范(试行)》解读     

王留强 《周口师范学院学报》2013,(3)

2012年,财政部颁布了《行政事业单位内部控制规范(试行)》,开启了我国行政事业单位内部控制建设的新时代.该规范的颁布,必将对推进我国行政事业单位改革,提高行政事业单位的服务效益起到积极的推动作用.分析了该规范的特点,针对如何完善该规范提出了一些建议和措施.  相似文献   

数控机床综合监测系统教学项目设计与实施     

汪木兰  汪博  陈梦嘉  费凯成 《中国现代教育装备》2013,(21):4-8

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。  相似文献   

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

Hamed Rezaee  Farzaneh Abdollahi 《Journal of The Franklin Institute》2019,356(2):1113-1130

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.  相似文献   

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

Kai Hu  Qing Luo  Kunlun Qi  Siluo Yang  Jin Mao  Xiaokang Fu  Jie Zheng  Huayi Wu  Ya Guo  Qibing Zhu 《Information processing & management》2019,56(4):1185-1203

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.  相似文献   

Immunomodulatory function of orally administered thymosin α1     

CHEN Xiang-ming  JIANG Han-liang  ZHOU Lin-fu  PAN Xiao-ping  HU Zhong-rong  LIU Rong-hua  CHEN Xiao-ming  CHEN Zhi 《Journal of Zhejiang University. Science. B》2005,6(9)

Objective: To investigate the immunological function of a yeast expression system for thymosin α1(Tα1). Methods: A constructed Tα1 yeast expression system was used to investigate the immunological function of orally administered Tα1. Dried yeast containing three different concentration of Tα1 was fed to normal Balb/c mice and other Balb/c mice whose immunities were inhibited in advance by cyclophosphamide. Synthesized Tα1 peptide was used as positive control and dried yeast with empty plasmid was used as negative control. CD4 and CD8 levels were detected by flow cytometry assay. TNF-α IFN-γ IL-2, IL-6 and IL-10 levels were detected by liquid chip. Results: In normal Balb/c mice or immune inhibition Balb/c mice, CD8 levels were significantly increased. Especially in immune inhibition Balb/c mice, CD8 levels in synthesized Tα1 group (18.77％±4.72％),small dose group (13.48％±6.17％) and large dose group (22.74％±1.09％) were significantly higher than that in empty yeast control group (7.49％±2.14％). Conclusion: Orally administered Tα1 has its certain immunomodulatory function.  相似文献   

藏书害虫衣鱼的防治     

冯大庆 《当代图书馆》2008,(4)

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。  相似文献   

通用题库数据结构与组卷算法设计   总被引：2，自引：0，他引：2  

朱守业 《现代教育技术》2008,18(8):101-104

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。  相似文献   

WEB环境下实验教学系统研究   总被引：1，自引：0，他引：1  

高桂霞  张云鹏 《现代教育技术》2008,18(12):100-103

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。  相似文献   

高职管理学基础课程实训模式     

单凤儒 《现代教育技术》2008,18(3):109-113

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。  相似文献