基于LabVIEW和MATLAB的温度采集分析系统的研究

根据电弧炉冶炼中温度分析的实际工况需要,本文作者以LabVIEW6.1为开发平台,结合MATLAB强大的绘图功能开发研究了一种温度采集分析系统.系统对串口采集的温度数据构建数据库,通过良好的人机交互界面实现对数据库的查询,并通过绘制历史曲线、二维温度分布及三维温度分布场,对温度数据进行分析.     

n-度中心度与k-压力中心度及其并行算法

网络中心度是网络分析的重要指标。文章提出n-度中心度和k-压力中心度以补充网络中心度的研究，此外，并行算法能提高大规模网络的计算效率。为此，在设计网络中心度并行工具包的同时，设计并实现n-度中心度和k-压力中心度的并行算法。工具包的设计基于Spark框架的Pregel方法，并通过BoardEx社交网络测试性能。实验证明工具包的可行性与可拓展性。     

Managerial ambidexterity and the cultural toolkit in project delivery

Research has established that ambidextrous organizations can successfully outperform their non-ambidextrous counterparts through exploitative and exploratory activities. However, there remains a scarcity of research on how managers orchestrate ambidexterity at the operational level, particularly in project delivery. Drawing on 55 qualitative interviews with middle managers on two engineering projects, we examine how managerial ambidexterity is enacted at the project level. We find that middle managers enable their own exploitative, exploratory and ambidextrous behaviors by invoking a repertoire of values selected from their organization's cultural toolkit, which serve as cultural resources for action. We discuss how the cultural toolkit perspective can inform the relationship between managerial actions in day-to-day operations and organizational ambidexterity. Implications for theory and practice are presented.     

一种航控板故障检测系统的设计与实现

针对传统的采用万用表检测航控板故障存在种种弊端,设计了一种基于虚拟仪器技术、LabVIEW的软件平台的航控板的故障检测系统。本系统采用M的PXI板卡,采用状态机的设计思想编制了主程序,程序构架由上向下,分层编制。并利用数据库、LabSQL等方法实现了引脚连接查询、数据分析。人机界面可实现结果动态刷新显示、存储及打印测量结果。实现了航控板故障检测自动化、可视化。应用表明,本系统可快速检测出航控板的故障点,检测结果准确、可靠,具有较广泛的应用前景。     

数据采集系统中的LabVIEW数据库访问技术

介绍了在LabVIEW编程环境下利用LabSQL访问Microsoft Access数据库的方法,解决了LabVIEW中数据库操作的问题。详细阐述了如何实现数据库的连接及表格的创建,数据的实时录入和查询显示,并将该技术成功地应用于多通道数据采集系统中,取得了较好的效果。     

CPCI分机快速设计模块的开发

从军工电子产品CPCI分机结构出发,分析了影响设计质量和效率的因素.根据模块功能需求特点,阐述了模块的总体构架及关键技术.着重研究了基于Pro/toolkit的开发技术,借助于Pro/Intralink和 Visual C++6.0完成了CPCI分机快速设计模块的开发.     

浅析远程监测系统中的数据传输与数据管理

介绍由NI公司LabVIEW编程的基于TCP/IP协议的远程监测系统的数据传输,利用SQL-SERVER对上传的数据进行管理,简单介绍了LabVIEW与数据库之间的连接工具——LabSQL。     

Tuning of NMPC controllers via multi-objective optimisation

Nonlinear Model Predictive Control (NMPC) is a powerful technique that can be used to control many industrial processes. Different and often conflicting control objectives, e.g., reference tracking, disturbance rejection and minimum control effort, are typically present. Most often these objectives are translated into a single weighted sum (WS) objective function. This approach is widespread because it is easy to use and understand. However, selecting an appropriate set of weights for the objective function is often non-trivial and is mainly done by trial and error. The current study proposes a systematic procedure for tuning Nonlinear MPC based on multi-objective optimisation methods. Advanced methods allow an efficient solution of the multi-objective problem providing a systematic overview of the controller behaviour. Moreover, through analytic relations it is possible to link a solution obtained with these novel methods to a set of weights for a weighted sum objective function. Applying this set of weights causes the WS to generate the same solution as obtained with the advanced method. Hence, an appropriate controller can be selected based on the alternatives generated by the advanced method, while the corresponding weights for a WS can be derived for implementing the controller in practice. The procedure is successfully tested on two benchmark applications: the Van de Vusse reactor and the Tennessee Eastman plant.     

The Story of the GeoToolKit—An Object-Oriented Geodatabase Kernel System

The quickly increasing number of spatio-temporal applications in fields like environmental monitoring, geology and mobile communication is a new challenge to the development of geodatabases. However, the query functionality of today's geo-information systems is still limited to the thematic attributes of spatial objects and to spatial 2-D objects. This article reports on GeoToolKit, an object-oriented geo-database kernel system developed at Bonn University to support 3-D/4-D geological applications. GeoToolKit is not a GIS-in-a-box package, but rather a library of C ++ classes that allows the incorporation of spatio-temporal functionality within an application. Being a component toolkit, it encourages the development and deployment of re-usable and open software. The history, concepts and implementation of GeoToolKit are discussed in detail. Performance tests underline the practicability of the concepts. Extensions to and experiences with GeoToolKit applications like GeoStore, GeoWeb and WellStore are presented. Finally, we give an outlook on our future research introducing GeoToolKit as a 3-D/4-D database component within a network of distributed and mobile geo-information services.