基于时域Neal-Smith准则的人机控制系统设计多目标优化研究

为了获得驾驶员和飞机良好的匹配特性,使用基于人机闭环参考模型的方法将飞行品质的要求引入优化算法,进行飞行控制系统设计。首先使用CAP准则建立飞机等效系统模型。然后,基于时域Neal-Smith准则,通过多目标优化算法一次性得到在不同任务条件下的最优驾驶员模型。根据需要选择相应的驾驶员模型,并与飞机等效系统模型组成人机闭环参考模型,进行飞行控制设计多目标优化。仿真结果显示,文中的算法不仅可以整定控制器参数,根据任务需求选取最优驾驶员模型,还可以利用优化结果进行PIO易感性的分析。     

Satisfying quality requirements in the design of a partition‐based,distributed stock trading system

Although quality requirements (QRs) have become a major drive in today's software development, there have been very few real‐world examples in the literature that demonstrate how to meet these requirements. This paper presents such an example. Specifically, the paper describes the design of a partition‐based distributed stock trading service system that satisfies a set of QRs related to resource utilization, performance, scalability and availability. The paper evaluates this design through detailed experiments and discusses some design alternatives and the lessons learned. Central to this design are a static load distribution strategy and a dynamic load balancing strategy. The first strategy is to achieve an initial balanced workload on the system's server cluster during the system initialization time, whereas the second strategy is to maintain this balanced workload throughout the system execution time. Together, these two strategies work in unison to ensure that the server resources are efficiently utilized; the user requests are processed with the required speed; the application is partitioned with sufficient room to scale; and the system is highly available. Copyright © 2011 John Wiley & Sons, Ltd.     

Effective user involvement in product development by improving the analysis of user needs

User involvement has been shown to be beneficial in the development of useful and usable systems. The trend of software development becoming a product-oriented activity creates challenges to user involvement. Field studies appear a promising approach, but the analysis of the gathered user needs has been shown to be demanding. This study presents, on the basis of seven case studies, an early user-involvement process showing how user needs can be analysed and how the input to product development can be identified. In addition, the process is evaluated in two industrial cases with interviews and a questionnaire. The results show that the process supports effective early user involvement; the resulted requirements were evaluated as being more successful and their quality as better than average in a company. However, the case studies show that user involvement not only provides useful information about users' needs but also increases the understanding of users' values.     

A trace metamodel proposal based on the model driven architecture framework for the traceability of user requirements in data warehouses

The complexity of the data warehouse (DW) development process requires to follow a methodological approach in order to be successful. A widely accepted approach for this development is the hybrid one, in which requirements and data sources must be accommodated to a new DW model. The main problem is that we lose the relationships between requirements, elements in the multidimensional (MD) conceptual models and data sources in the process, since no traceability is explicitly specified. Therefore, this hurts requirements validation capability and increases the complexity of Extraction, Transformation and Loading processes. In this paper, we propose a novel trace metamodel for DWs and focus on the relationships between requirements and MD conceptual models. We propose a set of Query/View/Transformation rules to include traceability in DWs in an automatic way, allowing us to obtain a MD conceptual model of the DW, as well as a trace model. Therefore, we are able to trace every requirement to the MD elements, further increasing user satisfaction. Finally, we show the implementation in our Lucentia BI tool.     

A review of: “Introduction A La Psychophysiologie Du Travail (Introduction to the Psychophysiology of Work)”, by ROBERT FLORU and JEAN-CLAUDE CNOCKAERT,Presses Universitaires De Nancy (1991). pp. vi + 233, FF 120, ISBN 2-86480-550-2.

Workers in physically demanding occupations (PDOs) are frequently subjected to physical selection tests. To avoid legal ramifications, workplaces must be able to show that any personnel selection procedures reflect the inherent requirements of the job. A job task analysis (JTA) is fundamental in determining the work tasks required for employees. To date, there are no published instructions guiding PDO researchers on how to conduct job task analyses. Job task analysis research for non-PDOs offers some insight into the expected reliability and validity of data obtained on the most prevalent task domains in job analysis (importance, frequency, time spent and difficulty). This review critiques such research, and the existing published material on JTA of PDOs, and provides recommendations for future research and practice.

Practitioner Summary: There are no published guidelines for physically demanding occupation (PDO) researchers conducting job task analysis (JTA). Given the legal consequences of improperly conducted JTA, scientifically valid instructions for JTA practitioners are required. This review critiques existing research which analyses reliabilities of JTA data, and provides guidelines for PDO researchers conducting JTA.     

售楼管理系统的分析与设计

随着产业的不断发展,将楼盘的销售推向"无纸化"已成为当地房地产售楼管理的当务之急,本文在需求分析的基础上确定了系统的四大功能模块,即房产管理模块、客户管理模块、收费管理模块、售楼管理模块.从而满足了对售楼信息管理的需求.     

强电类高职人才培养模式实践与探索

为了进一步提高高职高专院校强电类毕业生的就业质量,提出一种"校企结合、工学交替、双证融通"的人才培养模式。通过筛选合适企业,强化学校与企业的合作广度和深度,以双证融通构建课程内容,采用"实践—理论—再实践"的工学交替方式,提高学生的综合素质和技术水平。     

ERP教学系统之再生法MRP的系统分析与设计

在分析现有企业资源规划（Enterprise Resource planning，ERP）商用软件和国内少数ERP教学软件在高校ERP制造人才培养所具缺陷的基础上，依ERP制造系统原理最新教改成果，介绍单机版ERP教学软件中核心的再生法物料需求计划（Material Resource planning MRP）的模拟开发。在较简单静态材料表基础上，详细阐述集成冲销时间、逾期量及固定计划订单等因素的再生法MRP的系统分析与设计。该模拟开发巳能基本满足MRP核心,计划原理的教学需求，为后续动态材料表与重排计划建议等MRP高级功能的实现打下坚实基础。     

环保型电力电缆塑料保护管的研制

随着城市电力电缆入地改造工程的不断推进,防止地下水重金属污染问题已成为环境关注重点,具有环保性能的电力电缆塑料保护管的研制开发尤显迫切。文章就环保型电力电缆塑料保护管的定义与技术要求;产品配方、生产工艺、成型设备等诸环节如何确保环保标准要求以及相关检验项目、性能参数作了说明。该产品已达到国际同类产品先进水平。