一种基于实时数据流的生产线资源调度和分配方法

针对生产线资源的调度与分配难题,提出了基于实时数据流的生产线资源调度分配模型。该模型利用产品的实时生产进度信息和生产线设备的实时状态信息,结合生产线资源管理信息来进行统计分析,实现资源的合理调度分配。实际生产应用表明,基于该调度模型的生产系统能够合理地进行生产线资源的调度分配,运行稳定,安全可靠。     

一种数据块关系指导的缓存替换方法

提出了一种数据块关系指导的缓存替换方法BDP(block correlations directed replacement policy).数据块关系所表示的空间局部性可以用来指导存储系统的缓存替换策略.BDP利用历史访问信息和实时访问信息,预测数据块未来的空间局部性特征,并设计数据块驻留时间的控制策略,减少现有替换算法对空间局部性预测失败带来的失效惩罚.同时给出了BDP的有效缓存模型.模拟结果显示,对大多数实际系统工作负载,BDP的失效率相对LRU算法下降11%～38%,优于现有的考虑空间局部性的替换算法.     

基于RBF神经网络的制丝生产线仿真模型

烟草生产企业的制丝生产线是烟草生产企业最重要的环节,也是一个复杂的非线性系统,制丝生产线的好坏直接决定了卷烟质量。为了解决制丝生产线参数调节问题、提高生产质量,需要对制丝生产线进行仿真研究。现今在国内还没有对其进行过建模分析。文章结合制丝生产线的实际情况,提出了引入反馈和延时的RBF神经网络网络模型制丝生产线仿真模型,并以制丝生产线中的加料机模型进行仿真,取得了良好的效果。     

一种支持按需定制的决策工作流对象模型设计与开发

实现按需定制的个性化决策是决策支持系统发展的重要方向。针对个性化决策需要融合多种决策要素、满足不同用户不同决策思维这一核心需求,基于工作流和面向对象技术提出一种新的决策工作流模型,并对其运行逻辑和执行环境进行了总体设计。该模型通过工作流技术来构建决策流程,将每个流程节点视为决策对象,将决策所需的核心要素如数据、指标、模型、规则、图表等视为可扩展的对象属性加载到决策对象中,而后将决策工作流全流程整体提交到分布式计算环境下执行。以建设项目选址决策作为典型场景对该方法进行技术验证,实证表明,所提出的技术方法具有较强的可扩展性和灵活性,能够有效满足个性化定制的决策需求。     

一种软件过程质量的度量方法

提出了一种软件过程质量度量的流程,建立了一个以生命周期为基础的软件过程质量度量模型,将软件过程质量要素分解成了共性软件过程质量要素和个性软件过程质量要素两大类,分析了相应的质量要素、质量子要素和度量元,给出了相应的度量方法。最后利用该度量方法对某公司5个软件项目需求阶段的过程质量及软件开发后期需求稳定性因子进行了度量,经数据分析发现软件开发后期的需求稳定性因子与需求阶段的过程质量是正相关的,从而表明了提出的度量方法和度量模型是有效的。     

数据驱动下的半导体生产线动态调度方法

本文研究了一种数据驱动下的半导体生产线调度框架,该框架基于调度优化数据样本,应用机器学习算法,获得动态调度模型,通过该模型,对于半导体生产线,能够根据其当前的生产状态,实时地定出近似最优的调度策略.在此基础上,利用特征选择和分类算法,提出一种生成动态调度模型的方法,并且具体实现出一种混合式特征选择和分类算法的调度模型:先采用过滤式特征选择方法对生产属性进行初步筛选,然后再采用封装式特征选择和分类方法生成模型以提高模型生成的效率.最后,在某实际半导体生产线上,对在所提出的框架上采用6种不同算法实现的动态调度模型进行测试,并对算法性能数据和生产线性能据进行对比和分析.结果表明,数据驱动下的动态调度方法优于单一的调度规则,同时也能满足生产线调度实时性要求.在数据样本较多的情况下,建议采用本文所提出的方法.     

基于B/S的企业数据采集系统设计与实现

通过对C/S结构与B/S结构进行比较,为采集系统的软件复用和快速开发提供了体系结构上的支持.随后根据企业对生产线上产品信息的应用需求提出了基于B/S的实时数据采集系统的设计方案,最后对关键技术的实现进行了详细的介绍.目前此系统在企业运行效果良好,成功地解决了管理层和生产现场的数据同步问题,使企业管理层可以根据生产线的具体情况及时做出决策.     

大数据结构化与数据驱动的复杂系统维修决策

现代大型机电系统组成结构越来越复杂、智能化程度越来越高, 然而系统维修工作却越来越困难; 另外, 尽管快速发展的信息技术使得系统内部的各种流数据得到了有效的保存, 但却缺乏对这类大数据的有效利用、实现复杂系统的维修控制与决策.为此, 提出了大数据结构化与数据驱动的复杂系统维修决策方法.大数据结构化使用了层次分析法(Analytic hierarchy process, AHP)的思想, 依次建立系统维修的各个层级模型; 基于模型抽象出支持系统维修的数据变量、提炼出各层级变量的表达函数; 研究进一步实现了维护决策的数据驱动技术, 在模型和函数之上定义了数据状态块矩阵, 通过设计矩阵的特殊运算算法完成维修决策的数据驱动.最后, 使用一个具体的例子来说明提出方法的可用性, 结果证明提出的方法是可行的, 符合设备维修决策建设目标, 即维修方法经济、高效与实用.     

政务领域软件生产线研究

基于Trustie的软件生产线体系和方法,对电子政务领域软件生产线进行了研究;并在一些电子政务行业产品研发项目中进行应用实践,对使用了软件生产线的项目进行了项目进度、成本、质量等方面的调查;采用统计模型分析相关数据,发现使用软件生产线能够有效提升企业软件生产水平,具有推广价值。     

基于B／S模式产品数据采集系统的设计与开发

根据企业对生产线上产品信息的应用需求，论述了一种基于B／S模式的实时数据采集系统的设计方案，并对此系统的体系结构、系统集成平台和网络安全技术进行了研究和设计。通过研究，此系统可以成功的解决管理层和生产现场的数据同步问题，使企业管理层可以根据生产线的具体情况及时的做出决策，为企业进一步加强管理，提高工作效率，增强企业整体竞争力，发挥了重要的作用。     

Evidence-based recommendations for building better bras for women treated for breast cancer

Participating in exercise is beneficial for women who have been treated for breast cancer. However, not being able to find a comfortable exercise bra can be a barrier to exercise participation. This study aimed to systematically investigate what breast support women treated for breast cancer want when they exercise in order to provide evidence-based recommendations to improve exercise bra designs for these women. Based on 432 responses from a national online survey, frequency and relationship data were analysed (binary logistic regression) to understand exercise bra issues pertinent to this population. These issues included being able to control for asymmetrical cup sizes, managing heightened skin sensitivity, managing fluid (size) fluctuations, managing a prosthesis and restoring body image by restoring shape. This study provides evidence-based recommendations to inform an exercise bra design that will meet the unique needs of women treated for breast cancer. Rigorous, evidence-based evaluations of exercise bras for women treated for breast cancer may contribute to their well-being and quality of life through enhanced designs.     

一种SIP穿越NAT的解决方案

NAT使得SIP端到端的应用变得非常困难,文章分析了几种SIP穿越NAT方法及其不足,提出了一种基于STUN和TURN方法的穿越方案.其基本思想是根据NAT的不同采用不同的方式实现SIP信令的穿越,而媒体流的穿越则通过对所有可用媒体地址进行连接检查来实现.方案不改动现有NAT,在应用层上实现了对所有NAT的有效穿越,避免单独使用其它方法带来的缺陷.     

Grammar engineering for multiple front-ends for Python

In this paper, we describe our experience in grammar engineering to construct multiple parsers and front ends for the Python language. We present a metrics-based study of the evolution of the Python grammars through the multiple versions of the language in an effort to distinguish and measure grammar evolution and to provide a basis of comparison with related research in grammar engineering. To conduct this research, we have built a toolkit, pygrat , which builds on tools developed in other research. We use pygrat to build a system that automates much of the process needed to translate the Python grammars from EBNF to a formalism acceptable to the bison parser generator. We exploit the suite of Python test cases, used by the Python developers, to validate our parser generation. Finally, we describe our use of the menhir parser generator to facilitate the parser and front-end construction, eliminating some of the transformations and providing practical support for grammar modularisation.     

医院多功能情报监控系统的研究

介绍了基于AT89S52单片机设计的医院多功能情报监控系统,该系统分为监测端和控制端2个部分.监测端位于病房内,和控制端通过CAN总线进行通讯,传递病房内的环境参数以及室内环境调节装置的控制信息.控制端位于控制室内,通过RS232与上位机通信,可以使用计算机上的C语言编译的人机对话界面,对各个病房的环境进行实时监测调节.     

Regional Process Modeling for Design for Environment

This research is an effort towards providing higher level Design for Environment (DFE) tools for a broad industrial region. Issues ranging from the levels immediately above existing design tools, to the envisioned highest level for a broad geographical region are discussed. A tool for the regional planning of the DFE activities is proposed, considering a model construction based on material flows across the industry. The Multi-Lifecycle approach is supported by organizing the input/output flows for industries, potentially utilizing waste material, side products and recycling. Capitalizing on the conceptual integration of the design and process activities, an Abstract Design Environment is used for the design of the basically process oriented material flow tool. Within the context, the relations among design, process and flow-modeling concepts are discussed.     

Louvers design for LED displays for sunny days

The use of louvers attached to variable information display needs to be optimized taking into account different intrinsic and extrinsic parameters. The analysis of the performance of the display–louvers system takes into account the location, orientation, and daily and seasonal variations. The observation of the system is divided depending on the distance of observation. The far distance vision performance use the background luminance. The medium distance performance needs the use of the Contrast Sensitivity Function of the eye.     

Design for All in multimedia guides for museums

The Design for All principles define the characteristics which a device should possess in order for it be utilised by every type of user, independent of his or her sensory disabilities or technological competency. These principles are realised in the current work as an integrative tool with which to facilitate universal access to museums via multimedia and portable guides, making access available to all. Based on these principles, this article describes the main findings of the design and use of the MGA (Multimedia Guides for All) approach proposed in this paper. This approach involves a series of recommendations for the selection, application, preparation of content, and maintenance of this type of computerized device, in order to achieve these principles. Firstly, a comparative analysis of the principal types of electronic guides available in museums which incorporate accessibility criteria is provided. Subsequently, a real case study case is presented which conforms to the MGA approach. The MGA approach can be applied to other domains, which should be explored in further research. The conclusions in this article have been drawn from two R&D projects financed by the Spanish Ministry of Industry, Science and Technology supported by the EC FEDER R&D Program.     

学以致用创新发展

<正>ADI公司2007大学生创新设计竞赛颁奖典礼暨媒体见面会侧记高性能模拟集成电路制造商ADI公司于2007年11月6日在北京工业大学(BJUT)举办"2007年度ADI大学生创新设计人赛"