基于DCOR模型的新产品设计链研究

在新产品协同设计趋势的影响下,企业竞争力的来源将从优秀的供应链管理逐渐转移至有效的设计链管理.设计链运营参考模型(DCOR-model)提供了一套标准的框架,使企业可以对最难管理和控制的产品研发流程进行分析与改进.对DCOR模型的框架进行分析,探讨了进行新产品设计时自顶向下的设计链建模过程,最后构建了GPS产业设计链建模的流程.     

发动机悬置非线性刚度橡胶结构设计

为了能获得符合刚度设计要求的悬置橡胶结构,应用非线性有限元软件abaqus,通过橡胶材料的力学性能试验数据,建立橡胶材料超弹性本构模型;结合优化算法以橡胶悬置几何参数为变量,三向悬置刚度曲线为目标,完成橡胶悬置结构设计,并提出一种发动机橡胶悬置结构设计方法。     

多通道数据采集系统设计

本系统利用A/D转换器件采集三个通道的模拟信号并转换为数字信号,下位机读取数字信号并将采集次数信息连同得到的数字信号一起保存在片外存储器中。上位机读取键盘信息,如果需要显示数据,就向下位机发送请求信号,下位机再从片外存储器读取相应的数据传递给上位机,上位机则将数据送入液晶显示器进行显示。     

Managing personal human capital for professional excellence: an attempt to design a practical methodology

Within the context of the knowledge-based economy, individuals increasingly control their own development, careers and destinies, rather than the organisations that employ them. Work drawing on the new career orientations has been mostly conceptual rather than empirical. The existing literature focuses mainly on explaining the conditions under which new career orientations emerge and the changes these can bring to the lives of individuals. However, we found that there is no practical methodology to help individuals face the challenges of the future in a proactive manner. The aim of this paper is to develop a practical methodology (the PHCN – Personal Human Capital Navigator) that helps individuals to systematically manage their personal human capital so they can achieve their strategic objectives and outstanding results.     

Cloud-based big data analytics for customer insight-driven design innovation in SMEs

Fast development of IT and ICT facilitate customers to post a large volume of their concerns and expectation online, which are widely accepted to be a valuable resource for product designers. However, it is found that only a small number of small and medium-sized enterprises (SMEs) have capabilities to leverage customer online insights for design innovation, which often demonstrate a significant share in national economies growth. To discover the beneath reasons regarding the barrier that prevent them to make effective utilization, in this study, as a concrete example, manufacturing SMEs in the South Wales and Greater Manchester industrial areas of the UK are focused and their potential motivations for using and knowledge of big data-based customer analytics are investigated. An exploratory survey was conducted in terms of the type of customer data they have, the storage approaches, the volume of customer data, etc. Next, a carefully devised exploratory study was undertaken to understand how SMEs perceive the relations between customer data and product design, how about their expectations from big customer data analytics and what really challenges SMEs to exploit the value of big customer data. Besides, a demonstration platform is developed to present SMEs an automatic process of analysing customer online reviews and the capacity on customer insights acquisition and strategic decision making. Finally, findings from two focus groups indicate the different managerial and technical considerations required for SMEs considering implementing big data and customer analytics. This study encourages SMEs to welcome big customer data and suggests that a cloud-based approach may be the most appropriate way of giving access to big data analytics techniques.     

Resilient sampled-data control design for singular networked systems with random missing data

This paper proposes an active resilient control strategy for singular networked control systems with external disturbances and missing data scenario based on sampled-data scheme. To characterize the missing data scenario, a stochastic variable satisfying Bernoulli distributed white sequence is introduced. Based on this scenario, in this paper, two different models are proposed. For both the models, by using Lyapunov–Krasovskii functional approach, which fully uses the available information about the actual sampling pattern, some sufficient conditions in terms of linear matrix inequalities (LMIs) are separately obtained to guarantee that the resulting closed-loop system is admissible and strictly dissipative with a prescribed performance index. In particular, Jensen’s and Wirtinger based integral inequalities are employed to simplify the integral terms which appeared in the derivation of stabilization results. Then, if the obtained LMIs are feasible, the corresponding parameters of the designed resilient sampled-data controller are determined. Finally, two numerical examples are presented to demonstrate the effectiveness of the proposed control design technique.     

Semi-autonomous methodology to validate and update customer needs database through text data analytics

To develop highly competitive products, companies need to understand customer needs (CNs) by effectively gathering and analysing customer data. With the advances in Information Technology, customer data comes not only from surveys and focus groups but also from social media and networking sites. Few studies have focused on developing algorithms that are devised exclusively to help to understand customer needs from big opinion data. Topic mining, aspect-based sentiment analysis and word embedding are some of the techniques adopted to identify CNs from text data. However, most of them do not consider the possibility that part of the customer data analysed is already known by companies. With the aim to continuously enhance company understanding of CNs, this paper presents an autonomous methodology for automatically classifying a set of text data (customer sentences) as referring to known or unknown CN statements by the company. For verification purposes, an example regarding a set of customer answers from an open survey questionnaire regarding the climate system of a car is illustrated. Results indicate that the proposed methodology helps companies to validate and update the customer need database with an average of 90 % precision and 60 % recall.     

数据仓库及其在备件库存控制DSS中的应用

分析连续生产模式下的备件库存控制决策特点,针对现行备件库存控制决策支持系统在数据集成、历史数据方面、查询功能以及数据分析方面存在的不足,讨论数据仓库、OLAP和数据挖掘技术在备件库存控制决策支持系统上的应用,并结合XML技术和ROLAP数据模式设计的思想,设计了备件库存控制决策支持系统的体系结构和功能结构。     

用于BEPCII的数据管理系统的设计和初步实现

通过J2EE架构实现了基于Web的数据管理平台,基于Linux架构Oracle数据库管理器,实现一个端到端安全的、高性能、易操作、可扩展的通用数据平台。     

基于USB接口CT实验仪的数据采集系统设计

介绍一种采用USB（Univer salSerial Bus）接口技术的计算机断层扫描（Computer Tomography,简称CT）教学实验仪的数据采集的硬件系统设计,主要包括闪烁探测器、线性放大器、基于ADC的多道分析器和USB接口电路。     

科学映射模式及其方法论基础的探讨

 科学映射是科学计量学重要研究领域。半个世纪以来,科学计量学家和信息科学家对具体方法和技术进行了大量探索,研究成果已在信息服务实践中应用,对战略科学决策起到重要的支持作用。然而该领域的理论研究尚显薄弱。本文在科学学研究的背景框架中,提出了科学映射的双层概念含义;建构了科学本体-科学家-交流媒介的三维模式和科学论著-科学本体的简化两极模式;从认知学、社会学和交流传播学三大方法探讨科学映射的方法论架构,其中,以文献计量学作为三大方法的链索和交流传播学方法的核心。     

空间反射式闪耀光栅支撑结构设计

本文基于有限元分析方法,采用适合中、小型光学元件的周边支撑结构形式,进行了某星载温室气体探测仪大平面反射式闪耀光栅支撑结构的设计。通过对光栅组件进行有限元建模,以及固有模态、静力学、动力学、光机热集成分析,优化了支撑结构设计,使得光栅组件基频〉300Hz,在±5℃均匀温度变化和1g重力耦合作用下,光栅刻划表面波前面形精度仍符合光学设计要求。最终工程分析结果表明：大平面反射式闪耀光栅的支撑结构设计是合理的,光栅组件固有一阶频率高,抗重力变形能力、抗震性能均能满足仪器总体设计指标要求,通过选用不同热膨胀系数的结构材料及合理设计零件配合尺寸等消热设计手段有效抑制了光栅支撑结构的变形对光栅结构的扭曲作用。     

基于设计结构矩阵的项目进度计划模型研究

分析传统项目周期计算方法的局限性,提出一个基于设计结构矩阵(DSM)的项目进度计划模型。模型中充分考虑了任务的搭接关系对项目进度的影响。通过实例说明了该模型可以有效地缩短项目周期,为项目进度管理提供了新的思路。     

纯弯曲正应力实验装置结构的设计研究

纯弯曲实验装置是专为材料力学实验而设计的试验设备,文章在原有装置的基础上针对其不足之处进行结构的改进设计研究。     

浅论安防系统中的结构设计问题

从功能要求、人机要求和附加值提升三个方面,阐述了在安防系统中进行结构设计时,需要重点关注的问题,并给出了问题的答案和建议,对工程师从事相关工作具有一定的参考和借鉴作用。     

基于温湿度、风速风向传感器的气象无线模块设计

本文利用微控制器控制无线模块与传感器,实现局部区域气象数据采集与无线传送,以用于雾霾气象条件的监测.气象数据采集模块中的环境传感器由DHT11温湿度传感器、TX系列风速传感器、TF系列风向传感器组成,nRF905作为无线模块,在STC89C52的控制下实现数据采集与发送.经过实际测试,表明本文制作的气象数据采集模块可以用于雾霭气象条件监测.     

A nonsmooth Newton method for the design of state feedback stabilizers under structure constraints

The paper proposes a method for structured state-feedback controllers design for linear time-invariant systems. A necessary and sufficient condition for structured state-feedback stabilizability of linear systems, making an appeal to the linear-quadratic (LQ) regulator theory, is first proposed. The latter is presented in the form of a nonlinear matrix equation. Then, it is recast as a nonsmooth unconstrained equation using projection onto the positive semi-definite matrices cone. Thereby, a nonsmooth Newton’s iterative algorithm, based on the Clarke generalized Jacobian of said projection, is proposed. This method has a guaranteed local convergence. Finally, numerical examples illustrate the effectiveness of the proposed method.     

某自卸车车厢结构分析及改进设计

为研究某船型自卸车车厢结构,对车厢满载举升典型工况进行静力学分析,得到了车厢的变形和应力状况。针对该类车厢结构易受疲劳和强度破坏的薄弱环节提出了相应的改进方案,并对改进的车厢结构进行静力学分析。将改进前后的分析结果进行比较,结果显示通过改进局部结构有效的提高了此车厢的强度和刚度,对此类自卸车车厢结构的设计具有实用的参考意义。