ERG’s plan for success

Gemplus and SchlumbergerSema make more smart cards than anyone else. But ERG from Western Australia is bidding to take a place alongside the two European leaders as one of the world’s major providers of smart card-based systems.     

Transmo acquisition crowns a busy year for ERG

The acquisition by ERG of the UK's Transmo crowns a busy year for the Australian systems house. During 1999, Perth-based ERG has secured a raft of new contracts for mass transit systems – ranging from San Franciso to Berlin – many of them in partnership with Motorola. Through this latest acquisition, ERG has secured Transmo's Citycard technology, which is used for concessionary fare travel on buses in several UK counties. Citycard can now be integrated in the UK with the Prepayment Cards (PCL) business (jointly owned by ERG, Stagecoach and Sema) to deliver a co-ordinated smart card system for mass transit and city purse schemes.     

等价关系矩阵的置换合同性质与标准形计算

等价关系在网络分析、图论、模式识别和数据库技术等方面都有许多应用,而任意等价关系矩阵都置换合同于块1-对角矩阵标准形,从置换运算的角度分析置换合同的几条性质,提出基于图的深度优先搜索策略的置换矩阵构造算法：根据等价矩阵关系图搜索路径的性质,将图的深度优先搜索所得顶点路径与初始顶点顺序对比构造置换映射。利用置换分解原理,将置换映射分解成相应的对换乘积,得到最终置换矩阵,完成等价关系矩阵的置换相似判定。为了验证该算法的正确性和效率,设计了一个等价关系矩阵的自动生成算法。实验结果表明,置换矩阵构造算法和等价关系矩阵的自动生成算法简洁且易于理解和实现。     

论洛可可建筑装饰对洛可可服饰的影响

探讨洛可可时期建筑装饰对同时期的洛可可服饰产生的影响。分析洛可可服饰在洛可可建筑装饰的整体造型、色彩搭配、装饰效果等方面的相互追随和借鉴,指出其在服饰史上的重要地位,及对现代服饰设计发展的引导意义。     

一种快速提取弹底底火部分图像方法

枪弹弹底底火部分检测是枪弹质量控制的核心,为了快速准确地分割枪弹弹底底火部分图像,提出一种新的分割方法。该方法针对弹底检测要求及弹底图像为同心圆环的基本特征,首先对弹底图像运用Canny算子边缘检测到的二值图像进行区域填充,再进行边缘检测得弹底边缘轮廓,然后利用直径过圆心原理确定弹底圆心,利用底火圆对应的半径对弹底灰度图像赋值提取底火部分图像。实验表明,此方法能够快速准确地提取弹底底火部分图像。     

儿童书籍设计趣味性研究

童书设计者应该处处为我们的小读者考虑,在进行童书设计时,多关注他们的特点和兴趣点,其中最重要的就是突出童书设计的趣味性。儿童书籍设计中的趣味性能够在潜移默化中激发孩子的想象力、创造力,并能够陶冶他们的性情。     

儿童家具设计

社会的进步,儿童生活层次的提高,需要我们为孩子们营造一个全方位的理想生活空间。本文主要从卧室儿童家具、户外公共儿童家具、低龄学生学校家具这三个方面出发,分析了儿童家具的设计。旨在阐述儿童家具的设计方法,唤起社会各界对儿童家具设计的关注。     

女书图案设计与瑶族图案的联系

女书图案是由流传于中国湖南省江永县的女书的艺术转形而得来。女书图案设计与瑶族图案的联系,主要体现在女书字形与瑶族图案造型的神似之处;体现于女书图案设计创意过程中穿插与借用瑶族图案的构成元素及其用色规律,进而融入时尚,设计出有民族特色的女书图案。     

起重机吊重系统状态观测器设计与仿真

针对工程实际中起重机吊重摆角和摆角角速度不易直接测量的问题,利用小车位置信息设计了状态观测器,对吊重摆角和摆角角速度信息进行估计。通过引入观测器输出与小车吊重系统输出之间的差值并经过观测器的增益向量调节送至观测器的输入端,合理配置观测器的极点,实现观测器对摆角和摆角角速度稳定、快速估计。仿真研究表明:基于状态估计的吊重摆角信息获取方法可行,观测器能在2s内实现在线观测,而且具有较强的鲁棒性;随着极点的增大,观测器对吊重和绳长的变化具有更宽的适应范围,但极点过大时,估计误差会出现上冲或下冲的现象;观测器对绳长的变化始终比对吊重的变化更敏感。     

汽车发展对现代生活方式的影响

随着2008年中国汽车产销量突破1000万辆,汽车在中国老百姓中的影响越来越大。汽车作为科技、社会、设计、时尚、潮流发展的综合体,其反映了一个民族的生存状态和生活方式以及社会进步。人们生活水平的提高促进了汽车的发展,而汽车的发展又会反过来影响原有的传统生活方式和传统文化——汽车让传统生活更加便捷;让家的舒适得以延伸;让时尚包裹着我们周边的每一个角落,让我们更加懂得在工作之余去享受生活。     

Ludwig Föppl: A Bavarian cryptanalyst on the Western front

Germany’s codebreaking efforts during World War I remain largely unrecorded. Previous analysis of the Bavarian Sixth Army’s efforts to decipher Royal Navy ciphers revealed the central role played by Ludwig Föppl, who subsequently became one of Germany’s leading academics. Drawing on Föppl’s unpublished memoirs, this article explores his experience in the war, including a detailed account of how he cracked two Allied ciphers and codes. The article also provides the first account of Föppl’s service in World War II. Föppl’s service is used to explore the German Army’s attitude to civilian experts and is contrasted with British practice.     

火焰温度场测试中的传感器动态响应研究

在诸如爆炸火焰温度场的瞬态测试中,传感器的动态响应特性是影响测试结果的重要指标,而温度传感器热电偶的动态响应特性通常通过时间常数来反映。针对这种特殊测温环境下对热电偶时间常数的标定要求,采用火焰温度源法,对OMEGA生产的热电偶的时间常数进行了标定分析,获得其时间常数为846.992 ms,标定系统的动态重复性为1.17%。结果表明,用此标定方法得到的时间常数能更真实地反映热电偶在火焰温度场中的动态响应性能,且标定系统的动态重复性好,测试精度高,对分析弹药爆炸过程中的热毁伤效应有一定的参考价值。     

设计引导人的行为

在现如今工业文明的时代,设计活动在引导人的行为方式上发挥着越来越重要的作用。本文以日常生活的实例为出发点,从设计引导人的积极行为、设计克服人的不良行为以及设计引导人的创新行为等方面进行探究和分析,来探寻设计活动是如何潜移默化地引导和改变人的行为方式的。     

浅谈可成长性儿童家具设计

针对目前儿童家具市场存在的问题,本文详细阐述了可成长性儿童家具的必要性、含义和特点,并提出了可成长性儿童家具的设计原则,为国内儿童家具设计提供一些有益的参考。     

What difference does the gig mobility service make in the workers’ human needs structure?

This paper aims to compare and contrast the perceived psychological experience of the traditional versus gig mobility service workers with respect to their human needs structure. Gig mobility service here refers to on-demand transportation service enabled by an online platform. Both qualitative and quantitative research methods were used. Using the perspective of ERG (Existence, Relatedness and Growth) theory, we first explored the field using in-depth interviews and observations of both worker groups. Based on the qualitative findings, we formulated the quantitative measures for the corresponding constructs. The constructs’ relationship and paths differences between the two groups were analyzed statistically using partial least square path modeling (PLS-PM) method. The differences between the two groups were categorized into four quadrants, highlighting what both groups have and do not have, as well as what one group has but not the other. It was found that the gig mobility service resulted in not only more relationships among the constructs, but also generally higher perceived well-being for the workers. It seems that the gig mobility service has so far been promising in meeting workers human needs despite its long-term uncertainty. This study is among the few studies on understanding in which way the technology has changed the mobility service actors seen as workers, rather than sellers or users.     

浅析城市标识导向系统的趣味性

本文从一个新的角度来探讨城市标识导向系统的设计,趣味性作为标识导向系统的一个显著的特征,受到人们的广泛关注,标识导向系统的识别性与规范性是趣味性的基础,趣味性是有益的补充,文中详细阐述了趣味性表达的方法。又对趣味性标识导向的使用提出了适用的范围。     

Braess’s Paradox for Flows over Time

We study the properties of Braess’s paradox in the context of the model of congestion games with flow over time introduced by Koch and Skutella. We compare them to the well known properties of Braess’s paradox for Wardrop’s model of games with static flows. We show that there are networks which do not admit Braess’s paradox in Wardrop’s model, but which admit it in the model with flow over time. Moreover, there is a topology that admits a much more severe Braess’s ratio for this model. Further, despite its symmetry for games with static flow, we show that Braess’s paradox is not symmetric for flows over time. We illustrate that there are network topologies which exhibit Braess’s paradox, but for which the transpose does not. Finally, we conjecture a necessary and sufficient condition of existence of Braess’s paradox in a network, and prove the condition of existence of the paradox either in the network or in its transpose.     

Joint user knowledge and matrix factorization for recommender systems

Currently, most of the existing recommendation methods treat social network users equally, which assume that the effect of recommendation on a user is decided by the user’s own preferences and social influence. However, a user’s own knowledge in a field has not been considered. In other words, to what extent does a user accept recommendations in social networks need to consider the user’s own knowledge or expertise in the field. In this paper, we propose a novel matrix factorization recommendation algorithm based on integrating social network information such as trust relationships, rating information of users and users’ own knowledge. Specifically, since we cannot directly measure a user’s knowledge in the field, we first use a user’s status in a social network to indicate a user’s knowledge in a field, and users’ status is inferred from the distributions of users’ ratings and followers across fields or the structure of domain-specific social network. Then, we model the final rating of decision-making as a linear combination of the user’s own preferences, social influence and user’s own knowledge. Experimental results on real world data sets show that our proposed approach generally outperforms the state-of-the-art recommendation algorithms that do not consider the knowledge level difference between the users.     

一个适应性安全的支持用户私钥撤销的KP-ABE方案

用户私钥撤销是基于属性的加密(Attribute Based Encryption,ABE)方案在实际应用中所必需解决的问题.现有的支持用户私钥撤销的ABE方案通过引入用户身份的概念,以撤销用户身份的方式实现了对用户私钥的撤销,但其安全性只能达到选择性安全.本文借鉴已有方案的思想,通过将Lewko等人提出的适应性安全ABE方案与Leyou Zhang提出的适应性安全基于身份的组播加密方案相结合,利用双系统加密技术,在合数阶双线性群上实现了一个适应性安全的支持对用户私钥进行撤销的KP-ABE方案.     

色彩在医院景观设计中的应用

医院是一类特殊的场域,随着社会的发展。人们生活水平的不断提高和医学模式向生理,心理等方面的转变.人们对医疗环境的要求越来越高,营建人性化的医院户外空间景观环境具有重大的意义.而色彩作为一种视觉元素.在建筑环境中的使用也发挥着很重要的作用。研究医院景观设计中色彩的应用是社会进步和新的医学模式需要。本文从色彩的功能着手,通过对医院景观色彩的理论基础,医院景观中色彩对人生理与心理所产生的作用以及结合的实例,研究色彩在医院景观设计中的实际应用效果,期翼在我国医院环境色彩这部分有新的拓展。