基于LSA和pLSA的多文档自动文摘

本文提出一种基于LSA和pLSA的多文档自动文摘策略。首先,将多个文档切分成自然段,以自然段作为聚类单位。采用了新的特征提取方法构建词-自然段矩阵,利用LSA对词-自然段矩阵进行奇异值分解,使得向量空间模型中的高维表示变成在潜在语义空间中的低维表示。然后,采用pLSA将数据转换成概率统计模型来计算。在文摘生成的过程中采用基于质心的文摘句挑选办法得到文摘并输出。实验表明,本文提出的方法有效地提高了生成文摘的质量。     

梦中的香格里拉——平面设计中的自由表现

自由表现——跟随着设计的发展、设计运动的兴起而一起兴衰成败,但从未离开过设计舞台,在当今的设计中更是发挥了它的重要作用和独特的魅力。自由表现在传达功能以及审美价值两方面都发挥着其卓越的功效,自由表现手法形式多样,千变万化,其创造出的视觉效果也是无穷尽的。他宛如空气一般无形地渗透到设计的各个领域,给设计带来生命和活力。惟有自由,才能容纳一切未来的生命!     

大气湍流图像像素偏差机理分析

对大气湍流导致图像畸变和像素偏差的因素进行了深入分析,对大气湍流状态下激光发射远距离光束的光束漂移均方值进行仿真,分析光束漂移均方值曲线,为后续对图像畸变、像素偏差校正及克服湍流影响提供有效的理论依据。     

传统艺术价值之体现——试析凡高的绘画艺术

早期现代主义艺术是在对传统艺术的叛离,革新的基础上发展起来的,没有传统的积淀,创新和叛离就没有办法真正实现,所以在这个时期的艺术家就面临着如何看待传统的艺术价值,如何依照自己的艺术观念进行取舍,如何继承传统的问题。凡高是西方早期现代主义艺术中的代表画家,在他的艺术风格的形成发展过程中,传统对其绘画创作的影响是十分强大而深远的,体现在他各个时期的艺术作品和观念之中。至今仍具有现实意义。     

改进的粒子群算法

针对基本粒子群算法容易陷入局部最优点,进化后期速度慢等缺点,设计了一种新的粒子群算法,将基本粒子群算法粒子行为基于个体极值点转化为个体自身极值与其他某一个个体极值的加权平均值,而全局极值点转化为群体中优秀个体极值的加权平均值。数值仿真实验表明,新算法比PSO具有更好的收敛性,能更快地找到问题的最优解。     

基于奇异值分解的机器人工具坐标系标定

机器人通过在末端安装不同的操作工具来完成各种作业任务,而工具参数的准确度直接影响着机器人操作精度,因此研究一种准确、快速的工具坐标系标定方法具有重要的意义。该文提出一种称为三点五步法的机器人工具坐标系标定方法,并基于矩阵的奇异值分解理论对该标定方法进行了严密的数学推理,证明该标定方法理论上的可行性。采用该算法进行工具坐标系标定具有操作简单、标定精度高、可靠性强和算法易于程序实现的特点。     

数值协处理器微码电路的分析与检测

主要讨论用于完成数值协处理器各种运算的微码电路。简单介绍微码电路在协处理器中的重要性,具体介绍微程序控制模块的工作原理,微码电路的微码地址产生、微程序和微子程序的调用、四阈值微码的译码及微码电路的检测电路。     

Economic modeling of board test strategies

A long and deep recession, coupled with continuous competitive pressure to reduce costs, is forcing many companies to review their test strategies. Testing costs have become a more significant proportion of the overall manufacturing cost even though manufacturing yields have increased dramatically over the past ten or twelve years. This causes attention to be focused on testing costs as a key source of cost reduction. The increased use of DFT and the integration of design and test are very positive moves towards controlling testing costs but other methods employed can often backfire. The increased use of low priced testers is one such method. The pressure to reduce costs, higher process yields and exhortations that testing adds no value can lead the test engineering manager to take the cheap route. In reality this can often turn out to be an expensive decision. The only way to avoid expensive mistakes is to perform an economic analysis of the alternative courses of action. In most cases this is done, but not always in the right manner or with the necessary amount of detail to make the comparisons meaningful. This article discusses the need for effective cost analysis of test strategies and highlights some of the pitfalls.     

Disciplined autonomy: How business analytics complements customer involvement for digital innovation

The rise of big data and the fluid boundaries of digital products are driving companies to use business analytics (BA) to power their customer involvement. The complementarity view offers unique competence to generate value from BA because capability complementarity is less likely to be replicated or imitated. Unlike prior studies on BA-enabled value realization, our research investigates the interactions of BA and customer involvement capabilities using the complementarity view. We tested our model using data collected from 317 IT companies in China. Our results suggest that BA value realization requires both a top-down mechanism in which BA skills provide global guidance for alignment with a company’s goals and a bottom-up mechanism in which BA culture empowers local autonomy for adaptation to ever-changing needs. Our BA-complemented mechanisms provide research and practice with a way to concurrently use BA and customer involvement capabilities to address the duality of digital innovation. We further suggest that BA skills are necessary but insufficient for digital innovation because BA culture demonstrates a stronger effect in complementing organizations’ existing capabilities than BA skills do.     

Exploring the value of purchasing online game items

The aims of this paper are to: (1) modify the theory of consumption values in order to investigate online game users’ perceived value of purchasable game items, and (2) develop a new construct – the “integrated value of purchasing game items” – based on the modified theory of consumption values. We found that the enjoyment, character competency, visual authority, and monetary values are appropriate for describing how online game users perceive the value of game items. Utilizing second order analysis, the “integrated value of purchasing game items” was developed. To show the validity of the new construct, we developed a research model and tested it using the results of 327 valid questionnaires. Results revealed that the new construct is statistically significant in affecting users’ intention to purchase game items.