Characterizing image quality of autostereoscopic displays by using the maximum luminance at each viewing position

A metric of the 3D image quality of autostereoscopic displays based on optical measurements is proposed. This metric uses each view's luminance contrast, which is defined as the ratio of maximum luminance at each viewing position to total luminance at that position. Conventional metrics of the autostereoscopic display based on crosstalk, which uses “wanted” and “unwanted” lights. However, in case of the multiple‐views‐type autostereoscopic displays, it is difficult to distinguish exactly which lights are wanted lights and which are unwanted lights. This paper assumes that the wanted light has a maximum luminance at the good stereoscopic viewing position, and the unwanted light also has a maximum luminance at the worst pseudo‐stereoscopic viewing position. By using the maximum luminance that is indexed by view number of the autostereoscopic display, the proposed method enables characterizing stereoscopic viewing conditions without using wanted/unwanted light. A 3D image quality metric called “stereo luminance contrast,” the average of both eyes' contrast, is proposed. The effectiveness of the proposed metric is confirmed by the results of optical measurement analyses of different types of autostereoscopic displays, such as the two‐view, scan‐backlight, multi‐view, and integral.     

Information systems use as strategy practice: A multi-dimensional view of strategic information system implementation and use

Information systems (IS) are strategic in so far as they are used to realize strategic intent. Yet, while much has been said about aligning IS functionality with the strategic intent and how to organizationally implement strategically aligned systems, less is known of how to successfully implement strategic change associated with system use – a truly critical challenge within strategic IS implementation. Drawing on a strategy-as-practice perspective we address this gap by developing a multi-dimensional view of IS strategy, conceptualizing three key challenges in the IS strategy process, to explain how and why a paper mill, despite successfully implementing a strategic production management system, failed to produce intended strategic change. We call this outcome strategy blindness: organizational incapability to realize the strategic intent of implemented, available system capabilities. Using a longitudinal case study we investigate how cognitive rigidity of key actors and fixed, interrelated practices shaped the implementation of the new production system. We also identify core components and dynamics that constitute a richer multi-dimensional view of the IS strategy implementation (alignment) process. In particular, we identify three salient factors that contribute to strategy blindness – mistranslation of intent, flexibility of the IT artifact and cognitive entrenchment – and discuss how they affect strategic implementation processes. We conclude by discussing implications of our findings for IS strategy theory and practice, especially the contribution of strategy-as-practice to this stream of research.     

The study on the conductivity of styrene-maleic anhydride copolymer electrolytes based on poly(ethylene glycol)400 and LiClO4

Polyelectrolytes, in this study were synthesized from styrene-maleic anhydride (SMA) copolymer, poly(ethylene glycol)400 (PEG400), and lithium perchlorate (LiClO₄). Fourier transform infrared spectroscopy (FTIR), and magic angle spinning (MAS) solid-state NMR were used to monitor the interaction between Li⁺ ions and polymer. The results of FTIR and MAS solid-state NMR indicate the Li⁺ ions are preferentially coordinated to the ether oxygen of PEG. The T_g of the PEG segments in polyelectrolyte increases with LiClO₄ concentration, as determined by differential scanning calorimetry (DSC), indicating that solubility of the Li⁺ ions in the host polymer increases with the PEG content. Impedance spectroscopy (IS) shows that the bulk conductivity of polyelectrolytes and the conductivity behavior obeys the Vogel-Tamman-Fulcher (VTF) equation.     

Assessment of a redox alkaline/iron-chelate absorption process for the removal of dilute hydrogen sulfide in air emissions

The oxidative absorption of hydrogen sulfide (H₂S) into a solution of ferric chelate of trans-1,2- diaminocyclohexanetetraacetate (CDTA) was studied in a counter-current laboratory column randomly packed with 15 mm plastic Ralu rings. The present investigation takes concern about the Kraft pulping situation where dilute H₂S concentrations are omnipresent in large-volume gas effluents. A fractional two-level factorial approach was instigated to determine the significance of six operating variables, namely the solution's alkalinity (pH; 8.5-10.5), the liquid mass flow rate (L;1.73-), the solution's ionic strength (I_C;0.01-), the gas mass flow rate (G;0.19-), the inlet H₂S concentration (C_H2S,0;70-430 ppm) and the initial ferric CDTA concentration (C_Fe,0;100 -). Initially, a Plackett-Burman design matrix of seven duplicated experiments revealed that pH is the leading factor controlling the H₂S conversion rate while the ionic strength and ferric CDTA concentration effects remained negligible within the factorial domain. Surface response analysis based on 11 duplicated factorial experiments plus 10 central composite trials revealed that the H₂S conversion significantly increases with liquid flow rate but decreases with growing H₂S load up. Further examination about the influence of ferric CDTA on H₂S absorption rate was set up over a broader concentration range (C_Fe,0;0- at pH of 9.5 and 10.5. It showed good potential at as H₂S conversion increased by a significant 25% for both pH values in comparison to pure alkaline solutions containing no ferric CDTA.     

基于本体视图特征项抽取方法研究*

为提供比单纯词汇信息更高效的概念特征信息和深层语义信息,并满足面向同一文本的多检索需求,在半自动化智能检索框架中引入本体视图,提出一种基于本体视图的特征项抽取方法。此方法首先针对文本特征建立本体视图;然后结合文本信息进行特征项抽取和类型映射,得到特征项集;最后基于特征项集完成检索过程。检索结果显示,基于本体视图特征项抽取方法能改善检索系统的性能,提高检索的准确率和效率。     

IBR技术与应用综述

IBR技术是一种全新的用于产生真实感图像的技术,主要应用于虚拟实景空间建立,虚拟实景空间漫游和虚拟对象展示。与传统的技术相比,IBR技术的优势主要在于图像的真实性,实时性和与用户的交互性。本文主要介绍了几种常用的IBR技术,以及IBR技术的主流应用,并进行一定的分析比较,总结了IBR技术发展的基础和关键问题。     

面向方面电信系统开发框架的设计与实现

基于.Net Framework和AOP技术提出了电信系统建设的“5＋1”关注点视图,试图解决电信业务开发难度大、周期长的问题。根据“5＋1”关注点视图提出了针对电信业务、基于服务实现的面向方面软件体系结构。基于该软件体系结构开发框架设计及其支持下的软件开发过程可以缩短软件开发周期,改善软件一致性和可维护性,使软件具有更好的演化能力。     

刘勰与曹操诗学观念之比较

《文心雕龙》中的《明诗》篇,主要论述诗歌的历史沿革,但其中些许微言大义,在一定程度上揭示了诗歌创作的基本特质。《文心雕龙》广泛涉及各种问题,结构严谨,论述周详,有很强的系统性和完整性。但其在《明诗》论述四言诗时对魏晋时期的大诗人曹操之字未提。夲论文试从"通变"和"新变"等方面论述,意在探讨刘勰偏见之缘由。     

张謇的职业素质观与当代高职生职业素质的培育

张謇的职业素质观具有丰富的内涵,对现代高职教育的发展和提高人才培养质量具有重大现实意义。当代高职教育应注重学生对职业岗位需求适应性的培养,着力培养具备良好素质和综合能力的职业人。     

对人学五个“要义”和“以人为本”内涵的看法——与顾智明教授商榷

顾智明教授对人学五个＂要义＂和＂以人为本＂内涵的阐释,由于没掌握＂事物本质是由实践定位的＂这个马克思主义的根本方法,因而便导致了其对＂一般人＂、＂具体人＂界定不清,对科学发展观中＂以人为本＂的人,具有双重的价值取向的内涵（在人与物比较上,则＂以人为本＂;在执政党或领导干部与人民群众比较上,则以人民为本）,界定不明,因此,他没有回答出马克思主义人学和科学发展观中＂以人为本＂的人的真谛。这种＂马克思主义人学与思想政治工作创新＂除作者或极少部分研究者明白外,很难变为群众或广大官兵认识和改造世界之武器的。