Visual experience for autostereoscopic 3D projection display

In order to investigate visual experience for watching the autostereoscopic three‐dimensional (3D) projection display, we conduct a subjective evaluation experiment by a questionnaire when viewing video clips. Factor analysis is adopted to classify the evaluation items for the perpetual constructs of visual experience. Then a mixed design with repeated measurement analysis of variance with dimension and display duration as factors is carried out on the evaluation data to check the factorial effects and interactions for statistical significance. The results of factor analysis extract five factors including visual comfort, image quality, distortion, naturalness, and presence, which can be used as comprehensive indicators to evaluate the autostereoscopic 3D projection display. The results of analysis of variance indicate that image quality, which is used to assess two‐dimensional contents, is no longer applicable. It is necessary to give consideration to depth when evaluating 3D visual experience. Although 3D scenes enhance the overall subjective performance such as naturalness and presence, the health issues and stereoscopic distortion related to the introduction of depth cannot be ignored.     

Structure and properties of collagen‐konjac glucomannan‐sodium alginate blend films

A new kind of blend film was made by mixing the solutions of collagen, konjac glucommnnan (KGM), and sodium alginate. The structure of the blend film was characterized by FTIR, XRD, atomic absorption spectrophotometer, and SEM, respectively. The effects of weight ratio between the polymers on light transmittance, tensile strength, elongation at break, water permeability, and water absorption of the film were studied. The results showed that there were strong interactions and good compatibility between collagen, KGM, and sodium alginate in the film. The film possesses good mechanical properties. Therefore, it can be applied in biomedicine as a new type of biomaterial. © 2007 Wiley Periodicals, Inc. J Appl Polym Sci 2007     

呋咱衍生物的合成

报道了呋咱衍生物的制备方法.酮经α-亚硝基化,然后异构化为单肟,单肟和盐酸羟胺缩合生成二肟,然后用溶剂法脱水生成呋咱衍生物,成环收率45%～55%.产物经1H-NMR,质谱和元素分析鉴定.     

有机肥在有机无机复混肥中的效果

通过茄子在无肥、商品有机肥、无机复混肥和有机无机复混肥4处理的一次基肥使用试验,对产量、开展度、花蕾数、结果数和单果量考察和统计分析反映出有机无机复混肥与无机复混肥的肥效基本相同;商品有机肥似具有与化肥一样的速效性;要使有机肥发挥肥效,只有增加有机肥使用量;不能期望通过有机无机复混肥中加入少量有机肥来体现有机肥的肥效.     

MgF2基催化剂合成CH2F2的研究

用混合法制备了一系列含Cr3＋和过渡金属助剂的MgF2基催化剂。考察了助剂对CrF3/ MgF2 催化剂氟化CH2Cl2的催化性能，结果表明，在Cr3＋/ MgF2中添加一定的Co2＋和Ni2＋能提高催化剂稳定性，延长使用寿命；Zn2＋能提高CH2F2的选择性；Fe3＋和Cu2＋对Cr3＋/ MgF2的活性有抑制作用。讨论了配料比、空速和温度等反应条件对催化剂性能的影响。     

KINETICS ON EPOXIDATION OF PROPYLENE WITH ETHYLBENZENE HYDROPEROXIDE

In the range of 76° to 1200C,Dalin and others studied the kinetics on molybdenum-catalyzed epoxi-dation of propylene with ethylbenzene hydroperoxide,proposed a mechanism model of this reaction andsuggested that effective concentration of catalyst is constant during the process of epoxidation.In thispaper the reaction has been studied experimentally based on Dalin's investigation.After analyzing thedata obtained in our experiment and those of Dalin,it is shown that the effective concentration of thecatalyst is not a constant but a variable,and its rate of consumption behaves in accordance with the firstorder reaction.Thus,the authors have modified the mechanism model in literature [3] and pointed outthat the deactivation mechanism of the catalyst is different from the inhibition mechanism described byFarberof.     

弹性外墙乳胶漆耐沾污性的研究进展

分析了弹性乳胶漆涂膜污染的机理,并提出提高涂膜耐沾污性的措施.     

电力绝缘用六氟化硫替代物的过去、现在和未来

本文综述了电力绝缘用SF6替代物的开发方法、发展现状和未来趋势。其开发方法包括替代物的设计与确认（物性、安全性评价、环境影响的评价等）、合成、产业化等内容。目前，开发出的SF6替代物包括SF6混合气体、饱和卤代烃、氢氟烯烃、全氟酮和全氟腈，其中七氟异丁腈的绝缘性能优异，是SF6最佳的替代物。同时文中综述了现有七氟异丁腈的合成路线，其中以碳酰氟和六氟丙烯为起始原料催化反应合成七氟异丁腈的路线，具有高效、绿色、环保的优点。以过去发展历程和现在发现现状为基础，展望了SF6替代物的未来发展趋势，提出今后的研究重点在于全面开发七氟异丁腈的应用配套设备，下一代SF6替代物及其绿色、高效的产业化路线。     

歧化松香钾皂制备方法的改进与性能研究

以歧化松香为主要原料,在较低的温度(75~95℃)下,溶入KOH水溶液,并进行皂化反应,制备固体份质量分数45%的歧化松香钾皂。研究了反应温度、皂化时间、pH值、添加复合助剂TX-A对反应速度、去氢枞酸钾含量,以及黏度、结晶、胶凝等产品性能的影响。得出歧化松香钾皂化的较佳制备条件为:pH值为10.36,皂化时间分别为120 min(未加TX-A)、98 min(加TX-A),反应温度85℃,TX-A加入量为反应物质量的0.2%。制备出的歧化松香钾皂产品,在性能上完全符合行业标准ZBB 72003-84的要求,并且结晶、胶凝性质有所改善,加纳色号标准降低两个等级。     

SE-I型混凝剂在水处理中的应用

利用透射电镜和微孔滤膜超滤法研究了SE -I和PAC混凝剂的结构形貌和相对分子质量分布情况 ;比较了SE -I和PAC混凝处理油田含油废水、煤矿矿井废水和水库水的效果。实验结果表明 ,SE -I较PAC具有更大的枝化度和相对分子质量 ,体现在水处理效果上是SE -I较PAC有更好的除油、除浊、去除COD和脱色效果。SE -I型混凝剂是一种高效水处理剂