Syntheses of new black dyes for ink-jet inks

Drop-on-demand ink-jet inks made from dyes generally show poor light and wet fastness. A number of studies have been carried out previously to improve the fastness of such inks by introducing novel dyes and new additives. Based on the research results, use of fast dyes could give ink-jet inks with good properties. This study describes new black dyes for aqueous ink-jet inks, which show better light and wet fastness and print quality, compared to an analogous ink formulated from CI Food Black 2.     

资讯类新闻套图系统

考虑到图片具有对事件诠释力强,传播便利的特点,研究了从大量数据密集的新闻Web页面中自动提取数据,并组织成套图结构展现给用户。基于页面模板实现动态页面抽取和解析,处理转换为对应的套图数据结构。基于余弦相关性对来自不同网站的新闻套图数据进行去重,并根据相应的标准,为数据集进行评分排序。考虑巨大的新闻数据和用户数量,本系统基于hadoop分布式平台,满足系统的高可扩展性。本文将详细描述我们的系统设计和实现,并公布在百度资讯图片栏目上的运行结果。     

基于区间直觉模糊的情感分类模型

随着电子商务,个人博客,社交网站和微博的蓬勃发展,互联网进入了一个崭新的时代,而在线评论的情感分类关系到个人决策、企业管理甚至社会安全．提出了一种基于区间直觉模糊的情感分类模型,采用了区间直觉模糊算子来计算特征词的区间直觉模糊数,利用区间直觉模糊集的隶属度、非隶属度和犹豫度分别定量地描述特征词,通过情感合成确定文本的情感倾向,从而获得准确率较高的情感倾向性分析结果．最后通过相同语料库的比较实验证明该分类模型的可行性、正确性和较高的分类性能．     

Absorption of NO x in packed column (I)

A mathematical model for an absorption of nitrogen oxides into water in packed column was developed based on the mass-transfer coefficient in packed column and the chemical reaction accompanying NO _x absorption produces HNO₃ and HNO₂ in the liquid phase. The subsequent dissociation of HNO₂ in the liquid-phase results in the formation of HNO₃ and NO gas, and then this NO gas follows to be oxidized by O₂ in air. The important factors influenced on the absorption of NO _x are the oxidation state of NO gas and the partial pressure of nitrogen oxides in the gas. The efficiency of NO _x absorption increases with the increase of the partial pressure of NO _x . The most critical value for using the model is the constant of .The selection of 11×10⁻⁴kg·mol/atm·m²·sec for resonable for this model.     

有机锡化合物的用途

有机锡化合物在工业、农业、医药和材料等方面有其极为广泛的用途，本文概述了有机锡化合物作为塑料热稳定剂、生物杀伤药剂和均相催化剂的应用。     

间羟基三氟甲苯的合成

以三氟甲苯为原料，经硝化、还原、重氮化、水解等过程，可以得到重要的农药中间体间羟基三氟甲苯，产物总收率达70％以上，在较高温度下进行重氮化反应时，可以显著提高间氨基三氟甲苯重氮化、水解反应的收率。     

Accommodation and convergence in integral imaging 3D display

In this paper, we analyze the visual fatigue of integral imaging three‐dimensional (3D) display by studying the accommodation and convergence when viewing the integral imaging 3D images. The theoretical analyses show that there is no inconsistency between the accommodation and convergence distances, which means that the integral imaging 3D display has no visual fatigue. Experiments are implemented, and the results finally demonstrate the rationality of the theoretical analyses. These analyses can be quite beneficial for researchers to better understand the performances and promote the practical applications of the integral imaging 3D display.     

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.     

Penetration behavior and subsurface grafting of dansyl cadaverine and polyethylene glycol (PEG) derivatives in poly(ethylene-co-acrylic acid) (EAA) film

Dansyl cadaverine and polyethylene glycol (PEG) derivatives were grafted on the surface of EAA film and in its subsurface region through formation of amides and esters, respectively. A two-step reaction was conducted. First, EAA film was activated with PCl₅ at room temperature. Second, the acid chloride was reacted with dansyl cadaverine or a PEG derivative to form a modified film. ATR-FTIR spectroscopy and fluorometry were employed to analyze the modified films after each step. It was found that dichloromethane yielded the highest grafting efficiency, with the dansyl cadaverine penetrating throughout the ATR-FTIR analysis region (∼400 nm) in a few minutes. As the grafting depth increased with time, so did the amount of fluorescence intensity of grafted dansyl cadaverine. ATR-FTIR spectra for PEG grafting indicated that the acid chloride peak decreased with time, while the ester peak increased. However, hydrolysis occurred at later times, consuming the acid chloride groups within the film. A marked decrease of static water contact angle was observed for EAA grafted with PEG99 (PEG that contains 99 ethylene glycol repeat units), almost 40° lower than that of neat EAA (∼99°). For other PEG-grafted films, the surface hydrophilicity was also improved.     

Experimental analysis of bubble mode in a plate-type absorber

An experimental analysis of ammonia-water absorption was performed in a plate-type absorber. The flow of water and ammonia gas was performed in the bubble mode. The experiments were made to examine the effects of solution flow rate and gas flow rate on the performance of the absorber. It was found that the increase of solution flow rate rarely affected the mass transfer, but improved the heat transfer. As the gas flow rate increased, slugging occurred in the bubble mode and influenced the thermal boundary layer. Finally, the results were converted into dimensionless numbers to elucidate physical phenomena and plotted as Sherwood number versus Reynolds number for mass transfer performance and Nusselt number versus Reynolds number for heat transfer performance.