聚氨酯改性环氧树脂水分散体的合成

通过异氰酸酯基与羟基的反应,将醚键和羧基接入到环氧树脂分子骨架中,同时对环氧树脂进行亲水改性和增韧改性,中和成盐并水分散,合成了聚氨酯改性环氧树脂水分散体.讨论了OH/NCO值、聚醚二元醇含量、羧基含量和中和度等因素对水分散体及涂膜的影响.结果发现OH/NCO值增大,分散体外观改善,粘度下降,但涂膜吸水率增大,柔韧性下降;Diol 1 000含量的增加,乳液外观逐渐变透明,与固化剂的相容性也逐渐变好,涂膜光泽度增大,但硬度降低;-COOH含量增大,水分散体的稳定性增强;羧基中和度的增大,分散体粘度总体上呈上升趋势.     

基于预聚类主动半监督的作战体系效能评估

针对作战仿真实验中体系效能通常依靠专家评估、评估代价较大的问题,提出一种基于预聚类主动半监督学习的作战体系效能评估方法。明确了使用该方法进行作战体系效能评估的基本流程,以及自顶向下的评估模式和二值化的评估标准。重点构建了预聚类主动半监督学习算法,首先,结合作战仿真实验数据的特点,对未评估样本进行预聚类,选择最有价值的样本供专家标注;然后,使用已标注的样本训练主动学习算法和半监督学习算法的公用学习器;最后,利用主动学习算法挑选价值较高的样本交由专家评估,并利用新样本对学习器进行不断更新。作战仿真实验数据表明,该方法在达到预期评估准确度的同时降低了评估代价,能有效应用于大规模作战仿真实验的体系效能评估。     

Micro-expression recognition algorithm based on the combination of spatial and temporal domains

Aiming at the problem of unsatisfactory effects of traditional micro-expression recognition algorithms,an efficient micro-expression recognition algorithm is proposed,which uses convolutional neural networks(CNN) to extract spatial features of micro-expressions,and long short-term memory network(LSTM) to extract time domain features.CNN and LSTM are combined as the basis of micro-expression recognition.In many CNN structures,the visual geometry group(VGG) using a small convolution kernel is finally selected as the pre-network through comparison.Due to the difficulty of deep learning training and over-fitting,the dropout method and batch normalization method are used to solve the problem in the VGG network.Two data sets CASME and CASME II are used for test comparison,in order to solve the problem of insufficient data sets,randomly determine the starting frame,and a fixedlength frame sequence is used as the standard,and repeatedly read all sample frames of the entire data set to achieve trayersal and data amplification.Finallv.a hieh recognition rate of 67.48% is achieved.     

双乙酸钠合成工艺条件的优化

对采用醋酸－碳酸钠法（以乙醇为溶剂）制备双乙酸钠的条件进行了详细的研究，确定了影响收率的主、次因素依次为反应温度、物料比、反应时间。优化工艺的条件为反应温度94℃，Na2CO3和HAc的投料比为1：3.9，反应时间60min。另对产品进行了质量分析，通报了合成双乙酸钠的最新方法。     

基于SAP的采购系统设计

本文以项目软件工程过程为基础,对系统进行调研,针对用户需求进行业务蓝图设计与系统分析,并依据设计理念进行系统测试与实现,进行项目实施及后续支持描述与优化.建立一个以加快响应速度、降低采购成本、提高经济效益为主要目的,基于SAP物料管理为主要内容的易于维护的采购平台.     

压力下半导体GaAs的电子表面态

使用插值拟合近似获得晶格常数、带隙随压力的解析表示，采用变分法研究了流体静力学压力对半导体GaAs电子本征表面态的影响，数值结果表明，随压力增加电子表面态能级明显向上移动，且电子趋近表面。     

威廉姆斯批判康德主义的是与非

伯纳德·威廉姆斯在《英国时报》中被称为“他那个时代最重要的、最有才华的哲学家”，尤其是在20世纪下半叶他对哲学伦理学做出了重要贡献。国内外学界对于威廉姆斯批判康德主义（和功利主义）所阐发的洞见给予了肯定和褒扬，有人认为他主导了近30年来西方伦理理论的思维定式，但同时也始终不乏有着一些否定和贬斥的声音。     

Complexity-reduced ICI cancellation for OFDM system over doubly-selective channels

In doubly-selective fading wireless channel,the conventional orthogonal frequency division multi-plexing(OFDM)receivers for inter-carrier interference(ICI)compensation require extensive computa-tions.To obtain an effective balance between performance and complexity,the whole channel responsematrix was decomposed into a sequence of submatrix,and then a novel equalizer based on minimum meansquare error(MMSE)criterion was presented to combat the ICI.Furthermore,a simple ordering-baseddecision-feedback equa...     

Sequence similarity analysis of non-self CTL epitopes and mouse proteins using sequence alignment

This research analyzed amino acid sequence similarity between non-self T cell epitopes recognized by mouse antibodies and mouse proteins. Using sequence alignment,we found that only 8 of 1 108 epitopes are highly similar to mouse protein sequences. The result shows that non-self T cell epitopes are not similar or have little similarity to mouse protein sequences. Furthermore,reviewing the related literature,we also found that the eight epitopes would trigger immune responses in some particular environment,which are ignored by T cells in normal condition. The result suggests that no or low-similarity peptide vaccines can reduce the chance of collateral cross-reactions and enhance the antigen-specific immune response to vaccine.     

康德伦理学的失误及其原因——舍勒对康德伦理学的批判

舍勒把康德伦理学当作形式先天的伦理学理论代表，而舍勒建立起来的伦理学理论是质料先天的价值伦理学。两种伦理学的根本区别在于：究竞是把“合法则”和“违法则”的形式当作评判行为善恶的唯一标准，还是把价值及其秩序当作行为善恶的最终根据。实际上，道德法则本身也必须以价值及其秩序作为依据，因此舍勒伦理学是对康德伦理学的深化和补充，而后者之所以没有看到这个更为根本的伦常事实，是错误的人性预设所造成的，并且这个错误的人性预设实际上危害到了人们的道德生活。