对地下室工程抗裂措施的几点思考

对某地下室工程设计中采取的抗裂措施进行分析,论证其合理有效性并指出存在的问题,给出设计中预防裂缝产生的技术措施。     

渤海地区电缆地层测试应用效果分析

电缆地层测试与常规测井曲线有效结合可以更好地评价储层,有利于深化对油藏和储层的研究和认识。在收集整理渤海地区大量应用实例的基础上,着重对电缆地层测试在反映储层连通性、流体性质及储集物性等方面的应用情况进行了分析,对电缆地层测试的应用效果和适用范围进行了总结,并提出了合理化建议。     

The preparation and crystallization of long chain branching polylactide made by melt radicals reaction

Long chain branching (LCB) of polylactic acid (PLA) was successfully prepared by melt radicals reaction with pentaerythritol triacrylate (PETA) and bis (1‐methyl‐1‐phenylethyl) peroxide (DCP). The topological structure of the LCB was investigated by rheology and branch‐on‐branch (BOB) model was used to estimate the exact chain structures of the products, where comb‐like LCB structures were generated due to the complex coupling between different macro‐radicals. LCB structure was found to affect the crystallization of PLA products. In the temperature range of 110–130°C, the crystallization rate parameter (k) was improved sharply and the half crystallization time was decreased significantly after the grafting of PETA, which was ascribed to the enhanced hydrogen bonding in PETA‐grafted long chain branching PLA. By comparing with the LCB PLA made from chain extension using multifunctional monomer, it shows that the crystallization becomes slower in a highly branched material with extremely long relaxation time if the effect of hydrogen bonding is similar. © 2013 Wiley Periodicals, Inc. J. Appl. Polym. Sci., 2013     

二氧化锆三维有序大孔材料的制备及孔壁特性

高比表面积、内部连通有序网络结构的ZrO2三维有序大孔材料,在太阳能电池、锂电池、化学催化等领域具有重要的应用前景。采用聚苯乙烯胶体晶体为模板,ZrOCl2.8H2O为锆源,通过高温热解法获得ZrO2三维有序大孔结构。采用扫描电子显微镜、透射电子显微镜、能量色散谱以及红外光谱对三维有序大孔孔壁的显微结构和化学组成等特性进行研究。结果表明:通过改变热处理温度和聚苯乙烯球尺寸,可对三维有序大孔结构进行调控;在450～550℃煅烧温度范围内,可得到表面负载有—C—O基团的单斜相ZrO2三维有序大孔材料。     

从废弃印刷线路板中回收金的试验

试验研究了采用硫脲法有效地从废弃印刷线路板中回收金。试验结果表明，硫脲回收金的主要影响因素有：温度、硫脲质量浓度、Fe^3＋质量分数、浸出时间、硫酸体积分数；合适的浸出条件是：固液比为1：5，浸出温度为35℃，硫脲质量浓度为10g／l，Fe^3＋抖质量分数为0．3％，浸出时间为1h，硫酸体积分数为5％。     

安徽天下道源酒业苔干贡酒的研制

介绍了苔干食用价值及药用价值,提供了以苔干为主要原料酿酒方案,具体对生产过程中糖度的调整、酸度的调整、干酵母添加量及发窖温度控制等方面全面进行论述。     

Composite coatings based on konjac glucomannan and sodium alginate modified with allicin and in situ SiOx for ginger rhizomes preservation

Ginger is a condiment vegetable and widely cultivated in many countries for its important role as spice and medicinal herb in international trade. However, the quality of fresh ginger will reduce after harvest and during storage. In the present study, edible coatings were developed based on konjac glucomannan (KGM) and sodium alginate (SA), incorporating with allicin and in situ SiOx. The coatings were characterized, and the effects of the coatings on the quality of ginger were evaluated. The results demonstrate that the addition of allicin improve the compatibility of KGM and SA in film, and the addition of allicin and in situ SiOx promote more hydrogen bond formation in the film. The physicochemical properties of KGM/SA film are improved due to modification, and allicin coating is optimal for mechanical properties, while allicin‐SiOx film is optimal both for mechanical properties and gas barrier. The KGM/SA coatings especially KGM/SA‐allicin‐SiOx significantly inhibited the total phenol, flavonoid, total soluble sugars content, enzyme activities such as peroxidase (POD), polyphenol oxidase (PPO), and cellulase of gingers during storage. In addition, KGM/SA coatings effectively preserved the ascorbic acid (AsA), and titratable acidity (TA). Over all, KGA/SA coatings, especially with allicin and in situ SiOx, exhibited more significant and positive effects on quality of gingers during storage. Therefore, the KGM/SA coatings are promising in gingers preservation.     

基于Criminisi算法的非周期性印花织物缺陷检测

由于非周期印花织物颜色多变、花型复杂、印花缺陷纹理及背景纹理之间对比度低,导致织物缺陷不易被识别,因此给出一种Criminisi算法。首先,采用频率谐调(frequency-tuned,FT)显著性算法对印花织物缺陷图像进行显著性增强,突出缺陷的边缘轮廓;其次,利用大津阈值法对显著图进行二值化处理,并将得到的二值图作为图像修复时的Mask掩码图;最后,运用Criminisi算法对原印花织物缺陷图像进行修复,将修复的印花图像减去原印花缺陷图像,获得缺陷区域。实验结果表明,该方法能准确分割出非周期性印花织物的缺陷区域,如漏墨、污渍等,且检测准确率达97.39%。同时,实验过程中不涉及参数的调节。     

浅议提高浓香型白酒的丰满度

就制曲原料的选择、工艺控制、窖池养护、贮存勾兑等方面对酒体丰满度的影响进行讨论。指出全面提高酒体丰满度的关键着手点在于强化微生物制曲、做好窖池发酵管理工作及勾兑等。     

冷却方式对抽水蓄能机组定子绝缘特性的影响

抽水蓄能机组中,发电-电动机具有频繁起停、负荷变化剧烈的特点。近年来其大容量、高水头发展进程使电机频繁负荷变化所产生的热应力对电机安全可靠性的影响越来越不可忽视。热应力不仅与热负荷变化速率、电机结构特征有关,还与发电-电动机的冷却方式直接相关。首先对几种冷却方式应用于发电-电动机中的优缺点进行定性分析,继而提出以对比分析冷却方式对主绝缘冷热循环老化影响为目的的冷热循环实验设计原则,最后通过冷热循环老化实验的形式、以最大局部放电量为绝缘性能的表征参数,定量研究冷却方式对抽水蓄能机组中定子绝缘特性的影响。结果表明,采用蒸发冷却技术的定子线棒抗冷热循环老化性能要明显优于采用通风冷却的定子线棒。