PVC生产中的二次水回收工艺改造

介绍了在PVC生产过程中产生的蒸汽冷凝水、压滤水、废自来水、母液水的回收和综合利用的情况。工艺改进后,青岛海晶化工集团有限公司12万t/a PVC装置可节水67万t/a,节约资金204万元/a。     

分离式反应器在精细化工中的应用

对分离式反应器原理进行了分析 ,将分离式反应器用于汽液反应 ,可使反应的选择性大大提高     

双环戊二烯改性不饱和聚酯树脂的研究

探讨了双环戊二烯改性不饱和聚酯树脂的各种影响因素及其合成的主要工艺条件。当顺酐和苯酐的物质的量的比为0.22;双环戊二烯和总酸的物质的量的比为0.15;催化剂用量为0.24%;苯乙烯用量为30%～35%;封端温度控制在155℃;加成时间为3h时,合成的树脂具有良好的气干性。     

离子色谱法测定配煤、焦炭和焦油中的氯含量

研究了用带电导检测器的离子色谱对配煤、焦炭和焦油中的Cl- 进行测定的方法。在YSA型8126A-4# 阴离子分离柱上用3.5mmol/LNa2CO3、5.3mmol/LNaHCO3做淋洗液对Cl-进行测定,方法简便快速。Cl-的检出限为2×10-6。该法也适用于F-、NO2-、NO3-、SO42-等的测定。     

Effects of the solvent polarity on the atom transfer radical polymerization of methyl methacrylate initiated by 4‐(chloromethyl)phenyltrimethoxysilane

The controllability of the atom transfer radical polymerization of methyl methacrylate in the polar solvent N,N‐dimethylformamide and the nonpolar solvent xylene with 4‐(chloromethyl)phenyltrimethoxysilane as an initiator and with CuCl/2,2′‐bipyridine and CuCl/4,4′‐di(5‐nonyl)‐2,2′‐bipyridine as catalyst systems was studied. Gel permeation chromatography analysis established that in the nonpolar solvent xylene, much better control of the molecular weight and polydispersity of poly(methyl methacrylate) was achieved with the CuCl/4,4′‐di(5‐nonyl)‐2,2′‐bipyridine catalyst system than with the CuCl/2,2′‐bipyridine as catalyst system. In the polar solvent N,N‐dimethylformamide, unlike in xylene, the polymerization was more controllable with the CuCl/2,2′‐bipyridine catalyst system than with the CuCl/4,4′‐di(5‐nonyl)‐2,2′‐bipyridine catalyst system. © 2007 Wiley Periodicals, Inc. J Appl Polym Sci 104: 2751–2754, 2007     

传染性法氏囊病病毒疫苗B87株基因组B节段的克隆和序列分析

目的获得传染性法氏囊病病毒(IBDV)疫苗B87株B节段全长cDNA,并对其序列进行分析,为进一步在分子水平上研究病毒基因组的功能、抗原变异和毒力变异奠定基础。方法使用蛋白酶K和酚/氯仿抽提法提取病毒基因组RNA,用LiCl分级沉淀方法纯化病毒基因组dsRNA,通过RT-PCR一步扩增获得B节段的全长cDNA。将其克隆到pGEM-T载体上,然后测序,并用DNAStar软件进行序列分析。结果测序结果表明,克隆的B87株基因组B节段全长为2827bp,与超强毒参考株UK661和HK46的同源性分别为89.8%和89.3%,与强毒参考株Harbin-1和ZJ2000的同源性分别为90.2%和89.5%;与变异毒株GLS的同源性为97.8%;与弱毒参考株CEF94和Gt株的同源性均为99.8%,与P2株的同源性达100%。结论通过对9株IBDV编码氨基酸序列进行分析、比较,推测B节段上10个独特的氨基酸位点可能与毒力相关。     

添加剂在固相法制备三氧化二铬中作用的研究

研究了在固相法制备三氧化二铬中多种添加剂对三氧化二铬性能，特别是六价铬残留量和表面性质的影响。     

某坝肩边坡开挖优化设计方案研究

为了研究前坪水库右坝肩边坡在设计方案和优化设计方案开挖下的边坡稳定性分析,采用数值分析和极限平衡法进行研究,首先针对边坡典型剖面进行了数值分析,研究边坡的位移和应力分布规律,然后运用极限平衡法得出边坡的安全系数,两种方法结合不仅可以反映边坡的稳定性和位移场之间的关系,而且可以用工程界所熟悉的安全系数来评价边坡的稳定性。结果表明边坡开挖优化设计方案满足边坡稳定性规范要求,且优化方案减少了开挖量,节省了工程投资,使得工程尽早发挥效益。     

3D Shape Segmentation and Labeling via Extreme Learning Machine

We propose a fast method for 3D shape segmentation and labeling via Extreme Learning Machine (ELM). Given a set of example shapes with labeled segmentation, we train an ELM classifier and use it to produce initial segmentation for test shapes. Based on the initial segmentation, we compute the final smooth segmentation through a graph‐cut optimization constrained by the super‐face boundaries obtained by over‐segmentation and the active contours computed from ELM segmentation. Experimental results show that our method achieves comparable results against the state‐of‐the‐arts, but reduces the training time by approximately two orders of magnitude, both for face‐level and super‐face‐level, making it scale well for large datasets. Based on such notable improvement, we demonstrate the application of our method for fast online sequential learning for 3D shape segmentation at face level, as well as realtime sequential learning at super‐face level.