JYF-831分散匀染剂的性能及应用

在纺织品染色中,人们都希望染料能均匀地染着在被染物上。亦希望染出的颜色色泽鲜艳。染物出现色斑和着色不匀等现象,虽然与染料本身的性能、染色工艺、染色设备以及水质等因素有关,但也与是否选用了适宜的染料助剂有关。例如:用分散染料染涤纶织物时,配用一定量分散性及匀染性良好的染料助剂,即可获得令人满意的匀染效果。 为了提高纺织品的染色质量,纺织印染行业每年都要从国外进口大量的染料助剂。据了解,上海纺织工业局1981年仅从日本田华化学工业公司进口的高温染色分散剂Sunsalt 7000就有50多吨。为了减少对国外     

基于AHP-熵权法组合赋权的供水管网安全评估方法

作为城市生命线工程系统之一,市政供水管网的安全评估具有重要意义。本文提出一种基于AHP-熵权法组合赋权的供水管网安全评估方法,首先建立了供水管网安全评估指标体系,同时引入了结合层次分析法和熵权法的组合赋权法,建立安全评估模型,可以给出管道的风险得分和风险等级,为后续管道运维巡检提供依据。最后对某城市区域供水管网进行了案例分析,结果表明,建议的方法能较科学可信地识别供水管网高风险管段。     

Sediment provenance discrimination in northern Okinawa Trough during the last 24 ka and paleoenvironmental implication:rare earth elements evidence

Rare earth elements(REE) compositions and discriminant function were successfully used to examine high resolution sediment source changes in the northern Okinawa Trough over the last 24.1 ka,especially for the influence from the Yellow River and the Tsushima Warm Current(TWC) that has not been well solved.Variations of these parameters were clearly divided into three distinct depositional units.During Interval 1(24.1-16.0 ka BP),the paleo-Yellow River and the paleo-Yangtze River mouths were situated near the studied area and could have played major roles in the sedimentation therein.In Interval 2(16.0-7.3 ka BP),these river mouths gradually retreated with global sea-level rise,leading to less fluvial inputs from them to the northern Okinawa Trough.Meanwhile,formation of the TWC could carry some sediment loads of Taiwan to the studied core,especially during its late phase(8.0-7.3 ka BP).Modern oceanographic conditions,with a predominance of the TWC,were finally established since the beginning of Interval 3,causing more terrigenous contribution from Taiwan to the studied area.Sub-sequently,modern depositional environments mainly influenced by the Yellow River,the Yangtze River,and the TWC were finally formed.     

基于ARCGIS的供水GIS系统接口应用的分析及探索

供水G1S应用系统不应该是孤立和封闭的系统，而应该能够与供水管理的各个环节和现有的各种生产业务管理系统（如SCADA系统、新装业务系统、帐务系统、管网养护系统等）进行有机的结合，使之构成一个集成的、综合的信息管理和决策支持公共平台。     

区域供水管网DMA规划方案研究

在区域供水管网规划阶段引入DMA(District Meter Area)理念,根据自然条件并结合管网布局情况,探讨管网分区原则;在给水管网建模基础上对DMA规划方案进行评估。通过模拟计算,本规划方案能满足该区域供水安全要求;通过费用分析,在规划、设计前期实施DMA技术,可有效节省建设成本。避免在现状管网中实施分区造成的不便,为提升供水管网规划及设计水平,提高供水企业管网的管理和运营水平做出有益尝试。     

溶剂法合成对-硝基苯腈

对-硝基苯腈是制备染料和颜料的中间体的杂环化合物的重要原料。由羧酸制腈,按文献报导,一般是分几步进行的:首先羧酸与酰卤化剂作用生成羧酰卤化物;接着和氨反应得羧酰胺;最后脱水成腈。此方法的缺点:各步反应生成物均需分离、纯化、干燥等手续。同时产生大量废酸、废水和废气,对环境污染严重,直接危害操作