稀土辅助类芬顿效应降解染料废水

以考马斯亮蓝为研究对象,应用类芬顿效应对其进行降解处理。研究了铁负载氧化镧类芬顿系统催化剂的用量,过氧化氢的投加量,pH,底物的初始浓度对处理效果的影响。实验表明,在最优的运行条件下,CBG的脱色效果可达99.48%,其中铁离子的凝絮作用也是不可忽视的重要因素,但是COD的去除率仅有34.4%。所以还需对其进行二次处理...     

三种植物性杀虫剂对烟草码绢金龟生物活性的研究

室内生物活性测定表明,印楝素对烟草码绢金龟成虫具有较强的忌避作用和拒食作用,苦楝油作用稍弱,烟株表现出药害症状;除虫菊反而具有一定的诱集和刺激取食效果。这3种植物性杀虫剂均无明显的毒杀作用。根据1%印楝素安全、活性高,但药效期较短的特点,提出了用印楝素防治码绢金龟的建议。      

光纤端面耦合特性研究

本文主要从光纤的各种端面效应出发,分析了不同形状端面光纤之间的耦合特性,并给出了相应的实验结果.     

线宽小于0．5kHz稳态的单频光纤环形腔激光器

报道了利用在未泵浦掺铒光纤中,驻波饱和吸收诱发的自写入光纤光栅的窄带滤波特性及反射波长自适应特性,研制了单频光纤激光器,其线宽可窄至0．5kHz以下,输出光功率大于1dBm,不跳模时间大于3小时,通过零拍法成功地观测了跳模时的谱特性。     

Investigation of heat transfer and pressure drop in plate heat exchangers having different surface profiles

It would be misleading to consider only cost aspect of the design of a heat exchanger. High maintenance costs increase total cost during the services life of heat exchanger. Therefore exergy analysis and energy saving are very important parameters in the heat exchanger design. In this study, the effects of surface geometries of three different type heat exchangers called as PHE_flat (Flat plate heat exchanger), PHE_corrugated (Corrugated plate heat exchanger) and PHE_asteriks (Asterisk plate heat exchanger) on heat transfer, friction factor and exergy loss were investigated experimentally. The experiments were carried out for a heat exchanger with single pass under condition of parallel and counter flow. In this study, experiments were conducted for laminar flow conditions. Reynolds number and Prandtl number were in the range of 50 ? Re ? 1000 and 3 ? Pr ? 7, respectively. Heat transfer, friction factor and exergy loss correlations were obtained according to the experimental results.     

Dyeing of Chicken Feather Fibers with Natural Dyes

ABSTRACT

In this study, coloration of the feather fibers with natural dye sources was examined. By this way it was planned to introduce colored chicken feather fibers to serve for different textile applications. For the coloration of the feather fibers, the natural dye sources “Buckthorn,” “Madder,” and “Hibiscus” were used. During the dyeing process, different mordanting agents were added to the dye bath to see the effect of the mordanting agents and also dyeing of the feather fibers without use of any mordanting agent was investigated. Afterwards samples were evaluated in terms of color efficiencies and color values. Moreover, the washing and light fastnesses of the samples were tested. As a result, it was observed that the tested natural dye sources can be used for the coloration of the chicken feather fibers and different colors can be easily obtained with the use of these natural dye sources and mordants.     

注重内涵式发展,促进城市复兴——以青岛老工业区为例

青岛老工业区出现逐渐衰败、城市内部土地利用低效、城市发展片面注重外延式发展等问题.城市规划应注重内涵式发展,集约利用土地,复兴老工业区.青岛老工业区应大力发展都市产业;保护和利用历史建筑,发展工业旅游;注重特色工业品牌的塑造;大力发展循环经济;设定企业准入门槛.     

正压送风过滤式液体推进剂防护头罩

采用电动送风与颈部密封技术,研制了一种可满足各种人群需要、适合于正常推进剂作业,对液体喷溅防护性能更好、人体负荷更小的正压式电动送风防护头罩,适用于火箭推进剂二级防护和事故状态下人员逃逸.     

防护材料耐硝酸羟胺溶液渗透性能实验方法

通过自制的渗透性能测试装置测定不同皮肤防护材料的渗透时间和渗透率,考察试片耐硝酸羟胺基推进剂的渗透性能,建立皮肤防护材料耐硝酸羟胺基推进剂渗透性能测试方法,并选择相应的防护材料,据此作为硝酸羟胺基推进剂防护装具主材质的选择依据.通过几种防护材料渗透性能的测试比对,确定涤纶基布涂覆聚氨酯作为硝酸羟胺防护服和面罩基本材料,选择0.40 mm胶膜厚度的丁基胶作为防护手套材料.     

泡沫铝填充管研究进展

介绍了泡沫铝填充薄壁管的国内外研究状况,主要包括对泡沫铝填充管在压缩和弯曲过程的研究,并详细阐述了泡沫铝填充管的力学性能及吸能特性的研究,最后分析了泡沫铝填充管的发展方向。