壳聚糖和粉煤灰对间甲酚的吸附处理

用壳聚糖和粉煤灰对含间甲酚的废水进行吸附处理,考察了壳聚糖的用量、振荡时间、振荡速度以及粉煤灰与壳聚糖的混合比对处理效果的影响.结果表明:在常温下,对于初始质量浓度为56 mg/L的间甲酚,当壳聚糖用量为3 g/L,以170 r/min的转速吸附振荡0.5 h,去除率可达到88%以上;在上述条件下,加入质量比4:1的粉煤灰与壳聚糖混合物5g/L时,间甲酚的去除率可达到91%.     

Remarks on different reviews of Chinese character recognition

This paper gives an introduction and remarks on two review papers for Chinese character recognition. One review is made by Chinese authors, another is from American scientists. They investigate Chinese character from different language environments; they do the research from different points of view. Thus, a more comprehensive view on Chinese character recognition, which is an important branch of pattern recognition, can be provided to the readers. Meantime, one article pays attention to online process, and other paper deals with offline recognition, which complement each other. The author is the Associate Editor-in-Chief of Frontiers of Computer Science in China     

合成2,4-二叔丁基苯酚工业试验

以离子交换树脂为催化剂，苯酚和甲基叔丁基醚为原料合成2，4-二叔丁基苯酚(简称2，4酚)，合成产物经过滤再经间歇真空精馏精制提纯，得到高纯度的2，4酚成品。成品精馏后釜中残液在酸性白土催化剂的作用下通过歧化反应生成对叔丁基苯酚，再经精馏提纯得到成品对叔丁基苯酚。通过工艺优化，使2，4酚、对叔丁基苯酚形成联产生产工艺，降低了生产原料消耗和成本。     

高性能混凝土的尝试

针对普通混凝土耐久性差、寿命短等不足 ,结合实践试验 ,阐述了大掺量的粉煤灰制作高性能混凝土的试验方法 ,并对其试验效果进行了评析。指出了制作高性能混凝土的普遍可行性     

复合吸附剂提高催化裂化柴油安定性的研究

用改性活性白土吸附精制催化裂化柴油，精制后柴油的安定性得到显著提高。对精制后柴油的分析表明：复合吸附剂能够大幅降低油品中的总硫和碱性氮含量，对油品其它性质无大的影响。     

Copper(II) removal from aqueous solutions by fly ash

The removal of Cu(II) by adsorption on fly ash has been found to be concentration, pH and temperature dependent. The kinetics of adsorption indicates the process to be diffusion controlled. The Langmuir constants have been calculated at different temperatures, and the adsorption has been found to be endothermic (ΔH = 15.652 kcal mol^?1). The maximum removal is observed at pH 8.0, and variation in adsorption with pH has been explained on the basis of surface ionisation and complexation.     

焦化加热炉空气预热器腐蚀结垢与预防

空气预热器运行的好坏直接影响到加热炉的热效率 ,文章结合焦化装置加热炉空气预热器的使用、维修、改进等 ,论述了预热器存在的露点腐蚀问题。同时提出从设计、操作、设备等方面采取有效措施 ,保障预热器的长周期高效运行。     

爆破飞石的外弹道研究

本文利用现代外弹道数学理论，考虑了飞石的反弹作用和空气阻力作用，建立了飞石飞掷的数学物理模型，由此推导出爆破飞石飞掷距离计算公式。     

Modified oil agglomeration process for coal beneficiation. III. Grinding and agglomeration using different szego mill designs

The simultaneous grinding/agglormeration process has been used to beneficiate Minto coal. Experiments with the Szego Mill, a planetary ring-roller mill with grooved rollers, have given good results. Different roller ridge/groove sizes have been tested and favourable oil-coal-water ratios established. Ash removal is closely related to grinding performance. Very short mill residence times, of the order of 10 seconds, are sufficient for microagglomerate formation. Considerable equipment and operating cost savings are possible with the modified process.     

Study on high-strength composite portland cement with a larger amount of industrial wastes

It is one of important measures for the sustainable development of cement industry to utilize industrial wastes. High-strength composite portland cement with a large amount of granulated blast furnace slag (GBFS), fly ash and limestone was prepared by separate grinding method, optimizing gypsum and using activators. The total amounts of blending materials are between 45% and 65% and the strength grades of cements reach 525 or even 625 according to Chinese national standard for composite portland cement. Besides setting time and strength, the hydration heat, drying shrinkage and sulfate resistance were also determined.