动态校正的PI型广义预测控制器及其在反应釜系统中的仿真研究

提出了一种新型的广义预测控制器。由于在控制器的设计中,进行了预测误差的动态校正,并且控制器采用了比例积分型(PI)目标函数,因此该控制器对未建模动态具有很强的鲁棒性。应用低阶的模型对一个强放热的化学反应釜模型进行的仿真研究检验了该方法的有效性。     

新型纳米纤维膜对地下水中重金属的过滤去除研究

采用扫描电镜表征了氯化聚氯乙烯静电纺丝纳米纤维膜的微观结构特征,并进行了去除地下水中铜、铅、镉等重金属阳离子的过滤试验,包括直接过滤、加土壤过滤、加硅藻土过滤和胶束强化过滤。结果表明,最佳的过滤工艺是胶束强化过滤,其最佳试验条件是10层膜过滤和5mmol/L的SDBS浓度,对铜、铅、镉的去除率分别超过73%,82%和91%。     

用超滤法处理回用生活污水

研究了用超滤法处理山西铝厂生活污水站出水的阻力特性及清洗可恢复性,通过试验对比了颗粒活性炭、微滤 颗粒活性炭和混凝进行处理污水后的超滤效果.试验结果表明,污水经微滤 颗粒活性炭预处理后,可以得到较好的过滤效果,过滤阻力低;用质量浓度为500mg/L的NaClO溶液反洗浸泡后可以得到较好的清洗效果;混凝可以去除悬浮物、胶体及污水中的部分有机物,明显降低了膜过滤阻力;超滤的产水水质符合生活杂用水标准GB JXX—2001的要求.     

发展生物技术 重视生态安全

论述了生物技术是现代科学发展与应用的结果，分析了在激素生产，新药品的开发，转基因动植物的应用，物种扩散与交流等方面所取得的主要成就，探讨了发展生物技术时应注意普及生物技术知识，做好安全性试验，重视社会伦理道德，立法及外来物种影响等问题。     

乳化液膜法净化湿法磷酸除镁研究

采用乳化液膜技术对湿法磷酸进行脱镁净化是一种净化湿法磷酸的新途径。采用正交试验设计方法组织实验，结果表明在实验研究范围内，萃取剂对湿法磷酸中脱镁效果有高度显著的影响，而表面活性剂、膜试剂和反萃取剂对镁的脱除有一定影响。     

Growth hormone signal transduction

Growth hormone (GH) promotes animal growth by stimulating bone and cartilage cell proliferation, and influences carbohydrate and lipid metabolism. Some of these effects are brought about indirectly via somatomedin induction in hepatocytes, others by acting directly on the target cells. In either case, GH first binds to specific receptors on cells to trigger a sequence of biochemical events culminating in a biological response. Recently much has been learnt about the molecular structure of GH receptor, its binding to ligand, and the ensuing signal transduction events.     

随机Benjamin-Ono 方程初值问题及对河口区域生物分布的应用

该文对具梯度耦合噪声的随机Benjamin-Ono 方程（以下简记为B-O方程）的初值问题导出了解得积分表达式，并将它应用于河口区域生物分布问题，得到了一维空间的分布表达式。     

The melatonin rhythm: both a clock and a calendar

The paper briefly reviews the data which shows that the circadian production and secretion of melatonin by the pineal gland can impart both daily, i.e., clock, and seasonal, i.e., calendar, information to the organism. The paper summarizes the 3 patterns of nocturnal melatonin production that have been described. Clearly, regardless of the pattern of nocturnal melatonin production a particular species normally displays, the duration of nightime elevated melatonin is proportional to the duration of the night length. Since daylength under natural conditions changes daily the melatonin rhythm, which adjusts to the photoperiod sends time of year information to the organism. The melatonin receptors which subserve the clock message sent by the pineal gland in the form of a melatonin cycle may reside in the biological clock itself, namely, the suprachiasmatic nuclei (SCN). The melatonin receptors that mediate seasonal changes in reproductive physiology are presumably those that are located on the pars tuberalis cells of the anterior pituitary gland. Besides these receptors which likely mediate clock and calendar information, melatonin receptors have been described in other organs. Interestingly, the distribution of melatonin receptors is highly species-specific. Whereas the clock and calendar information that the melatonin cycle imparts to the organism relies on cell membrane receptors, a fact that is of some interest considering the high lipophilicity of melatonin, recent studies indicate that other functions of melatonin may require no receptor whatsoever.     

高压电机起动的饱和电抗器设计

介绍高压电机起动用饱和电抗器参数的选择及设计方法，并给出了具体例子。     

生物滴滤塔净化中低浓度H2S气体的挂膜实验研究

本文通过对两种填料处理硫化氢气体的挂膜实验研究,表明挂膜方法、填料性能、温度、PH值、入口浓度等均影响挂膜效果与硫化氢去除率,并且得出陶粒挂膜启动时间比阶梯环快。