赫尔穆特·亨特里希与HPP事务所

一 所有在今天见到赫尔穆特·亨特王希的人都会对这位年逾九旬,德高望重的老人留下极深刻的印象。他的记忆是整整一个世纪文化的缩影,一切事情在他的头脑中都依然历历在目,历史与人物,家庭与同事、童年与学校、莱茵河畔的家、战争与战后等等。他的言谈举止充满着温暖与善意,让人切身体会到哥德所说的“个性的优雅”。 亨特里希的祖父生于１８３５年,与辛克尔是同时代的人。亨特里希本人生于克雷菲尔德（Ｋｒｅｆｅｌｄ）的莱茵大街（Ｒｈｅｉｎｓｔｒａｓｓｅ）,这条大街是杜塞尔多夫建筑师瓦格德斯（Ｖａｇｅｄｅｓ）在１８１９年所…     

油气管道不停产带压开孔封堵的新技术

辽河油田设计院经过多年试验，最近研制出一套自带旁通筒式开孔封堵的新技术。该项技术于1996年4月通过了辽河石油管理局科技处组织的专家技术认定。它具有结构简单、体积小、重量轻、适用范围广、安全可靠等特点，可适应各种大小口径的管道、各种输送介质及各种管材，尤其对调油或高凝油及低温、高温管道更显其优越性。新研制的不停产带压开孔封堵技术主要包括有电动筒形开孔机、自带旁通筒式封堵机和管道开孔铁屑回收器及其配套的特制四向三通等辅助件。该套技术能实现等内径开孔接管；并能使开孔时切割下的原管料片在封堵时再放回原处复…     

二苯碳酰二肼的试制

二苯碳酰二肼CO(NHNHC_6H_5)_2在分析上有广泛的用途:如用以比色测定镉、汞、铅等金属离子;借显色反应定性检验镉、铬、铜、铁、汞等离子;在以汞量法测定氯化物及氰化物时用作吸附指示剂,及在滴定重铬酸盐时用作氧化还原指示剂等。是白色或浅玫瑰色的细小结晶,能溶于热酒精、丙酮、冰醋酸,微溶于热水,在醇中的溶解度为1:100,不溶于氯仿及乙醚。露置于空气中,慢慢变为粉红色,故须避光密闭保存。二苯碳酰二肼是由苯肼与脲素反应而成,反应式如     

水分析化学实验教学中常见问题剖析及对策

水分析化学是给排水科学与工程专业本科生的一门专业基础课,是专业认证评估要求中的核心课程之一。由于化学课程的实践性和应用性很强,该课程配套有相应的化学实验课程,有利于巩固学生对基础理论知识的理解。本科生在完成实验的过程中常常出现各种问题,在此,对于本科生在分析化学实验教学课程中的常见问题进行了较全面的剖析,并针对这些问题提出了改进措施和解决的办法。     

污泥固体停留时间对实时控制生物脱氮SBR中亚硝酸盐积累的影响

In this study,four sequencing batch reactors(SBR),with the sludge retention time(SRT)of 5,10,20 and 40 d,were used to treat domestic wastewater,and the effect of SRT on nitrite accumulation in the biological nitrogen removal SBR was investigated.The real-time control strategy based on online parameters,such as pH,dissolved oxygen(DO)and oxidation reduction potential(ORP),was used to regulate the nitrite accumulation in SBR. The model-based simulation and experimental results showed that with the increase of SRT,longer time was needed to achieve high level of nitritation.In addition,the nitrite accumulation rate(NAR)was higher when the SRT was relatively shorter during a 112-day operation.When the SRT was 5 d,the system was unstable with the mixed liquor suspended solids(MLSS)decreased day after day.When the SRT was 40 d,the nitrification process was significantly inhibited.SRT of 10 to 20 d was more suitable in this study.The real-time control strategy combined with SRT control in SBR is an effective method for biological nitrogen removal via nitrite from wastewater.     

人脸超分辨率网络(FSRNet)的改进

人脸超分辨网络(FSRNet)使用人脸几何先验信息优化人脸超分辨率,可以从低分辨率人脸图像生成逼真的高分辨率人脸图像,但FSRNet生成的超分辨率图像存在伪影.对其关键模块进行了改进,并引入了新的损失函数.直接输入16×16像素的低分辨率图像,最后使用转置卷积函数放大图像,降低了计算复杂度,提升了粗略超分辨网络的性能....     

Microstructure and mechanical properties of AZ31 alloy ingot fabricated by semi-continuous casting

The AZ31 alloy ingot with diameter of 110 mm and length of 3500 mm was fabricated successfully. The compositions and microstructure morphologies of the ingot at different locations were performed, which indicated that the chemical composition distributed homogeneously through the whole alloy ingot and the average grain size increased from the surface to the center. The results of the EDS and element face-scanning illustrated that the eutectic compounds mainly consisted of fl-Mg17Al12 and a small amount of fl-Mgl7（AlZn）12. Furthermore, slight improvements of the strength and ductility were observed from the center to the surface along the axial direction of the alloy ingot, while both the strength and elongation to failure of the samples along the radial direction are higher than that along the axial direction. The fine grain strengthening was the main contributors to the strength of the as-casted AZ31 alloy.     

生物除磷颗粒污泥去除Pb~(2+)的效能机制

以好氧颗粒污泥的吸附作用和磷酸盐对重金属的螯合作用为基础,采用富含磷酸盐的生物除磷颗粒污泥作为吸附剂来处理含铅废水,考察了不同吸附条件(pH、Pb~(2+)的初始浓度、吸附反应时间)下,颗粒污泥对Pb~(2+)的去除效果。结果表明,除磷颗粒污泥在pH为4,初始Pb~(2+)浓度为150 mg·L~(-1)时,对铅的去除率最高(为99.9%);在吸附反应20 min时即可达到吸附平衡。生物除磷颗粒污泥对Pb~(2+)的吸附可以用Langmuir模型拟合(R~2=0.993),最大吸附量为49.5 mg·g~(-1)。其中离子交换和磷酸盐与Pb~(2+)的螯合作用对除磷颗粒污泥去除Pb~(2+)起到重要作用;傅里叶变换红外光谱(FTIR)测定表明—COOH、—OH、磷酰基等多种官能团也参与了除磷颗粒污泥除Pb~(2+)过程。