在CeO2／SiO2催化剂上丁烯—1异构化动力学的内扩散影响

用外循环流动玻璃无梯度反应器研究了ＣｅＯ２／ＳｉＯ２催化剂上丁烯－１异构化动力学的内扩散影响。     

Density-based clustering method in the moving object database

With the rapid advance of wireless communication, tracking the positions of the moving objects is becoming increasingly feasible and necessary. Because a large number of people use mobile phones, we must handle a large moving object database as well as the following problems. How can we provide the customers with high quality service, that means, how can we deal with so many enquiries within as less time as possible? Because of the large number of data, the gap between CPU speed and the size of main memory has increasing considerably. One way to reduce the time to handle enquiries is to reduce the I/O number between the buffer and the secondary storage. An effective clustering of the objects can minimize the I/O-cost between them. In this paper, according to the characteristic of the moving object database, we analyze the objects in buffer, according to their mappings in the two-dimension coordinate, and then develop a density-based clustering method to effectively reorganize the clusters. This new mechanism leads to the less cost of the I/O operation and the more efficient response to enquiries.     

裂化催化剂再生过程中脱附热的研究

本文用微量差热天平(DTA-TG)和电子微量天平分别考察了裂化催化剂再生过程中焦炭和水的吸附-脱附作用。结果表明,焦炭脱附热为2350kJ/kg焦炭,占焦炭燃烧热的6.3％,比ESSO公司提出的11.5％低得多。在工业催化裂化过程中,催化剂在反应器和再生器之间循环运转时吸水-脱水量很小,对再生热效应计算的影响可以忽略,在工艺计算中可以不予考虑。     

~(15)N~(16)O~2Π_(3/2)态激光磁共振谱的标识

在大气物理过程和空气污染中,一氧化氮自由基分子起着重要作用,因此长期以来人们对它各种范围内的谱线进行了大量的研究,可见光谱、红外谱、电子顺磁共振谱以及激光磁共振(LMR)谱都有报道,这些研究结果积累成丰富的谱数据.     

Amorphous Alloy and Magnetic Stabilization Bed

Sponsored by NSFC,a research team led by Prof.Enze Min (CAS Member) from Research Institute of Petroleum Processing,through 20 years' effort,settled the puzzled grave issue that amorphous alloy material has small specific surface area and low thermal stability.     

FBD变换催化剂反应动力学Ⅰ.本征动力学研究

对低温活性好、抗硫能力强、机械强度高、热稳定性好、使用寿命长的FBD变换催化剂进行了本征动力学研究.采用等温积分反应器,在300～460°C、0.8～2.8 MPa、空速7 000～9 000h-1的条件下,测定了反应器出口气相各组分浓度.建立了幂指数形式的动力学方程,获得了反应的活化能及指前因子,该模型的计算值与实验值吻合良好.     

催化燃烧技术在垃圾焚化炉中的应用研究

本文对催化燃烧的基本原理、特点及催化剂的形式等方面进行了讨论,并就催化燃烧技术在垃圾焚化炉中实现的可能方法进行了探讨。     

呐咵醇重排反应的研究

太文报导了由2,3-二甲基丁二醇2,3、四苯代乙二醇和1,1′-联环己基二醇在Fe_2(SO_4)_3·xH_2O催化下,得到了重排产物,后者生成了酮和烯,并以烯烃为主。     

试论理工科合校

现代科学技术的发展,日益趋向综合化,学科之间的互相联系和互相渗透愈来愈密切,出现了许多边缘学科。工科可以为理科提供许多理论联系实际的应用课题,理科既可以为工科加强理论基础,又可以为工科的实验、定量分析、定性分析提供理论依据,也可以为工科的实验进行科学的理论概括,可见理工结合能相辅相成,相得益彰;再说要适应现代科学技术发展的需要,要发展边缘学科、系统学科、新兴学科,也要理工(乃至文理工)合校,才比较能够满足这种需要。我校自建校以来就是工科为主理工合校。本文着重从我校办学的经验和教训来论述理工合校的必要性和优越性…