系统资源参数对ORACLE8i数据库并行执行性能影响的研究

分析了系统资源参数对ORACLE8i数据库并行执行性能所带来的影响以及ORACLE内存参数和并行执行性能提高的关系,对每一种参数如何调整有利于系统性能的提高进行了理论分析,同时给出了实践结论.提出了并行执行环境下改善ORACLE8i数据库系统性能的技术思路和方法.     

Fe（PMαFP）3和Fe（PMαFP）（OX）2配合物的合成与性质

本文自论了在乙醇溶剂中,以三氯化铁同1—苯基—3—甲基—4—(α—呋喃甲酰基)吡唑啉酮—5(HPMaFP)及8—羟基喹啉(HOX)作用,制得两种配合物,并测得它们的组成为Fe(PMaFP)_3和和Fe(PMaFP)(OX)_2。研究了它们的红外光谱、紫外光谱、热稳定性等性质。观察了它们在常见有机溶剂中的溶解情况。在乙腈中的电导测定结果表明,这些配合物均为非电解质。     

FOUNDATION OF NUCLEAR ALGEBRAIC MODELS

Based upon Tomonoga-Rowe‘s many body theory, we find that the algebraic models, including IBM and FDSM are simplest extension of Rowe-Rosensteel‘s sp(3R).Dynkin-Gruber‘s subalgebra embedding method is applied to find an appropriate algebra and it‘s reduction chains conforming to physical requirement. The separated cases sp(6) and so(8) now appear as two branches stemming from the same root D6-O(12). Transitional ease between sp(6) and so(8) is inherently include.     

Novel rearrangement of purines

Summary 6-Trichloromethyl-9-methylpurine (1) rearranges to 6-dichloromethyl-9-methyl-8-oxopurine (2) in aqueous mild acidic solution. The rearrangement is rationalized in terms of a reaction involving protonation, covalent hydration, prototropic equilibrium and/or a hydride transfer. An alternative mechanism involving a positive halogen compound and hypochlorous acid as an intermediary is also proposed. Compound1 condenses with 4,5-diaminopyrimidine to give the purine-pyrimidine Schiff base pair4.Acknowledgments. We are deeply indebted to Professor S. Cohen of the Sackler School of Medicine, Tel Aviv University (Ramat Aviv, Isreal) for his advice and encouragement. Support of this research by the Israel Cancer Association, the Ber-Lamsdorf Foundation Switzerland Israel and by the Advancement of Mankind Foundation, is gratefully acknowledged. We thank Proff. D. Arigoni and A. Eschenmoser, ETH Zürich, for their valuable proposals and comments on the mechanism of the rearrangement.     

基于热红外遥感数据辽东地热区地表温度反演

为解决地热资源的勘探开发问题, 基于新型的 Landsat鄄8 热红外遥感数据, 采用大气校正法(RTE: Radiative Transfer Equation)反演出辽东地热区在 2014 年不同月份的地表温度, 并将反演结果中的高温异常区 与研究区内已知温泉点的空间分布特征进行对比, 结果表明, 两组数据在 8、 9 月份时具有很高的空间相关性。 该方法及结果对于探明辽东地热资源的空间分布及进一步勘探开发具有重要的指示意义。     

一种功能性轴向配位基的合成

二氧四胺大环(macrocyclic dioxotetraanine)配体因其独特的结构特点和性质而受到广泛的重视和关注.本文合成了一种溴代杂环8—溴代甲基喹淋,并作为功能性轴向给体侧臂成功地引入到十三员、十四员二氧四胺大环骨架上,发现喹啉侧臂的引入,改变了大环配体的配位环境并产生新的性质和功能     

8—羟基喹啉的亚硝基和硝基衍生物的合成

报道了以8-羟基喹啉为原料,合成5-和7-位的亚硝基和硝基衍生物。并做了差热分析和进行了讨论。