ITIL理念在IT技术服务上的研究与应用

传统IT服务部门在IT服务工作中存在的无序、效率低下、无法量化考核等同题。本文结合ITIL理念．有针对性地为IT服务部门提出了一种新的IT服务管理的解决方素。并结合工作实际。设计开发了一套行之有效的基于工作流的办公自动化系统。     

Spectroscopy Study on Crystal Structure of Ce（NO3）3 （phen）2 and Interactions of Ce（NO3）3 （phen）2 with DNA

Inrecentyears ,Komiyaetal.[1] havefoundthatrareearthsionsmaybeoneofthestrongestcutre agentsofnucleicacids .Theexperimentalresults ,thatrareearthsrepresscancersonwholeanimalbodiesandonhumanbodies(invitro) ,indicatedthatrareearthselementsactuallyhavestrongf…     

Synthesis, characterization and DNA binding of the complexes of rare earth with phenanthroline and demethylcantharate

Three novel rare earth complexes, [Ln2(DCA)2(phen)2](NO3)2·6H2O (Ln(III)=Sm(III)(1), Er(III)(2), Yb(III)(3); DCA2-=de-methylcantharate, 7-oxabicyclo[2.2.1] heptane-2,3-dicarboxylate, C8H8O52-; phen=1,10-phenanthroline, C12H8N2) were synthesized. The structures were characterized by elemental analysis, molar conductance, IR and TGA. The results suggested that the structural features of the complexes were: in each DCA2-, one carboxylate group, as bidentate bridging group, connected two rare earth ions; the other carboxylate group, as bidentate chelate group took part in the coordination with rare earth ion. And cyclic ether oxygen of DCA2- and nitrogen atoms of phen took part in the coordination. The probable coordination number was seven. The interaction of the complexes with DNA was studied by UV-spectra, fluorescence spectra and viscosity measurements. Following increasing the concentration of DNA, the UV absorption bands nearby 265 nm of the three complexes appeared hypochromism and red-shift phenomena. And the values of binding constants Kb were 1.89×105 L/mol (1), 3.54×104 L/mol (2) and 3.83×104 L/mol (3). The complexes could quench the fluorescence of EB-DNA system, and the values of equilibrium constants Ksq were 1.72(1), 0.56(2) and 1.09(3). The relative viscosity of DNA steadily decreased with increasing the concentration of complexes. So, we could infer that the complexes may partially insert into DNA. The study of agarose gel electrophoresis showed that the complexes could cleave plasmid DNA, and the process of the reaction was through unclassical redox mechanism.     

抛光用Ce1-xZrxO2粉末合成工艺的优化及其性能

用共沉淀法、NH3·H2 O为沉淀剂 ,利用正交实验法对合成抛光用Ce1 -xZrxO2 粉末的工艺进行了优化 ,结果得出 :以nZrO(NO3) 2 ∶nCe(NO3) 3=3∶5 0的混合料液为原料 ,无水乙醇为分散剂 ,70 0℃煅烧可得粒度均匀、且中位粒径约 0 .45 μm的混合粉末。经激光粒度仪、XRD ,TG ,比表面积测定仪、拉曼光谱仪对优化工艺合成的Ce1 -xZrxO2 粉末的粒度、物相、热稳定性、比表面积、拉曼特征峰等进行了表征 ,同时用抛光机和表面粗糙度测试仪对用此粉末抛光后的玻璃进行了测试 ,证明抛光效果良好     

硫酸铵—1—（2—吡啶偶氮）—2—萘酚—磺酸—Tween80体系萃取分离铁

研究了硫酸铵－１－（－２－吡啶偶氮）－２－萘酚－Ｔｗｅｅｎ８０体系萃取铁的行为。试验表明,当溶液ＰＨ２．０～４．０能使Ｆｅ（Ⅱ）与Ｚｎ（Ⅱ）与Ｚｎ（Ⅱ）,Ｃｄ（Ⅱ）、Ｍｎ（Ⅱ）、Ｍｇ（Ⅱ）、Ａ（Ⅲ）定量分离。应用该计测定了铝铪合金中Ｆｅ的含量,结果满意。     

Synthesis,crystal structures of novel complexes of rare earth with norfloxacin,interaction with DNA and BSA

Three novel rare earth complexes [N(CH 3) 4 ][Ln(NF) 4 ]·6H 2 O(Ln=Nd(III)(1),Sm(III)(2),Ho(III)(3)) were synthesized using hydrothermal method from norfloxacin HNF=1-ethyl-6-fluoro-1,4-dihydro-4-oxo-7-(1-piperazinyl)-3-quinoline carboxylic acid,C 16 H 18 FN 3 O 3),imidazole and rare earth nitrates.The complexes were characterized by elemental analysis,FT-IR,TG-DTG and X-ray single crystal diffraction.Each rare earth ion was eight-coordinated with carboxyl-O atoms and keto-O atoms from norfloxacin.Four of the norfloxacin ions acted as bidentate chelate group took part in the coordination with rare earth ion.The structures of complexes were tetragonal system with space group I4 1 /acd,which were allomerism.The interaction between complex 1 and DNA was studied by electronic absorption spectra and fluorescence spectroscopy.The binding interaction between the complex 1 and bovine serum albumin(BSA) was studied by fluorescence spectroscopy.The complex 1 bound to DNA by the mode of partial intercalation.Complex 1 had a strong ability to quench the fluorescence from BSA.The complex interaction was mainly a static quenching process with BSA together with formation of two binding sites.     

CCD相机驱动电路设计和信号处理技术研究

介绍了一种CCD相机前端电路的软硬件设计与实现.对CCD时序驱动电路和信号处理电路进行了分析,对拖影(Smear)处理等难点问题进行了讨论,并介绍了针对Bayer彩色滤波阵列的彩色图像还原方法,给出了处理结果.     

聚丙烯酸树脂吸液性能的条件探讨

本实验采用溶液聚合法,以丙烯酸（AA）和丙烯酰胺（AM）为单体,氢氧化铝作为交联剂,过硫酸钾为引发剂合成高吸水性树脂,并探讨了单体丙烯酰胺与丙烯酸的配比率、丙烯酸的中和度、交联剂用量、聚合温度、引发剂对高吸水树脂吸液性能的影响.结果显示当丙烯酰胺和丙烯酸单体的配比率0.3～0.4,丙烯酸的中和度60 ％～70％,交联剂的用量约占单体0.03 ％～0.05％,引发剂用量约占单体的0.2％加.3％,聚合温度为55～60℃时,合成树脂的吸水倍率达最大,为995.35 g/g.     

基于FPGA的CCD相机自动增益控制方法及实现

为扩大CCD数字相机成像的动态范围,需要调整信号增益.给出了增益控制的控制量、可控对象、控制算法.对基于均值、直方图的控制方法进行了对比分析,提出了基于两种方法相结合的算法,并在XILINX公司的SPARTAN3系列FPGA上实现了控制算法.最后给出增益控制的实际效果图,验证了控制流程的正确性和有效性.     

水杨酸锰的热分解机理及纳米氧化锰形貌

用流变相-前驱物反应法合成了水杨酸锰配合物.通过元素分析和TG分析确定该配合物的组成为Mn(HSal)2·2.5 H2O(HSal=o-OHC6H4COO);XRD确定该配合物为单斜晶系,晶胞参数为α=1.893 5(4)nm,b=0.617 9(0)nm,c=1.732 5(6)nm,β=114.93(1)°,V=1.838 2(3)nm3,Z=6,ρcal=1.775 kg/dm3,ρexp=1.769 kg/dm3;IR研究表明配合物中羧酸根与Mn2 以双齿螯合方式配位.样品在氮气中经330℃热分解的最终产物是MnO和有机化合物,在空气中经800℃热分解的最终产物为Mn3O4.TEM观察表明,MnO和Mn3O4均为球形粒子,平均粒径分别约为25和28 nm;激光粒度分析仪测定MnO和Mn3O4的平均粒径约为45.6和69.1 nm.