以中日韩自由贸易区为核心和先导的东北亚合作模式

2003年10月中日韩三国领导人在印尼巴厘岛《中日韩推进三方合作联合宣言》的签署之后，东北亚合作的问题日益成为人们关注的焦点，加强东北亚各国的合作不仅有利于促进亚太区域内各国经济的发展，促成亚太地区经济进一步崛起，还会化解东北亚各国之间的矛盾和冲突．东北亚的合作应当加强信任、走制度化的合作道路，创设以中日韩自由贸易区为核心和先导的东北亚合作模式．以次区域合作先行的模式来带动东北亚经济一体化的发展。     

1-(6-硝基-2-苯并噻唑)-3-(4-硝基苯)-三氮烯与镍显色反应的研究及应用

在TritonX-100表面活性剂存在下,研究了1-(6-硝基-2-苯并噻唑)-3-(4-硝基苯)-三氮烯(NBTNPT)与镍的显色反应.在pH为10.0～11.5的Na2B4O7-NaOH缓冲溶液中,该试剂与镍生成2∶1配合物.以500nm为参比波长,440nm为测定波长的双峰双波长进行测定,表观摩尔吸光系数为1.84×105L·mol-1·cm-1.Ni2+的浓度在0～280μg/L内符合比耳定律.用拟定方法测定钢铁中的微量镍,结果满意.     

不同卫星遥感数据镶嵌最优方法探讨——以ASTER和TM影像为例

以贵州省黔南州ASTER和TM影像为数据源,运用IMAGINE ERDAS V9.1软件为主要支撑,介绍不同影像的几何校正和拼接的基本原理和方法,使数据处理和应用达到优化,为影像收集困难地区开展遥感调查及应用提供新途径。     

Ab initio study of the effects of Ag/Mn doping on the electronic structure of LiFePO_4

Based on density functional theory (DFT) of the first-principle for the cathode materials of lithium ion battery, the electronic structures of Li(Fe1-xMex)PO4 (Me = Ag/Mn, x = 0―0.40) are calculated by plane wave pseudo-potential method using Cambridge serial total energy package (CASTEP) program. The calculated results show that the Fermi level of mixed atoms Fe1-xAgx moves into its conduction bands (CBs) due to the Ag doping. The Li(Fe1-xAgx)PO4 system displays the periodic direct semiconductor characteristic with the increase of Ag-doped concentration. However, for Fe1-xMnx mixed atoms, the Fermi level is pined at the bottom of conduction bands (CBs), which is ascribed to the interaction be-tween Mn(3d) electrons and Fe(4s) electrons. The intensity of the partial density of states (PDOS) near the bottom of CBs becomes stronger with the increase of Mn-doped concentration. The Fermi energy of the Li(Fe1-xMnx)PO4 reaches maximum at x = 0.25, which is consistent with the experimental value of x = 0.20. The whole conduction property of Mn-doped LiFePO4 is superior to that of Ag-doped LiFePO4 cathode material, but the structural stability is reverse.     

Theoretical study on the lithium bond interaction of furan homologues C_4H_4Y (Y=O, S) with LiCH_3 via DFT and MP2

The optimizations geometries and interaction energy corrected by BSSE of the complexes between C4H4Y (Y=O, S) and CH3Li have been calculated at the B3LYP/6-311 G** and MP2/6-311 G** levels. Three complexes were obtained. Abnormally, the calculations showed that all the C10—Li14 bond lengths increased obviously but the blue-shift of C10—Li14 stretching frequency occurred after formed complexes. The calculated binding energy with basis set super-position error (BSSE) and zero-point vibrational energy corrections of complexes I―III is ?45.757, ?35.700 and ?39.107 kJ·mol?1, respectively. The analyses on the combining interaction with the atom-in-molecules theory (AIM) also showed that a relatively strong lithium bond interaction presented in furan homologues C4H4Y---LiCH3 systems. Natural bond orbital theory (NBO) analysis has been performed, and the results revealed that the com- plex I is formed with n-σ type lithium bond interaction between C4H4O and LiCH3, complex II is formed with π-s type lithium bond interaction between C4H4O and LiCH3, and complex III is formed with π-s and n-s type lithium bond interactions between C4H4S and LiCH3, respectively.     

管理运行机制在大学生科技创新活动中的应用

文章主要探讨信息类本科专业人才在创新能力上的培养模式,解决人才培养中存在的“重理论、轻实践”问题,提出提高学生创新精神和实践能力的有效途径,建立了一套适合培养学生创新和管理的运行机制。     

高校学科文献资源的科学配置机制及管理体制研究

提出了高等学校实行学科文献资源科学配置的机理及原则,探讨了在网络环境下如何建立有核心竞争力的学科文献资源管理体制。     

移动通信系统安全机制发展的研究

从移动通信系统演进的角度介绍了安全机制的发展历程,分析研究了2G的安全性措施,阐述了3G认证签权方案及其优缺点,并对移动通信安全机制提出了一些见解。     

科技创新活动的模式与体制——以南京市为例

对科技创新活动的本质特点进行了探究,结合了南京市的实际情况分析了不同模式和体制对于该地区的适应性。     

采掘GIS数据库系统的研究

讨论了建立采掘GIS数据库的必要性,分析了采掘GIS数据库的建立过程,论述了数据库的空间分析和管理功能。