模的平坦根

本文引进模的干坦根概念，讨论了其性质，并对几类特殊环上模的亚干坦性进行研究．     

Research on Atomic-Scale Investigation of Li Storage Mechanism in Spinel Li4Ti5O12

Nowadays,there is an increasing need for large-scale energy storage with the developments of renewable energy sources including solar and wind power.Among the candidates,Li-ion batteries have been regarded as one of the most important alternatives to power the electric vehicles (EVs) and/or to store electric energy in largescale. Nonetheless,the performance of present Li ion batteries can still not meet the requirements for     

Mechanism of oxidative damage to DNA by Fe-loaded MCM-41 irradiated with visible light

The mechanism of oxidative damage to deoxyribonucleic acid (DNA) by iron-containing mesoporous molecular sieves (MCM-41) irradiated with visible light was elucidated. Fe-loaded MCM-41 (Fe/MCM-41) was used as a photocatalyst and the damage to calf thymus DNA caused by hydrogen peroxide (H2O2) was studied. The damage and extent of oxidation of DNA were measured by high-performance liquid chromatography (HPLC) and intermediate products were detected by HPLC/electrospray ionization tandem mass spectrometry. Electron spin resonance was used to detect changes in reactive oxygen species and peroxidase catalytic spectrophotometry was used to determine the concentration of H2O2. The results indicated that Fe/MCM-41 efficiently activated H2O2 in solution at pH 4.0-8.0 under irradiation with visible light. The photocatalytic system degraded DNA most effectively at pH 5.0-6.0 but also operated at pH 8.0. At pH 4.2, the degree of DNA damage reached 25.65% after 5 h and the kinetic constant was 5.89×10 2 min 1. Damage to DNA was predominantly caused by hydroxyl radicals generated in the system. The mechanism of DNA damage is of potential concern to human health because it can occur in neutral solutions irradiated by visible light.     

多媒体评估平台的设计与实现

由于不同的研究者和开发者都在采用自己的数字音频和视频处理技术，编码、解码技术和不同的操作系统，因而没有一个完整的能够将复杂的交互式多媒体表现、存储和交换组成一体的标准。为此，分析、比较了主要的媒体（JPEG，MPEG，ITU－H,ITU－G系列等）压缩算法的特性，在此基础上建立了一个基于客户机／服务器的网络多媒体评估平台，能够实时测试、显示相关媒体数据的特性参数，并可利用这些参数进行QoS控制。     

A nonmonotone line search filter method with reduced Hessian updating for nonlinear optimization

This paper proposes a nonmonotone line search filter method with reduced Hessian updating for solving nonlinear equality constrained optimization. In order to deal with large scale problems, a reduced Hessian matrix is approximated by BFGS updates. The new method assures global convergence without using a merit function. By Lagrangian function in the filter and nonmonotone scheme, the authors prove that the method can overcome Maratos effect without using second order correction step so that the locally superlinear convergence is achieved. The primary numerical experiments are reported to show effectiveness of the proposed algorithm.     

A traffic model of optical networks based on time-space complexity and traffic grooming

This paper researched the traffic of optical networks in time-space complexity,proposed a novel traf-fic model for complex optical networks based on traffic grooming,designed a traffic generator GTS(gener-ator based on time and space)with centralized+distributed idea,and then made a simulation in Clanguage.Experiments results show that GTS can produce the virtual network topology which can changedynamically with the characteristic of scaling-free network.GTS can also groom the different traffic andtrigg...     

模糊数的排序方法

针对不确定型的多属性决策问题，提出了关于区间数和模糊数序关系的赋值概念，给出了一种关于区间数和模糊数的赋值序关系方法，它具有良好的传递性和良好的直观性、实用性，并具有广泛的应用前景。     

桑车后制动鼓化学成份的控制

以德国大众汽车公司ＴＬ－ＶＷ０１１标准为依据，通过对１９９６年１～５月大量数据的类比分析、正态分析和回归分析等数理方法，寻找桑车后制动鼓的化学成份与机械性能、金相组织之间的关系，并严格控制熔炼工艺，从而使其金相组织、楔压强度、硬度的报废率从１４．３％降低至１．１１％．     

多组裂隙切割时块体顶煤的冒落失稳力学分析及应用

根据关键块体理论，讨论了多组裂隙的分布特征与块体顶煤的冒落失稳相关变化规律。结论是：裂隙倾角越大、裂隙组数越多、裂隙方位与煤壁夹角越小、裂隙间距和分层厚度越小，块体顶煤越易冒落；裂隙倾角越小，裂隙方位与煤壁夹角变化对块体顶煤的冒落影响越大；裂隙弱面陡立时（９０°），则裂隙方位与煤壁夹角变化对块体顶煤冒落无影响。     

西佛碱钴络合物对亚甲基的催化氧化研究

以西佛碱（Ｓｃｈｉｆｆｂａｓｅ）钴为催化剂与分子氧形成活化络合物，将亚甲基氧化羰基，考察了不同西佛碱结构氧化反应中的催化活性差异，并以Ｎ，Ｎ′－丙撑二（水杨叉亚胺）钴为催化剂，研究了由４，４′－双（二乙氨基）二苯甲烷制备４，４′－双（二乙氨基）二苯甲酮的氧化反应中，催化剂浓度，空气流速，反应温度，反应时间及溶剂等因素的影响，得到最佳反应条件。