含酮基团对煤焦异相还原NO的影响

基于量子化学密度泛函理论和过渡态理论研究了含酮基团对煤焦异相还原NO的影响及其产物发生氧脱附的微观反应机理。计算结果表明，NO更易于吸附在含酮基团煤焦表面。椅形含酮基团强化了煤焦异相还原NO；锯齿形含酮煤焦表面与NO异相反应决速步能垒值（495.45 kJ/mol）大于锯齿形纯碳基煤焦表面与NO决速步能垒值（331.32 kJ/mol），基于锯齿形含酮煤焦模型中的氧浓度不在利于NO还原的范围内而不易于NO的还原。中间产物P1在无CO存在情况下，较纯碳基煤焦表面更易于发生氧脱附而产生表面缺陷；在CO存在条件下，含酮煤焦表面为氧脱附过程提供自由活性位点，降低了过程能垒消耗。     

GEM状态转换在化学机械抛光设备系统中的应用

根据Generic Model for Communications and Control of Manufacturing Equipment (简称GEM)通讯协议的要求,分析了子状态、状态要求、状态转换的条件、触发状态转换的模块等;根据上述不同内容,选择不同的消息传递路径,最终实现GEM状态的转换,为设备端和主机端的交互提供了基本条件。     

基于改进遗传算法的软件项目人力资源调度研究

从软件项目人力资源调度的角度出发,构建了调度模型并利用改进型遗传算法对其进行求解,验证了该算法在求解资源调度问题中的可行性。     

基于逐点扫描的波前数据重构

提出一种对孔径网格逐点扫描重构波前的方法。该方法基于Hudgin模型,在孔径阵列的对角线上选取P个已知参考点。每个参考点都按行扫描计算得到一个波面,按列扫描又得到一个波面,这样P个参考点得到2P个波面,对这2P个波面求平均即为重构波面。对如何选择参考点进行了介绍,并说明选择高低坐标对称搭配的参考点为佳。建立了波面相位误差估算模型,并从理论上推出波面重构误差随参考点的增加而改善。对新方法进行了实验证验,与传统的矩阵求逆方法进行比较,结果表明,两种方法效果相当,但新方法计算量更小,具有较强的实用性。     

Quantum oscillation measurements in high magnetic field and ultra-low temperature

The physical properties of a solid are determined by the electrons near the Fermi energy and their low-lying excitations. Thus, it is crucially important to obtain the band structure near the Fermi energy of a material to understand many novel phenomena that occur, such as high-T_c superconductivity, density waves, and Dirac-type excitations. One important way to determine the Fermi surface topology of a material is from its quantum oscillations in an external magnetic field. In this article, we provide a brief introduction to the substation at the Synergetic Extreme Condition User Facility(SECUF),with a focus on quantum oscillation measurements, including our motivation, the structure of and the challenges in building the substation, and perspectives.