非中心轴对称光学谐振腔的特性

本文将矩阵法与衍射理论有机地结合起来,推导出非中心轴对称光学系统的传输矩阵,并给出此类光学谐振腔的高斯场分布,腔的稳定性判据及菲涅尔数计算公式。     

党建工作创新在学生素质教育中的作用探析

探讨了新时期高校青年学生党建工作在素质教育中的作用;探讨了在高校学生党建工作 创新中提高学生素质的具体做法及体会．     

IEEE 1149.7 CJTAG IP核复位与选择单元模块设计

在深入研究IEEE 1149.7标准基础上,针对测试问题,构建符合标准架构的测试目标芯片CJTAG IP核,重点介绍IP核中复位与选择单元(RSU)模块的设计实现.该模块主要实现了四大功能:确定芯片启动模式、产生复位信号、逃脱检测及选择序列产生、IP核在线或离线选择.基于Quartus Ⅱ应用平台设计,通过ModelSim完成仿真验证.仿真结果表明,该复位与选择单元模块产生的信号符合IEEE1149.7标准规定,能够支持目标芯片IP核实现相应的测试功能.     

新型中浓打浆系统(MCPA-ZDPS)的研制及应用

阐述了MCPA-ZDPS新型中浓打浆系统装备的组成、结构、特点与中浓打浆的实现方式及生产应用效果。生产应用表明:在质量分数为6%～15%范围内,选用MCPA型中浓浆泵(质量分数为8%～15%)与ZDPS型中浓液压双盘磨浆机组成的中浓打浆系统装备能更好地实现中浓打浆,显著提高纸浆纤维的纤维细化效果,使纤维分丝帚化,增强纤维间的结合力,并能较好保留纤维长度,与传统的低浓双盘磨的打浆系统装备比,成纸物理强度指标提高20%～35%,能耗降低30%～40%。     

Properties study and phylogenetic analysis of a bacterial strain with high de-emulsification efficiency

For further practical application,the phylogenetic analysis and de-emulsification properties study of strain XH1 with high de-emulsification efficiency isolated from crude oil contaminated soil in Daqing oil field were conducted with a surfactant-stabilized water-kerosene model emulsion. The factors influencing the de-emulsification efficiency and the generation site of de-emulsification active component of the strain were also investigated. The similarity of 16SrDNA sequences between strain XH1 and Bacillus mojavensis(DQ993678)was 99%. According to the physiological biochemical test,strain XH1 was preliminarily identified as Bacillus mojavensis. The logarithmic growth,stable phase and decline phase of strain XH1 were determined as 14,18 and 28 h,respectively. The best de-emulsification activity emerged after cultivating for 18h,and the complete de-emulsification was achieved at 24 h. The most favorable incubation conditions for de-emulsification occurred with pH of 6.0 at 30 ℃. The de-emulsification capability of strain XH1 was mainly resulted from extracellular metabolites. The above results indicate that strain XH1 has high de-emulsification efficiency and is potential as a commercial de-emulsifier.     

Features of the capacitance-voltage characteristics in a MOS structure due to the oxide charge

MOS structures based on p-and n-type silicon and subjected to the effect of voltages of both polarities with a magnitude as large as 70 V are studied. In all cases, an increase in the effective positive charge at the Si/SiO₂ boundary was observed. In the case of structures with p-Si, a steplike increase in the high-frequency capacitance in the inversion region at some value of the threshold voltage was observed. The increase in the capacitance and the threshold voltage were governed by the value of the effective charge and the area of the gate of the structure. The observed effect is accounted for by lateral diffusion of free electrons accumulated in the semiconductor in the vicinity of the gate contact. After completion of the effect of the voltage on the structures, the capacitance-voltage characteristics were recovered to the state close to the initial state in the relaxation time characteristic of reverse drift of ions and emission of charge carriers by tunneling from “slow” traps in the vicinity of the Si/SiO₂ interface.     

水轮机固定导叶和活动导叶的一种计算机辅助设计方法

本文提出了一种关于水轮机固定导叶和活动导叶的计算机辅助设计(CAD)方法,通过人机对话的方式,可以根据不同的电站参数设计符合要求的导水部件。实际编程设计结果表明,该方法设计速度快、准确度高,可以代替传统的作图设计法。     

柴达木盆地柴西与柴北缘地区凝析油气地化特征及其成因探讨

通过柴西与柴北缘地区凝析油气与烃源岩的地化特征对比,得出凝析油烃源岩为高成熟的烃源岩,柴西地区凝析气的母质成熟度要高于柴北缘地区。综合烃源岩与凝析油气的地化指标、包裹体测定温度、方解石年龄测定等因素得出：柴西凝析油气来自深层或邻近凹陷下第三系成熟-高熟的湖相烃源岩,成藏不晚于N1时期;柴北缘凝析油气来自深层或邻近凹陷下侏罗系成熟-过熟含煤湖沼相烃源岩,形成于N1初-N21初,成藏于N21时期或之后。