茶多酚在抑制板栗褐变中的应用

本研究比较了茶多酚同抗坏血酸和NaHSO3抑制板栗预煮褐变的效果．结果表明：茶多酚与柠檬酸和EDTA共用时，可以非常有效地抑制板栗预煮褐变，其效果明显优于抗坏血酸或NhHSO3与柠檬酸和EDTA共用的效果，并确定了预煮液的最佳配方为0.01％茶多酚 0.2％柠檬酸 0．2％EDTA．     

Effect of Manganese Doping on Oxygen Storage Capacity of Ceria-Zirconia Mixed Oxides

CeO2-ZrO2-MnOx mixed oxide series were prepared by sol-gel method. CO pulse and CO-O2 cycle measurements were carried out to examine the oxygen storage complete capacity （OSCC） and dynamic oxygen storage capacity （OSC） of the samples. The doping method brought about strong interactions between manganese oxide and ceria, both in the bulk and on the surface. Only a small part of Mn cations are incorporated into the ceria lattice to form solid solutions and the remaining are left on the surface as finely dispersed Mn3O4. The OSC behaviors of the materials are influenced by the doping amount of Mn and the solubility of Mn in the CeO2 lattice. The OSC is more easily affected by available contents of oxygen storage components when the measurement frequency is low. Comparatively, the concentration of lattice defects, which affects the mobility of bulk oxygen, is the determining factor under high frequency.     

广州中信商城地下连续墙施工工艺

本文介绍了广州中信商城地下连续墙的施工工艺。该工艺采用膨润土制浆配制方式，施工质量高，效果好。     

Partial functional deficiency of E160D flap endonuclease-1 mutant in vitro and in vivo is due to defective cleavage of DNA substrates

To assess the roles of the active site residues Glu160 and Asp181 of human FEN-1 nuclease in binding and catalysis of the flap DNA substrate and in vivo biological processes of DNA damage and repair, five different amino acids were replaced at each site through site-directed mutagenesis of the FEN-1 gene. The mutants were then expressed in Escherichia coli and purified using a His-tag. Even though the mutants bind to the flap DNA to different degrees, most of the mutants lost flap nuclease activity with the exception of an E160D mutant. This mutant retained wild type-like binding ability, specificity, and partial catalytic activity. Detailed steady state and pre-steady state kinetic analysis revealed that the functional deficiency of this mutant was due to retardation of the endonucleolytic cleavage. When the mutant enzyme E160D was expressed in yeast, it partially complements the biological functions of the homologous yeast gene, RAD27, and reverses the hyper-temperature lethality and hypersensitivity to methyl methanesulfonate, in a manner corresponding to the in vitro activity.     

开槽管状药内弹道模型及计算

该文根据开槽管状药的装药结构特点,建立两相流内弹道理论模型.在定义了开槽管状药的肉厚与槽宽的基础上,推导出形状函数,采用差分方法求解.计算结果表明,开槽管状药透气性好,点传火容易,压力波振幅小,计算结果符合膛内射击过程的变化规律.     

形成高压纳秒脉冲仿真线的设计

本文叙述了高低阻抗线和螺旋带传输线的设计原则，并利用这二种仿真线在同轴５０Ω负载上获得了快前沿的高压纳秒脉冲。实测结果表明，脉冲的上升时间小于０．４ｎｓ，宽度从１．６５～１０．６ｎｓ可变，幅值大于２０００Ｖ。     

驾车接近隧道过程中驾驶员瞳孔大小变化规律

为了解驾驶员驾车进入隧道过程中的瞳孔变化过程,让8位驾驶员分别驾车进入4座隧道,在此过程中用眼动仪记录驾驶员的瞳孔大小。分析眼动仪记录得到的驾驶员瞳孔大小数据的特征,通过小波变换进行数据处理,得到了驾驶员驾车进入隧道过程中瞳孔大小变化曲线。分析驾驶员瞳孔大小变化曲线发现,不同驾驶员的瞳孔大小存在个体差异;同一驾驶员多次测试的瞳孔大小存在一定的随机性;在接近隧道过程中驾驶员瞳孔逐渐变大,并在隧道洞口附近急剧变大;不同驾驶员的瞳孔变化趋势存在一定的差异;驾驶员瞳孔大小除受适应亮度的影响外,还受驾驶员的心理等因素的影响。     

考虑前馈作用的BTT导弹自动驾驶仪设计方法研究

针对BTT导弹自动驾驶仪的设计要求,文章提出了一种考虑前馈作用的导弹自动驾驶仪控制器设计方法。基于该型导弹三通道弹体数学模型,建立了自动驾驶仪控制系统数学模型。应用增益技术和递推设计方法,并基于过载稳定跟踪控制的设计要求,提出了一种全局非线性稳定控制策略,设计了连续的非线性自动驾驶仪,解决了该导弹俯仰通道的前馈问题;对于偏航通道,通过设计三通道协调控制律,将有前馈的自动驾驶仪设计问题转化为无前馈的设计问题;同时也利用滑模变结构控制原理解算出了横滚通道的舵偏角指令。数字仿真结果表明,所设计的自动驾驶仪控制系统可有效克服前馈问题所产生的稳态误差以及不确定性因素的影响,同时也提高了跟踪精度,并具有良好的动态特性和稳态品质。     

关于TAP6程序开发及应用

ＴＡＰ６是一个能求解稳态或非稳热传导的程序系统，可解热传导，对流换热，热辐射，热源等问题，又可作为ＳＡＰ６程序的前处理热分析程序，给出结构温度场供ＳＡＰ６进行热应力计算。     

基于智能工程的钟表CAD系统的研究与设计

基于智能工程的思想，提出了一种并行分层结构的集成化智能ＣＡＤ系统，并在钟表ＣＡＤ中得到成功应用，同时还首次将布局理论应用到钟表机芯设计中。