新型序批式双外循环生物流化床流体力学特性研究

本文对一种可在同一设备中进行厌氧和好氧过程的新型双外循环生物流化床的混合特性进行了研究。包括进行厌氧过程的液固二相流化床和进行好氧过程的气液固三相流化床中不同载体及载体添加量对混合时间的影响。结果表明：无论在二相流化床还是在三相流化床载体的添加都会使液体的混合时间不同程度的缩短；使用活性碳做载体比使用沸石做载体混合时间稍短；混合时间短，可以用全混流反应器(CSTR)模型来描述外循环流化床反应器。     

Membrane protein folding on the example of outer membrane protein A of <Emphasis Type="Italic">Escherichia coli</Emphasis>

The biophysical principles and mechanisms by which membrane proteins insert and fold into a biomembrane have mostly been studied with bacteriorhodopsin and outer membrane protein A (OmpA). This review describes the assembly process of the monomeric outer membrane proteins of Gram-negative bacteria, for which OmpA has served as an example. OmpA is a two-domain outer membrane protein composed of a 171-residue eight-stranded -barrel transmembrane domain and a 154-residue periplasmic domain. OmpA is translocated in an unstructured form across the cytoplasmic membrane into the periplasm. In the periplasm, unfolded OmpA is kept in solution in complex with the molecular chaperone Skp. After binding of periplasmic lipopolysaccharide, OmpA insertion and folding occur spontaneously upon interaction of the complex with the phospholipid bilayer. Insertion and folding of the -barrel transmembrane domain into the lipid bilayer are highly synchronized, i.e. the formation of large amounts of -sheet secondary structure and -barrel tertiary structure take place in parallel with the same rate constants, while OmpA inserts into the hydrophobic core of the membrane. In vitro, OmpA can successfully fold into a range of model membranes of very different phospholipid compositions, i.e. into bilayers of lipids of different headgroup structures and hydrophobic chain lengths. Three membrane-bound folding intermediates of OmpA were discovered in folding studies with dioleoylphosphatidylcholine bilayers. Their formation was monitored by time-resolved distance determinations by fluorescence quenching, and they were structurally distinguished by the relative positions of the five tryptophan residues of OmpA in projection to the membrane normal. Recent studies indicate a chaperone-assisted, highly synchronized mechanism of secondary and tertiary structure formation upon membrane insertion of -barrel membrane proteins such as OmpA that involves at least three structurally distinct folding intermediates.     

理想约束的基本类型

许多一般力学文献中，对理想约束基本类型的阐述不够完整，有的甚至不够准确。本文给出了粗糙接触面约束的概念，并将约束分为内约束和外约束，在此基础上完整准确地阐述了理想约束的基本类型问题。     

反传网络(CPN)的改进及其在储层预测中的应用

反传网络（ＣＰＮ）是由Ｋｏｈｏｎｅｎ自组织特征映射和Ｇｒｏｓｓｂｅｒｇ外星网络组合形成的一种无指导混合分类器网络。本文尝试用反传网络对地震信息进行油气预测和分类。首先实现该网络的常规算法,然后对其进行了改进,最后利用这一算法对某油田的地震资料进行了ＣＰＮ网络的学习建模及油气预测计算,取得了较为满意的效果。     

具有递阶结构的多目标群决策方法

建立了一类上层单目标、下层多人无关联多目标的两层决策问题的数学模型，利用加权法把下层的多目标转化为单目标，形成一个下层多人无关联单目标的两层规划问题，采用外部逼近法解两层规划问题，从而获得原两层决策问题的最优解．该法为两层决策问题提供了一种求解途径．     

一种多人有关联两层多目标决策的交互式算法

本文首先建立了基于Ｓｔａｃｋｅｌｂｅｒｇ主从策略的多人有关联的两层多目标决策问题的数学模型，利用满意度和Ｋｕｈｎ－Ｔｕｃｋｅｒ条件把两层多目标规划问题转化为单层单目标非凸约束规划问题；并采用收敛外部逼近法求解此非凸约束规划问题的全局最优解，然后，通过分析人与决策人之间的交互，求得两层决策问题的满意解。     

两层多目标决策问题的理想目标法

本文建立了一类上、下层均为多目标的两层多目标决策问题的数学模型和决策机制，利用理想目标将其转化为等价的两层单目标规划问题，采用求解非凸优化问题的外部逼近法求解此两层单目标规划问题，从而获得两层多目标决策问题的满意解。     

汽车空气动力学计算问题初探

考虑到风洞设备昂贵，实验费用偏高等因素，必须从计算方法着手来模拟实验手段以来最低限度地减少实验工作量，可望达到缩短新车设计周期和降低实验费用的目的。     

基于理想目标的两层组织决策方法

首先建立了一类上层多目标，下层多人有关联单目标的两层决策问题的数学模型和决策机理，然后将其转化为等价的两层单目标规划问题，采用外部逼近法求解此两层单目标规划问题，以获得两层决策问题的满意解。     

不饱和聚酯温度指数和电性能的研究

从提高不饱和聚酯温度指数入手，对不饱和聚酯（ＵＰＥ）所用原料对其温度指数（ＴＩ）的影响进行了研究，同时还进行了树脂用固化剂的选择和固化工艺的优化，以得到良好的电性能．此外，对铜绿产生的原因进行了讨论，对树脂耐水性、贮存性及其电性能受温度的影响也进行了测试。