在常规故障下具有四个部件冗余系统解的最优控制

研究了具有常规故障的四个部件冗余可修复系统模型.将一组微分-积分方程描述的模型转化为六维空间的积分方程形式.运用算子理论,证明了此系统非负解的存在唯一性.并且研究了以范数为指标衡量控制标量为标准的最优控制问题.     

一类幂等半环上线性方程组的解法

极大-极小-加系统规划的全局优化可用于通信网络、柔性制造、对策博弈等实际系统,而幂等半环上线性方程理论在极大-极小-加系统规划的全局优化的研究中起着关键的作用.对于一类幂等半环上的非齐次线性方程组,引入列满秩矩阵与控制向量概念,并分别给出解的存在性和惟一性充分必要条件以及求解方法.     

聚丙烯微孔膜表面的空气等离子体处理

采用空气等离子体对聚丙烯微孔膜进行了处理，膜表面带有了氧元素，表面亲水性增强。微孔膜外表面改性程度较高，而孔内愈往深处改性程度愈弱。空气等离子体处理过的微孔膜力学性能下降。     

微波辅助合成发光可调ZnS∶Cu纳米晶

以巯基丙酸(MPA)为稳定剂,利用微波辐射加热方法制备了水溶性的Cu掺杂的ZnS纳米晶.通过改变微波条件,可以在460~572nm之间实现对ZnS∶Cu纳米晶发射峰位的连续调控.通过XRD、UV-Vis、荧光及荧光衰减对ZnS∶Cu纳米晶的结构和发光性质进行了详细探索,并利用时间分辨荧光光谱对其发光机理进行了初步研究,     

纳米SnO2@TiO2的制备及其光催化性能

以SnCl4和Ti(OBu)4为原料,采用活性层包覆法制备了SnO2@TiO2包覆型复合光催化剂,并用XPS、IR、XRD、TEM和BET等手段进行了表征,以二甲基二氯乙烯基磷酸酯（简称DDVP）稀释液为模拟废水,考察了SnO2@TiO2的光催化活性及降解液初始浓度对反应动力学的影响.结果表明：包覆粒子由锐钛矿型TiO2和金红石型SnO2组成;与纯SnO2、TiO2相比,SnO2@TiO2包覆粒子的光催化活性明显提高,DDVP稀释液被光催化降解属于零级反应,但反应表观速率常数与降解液初始浓度成正比.     

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HL-2A装置MHD不稳定性实时预测破裂系统采用了一种简单有效的方法来预测MHD不稳定性导致的等离子体大破裂。利用Mirnov线圈探测MHD信号,根据信号的振幅或频率特点设定计算方法,来预测等离子体破裂先兆,然后用激光吹气注入杂质来缓解等离子体破裂。研究结果表明,该系统能够实时预测破裂先兆,按量注入杂质后,可达到破裂缓解目的。     

Impurity Activation in MBE-Grown As-Doped HgCdTe by Modulated Photoluminescence Spectra

Modulated photoluminescence spectra have been performed to investigate the impurity activation in MBE-grown As-doped Hg1-xCdxTe （x ≈ 0.3）. The results show that the doped As mainly acting as donors in the as-grown samples can be fully activated as AsTe by two-stage anneals of 285℃/16 h ＋ 240℃/48h, of which the ionization energy has been determined to be about lO.5 meV, slightly smaller than that of intrinsic VHg （about 14.5 meV）. However, the higher activation temperature （e.g. 400℃） at the first-stage can produce large numbers of excessive VHg and seriously deteriorate the quality of epilayers. This couM give a brief guideline for preparing extrinsic p-type HgCdTe materials or devices.     

用表面等离子体子共振传感器测定人心肌肌钙蛋白I的研究

采用自组装表面等离子体子共振(SPR)传感装置,固定入射角,以波长为变量,以CCD为检测系统,用对金和抗体均有较强吸附作用的葡萄球菌A蛋白作为基底膜,观测了人心肌肌钙蛋白I的抗体和抗原之间免疫反应的动力学过程,并进行了人心肌肌钙蛋白I的定量测定.结果表明,人心肌肌钙蛋白I的浓度在5.0～50μg/L范围内与传感器的响应值呈线性关系.     

纳米SnO_2@TiO_2的制备及其光催化性能

SnCl4和 Ti(OBu)4为原料,采用活性层包覆法制备了 SnO2@TiO2包覆型复合光催化剂,并用 XPS、 IR、 XRD、 TEM和 BET等手段进行了表征,以二甲基二氯乙烯基磷酸酯（简称 DDVP）稀释液为模拟废水,考察了 SnO2@TiO2的光催化活性及降解液初始浓度对反应动力学的影响 .结果表明：包覆粒子由锐钛矿型 TiO2和金红石型 SnO2组成;与纯 SnO2、 TiO2相比, SnO2@TiO2包覆粒子的光催化活性明显提高, DDVP稀释液被光催化降解属于零级反应,但反应表观速率常数与降解液初始浓度成正比 .     

Study of runaway electron behaviour during electron cyclotron resonance heating in the HL-2A Tokamak

During the current flat-top phase of electron cyclotron resonance heating discharges in the HL-2A Tokamak, the behaviour of runaway electrons has been studied by means of hard x-ray detectors and neutron diagnostics. During electron cyclotron resonance heating, it can be found that both hard x-ray radiation intensity and neutron emission flux fall rapidly to a very low level, which suggests that runaway electrons have been suppressed by electron cyclotron resonance heating. From the set of discharges studied in the present experiments, it has also been observed that the efficiency of runaway suppression by electron cyclotron resonance heating was apparently affected by two factors: electron cyclotron resonance heating power and duration. These results have been analysed by using a test particle model. The decrease of the toroidal electric field due to electron cyclotron resonance heating results in a rapid fall in the runaway electron energy that may lead to a suppression of runaway electrons. During electron cyclotron resonance heating with different powers and durations, the runaway electrons will experience different slowing down processes. These different decay processes are the major cause for influencing the efficiency of runaway suppression. This result is related to the safe operation of the Tokamak and may bring an effective control of runaway electrons.