Y型纳米碳管的结构表征与光学性能研究

对Y型纳米碳管的形貌和超微观结构进行了SEM、HRTEM和XRD分析，并着重测试了其光学性能。结果表明，碳管内包裹Fe纳米微粒，管径分布在50～60nm之间；纳米碳管呈Y型是由于管内催化剂的粒度不均，使之在生长过程中产生分支；首次报道了产物的发光性能，认为其在红光范围内存在荧光效应。     

Optical Investigation of the Effects of Substrate Orientation on Oxidation of Single Crystal β-NiAl

The residual stresses in -Al₂O₃ scales formed on high-purity FeCrAl and FeCrAlY during oxidation at 1200°C and subsequent cooling and reheating were studied using photostimulated luminescence spectroscopy. Systematic measurements of the stress in the oxide were made as a function of both alloy thickness and cooling rate and the development of stresses in the oxide scale during thermal cycling was investigated as a function of the temperature. Depending on the ratio of the alloy and oxide-scale thicknesses, substantial stress relaxation was observed to occur during cooling at a rate of 8 K/min. Compressive growth stresses of 1 GPa were determined by comparing the residual-stress measurements at room temperature with those calculated based on thermal-expansion mismatch. No significant differences in the growth stresses, the total residual stresses, or the stress relaxation during thermal cycling were observed between the oxides formed on the Y-doped and undoped FeCrAl samples. Stress relaxation is also shown to lead to the development of tensile stresses in the oxide scale under certain conditions, in particular, those associated with slow cooling followed by rapid heating.     

Novel blue‐light‐emitting polymers based on a diphenylanthracene moiety

New luminescent copolyethers with diphenylanthracene‐emitting segments and electron‐transporting benzoxazole phenyl were successfully synthesized by aromatic nucleophilic substitution. The polymers, characterized by NMR and IR spectroscopy, were obtained in high yields, showed good solubility in various organic solvents, and had high thermal stability with high glass‐transition temperatures (125–129). The number‐average molecular weights of the polymers were 10,000–20,000, and they had polydispersity indices of 1.2–1.4. The optical and electrochemical properties of the polymers were also investigated. The pure blue emission for the polymers (maximum wavelength = 430–440 nm) was obtained with high photoluminescence quantum efficiency (76–78%) in a chloroform solution. The blue electroluminescence for the poly(TDPB) (maximum wavelength = 440 nm) was obtained with a turn‐on voltage of 15–20 V when simple light‐emitting diodes (indium tin oxide/polymer/Al) were fabricated. © 2006 Wiley Periodicals, Inc. J Appl Polym Sci 100: 2151–2157, 2006     

四官能环氧树脂的合成以及在覆铜板中的应用

对四官能环氧树脂[1,1,2,2-四(对羟基苯基)乙烷四缩水甘油醚]的合成与改性及在覆铜板中的应用作了初步探讨,并对其屏蔽紫外线与产生荧光的机理作用作了简单阐述。     

Analysis and tuning of adaptive generalized predictive control

The adaptive Generalized Predictive Controller (Clarke et al., 1987a, b) is capable of controlling plants with variable dead-time, unknown model orders and unstable poles and zeros. This paper shows how the GPC control law can be written in an equivalent general linear transfer function form which simplifies closed-loop (eg. root locus) analysis. Three recommended strategies for selecting the design parameters during the commissioning stage allow the user to adjust the closed-loop speed of response on-line using only a single active tuning parameter. Experimental runs confirm the ability of adaptive GPC to provide a consistent closed-loop response in spite of large process changes.     

工业过程的先进控制

在分析工业过程特点的基础上，总结了工业过程先进控制的发展现状，阐述了PID控制器参数整定和模型预测控制的基本概念和内容，讨论了工业过程先进控制的核心内容及其带来的可观的经济效益，并探讨了先进控制软件的产业化问题。     

2－芳基苯并噁唑的荧光猝灭和光诱导电子转移研究

本工作对两种不同的２－芳基苯并　唑化合物溶液荧光被四氯化碳所猝灭的机理进行了详细研究，通过多种途径研究表明该猝灭过程具有光诱导电子转移性质，工作还利用此电子转移所形成的活泼自由基来引发烯类单体的聚合，得到了有一定聚合度的聚甲基丙烯酸甲酯。     

适宜于光聚合过程应用的荧光探针研究

研究了两种探针化合物在安息香醚引发烯类单体光聚合反应中的应用，发现在光聚合反应中，不同的探针化合物有着不同的光谱响应特征和溶致变色行为，显然，这对探针的灵敏度会带来影响。实验结果表明：探针化合物在光聚合反应中能否应用，其光照稳定性起着关键作用，本工作推荐了一种适宜在烯类单体光聚合反应中应用的探针化合物。     

大面积水域浓度场测试方法及系统研究

针对大面积水域浓度场难以实现实时测量、测量精度不高等问题,采用了一种多通道荧光测试系统和方法。首先,基于单色光诱导荧光检测浓度(LIF)原理,使用探头获取离散点的浓度参数。然后,经总线或通信网络技术,将数百个测点连接起来。最后,通过数据总线或网络将采集的数据输送到中央测控计算机中,处理离散的数据后形成完整的浓度场。在恒定流浓度场中的试验结果表明,污染物测量相对误差均值不超过5%,单次测量相对误差最高值为8.33%,传感器线性度不超过5%,可检测的荧光素钠溶液浓度分辨率为0.001 ppm,系统测量稳定、精度较高。相较于其他浓度测量方法,该系统具有测量面积大、实时测量的优势,可为水污染防治等领域提供可靠的技术支撑。     

Adaptive receding horizon control for constrained MIMO systems

An adaptive control algorithm for open-loop stable, constrained, linear, multiple input multiple output systems is presented. The proposed approach can deal with both input and output constraints, as well as measurement noise and output disturbances. The adaptive controller consists of an iterative set membership identification algorithm, that provides a set of candidate plant models at each time step, and a model predictive controller, that enforces input and output constraints for all the plants inside the model set. The algorithm relies only on the solution of standard convex optimization problems that are guaranteed to be recursively feasible. The experimental results obtained by applying the proposed controller to a quad-tank testbed are presented.