一种应用于嵌入式系统中断控制IP核的研究

探讨了C＊Core嵌入式系统的中断处理机制，研究了一种应用于该系统的中断控制器IP核——INTC。INTC具有中断响应快，中断处理方案多样的优点，适用于中断延迟要求较高的实时嵌入式系统。     

一种改进的设备故障诊断方法

提出了一种新型故障诊断的粗糙集方法.在粗糙集知识系统中信息熵概念基础上,重新定义了一种信息熵度量方法,并运用信息熵判断系统状态:基于粗糙集优越的约简理论,运用一种改进的区分矩阵方法形成一种综合策略的诊断规则.该方法有效地解决随机误报以及信息丢失和信息不完备情况下仍保持着较好的诊断性能,并降低了计算复杂度,减少了计算开支.     

Efficient Luminescence from Rare‐Earth Fluoride Nanoparticles with Optically Functional Shells

Rare‐earth fluorides are a class of materials with considerable potential in optical applications. Fluoride lattices typically permit high coordination numbers for the hosted rare‐earth ions, and the high ionicity of the rare‐earth‐to‐fluorine bond leads to a wide bandgap and very low vibrational energies. These factors make rare‐earth fluorides very useful in optical applications employing vacuum ultraviolet and near‐infrared excitation. The preparation of nanometer‐sized particles has opened the door for new properties and devices if the performance of their macroscopic counterparts can be conserved in the nanometer regime. However, at small particle sizes, defect surface states and adhering water reduce the optical efficiency. These shortcomings can be reduced by applying protective shells around the luminescent cores, which can also be involved in the luminescent process.     

The effect of the polymerization route on the amount of interphase in structured latex particles and their corresponding films

Three series of hard/soft styrene-acrylic latex based systems with equivalent compositions were prepared either by blending of homopolymer latexes or by preparing structured latex particles having core shell (CS) or inverted core shell (ICS) morphologies. Transmission electron microscopy (TEM) was used to investigate the particle morphologies, which were correlated to the calculated fractional radical penetration for the propagating species during the reactions. The thermo-mechanical properties as well as the morphology of the resulting latex films were analyzed by differential scanning calorimetry (DSC), dynamic mechanical analysis (DMA) and TEM. The viscoelastic properties of the interphase between the first and second-stage polymers formed in the structured hard/soft latex films, as well as its qualitative amount and also the film morphologies were found to depend on the interplay between thermodynamic and kinetic parameters during the synthesis of the samples.     

Win-win initiatives

This paper explores the use of win-win initiatives as a means of making safety improvements while simultaneously reducing plant operating costs. A two-phased process for implementing these initiatives is provided. Near-term progress is emphasized in the first phase by using presently available information. The second phase addresses complex issues such as closure in the regulatory process, modernizing the role of determinism in decisionmaking, closer coupling of performance-based regulation and risk-informed regulation, modernizing the testing of important plant equipment, and the treatment of uncertainties.     

Membrane Behavior of Two Backfills from Field-Constructed Soil-Bentonite Cutoff Walls

Two soil-bentonite cutoff-wall backfills obtained from construction sites, one in New Jersey and one in Delaware, were tested for the existence of membrane behavior. Both backfills were designed as a mixture of dry bentonite (3–4% by dry weight) and the locally excavated soil blended with bentonite water slurry to provide slumps ranging from 100 to 150?mm (from 4 to 6?in.). The results of the membrane tests indicate that both backfills exhibit membrane behavior. Further, the magnitude of the membrane behavior increases with decreasing void ratio. However, the magnitude of the increase in membrane behavior in these construction-site backfills was lower than that previously reported for model backfills prepared in the laboratory. The difference in the membrane behavior is attributed, in part, to a lower percentage of clay in the construction-site backfills relative to the model backfills. Nonetheless, based on the measured membrane efficiencies for the two field-constructed backfills, the total liquid flux (q) through the cutoff walls can be expected to be reduced relative to that in the absence of membrane behavior (qh) by 1–10% for the cutoff wall in Delaware and 7–8% for the cutoff wall in New Jersey, depending on the void ratio. Thus, the results of this study suggest that membrane behavior in field-constructed cutoff walls can be significant, depending on the void ratio and the clay content of the backfill.     

大功率电子辐照加速器扫描磁铁芯管的研制

扫描磁铁芯管的研制是大功率电子辐照加速器引出系统的关键技术之一,本文详细叙述了扫描磁铁芯管的选材、结构设计和加工工艺,并利用有限元方法对芯管壁面加强筋的形状及位置进行了优化,对芯管的焊接工艺进行了总结归纳,最终保证该芯管在大功率烟气脱硫加速器上使用时状况良好.