基于DM642的红外图像处理系统的优化策略

提出了一种面向红外图像处理系统的优化设计方法。采用美国INFRARED-2500AS型红外探测器,以高性能数字媒体处理器DM642为核心搭建系统平台,对采集得到的红外图像进行图像插值、直方图均衡等处理,并通过视频编码器进行显示输出。在阐述了系统的体系结构和指令执行流程的基础上,从硬件和软件两方面介绍了相应的优化策略,包括系统电路设计的改进和存储器结构的调整,并利用DM642多媒体指令集等技术进行了代码优化。实验结果表明,经过优化的系统在速度和稳定性等方面均得到了明显的提高,可满足红外图像处理算法大数据量、高速传输、复杂运算的实际需求,并能够适用于野外较为恶劣的工作环境,可以在军事和民用等诸多领域发挥较大作用。     

基于分类信心重排序的中文共指消解研究

共指消解是自然语言处理的核心问题之一。本文针对分步消解中分类器全局信息的不足,依据分类信心对全体提及配对进行排序,优先根据可靠的分类结果对提及进行聚集或分离。实验表明,该算法在多个学习框架下显著地改善了系统的整体性能。     

壳聚糖-Zr(Ⅳ)配合物的制备及催化氧化降解的研究

对壳聚糖进行液态均相配合反应制得壳聚糖-Zr（Ⅳ）配合物, 通过AMF, IR, XRD及XPS等检测证实了壳聚糖与锆离子之间配位键的存在, 且显示壳聚糖在形成配位结构后存在有利于降解的优势构象. 以H2O2对壳聚糖-Zr（Ⅳ）配合物及壳聚糖进行氧化降解, 探讨相同条件下粘度的变化及降解产物的分子量分布. 结果表明, 壳聚糖-Zr（Ⅳ）配合物的降解速度明显高于壳聚糖, 降解产物分子量分布较壳聚糖直接降解窄, 进一步证明壳聚糖-Zr（Ⅳ）配合物中存在有利于降解的优势结构.     

一种基于数字水印的媒体自动识别技术

将日后需要用计算机进行识别的信息实现以水印的形式嵌入载体中，可以不影响载体感官效果，同时使得用计算机识别该载体内的特征信息变得简单可行。针对特定领域提出了实现该目标的一个模型，并给出了相应的算法。算法具有优良的性能，可以快速有效地满足识别要求，识别率很高，同时也满足了信息安全方面的要求。     

沙尘暴综合预报系统中场特征提取方法的研究

沙尘暴天气频繁发生,严重干扰和影响着人们的正常生活,对社会经济和生活环境均造成一定程度的危害.根据沙尘暴天气的成因及特点,在分析现有特征提取方法弊病的前提下,提出了ANN沙尘暴综合预报系统场特征提取方法.首先进行距平运算数据预处理,获取沙尘暴成因物理场样本;然后利用论文方法进行场特征提取.在此基础上,借助综合预报思想构建并实现了遗传ANN沙尘暴预测系统.仿真结果表明,论文所研究的场特征提取方法在提高沙尘暴预报的准确率方面做出了较大的贡献.     

Rough variables with values in measurable spaces

An X-valued rough variable is introduced as a measurable function from a rough space to a measurable space X. Based on the concept of X-valued rough variables, some properties of X-valued rough variables are studied. Furthermore, the concept of χ-convergence is presented, and χ-convergence of X-valued rough variables is discussed.     

Exploiting Temporal Relations in Mining Hepatitis Data

Various data mining methods have been developed last few years for hepatitis study using a large temporal and relational database given to the research community. In this work we introduce a novel temporal abstraction method to this study by detecting and exploiting temporal patterns and relations between events in viral hepatitis such as “event A slightly happened before event B and B simultaneously ended with event C”. We developed algorithms to first detect significant temporal patterns in temporal sequences and then to identify temporal relations between these temporal patterns. Many findings by data mining methods applied to transactions/graphs of temporal relations shown to be significant by physician evaluation and matching with published in Medline.     

真空管道TiN膜热出气率实验研究

简要叙述了小孔流量法测量材料出气率实验的原理和实验装置，给出了不锈钢溅射镀TiN膜在不同情况下的热出气率，并对影响不锈钢溅射镀TiN膜热出气率情况的各种因素进行了分析，为使用溅射镀TiN膜表面处理的储存环真空室的设计提供了依据。     

基于半导体制冷的动态不规则物体降温

目前便携式电子降温设备大多针对处于静态的对象。本文研究半导体对于具有不规则外表并可能实时变换空间位置的物体进行降温的可行性，试验综合考虑了储水箱的起始水温、水循环流量、风冷散热功率等因素，并提出了这类设备的适用范围。     

Take care! The evaluation of a team-based burnout intervention program for oncology care providers.

In this quasi-experimental study among staff of 29 oncology wards, the authors evaluated the effects of a team-based burnout intervention program combining a staff support group with a participatory action research approach. Nine wards were randomly selected to participate in the program. Before the program started (Time 1), directly after the program ended (Time 2), and 6 months later (Time 3), study participants filled out a questionnaire on their work situation and well-being. Results of multilevel analyses showed that staff in the experimental wards experienced significantly less emotional exhaustion at both Time 2 and Time 3 and less depersonalization at Time 2, compared with the control wards. Moreover, changes in burnout levels were significantly related to changes in the perception of job characteristics over time. (PsycINFO Database Record (c) 2010 APA, all rights reserved)