认知视角下罕见疾病诊断的改进

以认知心理学相关理论为基础,分析了罕见疾病的认知特征,建立了罕见疾病的诊断策略,提出了提高罕见疾病诊断能力的方法。     

属性层级模型的简介与述评

属性层级模型是一种基于统计模式识别和分类的认知诊断模型。根据已确定的属性之间的层级关系,属性层级模型可以将被试在试题上的反应模式即观察反应模式划归为期望反应模式,以此得到被试的知识状态,进而能够对被试进行有效的、有针对性的补救。作为规则空间模型的重要变种,属性层级模型同样克服了标准测验理论单维性和只重视作答结果而忽视作答过程的考察分析的不足,且逻辑性更强,促进了教育和心理测量学的发展和分析。     

医学影像处理存在的问题和展望

随着高性能计算技术与高精度探测技术的不断发展,医学影像辅助诊疗已经被医疗界广泛接受和采用,同时对医学影像的处理提出了更高的要求和挑战。简要介绍了医学影像处理技术的已有技术,并重点论述了该领域存在的主要问题,指出今后医学影像发展方向和趋势。     

催化重整故障诊断专家系统

针对炼油厂催化重整装置可能出现的常见故障,研制开发了一个用于催化重整故障诊断的实时专家系统．该系统由动态数据库、知识库、推理机、知识编辑器、解释器和人机接口等部分构成,知识库由带有可信度的产生式规则组成,推理机采用正向推理方法。     

浅析民航多普勒气象雷达在江西空管的应用

本文对民航江西空管分局新引进安装的多普勒气象雷达系统在运行中的应用经验进行了归纳总结。首先概述了该型雷达的主要特点,之后介绍了主要故障的判断处理方法,最后对日常维护提出建议,并介绍两个配套软件的使用以及相关应用程序的开发。     

Patterns of contingent teaching in teacher-student interaction

The present study aimed at investigating the process of scaffolding in a naturalistic setting with focus on a key aspect of scaffolding, namely contingency. Three Social Studies teachers in innovative prevocational schools were observed and interviewed. A coding scheme for the measurement of scaffolding was developed which revealed different patterns of contingent and non-contingent teaching amongst the teachers. In general these teachers of innovative schools showed little contingent teaching. Not adapting the support to students' current understanding and barely diagnosing the students' understanding appeared to be characteristic of this scarcity of non-contingent teaching.     

基于机车故障诊断的电路图形的动态显示的研究

在分析了巩车电路的特点基础上,选择了电路的通断信号对电路进行状态描述,采用了基于故障树的专家系统的故障诊断方法,设计并实现了整套的故障诊断系统以及电路图形的动态显示。实验结果证明该故障诊断系统方案是可行的,动态显示电路的设计是有效的.     

北京地区四所高校图书馆分馆运行现状调查分析

以实地调研为基础,从分馆的组建方式、建设规划和目标、文献资源建设、服务对象与内容、培训与监管等五个方面,对四所重点高校图书馆分馆的运行现状进行了梳理和比较分析,总结了可资借鉴的经验。     

原发性胆囊癌28例诊治体会

目的提高原发性胆囊癌的治疗效果.方法对我院近10年来28例胆囊癌进行分析.结果外科手术是治疗胆囊癌的有效措施.结论早期诊断是提高治疗效果的关键.     

Study of clinical features of amyloid angiopathy hemorrhage and hypertensive intracerebral hemorrhage

Objective: The purpose of this study was to differentiate between cerebral amyloid angiopathy (CAA) and hypertension (HTN) based on hemorrhage pattern interpretation. Methods: From June 1994 to Oct., 2000, 83 patients admitted to our service with acute intracerebral hemorrhage (ICH) were investigated retrospectively; 41 patients with his-tologically proven diagnosis of cerebral amyloid angiography and 42 patients with clear history of hypertension were investigated. Results: Patients with a CAA-related ICH were significantly older than patients with a HTN-related ICH (74.0 years vs 66.5 years, P<0.05). There was a significantly higher number of hematomas>30 ml in CAA (85.3%) when compared with HTN (59.5%). No basal ganglional hemorrhage was seen in CAA, but in 40.5% in HTN. In CAA-related ICH, su-barachnoid hemorrhage (SAH) was seen in 26 patients (63.4%) compared to only 11 patients (26.2%) in HTN-related ICH. Intraventricular hemorrhage was seen in 24.4% in CAA, and in 26.2% in HTN. Typical features o