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item parameter
相关语句
  项目参数
     Ill-Conditioned Matrix Control Based on 2PLM Item Parameter Estimation
     基于2PLM项目参数估计的病态矩阵控制
短句来源
     New model of IRT item parameter estimation based on neural networks
     一种新的基于神经网络的IRT项目参数估计模型
短句来源
     Setting "shadow pool" in ISS was able to improve the uniformity of pool utilization. Finally,different distributions of the item parameter and different ability estimation methods affected the evaluation indices of CAT.
     并且不同的项目参数分布或不同的能力估计方法都对CAT评价指标有影响。
短句来源
     ITEM PARAMETER AND PERSON ABILITY ESTIMATE FOR CONTINUOUS IRT MODEL WITH CONNECTIONISM
     基于联结主义的连续记分IRT模型的项目参数和被试能力估计
短句来源
     The ANOTE program is utilized to estimate the original data and obtain the ability and item parameter.
     我们运用测量通用程序(ANOTE)对评分数据进行参数估计,最后得出被试能力参数和项目参数
短句来源
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  “item parameter”译为未确定词的双语例句
     Clinical Significance of Mensurating Platelet 4 Item Parameter in Hepatocirrhisis and Liver Cancer
     肝硬化和肝癌患者血小板四项参数的检测及意义
短句来源
     Item Response Theory (IRT) has some superiorities,such as item parameter invariance and more accuracy in estimation:But CTT is more convenient,while IRT is not yet fully mature,the two will develop hand in hand.
     而项目反应理论 (IRT)则有参数不变性的优点 ,并能给出不同水平被试的测量精度 . CTT有使用方便的优点 ,而IRT的理论体系尚需进一步完善 .
短句来源
     The consequence Proof: this kind of support of mutation each item parameter suit requirement.
     结果证明:各力矩符合回转支承的各项参数要求。
短句来源
     Objective Through observing diversification of platelet 4 item parameter,discussing its clinical significance.
     目的 :观察肝硬化和肝癌患者血小板四项参数的含量变化和临床意义。
短句来源
     Methods We used CD-1700 automatic leukocyte analysis instrument to mensurate platelet 4 item parameter in 79 patients who have been suffered from liver disease,then result compared with that in normal group.
     方法 :采用 CD- 170 0自动血细胞分析仪及配套试剂检测 79例肝病患者血小板四项参数 ,并与对照组比较。
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  相似匹配句对
     The Convergence of Parameter Estimation of IRT Scoring Item
     IRT评分项目参数估计的收敛性
短句来源
     Estimation of Item-Characteristic-Curve-Model Parameter
     项目特性曲线模型参数的估计
短句来源
     Scattering Parameter
     散射参数
短句来源
     n—Parameter CAPM
     n个参数的资本性资产定价模型
短句来源
     Summary of Construction Item
     浅谈建设项目后评价
短句来源
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  item parameter
It is shown that by using CML for item parameter estimation, some information is almost always lost.
      
Third, the impact of item parameter uncertainty on person estimates is considered.
      
Optimum examinee samples for item parameter estimation in item response theory: A multi-objective programming approach
      
The estimating error in the on-line ability values is accounted for with an item parameter estimate studied by Stefanski and Carroll.
      
This suggests that in applications that depend heavily upon the veracity of individual item parameter estimates (e.g.
      
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The item response theory (IRT) has been considered by some scho-lars as one of the three prime directions of current psychological measu-rement theory. In several respects it is more reasonable than the classi-cal test theory (CTT). This paper, using the 1986 data of the entrance-examinations of Teachers' Colleges in Shanghai, and taking the frame ofCTT, computes the indexes of five multiple-choice items in the mathem-atical papers of science students. Then, basing on IRT, the item charac-teristic...

The item response theory (IRT) has been considered by some scho-lars as one of the three prime directions of current psychological measu-rement theory. In several respects it is more reasonable than the classi-cal test theory (CTT). This paper, using the 1986 data of the entrance-examinations of Teachers' Colleges in Shanghai, and taking the frame ofCTT, computes the indexes of five multiple-choice items in the mathem-atical papers of science students. Then, basing on IRT, the item charac-teristic curves are plotted and the item parameters are estimated under-logistic models. Thus, a comparative study of the results of item-analysis is made. Some comments are made on the application of IRT and CTT inour practice.

项目反应理论(Item Resporse Theory IRT)被一些人认为是当代心理测量三大发展方向之一。在某些方面,它比经典测验理论(Classical TestTheory CTT)更为合理。本文利用1986年上海市师范类高等院校招生考试的理科数学试卷中选择题的实际考试资料,先用CTT计算有关题目指数,再用IRT对题目绘制题目特征曲线ICC(Item Charicteriotic Curve)并按Logstic模型对题目参数作出了估计,从而对题目分析结果作了对比研究。最后,本文对IRT与CTT在我国的运用、提出了若干看法。

Serum lipid was closely related to CHD on which great progresses had achieved through the studying for half a century.One of the pathogenic characteristics of cardio cerebral diseases in China was observed.The patients were over 4/5 cases of the aged CHD.Their multi item parameters of serum lipid were normal and serum total cholesterol(TC) was less than 2400mg/L.While their serum lipoprolein eleclrophorelogtam (SLPG) lesled by modified...

Serum lipid was closely related to CHD on which great progresses had achieved through the studying for half a century.One of the pathogenic characteristics of cardio cerebral diseases in China was observed.The patients were over 4/5 cases of the aged CHD.Their multi item parameters of serum lipid were normal and serum total cholesterol(TC) was less than 2400mg/L.While their serum lipoprolein eleclrophorelogtam (SLPG) lesled by modified digradient polyacrlamide gel electrophoresis in our Laboratory was often abnormal.Since the quality and quantity of subfractions of serum lipoprotein produced non hyperlipid abnormality. The SLPGand TC of 156 CHD of the aged were tested,in which men 81,women 75,mean age was 65.52±4.28 years.The relationship between 5 syndrome types and the dynamic imbalance of serum lipid proteins (SLP) was observed.The results were as flollws.Compared with the control group, the abnormal items of the observed groups showed significant differences (3 9 items).There were more abnormal items in the blood stasis group,the phlegm damp blood stasis group and the energy stagnation blood stasis group,the phlegm dmp blood stasis group and the energy stagnation group.The abnormal indes of SLP (SLPI)had the following order:phlegm dampblood stasis group (SLPI2.049)>energy stagnation blood stasis group (1.857)>blood stasis group (1.641)and phlegm damp group (1.545)>non phlegm damp blood stasis group(1.176)and the control group(0.056).The severer the phlegm damp blood stasis syndrome was,the higher the TC was (1754 2081.1mg/L),but the TCmean number was under the border level (2400mg/L). Thus,TC is not an ideal parameter for the dangerous agent about CHD of the aged,The SLPG of the aged CHD was showed significant abnormity and remarkably related to the defferentiated of phlegm damp blood stasis.Therefore if would play an important role in the diagnosis and treatment of the aged CHD in TCM.

本文对确诊冠心病(CHD)老年患者156例进行痰瘀辨证,并检测其血清脂蛋白谱(SLPG)和血清总胆固醇(TC)含量,观察5种证型与血清脂蛋白动态平衡紊乱的关系。结果表明:与对照组比较,各观察组间单项异常有显著差别,瘀血组、痰瘀组、气滞血瘀组显著多于无夹症组和痰浊组;SLPG异常指数顺序是痰瘀组>气滞血瘀组>血瘀组、痰浊组>无痰瘀组;随着痰瘀夹症加重,TC含量有增加趋势,但均值都小于2100mg/L,在临界水平以下[1]。可见对老年CHD危险因素而言,TC不是一个理想的指标;而SLPG有显著异常并且和痰瘀辨证的诊断明显相关,对老年CHD的诊治有重要价值。

By the methods of least square estimation,the tool of Moore Penrose qeneral invertible matrix and the same scale of measurement, the estimations of person(ability) parameters and item parameters(item difficulty parameter and item discrimination parameter) are provided in this article.

利用最小二乘估计方法和广义逆,在同一量尺上,同时给出题目难度参数、区分度参数、能力参数的估计

 
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