认知诊断测验编制的理论及方法

认知诊断测验的优劣直接影响诊断的效果及质量。与传统测验相比,认知诊断测验在测验目的和功能、测验编制的理论基础以及测验项目质量的评价标准方面均存在不同。本文梳理了目前国内外几种认知诊断测验编制的相关理论及方法,并提出了认知诊断测验编制的基本过程,即确定诊断目标→构建认知模型→认知诊断测验项目设计→项目编写→项目测量学参数获取→测验组卷,为认知诊断测验的编制研究者及实际编制者提供一定的参考和指导。     

积极应对考生低龄化对自学考试的影响

高等教育自学考试考生低龄化对自学考试产生了积极影响,又给其带来了新的挑战。为确保高等教育自学考试的健康发展,需要从培养目标、规范社会助学、加强德育工作、加强就业引导等方面予以积极应对。     

加强实验项目教学,提高高校实验室利用率

从实验项目入手,是提高高校实验室利用率的有效方法。项目式实验教学可以提高学生自主学习、自主创新的能力,是综合技能和综合素质提高的重要培养方式,也是当前实验教学改革的重要方面。     

工程质量监督工作改革创新实践探索

根据江苏省建设工程质量监督工作实践,提出应对工程建设规模与工程质量监督资源不足矛盾的六大重点改革措施,即"突出重点,全面提高监管水平;不断探索,创新监管方式;齐抓共管,提高监管效能;完善机制,加强监管队伍建设;与时俱进,推进质监信息化建设;更新观念,推行精品工程战略."     

西宁电视塔工程钢结构焊缝的施工质量控制

焊缝质量的优劣是影响整个钢结构施工质量的重要因素,也是钢结构施工及监理中需要重点关注的问题.文章结合西宁电视塔工程,从监理前期和构件加工制作报价阶段以及安装过程,从材料质量控制、安装工序、焊接工艺等方面,探讨了钢结构施工过程中的焊缝质量控制.     

Effects of dietary supplementation with Clostridium butyricum on the growth performance and humoral immune response in Miichthys miiuy

The effects of dietary supplementation with Clostridium butyricum on growth performance and humoral immune response in Miichthys miiuy were evaluated. One hundred and fifty Miichthys miiuy weighing approximately 200-260 g were divided into five groups and reared in 15 tanks with closed circuiting culture system. The animals were fed 5 diets： basal diet only （control） or supplemented of the basal diet with C. butyricum at doses of 10^3 （CB1）, 10^5 （CB2）, 10^7 （CB3） or 10^9 （CB4） CFU/g. Compared with the control, the serum phenoloxidase activity was significantly increased by the supplementation （P〈0.05）, acid phosphatases activity was increased significantly （P〈0.05） at the doses of 10^9 CFU/g. Serum lysozyme activity peaked at dose of 10^7 CFU/g and in the skin mucus at dose of 10^9 CFU/g. Immunoglobulin M level in the serum and skin mucus was increased except at dose of 10^3 CFU/g （P〈0.05）. The growth at the dose of 10^9 CFU/g was higher than that of the control （P〈0.05）. It is concluded that supplementation of C. butyricum can mediate the humoral immune responses and improve the growth performance in Miichthys miiuy.     

Ciona intestinalis as an emerging model organism： its regeneration under controlled conditions and methodology for egg dechorionation

The ascidian Ciona intestinalis is a model organism of developmental and evolutionary biology and may provide orucial clues concerning two fundamental matters, namely, how chordates originated from the putative deuterostome ancestor and how advanced chordates originated from the simplest chordates. In this paper, a whole-life-span culture of C. intestinalis was conducted. Fed with the diet combination of dry Spirulina, egg yolk, Dicrateria sp., edible yeast and weaning diet for shrimp, C. intestinalis grew up to average 59 mm and matured after 60 d cultivation. This culture process could be repeated using the artificially cultured mature ascidians as material. When the fertilized eggs were maintained under 10, 15, 20, 25 ℃, they hatched within 30 h, 22 h, 16 h and 12 h 50 min respectively experiencing cleavage, blastulation, gastrulation, neurulation, tailbud stage and tadpole stage, The tadpole larvae were characterized as typical but simplified chordates because of their dorsal nerve cord, notochord and primordial brain. After 8-24 h freely swimming, the tadpole larvae settled on the substrates and metamorphosized within 1-2 d into filter feeding sessile juvenile ascidians. In addition, unfertilized eggs were successfully dechorionated in filtered seawater containing 1% Tripsin, 0.25% EDTA at pH of 10.5 within 40 min. After fertilization, the dechorionated eggs developed well and hatched at normal hatching rate. In conclusion, this paper presented feasible methodology for rearing the tadpole larvae of C. intestinalis into sexual maturity under controlled conditions and detailed observations on the embryogenesis of the laboratory cultured ascidians, which will facilitate developmental and genetic research using this model system.     

图书销量的定量分析研究

一、影响图书销量的因素分析 1.策划编辑与作者水平因素 现代出版业中,图书销量在大程度上取决于图书所蕴涵的思想内容和文化积淀,而图书的思想内容和文化积淀又是由图书的选题策划编辑和作者水平的高低决定的.     

新华书店系统跨省连锁经营的品牌战略分析

渠道对于企业来说至关重要,谁掌握了渠道和资源,谁就占有了市场.未来几年是国内发行业从封闭到开放、从计划到市场、从粗放到集约、从被动到主动的关键转型期,我国图书发行业将完成新的市场格局、新的秩序和新的利益平衡的构建,这对出版物分销市场的投资者来说,无疑是一次巨大的商机.     

电视经济类专题韵故事化叙事及其动因分析——以央视财经频道《理财在线》栏目为例

本文对电视经济类专题节目故事化叙事的概念进行了界定,对其特征作了归结,并就电视经济类专题故事化叙事的动因最开分析,对这一现象的局限性给予了反思．