《语法的效率与复杂性》述评

霍金斯的<语法的效率与复杂性>是一部里程碑似的著作,论述了语言运用对语法的结构特点具有重大影响,对研究语言能力与语言运用的关系建立了新的标准,为形式与功能两种研究传统架起了一座桥梁.     

Application of system dynamics for assessment of sustainable performance of construction projects

INTRODUCTION Sustainable development is commonly definedas meeting the needs of the present without compro-mising the ability of future generations to meet theirown needs (WCED, 1987). All industries, includingthe construction industry should contribute to themission. Compared to other industries, constructionactivities are generally considered to have more im-pact on the environment, which provides the basicconditions for the sustainability and development oflife on the Earth. The…     

潮州筝乐及演奏技法特点浅析

潮州筝乐,高雅古朴,优美缠绵,历来被视为我国南派筝的代表。潮州筝发源于秦晋,成形于隋唐,在明清时期达到鼎盛,它深植于潮州音乐的丰沃土壤,与传统音乐保持着深厚渊源。潮州筝乐其独特的二四谱、按弦转调以及特有的演奏技法,都自成一格,堪称绝技。     

渗铝包子桶组织结构和性能研究

研究了渗铝包子桶的组织结构及其性能。热浸渗铝分为两层镀铝层和渗铝层，对其性能超决定性作用的是渗铝层。同未渗铝的其它钢种相比，具有优良的耐腐蚀抗高温氧化、抗硫蚀等性能。     

学习主体性对学习成绩影响的心理机制分析

促进学习主体性相关心理品质的培养,是当前的基础教育改革所面临的重要问题。本文从学习主体性等相关心理品质方面进行了深入分析和系统研究,以了解学生学习主体性水平的发展特征及影响因素,指出了如何充分调动学生的学习积极性、主动性和创造性的方法,从而促进学生更好地学习和发展。     

医学生的个性特征对学习成绩的影响

该研究的目的在于研究与其他专业的学生相比，医学生的个性特征中哪种更典型，更能影响医学生的临床前期课程学习。1997年，有785名学生进入了弗兰米西地区的大学学习医学，其中631名学生(占80．4％)进行了个性五因素的测定量表(NEO-PI-R表)测量，914名捷特大学其它7个专业的一年级学生也做了同样的测量。该研究还调查了这些医学生的期末成绩，第一学年有607名，第二学年413名，第三学年341名。结果表明，医学生的“外倾性”和“随和性”因素分值最高，“责任心”因素对临床前期的学习成绩的预测作用很大，“责任心”因素分值低而具有“社交”、“冒险”个性特征的学生更有可能无法通过考试。     

防裂高效减水剂在水泥混凝土路面中的试验研究

通过研究在水泥混凝土中加入由膨胀组份EVA粉厦减水组份自行配制而成的防裂型高效减水剂。改善了水泥混凝土的力学性能、细观结构以及收缩性能。为特殊路段使用水泥混凝土路面提供了广阔的应用前景。     

戈夫曼的拟剧理论与行为分析

本借戈夫曼拟剧理论中的舞台表演规则来探讨人与人之间相互行为中的一些基本过程和原理。     

A Web-Based Virtual Microscopy Platform for Improving Academic Performance in Histology and Pathology Laboratory Courses: A Pilot Study

Virtual microscopy (VM) has been utilized to improve students' learning experience in microscope laboratory sessions, but minimal attention has been given to determining how to use VM more effectively. The study examined the influence of VM on academic performance and teacher and student perceptions and compared laboratory test scores before and after VM incorporation. A total of 662 third-year students studying histology and 651 fourth-year students studying pathology were divided into two groups. The light microscopy (LM) group used a light microscope in 2014 and 2015, while the LM + VM group used the VM platform and a light microscope in 2016 and 2017. Four factors positively predict laboratory scores (R square, 0.323; P < 0.001): (i) the pathology course and test-enhanced learning, (ii) the VM platform and experience, (iii) medical students and lecture scores, and (iv) female students. The LM + VM group exhibited less score variability on laboratory examinations relative to their mean than the LM group. The LM + VM group was also associated with fewer failing grades (F grade; odds ratio, 0.336; P < 0.001) and higher scores (A grade; odds ratio, 2.084; P < 0.001) after controlling for sex, school, course, and lecture grades. The positive effect of the VM platform on laboratory test grades was associated with prior experience using the VM platform and was synergistic with more interim tests. Both teachers and students agreed that the VM platform enhanced laboratory learning. The incorporation of the VM platform in the context of test-enhanced learning may help more students to master microscopic laboratory content.     

高效液相色谱法测定尼群地平

采用高效液相色谱法 ,以HypersilC1 8( 4 .6mmi.d .× 2 5 0mm ;5 μm)为色谱柱 ,甲醇 水 (体积比为 70 :30 )为流动相 ,检测波长炒 2 37nm ,研究尼群地平性质。在质量浓度 1 2mg/L～ 1 2 0mg/L时质量浓度与峰面积线性良好 (r =0 .9996 ) ,日内差、日间差RSD为 0 8%和 1 2 % (n=5 )。方法简便、准确。