魏晋南北朝博士职责、考选及其变异论略

魏晋南北朝时期,博士的选任方式、职责种类都发生了较大的变化。博士任选主要有两大特点:一是汉代形成的考选博士的制度被破坏,一再强调“高选”,而又缺乏具体的措施和标准,导致博士水平下降;二是博士类别增多,除太学博士外,又有国子博士、书学博士、律学博士、医学博士、四门博士、仙人博士等称谓。博士主要职责是兼国策顾问、礼仪顾问。由于社会动荡不安,朝廷更迭无常,官学时兴时废,作为学官的博士形同虚设,无所事事,失其职责。博士弟子更是无心向学,其直接后果是导致整个社会的学术水平下降。     

试析中国历史上教育家涌现的三个高峰期

中国历史上先后出现过无数教育家,其中春秋战国时期、两宋时期和近现代之际是教育家大批涌现的高峰期。这三个时期各有不同的时代特征,同时具有若干相同或相近的特点。研究这些特点,有助于探索教育家大批涌现的历史奥秘,为当代教育家成长提供有益借鉴。     

论衔接的艺术

对衔接手段的讨论常见于语篇分析和语用学的研究中。衔接在话语交际中的作用是不可忽视的,特别是在一些自然话语中人们依然可以有意识的使用衔接手段使话语的关联性发生微妙的变化,从而改变交际双方谈话的方向,乃至关系,主动的可以转为被动,被动的可以转为主动。了解衔接的重要作用可以提高人们的话语理解力和交际能力。     

教师评价内容体系之重建

针对当前教师评价理论与实践存在的问题,教师评价内容体系的重建是教师评价研究的一项重要任务。以教师基本素质、职责与表现为主要成分,整合教师胜任力评价、教师绩效评价和教师效能评价的契合之处,在理论上提出了教师评价内容体系的金字塔模型。金字塔模型主要有成分、维度与指标三级体系构成,它对量化教师绩效评价、促进教师专业发展、加强教师培训与提升教师整体素质都具有重要价值。     

新课程理念下高中数学有效教学模式初探

一、自主讨论式 自主讨论式是学生与学生之间或学生与老师之间的一种群体交往行为,针对要完成的教学目标,激励学生主动、大胆发表自己的意见与见解,从而达到教学目的.     

浅析多元智能课堂模式在中职体育教学中的应用

在现阶段的教学大变革环境下,多元智能化教学在当今的中职体育教学中已经有了一定程度的应用。随着社会经济的发展对教学质量的要求越来越高,多元智能化教学模式必然会成为当今大多数学校教学的发展趋势,多元智能化教学会随着学校教学的发展成为当今教学的主流方式,在教学过程中会占据非常大的比重,是新课堂中的另一种有效的教学方式。     

GLABROUS INFLORESCENCE STEMS regulates trichome branching by genetically interacting with SIM in Arabidopsis

Arabidopsis trichomes are large branched single cells that protrude from the epidermis. The first morphological indication of trichome development is an increase in nuclear content resulting from an initial cycle of endoreduplication. Our previous study has shown that the C2H2 zinc finger protein GLABROUS INFLORESCENCE STEMS (GIS) is required for trichome initiation in the inflorescence organ and for trichome branching in response to gibberellic acid signaling, although GIS gene does not play a direct role in regulating trichome cell division. Here, we describe a novel role of GIS, controlling trichome cell division indirectly by interacting genetically with a key endoreduplication regulator SIAMESE (SIM). Our molecular and genetic studies have shown that GIS might indireclty control cell division and trichome branching by acting downstream of SIM. A loss of function mutation of SIM signficantly reduced the expression of GIS. Futhermore, the overexpression of GIS rescued the trichome cluster cell phenotypes of sim mutant. The gain or loss of function of GIS had no significant effect on the expression of SIM. These results suggest that GIS may play an indirect role in regulating trichome cell division by genetically interacting with SIM.     

互动型《英语电影赏析》课堂的文化交流模式

本文以交互作用理论为依据,结合笔者教学实践,探讨《英语电影赏析》教学中师生互动的文化交流模式的设计与创建,通过课前准备、课堂互动、提问交流等环节培养学生的语言输出能力和文化素养,突出学生的自主性和合作性,强调教师的组织引导及有效监控。     

Vapor-liquid equilibrium simulation of binary and ternary mixtures of CH4, C2H4 and iso-C4H10

The vapor-liquid equilibrium（VLE） properties for the binary and ternary mixtures of CH4,C2H4 and isoC4H10 are of great importance in the recovery of ethylene from mixture containing CH4 and C2H4 with iso-C4H10 as solvent.Hence,Gibbs ensemble Monte Carlo（GEMC） simulations were used to estimate vapor-liquid equilibrium for the binary and ternary mixtures of CH4,C2H4 and iso-C4H10 with the united atom potential NERD model.The selected simulation conditions are based on the experiment in the literature.The results of this work were shown to be in satisfactory agreement with available experimental data and predictions of Peng-Robinson equation of state.The structure of simulated liquid phase is also characterized by radial distribution function（RDF）,which contributes to further understanding of the VLE curve of these systems.RDF is not sensitive to the pressure and temperature range.With the increase of pressure or the decrease of temperature,the molecules tend to gather together.