Some evidence of drying trend over northern China from 1951 to 2004

The surface wetness index, Palmer drought sererity index and the retrieval of soil moisture over China were calculated using monthly precipitation and monthly mean surface air temperature. Based on the contrast analysis of the variation of the above three indices and precipitation, the dry/wet spatio-temporal pattern of northern China in the last 54 years was revealed, and the evidence of drying trend over northern China was analyzed, especially. The results show the following four facts: (1) The drying trend is the main characteristic of the eastern part of Northwest China and the central part of North China since the 1980s and it was enhanced in the last 15 years mainly due to the precipitation decrease and the temperature increase; (2) During the last 54 years, there was only one dry/wet shift at the interdecadal scale occurring in the eastern part of Northwest China and the central part of North China in the late 1970s, which was related to 1977/1978 global abrupt change, whereas there were three shifts in Northeast China, one was in the mid 1990s and the other two were in 1965 and 1983, respectively; (3) Unlike the variation trend of other subregions of northern China, the western part of Northwest China is currently located in a relatively wetting period, which is weak-ened due to the temperature increase; (4) The extreme drought frequency is obviously increasing in the eastern part of Northwest China, the central part of North China and Northeast China since the 1980s, which is closely related to the precipitation decrease and temperature increase in these subregions.     

小学数学教学方法改革的宏观走向

随着我国教育改革发展的不断深化,教学方法的改革越来越引起广大教师的重视.在继承传统教学方法的基础上,教学方法的改革应坚持什么样的指导思想,教学方法改革的趋向都有哪些,这些都是小学数学教学方法的改革应该关注的问题.     

林语堂笔下的庄子形象简

林语堂深受道家学说影响，其多种著述都对庄子形象有过塑造和阐释。通过探究林语堂作品中有关庄子的论述，可以分析其笔下庄子形象的传统性和现代性特征，进而把握其建构庄子形象的审美趋向及存在的局限。     

汉字改革趋向新探(之二)

<正> 二形声化的改革趋向汉字发展应分为三个阶段:象形、指事和会意为初级阶段;假借为中级阶段;形声、转注为高级阶段。象形、指事和会意是初级阶段;它通过"依类象形"的原则创造了象形文字,即"字形表义"字。假借为中级阶段;它是从象形、指事和会意的初级阶段的基础上发展起来的.即通过"同意代替"的原则使"字形表义"字变成了"字音表义"字。黄侃《论学杂著》:"文字根于语言,语言发乎声音。"这种借音表义实即语源义,其它语族的拼音文字正是从这借音表义的直音化的假借阶段走上拼音文字路线的;汉字却没有这样,它通过形声和转注开始向"字形表义"回归。形声、转注为高级阶段;它是从假借的中级阶段的基础上发展起来的,即通过"形声相益"的原则使"字音表义"字变成了"标音衍形"字。其中,转注是给"转声托事"的假借字     

近25年高等教育“小语教”教材研究

将我国高教近25年来35种《小语教》教材分期、分类,并对代表性教材进行重点评价,勾勒高教《小语教》教材建设的概貌,描述高教《小语教》教材的发展特点与演进趋向.     

管理·企业管理趋向·企业管理文化内涵

论述了管理作为一种社会活动的全过程的含义、内容、方式和作用，探讨了现代企业管理主要趋向，并结合中国企业管理的特点透视了其文化内涵。     

对重要极限的继续认识

该文通过对重要极限中的函数、自变量的分析,分解、变化函数或自变量,阐述极限概念、定理、性质的内涵。     

新媒体的传播学属性分析

新媒体正生机勃勃日趋成熟.2008年的西藏事件与汶川大地震见证了新媒体的主流媒体力量正得到社会各界认同,由国务院四大相关部委牵头召开的"新媒体高峰论坛"显示出高层对新媒体的关注.本文从整体互动社会系统传播模式的四大圈层人手,对新媒体的传播学属性与发展趋向进行了分析与探究.     

秩序中的"他者"——浅谈20世纪后半期西方文论趋向

按照黑格尔和萨特的定义:"他者"是指:"主导型主体之外的一个不熟悉的对立面或者否定因素,因为它的存在,主体性的边界才得以界定,权威才得以建立."<'[1]>据此定义来审视20世纪后半期西方文论,可以发现这样一个趋势:"20世纪的西方文论史,是一部"他者"对主流话语权的争夺史.本文以流行于20世纪后半期的生态主义、后殖民主义、女性主义、新历史主义为例做简要的描述.