让孩子们每天都期待着来到教室

"让每个孩子每天都期待着来到教室"是江苏省海门市德胜小学这所百年老校在缔造完美教室方面孜孜不倦的追求。近年来,学校满怀热情,努力用自己的行动让每一间教室都彰显出特色。     

高中物理传送带问题的分析与讨论

传送带问题是与生活实际联系紧密的问题,涉及运动学和动力学问题,也是高考的重点和难点,2012年安徽省高考理综试卷第24题就是一个涉及传送带的综合性较强的力学题目。本文以该题为例,在高考试卷命题组给出的标准答案的基础上,针对物块B从曲面上滑下来能否运动到传送带左端以及A、B第一次碰后B能否运动到右边的曲面上这两个问题的判断作出讨论,给出了多种分析判断方法,从而得出处理传送带的动力学这类问题的常规思路和一般方法。     

盘江人（52）

我们开辟《盘江人》这个栏目,陆续介绍在黔西南州这块沃土上辛勤耕耘、劳作的儿女。欢迎各界推荐。 邱靖 女,1978年10月生,贵州兴仁人,中共党员,2001年7月毕业于贵州师范大学政教系,同年分配到兴义民族师范学院工作至今,2011年获贵州大学法学硕士学位。现任兴义民族师范学院政治与历史系副主任、副教授。     

土壤湿度对中国西北地区夏季气候年际变率模拟效果的影响

利用耦合陆面过程模式CLM3的全球大气环流模式NCAR CAM3进行2组1979～2000年5～8月的集合试验,研究了表层土壤湿度对中国西北地区夏季气候年际变率模拟的影响。结果表明:在相同海温强迫条件下,采用年际变化的表层土壤湿度(ISSM)时,CAM3模式对于夏季西北地区气温和降水年际变率的模拟能力明显好于采用气候态的表层土壤湿度(CSSM)。计算表明,1979～2000年CSSM试验和ISSM试验模拟的西北地区夏季气温距平与ERA40资料的相关系数分别为0.60和0.65; CSSM试验模拟的西北地区夏季降水距平与CMAP资料的相关系数仅为0.29,而ISSM试验模拟结果与CMAP资料的相关系数为0.48。在相同海温强迫条件下,ISSM试验比CSSM试验能更好地模拟出中国西北地区夏季降水年际变率。     

冷眼东北亚 临津阁幽思

再访韩国,终于去了临津江上的临津阁。临津江发源于朝鲜境内,属于汉江的支流,向西南穿过朝韩军事分界线“三八线”流入韩国。令临津江声名大噪的,是朝鲜战争中的临津江一役。彭德怀指挥的这场战役,成为中国人民志愿军把战线从鸭绿江推进到“三八线”的关键之战。而近几年来,临津江泄洪问题曾一度成为朝韩关系的焦点。2009年9月,朝鲜在事先未通知的情况下将临津江上游的黄江水库开闸放水。导致韩国境内的临津江下游水位突然上涨,造成六名韩国人遇难。最近的一则新闻则是韩国军方9月中旬在朝韩接壤的临津江地区击毙了一名企图越境前往朝鲜的韩国男子。     

澳大利亚的政治“复仇”

澳大利亚政坛近期持续动荡,但在经历了一个躁动不安的不眠之夜之后,已逐渐恢复平静。6月26日晚,陆克文在在工党内部对决中战胜现任总理吉拉德,以57票对45票,重新夺得澳大利亚执政党党首地位。这一结果离2010年6月24日陆克文被他当时的副手吉拉德发动党内投票赶下台间隔3年零2天,     

Decadal variability of the IOD-ENSO relationship

Using three kinds of over 100-year sea surface temperature （SST） datasets as well as three-dimensional wind data from NCEP/NCAR, this paper documents the decadal variability of the Indian Ocean Dipole （IOD）-EI Nino/Southern Oscillation （ENSO） relationship. During 1948--1969, positive （negative） IOD and warm （cold） ENSO events were more independent of each other. But after 1970, they tended to occur in the same year. ENSO would influence the whole life span of IOD, and IOD also affects the developing phase of ENSO. Considering the climatological background SST, low-level winds and also equatorial vertical circulations, it is revealed that the decadal variability of the IOD-ENSO relationship may be caused by the enhanced Walker circulation with increased rising motion over the Maritime Continent after 1970. Warmer SST around the Maritime Continent gives rise to anomalous low-level convergence and intensified convection there, which apparently increases the SST linkage between the eastern Indian Ocean and the western Pacific and thereby the interaction between the IOD and ENSO event.     

Inter-hemispheric comparison of climate change in the last millennium based on the ECHO-G simulation

The commonality and difference in the variations of temperature and precipitation between the Northern Hemisphere （NH） and Southern Hemispheres （SH） in the last millennium are investigated by analysis of the millennium simulation with the ECHO-G coupled climate model. The NH mean temperature variations are generally consistent with those of the SH counterpart on the interannual, decadal and centennial time scales. But, the transition times between the medieval warm period （MWP）, the little ice age （LIA）, and the present-day warm period （PWP） in the NH leads that in the SH; and the anomaly amplitude in the NH is significantly larger than the SH counterpart. For the precipitation variations, the NH mean precipitation varies in-phase with the SH mean precipitation on decadal and centennial scales （mainly in the mid-high latitudes） but out-of-phase on the interannual scale （mainly in the low latitudes）. During the MWP the warming has comparable amplitude in the NH and SH; however, during the PWP the NH warming is considerably stronger than the SH warming. Further, the present-day temperature rises in the NH high latitudes but decreases in the SH high latitudes, which is very different from the warming pattern during the MWP. Since during the MWP the greenhouse gases （GHG） concentration stayed at a low level, we infer that the present-day opposite temperature tendency in the high latitudes between the two hemispheres may be related to the increase of the GHG concentration.     

经济增长的巨大环境代价

为办好2008年奥运会,北京花了大力气用于改善环境,奥运年的这个春天,感觉北京的环境有了明显改观。但不久前看到一则消息称,一些参加北京奥运会的外国选手因担心中国的食品安全而要自带食品;更有甚者,由于担心中国的环境污染,打算在奥运期间于韩国居住。凭直觉,这有很大的炒作成分,当然不排除有人顺手抹黑中国一把,那是习惯成自然了。     

Windows2003易忽视的安全设置

本文对Windows Server2003操作系统默认设置下,存在的安全隐患,进行了浅析。