共查询到20条相似文献，搜索用时 93 毫秒
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2012年7月21日,北京遭遇特大暴雨,截至22日2时,全市平均降雨164毫米。这是继1951年有气象观测记录以来观测到的最大值。而数据表明,同一时期城市汛期雨量增加了三成。到7月26日为止,北京在此次暴雨中的遇难人数已上升至77人。特大暴雨已致北京约160万人受灾,全市因灾造成的直接经济损失达116.4亿元。除北京外,西北地区也出现大量降雨。其中,甘肃中东部地区从20日以来相继普降暴雨或大暴雨,致 相似文献
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文忠宇 《楚雄师范学院学报》2003,18(3):91-93,100
本文用1961—2002年楚雄州10个站逐日雨量资料及历史天气图，统计分析了楚雄州暴雨的时空分布特征，得到的结果在暴雨预报及防灾减灾及气候区划方面有一定的参考价值。 相似文献
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张蓝蓝 《中山大学学报论丛》1993,(1)
普查1931～1990年4～5月逐日850hPa风场,发现马来半岛夏季风爆发的平均日期在5月20日前后,自它爆发后海南逐渐进入讯期首次高峰,文中重点对比了暴雨日异常少和多的1983年和1936年5月的月平均850hPa流场和逐日资料,结果表明,这两年夏季风爆发时间出现了异常,而且夏季风的强度、低纬环流、暴雨天气系统都有明显差异,受热带辐合带和热带气旋影响是夏季风爆发后海南岛5月暴雨偏多甚至异常多的主要原因。 相似文献
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受五号台风“海棠”影响，自7月21日至23日，郑州、荥阳、新密、登封等市普降大到暴雨。中牟境内也普降中到大雨，截至23日16时，郑州市平均降雨景达144mm，暴雨中心荣阳市平均降雨量达294mm，中牟县平均降雨量达98．7mm，最大降雨量达140mm。在强降雨的影响下，上游水库纷纷开闸泄洪，使郑州地区洪水下泄主要通道贾鲁河水位全线暴涨。7月23日上午8时许，贾鲁河中牟县城段水位达76．35m，出了现贾鲁河水倒灌县城滞洪区现象，对中牟县城造成了严重威胁。 相似文献
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《南阳师范学院学报》2016,(12):58-59
2016年6月5日晚南阳市出现了强降水、大风、强雷电、局地冰雹等强对流天气过程,最大风力12级,为多年来罕见.位于南阳城区的地磁仪器记录到了暴雨来临时剧烈的地磁变化,分析认为是由于暴雨而导致的地磁变化,为暴雨和地磁关系研究提供了新的例证. 相似文献
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《绵阳师范学院学报》2016,(8)
为了掌握川滇地区主汛期暴雨时空规律和发展趋势,本文以川滇地区70个气象站点的数据资料为基础,采用线性回归、反距离加权空间插值(IDW)等方法对近53a来川滇地区主汛期暴雨时空特征进行了研究.研究发现:川滇地区主汛期暴雨日、暴雨量、暴雨集中率、暴雨强度、暴雨贡献率在时间演变上均表现为增强趋势,增加倾向率分别为0.22 d/10a、0.98 mm/10a、0.04%/10a、0.29 mm/10a、0.43%/10a.主汛期暴雨日、暴雨量、暴雨强度、暴雨贡献率在空间分布上具有较强的空间一致性,主要集中在川东盆地,其次是云南大部分地区,川西高原地区最低;但暴雨集中率在川滇交界处的川西南地区、川东盆地南部地区和云南北部地区较高.近53a来川滇地区主汛期暴雨频率和强度分别增加了0.63%和1.60%,应采取相应措施预防暴雨可能造成的灾害损失. 相似文献
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螺旋度在突发性暴雨分析中应用 总被引：1，自引：0，他引：1
分析了陕西省20世纪80年代11次突发性暴雨过程的高低空螺旋度的配置，结果表明：高、低空螺旋度的高值中心及由高、低空高值轴所形成的围区都对暴雨落区有一定对应关系，对进一步研究暴雨的空间物理结构具有一定的现实意义。 相似文献
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《海外英语》2007,(5):10-11
Many college freshmen arrive woefully unprepared to do college work, and as disadvantaged populations continue to grow, the share of the American work force that has made it through college is expected to plummet. Many experts blame that educational failure not just on high schools but also on colleges. School & College, a special report by The Chronicle, looks at efforts to fix the system. What reforms would better prepare students for college? What should schools and colleges be doing differently? How should state and federal officials help? 相似文献
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罗艳萍 《读与写:教育教学刊》2008,5(6)
The communication of people partially is the communication of cultures. Culture has a direct effect on international commercial activities in all aspects. Different conceptions about time, space, equality, law and the like, lead people to deal with things in different ways. So to know cultures of the counterpart is to facil-itate our enterprises so as to have a smooth and successful communication in commercial activity. 相似文献
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《海外英语》2007,(4):36
There are numbers of crossroads on our long and unpredictable life journey where we totally have no idea about which direction to choose. No matter what our decision is, we should not turn back, but face the music and go ahead instead. I am this kind of girl who always does try without regretting, one example is how I dealt with my love. 相似文献
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Migration occurs behind a variety of reasons and has a great effect on the whole world. People may migrate in order to improve their economic situation, or in order to escape civil strife, persecution, and environmental disasters. The impact of migration is complex, bringing both benefits anddisadvantages. This paper briefly talks about the causes of migration, the allocation of benefits, and the ways in which individual countries and the international community deal with this important subject. 相似文献
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Richard Denner 《海外英语》2007,(4):14-15
Rosco and I wait for the fishermen to return.I sit at a wooden bench near the store at Mt.Baker Resort and watch the clouds change shape. Rosco has my belt around his neck and an eight foot tow chain hooked to a tree. Dogs must be on a leash. Ducks and rabbits are loose. 相似文献
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Given a graph G,a subgraph C is called a clique of G if C is a complete subgraph of G maximal under inclusion and |C|≥2. A clique-transversal set S of G is a set of vertices of G such that S meets all cliques of G. The clique-transversal number, denoted as TC (G), is the minimum cardinality of a clique-transversal set in G. The clique-graph of G, denoted as K (G), is the graph obtained by taking the cliques of G as vertices, and two vertices are adjacent if and only if the corresponding cliques in G have nonempty intersection. Let F be a class of graphs G such that F={G|K(G) is a tree}. In this paper the graphs in F having independent clique-transversal sets are shown and thus TC (G)/|G|≤1/2 for all G ∈ F. 相似文献
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Sister Carrie is one of the most controversial characters in American literature.Thought as a "fallen woman" firstly,she was defined as a "new woman" by some critics later. However, by digging into the motivaton behind the whole process of Carrie's "success", the relationship between Carrie and her creator (the author), the social conditions of then American, it can be found that Carrie has never been free-standing on her thought and she has never found her real-sdf even after becoming a famous actress. In a society dominated by mass consumerism Carrie is only an adherent of her own desires. She also is a representative of all those country girls flooded into cities, a symbol and a sacrifice of the urbanization of America in a time countryside was overcome by cities. 相似文献