共查询到20条相似文献，搜索用时 171 毫秒
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利用楚雄市气象站1987-2007年观测资料中的风向资料来统计代表冬季的1月和代表夏季的7月的风向频率,冬夏两季节的盛行风向风呈90度角.据此从季风角度结合楚雄市的居住区分布现状提出适宜楚雄市居住区和工业区布局的模式及总体布局.利用楚雄市2006年环境监测污染物二氧化硫、二氧化氮和可吸入颗粒物日浓度资料和同步风资料分别分析风向风速与二氧化硫、二氧化氮和可吸人颗粒物浓度的关系,它们的浓度随风速风向的变化而变化. 相似文献
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利用2014~2015年漳州市区蓝田、三中和九湖3个监测站大气污染物浓度资料,对近地面臭氧污染的变化特征和影响因素进行分析。漳州近地面臭氧浓度在夏季较低,而峰值主要出现在4月或10月。臭氧浓度与NO2浓度密切相关,在全年统计下呈正相关。当温度高于20°C,日照时数大于5h,风速小于2m/s时,漳州市区易形成臭氧污染天气。 相似文献
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研究目的:以空间相关系数、降雨量和降雨次数为指标,利用实测的气象数据,评估一个新的多站天气发生器GiST在中国东部钱塘江流域模拟降雨的性能。在此基础上,结合全球气候模式Hadgem2-ES,分析在浓度路径RCP 8.5下GiST模拟2071–2100年的降雨情况。创新要点:通过评估一个新的多站发生器在模拟降雨方面的性能,以此来提高未来气候情景预测的精度。研究方法:用多站天气发生器和变化因子方法,重点结合CMIP5中的Hadgem2-ES模型,模拟钱塘江流域七个站点的基准期以及未来预测期降雨量和空间相关性,并作出评估。重要结论:多站天气发生器GiST能很好地模拟钱塘江流域的降雨以及其空间相关性。该工具有潜力作为水资源管理,极端事件分析,政府决策、水文模型以及气候变化研究的工具。 相似文献
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漳州市蓝田工业开发区是经福建省人民政府批准的省级市属重点开发区。2000年经市政府批准设立漳州市高科技产业开发区、漳州市台商投资工业区。总体规划面积中长期为5平方公里,远期10平方公里。其性质为:轻型、低耗、轻污染的外向型工业区。 蓝田工业开发区以优越的地理位置、完善的基础设施和高品味的服务质量,赢得中外客商的青睐。截至2001年底,共引进内外资 相似文献
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为探索福州市周边乡村空气负离子浓度变化特征,以孔元村、井下村为研究对象,选择五一游客游览高峰期,收集并分析5种游憩地12个监测点的空气负离子浓度和气象因子等数据,研究乡村空气负离子浓度日变化规律及空气负离子浓度变化与气象因子、游客游览行为间的相关性.结果表明:①初夏孔元村、井下村空气负离子浓度均值为3 383.49个/m3,达到对人体影响的I级标准;②不同游憩地类型,空气负离子日均浓度变化不同;③5类游憩地空气负离子浓度从高到低依次为水畔游憩地游憩林地硬质铺装游憩地庙内田园游憩地;④海拔、温度、气压、湿度等气象因子对空气负离子浓度影响较大,其中主要影响因子为温度和湿度;⑤乡村游憩地空气负离子浓度与游客行为活动关系密切,客流量大的监测点空气负离子浓度较低. 相似文献
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何朗 《读与写:教育教学刊》2012,(4):244-245
本文根据2007-2011年南充市二氧化硫、二氧化氮、可吸入颗粒物浓度的监测数据,综合运用大气环境质量指数评价法对南充市的大气环境质量进行分析与评价,并运用Spearman秩相关系数预测其发展趋势。结果表明:南充市大气环境质量为轻度污染,主要大气污染物为可吸入颗粒物和二氧化硫。二氧化氮基本无污染,但有上升趋势。二氧化硫呈不显著下降趋势,可吸入颗粒物呈上升趋势。 相似文献
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以合肥市冬季典型重污染天气为对象,运用大数据和计算机模拟合肥市冬季典型重污染天气分布格局,同时使用景观指数移动窗口方法对测试数据进行综合分析.通过对该地区的年均与不同季节内的各气象因子在空间中的浓度分布状态的研究,结果显示:气象因子对合肥市冬季典型重污染天气污染物浓度的变化影响显著,具有季节效应.同时该研究结果能够有效反映气象因子与合肥市冬季典型重污染天气特征间的关系,对指导改善城市污染具有重要的价值. 相似文献
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为了实现微地形风场环境的精细化感知,保障高铁安全运行,开展了高铁沿线微地形风速修正研究。首先选取高铁目标站周边的气象参考站,从地统计学角度分析区域内阵风因子的分布特征及风速的变化特征;然后利用Copula函数对气压、气温、降水、相对湿度这4种气象要素与10 min平均风速进行相关性分析;最后提出了基于阵风因子和Copula函数协同多要素的湖泊环境微地形风速修正公式。结果表明：气温与风速呈正相关关系,相对湿度与风速呈负相关关系;所提风速修正方法对高铁沿线湖泊环境具有针对性,相较现有计算方法修正效果提升约20%。 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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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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《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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陈美曦 《山东教育学院学报》2008,23(2):103-107
Different nations have different social cultures, and the social culture of every nation is developing with the development of the nation, language is greatly influenced by social culture, which enables language to possess national and historical characteristics. Word is the smallest, independent, meaningful linguistic unit of language. It can well reflect the national and historical characteristics. From synchronic aspect, the social and cultural influence on word meaning is mainly embodied in conceptual and associative meanings of word. The incorrespondence of word meaning is a phenomenon that exists in both conceptual and associative meanings of word among different languages. From diachronic aspect, the development of social culture causes some changes of word meaning to some extent. Therefore, social culture plays a key role in vocabulary learning and mastery of a language. 相似文献
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邱崇丙 《唐山师范学院学报》2014,(1):21-23
汉字的六书,《说文》对“转注”一类,语焉不详。后世学者提及转注,也仅限于许慎所举出的例字。《汉字例说》一文,作者从转注的角度综合考虑,对部分现代常用字作了分析,跟传统的解释有所不同。希望能抛砖引玉,互相切磋,以推进学术研究。 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