光电露点仪湿度测量的误差分析

指出用光电露点仪进行湿度测量时引入误差的各种因素,提出相应的解决方法。     

The α-limit sets of a unimodal map without homtervals

Let f:I→I be a unimodal map on I without homtervals. We characterize the α-limit set of each point in I by considering the consecutive renormalization process of f.     

地方新建本科院校的当下使命及其实现策略

经济发展方式的转变和社会发展的深刻变革,要求新建本科院校重新理解和阐释自身的使命,深入推进教育教学改革.要以更新观念为先导,以学科建设为龙头;崇尚实用,面向大众,服务地方,突出特色,创造性地培养高素质应用型人才,努力把学校建成学生永远的精神家园和美好的心灵故乡.     

茶树早期光诱导蛋白1基因的克隆和表达分析

报道了茶树早期光诱导蛋白1基因(CsELIP1)的cDNA和DNA序列的克隆.该基因编码蛋白含190个氨基酸残基,其基因组序列含有两个内含子(长度分别为129和855 bp).表达分析显示,CsELIP1的mR-NA水平在常温加较强光照(200μmol.m-2.s-1)和低温(5℃)弱光时上调都较少,但在5℃加200μmol.m-2.s-1时被强烈上调,表明CsELIP1的表达可能有一种在其他植物ELIP基因表达中存在的PSⅡ光合效率介导的调节方式.也暗示CsELIP1基因的生理作用可能涉及到茶叶细胞的光保护作用.     

脆弱模型中可靠性函数的界

在对总体的生存分析中,样本个体异质性的引入便于解释随机影响,本文主要探讨了脆弱变量V的概率密度函数为一元函数时各密度函数的形式以及可靠性函数的界.     

Oxidation effect on double H-bonded imidazole–adenine–imidazole trimer

The geometry, the IR spectra, the molecular orbital, and the related energy of the planar double hydrogen-bonded imidazole–adenine–imidazole trimer are investigated employing the reliable B3LYP/6-311+G* method. The H bonds generated by NH group of adenine reduce significantly upon oxidation and the H atoms transfer in different degree for three isomers. Significant IR spectra red-shift occurs upon oxidation for all N–H···N H bonds. The HOMO orbital is employed to explain the variation of H-bond alkalescence, as is effective to reveal the geometry variations and the IR spectra shifts. The adiabatic ionization potential obtained in experiment should be lower than our reported value for the possible higher degree of polymerization.     

Environmental flow requirements for integrated water resources allocation in the Yellow River Basin,China

Based on the classification and regionalization of the ecosystem, multiple ecological management objectives and the spatial variability of the environmental flow requirements of the Yellow River Basin were analyzed in this study. The summation rule was used to calculate water consumption requirements and the compatibility rule, i.e., “maximum” principle, was also adopted to estimate the non-consumptive use of water in the river basin. The environmental flow requirements for integrated water resources allocation were determined by identifying the natural and artificial water consumption in the Yellow River Basin. The results indicated that the annual minimum environmental flow requirements amounted to 317.62 × 10⁸ m³, which represented 54.76% of the natural river flows, while for the environmental flow requirements for the integrated water resources allocation were 262.47 × 10⁸ m³, which represented 45.25% of the natural river flows. The highest percentage of environmental flow requirements was 93.64% for the river ecosystem. It can be concluded that the primary concerns should be put on the downstream river water requirements to determine the environmental flows for integrated water resources allocation in a river basin.     

云南省森林资源发展趋势的LM—BP预测

云南省位于长江、珠江两大国内河流和萨尔温江、湄公河、红河三大国际河流的上游和发源地,山地多坝区少,陡坡开荒成为扩大种植面积和提高粮食产量的一种方式,加上对森林的乱砍滥伐,水土流失极为严重.森林资源通过地表防护,能有效保持水土.文章应用神经网络预测模型对云南省森林有林地面积、活立木蓄积、森林覆盖率进行预测分析,对云南省更加有效地保护森林资源,改善生态环境有一定的现实意义及参考价值.     

大鼠Harderian腺中卟啉的释放机理

大鼠Ｈａｒｄｅｒｉａｎ腺存在大量卟啉洒物质。分离细胞抽提物的荧光激发、发射光谱与标准原卟啉Ⅳ几乎完全重叠，说明大部分卟啉是原卟啉Ⅳ。荧光显微镜下分离的细胞发出很强的红色荧光，在分泌颗粒间隙荧光较分泌颗粒处更强，胆囊收缩素８肽（ＣＣＫ－８）、乌拉胆碱（Ｂｅｔｈ）皆不以刺激卟啉向胞外的释放。这些结果说明，Ｈａｒｄｅｒｉａｎ腺细胞向胞外释放卟啉不是通过胞吐进行的。     

语调、语气在演绎歌曲《松花江上》中的重要作用

汉语是声调语言,其语调、语气对歌唱的行腔和润色具有重要作用,通过对语调、语气与旋律、节拍、节奏、旋法特征结合的分析,试图找出在演唱过程中运用怎样的语调和语气才能恰如其分地表达出作曲家的创作意图,才能达到完美的二度创作、三度创作的效果。