从Blog^α空间到QK（p,q）空间上的Volterra型复合算子

记D是复平面的开单位圆盘,H（D）表示D上的解析函数的全体,给出并证明了从Blog^α空间到QK（p,q）空间上的Volterra型复合算子有界性和紧性的充分必要条件．     

优化GM(1,1)模型在江西省GDP预测中的应用

本文详述了优化GM(1,1)模型,并以江西省GDP数据为实例,验证了优化GM(1,1)预测模型可用于经济指标GDP的预测:最后对模型进行了分析。     

种子区域生长法的改进算法及其在钉螺图像提取中的应用

种子区域生长法是图像分割中一种常用的方法,其性能在很大程度上取决于种子点的选取与生长规则.为了更有效地应用种子区域生长法从真实图片中提取钉螺图像,在分析种子区域生长法的基本思想后,提出了一种改进的种子区域生长算法并用于提取钉螺图像.改进种子区域生长法使用了新的区域生长相似性规则和区域生长停止的动态阈值方法,改进算法采用人工方式来选择区域生长的种子点.结果表明,改进的种子区域生长法在复杂背景图片中能获得更好的钉螺图像提取效果.     

六(-2-氧杂-3-氧代)丁基三聚氰胺的合成

合成了一种三聚氰胺衍生物六(-2-氧杂-3-氧代)丁基三聚氰胺,并对反应条件进行了优化,得到了合适的工艺条件:催化剂用量乙酸酐摩尔量的1.1倍,反应温度25℃,反应时间8 h,收率达到85%.     

基于数据挖掘关联规则Apriori改进算法的入侵检测系统的研究

在众多的关联规则挖掘算法中,Apriori算法是最为经典的一个,但Apriori算法有以下缺陷：需要扫描多次数据库、生成大量候选集以及迭代求解频繁项集。因而提出了一种新方法,使Apriori算法产生的候选项集再通过数据库查找是否为频繁项集,从而提高算法的效率。最后针对入侵检测系统形成关联规则。实验结果表明,改进后的算法...     

新词语中词语模模标研究

从2006-2008年的新词语中统计出具有模型化特征的词语365条,所用词语模84个,其模标由49个类词缀和35个标记语素(词)组成。对本源性模标的选择,常注重其文字的视知觉效果、修辞意义、经济性原则等;而他源性模标,有的是本土语言空缺的产物,有的是与本土元素完美结合的外来词语。     

江西兰科一新记录种—线柱兰

报道了产于南昌的兰科Orchidaceae线柱兰属Zeuxine线柱兰Z.strateumatica（L.）Schltr.,该种及其所在属均为江西首次发现。     

Characteristics of strontium isotopes and their implications in the Qixing Cave of Guizhou,China

The strontium isotopic compositions (87Sr/86Sr) of samples including soils, bedrock, soil waters, drip waters and their corresponding speleothems in the Qixing Cave (QXC), Guizhou Province, China, were systemically measured and analyzed. The results indicate that there are significant Sr isotopic differences among samples. The mean 87Sr/86Sr ratios in drip water for the samples 1#, 4# and 9# were 0.709568, 0.709139 and 0.708761, respectively, which possibly result from different flow paths, residence times, and other hydrogeological processes in the unsaturated zone overlying QXC. Meanwhile, levels of 40.8%, 57.6% and 72.4% of Sr in drip waters for 1#, 4# and 9#, respectively, were derived from bedrock dissolution, which was calculated by the mixture model of the two end-members (soil and bedrock). There is, however, no positive correlation between the relative proportion from bedrock dissolution (δ13C value is 1.8‰) and drip water δ13CDIC values. The mean drip water δ13CDIC value in 1# is the heaviest (–4.5‰) with the lowest contribution rate of bedrock dissolution, whereas the value in 9# is the lightest (–9.3‰) with the highest contribution rate of bedrock dissolution. The proportion from host rock dissolution in 4# is higher than that in 1# and lower than that in 9#, while its mean drip water δ13CDIC value (–8.6‰) is higher than that of 9# and lower than that for 1#. This suggests that the prior calcite precipitation (PCP) processes in the unsaturated zone overlying the cave are responsible for the δ13CDIC value differences between different drip waters, and not bedrock dissolution. Furthermore, this study also demonstrates that the 87Sr/86Sr ratios of speleothems in the 1# and 4# mainly reflect the variation in the relative proportions from the soil system (soil water) and bedrock dissolution overlying the cave. It is, therefore, feasible to use the strontium isotopic signals of speleothems as an indicator for soil chemical weathering intensity, and consequently as a monsoon proxy in the study area.     

基于DHP方法的锅炉燃烧系统优化控制研究

电厂锅炉燃烧过程是一个典型的强非线性、多输入、多输出、强耦合过程,以这一直接影响机组安全经济运行的复杂过程控制为研究对象,研究火电厂锅炉燃烧系统的优化控制.首先,采用径向基函数神经网络(radial basis function neural network,RBFNN)对电厂锅炉燃烧系统进行了建模和模型测试.然后,用...