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Ning Zuozhou Zhang Zhicheng Yan Qingsong Zhou Naifu Wen Linzi Peng Xichao Tang Yu Feng Pengju 《中国科学:化学(英文版)》2022,65(10):1962-1967
Science China Chemistry - A mild and practical protocol for selectively time-dependent dehydrogenative C-C coupling, as well as tandem coupling-cyclization reaction between indoles or/and other... 相似文献
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范德瓦尔斯分子p—C6H4FCH3...Ar外部振动的共振双光子电离光谱 总被引:1,自引:0,他引:1
利用单色共振双光子电离光谱技术研究了p-C6H4FCH3与Ar形成的范德瓦尔斯分子p-C6H4FCh3...Ar电子太跃迁O带附近的光谱,观察到了许多谱带。分析表明,这些谱带,除来自于甲基CH3内转动跃迁外,都可以归属为Ar相对于p-C6H4FCH3的振动跃迁。在用三维谐湃郛波函数一组合作为基和内德-琼斯作用的基础上,借助量子力学方法计算了p-C6H4FCH3...Ar分子中范德瓦斯振动的能级,计 相似文献
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A Bayesian network (BN) is a knowledge representation formalism that has proven to be a promising tool for analyzing gene expression data. Several problems still restrict its successful applications. Typical gene expression databases contain measurements for thousands of genes and no more than several hundred samples, but most existing BNs learning algorithms do not scale more than a few hundred variables. Current methods result in poor quality BNs when applied in such high-dimensional datasets. We propose a hybrid constraint-based scored-searching method that is effective for learning gene networks from DNA microarray data. In the first phase of this method, a novel algorithm is used to generate a skeleton BN based on dependency analysis. Then the resulting BN structure is searched by a scoring metric combined with the knowledge learned from the first phase. Computational tests have shown that the proposed method achieves more accurate results than state-of-the-art methods. This method can also be scaled beyond datasets with several hundreds of variables. 相似文献
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