相关文献表明，发达经济体宏观波动非对称性的研究大都在经验上证实了宏观经济波动的非对称性，这些研究都是基于严格的计量检验和估计理论。
Unfortunately, from the scanty researches which focus on Chinese economic fluctuations, one can not find any test of whether fluctuations are asymmetric but only the estimation.
几个研究也表明：缺血客观的标记（如乳酸水平，异前列腺素浓度）和在其环境中的IMA水平有很好的相关性（文献10，19）。
Several studies have also shown a good correlation between objective markers of ischemia, such as lactate levels and isoprostane concentrations, and IMA levels in this setting.10
对现有文献的梳理表明，电子商务战略和电子商务经营模式之间，存在正相关关系的研究假设。
By combing the exiting literature, we find a research assumption that there is a positive correlation between electronic business strategy and business operation mode.
应用推荐