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在企业环境中,管理数据流或者实时数据更新是任何数据挖掘操作的一个主要挑战.无论是数据还是元数据,都要确保数据流的稳定、正确、可验.在这种环境下,实时数据更新很复杂,且数据量大而难懂.管理频繁变化的数据和元数据对企业是巨大的挑战.本文阐述了在管理企业数据的任务中的技术问题,并提出了一种解决方法.这种解决方法可以结合多个领域里的知识,如工程技术和统计学,来理解和标准化企业挖掘的准备工作,以使信息采集和质量管理自动化. 相似文献
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Sowjanya Bachali K. Dasu K. Ramalingam J. N. Naidu 《Indian journal of clinical biochemistry : IJCB》2013,28(1):74-78
Vitamin D is recognized to serve a wide range of biological functions. The presence of vitamin D receptors on different tissues explains it’s diversity of actions. Reduced levels of vitamin D is associated with insulin resistance and increased diabetes risk. The study included 50 normal healthy individuals and 49 type 2 diabetes subjects. Fasting blood glucose, total cholesterol, triglycerides, HDLc, fasting insulin, parathyroid hormone, calcium, albumin and Homeostasis model for assessment of insulin resistance (HOMAIR) were measured in all the study participants. Type 2 diabetes subjects were divided into group 1 with 25 hydroxy vitamin D (25(OH)D) ≤20 ng/ml and group 2 with 25(OH)D >20 ng/ml. By the results of this study, the mean 25(OH)D level was low (20.09 ng/ml) in type 2 diabetes compared to controls (23.89 ng/ml) and the p value was 0.02. The estimated insulin resistance by HOMAIR was more in group 1 than in group 2 of diabetes with p value of 0.037. The Pearson’s correlation-coefficient was negative for 25(OH)D and insulin in type 2 diabetes (r = ?0.294), 25(OH)D was negatively correlated with HOMAIR in total subjects. Type 2 diabetes subjects had reduced levels of vitamin D than normal individuals. The insulin resistance was more in vitamin D deficiency state. Hence vitamin D has a role in glucose metabolism, deficiency can result in insulin resistance and diabetes. 相似文献
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