Early Ad Hoc network commonly used planar structure which is characterized by simple structure, the equal status of each node, easy maintenance. But this structure limited the expansion of network. Hierarchical network management system provides an effective means to address these problems.So, at present, the development of Ad Hoc network towards hierarchical structure. The hierarchical structure can be extended flexible. And this structure is characterized by routing and control overhead and easy network management. But how to grade the network, which is looking for the superior performance of clustering algorithm, is one of the problems of hierarchical structure currently.This paper proposes a clustering algorithm of Ad-Hoc network based on honeycomb division to solve problems which is the classic clustering algorithm encountered.There are how to divide the scale of cluster,the buttleneck of cluster head and overlap of the member between clusters. And we proved that the method is effective and superiority by simulation tests.

In order to mine specified telecom customers with special behaviours from vast voice communication records of Telecom company, a novel Hybrid Data Mining method of Telecom Customers (HDMTC) with special behaviours is proposed in this paper, which integrates Kmeans and XGBoost into one framework. First, AHP model helped to model the features of customers with special behaviours. Then, Due to semi-supervised methodology, Kmeans approach was improved by small amounts of tagged initial cluster centroids and weighted Euclidean distance. Improved Kmeans was utilized to tag the decision attribute of data to construct training dataset. After that, XGBoost model was trained via the training dataset. Finally, the efficiency of HDMTC was validated via real records from telecom company.

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Phytosterols are bioactive components capable of reducing the level of cholesterol in serum. In this study, phytosterol acetic ester (PA), phytosterol oleate ester (PO) and phytosterol linoleic ester (PL) were synthesized from phytosterol (PS) and organic acid to improve the solubility of phytosterols in oil. The purities of PA, PO and PL were 98.4, 95.9 and 95.7%, respectively. Caco-2 cell monolayers and Wistar rats were used to research the bioavailability of synthesized esters (PE) in vitro and in vivo. Experiments using the Caco-2 cell monolayer model showed that the transport mechanism of phytosterol esters was passive transport. Experiments in vivo showed that the PS content in rat blood reached the highest level at 3 h, with a value of 21.82 μg/mL. PS content in the liver was the highest at 3 h, with a value of 43.65 μg/g. Bioavailability of PL is the highest, reaching a value as high as 19.57%. Acute study in the rats showed that the PS concentration in blood was at the safe level, and it had no side effects for health. In conclusion, the bioavailability of PL and PO is better than PS, PL and PO have more advantages in application.

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