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Keywords: Collaborative filtering User similarity Recommended precision Cold user Recommender systems a b s t r a c t Collaborative filtering has become one of the most used approaches to provide personalized services for users. The key of this approach is to find similar users or items using user-item rating matrix so that the system can show(More)
Topology is important for any type of networks because it has great impact on the performance of the network. For wireless sensor networks (WSN), regular topologies, which can help to efficiently save energy and achieve long networking lifetime, have been well studied in [1, 4, 5, 7, 9]. However, little work is focused on routing in patterned WSNs except(More)
In this paper, an efficient resource management scheme applied to heterogeneous services scenario in multiple- input and multiple-output/orthogonal frequency division multiplexing (MIMO/OFDM) system is proposed. The design of the scheme is to maximize the system throughput while guaranteeing QoS requirements for users. At medium access control (MAC) layer,(More)
—Considering the new feature after introducing the Relay Nodes (RNs) into the conventional cellular networks and the existing interference coordination techniques, a novel method of interference coordination for cell-edge users in Relay Enhanced Cells (RECs) is proposed in this paper. Firstly, all available frequency resource in each cell is divided into(More)
BACKGROUND MicroRNAs (miRNAs), a class of small non-coding RNA molecules, are indicated to play essential roles in spermatogenesis. However, little is known about the expression patterns or function of miRNAs in human testes involved in infertility. METHODS In this study, the miRNA expression profiles of testes of patients with non-obstructive azoospermia(More)
MicroRNAs (miRNAs) have been indicated to play key roles in ovarian follicular development. However, little is known about how the miRNA gene expression itself is regulated in the mammalian ovary. We previously reported that miR-224 is involved in TGF-β1-mediated follicular granulosa cell (GC) growth and estradiol (E2) production by targeting Smad4. Here,(More)