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In the present study, we investigated the roles and molecular mechanisms of miR-320a in human nasopharyngeal carcinoma (NPC). miR-320a expression was strongly reduced in NPC tissues and cell lines. Overexpression of miR-320a significantly suppressed NPC cell growth, migration, invasion and tumor growth in a xenograft mouse model. A luciferase reporter assay revealed that miR-320a could directly bind...
The C282Y and H63D polymorphisms in the HFE gene have been implicated in susceptibility of breast cancer, but a number of studies have reported inconclusive results. The aim of this study is to investigate the association between the C282Y and H63D polymorphisms in the HFE gene and breast cancer risk by meta-analysis. We searched PubMed and Embase databases, covering all related studies until March...
A dual-detector and dual-axis compound-axis acquisition, pointing and tracking (APT) scheme of airborne laser communication is proposed, according to the environment and distance of communication link. And a detailed analysis and optimization design of whole optical path structure is carried out. The compound axis consists of Coarse Tracking Assembly (CTA) and Fine Tracking Assembly (FTA). CTA performances...
An effective means for achieving high tracking accuracy is utilization of coarse and fine compound-axis structure in space laser communication. Firstly, this paper makes an optimization design of whole optical-path structure. Secondly, for enhancing energy density of beacon to make CCD work with high frame rate in the process of fine tracking, a technique is put forward, which uses a single beacon...
Dynamic and high tracking accuracy is the prerequisite of reliable space laser communication links and its effective means is using of coarse and fine compound-axis structure. This paper analyses these specific factors that effect the bandwidth and tracking accuracy of Fine Tracking Assembly (FTA), and puts forward corresponding methods with respect to optimization of techniques and selection of devices...
By combining the Data Envelopment Analysis method with the Malmquist productivity index, this paper carries out a dynamic evaluation of technology innovation efficiency of Henan's High-Tech industries from 2004 to 2008. The results show that technical innovation efficiency of these industries is not effective. The reasons are analyzed by inspecting technology efficiency change and technological change,...
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