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Hunan, China

Zhu Q.,Hunan UniversityHunan | Miao L.,Hunan UniversityHunan
Energy Science and Applied Technology - Proceedings of the 2nd International Conference on Energy Science and Applied Technology, ESAT 2015 | Year: 2015

Currently, Hadoop is widely used in a growing number of network applications. Based on the advantages of its open source framework for distributed systems, it implements Hadoop distributed file system and Map Re-duce distributed computing framework. Therefore, how to conduct performance monitoring nodes in the cluster to ensure the normal and efficient operation of the whole cluster is one of the key studies on Hadoop. Although there are a large number of third-party monitoring tools to achieve monitoring for Hadoop cluster, limitations of monitoring indicators lead to inadequate monitoring granularity. This article is a supplement of Ganglia, which is a real-time monitoring system. Using JMX interface which Hadoop supports to get more monitoring indicators, we can achieve full performance monitoring of Hadoop cluster when running tasks. Meanwhile, it makes use of the advantages of Nagios and MongoDB, and resolves the problem that Ganglia cannot store data permanently. © 2016 Taylor & Francis Group, London. Source


Fang Y.,Hunan UniversityHunan | Yi X.,Guilin Normal CollegeGuangxi | Qin W.,Guilin Normal CollegeGuangxi | Zhang Y.,Guilin Normal CollegeGuangxi | Liao Y.,Guangxi Academy of Fishery science
Asian Journal of Chemistry | Year: 2014

A series of 2-oxo-quinoline-3-Schiff-base derivatives (4a1-4n2) have been designed and synthesized as new antitumor agents. in vitro Antitumor activities were evaluated against four cancer cell lines including MGC80-3, BEL-7404, A549 and NCI-H460. Compounds 4a1, 4a2, 4c2, 4d1, 4d2 and 4l2 exhibited better inhibition activities than commercial antitumor drug 5-fluorouracil (5-fluorouracil, IC50 = 44 ±0.54 μM) on NCI-H460, with IC50 of 35.52 ± 0.86, 16.22 ± 0.71, 11.62 ± 0.52, 5.16 ± 0.37, 7.62 ± 0.46 and 7.66 ± 0.65 μM, respectively. © 2014, Chemical Publishing Co. All rights reserved. Source


Pan L.,Hunan International Economics University | Wang H.,Hunan UniversityHunan | Li R.,Hunan UniversityHunan | Cao Y.,Hunan UniversityHunan
Industrial Engineering and Manufacturing Technology - Proceedings of the 2014 International Conference on Industrial Engineering and Manufacturing Technology, ICIEMT 2014 | Year: 2015

The multi-dimensional trend of the grid resource service has made its trust assessment complex. State of the art works hold the limitations in that they use simple or subjective methods to evaluate the trustworthiness of the service, which leads to misinformation or inaccurate assessments. In this regard, this paper proposes schemes to specify the trustworthiness of each service type, based on the multi-dimensional attributes of the service; in particular, we construct models to derive the desired trust value of the provided services with respect to both the user and recommender transaction records. Such mechanisms can better reflect the user’s actual demand whilst also achieving satisfactory performance in grid resource transactions. © 2015 Taylor & Francis Group, London. Source


Pan L.,Hunan International Economics University | Wang H.,Hunan UniversityHunan | Li R.,Hunan UniversityHunan | Cao Y.,Hunan UniversityHunan
Industrial Engineering and Manufacturing Technology - Proceedings of the 2014 International Conference on Industrial Engineering and Manufacturing Technology, ICIEMT 2014 | Year: 2015

The IEEE 802.16j based Broadband Wireless Access(BWA) is a brand-new technology to support high speed and wide coverage communications. However, the application of such communication networks faces significant challenges due to the time-varying character of the communication channels. In this regard, we first propose a novel scheme to exploit the optimal channel transmission capacity based on the state of each communication channel. Then we design an effective channel usage scheme to fully utilize the channel transmission bandwidth with respect to users’ requirements. Moreover we also make the performance analysis on the proposed schemes with respect to various metrics. Experiment results validate the efficiency and efficacy of the proposed schemes. © 2015 Taylor & Francis Group, London. Source


Yan L.,Hunan UniversityHunan | He J.,Hunan UniversityHunan | Chen M.,Hunan UniversityHunan | Tang J.,Hunan UniversityHunan | Chen L.,Hunan UniversityHunan
Energy Science and Applied Technology - Proceedings of the 2nd International Conference on Energy Science and Applied Technology, ESAT 2015 | Year: 2015

The performance of blind equalization and frequency offset estimation scheme in coherent optical Minimum-Shift Keying (MSK) communication is investigated. At the receiver, blind equalization scheme is used to compensate fiber dispersion and nonlinearity in the electrical field. Meanwhile, a frequency offset scheme based on Fast Fourier Transform (FFT) and Chirp Z-Transform (CZT) can be used to frequency offset estimation and recovery. The simulation results show that the 10-Gb/s MSK signals can be recovered successfully using the blind equalization and frequency offset estimation scheme. © 2016 Taylor & Francis Group, London. Source

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