In recent years, realising a ＂clean- state＂ design for the future Internet has become an important research focus. An architecture com- bining an Information-Centric Network （ICN） and Sottware-Defmed Network （SDN...In recent years, realising a ＂clean- state＂ design for the future Internet has become an important research focus. An architecture com- bining an Information-Centric Network （ICN） and Sottware-Defmed Network （SDN） （IC-SDN） has gradually attracted more attention. How- ever, the existing studies regarding IC-SDN still lack support in terms of the ＂network status awareness＂ function, resulting in unreasonable resource allocation. In this paper, we propose a new status-aware resource adaptation sche- me, i.e. a status-aware module is embedded into basic elements （Forwarding Node （FN） and Resource adaption Manager （RM））. The FNs collect the network status dynamically for the controller to reallocate network resources accor- ding to the fluctuations in environmental con- ditions. Simulation results show that, compared with the existing IC-SDN mechanism, the pro- posed scheme reduced the link bandwidth var- iance by 56% and the content delivery latency by 40%. The proof-of-concept implementation demonstrates the feasibility of our proposed sc- heme for small-scale deployment.展开更多
Management in water resources development of Jinghe watershed of western t：ural China is examined with Participatory Rural Appraisal method -- a rare applied method in China and questionnaire survey of stakeholders C...Management in water resources development of Jinghe watershed of western t：ural China is examined with Participatory Rural Appraisal method -- a rare applied method in China and questionnaire survey of stakeholders Combination of these two survey methods derives good restlts as it coutd avoid personal bias in identifying and ranking the issues on a concrete bas＇is in following up households＇ survey. Statistic Package for Social Sciences gSPSS） was used for data analysis. Results indicate that since the early 1980s, issues of water scarcity, river pollution, soil erosion, insufficient participation of stakeholders in water resources use and management, as well as centralized water planning and management system have created difficulties for Sustainable development of the watershed. The stakeholders and local governments are fully aware of the challenges and are committed to achieving a solution through integrated water resource management （IWRD）. The concept anti the application of IWRD for rural China are reviewed and analyzed, and a fram cessful implementatio involvement and capacity building in water sector, which heed to fully, integrate various management functions within the watershed.展开更多
基金supported in part by the National Basic Research Program of China(973 Program)under Grant No.2013CB329100the National Natural Science Foundation of China under Grants No.61232017,No.61271200the Fundamental Research Funds for the Central Universities under Grant No.2013YJS007
文摘In recent years, realising a ＂clean- state＂ design for the future Internet has become an important research focus. An architecture com- bining an Information-Centric Network （ICN） and Sottware-Defmed Network （SDN） （IC-SDN） has gradually attracted more attention. How- ever, the existing studies regarding IC-SDN still lack support in terms of the ＂network status awareness＂ function, resulting in unreasonable resource allocation. In this paper, we propose a new status-aware resource adaptation sche- me, i.e. a status-aware module is embedded into basic elements （Forwarding Node （FN） and Resource adaption Manager （RM））. The FNs collect the network status dynamically for the controller to reallocate network resources accor- ding to the fluctuations in environmental con- ditions. Simulation results show that, compared with the existing IC-SDN mechanism, the pro- posed scheme reduced the link bandwidth var- iance by 56% and the content delivery latency by 40%. The proof-of-concept implementation demonstrates the feasibility of our proposed sc- heme for small-scale deployment.
基金supported by the National Natural Science Foundation of China (grant No.30670374)National Key Project for basic research in agricultural environment (grant No.2002CB111506)Knowledge Innovation Program of the Chinese Academy of Sciences (grantNo. 06W60000SZ, 066U0401SZ).
文摘Management in water resources development of Jinghe watershed of western t：ural China is examined with Participatory Rural Appraisal method -- a rare applied method in China and questionnaire survey of stakeholders Combination of these two survey methods derives good restlts as it coutd avoid personal bias in identifying and ranking the issues on a concrete bas＇is in following up households＇ survey. Statistic Package for Social Sciences gSPSS） was used for data analysis. Results indicate that since the early 1980s, issues of water scarcity, river pollution, soil erosion, insufficient participation of stakeholders in water resources use and management, as well as centralized water planning and management system have created difficulties for Sustainable development of the watershed. The stakeholders and local governments are fully aware of the challenges and are committed to achieving a solution through integrated water resource management （IWRD）. The concept anti the application of IWRD for rural China are reviewed and analyzed, and a fram cessful implementatio involvement and capacity building in water sector, which heed to fully, integrate various management functions within the watershed.
