As China＇ s sustainable economic development, transportation increasingly highlighted the importance of their role in the economic development. Highway as an important part, direct impact on a region or even a countr...As China＇ s sustainable economic development, transportation increasingly highlighted the importance of their role in the economic development. Highway as an important part, direct impact on a region or even a country＇ s economic development capacity. As an important national public infrastructure, highway construction requires a lot of capital investment as a support, but the highway has been a lack of funds is a major problem facing. Based on the domestic and international comparative analysis of highway financing mode, from both theoretical and practical aspects of the analysis of highway financing issues were discussed, and combine with the characteristics of highway financing system, propose suitable means of financing the construction of highway.展开更多
In order to improve the concurrent access performance of the web-based spatial computing system in cluster,a parallel scheduling strategy based on the multi-core environment is proposed,which includes two levels of pa...In order to improve the concurrent access performance of the web-based spatial computing system in cluster,a parallel scheduling strategy based on the multi-core environment is proposed,which includes two levels of parallel processing mechanisms.One is that it can evenly allocate tasks to each server node in the cluster and the other is that it can implement the load balancing inside a server node.Based on the strategy,a new web-based spatial computing model is designed in this paper,in which,a task response ratio calculation method,a request queue buffer mechanism and a thread scheduling strategy are focused on.Experimental results show that the new model can fully use the multi-core computing advantage of each server node in the concurrent access environment and improve the average hits per second,average I/O Hits,CPU utilization and throughput.Using speed-up ratio to analyze the traditional model and the new one,the result shows that the new model has the best performance.The performance of the multi-core server nodes in the cluster is optimized;the resource utilization and the parallel processing capabilities are enhanced.The more CPU cores you have,the higher parallel processing capabilities will be obtained.展开更多
文摘As China＇ s sustainable economic development, transportation increasingly highlighted the importance of their role in the economic development. Highway as an important part, direct impact on a region or even a country＇ s economic development capacity. As an important national public infrastructure, highway construction requires a lot of capital investment as a support, but the highway has been a lack of funds is a major problem facing. Based on the domestic and international comparative analysis of highway financing mode, from both theoretical and practical aspects of the analysis of highway financing issues were discussed, and combine with the characteristics of highway financing system, propose suitable means of financing the construction of highway.
基金Supported by the China Postdoctoral Science Foundation(No.2014M552115)the Fundamental Research Funds for the Central Universities,ChinaUniversity of Geosciences(Wuhan)(No.CUGL140833)the National Key Technology Support Program of China(No.2011BAH06B04)
文摘In order to improve the concurrent access performance of the web-based spatial computing system in cluster,a parallel scheduling strategy based on the multi-core environment is proposed,which includes two levels of parallel processing mechanisms.One is that it can evenly allocate tasks to each server node in the cluster and the other is that it can implement the load balancing inside a server node.Based on the strategy,a new web-based spatial computing model is designed in this paper,in which,a task response ratio calculation method,a request queue buffer mechanism and a thread scheduling strategy are focused on.Experimental results show that the new model can fully use the multi-core computing advantage of each server node in the concurrent access environment and improve the average hits per second,average I/O Hits,CPU utilization and throughput.Using speed-up ratio to analyze the traditional model and the new one,the result shows that the new model has the best performance.The performance of the multi-core server nodes in the cluster is optimized;the resource utilization and the parallel processing capabilities are enhanced.The more CPU cores you have,the higher parallel processing capabilities will be obtained.
