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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. 相似文献
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应用测井、录井、岩心等资料确定鄂尔多斯盆地东缘临兴地区上古生界烃源岩展布特征,通过有机质丰度、类型、成熟度指标对烃源岩进行综合评价,并分析了烃源岩条件对气藏形成与分布的控制作用。研究表明,临兴地区上古生界烃源岩为山西组、太原组和本溪组的煤层及暗色泥岩,其中主力烃源岩为煤层。煤层厚度2. 17～31. 01 m,均值18. 91 m;暗色泥岩厚度16. 93～119. 95 m,均值59. 19 m。烃源岩有机质丰度较高,煤的残余有机碳20. 40%～87. 32%,均值62. 15%,暗色泥岩的残余有机碳0. 09%～38. 60%,均值4. 59%;有机质类型以Ⅲ型干酪根为主,含有部分Ⅱ型干酪根;受紫金山岩体侵入的影响,烃源岩成熟度较高,烃源岩镜质体反射率0. 78%～4. 89%,均值1. 23%,主体处于成熟—高成熟阶段。临兴地区生气强度(10. 22～44. 86)×108m3/km2,与邻区神木气田(生气强度(8～33)×108m3/km2)相比,临兴地区的气源条件优于神木气田。平面上,临兴地区内煤层厚度 11 m,生气强度 11×108m3/km2的区域为工业气流井主要分布区,且在烃源岩条件较好的区域,其含气性也较高;纵向上,天然气垂向运移距离与煤层厚度和生气强度具有一定的正相关性,表现为随煤层厚度、生气强度增大,天然气垂向运移距离更远。 相似文献
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日本科学技术的特征众所周知,近来日本的科学技术已伸向发达国家,允其是在开发批量生产型的优秀商品方面。美国出于军事需要,不惜重金开发出类拔萃的高性能东西,而日本却以批量型商品的优质著目于世,甚至美国国防部也很想引用日本技术。就以轴承、盒式录像机等为例吧,产量虽很大,其精密单位却很微小,为10~(-10)。此精密单位原是用于波长的,日本却把它很好地应用到价 相似文献
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