使用OWL 2 EL本体实现可扩展且完整的查询解释

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"这篇研究论文探讨了在使用OWL 2 EL本体的语义数据访问和管理系统中,如何实现可扩展且完整的查询解释方法。主要关注于解决在大数据环境中,查询缺失答案的解释问题,这对于数据调试和维护至关重要。当前的查询解释算法存在无法在大规模数据集上扩展或不能确保找出所有期望解释的局限性。" 本文作者包括Zhe Wang、Mahsa Chitsaz、Kewen Wang和Jianfeng Du,分别来自澳大利亚格里菲斯大学的信息与通信技术学院以及中国广东外语外贸大学的思科信息学院。 在OWL 2 EL(OWL 2 Expressive Level)本体框架下,数据访问和管理系统的应用正在迅速发展。这些系统除了基本的查询回答功能外,还要求具备解释能力,特别是对于查询缺失答案的解释,即那些在现有本体和数据中无法推导出的查询结果。这种解释功能在处理大数据时的需求尤为强烈,因为它有助于发现和修复数据问题,保证系统的稳定运行。 现有的查询解释算法存在两大问题:一是处理大规模数据时的性能瓶颈,导致无法有效扩展;二是算法的完整性,即它们可能无法保证找到所有可能的解释。这成为了阻碍系统全面性和效率提升的关键障碍。 论文的目标是克服这些限制,提出一种既能高效处理大量数据,又能确保计算所有期望解释的新方法。这样的解决方案将极大地提高系统在复杂数据环境下的实用性和用户友好性,使得在面对复杂查询时,系统不仅能提供答案,还能清晰地解释为什么某些答案不存在,帮助用户理解数据的内在逻辑和限制。 在论文中,作者可能会深入讨论OWL 2 EL本体语言的特点,分析现有查询解释算法的不足,并介绍他们的新方法如何通过优化数据结构、查询计划或者推理机制来实现可扩展性和完整性。此外,他们可能会通过实验验证新算法的性能,对比其与其他方法的差异,并讨论可能的应用场景和未来的研究方向。 这篇研究论文对提升基于OWL 2 EL本体的语义数据管理系统的能力具有重要意义,它有望推动查询解释技术的发展,更好地服务于大数据环境中的信息管理和分析需求。

Based on the following story, continue the story by writing two paragraphs, paragraph 1 beginning with "A few weeks later, I went to the farm again. " and paragraph 2 beginning with "I was just about to leave when the hummingbird appeared."respectively with 150 words. I was invited to a cookout on an old friend's farm in western Washington. I parked my car outside the farm and walked past a milking house which had apparently not been used in many years.A noise at a window caught my attention,so I entered it. It was a hummingbird,desperately trying to escape. She was covered in spider-webs and was barely able to move her wings. She ceased her struggle the instant I picked her up. With the bird in my cupped hand, I looked around to see how she had gotten in. The broken window glass was the likely answer. I stuffed a piece of cloth into the hole and took her outside,closing the door securely behind me. When I opened my hand, the bird did not fly away; she sat looking at me with her bright eyes.I removed the sticky spider-webs that covered her head and wings. Still, she made no attempt to fly.Perhaps she had been struggling against the window too long and was too tired? Or too thirsty? As I carried her up the blackberry-lined path toward my car where I kept a water bottle, she began to move. I stopped, and she soon took wing but did not immediately fly away. Hovering,she approached within six inches of my face. For a very long moment,this tiny creature looked into my eyes, turning her head from side to side. Then she flew quickly out of sight. During the cookout, I told my hosts about the hummingbird incident. They promised to fix the window. As I was departing, my friends walked me to my car. I was standing by the car when a hummingbird flew to the center of our group and began hovering. She turned from person to person until she came to me. She again looked directly into my eyes, then let out a squeaking call and was gone. For a moment, all were speechless. Then someone said, “She must have come to say good-bye.”

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