This paper proposes an extractive generic text summarization model that generates summaries by selecting sentences according to their scores. Sentence scores are calculated using their extensive coverage of the main c...This paper proposes an extractive generic text summarization model that generates summaries by selecting sentences according to their scores. Sentence scores are calculated using their extensive coverage of the main content of the text, and summaries are created by extracting the highest scored sentences from the original document. The model formalized as a multiobjective integer programming problem. An advantage of this model is that it can cover the main content of source (s) and provide less redundancy in the generated sum- maries. To extract sentences which form a summary with an extensive coverage of the main content of the text and less redundancy, have been used the similarity of sentences to the original document and the similarity between sentences. Performance evaluation is conducted by comparing summarization outputs with manual summaries of DUC2004 dataset. Experiments showed that the proposed approach outperforms the related methods.展开更多
As the influence of English as a world language is becoming very powerful,many researchers have focused on the rela⁃tionship between the financial condition of the student family and English proficiency.Consequences w...As the influence of English as a world language is becoming very powerful,many researchers have focused on the rela⁃tionship between the financial condition of the student family and English proficiency.Consequences were very significant:the im⁃pact of family economic conditions on children's English academic achievement is very critical.An alternative to problem-solving is the provision of various training programs that can improve a teacher's English skills.展开更多
目的:建立硫酸氢氯吡格雷原料药中所含7种有机溶剂(甲苯、四氢呋喃、正己烷、甲醇、二氯甲烷、丙酮和异丙醇)残留量的测定方法。方法:以DB-1毛细管柱(30 m×0.32 mm, 3.0μm)为色谱柱,程序升温,火焰离子化检测器。进样口温度为200℃...目的:建立硫酸氢氯吡格雷原料药中所含7种有机溶剂(甲苯、四氢呋喃、正己烷、甲醇、二氯甲烷、丙酮和异丙醇)残留量的测定方法。方法:以DB-1毛细管柱(30 m×0.32 mm, 3.0μm)为色谱柱,程序升温,火焰离子化检测器。进样口温度为200℃,分流比为5∶1,检测器温度为270℃。载气为高纯N_(2),恒流控制,流速为4 mL·min^(-1)。顶空进样器的平衡温度为85℃,平衡时间为20 min。结果:7种溶剂均能完全分离,各组分的质量浓度与峰面积呈良好的线性关系(r>0.999 3),方法的专属性、重复性和准确度均符合要求。结论:本法适用于硫酸氢氯吡格雷原料药中有机溶剂残留量的测定。展开更多
文摘This paper proposes an extractive generic text summarization model that generates summaries by selecting sentences according to their scores. Sentence scores are calculated using their extensive coverage of the main content of the text, and summaries are created by extracting the highest scored sentences from the original document. The model formalized as a multiobjective integer programming problem. An advantage of this model is that it can cover the main content of source (s) and provide less redundancy in the generated sum- maries. To extract sentences which form a summary with an extensive coverage of the main content of the text and less redundancy, have been used the similarity of sentences to the original document and the similarity between sentences. Performance evaluation is conducted by comparing summarization outputs with manual summaries of DUC2004 dataset. Experiments showed that the proposed approach outperforms the related methods.
文摘As the influence of English as a world language is becoming very powerful,many researchers have focused on the rela⁃tionship between the financial condition of the student family and English proficiency.Consequences were very significant:the im⁃pact of family economic conditions on children's English academic achievement is very critical.An alternative to problem-solving is the provision of various training programs that can improve a teacher's English skills.
