Content extraction of HTML pages is the basis of the web page clustering and information retrieval,so it is necessary to eliminate cluttered information and very important to extract content of pages accurately.A nove...Content extraction of HTML pages is the basis of the web page clustering and information retrieval,so it is necessary to eliminate cluttered information and very important to extract content of pages accurately.A novel and accurate solution for extracting content of HTML pages was proposed.First of all,the HTML page is parsed into DOM object and the IDs of all leaf nodes are generated.Secondly,the score of each leaf node is calculated and the score is adjusted according to the relationship with neighbors.Finally,the information blocks are found according to the definition,and a universal classification algorithm is used to identify the content blocks.The experimental results show that the algorithm can extract content effectively and accurately,and the recall rate and precision are 96.5% and 93.8%,respectively.展开更多
可截取签名允许签名人根据需要,在不与原始签名人交互的情况下删除已签名中的敏感数据块,并为截取后的数据计算一个公开并且可验证的签名.目前大多数可截取签名方案都是基于传统数论的困难假设构造的,鉴于量子计算机可能构成的威胁,构...可截取签名允许签名人根据需要,在不与原始签名人交互的情况下删除已签名中的敏感数据块,并为截取后的数据计算一个公开并且可验证的签名.目前大多数可截取签名方案都是基于传统数论的困难假设构造的,鉴于量子计算机可能构成的威胁,构造能够抵抗量子计算攻击的可截取签名方案尤为重要.因此基于格的Ring-SIS(ring short integer solution)问题,提出一种理想格上基于身份的可截取签名方案,证明了该方案在选择身份和消息攻击下存在不可伪造性和隐私性.理论分析和效率分析表明,相较于同类方案,该方案在功能性上同时具备身份认证、隐私性和抗量子攻击等多种功能,用户公钥尺寸更短、安全性更高、算法耗时更低.展开更多
Employing the orthogonal design,the optimal extraction conditions for flavonoid in leaves of black currant were determined by colorimetric estimation,which were extraction agent of 75% EtOH-H 2O,the material ratio(ra...Employing the orthogonal design,the optimal extraction conditions for flavonoid in leaves of black currant were determined by colorimetric estimation,which were extraction agent of 75% EtOH-H 2O,the material ratio(ratio of weight of fresh leaves to volume of the solvent)of 1:16,the temperature of 35℃,the time of 1 h and times of three.A total extraction rate of over 97% and the flavonoid contents of 179 33 mg/100 g were obtained under the optimal extraction conditions.展开更多
基金Project(2012BAH18B05) supported by the Supporting Program of Ministry of Science and Technology of China
文摘Content extraction of HTML pages is the basis of the web page clustering and information retrieval,so it is necessary to eliminate cluttered information and very important to extract content of pages accurately.A novel and accurate solution for extracting content of HTML pages was proposed.First of all,the HTML page is parsed into DOM object and the IDs of all leaf nodes are generated.Secondly,the score of each leaf node is calculated and the score is adjusted according to the relationship with neighbors.Finally,the information blocks are found according to the definition,and a universal classification algorithm is used to identify the content blocks.The experimental results show that the algorithm can extract content effectively and accurately,and the recall rate and precision are 96.5% and 93.8%,respectively.
文摘可截取签名允许签名人根据需要,在不与原始签名人交互的情况下删除已签名中的敏感数据块,并为截取后的数据计算一个公开并且可验证的签名.目前大多数可截取签名方案都是基于传统数论的困难假设构造的,鉴于量子计算机可能构成的威胁,构造能够抵抗量子计算攻击的可截取签名方案尤为重要.因此基于格的Ring-SIS(ring short integer solution)问题,提出一种理想格上基于身份的可截取签名方案,证明了该方案在选择身份和消息攻击下存在不可伪造性和隐私性.理论分析和效率分析表明,相较于同类方案,该方案在功能性上同时具备身份认证、隐私性和抗量子攻击等多种功能,用户公钥尺寸更短、安全性更高、算法耗时更低.
文摘Employing the orthogonal design,the optimal extraction conditions for flavonoid in leaves of black currant were determined by colorimetric estimation,which were extraction agent of 75% EtOH-H 2O,the material ratio(ratio of weight of fresh leaves to volume of the solvent)of 1:16,the temperature of 35℃,the time of 1 h and times of three.A total extraction rate of over 97% and the flavonoid contents of 179 33 mg/100 g were obtained under the optimal extraction conditions.
