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Journal of Zhejiang University. Science最新文献

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Chaotic phenomenon and the maximum predictable time scale of observation series of urban hourly water consumption. 城市逐时用水量观测序列的混沌现象与最大可预测时间尺度。
Journal of Zhejiang University. Science Pub Date : 2004-09-01 DOI: 10.1631/jzus.2004.1053
Jing-qing Liu, Tu-qiao Zhang, Shen-kai Yu
{"title":"Chaotic phenomenon and the maximum predictable time scale of observation series of urban hourly water consumption.","authors":"Jing-qing Liu, Tu-qiao Zhang, Shen-kai Yu","doi":"10.1631/jzus.2004.1053","DOIUrl":"https://doi.org/10.1631/jzus.2004.1053","url":null,"abstract":"The chaotic characteristics and maximum predictable time scale of the observation series of hourly water consumption in Hangzhou were investigated using the advanced algorithm presented here is based on the conventional Wolf’s algorithm for the largest Lyapunov exponent. For comparison, the largest Lyapunov exponents of water consumption series with one-hour and 24-hour intervals were calculated respectively. The results indicated that chaotic characteristics obviously exist in the hourly water consumption system; and that observation series with 24-hour interval have longer maximum predictable scale than hourly series. These findings could have significant practical application for better prediction of urban hourly water consumption.","PeriodicalId":85042,"journal":{"name":"Journal of Zhejiang University. Science","volume":"5 9","pages":"1053-9"},"PeriodicalIF":0.0,"publicationDate":"2004-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1631/jzus.2004.1053","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"24647553","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 9
Improving the precision of the keyword-matching pornographic text filtering method using a hybrid model. 利用混合模型提高关键字匹配色情文本过滤方法的精度。
Journal of Zhejiang University. Science Pub Date : 2004-09-01 DOI: 10.1631/jzus.2004.1106
Gui-yang Su, Jian-hua Li, Ying-hua Ma, Sheng-hong Li
{"title":"Improving the precision of the keyword-matching pornographic text filtering method using a hybrid model.","authors":"Gui-yang Su,&nbsp;Jian-hua Li,&nbsp;Ying-hua Ma,&nbsp;Sheng-hong Li","doi":"10.1631/jzus.2004.1106","DOIUrl":"https://doi.org/10.1631/jzus.2004.1106","url":null,"abstract":"<p><p>With the flooding of pornographic information on the Internet, how to keep people away from that offensive information is becoming one of the most important research areas in network information security. Some applications which can block or filter such information are used. Approaches in those systems can be roughly classified into two kinds: metadata based and content based. With the development of distributed technologies, content based filtering technologies will play a more and more important role in filtering systems. Keyword matching is a content based method used widely in harmful text filtering. Experiments to evaluate the recall and precision of the method showed that the precision of the method is not satisfactory, though the recall of the method is rather high. According to the results, a new pornographic text filtering model based on reconfirming is put forward. Experiments showed that the model is practical, has less loss of recall than the single keyword matching method, and has higher precision.</p>","PeriodicalId":85042,"journal":{"name":"Journal of Zhejiang University. Science","volume":"5 9","pages":"1106-13"},"PeriodicalIF":0.0,"publicationDate":"2004-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1631/jzus.2004.1106","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"24646883","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 22
Improvement of Laih and Yen's multisignature scheme. Laih和Yen多重签名方案的改进。
Journal of Zhejiang University. Science Pub Date : 2004-09-01 DOI: 10.1631/jzus.2004.1155
Qi Xie, Xiu-yuan Yu
{"title":"Improvement of Laih and Yen's multisignature scheme.","authors":"Qi Xie,&nbsp;Xiu-yuan Yu","doi":"10.1631/jzus.2004.1155","DOIUrl":"https://doi.org/10.1631/jzus.2004.1155","url":null,"abstract":"<p><p>A new attack is proposed to show that a specified group of verifiers can cooperate to forge the signature for any message by secret key substitution due to the leaked secret key or by the group public key adjustment because of the renewed members. This paper presents the improvement scheme which overcomes the security weakness of Laih and Yen's scheme.</p>","PeriodicalId":85042,"journal":{"name":"Journal of Zhejiang University. Science","volume":"5 9","pages":"1155-9"},"PeriodicalIF":0.0,"publicationDate":"2004-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1631/jzus.2004.1155","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"24646890","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 5
Potential theory method for 3D crack and contact problems of multi-field coupled media: a survey. 多场耦合介质三维裂纹与接触问题的势理论方法综述。
Journal of Zhejiang University. Science Pub Date : 2004-09-01 DOI: 10.1631/jzus.2004.1009
Wei-qiu Chen, Hao-jiang Ding
{"title":"Potential theory method for 3D crack and contact problems of multi-field coupled media: a survey.","authors":"Wei-qiu Chen,&nbsp;Hao-jiang Ding","doi":"10.1631/jzus.2004.1009","DOIUrl":"https://doi.org/10.1631/jzus.2004.1009","url":null,"abstract":"<p><p>This paper presents an overview of the recent progress of potential theory method in the analysis of mixed boundary value problems mainly stemming from three-dimensional crack or contact problems of multi-field coupled media. This method was used to derive a series of exact three dimensional solutions which should be of great theoretical significance because most of them usually cannot be derived by other methods such as the transform method and the trial-and-error method. Further, many solutions are obtained in terms of elementary functions that enable us to treat more complicated problems easily. It is pointed out here that the method is usually only applicable to media characterizing transverse isotropy, from which, however, the results for the isotropic case can be readily obtained.</p>","PeriodicalId":85042,"journal":{"name":"Journal of Zhejiang University. Science","volume":"5 9","pages":"1009-21"},"PeriodicalIF":0.0,"publicationDate":"2004-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1631/jzus.2004.1009","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"24646388","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 28
Stable response of axisymmetric two-phase water-saturated soil. 轴对称两相饱和水土的稳定响应。
Journal of Zhejiang University. Science Pub Date : 2004-09-01 DOI: 10.1631/jzus.2004.1022
Yuan-qiang Cai, Kai Meng, Chang-jie Xu
{"title":"Stable response of axisymmetric two-phase water-saturated soil.","authors":"Yuan-qiang Cai,&nbsp;Kai Meng,&nbsp;Chang-jie Xu","doi":"10.1631/jzus.2004.1022","DOIUrl":"https://doi.org/10.1631/jzus.2004.1022","url":null,"abstract":"<p><p>Biot's dynamic consolidation equations and Hankel transform were used to derive the integral solutions of stress and displacement for axisymmetric harmonic excitations in the two-phase saturated soil with subjacent rock-stratum. The influence of the coefficient of permeability and loading frequency on the soil displacement at the ground surface were studied. The results showed that higher loading frequency led to more dynamic characteristics; and that the effect of the soil permeability was more obvious at higher frequencies.</p>","PeriodicalId":85042,"journal":{"name":"Journal of Zhejiang University. Science","volume":"5 9","pages":"1022-7"},"PeriodicalIF":0.0,"publicationDate":"2004-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1631/jzus.2004.1022","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"24646389","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 9
Residential environment index system and evaluation model established by subjective and objective methods. 采用主客观相结合的方法建立了居住环境指标体系和评价模型。
Journal of Zhejiang University. Science Pub Date : 2004-09-01 DOI: 10.1631/jzus.2004.1028
Jian Ge, Kazunori Hokao
{"title":"Residential environment index system and evaluation model established by subjective and objective methods.","authors":"Jian Ge,&nbsp;Kazunori Hokao","doi":"10.1631/jzus.2004.1028","DOIUrl":"https://doi.org/10.1631/jzus.2004.1028","url":null,"abstract":"<p><p>In this research, the residential environment index system and evaluation model were established by means of subjective and objective methods. The methodology for establishing the evaluation system for residential environment was first analyzed; then the subjective evaluation data-base was established by questionnaire survey; and at the same time, the objective evaluation data-base was constructed by Geographic Information System (GIS); and then the related equation system between subjective and objective system was developed by multiple regression analysis. This research could benefit evaluation of the residential environment quality for various purposes, and also provide important rudimentary data-base for the development and improvement of residential environment for officials. Furthermore, the index system and evaluation model established in this research could construct a strong relation between subjective evaluation and objective data; and thus could provide a comprehensive, efficient and effective methodology for the evaluation of residential environment.</p>","PeriodicalId":85042,"journal":{"name":"Journal of Zhejiang University. Science","volume":"5 9","pages":"1028-34"},"PeriodicalIF":0.0,"publicationDate":"2004-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1631/jzus.2004.1028","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"24646390","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 24
Water-dispersed bone morphogenetic protein nanospheres prepared by co-precipitation method. 共沉淀法制备水分散骨形态发生蛋白纳米球。
Journal of Zhejiang University. Science Pub Date : 2004-08-01 DOI: 10.1007/BF02947602
Bing-Bing Jiang, Chang-You Gao, Ling Hu, Jia-Cong Shen
{"title":"Water-dispersed bone morphogenetic protein nanospheres prepared by co-precipitation method.","authors":"Bing-Bing Jiang,&nbsp;Chang-You Gao,&nbsp;Ling Hu,&nbsp;Jia-Cong Shen","doi":"10.1007/BF02947602","DOIUrl":"https://doi.org/10.1007/BF02947602","url":null,"abstract":"","PeriodicalId":85042,"journal":{"name":"Journal of Zhejiang University. Science","volume":"5 8","pages":"936-940"},"PeriodicalIF":0.0,"publicationDate":"2004-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1007/BF02947602","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"24599961","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 4
Water-soluble UV curable urethane methyl acrylate coating: preparation and properties. 水溶性UV固化聚氨酯丙烯酸甲酯涂料:制备及性能。
Journal of Zhejiang University. Science Pub Date : 2004-08-01 DOI: 10.1007/BF02947596
Yan-Yan Wei, Ying-Wu Ruo, Bao-Fang Li, Bo-Geng Li
{"title":"Water-soluble UV curable urethane methyl acrylate coating: preparation and properties.","authors":"Yan-Yan Wei,&nbsp;Ying-Wu Ruo,&nbsp;Bao-Fang Li,&nbsp;Bo-Geng Li","doi":"10.1007/BF02947596","DOIUrl":"https://doi.org/10.1007/BF02947596","url":null,"abstract":"<p><p>Two kinds of water-soluble and ultraviolet (UV) curable oligomers were synthesized and characterized. The oligomers were evaluated as resins for water-based UV curable coating. The rheology of the two oligomers' aqueous solutions was investigated in terms of solid fraction, pH dependence, and temperature dependence. The solutions were found to be Newtonian fluid showing rather low viscosity even at high solid fraction of 0.55. The drying process of the coatings and the properties of the cured coatings were studied by comparing them with water-dispersed UV-curable polyurethane methyl acrylate. It was evident that the water-soluble coating dried more slowly; and that the overall properties were inferior to those of the water-dispersed coating.</p>","PeriodicalId":85042,"journal":{"name":"Journal of Zhejiang University. Science","volume":"5 8","pages":"906-11"},"PeriodicalIF":0.0,"publicationDate":"2004-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1007/BF02947596","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"24599520","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 7
Study of CNG/diesel dual fuel engine's emissions by means of RBF neural network. 基于RBF神经网络的CNG/柴油双燃料发动机排放研究。
Journal of Zhejiang University. Science Pub Date : 2004-08-01 DOI: 10.1007/BF02947606
Zhen-tao Liu, Shao-mei Fei
{"title":"Study of CNG/diesel dual fuel engine's emissions by means of RBF neural network.","authors":"Zhen-tao Liu,&nbsp;Shao-mei Fei","doi":"10.1007/BF02947606","DOIUrl":"https://doi.org/10.1007/BF02947606","url":null,"abstract":"","PeriodicalId":85042,"journal":{"name":"Journal of Zhejiang University. Science","volume":" ","pages":"960-965"},"PeriodicalIF":0.0,"publicationDate":"2004-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1007/BF02947606","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"40909938","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 24
Theoretical study of NO adsorbed on the surface of TiO2(110) cluster model. NO吸附在TiO2(110)表面团簇模型的理论研究。
Journal of Zhejiang University. Science Pub Date : 2004-08-01 DOI: 10.1007/BF02947601
Yang Wang, Yasunori Yanagisawa
{"title":"Theoretical study of NO adsorbed on the surface of TiO2(110) cluster model.","authors":"Yang Wang,&nbsp;Yasunori Yanagisawa","doi":"10.1007/BF02947601","DOIUrl":"https://doi.org/10.1007/BF02947601","url":null,"abstract":"","PeriodicalId":85042,"journal":{"name":"Journal of Zhejiang University. Science","volume":"5 8","pages":"932-935"},"PeriodicalIF":0.0,"publicationDate":"2004-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1007/BF02947601","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"24599525","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
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