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基于评论树的微博社区热门话题检测方法 被引量:4
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作者 崔瑞飞 于洪涛 +1 位作者 杨赟 李星 《计算机应用研究》 CSCD 北大核心 2014年第12期3776-3779,3827,共5页
首先在分析微博文本特点的基础上设计了一种垃圾微博的过滤算法;针对微博数据稀疏性这一问题,利用社区内部联系紧密的特性,提出了微博评论树的概念和一种话题热度评价模型。最后基于以上两点提出了一种微博社区热门话题检测方法。真实... 首先在分析微博文本特点的基础上设计了一种垃圾微博的过滤算法;针对微博数据稀疏性这一问题,利用社区内部联系紧密的特性,提出了微博评论树的概念和一种话题热度评价模型。最后基于以上两点提出了一种微博社区热门话题检测方法。真实数据集上的实验表明了过滤的必要性和所提出的微博社区热门话题检测方法的有效性。 展开更多
关键词 微博社区 热门话题 过滤 评论树 话题热度评价模型
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Threat Modeling-Oriented Attack Path Evaluating Algorithm
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作者 李晓红 刘然 +1 位作者 冯志勇 何可 《Transactions of Tianjin University》 EI CAS 2009年第3期162-167,共6页
In order to evaluate all attack paths in a threat tree,based on threat modeling theory,a weight distribution algorithm of the root node in a threat tree is designed,which computes threat coefficients of leaf nodes in ... In order to evaluate all attack paths in a threat tree,based on threat modeling theory,a weight distribution algorithm of the root node in a threat tree is designed,which computes threat coefficients of leaf nodes in two ways including threat occurring possibility and the degree of damage.Besides,an algorithm of searching attack path was also obtained in accordence with its definition.Finally,an attack path evaluation system was implemented which can output the threat coefficients of the leaf nodes in a target threat tree,the weight distribution information,and the attack paths.An example threat tree is given to verify the effectiveness of the algorithms. 展开更多
关键词 attack tree attack path threat modeling threat coefficient attack path evaluation
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Injections of ginkgo in the treatment of cerebral infarction: a systematic review and network Meta-analysis 被引量:12
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作者 Tan Di Wu Jiarui +4 位作者 Liu Shi Zhang Dan Cui Yingying Zhang Xiaomeng Zhang Bing 《Journal of Traditional Chinese Medicine》 SCIE CAS CSCD 2018年第1期1-11,共11页
OBJECTIVE: To assess the clinical effectiveness and safety of injections of ginkgo (GI) combined with Western Medicine (WM) for cerebral infarction (C/). METHODS; Randomized controlled trials (RCTs) of C/trea... OBJECTIVE: To assess the clinical effectiveness and safety of injections of ginkgo (GI) combined with Western Medicine (WM) for cerebral infarction (C/). METHODS; Randomized controlled trials (RCTs) of C/treated by GI were searched in China National Knowledge Infrastructure Database, Wanfang, China Science and Technology Journal Database, Web of Science, Cochrane library, Embase, PubMed and Chinese Biomedical Literature Database, with the publication data no later than April, 2016. The Co- chrane risk of bias method was used to evaluate the methodological quality of the RCTs. The data were analyzed by Review Manager 5.3, Stata 13.0, and WinBUGS 14 software.RESULTS: Totally 37 RCTs involving 4330 patients were included. By direct comparison, the results of GI group were significantly superior to the routine WM group in the total effective rates [OR = 3.61, 95% CI (2.93, 4.44), P 〈 0.0001], the neural function defect score (NFDS) [MD = - 4.39, 95% CI (- 5.47, - 3.32), P 〈 0.0001]. Network Meta-analysis (NMA) results showed that, between S GIs in efficacy, the difference comparing ginaton injections (GbE) to ginkgo-dipyidamolum injections (GD) [OR = 1.74, 95% CI (0.73, 3.65)], shuxuening injections (SXN) [OR = 1.06, 95% CI (0.609, 1.697)] or ginkgolides in- jections (GK) [OR = 4.711, 95% CI (1.178, 13.21)] reach statistical significance; the difference compar- ing GD to GK reach statistical significance [OR = 2.791, 95% CI (0.866, 6.908)]; the difference com- paring SXN to GK reach statistical significance [OR = 4.537, 95% CI (1.203, 12.41)]. Besides, there was no difference between 4 GIs in NFDS. Proba- bility ranking result showed a great possibility for GK [Surface under the Cumulative Ranking curve (SUCRA) = 80.3%] in improving the total effective rates, which were followed by GD (SUCRA = 73.34%), SXN (SUCRA = 46.59%), GbE (SUCRA = 45.46%), floium ginkgo extract and tertram ethy- pyrazine sodium chloride injections (FT) (SU- CRA = 35.64%). However, GK (SUCRA = 80.3%) or GbE (SUCRA = 69.4%) was better than other GIs in reducing NFDS.GK + WM is the best treatment measures to reduce NFDS in cerebral infarction, which were followed by SXN + WM (SUCRA = 51.6%), GD + WM (SUCRA = 48.1%). CONCLUSION: GIs was more effectiveness on CI than the routine Western Medicine. But based on the limitations of the study, more high-quality ran- domized controlled trials will be necessary. 展开更多
关键词 tnjections Ginkgo biloba Cerebral in-farction Network Meta-analysis REVIEW
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