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基于优势积累的选拔机制与发文率差异 被引量:2
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作者 林啸宇 《科学学研究》 CSSCI 北大核心 2003年第5期470-474,共5页
用中国植物生理学和美国社会学期刊的发文数据对洛特卡规律进行了验证,并设计了一个基于概率优势积累选拔机制的仿真模型,以模拟发文率差异的形成过程。模拟的结果与理论预测和经验数据有较好的吻合。
关键词 科学计量学 积累优势 仿真 选拔机制 科学生产 洛特卡规律 发文数据 发文率
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论核心期刊的评价指标体系 被引量:1
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作者 贺巷超 《洛阳师专学报(自然科学版)》 1993年第3期106-109,共4页
关键词 科技期刊 核心期刊 质量评价 评价指标体系 发文率 载文 文摘
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Total Vertebral Body Breast Cancer Metastases: One Case Report and Literature Review
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作者 Tao Zhang Ling Zhang Hui Gao Peng Cheng Dong Wei 《Clinical oncology and cancer researeh》 CAS CSCD 2009年第6期456-458,共3页
IntroductionBreast cancer is one of the most commonly seen malignant tumors in the female population, and it ranks the first in the incidence of malignancies among women. The skeleton is a common metastatic site for a... IntroductionBreast cancer is one of the most commonly seen malignant tumors in the female population, and it ranks the first in the incidence of malignancies among women. The skeleton is a common metastatic site for advanced breast cancer and is where spinal metastasis is most frequently seen. The incidence rate of spinal metastasis in descending order is as follows: thoracic vertebrae, lumbar vertebrae, sacrococcygeal vertebrae and cervical vertebrae. 展开更多
关键词 all vertebral body metastases breast cancer PETCT.
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Compare the postoperative complications incidence of benign multi-nodular goiter: A meta-analysis
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作者 Pilei Si Yulin Xu +2 位作者 Yi Tu Yi Guo Shengrong Sun 《The Chinese-German Journal of Clinical Oncology》 CAS 2012年第10期575-580,共6页
Objective: The aim of our study was to compare the risk of main postoperative complications of patients un- derwent total thyroidectomy (TT), near total thyroidectomy (NTT) and subtotal thyroidectomy (ST) for t... Objective: The aim of our study was to compare the risk of main postoperative complications of patients un- derwent total thyroidectomy (TT), near total thyroidectomy (NTT) and subtotal thyroidectomy (ST) for treating BMNG. Methods: Electronic databases including Cochrane Controlled Trials Register, EMbase, Medline, SCI Expanded-ISI, NTIS, SIGLE and CNKI were searched. Eligible studies were randomized controlled trials which compared the incidence of postoperative complications of TT with ST/NTT for treating BMNG. Data extraction was using predefined data fields and assessment of methodological quality with the GRADE approach. A ManteI-Haenszel random-effects model was used and the effect sizes were expressed by using relative risks and 95% confidence intervals. Results: Four studies including 881 participants that met inclusion criteria were analyzed. Compared with ST/NTT, TT was associated with increased risk of transient RLNI (recur- rent laryngeal nerve injuries) (relative risk 2.18, 95% confidence interval 1.08 to 4.42; P 〈 0.05) and transient hypocalcemia (3.79, 1.64 to 8.77; P 〈 0.05), but there were no statistically significant differences in permanent RLNI (1.36, 0.31 to 6.02; P 〉 0.05) and permanent hypocalcemia (2.37, 0.35 to 15.97; P 〉 0.05). The quality of evidence for each individual outcome was ultimately rated as moderate (permanent RLNI and permanent hypocalcemia), low (transient RLNI and transient hypocalce- mia). Conclusion: For treating BMNG with thyroidectomy, there were no statistically significant differences in postoperative complications between TT and ST/NTT on a long view. 展开更多
关键词 META-ANALYSIS postoperative complications thyroid nodule THYROIDECTOMY recurrent laryngeal nerve injuries HYPOCALCEMIA
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