目的系统评价全膝关节置换术后慢性疼痛相关危险因素,为更好地预防和管理全膝置换术后疼痛提供循证证据。方法计算机检索中国知网、万方数据库、维普网、PubMed、Embase、Cochrane Library、Web of Science等数据库,收集有关全膝关节置...目的系统评价全膝关节置换术后慢性疼痛相关危险因素,为更好地预防和管理全膝置换术后疼痛提供循证证据。方法计算机检索中国知网、万方数据库、维普网、PubMed、Embase、Cochrane Library、Web of Science等数据库,收集有关全膝关节置换术后慢性疼痛危险因素的队列或病例对照研究,检索时限均为建库起至2023年6月。根据纳排标准,筛选并提取纳入文献的基本信息,予以质量评估并偏倚分析。采用RevMan 5.4软件对数据进行Meta分析。结果最终纳入文献11篇,中文文献4篇,英文文献7篇,包括患者2669例,实验组816例,对照组1853例。Meta分析的结果显示,性别、教育水平、种族、特质焦虑、WOMAC骨性关节炎指数、NRS疼痛评分是全膝关节置换术后慢性疼痛的高危因素(P<0.05)。结论性别、教育水平、种族、特质焦虑指数、术前WOMAC评分、术前NRS评分为全膝关节置换术后慢性疼痛的独立危险因素,临床医师可重点识别并针对性控制高危因素,并对可干预因素予以针对性控制,以预防或减少人工全膝关节置换术后慢性疼痛的发生。展开更多
Given the public concern over the safety of genetically modified (GM) technology and products, the article elaborated the safety regulatory and administration on agricultural GMOs in China. China has made a set of l...Given the public concern over the safety of genetically modified (GM) technology and products, the article elaborated the safety regulatory and administration on agricultural GMOs in China. China has made a set of laws and regulations of GMO safety management and confirmed competent authorities with clear-cut responsibilities. According to the laws and regulations, GMO products before entering markets have to pass through safety evaluation, get production and processing permission and be labeled correctly. For the importation of GM products, China has set up an import approval system. In addition, China has established technical supportive systems, including safety evaluation specifications, trial specifications and criteria specifications. The existing regulatory system supervises and regulates all activities and work related to agri- cultural GMOs in China.展开更多
文摘目的系统评价全膝关节置换术后慢性疼痛相关危险因素,为更好地预防和管理全膝置换术后疼痛提供循证证据。方法计算机检索中国知网、万方数据库、维普网、PubMed、Embase、Cochrane Library、Web of Science等数据库,收集有关全膝关节置换术后慢性疼痛危险因素的队列或病例对照研究,检索时限均为建库起至2023年6月。根据纳排标准,筛选并提取纳入文献的基本信息,予以质量评估并偏倚分析。采用RevMan 5.4软件对数据进行Meta分析。结果最终纳入文献11篇,中文文献4篇,英文文献7篇,包括患者2669例,实验组816例,对照组1853例。Meta分析的结果显示,性别、教育水平、种族、特质焦虑、WOMAC骨性关节炎指数、NRS疼痛评分是全膝关节置换术后慢性疼痛的高危因素(P<0.05)。结论性别、教育水平、种族、特质焦虑指数、术前WOMAC评分、术前NRS评分为全膝关节置换术后慢性疼痛的独立危险因素,临床医师可重点识别并针对性控制高危因素,并对可干预因素予以针对性控制,以预防或减少人工全膝关节置换术后慢性疼痛的发生。
文摘针对多通道四类运动想象(Motor imagery,MI)脑电信号(Electroencephalography,EEG)的分类问题,提出免疫多域特征融合的多核学习SVM(Support vector machine)运动想象脑电信号分类算法.首先,通过离散小波变换(Discrete wavelet transform,DWT)提取脑电信号的时频域特征,并利用一对多公共空间模式(One versus the rest common spatial patterns,OVR-CSP)提取脑电信号的空域特征,融合时频空域特征形成特征向量.其次,利用多核学习支持向量机(Multiple kernel learning support vector machine,MKL-SVM)对提取的特征向量进行分类.最后,利用免疫遗传算法(Immune genetic algorithm,IGA)对模型的相关参数进行优化,得到识别率更高的脑电信号分类模型.采用BCI2005desc-Ⅲa数据集进行实验验证,对比结果表明,本文所提出的分类模型有效地解决了传统单域特征提取算法特征单一、信息描述不足的问题,更准确地表达了不同受试者个性化的多域特征,取得了94.21%的识别率,优于使用相同数据集的其他方法.
文摘Given the public concern over the safety of genetically modified (GM) technology and products, the article elaborated the safety regulatory and administration on agricultural GMOs in China. China has made a set of laws and regulations of GMO safety management and confirmed competent authorities with clear-cut responsibilities. According to the laws and regulations, GMO products before entering markets have to pass through safety evaluation, get production and processing permission and be labeled correctly. For the importation of GM products, China has set up an import approval system. In addition, China has established technical supportive systems, including safety evaluation specifications, trial specifications and criteria specifications. The existing regulatory system supervises and regulates all activities and work related to agri- cultural GMOs in China.