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Reinfection rates among patients previously infected by SARS-CoV-2: systematic review and meta-analy
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心率震荡（heart rate turbulence，HRT）的病理生理机制至今仍未完全阐明，一些资料表明其与压力反射敏感性高度相关，且与心率变异性（heart ......
Abstract:People think that American family is quite different from Chinese family .In fact, if we take a chronological l......
Abstract ［Objectives］ This study was conducted to investigate the effects of compound photorespiration inhibitors on relat......
Diurnal Variation of Photosynthetic Physiological Characteristics of Kadsura coccinea (Lem.) A. C. S
Abstract [Objectives] This study was conducted to investigate the diurnal variations of photosynthetic and physiological......
A proper waste management system is very important in healthcare facilities because the overall benefit outweighs the co......
This article considers a semiparametric varying-coefficient partially linear regression model.The semiparametric varying......
目前我国拥有能谱仪的单位不少,随着时间的推移。仪器的故障发生率在增加,设备的维修工作,已经成为各用户较为关心的问题。我们在......
The computational flow rate feedback and control method,which can be used in proportional valve controlled hydraulic ele......
Artificial neural networks (ANNs) have been widely used as a promising alternative approach for forecast task because o......
在对某电厂一台420t电站锅炉检验过程中，发现该锅炉水冷壁管存在结垢现象，水冷壁管垢下腐蚀会对锅炉的安全、经济运行造成影响。通过......
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该文从挂篮荷载计算、施工流程、支座及临时固结施工、挂篮安装及试验、合拢段施工、模板制作安装、钢筋安装、混凝土的浇筑及养生......
为探究吕家坨井田地质构造格局,根据钻孔勘探资料,采用分形理论和趋势面分析方法,研究了井田7......
The free radical scavenging activities of puerarin towards nitrogen dioxide radicals , nitric oxide radicals (NO·) ......
Explaining the influence of dopant concentration and excitation power density on the luminescence an
为探究吕家坨井田地质构造格局,根据钻孔勘探资料,采用分形理论和趋势面分析方法,研究了井田7......
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目的 研究不同碘水平对哺乳期母鼠和仔鼠的碘代谢及甲状腺功能的影响.方法 Wistar母鼠随机分为4组:重度缺碘组(SID),轻度缺碘组(M......
Abstract [Objective] The aim was to investigate the hemostatic effects of chitosan- based fibre on liver. [Method] The l......
采用全结晶工艺对原料桉叶油[w(cineole)=63.24%]进行分离提纯，在无晶种添加下，降温速率4℃/h、结晶终温?30℃、发汗速率5℃/h、发汗......
目的：了解呼和浩特市50岁以上居民高血压患病现状及相关因素。方法：采用分层随机抽样法，选取呼和浩特市50岁以上居民509人进行研究。......
目的 了解江阴市18岁以上居民高血压患病现状及相关危险因素,为政府制定高血压防治策略提供科学依据.方法 采用多阶段随机分层整群......
目的了解石家庄市新华区成年居民的高血压患病、知晓、治疗、控制情况,评估防治现状,完善防治措施。方法以2010年《中国居民营养与......
The concentrations of 56 hydrocarbons from C2 to C12 were measured simultaneously in the southbound bore, the northbound......
本文通过大量实际资料分析认为，现代全球变暖与海平面上升，源于200多年前小冰期冷峰出现后的气候返暖、海平面回升过程演变的结果。......
A set of ＂three high and one ensuring＂ cultivation mode of double cropping rice, the core of which was high panicle bearin......
The rate equations for the intracavity-frequency-doubled quasi-three-level lasers are developed. By normalizing the rela......
通过定容变压法研究了不同温度(25～150℃)与初始压力(10～160 kPa)对Zr9Ni11合金吸氢性能的影响.氢化实验结果表明,随着温度的升高,Zr......
