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- Cumulative incidence ratio (CIR), incidence density ratio (IDR)and incidence odds ratio(IOR)can be calculated respectively in cohort study according to various study designs. 根據不同的研究設計,在隊列研究中可分別估計累積發(fā)病率比(CIR)、發(fā)病密度比(IDR)和發(fā)病比值(IOR)。
- incidence density ratio 發(fā)病密度比
- The incidence density of lung cancer among Patients with and without emphysema on LDCT was estimated. 研究者進(jìn)行了在LDCT存在肺氣腫和無(wú)肺氣腫患者中肺癌發(fā)病密度的評估。
- The influence of density ratio on the characteristic frequency of coherent structure on the centreline of low Re number free round jet flow has been investigated with Dual PDA. 采用激光粒子動(dòng)態(tài)分析儀研究了低雷諾數時(shí)密度比對自由圓射流近噴嘴區軸線(xiàn)相干結構特征頻率的影響。
- The strain energy density ratio criterion for predicting cracking direction in composite materials is proposed. The Tsai-Hill criterion and Norris criterion of composite materials are extended to predict the cracking direction in compsites. 本文提出預測復合材料中裂紋方向的比應變能密度準則;并將Tsai-Hill與Norris準則擴展來(lái)預測復合材料中的開(kāi)裂方向.
- An investigation was conducted to explore the influence of density ratio and velocity ratio of mainstream/injectant upon the cooling effect of flat plane film using heat-mass transfer analogy. 摘要采用傳熱傳質(zhì)類(lèi)比的方法研究主射流密度差和速度比對單排孔平板氣膜冷卻效率的影響。
- signal-to-noise power density ratio 信噪功率密度比
- carrier to spectral noise density ratio 載波噪聲譜密度比
- bit energy-to-noise density ratio 比特能量噪聲密度比
- Magnesium composites, possessing high strength to density ratios, stiffness to density ratios, excellent mechanical and physical properties, are ideal materials for defense high-tech fields. 鎂合金材料有高的比強度、比剛度,優(yōu)異的阻尼減震、電磁屏蔽等性能,是高新技術(shù)行業(yè)的理想材料之一。
- The rate of incidence of a disease. 發(fā)病率發(fā)生疾病的概率
- There's a high incidence of heart disease there. 那個(gè)地方心臟病的發(fā)病率很高。
- Risk Factors Adjusted Incidence Density of Nosocomial Infection: Their Calculation and Epidemiological Significance 危險因素調整的醫院感染發(fā)病密度的計算方法及其流行病學(xué)意義
- The incidence of cases of rape have increase over the last year. 強奸案的發(fā)案率在去年有所增加。
- Experimental Verification of the Criterion of Strain Energy Density Ratio 比應變能密度準則的實(shí)驗驗證
- The ratio of students to teachers is 35:1. 學(xué)生和老師的比率是三十五比一。
- The ratio of schoolboys to schoolgirls is 2 to 1. 男學(xué)生和女學(xué)生的比例是2比1。
- The density of population in this city is very high. 這個(gè)城市的人口密度非常高。
- Men outnumber women here in the ratio of three to one. 此地男子數量以三比一超過(guò)女子。
- The first or last term of a ratio or a series. 首項,末項比率或數列中第一個(gè)或最后一個(gè)項