Results 141 to 150 of about 68,199 (213)

[Clinical characteristics of late-onset circulatory collapse in preterm infants]. [PDF]

open access: yesZhongguo Dang Dai Er Ke Za Zhi
Huang Y   +5 more
europepmc   +1 more source

[Expert recommendations on antenatal counseling for extremely preterm infants]. [PDF]

open access: yesZhongguo Dang Dai Er Ke Za Zhi
Hunan Neonatal Medical Quality Control Center   +1 more
europepmc   +1 more source

An Equilibrium Analysis under Cobb-Douglas Production and Utility Functions [PDF]

open access: yes
The equilibrium analyses under the classical growth framework mainly concern production processes so far and the utility-maximization of consumers is left out of consideration.
Li, Wu
core   +1 more source

有机肥等氮替代化肥对春玉米生长、产量和水肥利用效率的影响

open access: yesShuitu Baochi Xuebao
[目的] 为探究不同施氮量下有机肥等氮替代化肥对陕北旱区春玉米生长、产量和水肥利用效率的影响。[方法] 采用多元回归分析和三维拟合模型,以期建立陕北地区春玉米种植最佳氮肥管理模式。设置3个施氮水平(N1、N2、N3分别为240,180,120 kg/hm2)和5个有机肥等氮替代比例(R0、R12.5、R25、R37.5、R50分别为100%化肥氮、12.5%有机肥氮+87.5%化肥氮、25%有机肥氮+75%化肥氮、37.5%有机肥氮+62.5%化肥氮、50%有机肥氮+50%化肥氮),共15个处理 ...
陈梦茹   +8 more
doaj  

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