Results 101 to 110 of about 5,025,195 (135)

[Analysis of the characteristics and changing trends of burn disease burden in the Chinese population based on the GBD 2021 database]. [PDF]

open access: yesZhonghua Shao Shang Yu Chuang Mian Xiu Fu Za Zhi
Liang JY   +9 more
europepmc   +1 more source

模拟降雨条件下农田径流中氮的流失过程

open access: yes, 2001
在室内降雨模拟试验条件下,研究暴雨径流中农田氮素养分流失及施肥处理的影响。结果表明,农田暴雨径流氮养分的流失量与累积径流量成正相关;施用NH4HCO3显著地增大了农田径流中溶解态氮浓度及流失量(P=0.01),而对颗粒态氮浓度及流失量没有显著影响(P=0.1);在大暴雨和裸露地试验条件下,颗粒态氮是农田暴雨径流氮养分流失的主要形态;在44 min降雨径流中,以颗粒态流失的氮达476.3~488.7 mg/m2;侵蚀泥沙有富集氮养分的特点,其富集系数与侵蚀泥沙累积量存在对数线性关系:LOG(ER)=0 ...
唐以剑, 陈喜保, 黄满湘, 章申
core  

[Experience summary of robot-assisted laparoscopic transplant nephrectomy]. [PDF]

open access: yesBeijing Da Xue Xue Bao Yi Xue Ban
Zhang Q   +9 more
europepmc   +1 more source

[Comparative study of the efficacy of subclavian space endoscopic approach and anterior cervical open surgery for the treatment of hyperparathyroidism]. [PDF]

open access: yesLin Chuang Er Bi Yan Hou Tou Jing Wai Ke Za Zhi
Zhang J   +7 more
europepmc   +1 more source

[Joint predictive effect of systolic blood pressure variability and sleep patterns on stroke]. [PDF]

open access: yesZhong Nan Da Xue Xue Bao Yi Xue Ban
Wang X   +5 more
europepmc   +1 more source

暴雨强度与过程对渭北旱塬塬边土壤水分亏缺的调控机制

open access: yesShuitu Baochi Xuebao
目的为阐明塬边土壤水分亏缺的时空演变规律,揭示暴雨(24 h降雨量≥50 mm)对土壤水分亏缺的调控机制,优化苹果园水分管理。方法在距塬边3.5 m (L1)、7 m (L2)及11.5 m (L3)处布设土壤水分传感器,分别监测2023年苹果生长季距地表10、40、70 cm深度土层的体积含水量动态。基于实测数据率定与验证Hydrus-2D模型,通过情景模拟,控制暴雨总量不变,定量解析暴雨强度、间隔及过程对塬边土壤水分亏缺补充量的影响。结果生长季内,塬边(L1, L2)在40、70 ...
刘皓月, 吴松柏, 刘庭宇
doaj  

[Application of infrared thermography in breast reconstruction and plastic surgery and limb reconstruction]. [PDF]

open access: yesZhongguo Xiu Fu Chong Jian Wai Ke Za Zhi
Jian H   +26 more
europepmc   +1 more source

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