Results 131 to 140 of about 1,133,635 (178)

[Deep learning-based dose prediction in radiotherapy planning for head and neck cancer]. [PDF]

Nan Fang Yi Ke Da Xue Xue Bao, 2023
Teng L, Wang B, Feng Q.
europepmc   +1 more source

[Pathogen Profile and Risk Factors for Hospital-Acquired Infection in Stroke Patients]. [PDF]

Sichuan Da Xue Xue Bao Yi Xue Ban
Xu T, Han B, Zhang H, Shao C, Wang Y, Jiao Y, Zhang G.   +6 more
europepmc   +1 more source

[Distribution of memory B cell subsets in peripheral blood of children with frequently relapsing nephrotic syndrome]. [PDF]

Zhongguo Dang Dai Er Ke Za Zhi, 2023
Yuan WJ, Cheng J, Liu CM, Liu JH, Shi MY, Lu SW, Guan FJ.   +6 more
europepmc   +1 more source

膜下滴灌风沙土盐分变化及分布特点

, 2005
通过对已进行膜下滴灌2a和5a的改良风沙土电导率和总盐分的测定,探讨不同滴灌年限土壤盐分变化及分布特点。研究表明,在膜下滴灌与冬灌和春灌相结合的条件下,土壤表层0～30cm盐分逐年下降,但脱盐效率也不断降低;盐分在土壤中分层明显,在水平方向,距离滴头越远,盐分越重;垂直方向,土壤盐分最低值位于表层20～40cm处。在表层0～40cm的土层中,靠近薄膜边缘盐分差异较大;随着滴灌年限的增加,脱盐区范围增大,特别是水平脱盐距离增加明显。不同滴灌年限的深层压盐区变化不大,膜间聚盐区位于膜间裸地并延伸到薄膜内 ...
刘新永,田长彦,吕昭智
core  

[Analysis of the prevalence and influencing factors of myopia among primary and secondary school students in Inner Mongolia Autonomous Region in 2022]. [PDF]

Beijing Da Xue Xue Bao Yi Xue Ban
Lu L, Li J, Huang T, Yang R, Liu Y, Dang J, Cai S, Sun Z, Liu M, Yang Y, Zhu K, Song Y.   +11 more
europepmc   +1 more source

[Design of a dynamic measurement system for Bl factor spatial distribution of resonant blood viscoelastic sensor]. [PDF]

Sheng Wu Yi Xue Gong Cheng Xue Za Zhi, 2023
Qian J, Sun H, Wang B.
europepmc   +1 more source

黄土高原沟壑区小流域坡地土壤养分分布特征

, 2007
坡地土壤质量退化以及生产力下降是限制坡地植被恢复的主要因素,而坡地土壤质量和生产力在很大程度上取决于土壤养分状况。通过野外调查和室内分析相结合的方法,研究了黄土高原沟壑区坡地土壤养分分布特征,结果表明坡地土壤主要养分含量均随土壤层次的加深而降低,其中以有机碳和全氮降低最多,而硝、铵态氮和全磷降低较少;坡地不同土层土壤有机碳和全氮表现出较大的变异性,土壤铵态氮和全磷的变异较小。0.005~0.05mm土壤颗粒含量随土层加深而增加,0.05~1mm颗粒含量随土层加深而降低;<0 ...
魏孝荣, 邵明安
core  

[Distribution characteristics of traditional Chinese medicine syndromes in patients with hepatolenticular degeneration across all age groups]. [PDF]

Zhejiang Da Xue Xue Bao Yi Xue Ban
Hua D, Sun L, Xuan Q, Xiang S, Shi S, Yang W, Wang H.   +6 more
europepmc   +1 more source

[Regional distribution differences and influencing factors of primary healthcare institutions in China]. [PDF]

Zhong Nan Da Xue Xue Bao Yi Xue Ban
Ni P, Wang J, Shi L, Xu L.
europepmc   +1 more source

[Exposure Pathways of Polystyrene Nanoplastics Mediate Their Cellular Distribution and Toxicity]. [PDF]

Sichuan Da Xue Xue Bao Yi Xue Ban
Li J, Bao Q, Li Z, Yao Y, Wu D, Peng L, Liu Z, Li L, Zhang L.   +8 more
europepmc   +1 more source