Results 71 to 80 of about 555,779 (114)

爆破震动等效载荷模型

, 2003
通过对实验数据、点源矩理论和等效孔穴理论的分析对比认为：在爆破区的邻近范围以外的震动信号主要来源于由于爆破作用引起的爆破后的爆破区邻近范围内地质结构的自振，震动信号是由结构进行滤波后传出的。而不是像很多人认为的那样：这种滤波作用主要是由介质的非弹性性质（如介质阻尼等）决定的。由此给出了一种适用于松动爆破的爆破震源的等效模型，说明并验证了在一定条件下载荷的时间函数的冲量的决定作用。同时实现了利用有限元方法对爆破震动过程进行数值模拟 ...
郑哲敏, 丁桦
core  

[Drug repositioning prediction based on dynamic feature learning on heterogeneous graphs]. [PDF]

Nan Fang Yi Ke Da Xue Xue Bao
Zhu H, Guo Y, Xin X, Li C, Zhou D.
europepmc   +1 more source

我國營業稅外銷零稅率制度之研究

, 1994
　　加值稅(Value Added Tax) 自一九五四年法國開始採行以來迄今世界已逾五十個國家實施加值稅，已成為各國賦稅改制的一種趨勢。我國自民國七十五年四月一日開始實施營業加值稅。為降低本國產品之成本，進而增強其國際市場之競爭能力，採行加值稅的國家，對外銷及類似外銷適用零稅率。自民國七十六年至民國八十二年，零稅率銷售額佔營業稅總銷售額比率，均達18%以上，歷年應退稅額和應實繳稅額之比率，均逾25%，可知外銷零稅率制度在營業稅中地位之重要。　　跨國交易課徵租稅的原則有目的地原則和宗主國原則之分 ...
楊秋美
core  

[Effectiveness and cost-effectiveness of risk-based topical fluoride intervention on early childhood caries in Jiangnan District, Nanning City]. [PDF]

Hua Xi Kou Qiang Yi Xue Za Zhi
Jiang Y, Li Y, Zhang Y, Liu F, Li L, Deng S, Qin Y, Yu J, Qiu R.   +8 more
europepmc   +1 more source

[Comparison of effectiveness between endoscopic and microscopic anterior cervical discectomy and fusion]. [PDF]

Zhongguo Xiu Fu Chong Jian Wai Ke Za Zhi
Huang C, Chen K, Liu H, Ge Z, Lin D, Chen B, Su G, Lin Y, Hou Y, Li Y.   +9 more
europepmc   +1 more source

[Performance of a prompt engineering method for extracting individual risk factors of precocious puberty from electronic medical records]. [PDF]

Zhong Nan Da Xue Xue Bao Yi Xue Ban
Zhou F, Zhong T, Yang G, Ding X, Yan Y.
europepmc   +1 more source

[<i>Qingshen</i> Granules inhibits renal fibrosis in mice by regulating glycolytic reprogramming and H3K18 lactylation]. [PDF]

Nan Fang Yi Ke Da Xue Xue Bao
Chen Y, Wang W, Cheng M, Zhang W, Gao Y, Hong X, Zhang L, Dai R, Wang Y.   +8 more
europepmc   +1 more source

[Evolving treatment landscape of pediatric acute leukemia: integration and breakthroughs in immunotherapy and targeted therapy]. [PDF]

Zhongguo Dang Dai Er Ke Za Zhi
Wen FQ, Mai HR.
europepmc   +1 more source

[Brain midline segmentation method based on prior knowledge and path optimization]. [PDF]

Sheng Wu Yi Xue Gong Cheng Xue Za Zhi
Geng S, Li Y, Ao Y, Shi W, Miao Y, Wang S, Jiang Z.   +6 more
europepmc   +1 more source

[Retrospective study of fertility in female patients with hematological diseases after allogeneic hematopoietic stem cell transplantation]. [PDF]

Zhonghua Xue Ye Xue Za Zhi
Huang JY, Huang WSX, Jiang BX, Ding FWX, Chen SN, Cai WZ.   +5 more
europepmc   +1 more source