, 2014 为解决基于连续介质力学的离散元方法（CDEM）在高速冲击模拟中因网格畸变导致的系统能量发散问题,提出了一种基于颗粒接触的二维无网格方法（PCMM）。该方法基于颗粒间复杂丰富的接触信息构建三角形单元,通过接触对的演化更新实现旧单元（满足删除条件的单元）的删除及新单元（满足创建条件的单元）的重建,通过在单元内引入流体弹塑性模型实现高速冲击问题的模拟。给出了三角形单元创建的3个必备条件：组成单元的3个颗粒必须彼此接触,任意一个内角必须在30°~150°之间,任意一条边长必须大于平均半径的0.5倍。弹性杆撞击 ...
冯春, 刘晓宇, 李世海
core
密柱网格式钢框柱计算长度系数研究 Research on the Effective Length of Columns in Dense-Column Steel Grid Frame
, 2016 翟福胜 +3 more
semanticscholar +1 more source
Shuitu Baochi Xuebao目的菌根作为连接植物与土壤的桥梁，在土壤碳（C）库收支平衡中扮演着关键角色。菌根通过吸收土壤中的矿物营养物质以交换植物光合作用固定的C，同时也通过呼吸作用造成土壤C损失。尽管人们对菌根在土壤碳输入、分解和固持方面的作用已有较深入了解，但关于菌根对土壤呼吸的影响仍相对有限。方法采用网络排除法和比较法综述菌根对土壤呼吸的影响及其调控因子。结果通过网格排除法，有学者成功分离并量化菌根呼吸，发现其平均占土壤呼吸的16.8%。具体而言，丛枝菌根呼吸和外生菌根呼吸对土壤呼吸的贡献分别为18.4%（2.5%~32.0%
郑翔 +7 more
doaj
[Application of pectoralis major fascia in robotic nipple-sparing mastectomy with immediate breast reconstruction with gel implant]. [PDF]
Zhonghua Shao Shang Yu Chuang Mian Xiu Fu Za ZhiChen K, Lyu PW.
europepmc +1 more source
[<i>Jiangzhi Quban</i> Recipe improves type 2 diabetes mellitus complicated with hyperlipidemia by multi-target regulation of the inflammation-metabolism network: network pharmacology analysis and clinical validation]. [PDF]
Nan Fang Yi Ke Da Xue Xue BaoLi Z +6 more
europepmc +1 more source
[Application of an interpretable neural network framework based on the LASSO-proj algorithm for warfarin dose prediction]. [PDF]
Sheng Wu Yi Xue Gong Cheng Xue Za ZhiZhong C, Zhu Y, Gu X.
europepmc +1 more source
[Shape-aware cross-modal domain adaptive segmentation model]. [PDF]
Sheng Wu Yi Xue Gong Cheng Xue Za ZhiLiu Y +5 more
europepmc +1 more source
[An unsupervised three-dimensional medical image registration method based on shifted window Transformer and convolutional neural network]. [PDF]
Sheng Wu Yi Xue Gong Cheng Xue Za ZhiLi Y, Ruan C, Ruan D.
europepmc +1 more source