Results 221 to 230 of about 32,954 (259)

[Research progress of suture augmentation in anterior cruciate ligament reconstruction]. [PDF]

Zhongguo Xiu Fu Chong Jian Wai Ke Za Zhi
Liu J, Li H, Wang M, Wang Y, Guo G, Zhang H.   +5 more
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[Applications of ordered porous materials in chromatography separation and analysis]. [PDF]

Se Pu
Wang ZX, Wang DD, Wang ST, Song YY.
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[Develop and assessment of a predictive model for the first-course efficacy of acute myeloid leukemia]. [PDF]

Zhonghua Xue Ye Xue Za Zhi
Zhu F, Zhou YL, Zhang Y, Mao LP, Zhou D, Ma LY, Yang CM, Yu WJ, Ye XN, Wei JY, Meng HT, Yang M, Mai WY, Qian JJ, Ren YL, Lou YJ, Huang J, Xu GX, Xie WZ, Tong HY, Wang HF, Jin J.   +21 more
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[The value of sequential organ failure assessment and its dynamic changes in predicting mortality in hematology intensive care unit]. [PDF]

Zhonghua Xue Ye Xue Za Zhi
Wang JJ, Zhang J, Zhang B, Cao YC, Guo YL, Yu PR, Zhang XQ, Zhang XJ, Song YJ.   +8 more
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Effect of symmetrical bone repair of nasal alar base on nasal deformity after unilateral cleft lip surgery. [PDF]

Hua Xi Kou Qiang Yi Xue Za Zhi
Jian J, Jing B, Yang C, Shi B, Li C.
europepmc   +1 more source

[Efficacy of 1% povidone-iodine mouthwash combined with scaling and root planing in the treatment of periodontitis: a randomized, controlled trial]. [PDF]

Hua Xi Kou Qiang Yi Xue Za Zhi
Liu E, Duan D, Xie X, Li H, Li M, Ding Y.   +5 more
europepmc   +1 more source

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基于T-S模糊模型的多时滞非线性网络切换控制系统非脆弱 H ∞ 控制

, 2021
针对一类控制器增益存在摄动的不确定非线性网络切换系统, 在系统同时存在随机时变时滞和数据包丢失的情况下, 研究系统的非脆弱H∞控制问题.首先, 利用T-S模型, 将非线性网络切换系统建模为网络切换模糊系统; 其次, 将数据包丢失作为时滞处理, 并采用Bernoulli分布的随机序列描述该时滞; 再次, 采用平均驻留时间的方法(ADT)设计系统的切换律及非脆弱状态反馈控制器, 并给出网络切换模糊时滞系统指数稳定的平均驻留时间条件; 最后, 结合李雅普诺夫(LKF)方法给出系统均方指数稳定且满足H ...
刘毅, Liu Yi, 梅玉鹏, Mei Yu-peng, 李国燕, LI Guo-yan, 潘玉恒, Pan Yu-heng, 梅树立, Mei Shu-li   +9 more
semanticscholar   +1 more source

沪苏通大桥风-车-桥耦合系统非线性动力响应研究

, 2021
几何非线性是大跨度桥梁结构的主要非线性影响因素之一，对桥梁结构及桥上列车行车安全性的影响不容忽视。该文以世界首座跨度超1 km的公铁两用斜拉桥——沪苏通长江大桥为工程背景，基于桥址区复杂风场实测，采用谱表示法提取实际风场特征，模拟全桥三维风速场，建立了考虑复杂非线性空间特性的风荷载模型，考虑垂度效应、梁柱效应和大位移效应等几何非线性因素，建立了桥梁非线性计算子模型，采用全过程迭代法计算考虑非线性因素的风-车-桥耦合振动响应，并给出行车安全性分析。结果表明：考虑非线性因素工况下 ...
徐曼, 曾滨, 乔宏, 许庆, 郭薇薇, 夏禾   +5 more
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基于改进 k -means算法的可见光通信非线性补偿技术

, 2021
可见光通信系统中，正交频分复用技术的高峰均功率比会加大发射信号产生非线性失真的概率。为了降低系统的误码率，提出了一种改进的k均值（k-means）算法的非线性补偿技术。该算法考虑了信号的传输特性，运用Dijkstra算法优化了k-means算法中初始点的选择，能够准确地找到接收信号星座图的聚类中心，避免了传统k-means算法在选择初始聚类点时陷入局部最优解。仿真结果表明，相比于传统的k-means算法，改进的k-means算法能更准确地找到非线性失真后信号的星座点位置 ...
张慧, Zhang Hui, 黄绪发, Huang Xufa, 郭心悦, Guo Xinyue, 王镜阳, Wang Jingyang, 姚茂新, Yao Maoxin, 马仁伟, MA Renwei   +11 more
semanticscholar   +1 more source