Results 81 to 90 of about 6,797 (151)

基于ESO的磁悬浮转子系统基础激励抑振研究

Zhendong Ceshi yu Zhenduan
磁悬浮转子在基础激励作用下振动会进一步加剧，严重时会发生碰摩而使系统失稳。针对此问题，通过引入扩张状态观测器（extended state observer，简称ESO）来实现基础激励的振动控制，其鲁棒性强且不依赖精确建模，可以实时观测扰动。首先，搭建基础激励下磁悬浮转子机电一体化模型，利用该模型仿真分析了基础激励参数与比例⁃积分⁃微分（proportional integral derivative，简称PID）控制参数变化对系统动力学响应的影响规律，得知PID难以满足基础激励抑振需求；其次 ...
doaj   +1 more source

波纹钢夹角对复合结构损毁效应的影响研究

Zhendong Ceshi yu Zhenduan
针对平钢板‑混凝土复合结构或单一波纹钢结构在抗爆性能方面具有一定局限性的问题，根据波纹钢能够提高混凝土板抗爆性能的技术，提出了改变波纹钢夹角的加固方法。首先，将有限元法与光滑粒子法（finite element method‑smoothed particle hydrodynamics， 简称FEM‑SPH）耦合，建立接触爆炸荷载下波纹钢‑混凝土板复合结构三维精细化数值仿真模型；其次，对波纹钢‑混凝土板复合结构破坏模式的试验结果和模拟结果进行对比；最后，研究波纹钢夹角变化下复合结构的毁伤特征。结果表明：
doaj   +1 more source

[Single-cell RNA sequencing of B cells reveals molecular typing in Sjögren syndrome]. [PDF]

Beijing Da Xue Xue Bao Yi Xue Ban
Lin W, Xie Y, Wang F, Wang S, Liu X, Hu F, Jia Y.   +6 more
europepmc   +1 more source

[Clinical application and mechanistic studies of psychedelics for treatment of depression: progress and future challenges]. [PDF]

Nan Fang Yi Ke Da Xue Xue Bao
Xia K, Gao T.
europepmc   +1 more source

[Molecular imprinting strategies and advances targeting biomembranes]. [PDF]

Se Pu
Yuan XT, Wang L, Chen LX, Hu LH.
europepmc   +1 more source

运动调控程序性细胞死亡在肌少症防治中的研究进展

Zhongshan Daxue xuebao. Yixue kexue ban
随着全球人口老龄化进程的加快，肌少症作为一种以骨骼肌质量、力量与躯体功能持续性下降为特征的老年综合征，已成为严重威胁老年人健康和生活质量的重要公共卫生问题。其发生发展过程涉及多层次、跨系统的细胞与分子机制。近年来研究发现，程序性细胞死亡（PCD）在骨骼肌稳态维持、代谢调节与组织修复中发挥核心作用。凋亡、自噬、焦亡与铁死亡等典型PCD形式通过活性氧（ROS）积聚、线粒体功能障碍与铁稳态破坏等关键节点相互串扰，驱动肌纤维丢失、肌肉功能减退及慢性炎症反应，是肌少症发生发展的重要病理基础 ...
史雪珂, 冯晓东
doaj  

[Advances in application of cell imprinting technology in biomedical field]. [PDF]

Se Pu
Zhao XM, Zhang ZY, Sun WJ, Qing GY.
europepmc   +1 more source

[Research progress of molecular imprinting technology in the field of disease diagnosis and therapy]. [PDF]

Se Pu
Zhu R, Cai GP, Zheng HJ, Jia Q.
europepmc   +1 more source

[Application and research progress of metal-organic framework materials in skin repair]. [PDF]

Sheng Wu Yi Xue Gong Cheng Xue Za Zhi
Ma S, Wu W, Liu H, Liu M, Xing F.
europepmc   +1 more source

["Chongqing experiences" in treatment of bone infections]. [PDF]

Zhongguo Xiu Fu Chong Jian Wai Ke Za Zhi
Xie Z.
europepmc   +1 more source