摘要：This paper presents a design theory and dynamic mechanical characterizations of the composite tape-spring hinge made by two parallel single tape ***,the theoretical models of moment-rotation angle on anisotropy tape springs with antisymmetric laminates are ***,the relationships of moment-rotation angle for tape-spring hinges with different sizes are simulated and analyzed by means of the finite element method (FEM),which is in good agreement with the results from theoretical ***,the dynamic vibration analysis for deployable composite tube hinges with different dampings is done during the process of deployment.

摘要：High spatiotemporal resolution brain electrical signals are critical for basic neuroscience research and high-precision focus diagnostic localization,as the spatial scale of some pathologic signals is at the submillimeter or micrometer *** entails connecting hundreds or thousands of electrode wires on a limited *** study reported a class of flexible,ultrathin,highdensity electrocorticogram(ECoG)electrode *** challenge of a large number of wiring arrangements was overcome by a laminated structure design and processing technology *** flexible,ultrathin,high-density ECoG electrode array was conformably attached to the cortex for reliable,high spatial resolution electrophysiologic *** minimum spacing between electrodes was 15μm,comparable to the diameter of a single *** hundred electrodes were prepared with an electrode density of 4444 mm^(-2).In focal epilepsy surgery,the flexible,high-density,laminated ECoG electrode array with 36 electrodes was applied to collect epileptic spike waves inrabbits,improving the positioning accuracy of epilepsy lesions from the centimeter to the submillimeter *** flexible,high-density,laminated ECoG electrode array has potential clinical applications in intractable epilepsy and other neurologic diseases requiring high-precision electroencephalogram acquisition.

摘要：监测轮轨力信号对于保障高速列车的安全运行、提高轨道线路的质量管理具有重要意义.然而,现有的轮轨力测试方法不能保证车轮在任意旋转角度下的测试精度与灵敏度,难以实现列车在高速行驶过程中轮轨力的实时连续测量.本文基于柔性电子技术设计了一款新型轮轨力传感器,在柔性衬底上设计环形应变栅结构,利用金属的压阻效应,获取环形区域内的整体变形随轮轨力变化的情况.垂向加载实验结果表明,柔性轮轨力传感器不仅具有良好的线性度,且在循环加载测试中表现出优异的稳定性和可重复性.更重要的是,该柔性轮轨力传感器能保证车轮在旋转任意角度情况下的测试精度与灵敏度.有限元仿真结果表明,在车轮内外两侧相对轴心等距离处布置柔性环形传感器,通过两侧传感器的输出信号可实现对轮轨横向力和垂向力的有效解耦.配合无线传感技术,柔性轮轨力传感器可实现高速列车轮轨力实时连续监测,对我国发展下一代智能高铁具有重要意义.

摘要：Signal drift and performance instability of brain-computer interface devices induced by the interface failure between rigid metal electrodes and soft human skin hinder the precise data acquisition of electroencephalogram(EEG).Thus,it is desirable to achieve a robust interface for brain-computer interface ***,a kind of polydopamine methacrylamide-polyacrylamide(PDma-PAAM)hydrogel is *** improve the adhesion,dopamine is introduced into the polyacrylamide hydrogel,through the amino and catechol groups of dopamine in an organic-inorganic interface to build a covalent and non-covalent interaction.A strong attachment and an effective modulus transition system can be formed between the metal electrodes and human skin,so that the peeling force between the PDmaPAAM hydrogel and the porcine skin can reach 22 N m^(-1).In addition,the stable conductivity and long-term operating life of the PDma-PAAM hydrogel for more than 60 days at room temperature are achieved by adding sodium chloride(NaCl)and glycerol,*** PDma-PAAM hydrogel membrane fabricated in this work is integrated onto a flexible Au electrode applied in a brain-computer *** comparison,the collected EEG signal intensity and waveform are consistent with that of the commercial *** obviously,the flexible electrode with PDma-PAAM hydrogel membrane is demonstrated to enable a more stable and userfriendly interface.

摘要：共生是重要的生态学现象,在植物界普遍存在,但在以海草为代表的海洋植物中相关研究较少。在观察到海南岛海草床中泰来草(Thalassia hemprichii)与圆叶丝粉草(Cymodocea rotundata)高度重叠分布的现象后,本研究通过设计模拟实验,将2种海草进行单独种植与混合种植,从而评价共同生长对泰来草和圆叶丝粉草生理与生长状况的影响规律,探究2种海草的共生机制。研究结果表明:地上部分,泰来草与圆叶丝粉草共同生长的环境能提高圆叶丝粉草的初级生产力,表现为提高圆叶丝粉草的叶片生长速率与平均叶面积;能有效促进圆叶丝粉草叶片的氮、磷元素积累;与泰来草共生能增强圆叶丝粉草的光合作用与抗逆性,表现为叶绿素a、叶绿素b与类胡萝卜素3类光合色素含量与淀粉、可溶性糖以及可溶性蛋白3类对细胞渗透有重要作用的光合产物含量均显著(P<0.05)或极显著增加(P<0.01)。而在地下部分,圆叶丝粉草的根系活力也在共生环境中有显著提高。但共生环境对泰来草的生理与生长特性的影响不显著。因此,与泰来草共同生长能增强圆叶丝粉草的生理与生长活性,属于对圆叶丝粉草有利的偏利共生。