厚壁球壳的杂交／混合有限元分析

本文对８一节点四边形轴对称杂交／混合元ＡＸＨＭ１６进行了系列考核：（１）考查ＡＸＨＭ１６是否含有零能变形模式，以查明它的含秩状况；（２）通过受内压作用的厚壁球壳考题，观察ＡＸＨＭ１６的转轴不变性和其它性能表现。事实表明：ＡＸＨＭ１６满足单元合理足秩的必要条件和充分条件，不含零能变形模式，单刚合足秩。数值考核表明：ＡＸＨＭ１６具有很好的位移精度和应力精度，对坐标转轴的敏感程度并不明显，且在近乎相同的     

主动磁轴承的神经网络辨识研究

简述了主动磁轴承的工作原理及数学模型,在传统系统辨识的基础上提出了基于BP神经网络的非线性辨识方案.通过闭环控制使转子稳定悬浮,并在控制器的输出信号中加入随机噪声,以使系统被充分激励.按照10 kHz的采样频率对磁轴承的I/O数据进行采样,以用于磁轴承特性的辨识.对某单自由度磁轴承的仿真表明,神经网络模型能够以很高的精度逼近磁轴承的输入输出数据,且对不同的输入信号有较好的泛化能力,验证了所提方案的有效性.     

Robust Spectral Estimation of Track Irregularity

Because the existing spectral estimation methods for railway track irregularity analysis are very sensitive to outliers, a robust spectral estimation method is presented to process track irregularity signals. The proposed robust method is verified using 100 groups of clean/contaminated data reflecting he vertical profile irregularity taken from Bejing-Guangzhou railway with a sampling frequency of 33 data every 10 m, and compared with the Auto Regressive (AR) model. The experimental results show that the proposed robust estimation is resistible to noise and insensitive to outliers, and is superior to the AR model in terms of efficiency,, stability and reliability.     

Clinical Detection and Feature Analysis on Neuro Signals

Research on neuro signals is challenging and significative in modern natural science. By clinical experiment, signals from three main nerves (median nerve, radial nerve and ulnar nerve) are successfully detected and recorded without any infection. Further analysis on their features under different movements, their mechanics and correlations in dominating actions are also performed. The original discovery and first-hand materials make it possible for developing practical neuro-prosthesis.     

中国沿海推广风帆助航技术的节能效果分析

选取我国沿海具有代表性的6条航线，对各航线上的风频分布进行了较为全面的统计分析，并给出了风频分布直方图，针对6条典型航线，选用800吨风帆助航船作为计算船型，对我国沿海推广同帆助航技术的经济效益作了全面的计算分析，得出了一些有参考价值的数据和结论；根据计算结果，我国沿海推广风帆助航技术其帆节能可达9．08％－15．68％，其中天津一大连及温州－上海两条航线节能效果尤为明显，分别达15．68％和14．01％，这说明在中国沿海风帆船具有广泛的推广应用前景。     

A STUDY ON LIMITATION OF HIGH-ENERGY SHOCK WAVE-INDUCED RENAL DAMAGE BY SALVIA MILTIORRHIZAE INJECTION IN RABBIT MODEL

Extracorpealshockwavelithotripsy (ESWL)isanoninvasive ,almostpain freestandardtreatmentmodalityforurolithiasis.However ,ESWLisnotcompletelyfreeofsideeffect.Apartfromlocalhematomasanda potentialriskforhypertensionchanges,alterationsinkidneyfunctionhavebeenreported .SalviaMiltiorrhizaehasthe propertyofpromotingbloodcirculationandresolvingbloodsta sis.Thisstudywasinitiatedtoinvestigatethepo tentialprotectivefunctionofSalviaMiltiorrhizaeeagainsthigh energyshockwaveinducedrenaltoxi city .MATE…     

肇源松花江大桥软岩桩基试验研究

介绍了肇源松花江大桥软岩桩基采用自平衡法进行静载试验的情况。原设计根据本次试验结果进行了调整 ,达到桩基测试服务于设计的目的     

Experimental Investigation on Contribution of CFRP Attachment to Durability of Reinforced Concrete Structure Subjected to Chloride Attack

The function of externally-bonded carbon fiber reinforced polymer （CFRP） in preventing chloride from entering into concrete is verified by experiment. The results show that externally-bonded CFRP can be considered as a part of corrosion prevention system of strengthened concrete structures subjected to chloride ingress, and the contribution of CFRP should be considered in evaluation of durability of reinforced concrete structures with externally-bonded CFRP. With the effective shielding function of CFRP considered, an equation for residual lifetime prediction of concrete structures with externally-bonded CFRP is derived from Fick＇s dispersion law. CFRP has two functions for coastal concrete structures, including strengthening and increasing durability as part of corrosion prevention system.