患"颤抖病"中华绒螯蟹血细胞中类立克次体寄生的超微结构观察

本文对患“颤抖病”的中华绒螯蟹血细胞内类立克次体生物RLOs的寄生及繁殖特性进行了超微结构研究。正常中华绒螯蟹的血细胞可分为三类；无颗粒细胞、小颗粒细胞、小颗粒细胞和大颗粒细胞，而RLOs只特异性地侵染小颗粒细胞。RLOs以胞吞的方式进入小颗粒细胞，并在细胞内大量增殖形成包涵体，使细胞肿胀、瓦解、坏死，进而释放出RLOs，释放出的RLOs又继续侵染其他靶组织和细胞。     

微动勘探技术在城市轨道交通勘察中的应用

微动勘探作为基于天然源的面波勘探方法,具有方便快捷、低成本、不破坏环境等优点,在城市轨道交通工程勘察中的应用越来越广泛。以武汉某轨道交通前期勘探工作为例,开展了微动勘探试验研究,采用SFLEX高保真度无线三维地震勘探数据采集系统,通过布置圆形台阵采集微动数据,借助SPAC法提取微动数据的频散特性从而反演地下介质视S波速度剖面。试验结果表明,微动探测适合于城市复杂场地环境和地磁环境的地质体探测,数据采集方便快捷,速度分层准确可靠。     

消除弹道跟踪数据中伺服系统的振颤干扰?

通过研究伺服系统对跟踪设备的影响,分析了跟踪设备在振颤状态下工作所受的干扰。以测试结果绘图,识别出跟踪线的俯仰角速度和方位角速度,能分辨出稳定的目标信号以及周期性的干扰信号。消除振颤干扰的方法,就是剔除受干扰的目标线的角速度值,以稳定的目标角速度替代,以测距结果配合无干扰的俯仰角与方位角,解算无干扰的弹道跟踪结果。     

常时微动测试在工程场地评价中的应用与发展

结合作者主持的上海中心大厦、2010年上海世博会中国国家馆等典型工程，在对常时微动测试发展历史及现状进行综合述评的基础上，详细介绍了常时微动测试的基本原理、现场测试、信号分析等内容，论述了常时微动测试技术在工程场地评价中的应用与发展，可以为相关的工程技术人员提供参考。     

冲击地压、岩爆、矿震的关系及其数值模拟研究

全面论述了冲击地压、岩爆与矿震现象，对其进行了具体定义，指出三者之间的关系。采用数值计算手段对冲击地压与岩爆现象进行对比分析，指出它们的异同。在此基础上，建议对“冲击地压一、“岩爆”和“矿震”这3个术语区别使用。     

冒落型矿震能量确定探讨

冒落型矿震是一种普遍发生的采空区灾害,正确确定冒落矿震的能量是准确预报矿震强度的前提。为此从上部岩体冒落做功分析着手分析了位势能的转换,分别探讨了影响振动能、破碎能、冲击变形能大小的因素;提出了基于实验室测定位势能转化为振动能转化系数的矿震能量的定量确定思路;并对矿震能量耦合进行了简单探讨。     

A time-sequence-based fuzzy support vector machine adaptive filter for tremor cancelling for microsurgery

Hand tremors may cause some blemishes in precision and stability of a minimally invasive surgery (MIS). To track the tremor signals accurately, there are two main problems left to be settled. First, it is not practical to collect the sample data of tremor in large scale in practical applications. To deal with the hand tremors, a learning method based on small samples sizes and high dimensional input space is needed. Second, the hand tremors have time-varying characteristics. This fact is neglected by traditional learning methods, which could lead to imprecision and instability of a MIS. In this work, a time-sequence-based fuzzy support vector machine adaptive filter (TSF-SVMAF) for tremor cancelling is proposed. The proposed method is based on support vector machine and time series. It is suitable for solving the problem that the inputs are time-varying and the samples are small-scale. To cancel the time-varying hand tremors, different learning-weight-functions are designed for tremor signals with different frequencies. From the simulation results, compared with the existing methods such as back propagation (BP), weighted-frequency Fourier combiner (WFLC) and bandlimited multiple Fourier linear combiner (BMFLC), the proposed method has better performance when learning the time-varying hand tremors with small sample sizes.     

功能性电刺激抑制震颤中的模糊自适应PID控制研究

基于功能性电刺激技术(FES)对腕关节震颤的辅助式抑震技术进行了研究。在前人的基础上开展了针对腕关节单自由度运动性震颤抑制的仿真研究,针对抑制震颤的同时对自主运动不产生影响这个目标给出了运动性震颤抑震系统的控制策略,以传统PID或者模糊自适应PID为控制器并在反馈回路中加入无限冲击响应(IIR)高通滤波器。在Simulink中建立了抑震控制系统,采集了震颤患者5种常见动作作为仿真系统输入进行了震颤抑制仿真,传统PID震颤抑制率最高87.05%,模糊自适应PID最高抑震率为91.5%。     

Cognitive profile of fragile X premutation carriers with and without fragile X-associated tremor/ataxia syndrome.

Fragile X-associated tremor/ataxia syndrome (FXTAS) develops in a subset of fragile X premutation carriers and involves gait ataxia, action tremor, Parkinsonism, peripheral neuropathy, autonomic disorders, and cognitive impairment. The study was designed to define the nature of cognitive deficits affecting male premutation carriers with and without FXTAS. A sample of 109 men underwent motor, cognitive, genetic, and neurologic testing, as well as brain magnetic resonance imaging. Subjects were classified into 3 groups: (a) asymptomatic premutation carriers, (b) premutation carriers with FXTAS, and (c) normal controls. Men with FXTAS performed worse than controls on mental status, intelligence, executive cognitive functioning (ECF), working memory, remote recall of information, declarative learning and memory, information processing speed, and temporal sequencing, as well as 1 measure of visuospatial functioning. Language and verbal comprehension were spared. Asymptomatic carriers performed worse than controls on ECF and declarative learning and memory. This comprehensive examination of cognitive impairment in male premutation carriers suggests that FXTAS involves substantial executive impairment and diffuse deficits in other cognitive functions. Longitudinal research currently underway will provide insight into the progression of the disorder. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

地脉动方法在砌体文物结构检测中的应用

砌体文物结构经过成百上千年风化和破坏,易出现强度降低、结构损坏,需进行相应的损伤现状检测,并采取保护措施。目前已有的目视、回弹、沉降监测等方法关注的是表观、局部现状,缺乏整体的判断。文中提出了利用地脉动方法中,卓越频率与监测点结构刚度具有良好对应关系的特点,将其应用到砌体文物检测中。文中详细介绍了该方法的原理,并以上海项宅检测结果为例,介绍了检测流程、布点方案,并分析得到了结构的刚度分布现状和残余刚度分布现状,经验证,分析结果与结构的损伤情况具有很好地对应性。