基于小型无人直升机的三维建模成像系统设计

对于大角度、大范围、复杂场景的快速扫描成像系统,除了要进行任意运动和动态采集建模外,还要对激光传感器的姿态和位置进行实时精确的描述.基于此要求,文中构建了一种基于小型无人直升机机载激光扫描传感器的三维建模成像系统,并设计了一种分步式串级滤波算法,将激光测距传感器得到的距离信息,与小型无人直升机惯性导航系统解算的姿态与位置数据进行融合,实现空间扫描点到基准坐标系的映射,并完成2D行扫描到3D空间的扩展,建立现实世界的3D数字模型.     

基于磁光传感器的焊缝检测装置的研制

针于激光焊接所要求的紧密焊缝,构建以磁光传感器为核心的焊缝检测装置,该装置能检测出反映焊缝特征的磁光图像.通过分析磁光图像的特点,确定磁光图像中过渡带的中心为焊缝中心.最后,通过中值滤波,获得比较清晰的磁光图像,并把该图像进行灰度化处理,获得沿焊缝两侧的灰度变化图,通过分析灰度变化图,能获得焊缝的测量中心,这为利用磁光图像进行微焊缝跟踪的激光焊接确定了可能性.     

新型双路光纤高速着色复绕机及其工艺技术研究

详细介绍了新型双路光纤高速着色复绕机的基本机构和主要技术指标,并探讨了光纤着色固化工艺技术。     

Combining fiber dissection,plastination, and tractography for neuroanatomical education: Revealing the cerebellar nuclei and their white matter connections

In recent years, there has been a growing interest in white matter anatomy of the human brain. With advances in brain imaging techniques, the significance of white matter integrity for brain function has been demonstrated in various neurological and psychiatric disorders. As the demand for interpretation of clinical and imaging data on white matter increases, the needs for white matter anatomy education are changing. Because cross‐sectional images and formalin‐fixed brain specimens are often insufficient in visualizing the complexity of three‐dimensional (3D) white matter anatomy, obtaining a comprehensible conception of fiber tract morphology can be difficult. Fiber dissection is a technique that allows isolation of whole fiber pathways, revealing 3D structural and functional relationships of white matter in the human brain. In this study, we describe the use of fiber dissection in combination with plastination to obtain durable and easy to use 3D white matter specimens that do not require special care or conditions. The specimens can be used as a tool in teaching white matter anatomy and structural connectivity. We included four human brains and show a series of white matter specimens of both cerebrum and cerebellum focusing on the cerebellar nuclei and associated white matter tracts, as these are especially difficult to visualize in two‐dimensional specimens and demonstrate preservation of detailed human anatomy. Finally, we describe how the integration of white matter specimens with radiological information of new brain imaging techniques such as diffusion tensor imaging tractography can be used in teaching modern neuroanatomy with emphasis on structural connectivity. Anat Sci Educ. 7: 47–55. © 2013 American Association of Anatomists.     

现代排球运动系统整体功能态生理学分析

排球运动是一项对抗性强、争夺激烈的间歇式集体运动项目.结合排球运动的特点,运用文献资料法,从肌肉系统、氧运输系统、能量供应系统、神经系统以及运动负荷等方面对现代排球运动进行生理学研究探讨,为运动选材和训练提供理论依据.     

辅助教学平台在“光纤通信”课程中的应用

针对"光纤通信"课程讲授中"学生难学,教师难讲"的弊端,建立了基于光纤相关特性的辅助教学仿真平台。仿真平台的设计利用MATLAB的可视化用户界面,完成了对光纤通信性能参数的测量、光纤相关特性展示、光纤通信器件展示。结果表明结合仿真软件的教学手段有助于学生理解和掌握课程内容。     

A re-united pair: The conservation,technical study,and ethical decisions involved in exhibiting two terracotta orante statues from Canosa

The collection of the Worcester Art Museum includes two rare Magna Graecia terracotta funerary statues from Canosa, Italy dating to the third century BCE. Each depicts a female figure in prayer or lament known as an orante. The orantes were purchased by the museum in 1927, but shortly thereafter were separated. One was left in storage for nearly seven decades and the other was sold, and ultimately entered a private collection halfway around the world. The orantes were recently reunited under serendipitous circumstances and, after more than 80 years, will finally be placed on display at the Museum. As part of a comprehensive treatment, a technical study was carried out to identify the materials and methods used in their manufacture and in previous restoration campaigns. Materials were characterized by cross-section analysis, spot tests, Fourier transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM), neutron activation analysis (NAA), thermogravimetric analysis (TGA), thermoluminescence (TL) dating, and reflectance transformation imaging (RTI). The analytical findings helped inform the conservation treatments, which included structural work, surface cleaning using a Nd:YAG laser, and esthetic reintegration.     

骨胳肌在乳酸生成和清除中的作用

关于骨胳肌与乳酸代谢的研究已取得了很多重要进展。论述了不同强度运动时骨胳肌乳酸的生成及不同肌纤维清除乳酸的途径。以往认为骨胳肌无糖异生作用，但现在研究认为骨胳肌肌纤维具有糖异生作用。     

以炭素纤维杆子为补强材的钢筋混凝土褓的研究

新开发的炭素纤维与以往的CFS在材料力学上性质相等,施工性和母材的附着功能强,补强效果提高.本文通过使用这一新材料进行钢筋混凝土褓的破坏实验,试图证明其在耐力和柔韧性等方面的改善作用.     

国产新型FA762A-10短纤倍捻机的特点及生产实践

介绍了国产 FA76 2 A - 10新型短纤倍捻机的技术特点 ,通过生产实践证明了该机在提高股线质量方面的良好性能 ,为企业在短纤倍捻机的选择方面提供了实践依据