基于ELM的硫熏强度软测量模型

硫熏强度是亚法糖厂澄清工段的关键工艺参数之一;硫熏强度过低会影响澄清效果,过高会造成成品糖二氧化硫残留过高;目前由于缺乏合适的硫熏强度在线测量装置,该参数主要采用人工取样和离线化验的检测方式,化验滞后时间较长,难以根据该指标及时指导实际生产的问题;为此文章采用极限学习机(ELLM)方法建立了硫熏强度软测量模型,并与基于支持向量机(SVM)、径向基函数(RBF)神经网络和反向传播(BP)神经网络的硫熏强度软测量模型进行对比分析;结果显示,基于ELM的硫熏强度软测量模型具有训练收敛速度快、模型精度高和泛化性能好等优点,可以满足实际糖厂澄清工段的要求.     

Development of a robot assisted carotid blood flow measurement system

The ultrasound diagnosis of the carotid artery is one of the most common non-invasive methods to detect early stage heart and cerebrovascular diseases. However, the precision and repetitiveness of the probe positioning depend exclusively on the operator's skills and dexterity. For this purpose, we propose the development of a robot assisted system to enhance the accuracy and repetitiveness of the probe positioning to measure the wave intensity (WI) index. In this paper, the Waseda-Tokyo Women's Medical-Aloka Blood Flow Measurement Robot System No. 2 Refined (WTA-2R) is presented. The WTA-2R consists of a conventional ultrasound diagnosis system, a 6-DOFs parallel link slave manipulator, a 6-DOFs serial link passive arm, and a master device. Experiments were carried out to verify its effectiveness in terms of accuracy and required time to perform the task. From the experimental results, the positioning accuracy and reduction of required time were confirmed.     

Cellular analysis by open-source software for affordable cytometry

Image cytometry is an important technique in affordable healthcare and cellular research. Some efforts toward establishing a personal, low-cost cytometer have been described in the literature. However, a self-assembled fluorescence microscope requires software for cytometric analysis. There are some open-source image-based software analysis applications available. However, for a quantitative analysis of images, software that can generate data comparable to those of previously evaluated cytometric analyses programs is required. Hence, the aim of this study is to compare results of a commercially available image cytometry program to data obtained using the open-source software CellProfiler (CP). Leukocytes and fluorescent bead images obtained using a Laser Scanning Cytometer were analyzed by CP and the results compared with those of conventional cytometric analyses' programs. Algorithms were developed enabling the analysis of leukocytes and beads by CP. CP provided similar results to those obtained by the cytometer software. Hallmark parameters, including cell count and fluorescence intensity, revealed a high correlation in the analysis of both programs. Therefore, CP is appropriate for cellular analysis on a self-assembled microscope, thereby enabling affordable cytometry.     

金安桥水电站大坝抗震分析和抗震措施设计

金安桥水电站大坝地震设防烈度高达9度,基岩场地设计水平动峰值加速度为0.399 g,大坝抗震分析和抗震措施设计是工程关键性技术问题之一。采用数值计算法和模型试验法对碾压混凝土大坝进行了全面的动力分析,确定了大坝的抗震薄弱部位,为金安桥水电站大坝设计提供了保证。     

广义数学形态滤波器在风电机齿轮箱故障诊断中的应用

在形态滤波算子和形态结构元素的基础上,提出采用不同结构的结构元素级联形成广义数学形态滤波器,实现风电机齿轮箱振动信号的降噪方法.用一个既有振幅调制,又有相位调制的非平稳信号仿真了故障齿轮箱的齿轮振动信号,对仿真信号采用提出的广义数学形态滤波器进行了处理.处理结果表明,提出的广义数学形态滤波器能有效消除噪声,用于对风电机齿轮箱的故障检测是可行的.     

水轮发电机转子系统磁悬浮装置 结构优化设计

针对水轮发电机混合磁悬浮承重系统中电磁悬浮装置局部磁饱和问题,进行了结构优化设计,提出了适当增加推力盘及电磁铁顶部厚度的方法,有效地减轻了电磁悬浮装置局部磁饱和现象,同时也使总的磁浮力有所增加。从承载力与漏磁角度考虑,得出了推力盘及电磁铁顶部厚度的最佳设计值。     

桥巩水电站机组主要参数和结构特点

桥巩水电站安装8台大型灯泡贯流式机组,单机容量57 Mw,目前国内最大,世界第二,设计、制造难度较大,文章简述水轮发电机组的主要参教及其主要结构特点.     

多功能全悬臂模板的设计及应用效果

根据桥巩水电站工程混凝土浇筑的施工特点,设计出一种实用新型多功能全悬臂大型钢模板,其应用效果显著.通过对模板体系的合理设计和关键杆件的分析计算,确保模板结构安全,使用方便,达到了混凝土外观质量提高、节约施工成本、加快了施工进度等较好的技术经济效果.     

严寒高地下水位地区检查井结构设计

针对北方严寒高地下水位地区,检查井在冬季运行期间,由于地下水的渗透,经常被冰层覆盖,无法正常运行的问题,采用焊接钢板成箱式检查井,使其密封不透水,从而有效地解决了严寒高地下水位地区检查井的冻胀及结冰病害问题.