浅谈锅炉中的低温腐蚀和烟气脱硫

为提高火力发电厂锅炉的热效率,延长锅炉的使用寿命,保护环境,提出了低氧燃烧和烟气脱硫两种方案。     

余热排出系统管道热疲劳分析模型及寿命预测

余热排出系统管道发现的热疲劳裂纹问题关系到压水堆的安全。本文基于开源有限元软件Code_Aster,采用Lagoda-Macha-Sakane模型预测了余热排出系统管道材料304L不锈钢的疲劳寿命,并根据预测结果提出了改进的Lagoda-Macha-Sakane模型。采用改进的Lagoda-Macha-Sakane模型对余热排出系统管道的热疲劳寿命进行了预测,结果表明预测热疲劳寿命与试验热疲劳寿命吻合。     

一种实拍图像的高光去除方法

根据双色反射模型,通过分离出漫反射分量的方法,获得了对图像中的高光去除的结果。同时,针对双色反射模型要求的相机响应函数必须满足线性关系,但实际拍摄图像为非线性关系的问题,提出了基于参数自适应确定的伽马变换漫反射分离方法。实验结果表明,该方法可对实际拍摄的图像完成有效的高光去除。     

基于图像处理的公路车流量统计方法的研究

本研究提出了一种车流量的统计算法,处理步骤包括:提取与更新道路背景图像、使用自适应阈值提取运动车辆、去除车辆阴影、区分不同车辆和利用车辆中心的连续匹配来确定车辆数目,该算法不受车道的限制,人为影响小,计数准确性高。实验结果表明,本算法能够适应道路背景的多种变化,实现车辆的准确计数。     

三维模型的二维矢量化机制的研究与实现

论述了三维模型二维图形矢量化的必要性,详细描述了一种三维模型的二维矢量化机制,包括三维模型的一致化建模方式以及模型的组织与分层聚合方法,并对以往的隐藏几何元素消除算法做出改进,使其适应三维空间曲面的情况。     

微波处理油田采出水的研究

通过试验研究和分析微波对油田采出水中含油率和聚合物的降解作用,主要探讨水浴加热、微波功率、反映时间等参数与含油率、聚合物的含量关系,总结出各参数对除油率的影响规律和聚合物的降解规律。结果表明：微波对油田采出水具有良好的处理效果,当微波功率为800W,加热时间为70s时,处理效果最好;功率和加热时间的增大对聚合物都有降解趋势,聚合物的降解能够加快油田采出水的除油率。     

A Study of Removing Chlorobenzene by the Synergistic Effect of Catalysts and Dielectric-Barrier Discharge Driven by Bipolar Pulse-Power

In this study, the improvement in the removal of chlorobenzene （C6H5Cl） in the air was investigated by combining dielectric barrier discharge （DBD） driven by bipolar pulse-power with catalysts. Molecular sieve 4A （MS-4A） and MnO2/γ-Al2O3 （MnO2/ALP） as two kinds of catalysts were tested at different positions in a DBD reactor. Catalysts were located either in the discharging area between two electrodes, or just behind the discharging area （in the afterglow area） closed to the outlet. The results indicated that DBD reactor with a bipolar pulse power-supply produced strong instant discharge and energetic particles, which can effectively activate catalysts of MS-4A and MnO2/ALP located in the afterglow area to achieve the synergistic effects on effective fission of chemical bonds of chlorobenzene. It was considered that the gas-chlorobenzene and the chlorobenzene adsorbed on the catalysts were decomposed simultaneously.     

Discharge Plasma Assisted Adsorbents for Exhaust Treatment： A Comparative Analysis on Enhancing NOx Removal

An analysis has been made on the discharge plasma coupled with an adsorbent system for NOx removal. The cascaded plasma-adsorbent system may be perceived as a better alternative for the existing adsorbent-based abatement system in the industry. In this study the exhaust is sourced from a diesel generator set. It was observed that better NO removal in a plasma reactor can be made possible by achieving higher average fields and subsequent NO2 removal can be improved using an adsorbent system connected in cascade with the plasma system. The paper describes various findings pertaining to these comparative analyses.     

硅胶颗粒中杂质在线识别方法与剔除装置的设计及研究

为了实现硅胶颗粒中杂质的自动剔除，提出杂质识别算法，并设计了自动化的杂质剔除装置。首先通过摄像机实时采集硅胶散料图像，利用Visual C++ 结合OpenCV将图像进行预处理、形态学运算、边缘检测等过程，将杂质识别定位。然后基于RS-232通讯协议实现与单片机通讯，传递杂质的位置信息，控制相应的剔除机构动作，最终实现硅胶与杂质的分离。经验证，本系统能够有效地对杂质的进行识别和剔除，其剔除率达到95%，满足设计要求。本装置采用了“分区域剔除算法”结合“高压气体”的方式进行杂质剔除，具有动作响应快、剔除精度高的优点，有效提高生产效率，降低生产成本。     

CrackTree: Automatic crack detection from pavement images

Pavement cracks are important information for evaluating the road condition and conducting the necessary road maintenance. In this paper, we develop CrackTree, a fully-automatic method to detect cracks from pavement images. In practice, crack detection is a very challenging problem because of (1) low contrast between cracks and the surrounding pavement, (2) intensity inhomogeneity along the cracks, and (3) possible shadows with similar intensity to the cracks. To address these problems, the proposed method consists of three steps. First, we develop a geodesic shadow-removal algorithm to remove the pavement shadows while preserving the cracks. Second, we build a crack probability map using tensor voting, which enhances the connection of the crack fragments with good proximity and curve continuity. Finally, we sample a set of crack seeds from the crack probability map, represent these seeds by a graph model, derive minimum spanning trees from this graph, and conduct recursive tree-edge pruning to identify desirable cracks. We evaluate the proposed method on a collection of 206 real pavement images and the experimental results show that the proposed method achieves a better performance than several existing methods.