基于主客观安全性的高速公路评价研究

根据公路线形空间几何特性,采用高速公路空间曲率指标作为客观指标,根据驾驶员NASA-TLX评价量表计算的主观指标,并针对道路交通安全概念的模糊性,运用聚类分析,构建了高速公路主客观安全性的方法与模型。实例表明,符合客观实际,为今后进行高速公路线形安全性评价提供参考。     

基于机器视觉的路面破损检测系统研究

分析了系统的基本组成和总体结构,介绍了软件设计流程以及网络设计与训练过程.同时考虑到传统图像分割算法的局限性,设计了一种检测图像内任意区域实时检测算法.可以适应路面龟裂、横裂、纵裂、块裂等多种缺陷以及缺陷并存的复杂道路样本图像.     

加权Voronoi图在轨道交通突发事件下公交应急管理中的应用

轨道交通应急管理是城市轨道交通运营管理的重要内容。为了解决轨道交通突发事件下的客流疏散问题．提出将加权Voronoi图应用于城市轨道交通突发事件的应急管理,该方法计算简单易于实现。最后通过实例验证其可行性。     

基于GPRS的混合动力试验台架远程数据采集系统研发

为了实现数据的远程传输,文章给出了一种采用GPRS技术将单片机采集的数据传输到监控中心的方案。在该系统中,单片机的AD口把传感器采集的模拟量转化为数字量,再通过GPRS网络和Internet网络把数据传输到上位机。以采集混合动力试验台架转速转矩的试验结果表明,此系统实现了数据的实时采集、处理、远程传输和监控等功能。     

语用顺应论在口译介绍语类中的研究

语言顺应论认为语言的使用即选择。语言的使用要顺应不同的交际对象和环境。本文从顺应论的四个角度,即:语言的语境顺应、语言结构顺应、动态顺应以及顺应过程的突显性,探讨了介绍语类的口译过程。在这个过程中,译员要动态地选择顺应对象和口译策略,最大限度地实现相应的语言顺应。     

Filter bank based nonlocal means for denoising magnetic resonance images

Image denoising is a classical problem in image processing. Its essential goal is to preserve the image features and to reduce noise effectively. The nonlocal means （NL-means） filter is a successful approach proposed in recent years due to its patch similarity comparison. However, the accuracy of similarities in this algorithm degrades when it suffers from heavy noise. In this paper, we introduce feature similarities based on a multi- channel filter into NL=means filter. The multi-bank based feature vectors of each pixel in the image are computed by convolving from various orientations and scales to Leung-Malik set （edge, bar and spot filters）, and then the similarities based on this information are computed instead of pixel intensity. Experiments are carried out with Rician noise. The results demonstrate the superior performance of the proposed method. The wavelet-based method and traditional NL-means in term of both mean square error （MSE） and perceptual quality are compared with the proposed method, and structural similarity （SSIM） and quality index based on local variance （QILV） are given.     

分离式基础柔性防撞装置结构分析方法比选

采用杆系单元、实体单元对宜昌夷陵长江大桥防撞装置结构进行有限元分析,并与m法计算的水平位移及作用效应进行对比。结果表明,杆系单元的计算结果与实体单元的计算结果相差很小,并且建模过程简单快捷;m法的计算结果与有限元的相差较大,且计算过程繁琐;研究结果可为类似柔性防撞结构分析以及设计提供参考。     

Genome-wide profiling identifies Saccharomyces cerevisiae response in PKC-SLT2 signaling and glycogen metabolic pathways to antifungal compound calcofluor white

Fungal infection remains a major problem worldwide, yet treatment options are limited owing to the lack of effective drugs, the significant toxicity of available compounds, and the emergence of drug resistance. The low toxicity of calcofluor white （CFW） is an attractive antifungal compound for its known inhibitive effects on trichophyton rubrum and candida albicans growth. However, the efficacy of CFW is limited in most cases. In order to search for effective means to improve its efficacy, using saccharomyces cerevisiae as a model, we have used microarrays to examine the cell＇s response when treated with CFW on the genome scale. We found that both the PKC-SLT2 （i.e, protein kinase C-mitogen activated protein kinase） and the glycogen metabolic pathways are activated upon CFW treatment. These results suggest that the key components in these pathways could be targeted by other drugs to counter the cell＇s compensative response, thus to further substantiate the inhibitive effect of CFW on fungal growth, which may lead to treatment regimens with improved efficacy of this compound in clinical applications.     

胎儿和幼儿跖趾骨血液供应的观察

采用微血管造影等方法,观察30例胎、幼儿跖趾骨的血供。结果表明:胎儿期跖趾骨骨干和两端软骨逐渐增大,出现滋养动脉和软骨管,幼儿期两端软骨逐渐变小,软骨管也逐渐消失。提示软骨管的出现与软骨块的大小有关,软骨管是胎儿软骨内的临时血管系统。跖趾骨血供特点:①跖趾骨血供的不均称性分布,即骺端软骨血供丰富,这与两端生长能力不同相适应;②远趾只骺端有软骨管分布,这与只骺端有生长能力相适应,说明跖趾骨血供与其生长发育有密切关系。     

国Ⅳ车辆燃用国Ⅲ柴油的影响研究

本文通过对国Ⅳ车辆使用国Ⅲ柴油时的整车性能及排放进行试验数据分析及研究,得出国Ⅳ车辆在短期内限定工况下可以使用国Ⅲ柴油,但排放不能完全达到国家第Ⅳ阶段车用压燃式发动机与汽车污染物排放标准,且影响车辆性能不宜长期使用的结论,为国Ⅳ产品的设计、售后服务提供依据和参考。