北京地铁9号线综合监控系统南北段贯通调试方案

结合北京地铁9号线综合监控系统南北段分期开通的实际情况,论述贯通调试的实施准备、贯通方案、调试过程和最终的数据验证。在各方人员和组织的配合下,按照中心、车站的不同实施需求,按不同的系统专业,分步骤地合理实施调试方案,为以后类似工程设计提供参考。     

新材料AC—K5在高速公路桥梁伸缩缝快速维修中的应用

路面坑洞修复剂（AC-K5）是一种针对道路病害的水泥基修复材料.介绍了路面坑洞修复剂（AC-K5）在山丹至临泽高速公路快速维修桥梁伸缩缝的应用过程.工程实践表明,利用路面坑洞修复剂（AC-K5）进行桥梁伸缩缝快速维修,施工方便,养生期短,修复效果良好,其作为高速公路桥梁伸缩缝的接缝料是切实可行的.     

基于模糊层次分析法的危险品物流企业安全评价

将基于模糊层次分析法（FAHP）的模糊评判应用到危险品物流企业安全评价中,构造了物流企业安全评价指标体系,采用三角模糊数来表示专家学者的打分信息,建立了各层次的互补判断矩阵;然后采用FAHP法对各影响因素的重要性进行排序,根据各影响因素的模糊程度构建模糊综合评价矩阵;最后结合实例进行试算,验证了该方法的可行性。     

救捞系统战略性绩效管理体系的建立

总结近年来在救捞系统试点单位实施综合绩效考核的经验教训,并结合具有代表性的企事业单位开展的绩效考核工作调研情况,为救捞系统实施综合绩效考核带来有益启示,并提出基本思路,利用救捞系统战略性绩效管理体系（包括绩效管理目标体系、实施体系、制度体系和保障体系）定期、全面地评价职工的工作业绩、态度和能力,激励职工持续改进绩效从而实现战略目标。     

CGCS2000及WGS84坐标系若干问题探讨及应对策略

详细介绍了CGCS2000和WGS84坐标系、1980年西安坐标系、1954年北京坐标系的定义、特点和用途以及相互之间的区别和联系,重点探讨了CGCS2000及WGS84坐标的获取方法、新旧坐标系统精确转换等问题,通过工程案例进行了进一步说明。     

基于因素关联的航运公司安全管理能力评价方法

安全管理能力是航运企业运营管理的重要内容,而评价指标中的关键绩效指标其实是相互影响的。为了对航运公司安全管理能力进行评估,在航运公司安全管理有效性评价模型的基础上,建立各评价指标之间的影响关系;采用DEMATEL方法计算各指标的影响度、被影响度和中心度,提出将规范化后中心度作为评价指标的权重数值。最后,基于该权重利用证据合成算法对航运公司安全管理进行评估,并运用案例证实该方法的可行性。     

基于无线网络的能耗实时监测系统

为了进一步提高企业能耗管理水平,设计了一种基于无线网络的能耗实时监测系统。根据系统的设计需要,DTU将能耗传感器采集到的数据通过无线网络将数据及时传送到监测中心。实验证明,该系统可以对企业能耗状态进行远程无线监测。     

船舶艏部声呐罩水动力噪声评估

文章针对非规则形状的艏部声呐罩,基于统计能量理论,建立了艏部声呐罩自噪声的理论模型,并分析了非透声窗吸声系数和过渡区声源对声呐罩噪声的影响。经对过渡区声源高频噪声影响的计算修正,大大提高了计算精度。试验验证表明,过渡区附近腔体自噪声计算结果与测试值相差小于5 dB,较好地反映了腔内自噪声分布规律。     

Region of interest based selective encryption scheme for privacy protection in H.264 video

A selective encryption scheme for region of interest （ROI） of H.264 video is proposed to protect the personal privacy in a video. The most important part of video can be protected with less cost and operation by only encrypting the content of ROIs. Human face regions are selected as ROI and detected by using Gaussian skin color model. Independent ROI encoding is realized with the mechanism of flexible macro-block ordering （FMO）. Frames are divided into grid-like slice-groups which can be combined flexibly to form a required ROI. Both luminance component and chrominance component of the macro-blocks in ROI are modified to achieve good encryption quality and location accuracy. In the process of decryption, the encrypted area is located automatically. There is no need to transmit additional position information of ROIs to the end of decryption. The encrypted video is decrypted correctly with the secret key. JM18.4 software is employed to perform the simulation experiment. Experimental results show the accuracy and effectiveness of our scheme to encrypt and decrypt the ROIs in H.264 video.     

A new algorithm to automatically extract the drainage networks and catchments based on triangulation irregular network digital elevation model

A new algorithm to automatically extract drainage networks and catchments based on triangula- tion irregular networks （TINs） digital elevation model （DEM） was developed. The flow direction in this approach is determined by computing the spatial gradient of triangle and triangle edges. Outflow edge was defined by comparing the contribution area that is separated by the steepest descent of the triangle. Local channels were then tracked to build drainage networks. Both triangle edges and facets were considered to con- struct flow path. The algorithm has been tested in the site for Hawaiian Island of Kaho＇olawe, and the results were compared with those calculated by ARCGIS as well as terrain map. The reported algorithm has been proved to be a reliable approach with high efficiency to generate well-connected and coherent drainage networks.