岩石里氏硬度值与单轴饱和抗压强度相关性分析初步探讨

隧道施工期关于岩石坚硬程度指标的准确获取，是隧道围岩快速分级面临的实际问题，现行规范要求采用岩石单轴饱和抗压强度作为岩石坚硬程度的定量指标。为寻求关于岩石单轴饱和抗压强度最优的替代方案，对岩石单轴饱和抗压强度的不同替代方案和指标的优缺点进行分析比较，并通过使用里氏硬度计对不同岩性的岩石进行室内试验分析，研究泥岩类岩石和砂岩类岩石里氏硬度值与单轴饱和抗压强度之间的关系。利用数理统计软件SPSS24.0对岩石的里氏硬度值及单轴饱和抗压强度值进行回归分析，指出里氏硬度值与岩石单轴饱和抗压强度二者存在相关关系，且相关性较强，并构建不同岩性的岩石在饱和状态下单轴抗压强度与里氏硬度值的回归预测方程。     

基于级配理论的连续式搅拌设备冷料分级与料仓设置

为了确定连续式搅拌设备的冷料分级与料仓数量,基于Superpave与Bailey法级配设计理论,通过分析粗集料和细集料对混合料性能的影响,确定了控制混合料质量的关键粒径尺寸为第一控制筛孔尺寸、限制区筛孔尺寸、1/2公称最大粒径及公称最大粒径;结合当前常用的各类沥青混合料粒径尺寸,得出结论:为了满足生产各类型常用沥青混合料的需要,搅拌站应设置不少于8种不同规格的集料,冷料仓数量不宜少于6个。     

空间测量雷达目标分类与识别算法及其能力分析

对空间测量雷达目标分类与识别算法的结构及其工作过程作了介绍，并对该雷达的目标分类与识别能力进行了分析。     

船舶通信导航设备如如何取得外国船级社认证许可

为使在国外船级社注册的船舶顺利通过船级社的检验并获得许可证,提出有关船舶通信和导航设备检验中应注意的问题。     

加权支持向量机在机器状态识别中的应用

在机器状态识别中采用加权SVM算法,对类别差异造成的影响进行了相应的补偿,从而提高了小类别的分类精度,这对于需要重点关注小类别精度的应用场合有重要的现实意义,以某减速箱轴承为例,取得了较好的实验结果。     

The use of vehicle acceleration measurements to estimate road roughness

Road roughness is a broad term that incorporates everything from potholes and cracks to the random deviations that exist in a profile. To build a roughness index, road irregularities need to be measured first. Existing methods of gauging the roughness are based either on visual inspections or using one of a limited number of instrumented vehicles that can take physical measurements of the road irregularities. This paper proposes the collection of data from accelerometers fixed in a specific vehicle type and the use of this data to estimate the road condition. Although the estimate is approximate, accelerometers are being increasingly used by car manufacturers to improve suspension performance and the proposed method is relatively inexpensive to implement and provide road managers with constantly updated measurements of roughness. This approach is possible due to the relationship between the power spectral densities of road surface and vehicle accelerations via a transfer function. This paper shows how road profiles can be accurately classified using axle and body accelerations from a range of simulated vehicle–road dynamic scenarios.     

ATCEM: a synthetic model for evaluating air traffic complexity

Air traffic complexity, which measures the disorder of air traffic distribution, has become the critical indicator to reflect air traffic controller workload in air traffic management (ATM) system. However, it is hard to assess the system accurately because there are too many correlated factors, which make the air traffic complexity nonlinear. This paper presents an air traffic complexity evaluation model with integrated classification using computational intelligence (ATCEM). To avoid redundant factors, critical factors contributing to complexity are analyzed and selected from numerous factors in the ATCEM. Subsequently, to construct the mapping relationship between selected factors and air traffic complexity, an integrated classifier is built in ATCEM. With efficient training and learning based on aviation domain knowledge, the integrated classifier can effectively and stably reflect the mapping relationship between selected factors and the category of air traffic complexity to ensure the precision of the evaluation. Empirical studies using real data of the southwest airspace of China show that the ATCEM outperforms a number of state‐of‐the‐art models. Moreover, using the critical complexity factors selected in ATCEM, the air traffic complexity could be effectively estimated. Copyright © 2015 John Wiley & Sons, Ltd.     

基于克隆选择算法的模糊规则提取方法

结合人工免疫系统的克隆选择原理,采用克隆算法进行优化,提取通过多精度模糊分割产生的大量模糊if-then规则中的优质分类规则,建立了模糊分类所需要的有效规则集来实现分类的目的.由该方法所提取的模糊规则集具有分类正确率高、规则数目较少及识别时间短的特点.     

对国家内河航道等级划分的新思考

航道等级的合理划分是水运可持续发展的保证。本文分析了我国内河航道现状和国标GBJ139-90中等级划分存在的问题,建议提高最低航道等级尺度,并提出了高等级航道定义。     

聚类分析在长江三角洲地区港口分类中的应用

分析了长江三角洲港口分类的必要性，阐述了聚类分析的原理和应用方法，应用聚类分析对长江三角洲港口进行了分类，并提出了定位建议。为港口分类和布局提供了依据和方法。