某高速公路K85～K86滑坡稳定性分析

地质勘察表明,该滑坡目前处于相对稳定状态,但在地震、降雨和渗水作用下,该滑坡易于滑动。若公路以反压通过,经计算无安全隐患。     

水下多目标跟踪的网络层次决策方法

水下多目标跟踪逻辑与决策是水下航行器多目标跟踪中需解决的技术难点．目前用于水下多目标跟踪决策的方法都假设各个决策因素相互独立,而实际上水下多目标跟踪决策的因素之间存在着相互影响．本文根据这一特点,建立了水下多目标跟踪决策的指标集和相应的ANP决策模型,提出了基于ANP的水下多目标跟踪逻辑与决策方法．该方法将水下多目标跟踪决策的指标集纳入网络层次结构模型,并通过模型解算得到优化的多目标跟踪决策,具有决策结果比现有方法更加合理、稳健的特点．仿真结果表明该方法是在多目标跟踪决策因素之间存在相互影响情况下解决水下多目标跟踪逻辑与决策问题的有效方法．     

陕北黄土地区铁路复线施工中的软基处理

根据包西铁路鱼和至米脂新增二线地段软基处理的实践,阐述了陕北黄土地区软基的成因和特点,论述了黄土地区既有线侧软基处理的方案比选和优化,总结了复线施工中既有线软基处理施工的特点和注意事项。     

CFG桩在温福铁路中的应用

温州—福州铁路对厚度在8~25 m的深厚软土采用了水泥粉煤灰碎石(CFG)桩进行加固,并采用了“桩—网”结构的加固模式。文章以连江车站为例介绍此施工方法的技术要求、工作垫层、试桩、CFG桩施工工艺、控制要点及加固效果。     

A DYNAMICAL SYSTEM ALGORITHM FOR SOLVING A LEAST SQUARES PROBLEM WITH ORTHOGONALITY CONSTRAINTS

Introduction　　 During the past decade,many people havebeen interested in solving problems in optimiza-tion,matrix algebra,signal processing and manyotherfields by dynamical system(neural networks)algorithms[1～ 3 ] .The significance benefit is thatthis kind of algorithms can be realized by someproperly designed hardware (electronic implemen-tation) and thus desired solutions can often be ob-tained in a fast speed,real time algorithms forproblems considered are therefore provided.In thispaper…     

A method of multi-channel reference signals acquiring in broadband ANC

In a flank array on an unmanned underwater vehicle （UUV）, self-generated noise which has broadband and colored spectrum property in frequency and spatial domain is the main factor affecting the performance of weak signal detection, so the technique of adaptive noise cancellation （ANC） as well as physical denoising and active noise cancellation are often used in practice. Because ANC is based on correlations, improvements in performance come from better correlation between reference signals and primary signals. Taking full advantage of the characteristics of flank arrays and the characteristics of information obtained from hydrophones, a new method for reference signal acquisition for adaptive noise cancellation is proposed, in which the multi-channel reference signals are obtained by accurate delaying for a given direction of arrival （DOA） and differencing between adjacent outputs of array elements. The validity of the proposed method was verified through system modeling simulations and lake experiments which showed good performance with little additional computational burden.     

为政府分忧解难西安公交车气改油

针对西安市目前的加气难问题，为了保证市民生活用气，缓解出租车加气压力，西安公交总公司从2009年12月24日起将加气时间进行调整，并将2000多部公交车辆由烧气改烧油。     

LMS自适应时延估计法在被动定位系统中的应用研究

小均方（ＬＭＳ）自适应时延估计法不依赖于输入信号和噪声的统计先验知识而可以跟踪动态或时变的环境和参数,算法亦比较简单。计算机仿真和湖试分析数据分析表明,将ＬＭＳ自适应时延估计法应征地被动定位系统,可以获得较高的定位精度,另外,对影响被动定位精度的因素进行了分析。     

基于层次分析法的水下多目标威胁评估模型

由于海洋环境的复杂性和水声信道的特殊性,水下多目标威胁评估一直是水声信号处理领域的难题。目标威胁评估是目标分配的重要依据,是区分目标的轻重缓急,为多目标攻击决策提供依据的保证。本文基于某型鱼雷,对影响水下多目标威胁评估的各种因素进行了分析,提出了基于层次分析方法的水下多目标威胁评估模型,并通过实例演示了评估的过程。该方法有效地解决了水下多目标威胁评估和排序问题,并提高了鱼雷的作战效能。     

预应力管桩桩网结构加固软基施工控制技术

介绍温福铁路软土地区预应力管桩桩网结构加固软土路基的主要施工工艺、技术细节和控制检测要点。