Integrated coastal water monitoring

Geographical Information Systems (GIS) are important took for environmental monitoring and management. However, their limitations in dealing with complex, dynamic, and mission‐critical situations call for alternative approaches. Integrating GIS with dynamic simulation models offers one such solution. Numerical models that simulate physical, chemical, and biological processes greatly increase our understanding of the environment. Many of these models use refined forecast information to accurately predict processes that help in monitoring and managing the environment. Integrating these models with GIS offers new functionalities. The present research couples the MIKE21 comprehensive modeling system for two‐dimensional free surface flows with the spatial analysis strengths of the ArcView GIS. The southern coastal water system of Singapore serves as the study area. The aim is to develop a comprehensive software system that provides support for both environmental managers and land‐use planners in making their decisions.     

罗兰C TOA-ASF测量系统设计与实现

附加二次相位因子（ASF）是影响罗兰C导航/授时系统精度的主要因素。进行ASF修正主要有理论预测法和实测法两种。针对罗兰C到达时间ASF实测修正的需要,本文给出了ASF测量系统的测量原理和测量系统组成,详细介绍了测量系统的设置、软硬件设计。车载试验表明,该测量系统的设计是成功的,能够满足ASF实测的需要。     

地铁防淹门系统调试技术要点

为保证地铁运营服务和行车安全,防淹门系统必须通过单体调试和综合联调以验证其控制功能、监控功能的实现和整个系统的稳定性。单体调试从水位信号、门体信号、锁定装置信号、门体控制等方面进行测试,综合联调验证防淹门系统与综合监控系统、信号系统的接口功能。介绍了防淹门系统的结构和功能,介绍了单体调试和综合联调的技术内容及重点关注的问题。     

安康市汉江景观桥设计方案研究

安康依汉江而建，桥位处周边建筑具有重要的历史文化意义，且桥位两边连接安康重要的街道和火车站。汉江景观桥在桥位走向、桥型选择与周边历史文化的契合度、景观桥与汉江两边道路的衔接等方面是重点研究的课题，从设计思路、功能定位、桥位比较、桥型方案、造价等对安康市汉江景观桥设计方案进行了研究。     

某款双滤芯尿素液位传感器的设计

随着排放要求的日益严峻,重型卡车柴油发动机普遍寻求近乎极限的排放标准。为应对严格的排放标准,EGR+DOC+DPF+SCR+ASC的后处理方式成为国内绝大多数主机厂选择的最终方案。文章将着重分析和探讨目前国内某款国Ⅵ重型卡车柴油发动机SCR尿素供给系统中,为精细过滤尿素溶液所设计的双滤芯结构液位传感器在设计和布置过程中的创新应用。     

城市轨道交通车辆能耗计量及管理系统

介绍了城市轨道交通车辆能耗计量及管理系统的结构、功能.城市轨道交通车辆能耗计量及管理系统采用六通道能耗计量装置和RFID(射频识别)列车定位技术,实现了对地铁车辆能耗的分类计量.建立GPRS(通用分组无线服务)无线传输数据机制和地铁车辆能耗管理平台,处理并存储能耗数据,自动生成曲线和统计报表,实现地铁车辆能耗信息化管理.该系统已在上海轨道交通1号线01A02车型上试点应用,基本功能已得到验证.     

加强公路养护体制改革后企业的资金管理

随着公路体制改革的发展,经济环境发生了根本性的变化,企业经济增长方式由粗放型逐步转向集约型。加强财务管理是企业可持续发展的一个重要环节,也是企业财务管理中的一项重要工作目标。文章针对内蒙古牙克石市公路养护管理站财务管理中存在的问题提出对策。     

某高速公路隧道水害原因分析及治理

公路隧道运营过程中极易发生水害,针对宝牛高速公路某隧道的水害现象进行实地勘察和取样分析,综合提出了简单易行的解决方案,并取得了良好的治理效果。     

Enhancing grey prediction fuzzy controller for active suspension systems

A grey prediction fuzzy controller (GPFC) was proposed to control an active suspension system and evaluate its control performance. The GPFC employed the grey prediction algorithm to predict the position output error of the sprung mass and the error change as input variables of the traditional fuzzy controller (TFC) in controlling the suspension system to suppress the vibration and the acceleration amplitudes of the sprung mass for improving the ride comfort of the TFC used; however, the TFC or GPFC was employed to control the suspension system, resulting in a large tire deflection so that the road-holding ability in the vehicle becomes worse than with the original passive control strategy. To overcome the problem, this work developed an enhancing grey prediction fuzzy controller (EGPFC) that not only had the original GPFC property but also introduced the tire dynamic effect into the controller design, also using the grey prediction algorithm to predict the next tire deflection error and the error change as input variables of another TFC, to control the suspension system for enhancing the road-holding capability of the vehicle. The EGPFC has better control performances in suppressing the vibration and the acceleration amplitudes of the sprung mass to improve the ride quality and in reducing the tire deflection to enhance the road-holding ability of the vehicle, than both TFC and GPFC, as confirmed by experimental results.     

高速公路联网收费网络安全性探讨

结合云南省东南区域联网收费网络的情况,从收费系统网络结构、收费系统硬件平台、收费系统操作平台、收费系统数据库平台、收费系统业务平台等几方面,就如何提高收费网络安全性的问题进行了探讨。动态路由、VLAN技术和3层交换技术的综合运用,使该系统收费网络的稳定运行取得了良好的效果。对今后高速公路联网收费系统的设计和实施具有一定的参考价值。