基于模糊综合评判法的深基坑支护工程稳定性分析

在模糊数学理论与相容矩阵分析法相结合的基础上,针对深基坑支护工程影响因素的特点,作者提出了深基坑支护工程的模糊综合评判法,其中采用了相容矩阵分析法确定影响因素的权重。文中通过算例来验证所提方法的实用性,分析结果与实际情况相符。     

A new method to accurately measure the drift of shipborne floated gyro

1Introduction Aninertialnavigationsystem(INS)isusedwidelyin manymilitaryandcivilscopesbecauseofitsindepend entabilitytowork.TheprimarydisadvantageofINSis thatthepositionerrorincreaseswithtime.Erroranaly sisofanINSmodelhasidentifiedthemainproblemis gyrodri…     

福建省港口物流业发展

阐述港口物流发展的历程,分析福建省港口物流发展现状,为切实贯彻和落实国务院《关于支持福建省加快建设海峡西岸经济区的若干意见》的精神,发展港口物流,构建促使生产要素整合、协调和优化的港口物流平台,加快海峡西岸经济区建设,提出福建省港口物流业发展思路：进一步完善港口物流基础设施建设;区港联动,发展物流业;加快港口物流信息化建设;加快对物流专业人才的培养;发展港口物流联盟。     

聚氨酯夹层隔振特性及模型试验研究

The vibration isolation performances of typical hull structure with viscoelastic interlayer are analyzed ac-cording to wave theory, and the influences of interlayer Young's modulus and length on the vibration reduction are dis-cussed. The theoretical analysis shows that combination of polyurethane interlayer with blocking mass can enhance the vibra-tion isolation performance and expand isolation frequency band. In order to verify the effectiveness of polyurethane interlay-er, the model test of power cabin's vibration is carried out. The test data shows that the reduction of 20–1000 Hz variation acoustic level at hull shell is more than 5 dB.     

轻型高速公路基本通行能力研究

采用理论分析、实测数据验证和计算机仿真相结合的方法,对轻型高速公路的基本通行能力进行了初步的研究,提出了轻型高速公路基本路段在不同车道宽度、不同设计速度条件下单车道、双车道和三车道的基本通行能力.     

上海轨道交通运能规划实践与分析

轨道交通网络化规模与客流不断增加,在高峰时段线路或区段的运能无法适应如此大的客流。分析当前客流预测存在的问题,以及设施设备、车辆配属、服务水平等限制因素,提出解决措施:提高客流预测的准确性,提早做好运能规划,建立长期动态规划机制。     

Performance comparison of multicast routing protocols based on NS-2

The electronic system in a comprehensive shipboard has a extremely wide bandwidth. It supports synchronized and asynchronous data transmission, multimedia correspondence, and videophone conferencing. In order to guarantee the security and correspondent real time of the communication, choosing a multicast routing protocol based on different applications is a key problem in terms of the complexity of the system. A simulation model was first designed for existing multicast routing protocols in NS-2 and analysis was performed on their corresponding application environments. The experiments proved that PIM-DM based on the shortest-path tree protocol is suitable for communication in the field of comprehensive shipboard. Further work that is necessary is also discussed.     

郑州航空港区与中心城区轨道交通衔接方案

为了加强郑州市中心城区和航空港区2个中心之间的便捷联系,引导和促进航空港经济综合实验区的发展,在现有郑州市轨道交通线网中缺乏可直接联系2个中心的轨道交通线路的背景下,通过对航空港经济综合实验区概念性总体规划及交通需求的分析,提出航空港经济综合实验区与中心城区轨道交通衔接的5个方案。经过比选,推荐方案1,即与轨道交通2号线的衔接方案,该方案功能较为完善、合理,可实施性强,可为外围新城与中心城区轨道交通衔接的类似工程提供一定的借鉴和参考。     

Current Density Distribution in Gas Tungsten Arc Welding Process

IntroductionWeldingisacriticaltechnologyinbuildingnuclearreactors,shins,piPelinesandinatomobilemanufaCtuing.BatuPtil1noWtheearemanyproblemsinPractice,understandingthedeVlopmentoftheweldpoolduringweldingisofconsiderablePracticalsignificance.BecauseofthecomPlexityoftheprocessandtl1ePresenceofthebrightarc,directexPerimentalinvestigationsareextremelyexPensiveandoftenimPossibleorimPracticable,thensomemathematicalmethodsareadoptedtosett1PthetfansiellttemPerattirefieldandthefluidflowfieldofthew…