基于洞口标准横断面的斜交涵洞长度计算方法

通过对涵洞长度计算中有关因素进行分析,简要总结了一种高等级公路斜交涵洞长度计算方法。     

舰艇作战系统协同显控台技术研究

显控台作为舰艇作战系统的主要装备之一经历了三个发展阶段。针对协同显控台介绍了其系统组成和实现方案，并对显控台技术的发展趋势作了简要分析。     

摇枕心盘面夹砂分析

分析了型砂、浇注系统及人工操作3方面对摇枕心盘面夹砂的影响,找出了摇枕心盘面夹砂的根本原因,采取了提高干强度、加强原砂含泥量控制、增加内浇道数量以及在内浇道增加过滤网等措施.     

公共工程建设项目的政府采购

公共工程是政府采购的一项重要内容，而在我国的具体实际中，工程建设往往被排除在政府采购之外。随着《政府采购法》的颁布实施，这一状况必须得到改变。此从招标投标与政府采购的关系谈起，论述了将公共工程纳入政府采购之中的必要性，并提出公共工程推行政府采购的具体做法。     

Finding a balance: companies, seafarers and family life

Separation from partner and family has been found to be one of the most significant causes of stress for seafarers, with separation from the family one of the most important 'stress' factors influencing a decision to reduce planned sea service. Drawing on in-depth interviews with seafarers' partners in the UK, China and India, this paper focuses on the impact of seafaring on family life, with particular attention given to the effects of differing conditions of service and the range of company support available to seafarers and their partners. The paper concludes that the negative consequences of seafaring can be minimized by such policies as shorter trips, continuous employment (rather than employment by voyage) and opportunities for partners and families to sail. Whilst these measures may have financial costs, these can be off-set by improved retention of seafarers and the avoidance of stress-related illnesses. Indeed, at a time when there is a projected shortfall of well-trained seafarers, such steps may be sound company policy     

The choice of speed and clearance for RAS on 3D method

In this paper, a 3D source distribution technique is used to calculate the coupled motions between two ships which advance in the wave with the same speed. The numerical results of coupled motions for a frigate and a supply ship have a good agreement with the experimental results. Based on the 3D coupled motions of two ships, a spectral analysis is employed to clearly observe the effect of speed, clearance and wave heading on the significant relative motion amplitude (SRMA) of two ships.The method presented in this paper will be helpful to select suitable clearance, speed and wave heading for underway replenishment at sea(RAS).     

STUDY OF T－LYMPHOCYTE SUBSETS AND INTERLEUKIN－2 AND INTERLEUKIN－2 RECEPTOR OF RESPIRATORY SYNCYTIAL VIRUS PNEUMONIA

ＳＴＵＤＹＯＦＴ－ＬＹＭＰＨＯＣＹＴＥＳＵＢＳＥＴＳＡＮＤＩＮＴＥＲＬＥＵＫＩＮ－２ＡＮＤＩＮＴＥＲＬＥＵＫＩＮ－２ＲＥＣＥＰＴＯＲＯＦＲＥＳＰＩＲＡＴＯＲＹＳＹＮＣＹＴＩＡＬＶＩＲＵＳＰＮＥＵＭＯＮＩＡＷｅｉＪｕｎ；Ｚｈａｏｐｅｉｘｉａ；ＹａｎｇＳ...     

偏振主轴色散——一种度量偏振模色散的新方法

首次在保持线偏振不变的前提下，将偏振主轴的概念推广到任意光波导，证明了损耗与偏振无关的任意折射率分布的单模光纤中，存在两正交的偏振主轴、首次引出了偏振主轴色散的概念，它可以作一种新的表征偏振模色散的度量方法，给出了偏振主轴色散的公式及它与长度的关系。偏振主轴色散与偏振主态色散相比，具有易于分解与合成、不需求偏振态对频率的导数、较接近实测结果等优点。     

铁路运输企业物流服务发展方向

1铁路运输服务的3种物流业务类型 (1)传统物流型 这里所说的传统物流型的铁路运输服务是指铁路运输服务没有体现多式联运技术和现代物流技术的应用与发展,服务方式局限在传统的单一铁路运输方式上.其工作流程一般可以简单表示为:发货人(发货人的代理人)--铁路运输企业--收货人(收货人的代理人).在这一服务过程中,铁路运输企业是运输承运人和运输任务的实际承担者.     

我国部分桥梁大位移量伸缩装置的初步调查

对我国9座特大型桥梁所使用的大位移量伸缩装置产品进行了基本调查和测量,通过统计分析对进口和国产大位移量伸缩装置产品的实际运营状况有所了解,供业内人士参考。