和谐交通的伦理构建:系统、结构、层次

构建"和谐交通"是系统性的价值目标,需要以和谐伦理为导向,从宏观上审视现代交通关系的结构及其特征,研究交通主体之间、交通客体之间、交通主客体之间的基本关系及其状态,通过一系列调整优化,使之不断地从冲突走向和谐。     

船舶火灾报警系统的检验及维护

本文简要介绍了船舶火灾报警系统的功能及其组成，阐述了船舶火灾报警系统审图的要点，并提出了船舶火灾报警系统现场检验的方法，最后说明了船舶火灾报警系统日常维护保养的要求。     

和谐HX_D1型大功率交流电力机车电传动系统

详细介绍HXD1型大功率交流电力机车主电路和辅助电路的结构组成、工作原理、技术基础、冗余设计理念以及故障保护机理与实施情况。     

城轨首都国际机场线CBTC信号系统

结合工程项目实际，对首都国际机场线采用的CBTC（基于通信的列车控制）信号系统进行介绍。     

Pb and Pu in the Northeast Water Polynya, Greenland: particle dynamics and sediment mixing rates

Distributions of the radionuclides ²¹⁰Pb and ^239,240Pu in sediment cores from the Northeast Water Polynya, Greenland, showed that these nuclides reached depths of 5–15 cm by particle mixing and sediment accumulation. End-member average values of the particle mixing coefficient and sediment accumulation rate were 0.13 cm² y⁻¹ and 0.06 cm y⁻¹, obtained from the ²¹⁰Pb profiles by assuming that each process is dominant relative to the other. Both ²¹⁰Pb and ^239,240Pu were measured on four cores; using the Pu data to constrain mixing rates produced corrected sediment accumulation rates that were 20–80% of the values calculated by neglecting mixing. Organic carbon burial in the polynya sediments was ≤0.4 mmol m⁻² d⁻¹, based on measured POC values at depth in the sediments and sediment accumulation rates corrected for mixing. This value is about 1% of the independently measured POC flux leaving the euphotic zone and compares with benthic carbon remineralization rates of 7% calculated by others from O₂ uptake in the sediments.The inventories of excess ²¹⁰Pb in the sediments ranged from 6 to 28 dpm cm⁻². Relative to the atmospheric input of ²¹⁰Pb and in situ production from decay of ²²⁶Ra, approximately 5 dpm cm⁻² of ²¹⁰Pb was being removed from the water column. The difference between the removal from the water column and sediment inventories suggests a net import of ²¹⁰Pb to the polynya. This may occur by input of dissolved ²¹⁰Pb from offshore waters or by input of ²¹⁰Pb carried by sea ice. Particulate matter in land-derived fast ice adjacent to the polynya contained 330 ± 14 dpm of excess ²¹⁰Pb g⁻¹. If particles transported in sea ice are comparable to those extracted from fast ice, then sea ice transport into the polynya followed by melting may be an important source of excess ²¹⁰Pb to the area. Fast ice also may contribute ²¹⁰Pb if portions break off and melt within the polynya, as occurred in 1993.     

电控静液压传动推耙机的结构特点和维护要点

以卡特D5G电控静液压推耙机为例,介绍静液压传动技术在履带式工程机械行走驱动系统中的应用,阐述系统的结构特点及维护要点.     

长江干线航道条件与船舶定线制问题分析与研究

通过分析长江干线已实施船舶定线制的特点,分析船舶定线制的一般形式与通航条件,提出了长江干线船舶定线制的航道尺度计算方法和水流条件指标,并结合航道条件,提出了长江干线其他未实施船舶定线制河段的定线制形式,为进一步完善内河船舶定线制提供了一种方法和思路。     

Windows CE流接口驱动程序设计方法

开发嵌入式操作系统的设备驱动程序是应用嵌入式技术的重要基础。流接口驱动程序是Windows CE基本的驱动程序，是很多驱动程序的基础。分析Windows CE流接口驱动程序的基本结构，探讨流接口驱动程序的功能定义，认为流接口驱动程序应当能为应用程序提供查询输入和事件输入等两种输入方式，给出中断程序设计、I/O缓冲区设计的注意事项，总结一般的流接口驱动程序设计开发方法。     

舰船回转过程中内、外侧螺旋桨负荷变化规律的新现象

在许多教科书中,螺旋桨推进双桨船在回转过程中内、外螺旋桨负荷变化规律均有如下叙述:回转过程中内侧螺旋桨负荷远大于外侧螺旋桨负荷.这个结论也被某些实船试验结果所证实.但新近完成的某双桨船的回转试验的多个实测结果表明:外侧螺旋桨负荷远大于内侧螺旋桨负荷.在上世纪90年代国内有人已发现过这一新现象,但当时无人记录和分析以进行研究.本文报告和分析了这一新现象.文章首先简要回顾了以往教科书和某些实船试航回转过程中内、外桨负荷变化规律;然后介绍了某新船回转试验的实测结果,论述了实测结果的可信性.本文着重探讨了导致这一新现象的主要原因,如船体形状、船的运动、内外螺旋桨的运动、桨与船的相互作用和桨与桨的相互作用等.