海域使用统计浅谈

海域使用统计工作在全国沿海各地刚刚开展，实践中遇到一些问题。本文在借鉴土地统计工作的成熟经验基础E。结合统计学的基本原理和方法，针对海域使用统计的特点和管理需要。进行了初步探讨和研究，就海域使用统计的工作内容、调查、整理以及分析方法和步骤进行了阐述。     

Cost-Benefit Assessment of Inspection and Repair Planning for Ship Structures Considering Corrosion Model Uncertainty

Owing to high costs and unnecessary inspections necessitated by the traditional inspection planning for ship structures, the risk-based inspection and repair planning should be investigated for the most cost-effective inspection. This paper aims to propose a cost-benefit assessment model of risk-based inspection and repair planning for ship structures subjected to corrosion deterioration. Then, the benefit-cost ratio is taken to be an index for the selection of the optimal inspection and repair strategy. The planning problem is formulated as an optimization problem where the benefit-cost ratio for the expected lifetime is maximized with a constraint on the minimum acceptalbe reliability index. To account for the effect of corrosion model uncertainty on the cost-benefit assessment, two corrosion models, namgly, Paik＇ s model and Guedes Soares＇ model, are adopted for analysis. A numerical example is presented to illustrate the proposed method. Sensitivity studies are also providet. The results indicate that the proposed method of risk-based cost-benefit analysis can effectively integrate the economy with reliability of the inspection and repair planning. A balance can be achieved between the risk cost and total expected inspection and repair costs with the proposed method, which is very. effective in selecting the optimal inspection and repair strategy. It is pointed out that the corrosion model uncertainty and parametric uncertaintg have a significant impact on the cost-benefit assessment of inspection and repair planning.     

南山城地震站VP型宽频带倾斜仪故障分析

对南山城地震站VP型宽频带倾斜仪的常见故障进行分析,提出故障的解决方法,为工作人员判断及解决问题提供思路,为提高观测资料连续率提供保障。     

凹凸棒石对水中亚甲基蓝的吸附动力学研究

研究了凹凸棒石对水中亚甲基蓝的吸附动力学,在初始浓度为120~210mg/L、转速为100~200rpm、以及温度为298~328K的范围内,凹凸棒石对亚甲基蓝的吸附动力学数据均符合准二级速率方程。结果表明,凹凸棒石对亚甲基蓝的吸附仅发生在外表面,吸附表观活化能为13.92kJ/mol,说明此吸附并不是由单一的化学吸附为速率控制步骤,是由化学吸附和液膜扩散共同控制的吸附过程。凹凸棒石对水中亚甲基蓝的吸附动力学研究@彭书传$合肥工业大学资源与环境工程学院!230009 @王诗生$合肥工业大学资源与环境工程学院!230009 @陈天虎$合肥工业大学资源与环境…     

新一代天气雷达维护维修软件的设计

介绍了滨州新一代天气雷达维护、维修软件的运行环境和结构,着重介绍了该软件雷达档案、业务文件、日维护、周维护、月维护、年维护、维修记录、查询等模块的主要功能和特点,不但可以方便录入雷达档案、上级业务文件、日常维护与维修的工作记录,遇到故障时还可以在软件里查询相应的处理方法,从而可以大大提高维修效率,缩短维修所用的时间,提高雷达的可用性指标。     

一次虹吸雨量计故障的排除

在观测工作中 ,曾遇到过一次十分棘手的虹吸雨量计故障问题 :自记笔尖始终停留在自记纸 0 .2mm线处 ,无论如何都调整不到 0点 ,使笔者百思不得其解。在处理这次故障问题中 ,已将自记笔的根部调到最低 ,并且虹吸管与浮子室侧管连接处紧密衔接 ,不漏水 ,不漏气 ,虹吸管内壁和浮子室内也都很清洁 ,浮子直杆与浮子室顶盖上的直柱清洁无锈蚀且两者保持平行。自记笔尖移动灵活 ,浮子顶端的直杆移动自由 ,自记笔右端的导轮和导向卡口顺着支柱滑动灵活。总之 ,能出问题的有疑点部件均作了认真考虑和检查 ,都正常和符合要求。问题到底出在哪里呢 ?只…     

收报填图系统硬件常见故障维修

通过几个实例，对自动收报填图系统的常见硬件故障，进行了分析并介绍了维修技巧。阐述了条件差的台站，对于某些故障，应该寻求应急维修的必要性，从而在机务工作中做到多快好省。     

长江上游泥石流危险度区划的步骤

本区划分为四个步骤：１．单指标分级、分区，并编制成图；２．复合指标分级、分区，并编图；３．专项指标分级、分区，并作图；４．泥石流危险度指标分级、分区，并作成“长江上游泥石流危险度分区图”（见刊前）．