浅谈行政事业单位固定资产管理标准化

本文在分析行政事业单位固定资产管理标准化方面所存在的问题的基础上,提出了构建行政事业单位固定资产标准化管理体系的思路和方法。     

Using Risk-Informed Asset Management for Feedwater System Preventative Maintenance Optimization

The initial development of a South Texas Project Nuclear Operating Company process for supporting preventative maintenance optimization by applying the Balance-Of-Plant model and Risk-Informed Asset Management alpha-level software applications is presented. Preventative maintenance activities are evaluated in the South Texas Project Risk- Informed Asset Management software while the plant maintains or improves upon high levels of nuclear safety. In the Balance-Of-Plant availability application, the level of detail in the feedwater system is enhanced to support plant decision-making at the component failure mode and human error mode level of indenture by elaborating on the current model at the super-component level of indenture. The enhanced model and modeling techniques are presented. Results of case studies in feedwater system preventative maintenance optimization using plant-specific data are also presented.     

装备一体化精益保障架构及发展趋势

介绍了装备一体化精益保障的定义和出现背景,以及当前美军保障概况和装备保障未来发展趋势.为打造出一个有中国特色的装备一体化精益保障之路,结合我国国情,分析了精益保障所需的关键技术,构建出我国装备一体化精益保障框架.最后,展望我国装备一体化精益保障的未来发展策略.     

Reproducibility of Turnover Rates in Heterogeneous Metal Catalysis: Compilation of Data and Guidelines for Data Analysis

The combination of turnover rate measurements and surface science techniques allows a firm quantification of rates in heterogeneous catalysis by metals. There are many examples of reactions where the turnover rates from different laboratories are the same. However, there are still problems, as in the isomerization and hydrogenolysis of hydrocarbons over noble metals, where the turnovers rates from different laboratories differ by many orders of magnitude. An explanation for this discrepancy is discussed. Guidelines for experimental work in heterogeneous catalysis that will help to minimize this wide scatter of turnover rates in the future are presented.

     

大型分层水库翻库特性及溶解氧响应研究

翻库对分层水库的水生态环境具有重要意义。通过在大型深水水库潘家口水库的原位监测结合垂向二维水动力-水质-水生态模型对翻库特性及溶解氧(DO)响应进行研究,分别对2018和2020年的水环境过程进行模拟。结果显示,水温分层导致了DO垂向分层,表层DO与气温相关性强,底层DO在分层后持续下降至0,秋季翻转是底层复氧的主要途径。2018年平均运行水位较2020年高14.2 m,表层温水层最大厚度2018年比2020年增加了近10 m,水库翻库从库尾逐渐向坝前推进。在库尾到坝前的距离约30 km的水域,2018年翻库的历经时间比2020年缩短40 d,坝前DO的垂向均匀时间滞后于水温7~10 d。水库水位较低时,翻库产生的表层水体DO下降幅度更大,降幅为3~4 mg/L。分别对水库不同断面可用势能指数(APE)对分层稳定性的过程进行分析,水库在不同年份和不同位置断面的翻库日期与夏季混合循环期的平均APE指数大小具有较好的相关关系。研究为探求大型深水分层水库水环境演变规律,科学合理进行调度提供理论基础。     

浅论固定资产计提减值准备

从固定资产计提减值准备的必要性出发，对固定资产的减值问题作出一定探讨。     

土壤氮矿化-固持周转(MIT)研究进展

土壤氮矿化-固持周转(MIT)过程与土壤供氮力及氮素损失间存在密切关系。本文概述了近年来MIT过程的研究方法及其相应的模型;对土壤温度、土壤水分、土壤理化性质、植物生长状况以及有机、无机肥的施用等影响MIT过程的主要因素进行了较详尽地阐述,并展望了今后主要的研究方向。     

基于构件/构架复用技术的仿真系统软件研究

针对传统仿真系统软件开发的不足,将复用技术应用于仿真领域,提出基于构件/构架复用技术的仿真系统软件模型及设计方法,并在STAR-90仿真支撑系统的基础上,实现了复用仿真系统软件的开发。