水泵水轮机的数值模拟及其应用

采用足够小的直线段拟合机组全特性曲线平直部分，采用二次多项式拟合机组全特性曲线弯曲部分，推导了有关方程，并对模拟的方程进行了处理，编制了较通用的计算机程序，利用该计算机程序对我国蒲石河抽水蓄能电站进行了计算分析，计算结果表明：该计算机程序计算速度较快、计算准确度较高，提出的水泵水轮机的数值模拟方法具有实用价值．     

10000m^3内浮顶油罐双浮动吸油装置设计

介绍了某油库扩建工程中10 000 m3内浮顶油罐双DN500浮动吸油装置的结构设计,并对内浮顶罐浮动吸油装置的浮力进行了优化配置,此经验对我国内浮顶油罐浮动吸油装置的设计和使用具有一定的指导意义.     

响洪甸电站引水隧洞进口水下岩塞爆破施工

响洪甸抽水蓄能电站水下岩塞爆破施工要求高,技术新,难度大.由于施工准备充分,并进行了一系列材料及施工试验,工程进展顺利,排孔造孔、导洞药室开挖、药管与起爆体加工、装药与堵塞、网络施工、充水补气等工程施工质量符合设计要求,岩塞爆破准时成功起爆.     

Thermal characteristics of packed bed storage system

The thermal behaviour of a packed bed storage system charged with hot air is modelled using two partial differential equations representing the energy conservation in the air and solid phases constituting the bed. These two equations are coupled through the heat exchange process between the two phases. A fully implicit numerical scheme based on forward, upwind and central differencing for the time, first and second space derivatives, respectively, is used to solve the modelling equations. Marching technique is used for the air equation and a tri-diagonal matrix solver is employed to solve the solid equation. The solution yields the thermal structure of the bed, namely the air and solid temperature distribution inside the bed at any particular time, and the variation of total energy stored in the bed with time. The effect of bed length, solid diameter and void fraction on the thermal characteristics of the packed bed is studied. Further, the performance of the bed under variable inlet air temperature and mass flow rate is investigated.     

收尽铁路油槽车底油的措施

介绍了造成铁路油槽车底油收不尽的原因，一是节约意识差；二是设备设施陈旧或维护不够；三是操作不当。提出了增强节约意识，挖掘设备潜力，采用合理的吸油方法的对策。     

A Video Server cost/performance Estimator tool

The Video Server Estimator (VSE) is an analytical tool which allows a user to perform a cost/performance analysis of video servers with hierarchical storage. The underlying model comprises multiple systems, main memory, expanded storage, disks and a tape library. The main objective of the tool is to optimally allocate the video files to different storage media based on the system parameters and the video file request probability distribution. The cost and the size of the video server that can accommodate a customer profile are determined. Furthermore, the impact of design parameters on the cost and performance are examined through a parametric analysis.     

Phase-change thermal energy storage using spherical capsules: performance of a test plant

The aim of this paper is the study of an industrial process of energy storage usable for air conditioning or refrigeration, investigating a test plant which is a tank with a reduced size, filled with randomly dispersed commercial nodules, placed in a refrigeration loop. The nodules are spherical capsules in which phase change materials (PCM) are encapsulated. This test plant permits the study at length of the behaviour of the tank with, in particular, the charge mode taking into account the undercooling and the discharge mode. A simulation program that considers aspects of both the surrounding heat transfer fluid and the phase-change material packed inside the nodules is developed here in the cases of the charge and the discharge processes. The simulation results are then compared with experimental observations.     

Factors Affecting 1-Octen-3-ol in Mushrooms at Harvest and During Postharvest Storage

Harvesting experiments revealed that immature whole mushrooms with closed veils had higher 1-octen-3-0l levels than more mature whole mushrooms with open veils. The l-octen-3-01 content of the gills was higher in immature mushrooms with closed veils, gradually decreased with maturity as the veil opened, and finally increased after the gills were well exposed. Postharvest experiments demonstrated that storage temperature influenced the activity of lipoxygenase-hydroperoxide lyase, but no differences in 1-octen-3-01 content were observed. Enzyme activity as well as 1-octen-3-01 content decreased during storage. Addition of calcium chloride to irrigation water, employed to improve quality and shelf life of fresh mushrooms, increased the amount of l-octen-3-01 immediately after harvest.     

Monolithic Catalysts with Low Noble-Metal Content for Exhaust Purification of Small Gasoline Engines

A series of low noble-metal coment monolithic catalysts for exhaust purification of small gasoline engines was investigated, and it was found that the Pt/Rh-OSM/Al2O3 （where OSM was oxygen storage material） catalyst with Ce0.5Zr0.5-MnOx（3%MnOx） OSM held low light-off temperature for CO, HC, and NO; quite wide three-way window, and outstanding thermal stability. The catalyst could efficiently comrol exhaust emission of small gasoline engines.     

抽水蓄能电站施工控制网的设计与施测

本文通过对桐柏、宜兴、泰安等抽水蓄能电站施工控制网的技术设计、网形优化及施测方案等方面的论述,总结了在特殊困难地区采用LeicaTCA2003全站仪和ZeissDiNi12电子水准仪建立高精度的施工控制网的经验,并通过对施测成果的精度评定,对施测方案提出合理的建议。