产品工艺数据库管理系统的设计

本文论述了产品数据库管理系统的基本组成、软件结构及关键技术 ,该系统以 Fox Pro2 .5为开发平台 ,具有数据输入、数据输出、报表、查询、修改等功能 ,在实际运用中 ,显著地提高了工作效率 ,具有广阔的应用前景。     

榨油工艺的自动检测与控制方法

介绍一种榨油工艺的自动控制仪表。在加工过程中,它可以自动调节给水量和蒸炒温度这两个重要参数,使棉籽饼内的残油率有明显降低,同时节能效果也很显著。     

航空发动机磨损在线监测的能谱数据处理方法研究

对用于航空发动机磨损在线监测的能谱数据处理方法进行了研究。介绍了基于同位素Ｘ射线荧光法的滑油磨损在线监测系统的组成及工作原理,通过对所获得能谱数据进行平滑、剥谱、寻峰、峰净面积计算、浓度插值计算等处理,就可以实现杂质浓度的自动检测。文中担子一种函数拟合寻峰方法,实现结果表明,这种方法具有算法简单、运算速度快等优点,特别适合于在线监测的能谱数据处理。     

一种单线读写数据安全智能卡

介绍一种安全性好的单线读写数据智能卡,给出了单线读写接口电路和写程序。     

数据中心规划设计的最佳实践

本文探讨了数据中心建设中规划设计阶段所涉及的整体规划、绿色节能、安全冗余、工程模式四个方面的最佳实践,为数据中心规划设计的实践准则和方法措施提供参考。并倡导总结与采用最佳实践,以提高业界的数据中心建设水平。     

Assessing nutrient flows in septic tanks by eliciting expert judgement: a promising method in the context of developing countries

Simple models based on the physical and biochemical processes occurring in septic tanks, pit and urine diversion latrines were developed to determine the nutrient flows in these systems. Nitrogen and phosphorus separation in different output materials from these on-site sanitation installations were thus determined. Moreover, nutrient separation in septic tanks was also assessed through literature values and by eliciting expert judgement. Use of formal expert elicitation technique proved to be effective, particularly in the context of developing countries where data is often scarce but expert judgement readily available. In Vietnam, only 5-14% and 11-27% of the nitrogen and phosphorus input, respectively, are removed from septic tanks with the faecal sludge. The remaining fraction leaves the tank via the liquid effluent. Unlike septic tanks, urine diversion latrines allow to immobilize most of the nutrients either in form of stored urine or dehydrated faecal matter. These latrines thus contribute to reducing the nutrient load in the environment and lowering consumption of energy and non-renewable resources for fertiliser production.     

The Future of Information Modelling and the End of Theory: Less is Limited,More is Different

The computational design strategist Cynthia Ottchen , who was previously Head of Research and Innovation at OMA, offers insights into the future of building information modelling (BIM). Now in the Petabyte Age of the data deluge, she argues that in our adoption of BIM we have to surpass mere data collection and technical optimisation and open up new ways of thinking with the creative use of ‘soft data’. Copyright © 2009 John Wiley & Sons, Ltd.     

道路纵横断面测量数据的半自动采集方法

道路纵横断面测量是道路工程测量的重要组成部分,传统的测量方法不仅效率低下,而且无法保证产品质量。本文介绍了在MicroStation图形软件平台下,利用VBA语言编程实现道路纵横断面测量数据的半自动采集与图形绘制的思路以及作业流程,给出了工程范例,最后指出了软件的改进思路。     

绿色建筑设计中对具有数据中心的两栋办公楼的能量建模分析

EnergyPlus是为上海研发中心的两栋办公楼开发的能量模拟模型,用来评估其采用环保设计之后节能效果,并与基准建筑相对比。作为国际IT公司的研发中心,这两栋楼中具有数据中心,使其不同于一般办公楼。数据中心的IT设备具有高能耗特点,并且需要24h不间断的空调运行。为了达到节能目的,设计时考虑了多种节能措施,如外墙采用高性能材料、轻型建筑系统和HVAC系统。通过能量模型,将提出的设计方式与ASHRAE90·1-2004 compliant budget模型进行对比,以强调与"应用标准"相比之下的节能效果,同时显示了潜在的LEED(tm)Credit EA1节能优化性能。同时,将其与中国规范对比,计算中国公共建筑节能标准中的节能量。整体房屋能量模拟结果显示:这种设计方式下的年均节能,按中国规范能达到大概27%,按ASHRAE建筑预算可节省21%,由于节能优化,可达到LEED信用4级。     

Guidelines for the required time resolution of meteorological input data for wind-driven rain calculations on buildings

An important question in wind-driven rain (WDR) calculations on buildings, either with semi-empirical formulae or with Computational Fluid Dynamics (CFD), concerns the required time resolution of the meteorological input data: wind speed, wind direction and horizontal rainfall intensity. Earlier work has indicated that the use of 10 min input data can provide accurate results, while the use of arithmetically averaged hourly data can yield significant underestimations in the calculated WDR amounts. This paper builds further on this earlier work by providing a detailed investigation of the parameters that determine the required time resolution for WDR calculations on building facades: (1) the averaging technique, (2) the building geometry and the position at the building facade and (3) the type of the rain event. It is shown that all three parameters can have a large influence on the required time resolution. Depending on these parameters, hourly or even daily wind and rain input data could provide accurate results, while in other situations they can lead to very large errors. Finally, guidelines for the required time resolution as a function of the influencing parameters are provided.