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针对当前企业业务系统数据互通共享困难、报表制作人工投入过大的问题，提出了基于智能信息流的智能报表分析系统。基于BI商业智能信息流的报表数据整合过程，将数据转化为有序信息以供分享。结合XML技术，实现各类元数据标准化管理。定义模板RDL文件，构建报表迁移总体模型，并将报表信息加载到XML文件中，完成报表格式迁移。通过余弦相似度评估不同度量间的相似性，完成统计决策模式识别。通过水电厂报表模型分析表明，系统在保障数据处理分析准确性的前提下，能智能化完成报表开发和决策分析。 相似文献
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对于T接线路的常规距离、零序由于整定困难,不易配合,而三端口光纤差动保护以其无可比拟的可靠性、选择性广泛应用于T接线路的保护。该文对三端口差动保护的维护及调试做了重点阐述。 相似文献
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随着智能电网建设的逐步推进,智能变电站的数量也随之增多,智能变电站最大的特点在于站内的信息传输介质为光纤传输,使用了大量的光缆。1现状调查以1座220kV智能变电站为例,站内的光纤插头数量多达3000个,数量巨大。光纤插拔工序所涉及的站内组网、光衰测试、断链测试等是调试过程中不可避免的试验。ST插口光纤是智能站内使用频率最高的光纤,其主要分布在交换机、装置背板及光纤配线架(ODF)中,布局紧密,空间狭小,部分厂家为了提高交换机光纤盘线工艺水平,装置屏柜设计时在交换机的光口后方增加横栏,这些情况使光纤插拔更加困难。 相似文献
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电瓶车是人们日常出行的重要工具之一,它具有体型较小、操作简单、低碳环保等优点,但电瓶车不能遮风挡雨,为了弥补这一缺陷,市场上出现了很多种电瓶车雨棚,但大都组装拆卸比较麻烦,也不够智能化,不能满足人们智能化需求。基于此,笔者设计了一款电瓶车晴雨天智能雨棚,详细说明了该电瓶车智能雨棚的产品组成、产品结构及使用方法。 相似文献
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随着智能剩余电流动作保护器(以下简称智能保护器)的推广应用,国网浙江电力在应用中先后遇到了多起智能保护器受损情况,然而通过分析智能保护器受损非都是由于保护器自身缺陷(如局部设计、元器件配置欠合理,元器件质量不稳定等)或安装不当、外部影响等因素造成的。通过对一起智能保护器受损的典型案例进行分析,提出了中性点不接地10 kV电网发生单相接地故障时,产生的弧光接地过电压也是导致智能保护器受损的重要因素,并阐明了事故发生的机理,同时提出了相关建议。 相似文献
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为解决智能母猪饲喂系统群养饲喂站与后台饲喂管理系统之间的数据同步问题,基于ARM Cortex-A9嵌入式平台、TCP/socket通信技术和数据库技术,提出一种智能母猪饲喂系统的高效可靠数据通信协议。设计通信协议的帧格式、大文件序列化传输机制、处理通信异常的心跳包机制和CRC校验算法。试验结果表明:该通信协议可以实现智能群养母猪饲喂站与后台饲喂管理系统的双向稳定通信;CSV传输大文件的平均提速达68%以上;设计的心跳包与socket重连机制可以有效处理通信异常,客户端重连socket响应时间平均相对误差不超过5.91%;CRC校验算法对随机单比特错误和双比特错误的误码检出率100%。该研究为实现群养母猪的个体精细饲喂提供支持。 相似文献
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《Journal of Agricultural Engineering Research》1998,69(3):249-254
A model to represent the discolouration of dried powder of carrots as a function of temperature was developed. Two types of carrots, Asian and European, containing large amount of lycopene and β-carotene, respectively, were tested. The dried powder was stored under an atmosphere with O2and at three different temperatures, 5,20 and 35°C. The surface colour of the powder was monitored during storage by a Hunter colour ratioa/b. In the proposed model, the rate of oxidation was assumed to be represented by the product of the fraction of concentration of oxidized pigment at arbitrary time and a specific rate of oxidation of pigment. The rate parameters in the proposed model were calculated by fitting the experimental data with smooth curves by trial and error at the end of the induction period but before discolouration took place. The frequency constant and activation energy, expressing the temperature dependence of the rate parameters, were expressed by the Arrhenius relation. The simulation results of a Hunter colour ratioa/bof dried powder at 25°C showed good agreement with the experimental data, suggesting that the proposed model was effective for the prediction of discolouration of dried powder of both types of carrot. The use of the induction period in the manner described may enable the shelf life of dried powder to be predicted. 相似文献
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感官检验棉花的品级,这是农村常见的一种检测手段.它的一个主要特点就是存在不确定性.这是由于检验员的品级检验水平存在一定的差异,其中有很多因素制约着检验的结果.文章对影响感官检验结果的因素进行了系统的分析. 相似文献
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从灾害经济学的角度探讨了城镇供水优化调度的必要性和可能性，认为在缺水不可避免的情况下，对供水进行优化调度可以减小缺水带来的损失，产生较好的减灾效益，特别是可以大大减小严重干旱的灾害效应。并根据水资源的特性，提出了缺水损失的计算模式以及优化调度的原则和方法。 相似文献
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The fractional outflow rate of water from the rumen, measured as the rate of disappearance of the chromium complex of ethylenediamine tetra-acetic acid, was related to a number of dietary factors. A multiple regression equation was derived which expressed fractional outflow rate as a function of the intakes of dry matter, ash, acid-detergent fibre and crude protein.The data analysed consisted of 243 observations for sheep on 59 diets, including forage, concentrate and mixed diets. The ranges covered by the data were: fractional outflow rate 0.7–3.6 day?1; dry matter intake 560–1400g/day; ash 4–30%, acid-detergent fibre 7–41%, crude protein 5–26 % of dry matter; there were no observations for sheep of less than 34 kg liveweight.The equation accounted for 56·3 % of the total variance. Between-sheep variance could not be calculated for the whole of the data but was undoubtedly substantial since, for a sixth of the data, it was known to account for 38 % of the total variance. 相似文献