为实现荔枝园环境的实时远程监控和精准管理,设计基于农业物联网的荔枝园信息获取与智能灌溉专家决策系统,该系统通过信息采集终端模块实时采集荔枝园的土壤含水率、空气温湿度、光照强度、风速和降雨量等环境信息,通过无线传感网将数...为实现荔枝园环境的实时远程监控和精准管理,设计基于农业物联网的荔枝园信息获取与智能灌溉专家决策系统,该系统通过信息采集终端模块实时采集荔枝园的土壤含水率、空气温湿度、光照强度、风速和降雨量等环境信息,通过无线传感网将数据包发送到网关上,网关通过通用无线分组网(general packet radio service,GPRS)将处理后的数据包传输到云服务器,专家系统根据采集到的环境数据,结合专家知识,建立多个决策数学模型,实现计算作物需水量、预报灌溉时间、灌溉最佳定量决策、根据灌溉制度决策等决策功能,将决策结果反馈到控制终端模块进行智能监控。经试验,对比系统多参数决策和一般的单参数决策得出的结论,多参数决策的准确性更高;灌溉区域的土壤含水率平均值为17.4%,满足荔枝树生长所需的土壤含水率条件,说明系统的灌溉决策具有比较强的实时性。且系统预测能达到75%的准确率,说明系统的预测实时性比较好。该系统实现了荔枝园的环境信息获取与智能灌溉,能指导用户更好地管理荔枝园。展开更多
To evaluate the effectiveness of weapon systems, the advantages and disadvantages of grey relational analysis and TOPSIS for multiattribute decision-making is pointed out, and an effectiveness evaluation model of weap...To evaluate the effectiveness of weapon systems, the advantages and disadvantages of grey relational analysis and TOPSIS for multiattribute decision-making is pointed out, and an effectiveness evaluation model of weapon systems by combining grey relational analysis and TOPSIS is proposed. The model aggregates the grey relational grade and the distance to a new integrated closeness and reflects not only the trend but also the situation of the alternative. The example illuminates that the model is effective for the effectiveness evaluation of weapon systems.展开更多
文摘为实现荔枝园环境的实时远程监控和精准管理,设计基于农业物联网的荔枝园信息获取与智能灌溉专家决策系统,该系统通过信息采集终端模块实时采集荔枝园的土壤含水率、空气温湿度、光照强度、风速和降雨量等环境信息,通过无线传感网将数据包发送到网关上,网关通过通用无线分组网(general packet radio service,GPRS)将处理后的数据包传输到云服务器,专家系统根据采集到的环境数据,结合专家知识,建立多个决策数学模型,实现计算作物需水量、预报灌溉时间、灌溉最佳定量决策、根据灌溉制度决策等决策功能,将决策结果反馈到控制终端模块进行智能监控。经试验,对比系统多参数决策和一般的单参数决策得出的结论,多参数决策的准确性更高;灌溉区域的土壤含水率平均值为17.4%,满足荔枝树生长所需的土壤含水率条件,说明系统的灌溉决策具有比较强的实时性。且系统预测能达到75%的准确率,说明系统的预测实时性比较好。该系统实现了荔枝园的环境信息获取与智能灌溉,能指导用户更好地管理荔枝园。
文摘To evaluate the effectiveness of weapon systems, the advantages and disadvantages of grey relational analysis and TOPSIS for multiattribute decision-making is pointed out, and an effectiveness evaluation model of weapon systems by combining grey relational analysis and TOPSIS is proposed. The model aggregates the grey relational grade and the distance to a new integrated closeness and reflects not only the trend but also the situation of the alternative. The example illuminates that the model is effective for the effectiveness evaluation of weapon systems.
