目的在载人飞船飞行期间监控环境控制与生命保障系统(environment control and life support system,ECLSS)的工作状态,对故障进行诊断和决策支持。方法依据决策支持系统、神经网络和专家系统原理,设计出了环控生保决策支持系统(ECLSS D...目的在载人飞船飞行期间监控环境控制与生命保障系统(environment control and life support system,ECLSS)的工作状态,对故障进行诊断和决策支持。方法依据决策支持系统、神经网络和专家系统原理,设计出了环控生保决策支持系统(ECLSS Decision supporting system,EDSS)的基本结构,运用故障树分析方法进行故障划分,形成专家知识,并将神经网络与专家系统相结合进行自学习。结果在2人5天的“神舟”6号载人飞行试验中,软件系统得到了全面考核和验证,为试验任务的圆满成功提供了良好的技术支持和保障。结论所建立的决策支持系统能够准确、迅速地进行数据判读和故障诊断,数学模型设计正确,参数预测结果合理。展开更多
Increasing environmental awareness and stringent environmental regulations have motivated many companies to incorporate ecodesign into product development. To assist companies to address the challenge, this research p...Increasing environmental awareness and stringent environmental regulations have motivated many companies to incorporate ecodesign into product development. To assist companies to address the challenge, this research presents a design for environment （DfE） methodology to evaluate and improve derivative consumer electronic product development using a back-propagation neural network （BPNN） model and a technique for order preference by similarity to ideal solution （TOPSIS） method. Based on use of a BPNN, the life cycle assessment （LCA） models are developed to estimate quantities of hazardous chemical substances and energy consumption for a derivative consumer electronic product throughout the product life cycle. A performance evaluation and improvement model for DfE is then devised based on the TOPSIS method to analyze the ecodesign performance and provide concrete improvement strategies. With the aforementioned analysis of environmental performance, an enterprise can profoundly understand and significantly enhance the relative DfE performance of a new product compared to the similar competitive products. Finally, we apply an optical mouse development project as a case to elaborate and demonstrate the effectiveness of the proposed methodology. These analytical results can let us understand the DfE performance ranking and acquire the maximum reduced quantity of each DfE criterion for each module of a new product. Meanwhile, to enhance the green competitiveness of the new product, we recommend that the engineers should decrease the area of the circuit board of the new product. In addition, the material of the USB cable for the new product should be switched from the PVC material to the PE material.展开更多
文摘目的在载人飞船飞行期间监控环境控制与生命保障系统(environment control and life support system,ECLSS)的工作状态,对故障进行诊断和决策支持。方法依据决策支持系统、神经网络和专家系统原理,设计出了环控生保决策支持系统(ECLSS Decision supporting system,EDSS)的基本结构,运用故障树分析方法进行故障划分,形成专家知识,并将神经网络与专家系统相结合进行自学习。结果在2人5天的“神舟”6号载人飞行试验中,软件系统得到了全面考核和验证,为试验任务的圆满成功提供了良好的技术支持和保障。结论所建立的决策支持系统能够准确、迅速地进行数据判读和故障诊断,数学模型设计正确,参数预测结果合理。
基金supported by the National Science Council under project No.NSC 99-222-E-251-001
文摘Increasing environmental awareness and stringent environmental regulations have motivated many companies to incorporate ecodesign into product development. To assist companies to address the challenge, this research presents a design for environment （DfE） methodology to evaluate and improve derivative consumer electronic product development using a back-propagation neural network （BPNN） model and a technique for order preference by similarity to ideal solution （TOPSIS） method. Based on use of a BPNN, the life cycle assessment （LCA） models are developed to estimate quantities of hazardous chemical substances and energy consumption for a derivative consumer electronic product throughout the product life cycle. A performance evaluation and improvement model for DfE is then devised based on the TOPSIS method to analyze the ecodesign performance and provide concrete improvement strategies. With the aforementioned analysis of environmental performance, an enterprise can profoundly understand and significantly enhance the relative DfE performance of a new product compared to the similar competitive products. Finally, we apply an optical mouse development project as a case to elaborate and demonstrate the effectiveness of the proposed methodology. These analytical results can let us understand the DfE performance ranking and acquire the maximum reduced quantity of each DfE criterion for each module of a new product. Meanwhile, to enhance the green competitiveness of the new product, we recommend that the engineers should decrease the area of the circuit board of the new product. In addition, the material of the USB cable for the new product should be switched from the PVC material to the PE material.
