基于模糊评价方法的需求文档质量评价研究

为给评价者提供一种定量的评价需求文档质量的方法,给出了需求文档的重要质量属性,提出了将模糊评价方法运用于需求文档质量评价,从而降低结论的主观性,提高结论的可信度和说服力。     

模糊自适应PID控制器及Simulink仿真实现

常规PID控制对非线性、时变系统的控制效果不是很理想,文章提出将模糊技术与PID控制相结合的控制方式,即模糊自适应PID控制器,并结合实例在Simulink环境中实现了该模糊自适应PID控制器的仿真。仿真结果表明,该模糊自适应PID控制具有控制灵活、响应快和适应性能强的优点。     

基于模糊信息源的船舶航线补充评价方法

考虑到船舶航线评价不仅关系到船舶航行安全,也与船舶的运营效益密切相关,提出基于模糊信息源的船舶航线补充评价方法,充分利用信息的价值修正指标权重,使评价的结果更有参考价值。     

模糊多目标决策中逆序问题的解决

文章分析模糊多目标决策中循环排序和逆序现象产生的原因,并给出了相应的解决途径。     

非理想气泡振动混沌特性应用

通过计算非理想气泡振动模型的Lyapunov指数谱,绘出气泡振动模型的关联维与嵌入维关系图,得到气泡振动的关联维数,验证了非理想气泡振动的混沌特性。在此基础上,计算了气泡振动由倍周期分叉通向混沌过程中所对应的模糊函数,并绘制相应的模糊函数图形。结果表明,混沌响应信号作为主动探测信号将具有较强的分辨力,该结论为水下目标混沌信号检测奠定了理论基础。     

惯导辅助的GPS船舶测姿系统关键技术研究

针对现有的多种周跳检测与修复、整周模糊度求解算法以及单纯GPS测姿和单纯惯导测姿的优缺点,提出了一种适合船舶姿态测定的方案。该方案结合平差原理和多普勒信息处理周跳,并对LAMBDA算法进行了改进和优化,采用多种约束信息来剔除不正确模糊度组合,最后采用基于Kalman模型进行陀螺与GPS航向角数据融合。实验结果表明,在0.497m基线条件下,航向角精度优于0.3°,俯仰角(横滚角)测量精度优于0.5°。     

船舶柴油发电机转速控制系统设计

电力推进船舶通常采用柴油发电机组作为电力来源,通过电力驱动系统的电机。为了提高电力推进船舶的能源利用率,实现电力推进船舶的经济效益,针对船舶柴油机组的负载特性等进行柴油发电机的转速控制。本文首先建立柴油发电机的数学模型,结合柴发调速系统和PID控制技术,设计针对船舶柴油发电机的转速控制系统,并结合Matlab-Simulink平台进行了转速控制系统的仿真验证。     

The Evaluation and Selection of Outsourcing Suppliers in Mass Customization （MC）

Many MC companies find it necessary to cooperate with a large number of outsourcing suppliers to provide MC products according to customers＇ diversified orders. To this end, how to select competitve suppliers for the outsourcing manufacturing of non-core processes is the key to establish strong supply chain ally of MC company as well as make the company more efficient in its core manufacturing processes. A procedure of selecting outsourcing suppliers was presented to identify and find competitive suppliers. The continuous improvement of this procedure was proposed to ensure the optimal supply chain of MC company in the long run. Besides, a multi-criteria evaluation model in the procedure was set up according to MC＇s characteristic with fuzzy multi-criteria methods combined to solve the fuzzy problems of criteria weight and qualitative attribute value. A case study of MC manufacturing company was provided to show that the procedure ,model and methods are effective to select outsourcing suppliers.     

Two Models of DMFC under Effects of Cathode Humidification Temperature and Anode Flow Rate

This paper introduced a novel self-adjustment of parameters of fuzzy neural networks. Then, the effects of cathode humidification temperature and anode flow rate on the performance of direct methanol fuel celI（DMFC） were described respectively. Two dynamic performance models of DMFC under the influences of cathode humidification temperature and anode flow rate were established separately based on fuzzy neural networks. The simulation results show the accuracy of the models established is satisfactory.     

黄浦江水上客运安全评价

为确保2010年上海世博会水上交通安全和黄浦江水上客运安全,在分析综合安全评估法(Formal Safety Assessment,FSA)目的、特点以及实施步骤等相关内容的基础上,按照FSA的模式,运用风险矩阵法和德尔菲法识别黄浦江水上客运危险源,并采用模糊数学理论建立黄浦江水上客运安全现状评价模型,从而实现对黄浦江水上客运安全的量化分析和评价,进而有针对性地提出决策建议。提出基于FSA的水上客运安全评价方法,可为世博会水上交通安全风险管理和黄浦江水上客运安全现状的提高提供参考。