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| 1 | 基于级比序列的离散GM(1,1)模型显示文摘针对离散GM(1,1)模型的模拟序列未能反映出原始数据序列的级比动态变化这一问题,通过对原始数据序列的级比序列进行建模,建立基于级比序列的级比离散GM(1,1)预测模型。该模型较好地保留了原始序列级比的动态性,结合原始序列与级比序列的关系,获得原始序列的模拟值。数值计算结果表明,基于级比序列的离散GM(1,1)预测模型,无论在相对误差还是平均相对误差的变动幅度方面,都优于离散GM(1,1)模型。 | 杨保华 方志耕 张可 | 2012 | 系统工程与电子技术2012,34,4: | 12 |
| 2 | 基于中心点三角白化权函数的灰色评估法在地下水水质评价中的应用显示文摘基于中心点三角白化权函数的灰色评估是灰色聚类分析法中划分对象类别的一种新方法,是对灰色的三角白化权函数的进一步改进,从而获得更加理想的结果。将这种方法应用于黑龙江省庆安县地下水水质评价中,经过研究表明,基于中心点三角白化权函数灰色评估评价得出的结果更加客观,与当地的实际情况也更加接近,这也为今后地下水水质评价研究方法研究提供了新的思路和借鉴。 | 刘婷 肖长来 王雅男 肖霄 | 2013 | 节水灌溉2013,,5: | 10 |
| 3 | NDGM模型的性质及预测效果分析显示文摘在近似非齐次指数序列的离散灰色模型(non-homogenous discrete grey model,NDGM)基础上研究了该模型的参数特性,分析了仿射变换导致的模型参数变化特征,结果表明,变换前后所得预测值仍然具有仿射变换关系,验证了NDGM模型对非齐次指数序列预测的无偏性。通过求解NDGM模型,给出针对一般指数序列的完全拟合表达式,并给出了求解近似指数序列最优拟合表达式的算法步骤。最后以1999年~2008年我国人均国内生产总值为例进行模拟和分析,验证了该方法在离散灰色预测中的可行性。 | 朱超余 谢乃明 | 2010 | 系统工程与电子技术2010,32,9: | 6 |
| 4 | 基于云计算的飞机PHM体系架构研究显示文摘针对目前国内飞机维修资源利用率较低的问题,提出一种基于云计算的故障预测与健康管理(PHM)体系架构。通过为云计算的虚拟层PHM资源建立基于粒子群算法的分配模型,使得在服务质量最优情况下,用户与资源的效用函数尽量大于需求与资源的效用函数。运用CloudSim平台进行仿真实验,结果表明,该体系架构可提高PHM系统的通用性和知识利用率,有效解决飞机维修保障中的资源优化问题。 | 李耀华 尚金秋 | 2017 | 计算机工程2017,43,12: | 3 |
| 5 | 基于灰色定性理论的无陷阱人工势场显示文摘针对传统人工势场中存在局部陷阱问题,提出一种基于灰色定性理论的人工势场算法.首先将环境中自由空间分解为一组凸多边形,以凸多边形的顶点和邻接关系作为关键信息,并分别构成灰色定性基本元和灰色定性关系,由灰色定性关系推理从起始点到目标点需经过的凸多边形序列,再用广义白化函数计算凸多边形序列中的势场.理论分析和实验均表明该算法能够确保机器人在有限的时间内安全到达目标点. | 李书杰 王鹏 陈宗海 | 2013 | 控制与决策2013,28,6: | 3 |
| 6 | Fault detection based on H_∞ states observer for networked control systems显示文摘The influence of random short time-delay to networked control systems (NCS) is changed into an unknown bounded uncertain part. Without changing the structure of the system, an H∞ states observer is designed for NCS with short time-delay. Based on the designed states observer, a robust fault detection approach is proposed for NCS. In addition, an optimization method for the selection of the detection threshold is introduced for better tradeoff between the robustness and the sensitivity. Finally, some simulation results demonstrate that the presented states observer is robust and the fault detection for NCS is effective. | Zhu Zhangqing Jiao Xiaocheng | 2009 | Journal of Systems Engineering and Electronics2009,20,2: | 1 |
| 7 | Grey Qualitative Modeling and Control Method for Subjective Uncertain Systems显示文摘A new approach to model and control an unknown system using subjective uncertain rules is proposed. This method is established by combining the grey system theory and the qualitative simulation method. The proposed approach mainly contains three steps. In the first step, subjective uncertain rules are accumulated gradually during cognizing the system; the mapping relations between the system inputs and outputs are built and represented using the grey qualitative matrix in the second step; in the third step,the generalized whitening function is defined to realize the transformation between qualitative and quantitative information. Besides the theoretical results, two sets of simulations based on a water level control system are conducted comparatively to demonstrate the effectiveness of the proposed method. The water level expectation is set to be constant in the first set, while it changes in the second set. The simulation results show that the proposed method tracks the water level expectation well. By combining the proposed method with proportional-integral-derivative(PID) or fuzzy logic controller(FLC), it can be concluded that the system can reach the stable state more quickly and the overshoot can also be reduced compared to using PID or FLC alone. | Peng Wang Shu-Jie Li Yan Lv Zong-Hai Chen | 2015 | International Journal of Automation and computing2015,12,1: | 0 |