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A new knowledge acquirement way is presented based on the reliability data of product, then the fuzzy semantic net which consists of FEPM and fuzzy fault tree is regard as fault knowledge representation. The formalization of the fuzzy semantic net is described, and the relative concepts and relations are summarized. A stereo-knowledge representation which consisted of FFTF, rule and fuzzy neural network which make up of the shallow knowledge of the product is presented. The integrated fault diagnosis method based on the stereo-knowledge representation is suggested. The method is as follows. The fuzzy search inference is carried out on FFTF firstly. If the node being diagnosing can be decided if it failed or not in the fuzzy search inference, the rule inference to the node is carried out with the rules which being in symptom-fault way. An equivalent method, pattern recognization inference using fuzzy neural network, can fulfill the same work.
提出了以FFTF模糊语义网络为主、基于浅知识的产生式规则、模糊神经网络为辅的产品故障知识的立体知识表示方式,并提出了基于该多种知识表示的综合性故障诊断方法,即:首先对故障产品进行基于FFTF模糊语义网络的模糊搜索推理,如果在模糊搜索推理过程中不能确定当前诊断节点故障与否,则对当前诊断节点进行基于征兆-故障形式的验证式规则推理或者对包含该诊断节点的部件/子系统进行基于模糊神经网络的模式识别推理,如果在完成或者不再进行基于模糊语义网络的故障推理,仍然不能诊断出故障节点,则对基于模糊语义网络诊断过程中形成的故障诊断子图进行神经网络推理。
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This paper, based on the application of microcomputer digital processing and intellect and adaptive relaying principle describes a study on the performance of the adaptive current and voltage instantaneous trip protective relays, and a relay based on proposed principles is carried out.
本论文的主要工作是利用微机的数值处理能力和智能作用,采用自适应继电保护的理论,对自适应电流、电压综合速断保护的动作性能进行了理论分析,并且将理论应用于实际的装置之中。
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Two algorithms are put forward to solve the problem of on-board engine torque estimation, which is the key technology of Coordinated Control Algorithm. One is called the algorithm of engine torque estimation based on mean-value model and the other is called the algorithm of engine torque estimation based on instantaneous crankshaft speed.
在仿真研究的基础上,针对如何实现动态协调控制算法中的关键技术——发动机转矩在线估计提出了两种算法:基于发动机平均值模型的转矩估计算法和基于发动机曲轴瞬时转速的转矩估计算法。
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Based on the fact that the dye probe can intercalate DNA duplex to emit fluorescence, a novel method for detection of DNA polymerase has been developed. The polymerization process has been indicated by fluorescent signal in real-time. Based on this assay, the influence of anti-tumour drugs on the activity of polymerase has been investigated.
利用染料探针技术,建立了一种简便快捷地实时监测聚合酶活性的方法,探讨了三种抗肿瘤药物对聚合酶活性的影响,为以聚合酶为作用靶标的抗肿瘤新药的开发及筛选提供了一种新的思路。
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Biology technique is based on appearance symptom on sweet potato or Ipomoea Setosa after they are infected to identify virus. But it need long period and is apt to be limited by season. Based on coat protein of virus, serology detects virus during peculiar immunolog...
生物学方法是依据病毒侵染后在甘薯或指示植物上的外观症状进行识别,但检测速度慢,易受季节限制;血清学技术是利用病毒外壳蛋白的抗原性,据特异性的抗体抗原免疫学反应检测病毒存在,但制备抗血清需时间长,对含量少和无蛋白外壳的病毒无法检测;分子生物学方法是以核酸为基础,通过检测病毒核酸来证实病毒的存在,该技术具有灵敏度高、特异性强、适应范围广等特点。
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The paper proposes two new dimension reduction algorithms: The First is On the Expected Distortion Bound of Direct Random Projection. The second is Anchor points based Isometric Embedding under least square error criterion. On the Expected Distortion Bound of Direct Random Projection has a time complexity of O.
本文分别提出了两种新的维数约减算法:(1)基于期望扰动的直接随机映像算法On the Expected Distortion Bound of Direct Random Projection,简称DRP(2基于锚点集的最小平方误差等距嵌入算法(Anchor points based Isometric Embedding under least square error criterion,简称AIE)。
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One algorithm,isoperimetric algorithm based on graph theory is applied and researched on image segmentation.Firstly,isoperimetric algorithm is applied in still image segmentation,and the result is compared with two methods based on edge detection and region detection.
1引言图像分割是图像处理领域和计算机视觉中的一个基本而关键的问题,其目的就是将人们感兴趣的目标从图像背景中提取出来,为后续的分类、跟踪、识别、处理等提供基础。
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The prejudication judger system is not suitable for China.No matter based on the protection of the criminal suspect's rights or based on the considering on raising a litigation efficiency,the emphasis of the posit...
无论是基于犯罪嫌疑人权利保障,还是提高诉讼效率的考虑,强调和重视检察机关和律师在刑事诉讼中的地位和职能才是解决问题的根本途径。
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Through the characteristic parameters, the system's real-time moment of inertia is given. Then golden section adaptive control law and logic derivative control law both based on moment of inertia are designed. The two kind of control laws are combined to control the attitude of spacecraft and their simulation results are compared with the ones of PD control law which is designed based on the certainly-known system model. The results show that this adaptive control law is effective on the kind of time-variable system studied in this paper.
根据特征模型的参数推算了系统实时的转动惯量,设计了基于转动惯量的黄金分割自适应控制器和逻辑微分控制器,将这两种控制器相结合对带有可伸缩挠性附件的刚体进行姿态控制,仿真结果与基于确知系统模型所设计的变系数PD控制器相对照,表明了该自适应方法控制一类时变系统的有效性。
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There are five important soft sensor models of moisture have been established in this paper: the moisture model of The Recursive Least Square based on Lethe gene, the moisture model of Principal Component Regression , the moisture model of Partial Least Square, the moisture model of BP Nerve Network, the moisture model based on PLS—BP. All of these soft sensor models of moisture are systematically analysed by using Compound Correlative Coefficient. The factors which influence control of moisture are discussed on detail in this paper.
建立了五个重要的水分软测量模型,即渐消记忆递推最小二乘法水分模型;主成分分析法水分模型;偏最小二乘法水分模型;BP 神经网络水分模型;偏最小二乘BP 网络水分模型;对以上水分软测量模型用统一的评价指标复相关系数对它们的优劣进行了详细的分析,选出最适合水分建模的建模方法,同时对影响水分的各个因素进行了深入的分析和探讨。
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- 推荐网络例句
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Lugalbanda was a god and shepherd king of Uruk where he was worshipped for over a thousand years.
Lugalbanda 是神和被崇拜了一千年多 Uruk古埃及喜克索王朝国王。
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I am coming just now,' and went on perfuming himself with Hunut, then he came and sat.
我来只是现在,'歼灭战perfuming自己与胡努特,那麼,他来到和SAT 。
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The shamrock is the symbol of Ireland and of St.
三叶草是爱尔兰和圣特里克节的标志同时它的寓意是带来幸运。3片心形叶子围绕着一根断茎,深绿色。