查询词典 BP

At first, with the low-frequency data measured, three of the LRE fault detection systems for the real-time condition are proposed using the nonlinear identification technology of the BP neural network, the state estimation technology of the dynamic neural network, and the pattern recognition technology of the fuzzy hypersphere neural network. The learning algorithms of the BP and dynamic neural network are researched at the same time. Furthermore, while the engine operation is divided into the start and steady-state processes, the real time ability, the response time, the accuracy, the robustness, the sensitivity and the monitoring parameter optimization are studied. In the test data analyses of the YF-75 engine, the detection system correctly carried out for all normal tests, and in the three abnormal tests the engine faults were accurately forecasted.

首先，基于低频测量数据，采用BP神经网络的非线性辨识技术、动态神经网络的状态估计技术及模糊超球神经网络的模式识别技术，提出了三种发动机故障实时检测系统；同时研究了BP神经网络和动态神经网络的学习算法；另外还把发动机工作分为启动过程和稳态过程，分别讨论了神经网络故障检测系统的实时性、及时性、准确性、鲁棒性、敏感性及参数优化问题；在YF-75发动机试车数据分析中，不仅全部正确地监测了正常试车过程，而且准确地预报了三次异常试车中的发动机故障。

In order to overcome the problems of slow rate of convergence and falling easily into local minimum in BP algorithm, a new improved homotopy BP algorithm is put forward. It transfers the identity matrix of output mode in common use into the binary system.

为克服标准BP算法中存在的网络学习收敛速度慢、容易陷入局部极小等问题，引入同伦算法，提出了一种将同伦论与快速BP算法结合的改进算法，并采用二进制结构表示输出模式矩阵。

This paper emphasis intruduced back-propagation ANN model and its advanced. Based on the flood of Yangtze River at Luoshan and Hankou station, by using a self-adapt back-propagation algorithm, this paper established a BP nerve network model about riverway flood forecasting of Hankou considering the interzone inflow.

本论文着重介绍了BP神经网络模型的方法及其改进方法在河道洪水预报中的应用研究，将自适应BP模型引入，建立了考虑区间入流的河道洪水预报BP神经网络模型。

The length of homologous arms of deletion vector pC805S were 958 bp and 824 bp, respectively.

构建的敲除载体pC805S左右同源臂长度分别为958 bp和824 bp，将其转入受体菌M。

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。

In theory we require linear independence among variables used as inputting or outputting of BP net when we model the mineral processing plant with BP net. However it is always definite relativity in inputting variables or outputting variables in modeling of the mineral processing plant, which sets definite obstacle in high quality modeling.

在应用BP网络建立选矿厂数学模型时，理论上要求作为BP网络的输入变量之间或输出变量之间应是线性无关的，而选矿厂数学建模中，输入变量之间或输出变量之间往往存在着一定的相关关系，这对建立高质量的模型设置了一定的障碍。

To overcome the disadvantageous of the BP algorithm, slow convergence speed and easy to fall into local small extremum, self-adjustable learning rate and momentum method are used to improve the performance of BP algorithm.

针对BP算法收敛速度慢和容易陷入局部极小值的缺点，利用自适应学习率和附加动量法对基本的BP算法进行了优化，对学习率和动量因子的选择进行了探讨。

The result shows that there were two transcriptions in Muscovy duck, MSTN-1(EU336991) and MSTN-2(EU336992). MSTN-1 and MSTN-2 were 1128 bp and 754 bp separately, with homology up to 94%. MSTN-2 included an open reading frame, encoding 124 amino acids.

结果表明，番鸭体内存在2种MSTN基因转录本，MSTN-1(EU336991)和MSTN-2(EU336992)，大小分别为1128 bp和754 bp，同源性为94%；且MSTN-2是一个全新的MSTN转录本，含有1个开放阅读框，可编码124个氨基酸。

Using an improved genetic algorithm combined with a BP algorithm a new method IGA-BP,QSAR model was developed that links molecular structures of a set of 50 alkylated and/or halogenated phenols with their polar narcosis toxicity.

采用改进的遗传算法和BP人工神经网络相结合的方法，研究了50个酚类化合物的麻醉毒性和分子结构之间的相关性，并与单纯用BP人工神经网络建立的模型进行比较。

In the coupled-cell model, Ist significantly enlarged the gap conductance region where stable BP cell pacemaking and NP cell driving occur, reducing the number of BP cells required for robust pacemaking and driving.

在配对细胞模型，Ist明显扩大出现稳定BP细胞起搏和NP细胞驱动的缝隙电导区域，这就降低了稳定起搏和驱动所需要的BP细胞的数量。

Finally, according to market conditions and market products this article paper analyzes the trends in the development of camera technology, and designs a color night vision camera.

最后根据市场情况和市面上产品的情况分析了摄像机技术的发展趋势，并设计了一款彩色夜视摄像机。

Only person height weeds and the fierce looks stone idles were there.

只有半人深的荒草和龇牙咧嘴的神像。