Mining the Change of the Quality of Stored Grain

The quality of grain changes continually during its storage, including the change of its physical characteristics and physiological characteristics. This paper presents an approach to predict the change of the quality of stored grain with data mining technology. Logistic Regression, Decision Tree and Muitilayer Perceptron are applied to predict the change of the grains＇ quality control index and to obtain the grains＇ quality change probability. The grain sampling with higher probability can be processed earlier.     

视觉核感知器

将Mercer核思想和视觉理论相结合，提出了视觉核感知器算法(VKP)。相对于单纯的核感知器，视觉核感知器能更有效地解决了学习的收敛性问题。同时也有效地提高了核感知器学习的精度。大量的实验结果表明了本算法的有效性和某些情况下的优越性。     

一种支持向量预提取方法及应用

提出了一种支持向量预提取方法,对核感知机误分次数与决策边界的关系作了分析,引入了核函数和误分界,利用结构简单的感知机算法构建支持向量预提取模块,压缩样本规模,然后将处理结果输入支持向量机进行再处理,在精度和处理速度方面取得了较好的效果,仿真实验验证了这一方法的可行性。     

感知机网络模型

文章提出了一种利用人工神经元网络方法-感知机网络实现设计并训练一个印刷字符分类器，程序采用MATLAB5.3实现。     

感知机的反向传播学习算法

本文讨论人工神经元网络的反向传播模型，用对称Ｓｉｇｍｏｉｄ非线性作用函数对感知机的反向传播学习算法进行了探讨。     

Dynamic response characteristic of 7N01/7A01/7050 aluminium multilayer plate at high strain rate

The correlations between the structures, fracture behavior and dynamic shear property were investigated for 7050 to 7N01 layer of 7N01/7A01/7050 multilayer plate with different thickness ratio fabricated by hot rolling bonding. is The results showed that when thickness ratio of 7050 to 7N01 layer was 1 and 7050 layer was backplane, the absorbed energy of the multilayer plate was 39% higher than that of 7050 alloy. The excellent energy absorbing ability of 7N01/7A01/7050 multilayer plate is attributed to the blunted cracks in 7A01 interlayer, the enhanced 7050 layer by decreasing of secondary cracks and the delaying dynamic failure of 7050 layer.     

Electric transmission behavior of self-assembled Cu–W nano multilayers

Metallic nano multilayers were usually prepared by dual targets alternating deposition method. In this paper, a series of self-assembled Cu–W nano multilayers with different modulation periods were deposited on single crystal silicon substrate by dual targets confocal magnetron sputtering technique. The self-assembled film presented an alternation of W-rich layer and Cu-rich layer. The degree of coherence of the layered interface can be adjusted by controlling both the solid solubility of W-rich and Cu-rich layers. The film resistance increment of the self-assembled Cu–W multilayers is only 14% when the modulation period decreases from 68.2 nm to 5.3 nm,having less size effect compared to the film prepared by alternating deposition method. It noticed that the film resistance even decreased slightly when the modulation period decreased to below 5.3 nm. These results suggested that the coherence could weak the interface scattering ability to electrons, so the self-assembled Cu–W multilayers have lower resistance than the multilayer prepared by alternating deposition technique. This study presented a new pathway to enhance the conductivity of the multilayers.     

FORECASTING AUTOMOBILE WARRANTY PERFORMANCE IN PRESENCE OF ‘MATURING DATA’ PHENOMENA USING MULTILAYER PERCEPTRON NEURAL NETWORK

1. Introduction An automobile with over 7000 parts is a highly complex product. In spite of employing the best quality and reliability practices during product development, manufacturing, and assembly, unexpected failures during warranty period do occur and cost automobile companies billions of dollars annually in warranty alone. Warranty cost reduction programs in these companies thus receive a high priority. Various teams work together to achieve objectively defined targets for warranty cost…     

基于多层调谐的基追踪高分辨率阻抗反演

传统基追踪阻抗反演方法通过建立奇偶双极子库,模拟两层调谐条件下的奇偶地震记录。将实际地震记录分解到奇偶地震记录中,该方法存在不足之处是:实际地震记录存在大于两层调谐情况,两层调谐拟合难以较好处理多层调谐。本文通过建立四极子库,模拟四层调谐的地震记录。通过在四个地震记录上分解实际地震数据,克服了传统基追踪拟合多层调谐的不足,从而进一步提高反演分辨率。模型和HZ地区的反演结果对比表明拟合四层调谐的基追阻抗反演较传统基追踪阻抗反演效果提升明显。该方法可以较为明显地提高反演的分辨率。     

工程项目承包商多层次利益分配与激励机制

针对工程项目业主、承包商、分包商所形成的多层次管理系统,通过参与方之间的利益分配函数,基于多阶段博弈理论构建工程项目多层次激励协调模型.假设所有承包商风险中性且愿意为获得更多利益而付出努力,以承包商和分包商的利润为约束条件,形成合作关系.结果表明:承包商的努力协调程度与协调成本有关,与其固定成本无关;利益分配系数大小不仅取决于承包商努力协调效率,还与其他参与者的努力协调效率有关;承包商在增强自身管理能力时,还要与其他参与方协调,避免其他参与方搭便车而降低项目管理总体绩效.