皮革智能排样系统的开发

随着计算机技术的飞速发展，计算机智能技术也逐渐的被用到皮革生产的排样系统中。介绍了皮革智能排样系统的核心功能模块及其实现。提出了一种新的算法，来处理在不规则和有瑕疵的母板中对不规则形状的样片进行排样的问题。涉及了图形离散化算法、最优匹配算法和碰撞检测算法，并且给出了最终的排样效果图。     

ZVF型调节阀中不同阀瓣型线对局部流阻的影响

调节阀中不同阀瓣型线构成的通道，其局部流阻是不一样的。通过应用ANSYS2软件对DN50mmZVF型调节阀几种阀瓣型线在不同开度下构成的通道结构模型进行计算，从而得出流阻系数与开度的关系，并通过比较得到最佳阀瓣型线。该方法有很好的工程应用价值。     

相关反馈结合鲁棒局部二值模式的CBIR算法

提出了一种鲁棒局部二值模式结合相关反馈的基于内容的图像检索算法.鲁棒局部二值模式是一种性能较好的特征提取算子,对噪声和光照变化具有较强的鲁棒性,且不会造成原始数据的改变,可提高特征提取的准确性.相关反馈使系统可获知用户的偏好,对检索结果具有导向作用.多个纹理数据库的实验结果表明,提出算法的检索准确性和鲁棒性优于同类算法.     

电无级变速器的内燃机最佳效率控制

通过对混合动力汽车电无级变速器传动机构原理分析,提出一种内燃机最佳效率控制策略。该策略主要是基于底层控制系统的硬件结构,根据上位机发送的指令对双机械端口电机的内转子进行转矩控制,实现内燃机最佳效率运行;对外转子进行转速控制,满足车辆运行需求。并且给出了该策略下转矩辨识的方法;同时给出在整车中车辆总成控制与双机械端口电机控制系统和其他系统配合关系。通过实验,验证了该控制策略可以实现内燃机最佳效率运行同时满足负载侧连续平滑调速的可行性。     

数字信息可视化及其实现方法研究

本文首先提出研究数字信息可视化技术的意义,然后对数字信息可视化含义作出解释,并对数字信息可视化实现方法进行分类阐述,最后列举了数字信息可视化技术的新进展。     

Comparative Study between Aerosol Resuspension Model in GASFLOW and RnR Model

Based on the design parameters and conditions of the aerosol resuspension test for the validation of the RnR model, an analysis model was built by using GASFLOW code for calculation and simulation, and the results were compared with the calculation results of RnR model and the test data. The study results show that GASFLOW can simulate aerosol resuspension well in the main stage of resuspension. Under the condition of lower air velocity, the analysis results of RnR model are closer to the test data. Under the condition of higher air velocity, the results of GASFLOW model are more conservative. In order to improve the accuracy of the calculation results, it is suggested to consider the probability distribution characteristics of adhesion, and carry out further study on the feasibility of developing RnR model in GASFLOW.     

扣式电池壳体对锂离子电池材料性能测试的影响

采用空电池壳体组装扣式电池,研究在充放电测试过程中的稳定性.充电时,壳体发生氧化反应,并提供一定的充电容量;放电时,壳体未发生明显的还原反应.壳体的稳定性影响实际测试材料的充电曲线及首次效率.应对壳体进行评价,并选取适当的组装工艺,减小壳体的影响.     

压水堆核电厂堆外源量程探测器计数率分析

压水堆核电厂启动过程中,次级中子源为堆外源量程探测器提供本底计数率,避免测量盲区,确保反应堆安全启动。但次级中子源的引入会为核电厂带来较大的经济和环境负担,同时也需承受次级中子源破损等带来的风险。为此,可使用受辐照燃料组件的自发裂变中子源进行替代,即无源启动方式。通过研究堆外源量程探测器计数率的理论计算方法,并基于运行电厂测量数据进行分析验证,为源量程探测器计数率的理论预估提供了较为完善的理论方法流程。本文结果可为无源启动源量程探测器计数率分析提供支持,同时也可用于次级中子源装载量或布置位置的优化分析等。     

A general stochastic clustering method for automatic cluster discovery

Finding clusters in data is a challenging problem. Given a dataset, we usually do not know the number of natural clusters hidden in the dataset. The problem is exacerbated when there is little or no additional information except the data itself. This paper proposes a general stochastic clustering method that is a simplification of nature-inspired ant-based clustering approach. It begins with a basic solution and then performs stochastic search to incrementally improve the solution until the underlying clusters emerge, resulting in automatic cluster discovery in datasets. This method differs from several recent methods in that it does not require users to input the number of clusters and it makes no explicit assumption about the underlying distribution of a dataset. Our experimental results show that the proposed method performs better than several existing methods in terms of clustering accuracy and efficiency in majority of the datasets used in this study. Our theoretical analysis shows that the proposed method has linear time and space complexities, and our empirical study shows that it can accurately and efficiently discover clusters in large datasets in which many existing methods fail to run.     

Antireflection and band gap extension effects of ZnO nanocrystalline films grown on ITO-coated glasses by low temperature process

Zinc oxide (ZnO) nanocrystalline films coated on indium tin oxides (ITO, 90:10 wt%) glasses were prepared by low temperature process. The thin films were composed of uniform nanoparticles with average diameter around 8.4 nm. All samples exhibited excellent optical antireflective phenomena, and the maximum transmission reached 92.8% for the sample spin coated at 1500 rpm at 453 nm, improved by 21.5%. The antireflective results were explained by the coherence theory. And the antireflective effects were induced by the ITO and ZnO films. The calculated thicknesses of the ZnO films agreed well with the experimental results. The theoretical calculated band gap from the average diameter of ZnO nanoparticles was also well consistent with the experimental ones obtained from the optical transmission spectra. This result was promising for applications in organic solar cells.