基于消息中心的可重配MES的研究

针对现代制造执行系统(manufacturing execution system,MES)有高可重配性需求的问题,提出一种基于消息中心构建可重配MES的方法.首先提出消息中心的框架,具体论述了消息中心中应用的消息机制、事件驱动方式以及事件处理方法;其次根据应用方法的需要,建立消息中心静态模型,并配合MES的Petri Net过程模型,构建消息中心的模型库和规则库,以用于复杂事件处理引擎中进行事件的监测和决策;最后以一个制造系统为实例,验证以消息中心为核心的MES的可用性和柔性.结果证明该方法能够满足可重配MES开发的需求.     

基于Prolog的函数语言解释执行

通过介绍一个用逻辑语言Prolog设计的函数语言解释执行器原型,展示结合不同的声明式语言进行软件开发的方法。该法可实现不同语言优势互补,以提高生产效率和软件可靠性。通过函数语言解释执行实例,验证该解释执行器的有效性。     

低盐隔氧盐渍处理对芙蓉李胚原料及其加工品质的影响

对不同盐浓度腌渍李胚的加工品质进行评价,并为李胚低盐隔氧腌渍贮藏与加工利用提供理论依据。以芙蓉李鲜果、低盐隔氧(盐度分别为10.0,12.5,15.0°Bé)及传统高盐(盐度23.0°Bé)处理的李胚原料为研究对象,采用主成分及聚类分析法评价贮藏期间的质构参数、理化指标及感官评价等加工品质指标。主成分分析表明,11个品质指标可提取出累积贡献达83.08%的主成分3个,分别反映直接感受、黏性感受和咀嚼感受。聚类分析将21个处理组分为3大类:处理组1(鲜果)、处理组17(盐度23°Bé、贮藏4个月)和处理组21(盐度23°Bé、贮藏5个月)、其他18个处理组。分别以低盐隔氧腌渍的李胚(盐度10°Bé)与高盐腌渍的李胚为原料加工成李果蜜饯,前者的硬度及咀嚼度略低于后者,其他质构参数差异极不显著,加工的蜜饯品质相当。     

试论本国国民不引渡原则

大陆法系与英美法系对于是否引渡本国国民有不同的立场。中国对此采取与大陆法系国家相同的立场,即拒绝引渡本国国民。近年来本国国民不引渡原则有所松动。一些国际公约鼓励各国附条件的引渡本国国民,同时向国际司法机构引渡本国国民日益成为各国的义务。     

基于高层体系结构的冷轧机仿真系统设计

为解决冷连轧机仿真系统的可重用性和可扩展性,以及子系统接口和集成问题,采用了HLA标准对冷连轧机仿真系统进行了再构建.建立了基于HLA的冷连轧机仿真系统,仿真联邦包含模型库、数据库,基础自动化,虚拟轧机、动画显示和虚拟操作台等仿真应用的仿真邦员.设计了仿真系统的联邦执行过程,根据仿真系统对性能的要求,设计了分布式和层次式的RTI的结构,给出了联邦成员之间的公布与定购关系以及邦员间实例属性的所有权迁移过程.     

优化控水技术在马寨油田的应用

应用注水井、生产井的现有资料和优化控水技术基本程序 ,分析了产油井产水量高的原因 ,建立了调剖井的定量的筛选标准 ,对马寨油田生产井和注水井的调剖处理进行了排序和程序设计 ,对调剖技术和马寨油田近三年优化控水措施的结果进行了讨论和分析 .最优化控水技术的关键是评价注水井和油井的连通程度 .评价结果表明生产井和注水井之间存在很好的相关系数时 ,调剖后 ,生产井一般均受到好的影响 .     

Simutaneous radar imaging and velocity measuring with step frequency waveforms

The principle and method of both radar target imaging and velocity measurement simultaneously based on step frequency waveforms is presented. Velocity compensation is necessary in order to obtain the good High resolution range profile since this waveform is greatly sensitive to the Doppler shift. The velocity measurement performance of the four styles is analyzed with two pulse trains consisted of positive and negative step frequency waveforms. The velocity of targets can be estimated first coarsely by using the pulse trains with positive-positive step frequency combination, and then fine by positive-negative combination. Simulation results indicate that the method can accomplish the accurate estimation of the velocity with efficient computation and good anti-noise performance and obtain the good HRRP simultaneously.     

基于DCNN的弹道中段目标HRRP图像识别

针对弹道中段目标识别问题,现有的基于高分辨距离像(high resolution range profile, HRRP)的识别方法直接提取一维HRRP(1-dimension HRRP, 1D-HRRP)的整体特征,对局部特征提取能力较弱,且由1D-HRRP数据提取的特征的表达能力有限,为此提出了一种基于深度卷积神经网络(deep convolutional neural network, DCNN)的弹道中段目标HRRP图像识别方法。首先,将1D-HRRP转化为0-1二值图像,从而把数值变化特征转化为图像结构特征;然后,构建DCNN逐层提取图像的局部特征和共性特征并进行识别;最后,结合Dropout和L2正则化双重机制缓解DCNN过拟合问题,利用AdaBound算法提高DCNN训练收敛速度和识别正确率。实验结果表明,所提出的基于HRRP图像的弹道中段目标识别方法比其他12种基于1D-HRRP或二维HRRP(2-dimension HRRP, 2D-HRRP)的识别方法正确率更高,在测试数据集上达到了96.28%,实验结果验证了该方法的有效性。     

Heavy metals contents in soil profiles of typical agricultural lands in Yixing,Jiangsu Province,China

The effect of land use pattern on the heavy metals(HMs)distribution in soil profiles was investigated in Yixing City,China,for the four typical types of land utilization,i.e.vegetable fields on the plain,paddy fields,tea gardens on hilly lands and bamboo groves.The variance of HMs concentration in the depth of 0-15 cm,15-30 cm,30-60 cm of soil profiles was compared among the different tillage ages. Results showed there was a notable accumulation of Cd,Hg,Cu,Pb,Zn and Cr in the soil profiles of vegetable fields and paddy fields causing a pollution of Cu,Hg and Cd in some profiles,while no remarkable accumulation of HMs in the soil profiles of the tea gardens and bamboo groves was found. The accumulation extent of HMs in the soil profiles of the four kinds of land use followed a sequence of vegetable fields>paddy fields>tea gardens>bamboo groves.The accumulation of HMs was mainly due to the industry,transportation,other urban human activities,and intensive use of fertilizers and pesticides.The downward leaching of HMs was relatively remarkable in the soil profiles of vegetable fields. There was an accumulation in surface and subsurface layers for Cd,Hg,Pb,Zn in the soil profiles of paddy fields and tea gardens,and for Cd,Hg in those of bamboo groves.Serious pollution effects of Hg, Pb,and Zn have been shown in the soil of vegetable fields.All the four kinds of agricultural land are basically free from the pollution of the external sources of As and Ni.With the increase of tillage time, the soil of vegetable and paddy fields will face the potential risk of HMs pollution,which mainly comes from Hg,Cd and Cu,whereas that of tea gardens and bamboo groves faces a relatively small risk.     

DCCS： A General-Purpose Distributed Cryptographic Computing System

0 Introduction Ageneral-purpose cryptographic computing system plays an important role in cryptography and becomes a hot topic step by step. In 1987, Lenstra[1] developed a distributed factoring system which made use of elec- tronic mail for the distribut…