润滑脂生产自动组态生产线控制研究与设计

为了解决现有润滑脂单元操作设备"一对多"或"多对一"生产线灵活多变,易发生因人工连接生产线操作失误,导致物料转移错误造成浪费等问题。提出润滑脂自动组态生产线控制方案,该方案采用批号控制策略,实现批号自动传递,保证物料只能在生产相同批号产品的单元设备之间进行传递,防止组合生产线失误,提高生产线连接的可靠性和生产效率。     

物联网的内存式数据处理技术研究

在物联网中所有智能装置都可以上网,因此所带来的信息总量非常大,但每个东西所传送的信息却很小,因此需要新技术快速地处理或储存这些大量的小信息。基于批次处理循序送出技术,结合存储器式处理技术、快速封包处理技术与远端机器储存日志的方式,提供快速接收并处理物联网信息的方法,并以硬盘效能最大化的方式批次循序更新至硬盘。     

EOQ Model: The Case in Which the Placing of Orders Is Rewarded

The first models of optimization of inventory management costs have undergone few changes since they were developed at the beginning of the last century. It is only with the passage of time that new scenarios have appeared with the introduction of new systems of production, and consequently of new strategies in the logistics chain. In this article, we analyze and propose a revision of the basic inventory model of economic order quantity first defined by Harris in 1913 for a scenario in which the owner of the stock receives a bonus or reward each time he replenishes his stock. This situation arises when the supplier receives a benefit (which he then shares with the customer) when managing his stock replenishment. An array of nested models is shown to illustrate this scenario, from which the constraints of previous scenarios have been removed. The model provides insights into the negotiation of batch size between supplier and buyer in a win‐win environment in the specific situation in which the supplier gives a bonus to the buyer at each stock replenishment. © 2011 Wiley Periodicals, Inc.     

舵机控制用PWM信号的研究与实现

当前生成PWM信号的方法繁多,生成的PWM信号的质量也参差不齐。针对这种现象,提出了PWM信号生成方法合理性评价四原则,实现了对各种生成PWM信号的方法具体全面的评价。然后提出了一种分时成组原理,利用这一原理,实现了一种基于C8051F040单片机的舵机控制用PWM信号生成方法。最后利用PWM信号生成方法合理性评价的四条原则,对此方法的合理性进行了评价。在实践中证明了评价结论的正确性。     

一种带有链约束的连续型批处理机调度问题

针对链式约束下工件释放时间和工期同序的情况,证明了即使所有工件都是单位加工时间时,极小化最大拖期问题也是强NP-难的.对于工件的零时刻都到达且同一链中工件工期相同的特殊情况,给出了多项式时间的最优算法.     

An Efficient One-Arrow-Two-Hawks Strategy Achieves High Efficiency and Stable Batch Variance for Benzodifuran-based Polymer Solar Cells

With the development of organic solar cells (OSCs), the high-performance and stable batch variance are becoming a new challenge for designing polymer donors. To obtain high photovoltaic performance, adopting polymers with high molecular weight as donors is an ordinary strategy. However, the high molecular weight need to subtly control the reaction time and state, inevitably caused batch-to-batch variations. Herein, a strategy of steric effect is applied to benzodifuran (BDF)-based polymer by introducing different positions of Cl atom, producing two polymers PBDFCl-1 and PBDFCl-2. The more twisted side chains conformation not only achieve the control of moderate molecular weight for PBDFCl-2, but also easily form molecular stacking through adopting BDF unit and maintain sufficient polymeric crystallinity. Due to the optimized stacking mode and good blend miscibility, PBDFCl-2-based device exhibitsa more elegant power conversion efficiency (PCE) of 17.00% compared to PBDFCl-1-based device. This is the highest efficiency record for BDF-based binary OSCs. Meanwhile, the PCE device variation of the different molecular weights for PBDFCl-2 is little, indicating the reduction of the batch variation. Therefore, smartly using steric effect of Cl atom in strong crystalline BDF unit can form efficient molecular stacking regulations and realize the coordination of high-performance and stable batch variance.     

事件日志的批量迹与过程模型的多视角对齐方法

在业务过程发现的一致性检测中,现有事件日志与过程模型的多视角对齐方法一次只能获得一条迹与过程模型的最优对齐;并且最优对齐求解中的启发函数计算复杂,以致最优对齐的计算效率较低。为此,提出一种基于迹最小编辑距离的、事件日志的批量迹与过程模型的多视角对齐方法。首先选取事件日志中的多条迹组成批量迹,使用过程挖掘算法得到批量迹的日志模型;进而获取日志模型与过程模型的乘积模型及其变迁系统,即为批量迹的搜索空间;然后设计基于Petri网变迁序列集合与剩余迹的最小编辑距离的启发函数来加快A*算法;最后设计可调节数据和资源视角所占权重的多视角代价函数,在乘积模型的变迁系统上提出批量迹中每条迹与过程模型的多视角最优对齐方法。仿真实验结果表明,相比已有工作,在计算批量迹与过程模型间的多视角对齐时,所提方法占用更少的内存空间和使用更少的运行时间。该方法提高了最优对齐的启发函数计算速度,可以一次获得批量迹的所有最优对齐,进而提高了事件日志与过程模型的多视角对齐效率。     

Formulation to obtain the most reliable aggregate mix with quantity and other constraints

The aggregate batch mixing problem determines the proportion (or relative masses) in which aggregate batches with different gradations are to be blended so as to achieve a target mix with a given gradation. As shown in previous studies, the gradation of a batch is not homogeneous and should be considered stochastic. Also, when batches are blended in the field there are random variations in the masses or proportions of individual batches in the mix. Assuming batch gradation and blend masses as stochastic implies that the notion of a mix (blend) satisfying the gradation of a target mix becomes stochastic. In such a framework, every mix has a reliability with which it satisfies the definition of the target mix. In addition, a mix is also required to satisfy various restrictions. This article presents an optimization formulation to determine the most reliable mix while satisfying restrictions on available quantity, budget, etc.     

并行机生产与具有等待时间限制的成批运输协调调度问题

研究了运输阶段具有等待时间限制的成批运输与并行机生产协调调度问题,目标为最小化制造期与运输费用之和．通过复杂性分析,证明其是强NP难问题,提出启发式算法并证明其最坏情况性能比为4—1／m．当一个运输批必须在同一台机器加工时,证明其也是强NP难问题．将加工时间与等待时间限定值进行比较,分别提出两个启发式算法,并证明其最坏...     

基于连续隐Markov 模型的发酵过程软测量方法

针对生物发酵过程中一些生物参量难以用仪表进行在线检测的问题,提出一种基于连续隐Markov模型（CHMM）的发酵过程软测量建模方法.为减少建模过程的计算量,提出了改进最小分类误差准则,用于CHMM软测量模型参数估计.为避免软测量结果在发酵过程监测与控制实际应用中存在的盲目性,提出了在线评价软测量结果可靠性的可信度评价指标.实验结果表明了所提出方法的有效性以及可信度评价指标的实际意义.