纸币包装机控制系统

分析了现今银行系统纸币捆扎方式存在的问题,设计了一种基于ARM的捆扎塑封一体的全自动纸币包装机.对纸币包装机的组成结构、工作原理、软硬件实现进行了详细介绍.实际测试结果表明本系统满足了纸币包装机一次性完成送钞、捆扎、切膜、封膜等所有过程控制的要求,提高了纸币捆扎塑封的效率.     

纸币机械式测厚系统运动过程试验研究

目前银行使用的高端点验钞机配备机械式纸币测厚系统,银行需通过该系统将厚度异常的纸币清分出来,特别是在纸币前端黏贴有胶带的纸币。针对机械式纸币测厚系统在走钞过程中由于弹片的抖动无法检测到纸币前端黏贴有胶带的问题,设计了一个抖动检测试验平台,并分别利用高速相机及电涡流传感器检测走钞过程中在冲击初始阶段测厚系统的弹片的弹跳。首先以测厚系统为样本搭建一个抖动检测试验平台模仿纸币在点验钞机中的走钞状态,然后利用高速相机拍摄测厚系统在走钞过程中的运动状态并通过描绘拍摄照片特征点得到测厚系统在走钞过程中的抖动轨迹,再利用安装在抖动试验平台的电涡流传感器检测走钞过程中测厚系统的抖动轨迹,最后结合弹簧质量系统进行理论分析。试验结果表明,能通过高速相机及电涡流传感器在抖动试验平台上清晰检测到走钞过程中冲击初始阶段测厚系统的弹片产生位移较大且维持时间占纸币过钞时间10%的弹跳。该研究结果可为改进设计提供依据及检测手段,为类似应用提供借鉴。     

模块无扰冗余切换技术在DCS中的实现

故障检测技术、仲裁和切换技术是DCS系统实现模块冗余的关键,同时也是难题.采用FPGA和分立元件构建了无扰冗余切换电路,设计并实现了模块看门狗复位切主、自动抢主和智能升主等冗余切换逻辑.仿真测试表明,该设计确保了模块发生故障时的快速无扰动切换,解决了模块切换过程中的双主和重复切换等难题.通过工程应用案例,验证了该项技术的可行性.     

基于嵌入式纸币识别系统的设计与实现

设计研究人民币纸币识别系统的主要模块,如图像特征采集、处理和识别.实时特征采集是基于嵌入式纸币识别系统的关键,结合uClinux操作系统和S3C4510B的特点,设计了以中断方式实现的实时特征采集系统,提升纸币识别系统的并发处理能力.在软件识别部分选取预处理之后的纸币图像的尺寸特征用模糊逻辑推理方法识别图像的面值,提取矩作为特征,采用RBF神经网络来识别纸币的正反面和正反向,并通过实验证明该系统的有效性和可行性.     

基于CPLD的控制器冗余设计

冗余技术是控制系统实现高可靠性的有效方法之一.文章给出了一种具有冗余切换功能的嵌入式系统控制器结构,并且详细介绍了冗余切换管理模块的CPLD实现方法,最后,仿真结果和实验验证了该模块的有效性.     

电子控制技术课15种演示的集成实验板

本文介绍的实验板以单片机STC12C5412AD为核心,设计了9个模块,实现15种电子演示功能,切换功能时不需要改接线路,只需开机时按健预置,可靠方便。     

自动售货机的设计与实现

设计研究自动售货机的主要功能模块,如图像特征采集、纸币识别、通信模块等.结合uclinux操作系统和S3C4510B的特点,设计了以中断方式实现的实时特征采集系统;在纸币识别部分选取预处理之后的纸币图像的尺寸特征用模糊逻辑推理方法识别图像的面值,提取矩作为特征,采用RBF神经网络采识别纸币的正反面和正反向;采用MDB/ICP总线协议协调自动售货机的主控制器(MMC)与多个外设之间通信.通过在自动售货机上实现,证明提出方法的有效性.     

自动售票机纸币处理模块的设计与实现

地铁自动售票机系统是实现整个自动售检票系统的重要部分,而纸币处理模块是实现地铁自动售票机系统功能的关键模块之一。经过对纸币处理设备通信规则研究,设计出合理的命令实现方式与发送流程。采用面向接口的设计方式,将该模块软件封装在动态链接库中。经测试验证,能够在规定的时间内完成与设备之间的通信,实现其自身的功能。     

基于Arduino的纸币整理分类控制系统设计

设计了一种基于Arduino开发板的纸币整理、分类控制系统。该系统采用Arduino Mega2560单片机作为控制核心,结合步进电机驱动板、颜色传感器、显示屏、语音播放模块等组成整套系统,实现了纸币整理、分类、显示、语音播报等功能。该系统利用Arduino IDE开发环境编写控制程序,通过模拟人工整理纸币过程实现纸币整理,通过颜色传感器采集数据以及算法控制,实现纸币分类,并通过实验证明了设计的可靠性、稳定性。     

纸币号码快速识别系统

开发了一种快速的纸币号自动识别系统,能在捆钞的同时自动识别并记录下通过捆钞机上的纸币号码。该系统首先通过CCD摄像头采集24位彩色图像,经过逻辑脊谷判断法分割、投影法定位、结构法识别几个过程输出号码串。实验结果表明,该系统组织设计的逻辑脊谷判断算法有效提取了号码图像,穿越号码体距离法定位号码准确,提出的号码识别系统取得了较高的识别率。     

Control of an ideal activated sludge process in wastewater treatment via an ODE–PDE model

The activated sludge process (ASP), found in most wastewater treatment plants, consists basically of a biological reactor followed by a sedimentation tank, which has one inlet and two outlets. The purpose of the ASP is to reduce organic material and dissolved nutrients (substrate) in the incoming wastewater by means of activated sludge (microorganisms). The major part of the discharged flow through the bottom outlet of the sedimentation tank is recirculated to the reactor, so that the biomass is reused. Only two material components are considered; the soluble substrate and the particulate sludge. The biological reactions are modelled by two nonlinear ordinary differential equations and the continuous sedimentation process by two hyperbolic partial differential equations (PDEs), which have coefficients that are discontinuous functions in space due to the inlet and outlets. In contrast to previously published modelling-control aspects of the ASP, the theory for such PDEs is utilized. It is proved that the most desired steady-state solutions can be parameterized by a natural control variable; the ratio of the recirculating volumetric flow to the input flow. This knowledge is a key ingredient in a two-variable regulator, with which the effluent dissolved nutrients concentration and the concentration profile in the sedimentation tank are controlled. Theoretical results are supported by simulations.     

烟包检测控制原理及其电路分析和PLC改造

介绍了烟包馐机的工作原理及电路分析,并以铝箔纸为例详细了烟包检测控制原理,并用 Ｆ Ｘ２ 可编程控制器予以改造。     

A simulation model for evaluating centralized vs. distributed inventory systems

This paper investigates an inventory problem encountered by the retail industry where a single organization operates through several customer outlets. Each outlet stocks several items for which a random demand reduces the level of inventory. The demand is dependent on the location of the outlet and varies from one location to another. Each item is replenished from one or more exogenous suppliers who have a positive delivery lead time. The ordering cost has both fixed and linear components. The items also have linear holding and shortage costs charged at the end of the review period. Inventories of the items are reviewed periodically and ordering decisions taken.     

Phase separation of parallel laminar flow for aqueous two phase systems in branched microchannel

Aqueous two phase systems (ATPSs) have good biocompatibility and special selectivity. Their phase equilibrium and applications in biological analysis have received much attention. Herein, parallel laminar flow (PLF) in the microchannel can provide an effective platform to enhance mass transfer and preserve separate phases simultaneously. As fundamentals in feasible and convenient sampling of PLF for ATPS, the phase separation methods and rules in branched microchannel were studied in this work, selecting PEG 4000 + Na₂SO₄ + H₂O as a model system. The exploration of flow pattern showed that a stable PFL was easily to form in the shallow microchannel of 200 μm (depth) × 600 μm (width), as long as the velocity of lower phase was higher than 0.51 mm/s. The phase interface of PLF could be easily controlled by the flow ratio of two phases. Single-phase separation could be reliably achieved in T-junction outlets when the flow rate of outlet ascertains to be smaller or larger than that of inlet on the same side. The trifurcate outlets with an extra middle channel could help realize a simultaneous two-phase separation. The flow rate of the extra channel is the key for the phase separation performance, the range of which available for simultaneous two-phase separation is determined by the resistance balance and the flow rates deviation offsetting as well. It is favor for increasing phase separation efficiency to make the products of flow rate, viscosity, and the length of corresponding outlet channel close with each other for the upper phase and the lower phase. The adjustable lengths of three channels can provide flexible choices to enhance simultaneous two-phase separation of diversified ATPSs at various operating flow ratios. A multiport microchip with T-junction inlets and trifurcate outlets designed for adjusting the lengths of branched channels on-chip is a convenient tool for PLF contact and in situ phase separation of ATPSs in varieties of application.     

Optimising newspaper sales using neural-Bayesian technology

We describe a software system, called just enough delivery (JED), for optimising single-copy newspaper sales, based on a combination of neural and Bayesian technology. The prediction model is a huge feedforward neural network, in which each output corresponds to the sales prediction for a single outlet. Input-to-hidden weights are shared between outlets. The hidden-to-output weights are specific to each outlet, but linked through the introduction of priors. All weights and hyperparameters can be inferred using (empirical) Bayesian inference. The system has been tested on data for several different newspapers and magazines. Consistent performance improvements of 1 to 3% more sales with the same total amount of deliveries have been obtained.     

基于PLC的二级增压供水控制系统设计

本文介绍了绍兴市制水有限公司曹娥江分公司二级增压泵站的控制系统.该系统主要包括下位机系统和上位机系统两部分.下位机系统采用rockwell公司CompactLogix系列的1769-L32E PLC作为控制核心,以增压泵站出口压力为控制目标值,采用PID算法,实现恒压供水,满足绍兴滨海新城区域企业用户的用水需求.上位机系统采用Wonderware公司的组态软件Intouch10.0设计,数据库采用SQL Server 2005.该控制系统运行稳定,具有较高的可靠性.     

News Recommendations from Social Media Opinion Leaders: Effects on Media Trust and Information Seeking

Polls show a strong decline in public trust of traditional news outlets; however, social media offers new avenues for receiving news content. This experiment used the Facebook API to manipulate whether a news story appeared to have been posted on Facebook by one of the respondent's real‐life Facebook friends. Results show that social media recommendations improve levels of media trust, and also make people want to follow more news from that particular media outlet in the future. Moreover, these effects are amplified when the real‐life friend sharing the story on social media is perceived as an opinion leader. Implications for democracy and the news business are discussed.     

ON THE INVENTORY OF HIGH TECHNOLOGY PRODUCTS UNDER CONDITIONS OF DECAY

The advent of the micro-computers and other high technology products with its supporting hardware/software components has been paralleled with a significant increase in the number of distribution outlets. Each commercial outlet has to carry a certain amount of inventory so as to provide a proper service to its customers. However, due to the fast change in the technology involved, numerous inventory items become obsolete at an accelerating rate. The same case applies to manufacturers of high tech equipment such as programmable computers, visual inspection systems, robots, etc. As long as the “Kanban“ (Just-in-Time) inventory system has not been adopted, the organization is faced with this problem. The problem can be treated as a perishable inventory problem. In this paper the analogy is developed and expressions for the required stock level are presented.     

基于模糊控制的重介选煤介质密度控制系统设计

针对某选煤厂原有的重介选煤系统介质密度控制以人工控制为主,从而影响控制效果的问题,设计了一种基于模糊控制的介质密度控制系统。该系统在原系统的基础上添加了一套新的PLC和监控软件。新的PLC从原系统中的PLC中读取现场的所有数据,并采用模糊控制算法将控制参数输入到原系统的PLC中,从而有效控制合格介质桶的出口密度。实际应用表明,该系统控制效果良好,且控制方法简单。     

自私性机会网络中的节点激励策略研究

机会网络中的节点由于自身资源受限,在转发消息时具有自私性。为了激励节点相互合作,已经提出的激励策略用虚拟货币激励自私节点转发消息,但存在虚拟货币不足和虚假报价的问题。为解决上述问题,提出一种基于可透支虚拟货币机制的节点激励策略。该策略设计了可透支的虚拟货币机制,以节点消息转发能力作为货币透支担保来解决虚拟货币不足的问题;策略中的交易机制保持资源状态和财富状态公开,如果消息交易无法一次完成,交易双方将根据对方的资源状态和财富状态友好地进行二次议价来抑制节点虚假报价的问题。仿真实验验证了该策略中节点激励机制的有效性以及可透支虚拟货币机制的有效性,并证明该策略有效地抑制了节点的虚假报价现象。