基于SMS的纸浆浓度调节系统

针对纸浆浓度调节现场的不足之处进行研究，采用了手机短信业务系统，并对其网络结构和逻辑框图。以及处理，流程中的发送信息和短信发送、接收的同步、短信反馈和延时以及系统软件构成等进行了可行性进行了分析。结果证明提高了现场运行效率，降低了系统的成本。     

BMC54－1型纸浆浆量计量控制仪

由８０Ｃ５５２单片机和纸浆浓度、瞬时流量、温度变送器以及高精度电控阀门等构成纸浆浆量计量控制仪，对测量数据进行处理，能准确地实现纸浆绝干浆量的计量和控制。     

一种超声波液体浓度传感器的研制

本文介绍一种通过测定溶液的声速而给出其中某组份浓度的超声波液体浓度传感器.简述了传感器的原理与设计,讨论了温度、声速与浓度非线性关系以及传感器几何尺寸误差等因素所产生的影响.     

铝电解氧化铝浓度控制研究

考虑到铝电解过程复杂多变的特性，对模糊控制在氧化铝浓度控制中的应用进行了探讨。构造了一个二维模糊控制器，输入为通过参数辨识方法得到的电阻-氧化铝浓度U形曲线的斜率值的偏差以及偏差变化率，输出为控制量加料间隔的增量。     

人工神经网络在传感器非线性校正上的应用

讨论了利用人工神经网络对浓度传感器进行非线性较正的原理以及神经网络权值的调整算法,并利用VB编程语言设计了非线性正参数的计算程序。     

便携式氧化锆氧分析计FCX-P

本文介绍了一种新型氧传感器以及采用这种传感器的氧分析计FCX-P的特点。     

基于SMS的纸浆浓度调节系统

针对纸浆浓度调节现场的不足之处进行研究,采用了手机短信业务系统,并对其网络结构和逻辑框图,以及处理流程中的发送信息和短信发送、接收的同步、短信反馈和延时以及系统软件构成等进行了可行性进行了分析.结果证明提高了现场运行效率,降低了系统的成本.     

8031在离子浓度测试中的应用

本文主要介绍一种采用８０３１单片机来控制测试溶液中离子浓度的方法以及此测量系统的软，硬件设计。     

颗粒物性对水平气力输送管中颗粒浓度分布影响的数值模拟

在考虑气-固流体的双向耦合、颗粒与颗粒的碰撞、颗粒与壁面的碰撞以及滑移摩擦的基础上，对气体相湍动能采用修正的k-ε二方程模型，颗粒相湍动动能采用颗粒动力学方法，发展建立了水平气力输送的数学模型和相应的计算方法，数值研究了颗粒粒径和密度对悬浮颗粒的浓度分布的影响。结果发现在水平气力输送中，在颗粒湍动、颗粒自身重力、颗粒与颗粒的碰撞以及颗粒与壁面的碰撞的共同作用下，颗粒浓度分布不均匀，其垂向分布存在着两种不同的形态。颗粒粒径越小、密度越低，越容易出现Ⅰ型分布：即颗粒浓度呈现出从管底部到管上部会先由小变大，到某位置时达最大值，尔后又向小变化的趋势。     

光纤荧光海藻浓度测量仪的研究

本文提出了一种检测海水中藻类浓度的新方法,在利用原有浓度检测原理的基础上,应用光纤和荧光技术,采用脉冲氙灯作为激发光源,并配合有效的微弱信号检测技术以实现藻类浓度的在线测量。该系统具有结构简单、水下探头无源以及高精度、高灵敏度等特点。实验证明,该系统用于海藻浓度的检测是可行的,也可应用此方法检测海水中其它物质的浓度。     

基于RS与GIS的典型地区土地利用/覆盖变化研究——以三江源生态环境重点保护区玛多县为例

典型地区和脆弱区的土地利用/覆盖变化是区域性研究的重要内容。三江源地区是国家级自然保护区,生态系统异常敏感和脆弱。以典型地区玛多县为案例,基于RS和GIS技术,系统研究了该地区土地利用/覆盖变化及其对景观格局的影响,探讨了生态环境演化过程,可为更广泛的区域性综合提供基础。研究发现:①10 a间,该地区湿地、水体和天然草地明显减少,湿地减少比例达到36.63%,大于6 hm²的湖泊减少近半数;沙地,裸地和盐碱地等明显增加,草地退化、沙漠化严重;②天然草地、裸地、沙地、水体、湿地和盐碱地之间的类型转化较为明显,且与水资源又有密切的关系。③多样性、均匀性指数和景观异质程度提高,土地趋于多样化和均匀化;裸地、沙地优势度增加,湿地、水体和天然草地优势度减少;整体破碎化程度呈缓慢减少趋势,而湿地、沙地破碎度增加。④综合土地利用动态度为0.98,天然草地、裸地、湿地、沙地动态面积变化较大。⑤研究区的土地利用/覆盖变化将深刻影响该地区的生态过程,同时还将影响三江源地区的水源涵养和供给。     

短信技术在大型整流装置远程监测系统中的应用

针对整流装置运行环境恶劣、故障率高和维护困难的特点,在分析了GSM网络特点的基础上,基于短消息(short messagesystem)技术开发一个远程监控与故障诊断系统;该系统由客户端和服务器组成,客户端负责采集数据、下达指令。服务器软件采用组态的方式开发,实现整流装置的在线监控、故障诊断报警、数据综合管理等。服务器与客户机之间采用SMS短消息进行远程通信;该监控系统具有使用方便、成本低等特点。该系统已成功应用于工业现场。     

氧化铝厂设备管理信息系统的设计及应用

根据氧化铝厂生产工艺及设备管理的特点，分析了氧化铝厂设备管理的现状及存在的问题。针对设备管理信息系统的现状需求，将信息技术与管理技术相结合，确立了系统的目标，设计了设备管理信息系统的结构以及功能模型。系统由设备管理子系统、设备采购子系统、固定资产子系统、工程项目管理子系统组成，并分析了子系统及主要功能模块间的数据流，给出了系统的信息模型及系统的软硬件及网络平台设计方案．对实施应用后的效益进行了分析。     

Computer networking at the National Computing Centre

The National Computing Centre installed a microcomputer-based local area network in 1981. The paper reviews the operation of this network since its implementation. The configuration of the network and the facilities it provides are described. The justification for such a network is examined, and the objectives of the installation are listed. The criteria on which the network was chosen are discussed, and implementation, training and support are described. The applications of the network are examined, along with user reaction, the impact on work and the benefits achieved. Problems and limitations of the network are also discussed.     

联合收割机脱粒滚筒恒速智能控制器设计

研究了轴流式联合收割机的控制问题,给出了联合收割机脱粒滚筒的数学模型,介绍了基于模式识别的智能控制原理,建立了联合收割机脱粒滚筒恒速控制模型,设计了基于模式识别的智能恒速控制器.应用Matlab/Simulink进行了控制器仿真,其结果表明,将基于模式识别的智能控制应用于联合收割机脱粒滚筒的恒速控制,其过渡过程平稳、响应速度快、无超调、无振荡并且无稳态误差.     

Disassembly sequence structure graphs: An optimal approach for multiple-target selective disassembly sequence planning

Modern green products must be easy to disassemble. Specific target components must be accessed and removed for repair, reuse, recycling, or remanufacturing. Prior studies describe various methods for removing selective targets from a product. However, solution quality, model complexity, and searching time have not been considered thoroughly. The goal of this study is to improve solution quality, minimize model complexity, and reduce searching time. To achieve the goal, this study introduces a new ‘disassembly sequence structure graph’ (DSSG) model for multiple-target selective disassembly sequence planning, an approach for creating DSSGs, and methods for searching DSSGs. The DSSG model contains a minimum set of parts that must be removed to remove selected targets, with an order and direction for removing each part. The approach uses expert rules to choose parts, part order, and part disassembly directions, based upon physical constraints. The searching methods use rules to remove all parts, in order, from the DSSG. The DSSG approach is an optimal approach. The approach creates a high quality minimum-size model, in minimum time. The approach finds high quality, practical, realistic, physically feasible solutions, in minimum time. The solutions are optimized for number of removed parts, part order, part disassembly directions, and reorientations. The solutions remove parts in practical order. The solutions remove parts in realistic directions. The solutions consider contact, motion, and fastener constraints. The study also presents eight new design rules. The study results can be used to improve the product design process, increase product life-cycle quality, and reduce product environmental impact.     

Design and analysis of area efficient QCA based reversible logic gates

The CMOS technology has been plagued by several problems in past one decade. The ever increasing power dissipation is the major problem in CMOS circuits and systems. The reversible computing has potential to overcome this problem and reversible logic circuits serve as the backbone in quantum computing. The reversible computing also offers fault diagnostic features. Quantum-dot cellular automata (QCA) nanotechnology owing to its unique features like very high operating frequency, extremely low power dissipation, and nanoscale feature size is emerging as a promising candidate to replace CMOS technology. This paper presents design and performance analysis of area efficient QCA based Feynman, Toffoli, and Fredkin universal reversible logic gates. The proposed designs of QCA reversible Feynman, Toffoli, and Fredkin reversible gates utilize 39.62, 21.05, and 24.74% less number of QCA cells as compared to previous best designs. The rectangular layout area of proposed QCA based Feynman, Toffoli, and Fredkin gates are 52, 28.10, and 40.23%, respectively less than previous best designs. The optimized designs are realized employing 5-input majority gates to make proposed designs more compact and area efficient. The major advantage is that the optimized layouts of reversible gates did not utilize any rotated, translated QCA cells, and offer single layer accessibility to their inputs and outputs. The proposed efficient layouts did not employ any coplanar or multi-layer wire crossovers. The energy dissipation results have been computed for proposed area efficient reversible gates and thermal layouts are generated using accurate QCAPro power estimator tool. The functionality of presented designs has been performed in QCADesigner version 2.0.3 tool.     

Application of optimal control theory to flexible robotic manipulations

The dynamic equatios of a single link flexible robotic manipulator and the measurements are formulated. The observer and the control law are derived based on optimal control theory. The numerical results of several cases obtained through computer simulation are presented here. The issues of nonlinearity and sampling rate, and the effects of gravity, white noises, and damping are investigated. The feasibility of real-time control of flexible robotic manipulators is discussed.     

磁能驱动微型泵的性能实验研究

在电磁场驱动原理的基础上,设计并研制了一种磁能驱动的微型泵。微型泵包括进／出液管、扩散管／喷管、驱动薄膜、腔体、电磁线圈和永磁体。微型泵的整体尺寸约为Ф11mm×4mm,腔室半径为5mm,深2mm。利用正交实验方法,对微型泵的性能进行了测试。在电压为4V、驱动薄膜厚度为6μm、频率为5Hz方波脉冲的最佳实验条件下,微型泵的最大泵送流速约为0．21mL／min。     

水电站大坝碾压混凝土温控措施应用研究

象鼻岭水电站位于贵州省威宁县与云南省会泽县交界处的牛栏江上,水库坝高141.5m,碾压混凝土工程量为81.93万m3,地处暖温带高原季风气候,受季风、地形、低纬的影响形成复杂多变的气候特征。象鼻岭水电站大坝是目前世界上第二高碾压混凝土双曲拱坝,大坝具有工程具有规模大、技术含量高、施工要求高等特点。大坝碾压混凝土温控问题十分突出,成为质量和进度的控制关键。针对象鼻岭水电站水文气象条件、工程施工特点及大坝碾压混凝土温度控制标准,为防止建筑物有害裂缝发生,对碾压混凝土浇筑的温度控制施工技术进行了系统的研究,突破了传统的碾压混凝土温控理念,大胆采用优化混凝土配合比、降低入仓温度、通水冷却、视频监控等新工艺、新技术进行碾压混凝土温度控制,取得良好的温控效果,使碾压混凝土的施工质量得到了更可靠的保证,为类似工程项目提供借鉴和指导。