基于生长时间光谱法的大肠菌群单管定量检测技术研究

通过研究大肠菌群初始接种浓度与达到0.2吸光度所需时间的关系,建立基于生长时间光谱法的大肠菌群单管定量检测技术。通过与多管发酵法比较发现单管定量检测技术的相对标准偏差小于传统的多管发酵法,而且反应所需的时间短,当初始菌浓为101.3cfu/mL时反应时间仅需9h,可以作为大肠菌群快速检测的方法,具有良好的应用前景。     

全自动生化分析仪用分光光度计

结合国家九五攻关"全自动生化分析仪的研制与开发"项目,研制了一种用于全自动生化分析仪的紫外 可见分光光度计。该分光光度计采用全息凹面平像场光栅为分光元件,以硅光电二极管阵列为探测器。光度测试采用后分光技术,从光源辐射的复合光先经样品溶液吸收后再由全息凹面平像场光栅分光,光电二极管阵列同时接收12路光谱信号,多个光谱信号同时检测,实现快速测量。     

一种无线传感器网络分簇路由协议优化算法

给出了一种无线传感器网络分簇路由协议的随机选择簇头优化算法,可针对分簇和数据传输两个阶段进行优化调整,加入节点连接度及能量参数,优化了网络的配置,克服了分簇不均匀的问题。仿真结果表明了算法的有效性。     

An Automated Inspection System

An automated inspection system for manufactured parts is proposed using a cloud of 3D measured points of a part provided by a range sensor, and its CAD model. In spite of the high precision attained by coordinate measuring machines (CMM), range sensors offer significant advantages for dimensional inspection: a high speed of digitisation and the capacity to take 3D measurements on the whole surfaces of a part without physical contact. The system first registers a cloud of 3D points with a CAD model of the part, then segments the 3D points in different surfaces by using the CAD model, and finally measures the control of the specified tolerances on the part. Results of the inspection are displayed in two ways: visually, using a colour map to display the level of discrepancy between the measured points and the CAD model, and a hardcopy report of the evaluation results of the tolerance specifications. Two range sensor technologies have been tested and inspection results are compared with the results obtained with a CMM.     

一种自动导引小车的导航优化算法研究

针对AGV纠偏过程中存在的调整时间过长,车身摆动比较大、经常掉线等缺点,为了提高小车导航的实时性、准确性和实现小车的可靠控制,在划分小车位置区间的基础上,提出了一种智能控制算法一自适应模糊PD算法。通过模糊模块在线调整PD控制模块参数,最终实现了小车左右轮速的实时调整,实现实时路径跟踪,并通过MATLAB仿真得到多组数据。仿真结果表明,利用该优化算法,小车导航具有实时性好、准确性高、不易掉线的优点。     

An Automated High-Sensitivity Vibrating-Coil Magnetometer

A magnetometer allows the measurement of the magnetic moment of samples in a range from 1.3 × 10^–8 to 5.45 × 10^–4 A m². The range of variation of the magnetic field strength is from 0 to 56 kA/m; the temperature range is 20–700°C. Measurements are performed in an air atmosphere. The obtained data are automatically inputted into a PC. In addition, the magnetometer can measure the coercive force H _c and the destructive field H _cr. It can also be used to study the formation of thermoremanent and viscous magnetizations and measure the Curie-temperature spectrum and the blocking-temperature spectrum. Measurements of the field, temperature, and time dependences of the magnetic moment can also be performed by the researcher or by special software using a more complicated algorithm.     

An Automated Monitoring System for an Experimental Coal Gasifier

ABSTRACT

A data acquisition system has been developed for the analysis of the performance of an experimental reactor unit for coal gasification. Pertinent data such as gas concentrations, temperatures, and pressures at several locations inside the reactor, and the flow rate of supply gases are collected. An automated calibration procedure of the gas analysis system is included. A minicomputer controls the time sequences of the individual events, allowing a high degree of flexibility. The intervals between two gas analyses can be made as short as 30 sec, the other data can be taken arbitrarily often. The system is suitable for expansion to monitor more physical quantities and to increase the number of observation points inside the reactor.     

波导法兰钻孔模优化设计研究

在雷达产品中,波导组件通过波导法兰盘端面的孔系进行定位连接,孔位置偏差大小直接影响波导组件装配后波导口之间的重合度。波导组件装配精度高,雷达传输系统的功率损耗小,产品电性能好。因此,优化波导法兰盘钻孔模的结构,提高法兰盘钻孔精度显得尤为重要。     

一种自适应的柔性制造系统优化调度算法

讨论了柔性制造系统的工序流程调度问题,首先通过对工艺流程偏序图拓扑排序求得每道工序的最早发生时间和最迟开始时间,利用关键路径法求得关键路径后引入层次分析法,定性与定量相结合综合考虑各种相关因素建立起自适应优化模型,从而使各数字控制设备加工任务队列根据系统实时状态及当前需求自动优化,具有最优化加工时间、平衡设备利用率以及调度简单均衡等优点.     

An Automated Practical Flaw-Identification Algorithm for Active Thermal Testing Procedures

Results of analyzing the infrared thermograms of flawed carbon-, glass-fiber reinforced composites steel, and aluminum samples obtained in active thermal-testing procedures are described. The reproducibility of the results of testing conducted by thermography operators using manual and automated image-processing procedures has been evaluated. The advantage of an automated thermogram-analysis algorithm that halves the spread in informative parameters over manual data processing has been demonstrated.     

基于CAN总线的人工气候室自动测试专家系统

人工气候室参数自动测试和智能化信息处理是实现人工气候室现代化管理的重要手段,本文介绍了基于CAN总线的人工气候室自动测试专家系统的基本组成,讨论了系统的工作原理与特点、硬件结构和软件流程.实际应用表明,这种自动测试专家系统能够实时检测植物生长的各种状态参数,因而具有广泛的应用前景.     

An Automated Pulse Diagnostic System for a Relativistic Microwave Oscillator

The software and hardware systems that automate measurements of the characteristics of the 0.4/6 linear induction accelerator and the radiation parameters of its relativistic microwave oscillator are described. The system contains a controller that controls the accelerator triggering process, the readout of the oscilloscope signals, and the timing of the operation of the experimental setup components; means for the spectral diagnostics of microwave pulses; and software and drivers that allow interaction between the equipment and a personal computer, the remote control of the operation of the experimental setup, and digital signal processing.     

基于表面等离子共振的自动化系统

在过去的15年中,从药物发现到基础生命科学研究,生物分子相互作用的无标、实时分析越来越成为一种横跨各学科的重要技术。而这个领域中不断壮大的仪器供应队伍也使得这项强大的技术被各种科研团体所熟知和应用。目前发展的一种普遍趋势是在系统中整合并行样品处理技术及更多的探测通道以增加实验通量。这既增加了设备的复杂性,又明显地提高了仪器成本。然而,自动化操作可以有效地保证样品处理的重现性,如再结合双参比相互作用数据集,那么几乎所有的运行流程都能得到一种极大的改善。Sens íQ Pioneer系统,一种高效的基于表面等离子共振技术（SPR）的生物探测系统,完整地涵盖了上述各种要素。     

便携式分光测色仪电路设计

为了实现对物体表面颜色的精确测量,介绍了一种基于分光光度法的颜色检测仪器的电路设计.该系统以LPC2478芯片为核心,首先控制脉冲氙灯曝光,实现对被测物体的照明,然后利用S4114-46Q光电二极管阵列对由光学系统分光产生的物体光谱信号进行分时采集,最后通过A/D转换和数据处理得到物体颜色信息,并将检测结果通过LCD显示输出.结果表明,系统功率低于5 W,单次测量时间为2 s,两次测量间隔为3 s;该设计具有测量时间短、体积小、功耗低等优点,适合应用于印染、纺织等需要现场测量的领域.     

浅析721型分光光度计故障及其排除

列举了７２１型分光光度计常见的小故障，分析了故障产生的原因，介绍了排除故障的方法。     

紫外可见分光光度计高精度信号采集与处理

紫外可见分光光度计测量信号由于受噪声、偏置、温漂、背景光等干扰,测量精度受影响会降低.文中采用了以混合信号微处理器C8051 F340单片机与24位AD转换器ADS1255为核心的双路数据采集系统,实时动态采集样品、参比与暗信号,经过相应数据处理,可有效滤除干扰,提高分光光度计的测量精度、稳定性以及重复性.     

齿轮齿条式机械转向器异响优化设计

主要对齿轮齿条式机械转向器因结构设计不合理而产生转向异响的原因进行了分析,提出了优化设计方案,并对优化设计前后相关零件的结构进行对比。该优化设计已经过试验验证及批量生产验证,可以应用于同类产品。     

基于CAN总线的储粮温度自动测试系统

提出一种基于CAN总线的温度自动测试系统,介绍了DS1820的工作原理、系统的硬件结构和软件流程。实际应用表明,这种系统能够实时检测粮仓温度,准确反映储粮的状态信息,具有广泛的应用前景。     

基于本体的制造网格服务自动链接

研究了一种基于本体、面向服务功能自动生成制造网格工作流构架的方法。制造网格本体采用制造领域本体与网格服务本体集成的方法来构建，前者由STEP集成资源、TOVE、PSL以正交方式分别实现产品、企业和制造过程子本体，后者通过扩展Web服务本体OWL—S实现。服务功能采用基于制造对象特征的输入、输出和基于制造任务的前提条件、效果组成的四元组建模，使用制造网格本体描述。在此基础上，提出了一种服务正向递进自动链接算法，它能够依据用户指定的输入和前提条件选择并链接服务，最终达到用户指定的输出和效果。通过一个原型系统和实例验证了方法的有效性，实验结果表明算法具有良好的性能。     

An Apparatus for Automated Cross Flow Solute Permeation Characterization of Membranes

Abstract

An apparatus is described for the automated characterization of ultrafiltration membranes using solute permeation in cross flow mode. The automated characterization approach described in this work lends itself well for the purpose of increased productivity and reducing operator fatigue/error. The operational, control, and data acquisition aspects of an automated membrane cross flow test unit, which are accomplished using LabVIEW 5.0? are described. The interpretation of the flux and separation data is independent of the apparatus and depends on the filtration regime and various theoretical models available. The apparatus can be used for reverse osmosis, nanofiltration, or ultrafiltration experiments, with appropriate selection of test cells and pumps.