新一代大型高参数全自动分蜜机

结合国内实际，研究成功了XJK－1320离心机。文中，介绍了该种机的组成、参数对比、结构特点和使用情况，对其效益也进行了分析。认为该种机，适用于大中型糖厂，是制糖生产较理想设备。     

A greedy switch-box router

The greedy channel router of Rivest and Fiduccia is extended into an efficient switch-box router. The algorithm is based on two simple operations called join-split-nets and jog-to-right-target derived from the channel router. Terminals are on the boundary of a rectangular region, and the router uses two orthogonal layers of wires to generate the solution. The router always succeeds in finding a solution by inserting sufficient horizontal and vertical tracks in case of insufficient routing area. The result is generated through a single column-wise scan across the routing region. The expected running time is proportional to M(N + N_net), where M, N and N_net are respectively the number of columns, rows and nets in the region. The scan direction is crucial to the algorithm and we have proposed good heuristic which is based on the augmented channel density distribution in finding it. Results from a number of examples are evaluated. The implemented router is designed for assembling custom VLSI designs, it works in parallel with other tools such as a layout editor via a simple interface. The router output is in CIF.     

挡板式滤汁快速沉降系统在甘蔗糖厂的应用分析

滤汁的稳定处理可大大提高糖厂效能和产品质量,挡板式滤汁快速沉降系统在糖厂的使用表明：设备性能稳定、操作简单、澄清处理效果好,待处理的滤汁不回流,沉清汁完全达到直接入蒸发罐要求,泥汁直接去真空吸滤机或压滤机,较好地解决了滤汁难处理的问题。     

基于营养液自动循环系统的烟草育苗方式

为解决烟草漂浮育苗中由于营养液静止不动而导致的根系生长受阻及烟苗生长不均匀的问题,对现有育苗设施进行了改造,研发了营养液循环系统,增加自动循环装置,并研究了基于营养液循环系统的烟草育苗方式.结果表明:与常规育苗方式对比,循环系统育苗营养液中的溶解氧浓度增加至2.24mg/L,烟苗根长、根系生物量显著提高,且生长速度加快,成苗期比对照(CK)提早9d,烟苗叶绿素、可溶性蛋白、游离氨基酸含量升高,生理素质提高.因此,营养液循环系统育苗方式有利于烟草壮苗的培育.     

自动控制系统在蒸发工段中的应用

本文从蒸发工段传统的人工操作存在的弊端、蒸发自动控制系统的介绍、自动控制系统的应用与经济效益等方面,论述来宾永鑫小平阳糖业有限公司蒸发自动控制系统应用所取得的成果。     

基于WinCC及S7-300的糖浆上浮自动控制系统

针对甘蔗糖厂糖浆上浮工序,基于西门子Win CC V7.0及S7-300系列PLC,设计了甘蔗糖浆上浮自动控制系统,该系统能够实现糖浆上浮工段主要工艺指标的自动控制。糖浆泵、助剂泵、制泡机、拨渣机均使用西门子MM420/430系列变频器进行控制,变频器通过Profibus DP总线同S7-300 PLC通讯。该系统软硬件结构设计科学合理,极大地提高糖浆上浮过程效率及自动化水平。     

SRMC—I型打浆度自动在线检测仪

本文介绍了SRMC-I型纸浆打浆度自动在线检测仪的组成、原理、性能指标、功能和使用。实际应用表明,该检测仪工作稳定可靠,使用方便,提高了打浆度检测的实时性,可在造纸厂推广使用。     

自动凯氏定氮仪测定烟草及其制品中的总氮

为了替代烟草及其制品中总氮含量测定过程中使用的有毒消解剂氧化汞,考察了消解剂用量对烟草及其制品中总氮含量测定结果的影响,并采用自动水蒸气蒸馏滴定仪测定样品中的总氮含量.结果表明,用硫酸铜替代氧化汞,当用0.4 g硫酸铜、6.0 g硫酸钾和12 mL浓硫酸消解烟草样品时,总氮含量测试变异系数小于2%,回收率在97.90%～103.85%之问.该法的测试结果与YC/T161-2002规定的方法无显著性差异.该法适合烟草及其制品中总氮含量的快速分析.     

基于VB的自动绘制立面图程序的设计

在建筑物采光分析测绘中,需提供大量建筑物的立面图,用于建模和后续采光分析。在以往的生产中,主要依靠在CAD平台下手工成图,生产效率低下,且容易出错。因此,开发一种自动绘制立面图的程序显得尤为迫切。本文以VB 6.0为开发环境,运用ActiveX Automation提供的接口进行AutoCAD的二次开发,重点阐述了利用VB控制Au-toCAD实现自动绘制立面图的思路和算法。投入运行两年来,极大地减轻了内业工作量,并有利于成果的标准化。     

Assessment of quality of fruits using impedance spectroscopy

This study deals with the development of a nondestructive impedance spectroscopic technique that may assess the conditions of the fruits to pluck them with the help of robotic arms. Preliminary investigations are made with the help of two‐terminal probe and an accurate LCR meter. The bulk impedance of mango has been measured to characterise raw and ripe fruits. Effective resistance and effective capacitance vs. frequency characteristics have been determined. The bulk effective resistances, of the ripe fruits, are found to be more than those of the raw fruits, in the frequency range of 1–6 kHz. In the same frequency range, effective capacitances of the raw fruits are found more than those of the ripe fruits. In the light of the data obtained, it can be said that the effective resistance may be used to differentiate between raw and ripe fruits in the frequency range of 1–6 kHz.