查询词典 process control

With the development of the computer,the PLC is perfected day by day.The function has overtopped the category of logical control and sequence control.It provides with simulation control,process control and remote communication,etc.

随着计算机技术的不断发展，PLC控制技术得以不断扩展和完善，其功能远远超出了逻辑控制和顺序控制的范畴，具备了模拟控制、过程控制以及远程通信等功能。

Network90 is a Distributed Process Control System developed by Bailey corporation in 1980's,which has awide application on producing process automatic control.

Network90分布式过程控制系统是Elsag－Bailey集团80年代推出的产品，在我国许多企业生产过程自动控制中有着广泛的应用。

The author analyzed total oxygen content, nitrogen content in steel made by typical process and the inclusion composition, change rule, morphology and distribution qualitatively and quantitatively by image analyzer, big sample electrolysis, SEM and energy spectrum analysis. The results showed that final inclusion form was small granule MnS, calcium aluminate, a small quantity of silicate and lumpy Al2O3. By intensifying deoxidation alloying process control in converter, argon blowing and slagging control and desulphuration and calcium reduction operation in refining course and overall-protection casting, the oxygen content was reduced by 20% above averagely, nitrogen content was reduced by about 10% and the inclusion content was reduced by 30%.

通过全O、N分析，夹杂物图像分析仪、大样电解、扫描电镜及能谱分析，定性和定量分析了典型工艺钢种钢中全O、N含量和工序过程夹杂物的构成、变化规律及形态、分布，分析钢中最终夹杂物表现形式主要为小颗粒的MnS、铝酸钙、少量的硅酸盐和块状Al2O3，通过强化转炉脱氧合金化工艺控制、精炼过程吹氩与造渣控制及脱硫和钙处理操作、全程保护浇注，钢水中O含量平均降低20％以上，N含量降低10％左右，铸坯中夹杂物含量降低了30％。

Product and process control: SPC control, preshipment sample audit and manufacturing process audit.

产品及生产过程控制：统计生产过程控制，出货前抽查和制造过程抽查。

PLC control system for sulphonation process shows the superiority of PLC over ot her kind of computer process control.

天津师范大学计算机系，天津，300074；天津师范大学计算机系，天津，300074基金项目：本文研究得到天津市教委科研项目基金(No.97102)资助。

Ball mill coal pulverizing system of pelletizing plant is a complex nonlinear multivariable process with strongly coupling and time-delay,and its operation often varies significantly. The automatic control of such a system is a research focus in the process control area.

球团厂钢球磨煤制粉系统是多变量强耦合、时滞、非线性以及生产工况变化大的复杂对象，其自动控制问题一直是控制界关注的热点。

Distributed control system based fieldbus is a new kind of control system, it connects UFCH, UFMH, UOPS, ULFS by databus mode. It integrates computer technology, communication technology and process control technology, adopts multi-layers frame to adjust to demand of high standard productive control and management.

基于现场总线技术的集散控制系统是一种新型的控制系统，它是采用总线方式将现场控制单元、现场监视单元、操作站、通信接口单元连接起来，综合了计算机技术、通信技术和过程控制技术，采用了多层次分级的结构形式，以适应现代高水平生产控制与管理的需要。

In order to solve the problem of poor precision and reliability of basis weight sensor used in papermaking process control system, the redundancy relations of sensors, and a new method to detect the sensor failures, and realize fault tolerant control for basis weight subsystem of papermaking process are suggested.

针对如何进行控制系统的高可靠性设计问题，在分析各种故障形式的基础上，建立了故障系统的数学模型，提出了能控意义上的功能冗余、系统的能控冗余度及某个部件对系统的能控重要度等概念，并对控制系统的可容错性进行了量化分析，从而为控制系统的高可靠性设计提供了理论依据。

The Process Control Section The production line process control system design good or bad decision can be largely controlled and safety.

各工段过程控制生产线的过程控制设计好坏很大程度上决定系统的可操控性和安全性。

Statistical process control is one technique for process control that was invented in 1924 by W.A.

统计过程控制是 W 。

Cynanchum Lingtai apricot production in the average weight 65 grams, the brightly-colored fruit, juicy rich, sweet-sour taste, sweet from the nucleolus, when the late Qing Dynasty famous Shaanxi, Gansu provinces, the Qing imperial court Tongzhi tribute for years.

灵台生产的牛心杏平均单果重65克，果实色泽鲜艳，汁多味浓，甜酸适口，离核仁甜，清末时就驰名陕、甘两省，清同治年间曾为朝廷贡品。

Chenopodium album,Solanum nigrum, and Amaranthus retroflexus were very susceptible to the herbicides. Polygonum persicaria and Abutilon theophrasti were relatively less susceptible to the herbicides, and Lycopersicon esculentum was not susceptible to it. The relationship between reduction rates of weed biomass and PPM values of weed leaves 2,4, and 6 days after treatment was established.

供试的6种杂草对该混剂的敏感性存在显著差异：红心藜Chenopodium album、龙葵Solanum nigrum和反枝苋Amaranthus retroflexus对该混剂最敏感，ED90值分别为47.65、71.67和29.17g/hm2；春蓼Polygonum persicaria和苘麻Abutilon theophrasti敏感，ED90值分别为96.91、114.20g/hm2；而番茄不敏感。