Cargo & parcel loading and unloading in flight turnaround ground service is a multi - object parallel machines job sorting problem with time window and job shift time , its time window often be changed due to various reasons , machines service time is uncertain 摘要航班过站服务中的货邮装卸作业调度是一类有时间窗和作业调整时间的多目标多设备并行作业动态排序问题,其特点是作业时间窗和服务作业时间动态变化。
As far as we know , in the formal designing of product , the time of drawing is 34 percent out of total one of designing ; the time of revising of drawing is 8 - 9 percent . in the word , the workings on the drawing take almost half of the total time of designing 据有关资料表明,在常规产品设计过程中,绘图时间约占总设计时间的34 ,图纸修改时间约占8 9 ,编写零部件明细表时间约占5 ,也就是说图上的作业时间占总设计时间的一半左右。
When the data of logistics in current process are used for input of simulating logistics in future 100 % continuous casting process , supply of hot metal from iron - making process may not satisfy the needs of 100 % continuous casting on raw materials . because planning scheme in continuous casting process depends greatly on smelting scheme in convertor vessel , it is important for operator to balance raw materials supply , smelting and casting in order to realize the scheme of 100 % continuous casting . when some equipment are work abnormally , mixer of hot metal and lf furnace can be used for logistics buffer 用攀钢炼钢生产数据对仿真软件系统进行的测试和仿真研究结果表明:仿真系统的随机数发生算法可以实现对作业时间的依分布随机抽取;在相似的输入条件下,仿真结果与实际生产物流的时间分布规律基本吻合,达到了仿真软件设计的预期目标;若以攀钢提钒炼钢厂现工艺的铁水输入作为全连铸后的输入条件,则现工艺的物料供应能力可能难以满足全连铸生产的要求;连铸机的连浇计划对转炉炉次计划的编制有很高的要求,合理安排来料、炼钢与浇铸三者间的物流平衡关系将是保证全连铸作业的重要条件;当出现设备异常情况时,可以利用混铁炉与lf炉站前等待作为物流缓冲池,通过延长系统的平均物流时间来缓解因设备检修和故障等扰动所造成的影响,确保生产的顺利进行。
At the same time , the function of measuring coal in every coal storage bunker and measuring coal before its entering into every boiler greatly improves productivity of the whole loading and unloading coal system . . on the aspect of operation technics of the loading and unloading coal system , this article analyzes factors which affect operation technics of coal - whippers , stacking conveyers and pusher tractors . no standardization in daily operation , low safety , long operation time and out of line among different machines reduces the efficiency of the loading and unloading coal system 卸煤操作工艺方面,主要分析了卸船机、堆取料机和推扒机在日常作业过程中影响作业工艺的因素,在日常作业过程中主要存在问题是无标准化作业要求,安全得不到保障,作业时间长,各作业机械之间配合差,从而影响整个卸煤系统的作业效率,本文通过对卸船机、堆取料机、推扒机作业流程的设计,规定了单个机械的作业程序,以及相互之间作业时的配合方法,使卸船机作业和堆场作业更规范化,同时,大大缩短卸船作业时间,提高了码头泊位利用率,减少机械作业时间,从而提高了整个输煤系统的工作效率。
Water shutoff agent dsz - a is composed of inorganic particle . its specialities are low cost , easily flow , high strength and long valid period . the agent suits non - selective water shutoff in sand formation . dsz - a not only can plug high water - bearing formation , but also can plug case leakage . dsz - a has been applied on site and gotten good effect . it is a agent which has wide prospect 随着油田勘探开发事业的发展,越来越多的新技术被应用于油田的作业领域.和传统的挤水泥方法相比,利用水泥承载器用循环法挤水泥封窜作业,不仅操作简单,而且可以保护油层,减少油层损害,同时降低作业成本、缩短作业时间
The main procedure and steps are following as : according the random characteristic of the time spent by each work procedure , computer simulation is applied to produce the most possible scheduling network . and by corresponding optimization and adjustment on the network , the cost and scheduling construction network can be obtained ; during the practical construction according to the network , the warp between the actual cost and expected scheduling is tracked dynamically . then the computer simulation system is used to predict the future cost and progress operation , and take corresponding precautionary measures to control beforehand 其主要思想与步骤为:首先运用计算机仿真技术来仿真工序作业时间的随机特性,产生概率最大的施工网络计划,并对其进行优化和调整,以获得满足工期、质量要求的成本及网络计划;在施工过程中动态跟踪施工实际成本与进度与目标计划所发生的偏差以及质量问题,然后根据已出现的偏差,利用计算机仿真技术对项目未实施部分进行进度、成本的预测和分析,根据现有信息对网络计划未完成部分进行调整和优化,以尽可能把各项费用控制在预定计划成本之内或使工程的综合指标最优。
Method 1 is based on spa method of comprehensive judgment . case ( 1 ) : several experts in this field estimate connection number of productive time of a working procedure . expression of connection number is got by method of comprehensive judgment , which considers every experts suggestion 方法一:基于集对分析的工序作业时间综合评价法:情况(一) :由若干名领域专家分别估计出工序作业时间的联系数表达式,用综合评判法得出全面考虑各名专家意见的用联系数表达的工序作业时间。
Based on the national " ninth " five years " key project - study on the equipment and technique of raising and transplanting seedlings as the kind of factory , combining the no - tillage specialty which can shorten the working period and reduce the intension of dust devil , the key parts of corn no - tillage transplanter has been studied which can improve both the transplanting speed and reliability , reduce the labour intension of operator , further more , the method of automatic controlling whole working course has been applied by using single - chip microcomputer , the bedrock is made for transforming this technique into social productivity 本文在原来国家科技部“九五”攻关项目“工厂化育苗、移栽工艺及设备研究”的基础上,结合免耕工艺不仅缩短作业时间,而且可以对防止沙尘暴发生有利的特点,对可以提高栽植速度和工作可靠性、降低操作人员劳动强度的玉米免耕栽植机的关键部件进行了详细的研究,进一步采用单片机控制技术对其工作过程实现了自动化控制,为该技术尽快转化为社会生产力打好基础。
Factors which influence productive time of a working procedure , can be divided into several grades , four grades in this thesis , that is : { absolutely completion , completion , probable completion , unable completion } . corresponding elements of state sort table are adopted , that is four elements state sort table . connection number expression is found by the method of weighted value 对影响工序作业时间的若干影响因素( f _ 1 f _ n ) ,可以根据需要将评判结果分为几个级,比如分为{肯定完成,能完成,可能完成,不能完成}四个,那么应采用相应元数的态势排序表,即四元态势排序表;然后运用加权平均法求出工序作业时间的联系数。
At last , the heart beating speed and blood pressure of taxi drivers and the response time are measured after the vibration duration is 0 , 2 , 4 , 6 , 8 , 10 hours . the phenomena that response time is longer and longer , the rate of heart beating is faster and faster and blood pressure raises firstly and then decreases are founded . the drivers will suffer from fatigue in about 8 hours 最后,本论文在国内外首次对出租车驾驶员工作0 、 2 、 4 、 6 、 8 、 10小时后的心跳速度和血压这两个生理指标及反应时间进行了测量,并发现随着工作时间的增加,出租车驾驶员的反应时间逐渐加长,心跳速度逐渐增加,驾驶员的血压先增加后降低;发现出租车驾驶员大概在工作8小时之后疲劳,与驾驶员的主观感觉完全吻合;通过计算,职业驾驶员疲劳时对应的估计振动剂量值为: 11 . 12ms - 1 . 75 ,依此可以将此研究成果推广到其他类似出租车驾驶员的职业驾驶员的疲劳判别中,从而可以制定出更合理的作业时间。