Additionally , provided that not all interarrival times distribution and ser - vice times distribution are of density function , the integral representation of the transient disribution of the queue length of these four queueing systems as indicated above is obtained by applying the theory of markov skeleton processes 此外,当到达间隔分布和服务时间分布不都有密度函数时,应用马尔可夫骨架过程理论,亦可得到上述四个排队系统的瞬时队长分布的积分表示。在处理上述这两个内容截然不同的部分时,所使用的基本方法是一致的。
Parking guidance system , which aims at promoting the efficient utilization of park lots and nearby roads , utilize advanced gps , computer , electronics , communication and gis to realize collection , transmission , processing and real - time distribution of parking information . pgs can provide drivers with the location , using status , type of parking lots near the destination , the travel route to these parking lots and related road traffic information via many method , such as vms , broadcasting , telephone , internet , in - vehicle equipment , to guidance drivers to park conveniencely and reasonably . pgs can reduce the additional traffic volume , traffic congestion , time and energy wastage , environment pollution due to searching parking space blindly , promote the utilization rate of parking lot , enhance economic benefit , social benefit and environment benefit , upgrade the level of urban traffic information services 具体研究内容如下: 1 、利用bp神经网络及其两种改进算法实现了有效停车泊位预测; 2 、提出了基于停车场选择的停车诱导路径优化思想、算法; 3 、总结了国外停车泊位预定技术的研究现状、停车预定模型,并设计了停车预定功能实现的物理框架; 4 、给出了可变信息板信息发布的发布策略,并提出了停车场“空、满”状态判定方法; 5 、阐述了各种高效的信息传输方式在停车诱导系统中的应用框架,给出了基于gprs的停车诱导系统通信方案设计。
It is very important that the understanding of regional metallogenic rules should be emphasized and the thinking of exploration and research opened up . in this thesis , mainly metallogenic types , tectonic setting , space - time distributions and the ore - controlling and metallogenic conditions for copper ore deposits in gansu province are studied on based inducing past formation which basic theories and methods of the modern geology , mineral deposits and related learning are applied and a serious of formation synthesized throughout depending on guide of regional . - metallogenic theories . a rule of development , enrichment and regional metallogeny would be preliminary summaries in terms of analyzing mineral prospecting for gansu ' s copper , gold and polymetallic minerals , and the relation between the indosinian - yanshan structural - magmatic activities is studied and exploration prospect and positions analyzed as well as a new countermeasure and thinking about research for minerals in this area be suggested 本论文在总结、分析前人成果资料基础上,以区域成矿学理论为指导,运用现代地质学、矿床学及相关专业、学科的基本理论与方法,综合多种成矿信息,对甘肃省铜矿主要成矿类型及其成矿地质构造背景、时空分布特征与主要控(成)矿条件进行了研究;从矿产勘查的角度,初步总结了甘肃铜、金及多金属矿产的发育、富集与区域成矿规律;探讨了印支-燕山期构造-岩浆活动与大型-超大型铜矿床的形成关系;研究分析了甘肃铜矿资源的勘查前景与找矿方向,提出了该区矿产勘查研究新思路。
So this paper systematically elaborates on the basic theory of modern logistics , describes the automobile industry distribution model on jitd ( just in time distribution ) with its basic principles , and discusses the strategy and steps of just in time distribution taking faw - vw as an example , hoping to improve the operation efficiency in automobile industry production , reduce logistic cost , and provide valuable instruction and reference for promoting enterprise competitive power 然后阐述了准时化配送系统的基本原理,介绍了准时化配送适应的环境和条件,准时化配送合理化的标志。接着从理论上研究了构建准时化配送系统的九个基本要素,总结了实施准时化配送系统的步骤和基本作业内容。接下来结合一汽大众物流的现状研究了大众是如何实施准时化配送的,重点论述了大众实施准时化配送的业务流程。
The second part mainly reviewed the study history , actualities and existinbg problem . this is helpful for the model building , variables selecting and parameter estimating , hi the third part , the arrival process and serve process are studied based on the survey data , especially the delay process is mainly analyzed including the dispersion vehicle headway time distribution 第三部分则根据实测数据,对交叉口车辆的到达过程和服务过程作了详细的分析,特别分析了车辆的受阻过程,并用对数正态分布拟合排队车头时距的分布,为模型的建立和车辆延误过程的模拟奠定了基础。
By the statistical analysis of the time distribution of the accidents , the accidents reasons , and the relationships between the accidents and the ship type , the accidents and the bridges , some important conclusions are made . in addition , the analysis of the ship - against - bridges accidents such as visibility , day and night , upriver ships and downriver ships are performed 通过对事故的时间分布、事故的原因以及事故与船型、事故与桥梁的关系的统计分析,得出了一些重要的结论,此外还对能见度、黑白天、上行下行等船撞桥事故的主要影响因素进行了分析。