1.物流系统
从系统的角度理解,物流是一个系统,它具有系统的所有特征。物流系统是指在一定的时间和空间里,由能够完成运输、存储、装卸、包装、流通、加工、配送、信息处理活动或功能的若干要素构成的具有特定物流服务功能的有机整体。
1. Logistics system
From a system perspective, logistics is a system that has all the characteristics of a system. Logistics system refers to an organic whole with specific logistics service functions composed of several elements that can complete transportation, storage, loading and unloading, packaging, circulation, processing, distribution, information processing activities or functions in a certain time and space.
2.物流系统网络
是物流系统的空间网络结构,是物流活动的载体。包括物流节点的类型、数量和位置,节点服务的相应客户群体,节点的连接方式以及货物在节点之间空间转移的运输方式等。
2. Logistics system network
It is the spatial network structure of the logistics system and the carrier of logistics activities. Including the type, quantity and location of logistics nodes, the corresponding customer groups served by the nodes, the connection mode of the nodes, and the transportation mode of the space transfer of goods between the nodes, etc.
3.物流系统规划设计的系统分析方法
在进行规划设计工作时,要按照系统方**中处理问题的基本方法,根据系统的概念,构成和性质,把规划对象作为一分系统进行充分了解和分析,再将分析结果加以综合,使之最有效地实现系统的目的,并且将评价方法贯穿于分析与综合过程中。
3. System ***ysis method of logistics system planning and design
When planning and design work, it is necessary to fully understand and ***yze the planning object as a sub-system according to the basic method of dealing with problems in the system methodology, according to the concept, composition and nature of the system, and then synthesize the ***ysis results to make it the most Effectively achieve the purpose of the system, and apply the evaluation method throughout the ***ysis and synthesis process.
4.物流节点的选址决策
确定整个物流系统中所需的节点数量,它们的地理位置,以及服务对象分配方案。达到最小化,服务最优化,物流量最大化,发展潜力最大化,综合评价目标。
4. Location decision of logistics nodes
Determine the number of nodes required in the entire logistics system, their geographic locations, and the service object allocation scheme. To minimize, optimize service, maximize logistics, maximize development potential, comprehensive evaluation goals.
5.物流节点的衔接功能
通过物流节点将不同运输方式或同一运输方式连接起来,通过多联式运输,实现集疏运输和干线运输,干线运输与干线运输的衔接。通过物流节点将运输、仓储、加工、搬运、包装等物流功能有效的联系起来,实现物流作业一体化。
5. The connection function of logistics nodes
Through logistics nodes, different transportation modes or the same transportation mode are connected, and through multi-modal transportation, the collection and distribution transportation and trunk transportation, and the connection between trunk transportation and trunk transportation are realized. Through logistics nodes, logistics functions such as transportation, warehousing, processing, handling, and packaging are effectively linked to realize the integration of logistics operations.
6.P-中值模型
一个给定位置和数量的需求集合和一个候选设施集合,分别为P个设施找到合适的位置,并指派每一个需求点,被一个特定的设施服务,使之达到在各设施点和需求点之间的运输费用之和最低。
6. P-median model
A set of demands and a set of candidate facilities for a given location and quantity, respectively, find suitable locations for P facilities, and assign each demand point to be served by a specific facility so that it can reach the difference between the facilities and the demand point. The sum of the shipping costs is the lowest.
7.覆盖模型
对于需求已知的一些需求点,确定一组服务设施来满足这些需求点的需求。分为集合覆盖模型,用最少数量的设施去覆盖所有的需求点;最大覆盖模型,在给定数量的设施下,覆盖尽可能多的需求点。
7. Override the model
For some demand points whose demand is known, a set of service facilities are determined to meet the needs of these demand points. It is pided into set coverage model, covering all demand points with the least number of facilities; maximum coverage model, covering as many demand points as possible under a given number of facilities.
8.车辆调度问题VRP
对一系列发货点和收货点,组织调用一定的车辆,安排适当的行车路线,车辆库存的通过,在满足指定的约束条件下(需求量、发货量、交货时间、车辆限制等),力争实现一定的目标。
8. Vehicle sche***ng problem VRP
For a series of delivery points and receiving points, organize the call of certain vehicles, arrange appropriate driving routes, and pass vehicle inventory, under the specified constraints (demand, delivery, delivery time, vehicle restrictions, etc.) ), and strive to achieve certain goals.