物流專業(yè)畢業(yè)論文外文翻譯-其他專業(yè)-wenkub.com
2025-01-15 03:34 本頁面
【正文】 從一個(gè)廠址的輸出商鋪到另一個(gè)廠址的輸入商鋪之間的關(guān)系被稱為外部聯(lián)系。輸入商鋪接收并儲(chǔ)存來自上游廠址的不同種類的部件，輸出商鋪則儲(chǔ)存該廠址的成品（在圖 2中，一個(gè)廠址由一個(gè)虛線框表示，包含輸入商鋪和輸出商鋪）。材料接收操作是從上游廠址接收輸入材料，然后將他們作為儲(chǔ)備儲(chǔ)藏起來，以便用于生產(chǎn)。該網(wǎng)絡(luò)中的所有廠址都能夠構(gòu)建零件、組件或成品，無論是按庫存生產(chǎn)模式還是按訂單生產(chǎn)模式。 3. 一個(gè)物流鏈的綜合建?？蚣? 物流鏈可能會(huì)因網(wǎng)絡(luò)結(jié)構(gòu)（串行、并行、裝配和樹狀分布 ）、產(chǎn)品結(jié)構(gòu)（材料清單的水平）、運(yùn)輸模式、和他們面臨的不確定性程度而異。本文中，提出的模型將每個(gè)階段的 隊(duì)列分解成兩個(gè)部分，一個(gè)積壓隊(duì)列和一個(gè)材料隊(duì)列。服務(wù)站之間的傳送時(shí)間假設(shè)為具有指數(shù)分布的相互獨(dú)立的隨機(jī)變量。 Azaron 等人 [3]為多級(jí)組裝開發(fā)一個(gè)開放的排隊(duì)網(wǎng)絡(luò) ,在其中每個(gè)服務(wù)組件在多級(jí)站代表一個(gè)生產(chǎn)或裝配操作。接下來，我們將回顧一些先前的致力于解決以上描述的類似問題的文獻(xiàn)。第四部分提出了一種分解方法，將整個(gè)物流鏈分解成多個(gè)單一階段的排隊(duì)網(wǎng)絡(luò)，并通過分析單一階段的排隊(duì)網(wǎng)絡(luò)，提供了幾項(xiàng)提高物流性能得措施。每 個(gè)單一階段多級(jí)庫存隊(duì)列的輸入（原材料或組件到達(dá)過程）都用于捕捉原始鏈中的輸入流的特點(diǎn)?；纠砟钍窃趲讉€(gè)參數(shù)（通常是兩個(gè)，一個(gè)代表速率，另一個(gè)代表可變性）近似地描述到達(dá)每一隊(duì)的過程后，再近似地分析單個(gè)列隊(duì)。仿真技術(shù)也可用于分析該系統(tǒng)的性能表現(xiàn)，但要想找到物流鏈的一個(gè)優(yōu)化配置，許多不同的系統(tǒng)變量都應(yīng)進(jìn)行評(píng)估。該網(wǎng)絡(luò)中的每一階段或每一節(jié)點(diǎn)都只生產(chǎn)單一產(chǎn)品的假設(shè)，并不與現(xiàn)實(shí)世界的情形一致，因?yàn)閹缀跛泄驹谟邢薜姆?wù)能力內(nèi)，都生產(chǎn)了好幾種產(chǎn)品。庫存包括原材料、組件和成品，經(jīng)常占生產(chǎn)型企業(yè)總資產(chǎn)的 20%到 60%。這些不確定性降低了該網(wǎng)絡(luò)的性能表現(xiàn)，如更長的周期時(shí)間，更低的填充速率。一個(gè)網(wǎng)絡(luò)中的節(jié)點(diǎn)可以是一個(gè)物理位置、子網(wǎng)絡(luò)，或只是一個(gè)操作過程，而聯(lián)系代表物料流通。采用任務(wù)隊(duì)列分解策略來分析改進(jìn)性能得主要措施和方法，用于輸入流的聚合。然而，大多數(shù)的研究都集中在物流體系上的單一階段或單一產(chǎn)品。 (3) Assembly sites which assemble the ponents into semifinished products or finished goods。 Ming Dong Received: 15 October 2021 /Accepted: 6 March 2021 /Published online: 31 March 2021 SpringerVerlag London Limited 2021 Abstract Manufacturing logistics chains consist of plex interconnections among several suppliers, manufacturing facilities, warehouses, retailers and logistics providers. Performance modeling and analysis bee increasingly more important and difficult in the management of such plex manufacturing logistics works. Many research studies have developed different methods to solve such problems. However, most of the research focuses on logistics systems with either a single stage or single type of product. In the real world, industries always involve multiple stages and produce multiple types of products at one stage. This paper is geared toward developing a new methodology by bining multiclass queueing works and inventory models for the performance analysis of multiproduct manufacturing logistic chains. A work of multiclass inventory queue models is presented for the performance analysis of a serial multistage manufacturing logistics chain in which multiple types of products are produced at each stage. A job queue deposition strategy is employed to analyze the major performance measures and an approach for aggregating input streams and separating output streams is proposed to link all the sites or nodes in the logistics chain together. Numerical results show that the proposed method is effective for the application examples. Keywords Multiclass queueing works .Inventory models .Multistage manufacturing logistic chains . Aggregation . Separation 1 Introduction A manufacturing logistic chain can be viewed as a work of suppliers, manufacturing sites, distribution centers, and customer locations, through which ponents and products flow. A node in a work can be a physical location, a subwork, or just an operation process, while links represent material (ponents or products) flow. These works find si
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