【正文】 冷鏈物流，主要是指一些生鮮類產(chǎn)品在生產(chǎn)、儲藏運輸、銷售到消費前的各個環(huán)節(jié)中始終處于規(guī)定的低溫環(huán)境下，以保證產(chǎn)品質(zhì)量，減少產(chǎn)品損耗的一個流程，涵蓋了運輸、搬運、裝卸等過程。近幾年，不斷出現(xiàn)的食品安全問題，如“三聚氰胺”、“瘦肉精”、“增白饅頭”等事件，向人們敲了醒鐘，提高和加強食品質(zhì)量，降低食品安全風(fēng)險是非常重要的課題。 Finally, by A cold chain logistics enterprise to set up before the distribution process of deposition of Petri net model, using the relationship between subnets, determine the link of this model can be optimized, reasonable measures are proposed to improve and enhance the running efficiency of subnet to achieve the optimization of the process.Key words: Cold Chain Distribution； Petri Net； Logistics； Process Optimization朗讀顯示對應(yīng)的拉丁字符的拼音 Again, details of current and distribution process in the link and some representative distribution enterprise carried on the elaboration of the processing steps, with A cold chain logistics enterprises as the research example, analysis of the current status quo, respectively from the coldchain logistics distribution mode of the enterprise and A parative analysis of cold chain logistics characteristics and superiority, coldchain logistics distribution mode of A enterprise distribution process analysis in three aspects。s life safety, food quality safety and social stability to the country development plays an important role. From a logistics point of view, to shorten the time of cold chain logistics distribution process, can effectively reduce the risk of food spoilage. Because of the cold chain food cold chain in the distribution of protection is weak, so this article from the perspective of process optimization study of the coldchain distribution process. On logistics process modeling method has a lot of kinds, because Petri net has rigorous mathematical definition and analysis method, so this paper selected using Petri net modeling of cold chain logistics distribution process.In this paper, first of all, this paper carried out the research on the background and significance are expounded, and the current research situation of the coldchain distribution logistics and Petri net modeling in the field of logistics and distribution in the field of application made certain overview, on the basis of this puts forward the research content of this paper, the technical route and the main research method。關(guān)鍵詞:冷鏈配送； Petri網(wǎng)； 物流企業(yè)； 流程優(yōu)化ABSTRACTWith the continuous development of economy, the continuous improvement of the market economy, the continuous improvement of social life, but their living standards and standards have been greatly improved, to maintain the item39。目前對物流流程建模的方法有很多種，因為Petri網(wǎng)具有嚴(yán)謹(jǐn)?shù)臄?shù)學(xué)定義和分析方法，所以本文選擇利用Petri網(wǎng)對冷鏈物流企業(yè)配送流程進行建模。從物流角度看，縮短冷鏈物流配送流程的時間，能夠有效地降低食品變質(zhì)的風(fēng)險。因此，本課題開展對冷鏈配送問題的研究，可以預(yù)見這種研究勢必會對配送行業(yè)是非常有意義的。Petri網(wǎng)理論及其在冷鏈物流企業(yè)配送流程優(yōu)化中的應(yīng)用PETRI NET THEORY AND APPLICATION ON THE COLD CHAIN LOGISTICS ENTERPRISE DISTRIBUTION PROCESS OPTIMIZATION專 業(yè)： 姓 名： 指 導(dǎo) 教 師：申請學(xué)位級別： 論文提交日期： 學(xué)位授予單位： 44 / 50摘 要隨著經(jīng)濟的不斷發(fā)展，市場經(jīng)濟的不斷完善，社會生活的不斷提高，然們生活水平和水準(zhǔn)都得到了很大程度的提高，來維持物品的優(yōu)良品質(zhì)成為了世人關(guān)注的焦點，也就是如何使一些在一年書過程中對環(huán)境、溫度有比較苛刻的要求，在這種條件下，一種新生的物流模式應(yīng)運而生冷鏈物流。冷鏈物流的興起，帶動了學(xué)術(shù)界對于這個新興行業(yè)的研究，它不僅意味著一種配送方式的革新，也給運輸行業(yè)帶來了新的血液，從而帶動新的配送方式的發(fā)展，提高其效率，降低運輸成本，提高收益，建立健全并完善保持食品的品質(zhì)。食品問題關(guān)系著所有人的生命安全，食品質(zhì)量的安全對國家和社會的穩(wěn)定發(fā)展起著重要作用。因為冷鏈?zhǔn)称吩谂渌椭械睦洳丨h(huán)節(jié)受到的保護較為薄弱，所以本文從流程優(yōu)化的角度來研究冷鏈配送的流程。本文首先對本文開展此次研究的背景和重要意義進行了闡述，以及目前的冷鏈配送物流的研究現(xiàn)狀和Petri網(wǎng)建模在物流領(lǐng)域乃至配送領(lǐng)域的應(yīng)用情況做了一定的概述，在此基礎(chǔ)上提出了本論文的研究內(nèi)容、技術(shù)路線和主要研究方法；然后，對目前的冷鏈物流理論進行了闡述，包括冷鏈和冷鏈物流的概念，以及Petri網(wǎng)的理論基礎(chǔ)進行了詳細(xì)的介紹，從概念出發(fā)，引出了它的幾種定義，論述了Petri網(wǎng)的基本性質(zhì)和特性分析方法；再次，詳細(xì)對當(dāng)前與配送過程中的環(huán)節(jié)以及具有代表性的一些配送企業(yè)的處理環(huán)節(jié)進行了論述，以冷鏈物流A企業(yè)作為研究實例，分析其目前現(xiàn)狀，分別從冷鏈物流A企業(yè)的配送模式及對比分析，冷鏈物流企業(yè)配送模式特點及優(yōu)越性、冷鏈物流A企業(yè)配送流程環(huán)節(jié)分析三方面展開論述；接著，結(jié)合冷鏈物流A企業(yè)配送流程環(huán)節(jié)分析，應(yīng)用Petri網(wǎng)理論，完成的對冷鏈物流企業(yè)的配送流程建模，分別闡述Petri網(wǎng)建模的基本過程、建立的模型表述、對所建立的配送企業(yè)配送流程模型進行特性分析；最后，通過對之前建立的冷鏈物流A企業(yè)的配送流程的Petri網(wǎng)模型進行分解，利用子網(wǎng)間的關(guān)系，確定此模型中可優(yōu)化的環(huán)節(jié)，提出合理的措施，改善和提高各子網(wǎng)的運行效率來達(dá)到整個流程的優(yōu)化。s quality has bee the focus of attention of the world, that is, how to make some during a year have more stringent requirements on the environment, temperature, under this condition, a kind of new logistics mode arises at the historic moment cold chain logistics. The rise of cold chain logistics, drive the academia to study in this new industry, it means not only a kind of distribution mode innovation, also brought new blood to transport industry, thereby giving impetus to the development of a new mode of distribution, to improve the efficiency, reduce transportation costs, improve profitability, establish and perfect the keep food quality. Therefore, this topic in the study of coldchain distribution problem, can foresee this kind of research is bound to the distribution industry makes sense. Food problems relationships with all people39。 Then, the current theory of cold chain logistics, including cold chain and the concept of cold chain logistics, as well as the theoretical basis of Petri net has carried on the detailed introduction, starting from the concept, lead to a few of its definition, this paper discusses the basic proPetries and characteristics of Petri net analysis method。 Then, A bination of cold chain logistics distribution process link analysis, application of Petri net theory, pleted the distribution of cold chain logistics enterprise process modeling, respectively, the basic process of Petri net modeling, the model expression, distribution enterprise distribution process model of characteristic analysis。字典目 錄摘 要 IABSTRACT II1 緒論 1 選題背景和意義 1 選題背景 1 選題意義 2 研究現(xiàn)狀 4 冷鏈配送研究現(xiàn)狀 4 Petri網(wǎng)建模研究現(xiàn)狀 5 Petri網(wǎng)在冷鏈物流建模方面研究現(xiàn)狀 6 研究的主要內(nèi)容和技術(shù)路線 7 研究的主要內(nèi)容 7 技術(shù)路線 8 研究方法 92 冷鏈物流及Petri 網(wǎng)理論基礎(chǔ)知識 11 冷鏈物流理論 11 冷鏈的概念 11 冷鏈物流的概念和特點 12 Petri網(wǎng)理論基礎(chǔ)知識 14 Petri網(wǎng)概念和特點 14 Petri 網(wǎng)的基本性質(zhì)和特性分析方法 183 某冷鏈物流A企業(yè)配送流程現(xiàn)狀分析及存在的問題 22 冷鏈配送模式及其對比分析[23] 22 供應(yīng)商直接配送 22 企業(yè)自營物流模式 23 冷鏈物流企業(yè)配送 23 冷鏈物流企業(yè)配送模式特點及優(yōu)越性 24 某冷鏈物流A企業(yè)配送流程環(huán)節(jié)分析 25 總體流程 26 各個環(huán)節(jié) 284 基于Petri網(wǎng)的某冷鏈物流A企業(yè)配送流程建模 31 Petri網(wǎng)建?；具^程 31 31 31 Petri網(wǎng)建模步驟 32 某冷鏈物流A企業(yè)配送流程Petri網(wǎng)建模 32 冷鏈物流企業(yè)配送流程Petri網(wǎng)模型特性分析 345 某冷鏈物流A企業(yè)配送流程Petri網(wǎng)模型優(yōu)化 38 某冷鏈物流A企業(yè)配送流程Petri網(wǎng)模型分解 38 38 A企業(yè)配送流程Petri網(wǎng)子網(wǎng)查找與關(guān)系確定 39 某冷鏈物流A企業(yè)配送流程優(yōu)化 446 總結(jié)與展望 4