• 沒有找到結果。

5.1 結論

1. 本研究基因演算法使用許多隨機的概念,以機率做為演算法則的依據,做廣度的搜 尋,能找出較好的路徑組合且增加其多樣化。

2. 本研究在建構完初始族群後,利用改善路線交錯的方式求得一個較好的母體,在時 間範圍內能搜尋到不錯解。

3. 在敏感度分析上,證實懲罰乘數和初始母體族群的大小會影響求解的品質,且呈現 正相關。

4. 使用基因演算法尋優,之後再利用路徑改善方法,可在合理的時間內找出不錯的路 徑組合。

5. 本研究的改善交錯方法能明顯降低總旅行成本。

6. 在合理的車輛數下,能夠有效降低違反時間窗顧客數。

5.2 建議

1. 可針對基因演算法,加入其他相關的機制,使其能在合理時間內求得最佳解。亦可 結合其他適合 VRPTW 的啟發式解法發展新的演算法,提高求解品質與效率。

2. 本研究假設距離和速度的比例是相同,但此情況和實際狀況不符,演算方法中若能 考量到實際上的車速,在實務上會更有貢獻。

3. 在第二階段改善法上,後續的研究可加入 or-opt、2-opt、2-opt*、1-1 節點交換或 1-0 交換等改善方法。

4. 未來研究可考慮即時路況系統與旅行時間,使物流業者可透過線上系統即時更新路 線,以減少旅行時間成本且可增加效率。

5. 未來研究可考慮多場站,更能符合實務業者的需求。

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簡歷

姓 名:陳綠茵 籍 貫:桃園縣

出生日期:72 年 9 月 17 日

電子郵件:green.tem95g@nctu.edu.tw 學 歷:

國立交通大學運輸科技與管理學研究所 東吳大學經濟學系

德明技術學院

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