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題 名 | 臺北市二十歲階層消費者對服裝消費行為之研究 |
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作 者 | 蔡明哲; 鄭雙慧; | 書刊名 | 華岡紡織期刊 |
卷 期 | 2:1 1995.03[民84.03] |
頁 次 | 頁61-70 |
分類號 | 496.34 |
關鍵詞 | 消費者; 消費行為; 人口統計變項; Consumer; Consum's behavior; Population statistics variable; |
語 文 | 中文(Chinese) |
中文摘要 | 土壤未飽和層中水流流動的一維控制方程式,Richard 氏方程式,乃一非線性偏 微分方程式。對於不同土壤層初始與邊界狀況,以數值方法來求解乃必然的方式。然而,數 值模式之建立過程需以可靠的方法如解析解或控制良好的實驗數據加以驗證。由於實驗控制 參數, 如均勻性等之不確定性太高, 因而單純條件下的解析解, Broadbridge and White (1988),乃用來驗證單步驟 Crank-Nicolson 法,所建立的數值模式。 在適當的△ t 與△ z 解析度下,四種不同入滲量與土壤乾濕差的測試例子中,再再顯示出數值解與解析解幾乎 相互重疊的精確性。相較而言,在解析解不存在的起始與邊界條件狀況數值解則顯得靈活許 多。 |
英文摘要 | Richard's equation, which describes one-dimensional flow motion in the unsaturated zone of groundwater, is a nonlinear partial differential equation. Therefore, numerical means are usually employed to solve for different soil and hydraulic conditions. Due to lack of experimental data under ideal control, analytical solution for special cases is preferred to verify the numerical results. Broadbridge's analytical soultion (1988) are plotted for four different cases of parameters and One Step Crank-Nicolson scherne is selected to solve Richard's equation under identical setting. It is found that the numerical results fit perfectly with the analytical ones in all cases. The numerical method is more flexible and adaptable in applying to cases with various initial and boundary conditions, in which analytical solutions are not available. |
本系統中英文摘要資訊取自各篇刊載內容。