• Refine Query
  • Source
  • Publication year
  • to
  • Language
  • 6
  • 6
  • 1
  • 1
  • 1
  • 1
  • Tagged with
  • 12
  • 12
  • 12
  • 6
  • 5
  • 5
  • 5
  • 5
  • 5
  • 3
  • 3
  • 3
  • 3
  • 2
  • 2
  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
11

無線點對點合理資訊交易模型達成破壞性行銷之研究

謝儒鋒, Hsieh,Ju Feng Unknown Date (has links)
在可預見之未來無線點對點的世界裡,資訊交易就如同現實世界人與人間的交易模式,需考量到交易資訊的成本、價值與人際關係衡量之因素;傳統廣告行銷的效率問題也待創新的資訊交易平台來解決。本研究提出的資訊交易模型,以人性考量為基礎,在各種不同情境下,動態衡量資訊成本、價值與使用者間關係,透過助理軟體,協助加入資訊交易平台之個體,以更便利方式進行資訊交易,預期讓交易結果更貼近使用者的需求;而企業方面也能透過點與點之間快速傳遞資訊的特性,預期以更低成本、更高效率,完成商務行銷目的,達到破壞性行銷之目標。 / This paper presents a novel ambient e-service aiming at distributed marketing through sensible bartering in foreseeable wireless Peer-to-Peer (WP2P) environments. A variety of influential factors (e.g., cost, value, relationship) are proposed and formalized for empowering the bartering mechanism, unfolding a rich arena of ambient distributed trading and a disruptive paradigm of e-marketing.
12

複迴歸係數排列檢定方法探討 / Methods for testing significance of partial regression coefficients in regression model

闕靖元, Chueh, Ching Yuan Unknown Date (has links)
在傳統的迴歸模型架構下,統計推論的進行需要假設誤差項之間相互獨立,且來自於常態分配。當理論模型假設條件無法達成的時候,排列檢定(permutation tests)這種無母數的統計方法通常會是可行的替代方法。 在以往的文獻中,應用於複迴歸模型(multiple regression)之係數排列檢定方法主要以樞紐統計量(pivotal quantity)作為檢定統計量,進而探討不同排列檢定方式的差異。本文除了採用t統計量這一個樞紐統計量作為檢定統計量的排列檢定方式外,亦納入以非樞紐統計量的迴歸係數估計量b22所建構而成的排列檢定方式,藉由蒙地卡羅模擬方法,比較以此兩類檢定方式之型一誤差(type I error)機率以及檢定力(power),並觀察其可行性以及適用時機。模擬結果顯示,在解釋變數間不相關且誤差分配較不偏斜的情形下,Freedman and Lane (1983)、Levin and Robbins (1983)、Kennedy (1995)之排列方法在樣本數大時適用b2統計量,且其檢定力較使用t2統計量高,但差異程度不大;若解釋變數間呈現高度相關,則不論誤差的偏斜狀態,Freedman and Lane (1983)、Kennedy (1995) 之排列方法於樣本數大時適用b2統計量,其檢定力結果也較使用t2統計量高,而且兩者的差異程度比起解釋變數間不相關時更加明顯。整體而言,使用t2統計量適用的場合較廣;相反的,使用b2的模擬結果則常需視樣本數大小以及解釋變數間相關性而定。 / In traditional linear models, error term are usually assumed to be independently, identically, normally distributed with mean zero and a constant variance. When the assumptions cannot meet, permutation tests can be an alternative method. Several permutation tests have been proposed to test the significance of a partial regression coefficient in a multiple regression model. t=b⁄(se(b)), an asymptotically pivotal quantity, is usually preferred and suggested as the test statistic. In this study, we take not only t statistics, but also the estimates of the partial regression coefficient as our test statistics. Their performance are compared in terms of the probability of committing a type I error and the power through the use of Monte Carlo simulation method. Situations where estimates of the partial regression coefficients may outperform t statistics are discussed.

Page generated in 0.0723 seconds