Re: 看paper
※ 引述《cyshen (喔喔喔)》之銘言：
: 老師發了一份paper要我們回去讀
: 光是其中一小段
: 就讓我百思不得其解
: 想跟各位請教一下
: 原文如下:
: In speaking of the “crucial assumption” of a theory, we are trying to state
: the key elements of the abstract model. There are generally many different ways
: of describing the model completely-many different sets of “postulates” which
: both imply and are implied by the model as a whole. These are all logically
: equivalent: what are regarded as axioms or postulates of a model from one point
: of view can be regarded as theorems from another, and conversely. The
: particular “assumptions” termed “crucial”are selected on grounds of their
: convenience in some such respects as simplicity or economy in describing the
: model, intuitive plausibility, or capacity to suggest, if only by implication,
: some of the considerations that are relevant in judging or applying the model.
: 以下是我努力分段翻譯的結果:
: In speaking of the “crucial assumption” of a theory, we are trying to state
: the key elements of the abstract model.
: =>談到一個理論的關鍵假設時，我相信我們一直在試圖去陳述抽象模型的關鍵元素。
: 翻成中文之後
: 還是霧颯颯
: 這一段話到底意所何指?
: 我試著去理解
: 比如說談到消費者理論的理性假設時
: 教科書的作者就會用某些方法來陳述模型的關鍵元素
: 比如說凸向原點的無異曲線之類的
: 目的是讓讀者了解
: 關鍵假設會造成模型中什麼樣的關鍵元素
: 不知道我這樣理解對不對?
element你一直當成"元素"所以會誤解
: There are generally many different ways of describing the model completely-many
: different sets of “postulates” which both imply and are implied by the model
: as a whole.These are all logically equivalent: what are regarded as axioms or
: postulates of a model from one point of view can be regarded as theorems from
: another, and conversely.
: =>通常有很多完整描述模型的方法－普遍來說，許多不同的假設組隱含了模型本身也被模
: 型所隱含。這些都是邏輯上相等的：那些從某個觀點被視為公理和假設的，能夠從另一
: 個觀點被視為定理，反之亦然。
: 這一段也不太懂在講什麼
: 感覺上只是在說:假設推導出模型,模型也包含了假設
以上在講模型與假設之間的關係
: 不過後面的:what are regarded as axioms or postulates of a model from one point
: of view can be regarded as theorems from another, and conversely.
: 就真的看不懂了...
: The particular “assumptions” termed “crucial”are selected on grounds of
: their convenience in some such respects as simplicity or economy in describing
: the model, intuitive plausibility, or capacity to suggest, if only by
: implication, some of the considerations that are relevant in judging or
: applying the model.
: =>那些被稱作”關鍵”的特別假設，是以一些像是如下的方面為由被選出的：在描述模型
: 上很簡單或是很節省、直覺上似乎有道理的，或是有暗示的能力，假如只是藉由暗示，
: 一些要考慮的事項就會和判斷以及應用模型有關。
: 這段應該是說
: 那些關鍵的假設是怎麼被選擇的
: 比如說能夠簡化模型
: (這裡的economy要怎麼翻 我也搞不太清楚 翻成節省也怪怪的)
: 或是直覺上似乎合理
: 亦或是有暗示的能力
: (為什麼不選有明示能力的假設?)
: 最後的if only by implication, some of the considerations that are relevant in
: judging or applying the model.
以上文章沒時間逐一翻譯 以下講個大概
整段是在模型的假設
模型推導之前要先做假設
但是模型是把整個要分析的現象簡化
而要把現象簡化就要先做假設
但是假設是無法完全將現象簡化成模型的
所以假設只會設定最重要的部分
假設做好了 模型便開始推導
而推倒的過程中 如果你仔細研究
會發現幾乎所有的模型都沒有把所有的假設都設定完成
但是沒把非關鍵性的假設寫出來並不會影響模型的推導
事實上你在看模型推倒的時候
會自然而然的把一些不具非關鍵而作者也沒寫出來的假設加入在你的閱讀過程中
而這便是模型所隱含的假設
其他請自己在讀一遍 應該就懂了
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