晝夜無間 詠時辰
請您來觀賞本院典藏，繪有小天使圖案的宮廷珍寶--懷錶佩飾。 💘
👩💻
十九世紀「播喴」畫琺瑯鑲珠懷錶
長4.66公分 厚1.07公分 徑3.32公分
西洋鐘錶自明清之際傳入中國後，持續受到宮廷及仕宦工商階層的重視與喜愛，成為近代中西文化交流的重要媒介之一。設計精巧，可供隨身佩戴的懷錶，不僅具有計時功能，也是彰顯身份，可供玩賞收藏的貴重物品。
錶面採白色琺瑯地，羅馬字雙套三針式，錶殼內鑄刻皇冠形圈飾，內有中文「播喴」二字，係瑞士製錶家族Bovet 的中譯廠牌名稱。
此組對錶的琺瑯圖案，以三名模樣可愛的小愛神邱比特為主體，其中一名雙手高舉果實滿盈的花籃，身繞飄帶自天而降，另二名坐臥相依，四周環繞盛開的紅白玫瑰與姿態各異、筆觸生動的多色花卉。👨💻
來展場走一趟，親眼目睹，讓您喜逐顏開。
更多訊息：
https://theme.npm.edu.tw/selection/Article.aspx?sNo=04009166
https://theme.npm.edu.tw/exh103/a_carland_of_treasures/ch/ch02.html
👩💻
Pair of "Bovet" pocket watches with pearls and painted enamel, 19th century
Ever since they were brought to China during the Ming and Qing eras, western clocks and watches were held in high esteem and much beloved by the imperial court, government officials, and merchant class, and they eventually became an important medium for cultural interaction between China and the west during the modern era. Pocket watches, with their intricate design and wearable nature, became not only a convenient instrument for telling the time, but also a status symbol and precious collectable.
The watch face is made of white enamel, with two sets of Roman numerals and three hands. On the inner side of the watch case, a circular crown marking can be found, within which the Chinese characters “Bo Wei” spell out the Chinese translation for “Bovet”, the Swiss family of luxury watchmakers.
💘The enamel imagery of this pair of pocket watches centers on three adorable cupids, one of which holds aloft in both hands a floral basket overflowing with fruit, while a sash weaves around his body and drapes from the sky, while the other two sit nestled against each other. The cupids are surrounded by red and white roses in full bloom, as well as other vividly depicted flowers of many forms and hues. Wash techniques are employed to give an air of soft beauty to the clouds and sky in the background, and the rich light and dark contrasts lend a three-dimensional effect to the hair and skin of the cupids, as well as the surrounding flowers and leaves.👨💻
More information:
https://theme.npm.edu.tw/selection/Article.aspx?sNo=04009166&lang=2#inline_content_intro
https://theme.npm.edu.tw/exh103/a_carland_of_treasures/en/en02.html
https://theme.npm.edu.tw/exh103/a_carland_of_treasures/ja/ja02.html
#故宮典藏精選 #NPM_Selections
#NPM_Open_Data
#當期展覽_院藏珍玩精華
#Current_Exhibits_Masterpieces_of_Precious_Crafts_in_the_Museum_Collection
selection effect中文 在 [討論] 什麼是選擇性偏差(selection bias)? - 看板NCKU-PH98 的推薦與評價
在這篇裡面要跟大家說明什麼是選擇性偏差(selection bias)?
在上一篇裡面有跟大家提到，我們是從來源將偏差分類的
其中選擇性偏差是因為研究對象的選取不當所造成
像是１．研究組與對照組的可比較性差
２．研究各案的抽樣架構選擇錯誤
３．研究對象追蹤漏失或沒有回應(loss to follow up)
也就是說 當目標族群中不同疾病與暴露狀況下的個案 與被選為研究族群的比例不盡相同
這時候就有可能產生選擇篇差
我們來看看郭浩然老師上課時所給我們的定義(A Dictionary of Epidemiology)
Error due to systematic differences in characteristics between those who
are selected for study and those who are not.
一個因為系統性所導致的錯誤(Error)造成了被選進來做研究的人與沒有被選進來是不同的
也就是研究對象的選取不當 重點就在不同
￣￣
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那選擇性偏差會造成什麼後果呢？
我們一樣看看郭浩然老師給的定義(A Dictionary of Epidemiology)
“Selection bias invalidates conclusions and generalization that might
otherwise be drawn from such studies.”
選擇性偏差所造成最嚴重的後果就是會使研究是無效的，也就是說你花費這麼多的時間
浪費了這麼多的金錢，結果做出來的研究是沒效的
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那選擇性偏差可以補救嗎？
我們繼續看看郭浩然老師給的定義
selection bias is an error in study design or execution
-may be prevented by study design
-cannot be solved by analysis of the data collected in the study once it
occurred
選擇性偏差只能從實驗的設計來解決
並且選擇性偏差是無法事後補救的就算妳統計很強也一樣(學姊我沒針對妳XD)
希望這篇對大家有所幫助 接下來會跟大家討論什麼訊息性偏差(imformation bias)?
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※ 編輯: danail 來自: 218.164.227.189 (01/16 16:56)
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