問題3: 腹部斷層影像中顯示的現象為何？臨床診斷為何？(20 %)

問題4:依據腹部電腦斷層影像中顯示的現象，請問接下來的處置為何及其風險及須注意 事項？ (15 %)

(後續發展)病人接受緊急腹部探查手術，手術中發現病患大小腸有三分之二都已壞死，家屬拒絕切除壞死腸道，腹部傷口縫合後病人立即送回加護病房進一步處理。第二天病人生命徵象不穩定，病人體溫34.5℃、血壓80/60 mm、心跳每分鐘140下、呼吸每分鐘26下，在呼 吸器VC/ACMV模式、潮氣量600ml、氧氣分壓0.5、末端吐氣正壓10cm-H2O使用下，動脈血氣體分析為 pH 7.256, PaO2 76 mm Hg, PaCO2 25 mm Hg。抽血檢驗結果：WBC 800/£L，PLT 3.2x10 3 /£L，Albumin 2.1 g/dL，Bun 38 mg/dL，creatinine 3 mg/dL，胸 部X光顯示雙側肺部浸潤。 問題5: 依上述病情，請問接下來的術後的處置為何，包括呼吸器的設定、止痛要及鎮靜 劑的使用及其預後？(15 %)

(a) Estimate the thermal equilibrium electron and hole concentrations, indicating which is the minority carrier. (5%)

(b) Find the position of Fermi level Ef with respect to the intrinsic Fermi level Ei, (i.e. Ef - Ei). (5%)

(c) The sample is used to make an integrated circuit resistor. The width and beight of the sample are 10 um and l um, respectively, and the length of the sample is 20 um. Calculate the resistance of the sample. (5%)

(a)(5%)

(b) .(5%)

(c) (5%)

Diodes and BJT 3.Please qualitatively plot the steady-state depletion region widths and the minority carrier concentration profiles in a pn junction under forward bias, zero bias, and reverse bias. Assume that the p-type doping concentration is larger than that of n-type. (15%)

4.The common-base current gain a of an NPN BJT can be expressed as a = γaTδ where a is the emitter injection efficiency factor, aT  is the base transport factor, andδ is the recombination factor. To have an a as large (close to 1) as possible, cach of these factors must be close to l as well. For these three factors, respectively, what about device design and/or operation bias must be done to make them large? (15%) If is increased, will a increase or decrease? Why? (5%)

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