HAYASHI Profile picture
Aug 31 5 tweets 2 min read
西門子電器 99% 中國貼牌 OEM

西門子半導體龍頭?我都唔係好知要搵搵料

哦咪 #FPGA 連帶 HDL/VHDL/EDA/Verilog etc.,我大學時(10年內)無西門子

DOD 最初 80s玩起,90s 開放俾民間用,Xinlix Honeywell Rockwell Texas Inst. 一早已有

簡單講電子產品發展咁快,大部分黎自於美帝武器系統

1
美國以外,最多既係英國

英國 Chord 同 Naim 更加用FPGA 黎造音響

至於 d 大工程,CLP 新 D1 D2 (Combined Cycle Gas Turbine) CCGT 我有份起,絕對唔係咩新科技,隨便數ABB GE 三菱 日立 Babcock Thales Schneider 間間都做到

好多時中標係商業同政治因素,鐵路亦係

2

#Engineering_pt_view
武器系統既話,我舉兩樣多國合作 project,Tonardo 同 EF-2000

德國既參與其實好少,最多既係英國,投產實用之後好多system upgrade 甚少係德國,而係英國做

法國中途退出另起爐灶

英法係德國之上

唯獨係潛艇,大部分機密唔公開,可能二戰 UBOAT 既關係都未定 (水面唔夠打先玩潛艇)
3
不過都係果句,大工程政治經濟因素居多

至於Leica/Zeiss,正正係神話化德國既代表,完全係吹大左

兩間野到 2022 都無防手震同自動對焦 (Leica 要Panasonic 幫手先得)

咪係一味吹「德鏡味」

車工業同日本一樣背後都係美國

簡單講,純機械野鋼水玻璃螺絲 gate/ball valve 等德國唔會差

4
英美加日等先進國家亦一樣得,我開頭都唔知,大把重型 crane 意大利西班牙造

當涉及一個系統,愈來愈複雜、電子化、自動化,英美先係大宗,之後到法國

歷史因素,我會話第一部現代定義既「電腦」係英國人破解德軍密碼既 Turing Machine

End

#Engineering_pt_of_view

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More from @usagifans

Apr 24
No

Chernobyl 好似一年都要寫兩次🤣

熄核反應堆後,係仲有餘溫,仍需要行泵 keep 住水循環進行冷卻,唔係會過熱 meltdown

所以熄核反應堆前,係要預早開定另一組 diesel generator 去行泵

當時 Chernobyl 有人諗,不如我用反應堆既餘溫去煲水,水蒸氣又推返個 stream turbine 有電去行泵

1
有泵行就有水循環冷卻*已經停左既反應堆*

用一個無 power 既 source 去推返佢自己,呢個 dead end loop 根本唔 work

唔係 wor,我只係推一陣,最多幾分鐘,可以遲d 開 diesel generator ,大家又慳返 d 油

咁可以捱幾耐?要 test 過先知!

Chernobyl 意外就係咁開始

2

#Engineering_pt_of_view
Chernobyl 其實唔係核爆,而係爆水管,爆出黎既水接觸過核燃料咁解

停唔到既煤炭機組,如水循環有問題,一樣會爆水管爆到上天

Again

發電機既運作,係長期既計劃,由設計建造到日常營運維修,係一環扣一環,唔會話有人諗到 d 野不如試下得唔得

Chernobyl 顯示既唔係核能危險,而係人既愚蠢

3
Read 4 tweets

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