【正文】 t. Baumgartner still will free fall at a speed that would cause you and me to pass out, and no parachute is guaranteed to work higher than 25,000 feet (7,620 meters). cause there 。ll be traveling fast, so despite the distance, it will not be like diving into the deep end of a pool. It will be like he is diving into the shallow end. Skydiver preps for the big jump When he jumps, he is expected to reach the speed of sound 690 mph (1,110 kph) in less than 40 seconds. Like hitting the top of the water, he will begin to slow as he approaches the more dense air closer to Earth. But this will not be enough to stop him pletely. If he goes too fast or spins out of control, he has a stabilization parachute that can be deployed to slow him down. His team hopes it39。突然想到那件藍格子襯衫；那些被折成各種各樣形狀的信紙；那段從街角深巷伊始的友誼；還有那場還沒有開始就宣告 了終結的邂逅計劃 …… 那些年那些天的非做不可，終于和青春一樣，都將在我們的人生中謝幕。 Have declared the end of the encounter that haven39。 Those were broken into various shapes of stationery。那些曾經(jīng)所謂的非做不可，只是青蔥年華里自己給自己注射的一支強心劑，或者說，是自以為是的精神寄托罷了。也曾經(jīng)好像已經(jīng)下定了決心去做某件事，但更多的時候是最后又打起了退堂鼓。s time, your ideas are always special to clear. Want, want, line is clear, as if nothing could shake his. Also once seemed to be determined to do something, but more often is he backed out at last. Dislike his cowardice, finally found that there are a lot of love, there are a lot of miss, like shadow really have been doomed. Those who do, just green years oneself give oneself an arm injection, or is a selfrighteous spiritual. 一個人的時候，自己的想法總是特別地清晰。 Originally, this world, can produce a chemical reaction to an event, in addition to resolutely, have to do, and time. 原來，這個世界上，對某個事件能產生化學反應的，除了非做不可的堅決，還有，時間。t want to give vent to out your inner voice can be in the high school children of the feelings in a period, but was eventually infarction when graduation party in the throat, later again stood on the pitch he has sweat profusely, looked at his thrown a basketball hoops, suddenly found himself has already can39。t really grow up, it seems is not so important。 The end of our life, and can meet many things really do? 而窮盡我們的一生，又能遇到多少事情是真正地非做不可？ During my childhood, think lucky money and new clothes are necessary for New Year, but as the advance of the age, will be more and more found that those things are optional?？傆X得自己自己似乎應該去做點什么，或者寫點什么。 May be back in the past, to oneself the paranoid weird belief disillusionment, these days, my mind has been very messy, in my mind constantly. Always feel oneself should go to do something, or write something. Twenty years of life trajectory deeply shallow, suddenly feel something, do it. 一字開頭的年齡已經(jīng)到了尾聲。s actions. PLC 在組合機床控制系統(tǒng)中的應用 32 CSKA said they were surprised and disappointed by Toure39。s 21 win. Michel Platini, president of European football39。s Premier League match at Chelsea on Sunday. I am going to be at the match tomorrow and I have asked to meet Yaya Toure, he told BBC Sport. For me it39。s antiracism taskforce, is in London for the Football Association39。t charge you more than 35% of your pensation if you win the case. If you are thinking about signing up for a damagesbased agreement, you should make sure you39。t agree with the disciplinary action your employer has taken against you ? your employer dismisses you and you think that you have been dismissed unfairly. For more information about dismissal and unfair dismissal, see Dismissal. You can make a claim to an employment tribunal, even if you haven39。以上問題如果加以解決，該系統(tǒng)將會更加完善。 由于時間精力有限，還有許多功能有待擴展、完善。 并 利用 觸摸屏 組態(tài)軟件 對組合機床 進行 了 實時監(jiān)控。本系統(tǒng)的組態(tài)環(huán)境如表 51所示。 系統(tǒng)環(huán)境的選取 對系統(tǒng)進行組態(tài)，并且對現(xiàn)場數(shù)據(jù)進行采集和連接，可以在 PC 上監(jiān)測到現(xiàn)場運行的情況，對現(xiàn)場進行遠程 實時地 監(jiān)控 [14]。 iFIX 提供真正的分布式、客戶 /服務器結構，為系統(tǒng)提供最大的可 延伸 性。此外，在主服務器和備用服務器同時啟動、運行時， iFIX 實現(xiàn)報警同步，避免對同一報警的重復響應。 iFIX 靈活的系統(tǒng)結構意味著： iFIX 不但可以滿足當前系統(tǒng)應用的需要，還可以在將來需要的時候隨時方便地擴展系統(tǒng)規(guī)模。 由于運用了直觀的圖形工具， iFIX 的用戶可以快速上手，簡單快捷地為他們的生產過程創(chuàng)建高性能的過程窗口。生產的關鍵信息可以通過 iFIX 貫穿從生產現(xiàn)場到企業(yè)經(jīng)理的桌面的全廠管理體系，以方便管理者做出更快速更高效的決策，從而獲得更高的經(jīng)濟效益 [13]。 iFIX 可以精確地監(jiān)視、控制生產過程，并優(yōu)化生產設備和企業(yè)資源管理。自動循環(huán)控制和手動控制的轉換程序如圖 45 所示 。 圖 43 鉆孔加工程序 攻螺紋程序 起動攻螺紋動力頭電動機 M4 正轉，攻螺紋滑臺開始前移，進行攻螺紋加工，當PLC 在組合機床控制系統(tǒng)中的應用 16 攻螺 紋滑臺到達終點時（終點限位 SQ7 動作），制動電磁鐵 DL 得電，攻螺紋動力頭制動， 秒后攻螺紋動力頭電機 M4 反轉，同時攻螺紋滑臺由控制凸輪控制使其自動后退，其梯形圖程序 如圖 44 所示 。 圖 42 原位指示程序 PLC 在組合機床控制系統(tǒng)中的應用 15 鉆孔加工程序 起動鉆孔動力頭電動機 M3，且由于凸輪電動機 M2 運轉，控制凸輪控制相應的液壓閥使鉆孔滑臺前移，進行鉆孔加工。 原位指示程序 系統(tǒng)通電之后，自動起動液壓泵電動機 M1。功能塊圖的圖形結構與數(shù)字電路的結構極為相似，功能塊圖中每個模塊有輸入和輸出端，輸出和輸入端的函數(shù)關系使用與、或、非、異或邏輯運算，模塊之間的連接方式與電路的連接方式基本相同。梯形圖可以看作是 PLC 的高級語言，幾乎不用去考慮系統(tǒng)內部的結構原理和硬件邏輯。 PLC 在組合機床控制系統(tǒng)中的應用 13 圖 41 組合機床功能流程圖 組合機床控制系統(tǒng)的軟件整體設計 PLC 控制程序采用 SIEMENS 公司提供的 STEP 7MicroWINV40 編程軟件開發(fā)。 組合機床控制系統(tǒng)的功能流程圖 根據(jù)組合機床控制功能要求，可見該控制完全按步進進行，所以采用步進指令編程最適合。 由此可知，該控制系統(tǒng)的設計選用了基本程序中的順序結構和模塊化程序來編寫系統(tǒng)軟件。 因此，每種工作方式下電動機 的動作選用順序機構控制。程序設計時常采用這種設計思想，因為各模塊具有相對獨立性，相互連接關系簡單，程序易于調試修改，特別是用于復 雜控制要求的生產過程 [15]。 模塊化程序：把一個總的控制目標程序分成多個具有明確控制任務的程序模塊，分別對其編寫和調試，最后組合成一個完成總任務的完整程序。 基本程序：既可以作為獨立程序控制簡單的生產工藝過程，也可以作為組合中的單元程序。 為減少輸入點，簡化