【正文】 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.。Originally, this world, can produce a chemical reaction to an event, in addition to resolutely, have to do, and time.　　原來，這個(gè)世界上，對某個(gè)事件能產(chǎn)生化學(xué)反應(yīng)的，除了非做不可的堅(jiān)決，還有，時(shí)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。總覺得自己自己似乎應(yīng)該去做點(diǎn)什么，或者寫點(diǎn)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.CSKA said they were surprised and disappointed by Toure39。s 21 win.Michel Platini, president of European football39。for the racist behaviour of their fans durings about how he felt and I would like to speak to him first to find out what his experience was.Uefa hass 150th anniversary celebrations and will attend City39。Employment tribunals.The (lack of) air up there Watch mCayman Islandsbased Webb, the head of Fifa39。To find your nearest CAB, including those that give advice by , click ona damagesbased agreement, you should make sure you39。t charge you more than 35% of your pensation Further help.If you are being represented by a solicitor at the tribunal, they may ask you to sign an agreement where you pay their fee out of your pensation if you win the case. This is known as aagainst the disciplinary action your employer has taken against you. However, if you win your case, the tribunal may reduce any pensation awarded to you as a result of your failure to appeal.Remember that in most cases you must make an application to an employment tribunal within three months of the date when the event you are plaining about happened. If your application is received after this time limit, the tribunal will not usually accept it.If you are worried about how the time limits apply to you, take advice from one of the organisations listed undert your employer dismisses you and you think that you have been dismissed unfairly.For more information about dismissal and unfair dismissal, see you don39。論文落筆，如釋重負(fù)，但“路漫漫其修遠(yuǎn)兮，吾將上下而求索”。最后，謹(jǐn)以此稚嫩的論文獻(xiàn)給所有關(guān)心和幫助過我的老師、親人、同學(xué)、和朋友們。還有我愛的家人——我永遠(yuǎn)的支持者，正是在你們殷切目光的注視下，我才一步步的完成了在外求學(xué)生涯。感謝張老師悉心的教誨、嚴(yán)謹(jǐn)?shù)闹螌W(xué)風(fēng)格和淵博的學(xué)識，這是鞭策我不知疲倦探究問題的力量源泉；更要感謝先生的學(xué)術(shù)遠(yuǎn)見，拓展了我的視野和研究思路。一路走過來，在感受苦楚和艱辛的同時(shí)也沐浴關(guān)愛和溫馨。他淵博的知識、開闊的視野和敏銳的思維給了我深深的啟迪。本文是在張曉宇老師精心指導(dǎo)和大力支持下完成的。大學(xué)四年的本科學(xué)習(xí)，成本與效益是如此的不成比例，令人汗顏。因此對單片機(jī)溫度控制系統(tǒng)的研究有重要目的和意義。由于時(shí)間比較緊，本系統(tǒng)還有許多可以改進(jìn)和拓展的地方，比如在系統(tǒng)中加上散熱裝置，如風(fēng)扇等，這樣可以在當(dāng)鍋爐內(nèi)的溫度高于所要求或所設(shè)定的溫度時(shí)，啟動(dòng)風(fēng)扇進(jìn)行降溫，則控制的效果會更好；另外，還可以在本系統(tǒng)的基礎(chǔ)上利用組態(tài)軟件進(jìn)一步實(shí)現(xiàn)更直觀的實(shí)時(shí)監(jiān)控。用單片機(jī)控制的鍋爐溫度控制系統(tǒng)不僅可以實(shí)現(xiàn)溫度的控制，而且還能方便的實(shí)現(xiàn)其它功能，例如：鍵盤和顯示、報(bào)警等功能。當(dāng)鍋爐內(nèi)實(shí)際溫度達(dá)到所設(shè)定的上限值時(shí)，系統(tǒng)也會進(jìn)行聲光報(bào)警。本文設(shè)計(jì)的鍋爐溫度控制系統(tǒng)可以實(shí)現(xiàn)如下功能：（1）利用功能按鍵分別實(shí)現(xiàn)對溫度的設(shè)定，包括設(shè)定滿足工藝要求的特定溫度值、鍋爐正常工作所能承受的最高和最低溫度值等；（2）利用數(shù)碼管顯示當(dāng)前鍋爐內(nèi)溫度、所設(shè)定的上下限溫度。在通過對三種方案進(jìn)行對比之后，我選擇用單片機(jī)設(shè)計(jì)的溫度系統(tǒng)。} 即將結(jié)束了為期三個(gè)月的畢業(yè)設(shè)計(jì)，我深刻感受到自身知識的缺乏，同時(shí)，在整個(gè)設(shè)計(jì)過程中我也感受到自身知識的進(jìn)步，特別是在單片機(jī)控制系統(tǒng)方面。 if(xqamp。Delay(5)。P0=LEDData[d*10%10%10%10]。smgk=0。smgk=1。 //顯示小數(shù)點(diǎn)smgd=0。smgd=1。P0=0Xfb。Delay(5)。P0=LEDData[d*10%10%10/10]。smgk=0。smgk=1。 //顯示十位smgd=0。smgd=1。P0=0xfd。Delay(5)。P0=data1[d*10/1000]。 smgk=0。 //數(shù)碼管不顯示 } } 顯示電路及報(bào)警電路子程序流程圖設(shè)計(jì)圖64 顯示電路流程圖設(shè)計(jì)顯示電路C語言源代碼如下：/**************LED顯示子程序***************/void Display_Result(int d) //數(shù)值顯示{smgk=1。 P0=0xff。 key=5。 } if(key5==0) // 按下鍵時(shí)無任何顯示，返回關(guān)閉數(shù)碼顯示 { delay(10)。 if(key4==0) {while(!key4)。 key=3。 } if(key3==0) { delay(10)。 if(key2==0) {while(!key2)。 //確認(rèn)按鍵被釋放 key=1 。鍵盤子程序C語言源代碼如下：/*********鍵盤掃描子程序********/void keyscan(){ if(key1==0) // 判斷按鍵一是否被按下 { delay(10)。 //數(shù)據(jù)送顯示 } }圖63 按鍵子程序流程圖設(shè)計(jì)該部分共五個(gè)按鍵，分別是溫度、壓力、液位、流量和返回，按下第一個(gè)鍵，數(shù)碼管將會停止循環(huán)掃描，顯示出此刻的溫度值，相應(yīng)的按下第二個(gè)鍵，數(shù)碼管將會顯示出此刻的壓力值，按下第三個(gè)鍵，數(shù)碼管顯示出此刻的液位值，按下第四個(gè)鍵，數(shù)碼管將會顯示出此刻的流量值。 //允許讀取位 n=P1。 while(EOC==0)。 //通道選擇 P21=s[1]。ST=0。OE=0。 s[i]=j。0x01==0x01) j=1。i3。} //執(zhí)行鍵盤掃描 m=key。 uchar n。基于考慮這種考慮，在軟件設(shè)計(jì)中，設(shè)置了四次采樣，如果四次采樣的值不變，或者變化很小，單片機(jī)才將此信號當(dāng)成正常待轉(zhuǎn)換信號，如果四次采樣的信號出現(xiàn)很大的偏差，對于溫度這樣的大慣性參數(shù)，不會在很短的時(shí)間內(nèi)出現(xiàn)大的變化，單片機(jī)會取消此大偏差信號，進(jìn)行下一次采樣。 Adcon()。 //允許串口中斷 TR1=1。 TI=RI=0。 //波特率不加倍 TH1=0XFD。 //T1工作于模式2 SCON=0X50。}/*********主程序**********/ void main(){ P0=0X00。i0。i0。/*****延時(shí)子程序*****/void Delay(uint x){ uchar i。 sbit P22=P2^2。sbit P20=P2^0。 sbit key4=P2^6。 sbit key2=P2^4。 sbit PM=P3^4。 sbit EOC=P3^3。//段選sbit smgk=P3^1。主程序的C語言源代碼如下：includedefine uchar unsigned chardefine uint unsigned intuint s[ ]。 圖61 主程序流程圖設(shè)計(jì)主程序的設(shè)計(jì)從初始化各個(gè)模塊開始，然后通過AD0809完成對信號的采集與處理，將模擬信號變?yōu)閿?shù)字信號以后，所采集的信號輸入單片機(jī)，通過單片機(jī)判斷所采集的數(shù)據(jù)和預(yù)設(shè)的數(shù)據(jù)相比較，看是否所采集的數(shù)據(jù)超過了預(yù)設(shè)的數(shù)據(jù)，若超出預(yù)設(shè)數(shù)據(jù)，則程序直接跳入報(bào)警電路，鍋爐停止工作，人工對鍋爐實(shí)行控制，若沒有越界，則程序在掃描鍵盤，看鍵盤是否有按下，若鍵盤按下，則做相應(yīng)的處理，再通過判斷鍵盤的返回鍵作出判斷，若返回鍵按下，則返回流程圖的鍵盤顯示部分，再次做出判斷。圖55 獨(dú)立按鍵與報(bào)警電路模塊由于顯示電路采用的是循環(huán)掃描，所以能夠?qū)崟r(shí)的顯示出任何時(shí)刻鍋爐的水位、蒸汽溫度、爐膛壓力和汽包水位的流量，如果我們需要具體觀察某個(gè)參數(shù)的值，可以通過獨(dú)立按鍵來實(shí)現(xiàn)，獨(dú)立按鍵共五個(gè)按鍵，分別對應(yīng)著溫度、壓力、液位、流量和返回按鍵。本設(shè)計(jì)的主要控制量為水位、蒸汽溫度和爐膛負(fù)壓