Writing essays and dissertations can be a major concern for overseas students studying at English-medium colleges and universities. Virtually all courses contain a large degree of written assessment and it is essential to ensure that your writing skills meet the necessary standard. Academic Writing is a new kind of writing course for all international students who have to write exams or coursework in English. This practical book thoroughly explains the writing process and covers all the key writing skills.
標簽： Academic writing
上傳時間： 2015-11-13
上傳用戶：blackbat
asp實現(xiàn)限制一個ip只能訪問一次的方法 <% '///////////////////////////////////////////////////// '// // '//作用：一個IP地址只允許訪問本頁一次 // '//引用：<!-- #include file="Check_Ip.asp" --> // '// // '///////////////////////////////////////////////////// 'Response.Charset = 936 '設(shè)置輸出編碼為簡體中文 'Response.Buffer = false '關(guān)閉緩沖區(qū) Dim Fso,ts,IpList,Cfs '設(shè)置Cookies函數(shù) Function SetCookie() Response.Cookies("IsBrow") = "Brow" Response.Cookies("IsBrow").Expires = Date+365 End Function '記錄IP地址函數(shù) Function WriteIp(FileName, IpAddress) Set Fso = Server.CreateObject("Scripting.FileSystemObject") Set ts = Fso.OpenTextFile(Server.MapPath(FileName),8,true) ts.WriteLine IpAddress ts.Close Set ts = Nothing Set Fso = Nothing End Function '讀取IP地址函數(shù) Function ReadIpList(FileName) Set Fso = Server.CreateObject("Scripting.FileSystemObject") If Not Fso.FileExists(Server.MapPath(FileName)) Then CreateFile("Iplist.txt") Exit Function End If Set ts = Fso.OpenTextFile(Server.MapPath(FileName)) Iplist = ts.ReadAll ts.Close Set ts = Nothing Set Fso = Nothing ReadIpList = Iplist End Function '創(chuàng)建文件函數(shù) Function CreateFile(FileName) Set Fso = Server.CreateObject("Scripting.FileSystemObject") Set Cfs = Fso.CreateTextFile(Server.MapPath(FileName)) Cfs.Close Set Cfs = Nothing Set Fso = Nothing End Function '關(guān)閉當前IE窗口函數(shù)(注:IE6下通過,其他瀏覽器未測試) Function CloseWindow() 'Response.Write "<script>window.location='javascript:window.opener=null;window.close();'</script>" Response.Redirect "http://www.baidu.com" End Function Ip = Request.ServerVariables("REMOTE_ADDR") '獲取瀏覽者IP地址 Cookie = Request.Cookies("IsBrow") '獲取當前Cookies 'Response.Write Cookie If Request.ServerVariables("HTTP_X_FORWARDED_FOR") <> "" Then Response.Write "本站不允許使用代理訪問" Response.End() Else If Cookie = "Brow" Then CloseWindow() Else If Instr(ReadIpList("Iplist.txt"),Ip) <>0 Then CloseWindow() Else WriteIp "Iplist.txt" , Ip End If SetCookie() End If End If %>
上傳時間： 2016-07-14
上傳用戶：helei0915
eeprom read/write
標簽： eeprom
上傳時間： 2016-12-20
上傳用戶：a88387281
PL0語言是與pascal類似的語言，但是比pascal語言的詞法、語法更加嚴格苛刻。 在PL0語言中，只有五種類型的單詞：關(guān)鍵字、用戶自定義標識符、數(shù)字、特殊符號以及非法標識符。 根據(jù)題目給出的PL0的文法，關(guān)鍵字只有如下幾個： Const——用來聲明常量； Var——用來聲明變量； Procedure——用來聲明過程； Begin——聲明過程的開始； End——聲明過程的結(jié)束； Ood——單目運算符，聲明為關(guān)鍵字； If——條件語句； Then——條件語句； Call——聲明調(diào)用函數(shù)； While——循環(huán)語句； Read——讀文件語句； Write——寫文件語句； 對于用戶自定義標識符應(yīng)該滿足：以字母開頭，其后是字母和數(shù)字的組合，即：字母（字母|數(shù)字）* 數(shù)字則是數(shù)字字符（0——9）組成的數(shù)字串； 特殊符號有如下幾個： +，-，*，/，=<>,<,>=,<=,:= 把關(guān)鍵字、算符和界符稱為語言固有的單詞，標識符、常量稱為用戶自定義的單詞。 為此設(shè)置三個全程量：SYM,ID,NUM。 SYM：存放每個單詞的類別，為內(nèi)部編碼的表示形式； ID:存放用戶所定義的標識符的值，即標識符字符串的機內(nèi)表示； NUM:存放用戶定義的數(shù)。
上傳時間： 2017-06-20
上傳用戶：lbxxx
/****************temic*********t5557***********************************/ #include <at892051.h> #include <string.h> #include <intrins.h> #include <stdio.h> #define uchar unsigned char #define uint unsigned int #define ulong unsigned long //STC12C2051AD的SFR定義 sfr WDT_CONTR = 0xe1;//stc2051的看門狗?????? /**********全局常量************/ //寫卡的命令 #define write_command0 0//寫密碼 #define write_command1 1//寫配置字 #define write_command2 2//密碼寫數(shù)據(jù) #define write_command3 3//喚醒 #define write_command4 4//停止命令 #define TRUE 1 #define FALSE 0 #define OK 0 #define ERROR 255 //讀卡的時間參數(shù)us #define ts_min 250//270*11.0592/12=249//取近似的整數(shù) #define ts_max 304//330*11.0592/12=304 #define t1_min 73//90*11.0592/12=83:-10調(diào)整 #define t1_max 156//180*11.0592/12=166 #define t2_min 184//210*11.0592/12=194 #define t2_max 267//300*11.0592/12=276 //***********不采用中斷處理:采用查詢的方法讀卡時關(guān)所有中斷****************/ sbit p_U2270B_Standby = P3^5;//p_U2270B_Standby PIN=13 sbit p_U2270B_CFE = P3^3;//p_U2270B_CFE PIN=6 sbit p_U2270B_OutPut = P3^7;//p_U2270B_OutPut PIN=2 sbit wtd_sck = P1^7;//SPI總線 sbit wtd_si = P1^3; sbit wtd_so = P1^2; sbit iic_data = P1^2;//lcd IIC sbit iic_clk = P1^7; sbit led_light = P1^6;//測試綠燈 sbit led_light1 = P1^5;//測試紅燈 sbit led_light_ok = P1^1;//讀卡成功標志 sbit fengmingqi = P1^5; /***********全局變量************************************/ uchar data Nkey_a[4] = {0xA0, 0xA1, 0xA2, 0xA3};//初始密碼 //uchar idata card_snr[4]; //配置字 uchar data bankdata[28] = {1,2,3,4,5,6,7,1,2,3,4,5,6,7,1,2,3,4,5,6,7,1,2,3,4,5,6,7}; //存儲卡上用戶數(shù)據(jù)(1-7)7*4=28 uchar data cominceptbuff[6] = {1,2,3,4,5,6};//串口接收數(shù)組ram uchar command; //第一個命令 uchar command1;// //uint temp; uchar j,i; uchar myaddr = 8; //uchar ywqz_count,time_count; //ywqz jishu: uchar bdata DATA; sbit BIT0 = DATA^0; sbit BIT1 = DATA^1; sbit BIT2 = DATA^2; sbit BIT3 = DATA^3; sbit BIT4 = DATA^4; sbit BIT5 = DATA^5; sbit BIT6 = DATA^6; sbit BIT7 = DATA^7; uchar bdata DATA1; sbit BIT10 = DATA1^0; sbit BIT11 = DATA1^1; sbit BIT12 = DATA1^2; sbit BIT13 = DATA1^3; sbit BIT14 = DATA1^4; sbit BIT15 = DATA1^5; sbit BIT16 = DATA1^6; sbit BIT17 = DATA1^7; bit i_CurrentLevel;//i_CurrentLevel BIT 00H(Saves current level of OutPut pin of U2270B) bit timer1_end; bit read_ok = 0; //緩存定時值,因用同一個定時器 union HLint { uint W; struct { uchar H;uchar L; } B; };//union HLint idata a union HLint data a; //緩存定時值,因用同一個定時器 union HLint0 { uint W; struct { uchar H; uchar L; } B; };//union HLint idata a union HLint0 data b; /**********************函數(shù)原型*****************/ //讀寫操作 void f_readcard(void);//全部讀出1~7 AOR喚醒 void f_writecard(uchar x);//根據(jù)命令寫不同的內(nèi)容和操作 void f_clearpassword(void);//清除密碼 void f_changepassword(void);//修改密碼 //功能子函數(shù) void write_password(uchar data *data p);//寫初始密碼或數(shù)據(jù) void write_block(uchar x,uchar data *data p);//不能用通用指針 void write_bit(bit x);//寫位 /*子函數(shù)區(qū)*****************************************************/ void delay_2(uint x) //延時,時間x*10us@12mhz,最小20us@12mhz { x--; x--; while(x) { _nop_(); _nop_(); x--; } _nop_();//WDT_CONTR=0X3C;不能頻繁的復(fù)位 _nop_(); } ///////////////////////////////////////////////////////////////////// void initial(void) { SCON = 0x50; //串口方式1,允許接收 //SCON =0x50; //01010000B:10位異步收發(fā),波特率可變,SM2=0不用接收到有效停止位才RI=1, //REN=1允許接收 TMOD = 0x21; //定時器1 定時方式2(8位),定時器0 定時方式1(16位) TCON = 0x40; //設(shè)定時器1 允許開始計時(IT1=1) TH1 = 0xfD; //FB 18.432MHz 9600 波特率 TL1 = 0xfD; //fd 11.0592 9600 IE = 0X90; //EA=ES=1 TR1 = 1; //啟動定時器 WDT_CONTR = 0x3c;//使能看門狗 p_U2270B_Standby = 0;//單電源 PCON = 0x00; IP = 0x10;//uart you xian XXXPS PT1 PX1 PT0 PX0 led_light1 = 1; led_light = 0; p_U2270B_OutPut = 1; } /************************************************/ void f_readcard()//讀卡 { EA = 0;//全關(guān),防止影響跳變的定時器計時 WDT_CONTR = 0X3C;//喂狗 p_U2270B_CFE = 1;// delay_2(232); //>2.5ms /* // aor 用喚醒功能來防碰撞 p_U2270B_CFE = 0; delay_2(18);//start gap>150us write_bit(1);//10=操作碼讀0頁 write_bit(0); write_password(&bankdata[24]);//密碼block7 p_U2270B_CFE =1 ;// delay_2(516);//編程及確認時間5.6ms */ WDT_CONTR = 0X3C;//喂狗 led_light = 0; b.W = 0; while(!(read_ok == 1)) { //while(p_U2270B_OutPut);//等一個穩(wěn)定的低電平?超時判斷? while(!p_U2270B_OutPut);//等待上升沿的到來同步信號檢測1 TR0 = 1; //deng xia jiang while(p_U2270B_OutPut);//等待下降沿 TR0 = 0; a.B.H = TH0; a.B.L = TL0; TH0 = TL0 = 0; TR0 = 1;//定時器晚啟動10個周期 //同步頭 if((324 < a.W) && (a.W < 353)) ;//檢測同步信號1 else { TR0 = 0; TH0 = TL0 = 0; goto read_error; } //等待上升沿 while(!p_U2270B_OutPut); TR0 = 0; a.B.H = TH0; a.B.L = TL0; TH0 = TL0 = 0; TR0 = 1;//b.N1<<=8; if(a.B.L < 195);//0.5p else { TR0 = 0; TH0 = TL0 = 0; goto read_error; } //讀0~7塊的數(shù)據(jù) for(j = 0;j < 28;j++) { //uchar i; for(i = 0;i < 16;i++)//8個位 { //等待下降沿的到來 while(p_U2270B_OutPut); TR0 = 0; a.B.H = TH0; a.B.L = TL0; TH0 = TL0 = 0; TR0 = 1; if(t2_max < a.W/*)&&(a.W < t2_max)*/)//1P { b.W >>= 2;//先左移再賦值 b.B.L += 0xc0; i++; } else if(t1_min < a.B.L/*)&&(a.B.L < t1_max)*/)//0.5p { b.W >>= 1; b.B.L += 0x80; } else { TR0 = 0; TH0 = TL0 = 0; goto read_error; } i++; while(!p_U2270B_OutPut);//上升 TR0 = 0; a.B.H = TH0; a.B.L = TL0; TH0 = TL0 = 0; TR0 = 1; if(t2_min < a.W/*)&&(a.W < t2_max)*/)//1P { b.W >>= 2; i++; } else if(t1_min < a.B.L/*a.W)&&(a.B.L < t1_max)*/)//0.5P //else if(!(a.W==0)) { b.W >>= 1; //temp+=0x00; //led_light1=0;led_light=1;delay_2(40000); } else { TR0 = 0; TH0 = TL0 = 0; goto read_error; } i++; } //取出奇位 DATA = b.B.L; BIT13 = BIT7; BIT12 = BIT5; BIT11 = BIT3; BIT10 = BIT1; DATA = b.B.H; BIT17 = BIT7; BIT16 = BIT5; BIT15 = BIT3; BIT14 = BIT1; bankdata[j] = DATA1; } read_ok = 1;//讀卡完成了 read_error: _nop_(); } } /***************************************************/ void f_writecard(uchar x)//寫卡 { p_U2270B_CFE = 1; delay_2(232); //>2.5ms //psw=0 standard write if (x == write_command0)//寫密碼:初始化密碼 { uchar i; uchar data *data p; p = cominceptbuff; p_U2270B_CFE = 0; delay_2(31);//start gap>330us write_bit(1);//寫操作碼1:10 write_bit(0);//寫操作碼0 write_bit(0);//寫鎖定位0 for(i = 0;i < 35;i++) { write_bit(1);//寫數(shù)據(jù)位1 } p_U2270B_CFE = 1; led_light1 = 0; led_light = 1; delay_2(40000);//測試使用 //write_block(cominceptbuff[4],p); p_U2270B_CFE = 1; bankdata[20] = cominceptbuff[0];//密碼存入 bankdata[21] = cominceptbuff[1]; bankdata[22] = cominceptbuff[2]; bankdata[23] = cominceptbuff[3]; } else if (x == write_command1)//配置卡參數(shù):初始化 { uchar data *data p; p = cominceptbuff; write_bit(1);//寫操作碼1:10 write_bit(0);//寫操作碼0 write_bit(0);//寫鎖定位0 write_block(cominceptbuff[4],p); p_U2270B_CFE= 1; } //psw=1 pssword mode else if(x == write_command2) //密碼寫數(shù)據(jù) { uchar data*data p; p = &bankdata[24]; write_bit(1);//寫操作碼1:10 write_bit(0);//寫操作碼0 write_password(p);//發(fā)口令 write_bit(0);//寫鎖定位0 p = cominceptbuff; write_block(cominceptbuff[4],p);//寫數(shù)據(jù) } else if(x == write_command3)//aor //喚醒 { //cominceptbuff[1]操作碼10 X xxxxxB uchar data *data p; p = cominceptbuff; write_bit(1);//10 write_bit(0); write_password(p);//密碼 p_U2270B_CFE = 1;//此時數(shù)據(jù)不停的循環(huán)傳出 } else //停止操作碼 { write_bit(1);//11 write_bit(1); p_U2270B_CFE = 1; } p_U2270B_CFE = 1; delay_2(560);//5.6ms } /************************************/ void f_clearpassword()//清除密碼 { uchar data *data p; uchar i,x; p = &bankdata[24];//原密碼 p_U2270B_CFE = 0; delay_2(18);//start gap>150us //操作碼10:10xxxxxxB write_bit(1); write_bit(0); for(x = 0;x < 4;x++)//發(fā)原密碼 { DATA = *(p++); for(i = 0;i < 8;i++) { write_bit(BIT0); DATA >>= 1; } } write_bit(0);//鎖定位0:0 p = &cominceptbuff[0]; write_block(0x00,p);//寫新配置參數(shù):pwd=0 //密碼無效:即清除密碼 DATA = 0x00;//停止操作碼00000000B for(i = 0;i < 2;i++) { write_bit(BIT7); DATA <<= 1; } p_U2270B_CFE = 1; delay_2(560);//5.6ms } /*********************************/ void f_changepassword()//修改密碼 { uchar data *data p; uchar i,x,addr; addr = 0x07;//block7 p = &Nkey_a[0];//原密碼 DATA = 0x80;//操作碼10:10xxxxxxB for(i = 0;i < 2;i++) { write_bit(BIT7); DATA <<= 1; } for(x = 0;x < 4;x++)//發(fā)原密碼 { DATA = *(p++); for(i = 0;i < 8;i++) { write_bit(BIT7); DATA >>= 1; } } write_bit(0);//鎖定位0:0 p = &cominceptbuff[0]; write_block(0x07,p);//寫新密碼 p_U2270B_CFE = 1; bankdata[24] = cominceptbuff[0];//密碼存入 bankdata[25] = cominceptbuff[1]; bankdata[26] = cominceptbuff[2]; bankdata[27] = cominceptbuff[3]; DATA = 0x00;//停止操作碼00000000B for(i = 0;i < 2;i++) { write_bit(BIT7); DATA <<= 1; } p_U2270B_CFE = 1; delay_2(560);//5.6ms } /***************************子函數(shù)***********************************/ void write_bit(bit x)//寫一位 { if(x) { p_U2270B_CFE = 1; delay_2(32);//448*11.0592/120=42延時448us p_U2270B_CFE = 0; delay_2(28);//280*11.0592/120=26寫1 } else { p_U2270B_CFE = 1; delay_2(92);//192*11.0592/120=18 p_U2270B_CFE = 0; delay_2(28);//280*11.0592/120=26寫0 } } /*******************寫一個block*******************/ void write_block(uchar addr,uchar data *data p) { uchar i,j; for(i = 0;i < 4;i++)//block0數(shù)據(jù) { DATA = *(p++); for(j = 0;j < 8;j++) { write_bit(BIT0); DATA >>= 1; } } DATA = addr <<= 5;//0地址 for(i = 0;i < 3;i++) { write_bit(BIT7); DATA <<= 1; } } /*************************************************/ void write_password(uchar data *data p) { uchar i,j; for(i = 0;i < 4;i++)// { DATA = *(p++); for(j = 0;j < 8;j++) { write_bit(BIT0); DATA >>= 1; } } } /*************************************************/ void main() { initial(); TI = RI = 0; ES = 1; EA = 1; delay_2(28); //f_readcard(); while(1) { f_readcard(); //讀卡 f_writecard(command1); //寫卡 f_clearpassword(); //清除密碼 f_changepassword(); //修改密碼 } }
標簽： 12345
上傳時間： 2017-10-20
上傳用戶：my_lcs
FLAHS WRITE AND READ
標簽： C8051 8051F FLASH 8051 F020 020
上傳時間： 2018-11-20
上傳用戶：shc0287
The idea of writing this book entitled “Cognitive Networked Sensing and Big Data” started with the plan to write a briefing book on wireless distributed computing and cognitive sensing. During our research on large-scale cognitive radio network (and its experimental testbed), we realized that big data played a central role. As a result, the book project reflects this paradigm shift. In the context, sensing roughly is equivalent to “measurement.”
標簽： Cognitive Networked Sensing Data Big and
上傳時間： 2020-05-26
上傳用戶：shancjb
Many times I have been asked to explain “ briefl y ” how SDH, SONET, and the OTN “ exactly ” work. The questions came mainly from new colleagues, stu- dents, and users of these technologies, personally or via the usenet newsgroup comp.dcom.sdh - sonet. I could have referred them to the standards documents, but to provide a more consistent and clear answer I decided to write this pocket guide. The objective of this book is that it can be used both as an introduction as well as a reference guide to these technologies and their spe- cifi c standards documents.
標簽： Generation Transport Optical ComSoc Guide
上傳時間： 2020-05-27
上傳用戶：shancjb
While teaching classes on digital transmission and mobile communications for undergraduate and graduate students, I was wondering if it would be possible to write a book capable of giving them some insight about the practical meaning of the concepts, beyond the mathematics; the same insight that experience and repetitive contact with the subject are capable to construct; the insight that is capable of build- ing the bridge between the theory and how the theory manifests itself in practice.
標簽： Transmission Digital
上傳時間： 2020-05-27
上傳用戶：shancjb
When the authors of this book asked me to write the foreword of their work on the digital enterprise, I immediately thought that it was one more document on a fashionable topic in the technology and the business world of the 21st Century often addressed by consulting firms, some of which have aspired to become experts on the subject. However, a more careful observation reveals that an issue more important than the sole subject of the digital enterprise is: “Is your company fully operational?”, because this is the real topic.
標簽： Digital_Transformation_Informatio n_System
上傳時間： 2020-05-27
上傳用戶：shancjb
蟲蟲下載站版權(quán)所有 京ICP備2021023401號-1
