The "GEE! It s Simple" package illustrates Gaussian elimination with partial pivoting, which produces a factorization of P*A into the product L*U where P is a permutation matrix, and L and U are lower and upper triangular, respectively.
The functions in this package are accurate, but they are far slower than their MATLAB equivalents (x=A\b, [L,U,p]=lu(A), and so on). They are presented here merely to illustrate and educate. "Real" production code should use backslash and lu, not this package.
The "GEE! It s Simple" package illustrates Gaussian elimination with partial pivoting, which produces a factorization of P*A into the product L*U where P is a permutation matrix, and L and U are lower and upper triangular, respectively.
The functions in this package are accurate, but they are far slower than their MATLAB equivalents (x=A\b, [L,U,p]=lu(A), and so on). They are presented here merely to illustrate and educate. "Real" production code should use backslash and lu, not this package.
一個基于GTK+的單詞數值計算器,1、 按照規則計算單詞的值,如果 A B C D E F G H I J K L M N O P Q R S T U V W X Y Z 26個字母(全部用大寫)的值分別為 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26,如:
WINJACK這個單詞的值就為:W+I+N+J+A+C+K=23+9+14+1+3+11=71%
HARDWORK=H+A+R+D+W+O+R+D=8+1+18+4+23+15+18+11=98%
LOVE=L+O+V+E=12+15+22+5=54%
LUCK=L+U+C+K=12+21+3+11=47%
ATTITUDE= A+T+T+I+T+U+D+E=1+20+20+9+20+24+4+5=100%
2、對程序的界面布局參考如下圖所示,在第一個單行文本框輸入一個單詞,點擊“計算”按鈕,按照以上算法計算出該單詞的值。
3、如果在最下面的單行文本框輸入一個文件路徑,此文件每行記錄一個單詞,那么經過程序計算出各個單詞的值,并把結果輸出到當前目錄下result.txt文件中。如果文件不存在,應該提示錯誤。
Instead of finding the longest common
subsequence, let us try to determine the
length of the LCS.
Then tracking back to find the LCS.
Consider a1a2…am and b1b2…bn.
Case 1: am=bn. The LCS must contain am,
we have to find the LCS of a1a2…am-1 and
b1b2…bn-1.
Case 2: am≠bn. Wehave to find the LCS of
a1a2…am-1 and b1b2…bn, and a1a2…am and
b b b
b1b2…bn-1
Let A = a1 a2 … am and B = b1 b2 … bn
Let Li j denote the length of the longest i,g g
common subsequence of a1 a2 … ai and b1 b2
… bj.
Li,j = Li-1,j-1 + 1 if ai=bj
max{ L L } a≠b i-1,j, i,j-1 if ai≠j
L0,0 = L0,j = Li,0 = 0 for 1≤i≤m, 1≤j≤n.
為 了提高用戶身份認證和授權管理的靈活性,從We b 應用系統的安全性角度出發,討論了
一
種在. N E T F r a me w o r k下保證應用程序安全性的身份驗證和授權模型,并給出了模型的具體實現方法。
該模型利用 F o r ms身份驗證方法對用戶的身份進行鑒別。在授權處理上,模型結合統一資源定位( u . J f o r m
R e s o u r c e L o c a t o r , U R L ) 授權模式和用戶所具有的系統角色,分別從頁面級和頁面操作級對用戶的訪問進行
控制。該模型在企業局域網環境內能夠提供比較靈活的身份認證和基于角色的授權服務。實際應用表明,
基于該模型的We b應用系統能夠對用戶的訪問進行有效的控制,從而保證了系統的安全性
課程設計:
1.求出在一個n×n的棋盤上,放置n個不能互相捕捉的國際象棋“皇后”的所有布局。
2.設計一個利用哈夫曼算法的編碼和譯碼系統,重復地顯示并處理以下項目,直到選擇退出為止。
【基本要求】
1) 將權值數據存放在數據文件(文件名為data.txt,位于執行程序的當前目錄中)
2) 分別采用動態和靜態存儲結構
3) 初始化:鍵盤輸入字符集大小n、n個字符和n個權值,建立哈夫曼樹;
4) 編碼:利用建好的哈夫曼樹生成哈夫曼編碼;
5) 輸出編碼;
6) 設字符集及頻度如下表:
字符 空格 A B C D E F G H I J K L M
頻度 186 64 13 22 32 103 21 15 47 57 1 5 32 20
字符 N O P Q R S T U V W X Y Z
頻度 57 63 15 1 48 51 80 23 8 18 1 16 1