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L-<b>system</b>

  • 为 了提高用户身份认证和授权管理的灵活性

    为 了提高用户身份认证和授权管理的灵活性,从We b 应用系统的安全性角度出发,讨论了 一 种在. N E T F r a me w o r k下保证应用程序安全性的身份验证和授权模型,并给出了模型的具体实现方法。 该模型利用 F o r ms身份验证方法对用户的身份进行鉴别。在授权处理上,模型结合统一资源定位( u . J f o r m R e s o u r c e L o c a t o r , U R L ) 授权模式和用户所具有的系统角色,分别从页面级和页面操作级对用户的访问进行 控制。该模型在企业局域网环境内能够提供比较灵活的身份认证和基于角色的授权服务。实际应用表明, 基于该模型的We b应用系统能够对用户的访问进行有效的控制,从而保证了系统的安全性

    标签: 用户 授权 身份认证

    上传时间: 2013-12-31

    上传用户:VRMMO

  • 课程设计: 1.求出在一个n×n的棋盘上

    课程设计: 1.求出在一个n×n的棋盘上,放置n个不能互相捕捉的国际象棋“皇后”的所有布局。 2.设计一个利用哈夫曼算法的编码和译码系统,重复地显示并处理以下项目,直到选择退出为止。 【基本要求】 1) 将权值数据存放在数据文件(文件名为data.txt,位于执行程序的当前目录中) 2) 分别采用动态和静态存储结构 3) 初始化:键盘输入字符集大小n、n个字符和n个权值,建立哈夫曼树; 4) 编码:利用建好的哈夫曼树生成哈夫曼编码; 5) 输出编码; 6) 设字符集及频度如下表: 字符 空格 A B C D E F G H I J K L M 频度 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 频度 57 63 15 1 48 51 80 23 8 18 1 16 1

    标签:

    上传时间: 2017-04-24

    上传用户:zhyiroy

  • TMS2407开发平台键盘LED试验

    TMS2407开发平台键盘LED试验,键盘输入0,1,2,3,4,5,6,7,8,9,a,b,c,d,e,f,LED输出0,1,2,3,4,5,6,7,8,9,-,E,H,L,NULL

    标签: 2407 TMS LED 开发平台

    上传时间: 2017-05-30

    上传用户:541657925

  • 生成Trick文件工具 1.Open command line 2.input tricktest Usage: TrickTest -f -o -i -f source mpeg2 fil

    生成Trick文件工具 1.Open command line 2.input tricktest Usage: TrickTest -f -o -i -f source mpeg2 file to trick -o trick output directory -i output file id -m max coding error, default 0 -b max bitrate for trick generate, default 0 mean no limit -s trick buffer block size, must be n*188 -l log file, default c:\tricktest.log example: tricktest -f 黑鹰行动.mpg -o c:\temp -i A -m 1000 -b 3750000 soure file: 黑鹰行动.mpg output directory: c:\temp filename: 000000A,000000A.ff,000000A.fr,000000A.vvx max coding error: 1000 trick generation speed: 3750000 bps a

    标签: TrickTest tricktest command source

    上传时间: 2014-01-23

    上传用户:水口鸿胜电器

  • Fortran - Tóm tắ t nộ i dung mô n họ c Các khái niệ m và yế u tố

    Fortran - Tóm tắ t nộ i dung mô n họ c Các khái niệ m và yế u tố trong ngô n ngữ lậ p trình FORTRAN. Các câ u lệ nh củ a ngô n ngữ FORTRAN. Cơ bả n về chư ơ ng chư ơ ng dị ch và mô i trư ờ ng lậ p trình DIGITAL Visual Fortran. Viế t và chạ y các chư ơ ng trình cho các bài toán đ ơ n giả n bằ ng ngô n ngữ FORTRAN.

    标签: Fortran 7855 7897 7885

    上传时间: 2013-12-25

    上传用户:songrui

  • metricmatlab ch­ ¬ ng 4 Ma trË n - c¸ c phÐ p to¸ n vÒ ma trË n

    metricmatlab ch­ ¬ ng 4 Ma trË n - c¸ c phÐ p to¸ n vÒ ma trË n. 4.1 Kh¸ i niÖ m: - Trong MATLAB d÷ liÖ u ® Ó ® ­ a vµ o xö lý d­ íi d¹ ng ma trË n. - Ma trË n A cã n hµ ng, m cét ® ­ î c gä i lµ ma trË n cì n  m. §­ î c ký hiÖ u An  m - PhÇ n tö aij cñ a ma trË n An  m lµ phÇ n tö n» m ë hµ ng thø i, cét j . - Ma trË n ® ¬ n ( sè ® ¬ n lÎ ) lµ ma trË n 1 hµ ng 1 cét. - Ma trË n hµ ng ( 1  m ) sè liÖ u ® ­ î c bè trÝ trª n mét hµ ng. a11 a12 a13 ... a1m - Ma trË n cét ( n  1) sè liÖ u ® ­ î c bè trÝ trª n 1 cét.

    标签: metricmatlab 203 184 tr

    上传时间: 2017-07-29

    上传用户:来茴

  • Abstract-In this paper, simple autonomous chaotic circuits coupled by resistors are investigated. B

    Abstract-In this paper, simple autonomous chaotic circuits coupled by resistors are investigated. By carrying out computer calculations and circuit experiments, irregular self-switching phenomenon of three spatial patterns characterized by the phase states of quasi-synchronization of chaos can be observed from only four simple chaotic circuits. This is the same phenomenon as chaotic wandering of spatial patterns observed very often from systems with a large number of degrees of freedom. Namely, one of spatial-temporal chaos observed from systems of large size can be also generated in the proposed system consisting of only four chaotic circuits. A six subcircuits case and a coupled chaotic circuits networks are also studied, and such systems are confirmed to produce more complicated spatio-temporal phenomena.

    标签: investigated Abstract-In autonomous resistors

    上传时间: 2014-06-09

    上传用户:h886166

  • ARINC429总线

    •ARINC429总线协议是美国航空电子工程委员会(Airlines Engineering Committee)于1977年7月提出的,并于同年发表并获得批准使用,它的全称是数字式信息传输系统(Digital Information Transmission System ) 。协议标准规定了航空电子设备及有关系统间的数字信息传输要求。ARINC429广泛应用在先进的民航客机中,如B-737、B-757、B-767,俄制军用飞机也选用了类似的技术。

    标签: ARINC429 总线

    上传时间: 2015-03-25

    上传用户:423619775

  • ISIS Timer Design

    A design about 8051 (running at 12MHz) based system with 3 7-Seg displays and two buttons to implement the following functions.  1. When press the + button, the display C = A+B.  2. When press the button, the display C = A - B.  “A” and “B” are 8-bit inputs when “C” is 9-bit output. 

    标签: ISIS AT89C52

    上传时间: 2015-05-05

    上传用户:guoxiy

  • php+mysql物流配送网

    一个实现全程跟踪服务的物流管理系统。采用PHP+mysql开发,附带所有源程序及数据表。-A follow-up services to achieve the whole system of logistics management. Developed using PHP+ mysql, with all source code and data in table form.

    标签: php+mysql物流配送网

    上传时间: 2015-06-11

    上传用户:liumangxiao