Two Encryption and Decryption Algorithms of String based on Bit Operation

Then we researched the methods of mining frequent items to get association rules using binary granules with two-dimension table and link structure.

然后本文分别研究了在采用二维表的形式和链式结构来存储信息粒下，利用二进制粒位运算提取频繁项目集来发现关联规则。

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As original sequences are transformed into Boolean series, we can get the correlation results effectively by bit operations among Boolean series.

通过简单的转换将原始数据流序列转换为布尔序列，利用布尔序列间的位运算快速获取结果。

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Flagging current status of object with bit-operation

位运算标记对象的当前状态

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Weight-based multi-index structure of subscriptions reduces the matching of the same triple, bitwise based semantic matching algorithm greatly improves the matching efficiency.

基于权重的订阅多层索引结构有效的减少了相同三元组的重复匹配，基于位运算的语义匹配大大提高了匹配的效率。

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The calculation of session key groups and the verifying of parameters' correctness are done by simple bit operation on the basis of completing identity authentication, and the asynchronous attack can be resisted by dynamically switching the parameter of the protection keys.

协议在完成身份认证的基础上，会话密钥组的计算与参数的正确性确认均采用简单的位运算，并且通过参保密钥的动态切换可以抵抗非同步攻击。

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Teaching Methords of C Program about Bit Operation

C程序设计的位运算教学方法

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An image scrambling method based on bit operation of diagonally folded pixels

基于对角折叠位运算的图像置乱方法

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As I mentioned in the introduction, PL/ SQL and T-SQL supports bitwise operations between arguments declared as integer.

正如简介中提到的，PL/SQL和T-SQL支持声明为integer的变量之间的逐位运算。

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By using searching state vector and char-pattern matching vector, this approach transforms comparisons for string matching into simple integer bit operations and, by searching string from the two ends to the middle, it implements efficiently the parallel approximate string searching on multiprocessors.

通过引入搜索状态向量及字符－模式匹配向量，该技术将字符串匹配比较转化为简单的整数字位运算，通过对字符串方向相反的搜索有效地实现了多处理机对字符串的并行相似检索。

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Bitmap index is widely used in the data warehouse because of its simple structure and its high efficiency of logic operation.

其中位图索引因为其结构简单，并且硬件支持二进制位运算效率很高，被广泛应用在数据仓库中。

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Algorithm use bit operation to vastly calculate pixel cover area, and the brightness levels is up to 2~ n ( n for the sub-pixel digits, usually n get 8).

算法通过位运算快速计算像素的覆盖面积，并且像素亮度等级可达到2n（n为亚像素位数，通常情况n取8）。

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An Image Encryption Algorithm Based on Bit-Computation

一种基于位运算的数字图像加密算法

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The Application Tips of C Language in Bit Operation

C语言位运算功能的妙用

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A language construct that specifies an operation and identifies its operands, if any. The bitwise operators come from C's low-level orientation;

指出某种操作并标识其操作数（如果有操作数的话）的一种语言构造。按位运算来源于c语言的低级操作。

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Effective transposition logic is designed by using registers and Block RAM resources within FPGA.

利用FPGA的寄存器和Block RAM资源，设计出高效的按位转置运算逻辑。

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We define an extended class of integer linear first-order logic formula, which supports most integer linear and bit-wise expressions in C programs including integer division, integer modular and bit-wise operation.

我们定义了一类整数线性一阶逻辑判定公式，此类判定公式支持C程序中常用的整数线性运算。我们优化了判定过程，并扩充了对整数除法、取余和位运算的支持。

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The next and last UDF to cover bitwise operations is bitwise NOT that performs a bitwise logical NOT operation for one given integer value as translated to a binary expression.

下一个也是最后一个涉及逐位运算的UDF是逐位NOT运算，在转换成二进制表达式时，该UDF对给定的整数值执行逐位逻辑NOT运算。

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In order to protect the information in image, we present an image hiding method based on bit-operation and chaotic system.

为了能够实现对数字图像内容信息的有效保护，文章结合基于混沌系统的数字图像加密算法，给出了一种基于位运算的数字图像隐藏技术。

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The correlation of the pixel bits is analyzed.

分析了像素的高位与低位的相关性，提出了对字位进行运算的无损压缩算法。

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Primitives now support weak typing, where any data type can be used.

原语现在支持弱类型，可以使用任何数据类型。

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