词法分析器，输出单词种别及种别编码。较为简单，仅供参考。-Lexical analyzer, the output word kind and species do not coding. Simpler for reference only.

建立了一种百叶窗翅片的二维数学模型，采用SIMPLER算法，对空气流经翅片的传热和流动特性进行了数值模拟计算，获得了百叶窗翅片的温度场，速度场和流线图。对不同百叶窗倾角和不同雷诺数进行了数值模拟，结果揭示了阻力系数和Nu数的变化规律。在此基础上，采用场协同原理分析了温度梯度与速度矢量的夹角对百叶窗翅片换热的影响-A two dimensional numerical model is established for a type of louvered fin, the temperature

Thus PSK systems require less transmitted power for a given probability of error than ASK or FSK systems. Synchronous detection of PSK signals is required,due to the absense of a large carrier component.Carrier recovery is there for emore compl

Algorithms are at the core of computing. To be able to write an algorithm once and for all to work with any type of sequence makes your programs both simpler and safer. The ability to customize algorithms at runtime has revolutionalized software deve