共查询到20条相似文献，搜索用时 46 毫秒
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IDEA中非线性部分是算法的核心部分。为实现IDEA算法加密，详细分析了IDEA中非线性部分的实现过程，给出并证明一种简单的模2^16＋1乘积实现方法，最后给出了实现的C＋＋源程序，从而为IDEA在加密软件中的实现提供借鉴方法。 相似文献
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IDEA加密算法使用长度为128位的密钥,对64位的数据进行加密或解密操作,算法只使用了模(216 1)乘法、模216加法和按位异或运算,被广泛运用在各种领域.本文介绍了IDEA算法的基本原理及其在C#.NET中实现的详细代码.法;C#.NET;密钥 相似文献
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IDEA加密算法是已公开的可用算法中速度快且安全性强的分组密码算法,具有良好的应用前景。文章介绍了IDEA算法的基本原理及其在Java Apllet中实现的详细代码。 相似文献
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关于模m的连续二次剩余组中剩余的最大个数有一个至今还未解决的猜想，以此相应,本文提出了模m的等比剩余组的概念，并且利用二次剩余函数r(x)证明了模m的等比剩余组中剩余的最大个数是2R，在模m的标准分解式是m=p1^α1p2^α2……pn^αn时，这里的R是最小公倍数[r(p1^α1），r(p2^α2），……，r(pn^αn）]，其中r(pi^αi）是二次剩余函数r(x)在x=pi^αi时的函数值，i=1,2,3……，n。 相似文献
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构造了由多模泛函相干态、多模复共轭泛函相干态以及它们的相反态等几率线性叠加构成的多模泛函叠加态光场｜Ψ。^（4）（fj）〉q利用多模压缩态理论，研究了态｜Ψ。^（4）（fj）〉q的等幂次和压缩特性，发现：当腔模总数与压缩次数之积为奇数时，两正交相位分量可呈现互补对称的等幂次和压缩效应，其压缩程度、压缩深度与各模的经典强度和经典相位的空间分布函数等强烈地非线性关联．进一步研究发现，对由经典强度为厄米高斯分布的四个三模光场构成的态｜Ψ。^（4）（fj）〉q，只有第二正交相位分量呈现和压缩效应． 相似文献
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孙春生 《数理天地(高中版)》2009,(1):2-2
在公式（a＋b）^2=a^2＋b^2＋2a·b=｜a｜^2＋｜b｜^2＋2｜a｜·｜b｜cosθ（其中θ为向量a,b的夹角）中,既有向量的加法运算,又含有向量的内积;既有向量的模,又隐含向量的夹角在内．应用该公式解决已知几个向量的和,求向量的内积、夹角或模的问题时,会带来方便． 相似文献
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史美华 《浙江教育学院学报》2006,(2):78-83
设Г是三级三角矩阵代数，modГ表示Г上的有限生成模范畴，Г^ζ是与modГ等价的范畴．讨论了Г^ζ的Jaeabson根，Г^ζ的单对象及投射对象的形式及Г的整体雏数等同调性质． 相似文献
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本概括了各种优良准则，并在极小最小距离^[1]准则下详细讨论了正交表L16（4^4),L16(4^5)的优良性，给出了一个正交表L16（4^5),它在上述准则下优于[2]附录中提供的L16（4^5)。 相似文献
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林常青 《Journal of Zhangzhou Technical Institute》2005,7(3):1-4
在HAc介质中，Hg^2＋能灵敏催化a，a-联吡啶（bipy）取代[Fe（CN）6]^4-中的CN^-配位基的反应形成[Fe（bipy）3]^2＋络阳离子，而该[Fe（bipy）3]^2＋络阳离子和四溴荧光素阴离子（FinBr^-4）作用形成的[Fe（bipy）3]^2＋-[（FinBr4）2]^2-离子缔合物可在滤纸固体基质上发射室温磷光，据此建立了[Fe（bipy）3]^2＋-[（FinBr4）2]^2-离子缔合物固体基质室温磷光测定痕量汞的新方法。其线性范围为1．6～16（fg/斑）（0．4μL/斑，对应浓度0．004-0．04ng／mL），工作曲线的回归方程为△Ip=1．058＋7．671CHg2＋fg／斑），n=7，相关系数r=0．999，检出限：0．18fg／斑。所建方法用于人发、香烟样品中痕量汞（Ⅱ）的测定，结果满意。本文同时探讨了离子缔合物固体基质室温磷光测汞的反应机理。 相似文献
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《海外英语》2007,(5):10-11
Many college freshmen arrive woefully unprepared to do college work, and as disadvantaged populations continue to grow, the share of the American work force that has made it through college is expected to plummet. Many experts blame that educational failure not just on high schools but also on colleges. School & College, a special report by The Chronicle, looks at efforts to fix the system. What reforms would better prepare students for college? What should schools and colleges be doing differently? How should state and federal officials help? 相似文献
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罗艳萍 《读与写:教育教学刊》2008,5(6)
The communication of people partially is the communication of cultures. Culture has a direct effect on international commercial activities in all aspects. Different conceptions about time, space, equality, law and the like, lead people to deal with things in different ways. So to know cultures of the counterpart is to facil-itate our enterprises so as to have a smooth and successful communication in commercial activity. 相似文献
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《海外英语》2007,(4):36
There are numbers of crossroads on our long and unpredictable life journey where we totally have no idea about which direction to choose. No matter what our decision is, we should not turn back, but face the music and go ahead instead. I am this kind of girl who always does try without regretting, one example is how I dealt with my love. 相似文献
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Migration occurs behind a variety of reasons and has a great effect on the whole world. People may migrate in order to improve their economic situation, or in order to escape civil strife, persecution, and environmental disasters. The impact of migration is complex, bringing both benefits anddisadvantages. This paper briefly talks about the causes of migration, the allocation of benefits, and the ways in which individual countries and the international community deal with this important subject. 相似文献
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Sister Carrie is one of the most controversial characters in American literature.Thought as a "fallen woman" firstly,she was defined as a "new woman" by some critics later. However, by digging into the motivaton behind the whole process of Carrie's "success", the relationship between Carrie and her creator (the author), the social conditions of then American, it can be found that Carrie has never been free-standing on her thought and she has never found her real-sdf even after becoming a famous actress. In a society dominated by mass consumerism Carrie is only an adherent of her own desires. She also is a representative of all those country girls flooded into cities, a symbol and a sacrifice of the urbanization of America in a time countryside was overcome by cities. 相似文献
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RUZBEHANI Mohsen 《重庆大学学报(英文版)》2004,3(1):20-25
1.IntroductionOne-cyclecontrolmethod,whichwasproposedaboutonedecadeago[1],hasbecomeanattractivemethodinspecialfieldssuchaspowerfactorcorrection[2-6],switchingamplifiers[7,8],etc.Themainideaofthiscontrollerisbasedonintegrationofdiodevoltageinone-cycleandforcesittobeexactlyequaltothereferencevalue.Themainadvantageofthiscontrollerisitsrealtimeabilitytorejectthevariationofinputvoltage[1].Despitethisgreatability,ithasnogoodperformancesinrejectingofloaddisturbanceandfollowingreferencecommands.Espec… 相似文献
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Richard Denner 《海外英语》2007,(4):14-15
Rosco and I wait for the fishermen to return.I sit at a wooden bench near the store at Mt.Baker Resort and watch the clouds change shape. Rosco has my belt around his neck and an eight foot tow chain hooked to a tree. Dogs must be on a leash. Ducks and rabbits are loose. 相似文献