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SAFER系列密码算法的设计与分析
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作者 张文涛 吴文玲 卿斯汉 《中国科学院研究生院学报》 CAS CSCD 2002年第4期415-421,共7页
SAFER系列密码算法的总体结构采用SP 网络,它的设计具有其独到的几个特色。分析SAFER系列密码算法的设计思想,沿着设计者对它们不断改进的思路,分别描述其混淆层、扩散层、密钥扩展算法的性质和对它们的攻击。
关键词 SAFER系列密码算法 分组密码 混淆层 扩散层 密钥扩展算法 算法设计 sp-网络
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How the Organization of Milk Producers in a Network of Companies Improved the Productivity
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作者 Marcelo Tsuguio Okano Oduvaldo Vendrametto Osmildo Sobral dos Santos 《Journal of Agricultural Science and Technology(A)》 2012年第2期228-236,共9页
The present study is the result of an investigation of the organization of milk producers in the region of Fartura, SP, relations between the various actors in this chain of milk, the benefits obtained from this relat... The present study is the result of an investigation of the organization of milk producers in the region of Fartura, SP, relations between the various actors in this chain of milk, the benefits obtained from this relationship and classification of these properties in the dairy chain, allowing to measure productivity through the proposed indicators. Research has shown that dairy farmers in the region of Fartura had several benefits to organizing themselves as a Local Productive Arrangement or Social Networks, especially in relation to a better pay the price of a gallon of milk. To achieve these results, farmers had to invest to improve technological standards and production processes and thereby increase milk quality and productivity. 展开更多
关键词 Agribusiness milk production milk chain dairy cattle.
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