期刊文献+
共找到8篇文章
< 1 >
每页显示 20 50 100
数论、高斯数在密码中的应用
1
作者 郝稚传 葛建军 景亚萍 《贵州师范大学学报(自然科学版)》 CAS 2003年第4期24-27,31,共5页
我们熟知勾股定理32+42=52,22+32+62=72我们得到两个公式和应用.
关键词 数论 高斯数 密码 勾股定理 毕达哥斯定理 组合数学
下载PDF
数论、组合数学、群论在密码学中的应用(1)
2
作者 郝稚传 葛建军 谢鹏 《贵州师范大学学报(自然科学版)》 CAS 2002年第1期65-69,共5页
在RSA体制的基础上提出了一种新型公钥密码体制。新体制用组合变换为底的幂剩余函数作和及毕达哥斯作加、解密变换、消除了RSA体制的周期而不能被直接破译 ,本文的论证表明 ,新体制的安全性远高于RSA体制。
关键词 幂剩余函数 公钥密码体制 数论 组合数学 毕达哥斯定理 群论 密码学 组合变换
下载PDF
Pythagoras Theorem Combinatorial Number Setand Generalization
3
作者 郝稚传 《Chinese Quarterly Journal of Mathematics》 CSCD 2002年第3期78-83,共6页
WegetPythagorasTheoremontwocombinatoiralnumbersets.If 32 +42 =52 ;62 +82 + 2 4 2 =2 62 thenwehave (ⅰ )and (ⅱ ) : (ⅰ )Ifnisanoddthen ∑[(n+ 3 ) / 2 ] t=0 n+ 3 -t t 2 -∑[(n+ 1 ) / 2 ] t=0 n+ 1 -t t 2 2 +... WegetPythagorasTheoremontwocombinatoiralnumbersets.If 32 +42 =52 ;62 +82 + 2 4 2 =2 62 thenwehave (ⅰ )and (ⅱ ) : (ⅰ )Ifnisanoddthen ∑[(n+ 3 ) / 2 ] t=0 n+ 3 -t t 2 -∑[(n+ 1 ) / 2 ] t=0 n+ 1 -t t 2 2 + 2 ∑[n/ 2 ] t=0 n-t t · ∑[(n+ 4 ) / 2 ] t=0 n+ 4 -t t 2 + 4 ∑[(n+ 2 ) / 2 ] t=0 n+ 2 -t t 2 =∑[(n+ 1 ) / 2 ] t=0 n +1-t t 2 +∑[(n+ 3 ) / 2 ] t=0 n +3-t t 2 2 . (ⅱ )Ifnisaneventhen ∑[(n+ 4 ) / 2 ] t=0 n+ 4 -t t 2 -∑[n/ 2 ] t=0 n-t t 2 2 + 2 ∑[(n+ 1 ) / 2 ] t=0 n+ 1 -t t · ∑[(n+ 3 ) / 2 ] t=0 n + 3 -t t 2 + 4 ∑[(n+ 2 ) / 2 ] t=0 n+ 2 -t t 2 =∑[n/ 2 ] t=0 n -t t 2 +∑[(n+ 4 ) / 2 ] t=0 n +4-t t 2 2 . 展开更多
关键词 PythagorasTheorem combinatorialnumberset generalizationofPythagorasTheorem
下载PDF
The Italic School in Astronomy: From Pythagoras to Archimedes 被引量:1
4
作者 Giuseppe Boscarino 《Journal of Physical Science and Application》 2014年第6期385-392,共8页
It is argued that it has not yet been able to value the historical, philosophical and epistemological travail, represented by the filth and fourth centuries BC of the ancient Greek world, which preceded the highest sc... It is argued that it has not yet been able to value the historical, philosophical and epistemological travail, represented by the filth and fourth centuries BC of the ancient Greek world, which preceded the highest scientific heritage, represented by the so-called golden age of Euclid, Archimedes and Apollonius, Ⅲ-Ⅱ century BC. Well, it is believed that with our complex concept of tradition of thought within which we insert not only epistemological concepts but also philosophical principles, historical and social frameworks, in stasis or in strong movement, processed by us, it is possible better interpret that happy moment of scientific constructions of the third and second century BC, as a result of the valorization of the deep travail and serious battle that preceded it between the fourth and fifth century BC. It is investigated in particular in our paper the development of astronomical thought between the fifth and fourth centuries BC, in the ancient Greek thought, and at last a particular presumed criticism by Archimedes in his Sandreckoner to Aristarchus. 展开更多
关键词 Scientific theories Traditions of thought.
下载PDF
Thales of Miletus, Archimedes and the Solar Eclipses on the Antikythera Mechanism
5
作者 G6ran Henriksson 《Journal of Earth Science and Engineering》 2014年第12期757-769,共13页
Thales of Miletus (640?-546 BC) is famous for his prediction of the total solar eclipse in 585 BC. In this paper, the author demonstrate how Thales may have used the same principle for prediction of solar eclipses ... Thales of Miletus (640?-546 BC) is famous for his prediction of the total solar eclipse in 585 BC. In this paper, the author demonstrate how Thales may have used the same principle for prediction of solar eclipses as that used on the Antikythera Mechanism. At the SEAC conference in Alexandria in 2009, the author presented the paper "Ten solar eclipses show that the Antikythera Mechanism was constructed for use on Sicily." The best defined series of exeligmos cycles started in 243 BC during the lifetime of Archimedes (287-212 BC) from Syracuse. The inscriptions on the Antikythera Mechanism were made in 100-150 BC and the last useful exeligmos started in 134 BC. The theory for the motion of the moon was from Hipparchus (ca 190-125 BC). A more complete investigation of the solar eclipses on the Antikythera Mechanism reveals that the first month in the first saros cycle started with the first new moon after the winter solstice in 542 BC. Four solar eclipses 537-528 BC, from the first saros cycle, and three one exeligmos cycle later, 487-478 BC, are preserved and may have been recorded in Croton by Pythagoras (ca 575-495 BC) and his school. 展开更多
关键词 Solar eclipse exeligmos cycle saros cycle seasonal hour equinoctial hour.
下载PDF
Philosophy of Mathematics: Naturalism vs. Category Theory
6
作者 Milan Tasic 《Journal of Philosophy Study》 2013年第10期929-944,共16页
Although E Maddy (1997) says on naturalism: "This is not, in itself, a philosophy of mathematics [...]" (161), already by its name, or by those whose interest has called on it (Quine, Putnam et al.) ... it an... Although E Maddy (1997) says on naturalism: "This is not, in itself, a philosophy of mathematics [...]" (161), already by its name, or by those whose interest has called on it (Quine, Putnam et al.) ... it anyhow reveals desire to be it. Insofar as otherwise, the semantic potential of the word leaves far behind it (after all scarce) results it achieved from the relation of an exact (mathematical) expression and (overly rich) intuitive reality of Being. We plead here already from the perspective of the slogan "One and All" of the first philosopher: Tales, when by the number (which one forebodes) one could go to such an extent into areas of reality (Pythagoras), or when (especially in the human sphere) is being over again actual final cause of Aristotle the philosophy and the mathematics to accomplish far more fruitful encounter with the Being. Alain Badiou (1988) has already pointed that: "Mathematics is ontology," and the category theory in mathematics, having covered by itself other fields of this science, continues to find applications in a series of"non-traditional" domains of reality. In that correlation the philosophy can express its (primary) needs for truth, justice, beauty, ... as well as for the overall development in the sense of purpose--also because of an undreamed power of the technological development (of hardwares and softwares) today. Namely, the naturalism in mathematics, which developed an abundant reflection on the place (importance of) the mathematical idiom in sciences--in the balance of criticism--has come rather to meager provisions, such as: "preestablished harmony of thinking," "ontic commitment," (Quine 1960) "the hygiene of mind," (Maddy 1996) "success argument," (Putnam 1975) "pragmatic argument," (Resnik 1981) etc., which only are few places from the encounter of an exact expression such as is mathematical one and the reality of natuural sciences. Instead of philosophy of mathematics to radicalize its claims from the perspective of that (powerful) mathematical idiom and the excessive reality of Being and man's place in it--this time, in the spirit of biocosmology (neo-Aristotelism). 展开更多
关键词 NATURALISM indispensability argument ontology MATHEMATICS CATEGORY final cause biocosmology
下载PDF
哲学还是爱智慧 被引量:12
7
作者 田海平 《社会科学战线》 CSSCI 北大核心 2000年第1期39-46,共8页
关键词 毕达哥大拉斯 哲学 爱智慧 哲学意识
原文传递
“和”:寄寓世界的梦想
8
作者 言时平 《政工研究动态》 2008年第16期1-1,共1页
2008北京奥运会开幕上,"和"字的转换,从篆体到宋体,向世界展示了中国文字的演化过程和深厚的文化底蕴,给大家留下了深刻的印象。奥运开幕式文艺表演中出现的这个"和"字不单单是展示中国文字的演化过程,其中还蕴涵... 2008北京奥运会开幕上,"和"字的转换,从篆体到宋体,向世界展示了中国文字的演化过程和深厚的文化底蕴,给大家留下了深刻的印象。奥运开幕式文艺表演中出现的这个"和"字不单单是展示中国文字的演化过程,其中还蕴涵了更深刻的含义,与奥运精神有着千丝万缕的联系。 展开更多
关键词 奥运开幕式 奥运精神 中国文字 古代奥运会 奥运圣火 文化底蕴 和谐奥运 体育健儿 精神体现 毕达哥
原文传递
上一页 1 下一页 到第
使用帮助 返回顶部