WELSH

作品数:37被引量:15H指数:2
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WELSH' S CONJECTURE IS TRUE FOR SIMPLE BINARY MATROIDS
《Chinese Science Bulletin》1985年第9期1147-1150,共4页刘桂真 
Ⅰ. INTRODUCTION Welsh conjectured that on average a matroid has fewer circuits than the bases it has. But he has not found a way to prove his conjecture. Up to now the reports on this respect are very few. Quirk and ...
关键词:WELSH SIMPLE bases TRUE CONJECTURE circuits TRIANGLE SUPPOSE cycle arbitrarily 
THERMAL DIFFUSIVITY OF LiTaO_3, RELATED TO ITS PHASE TRANSITION AND CRYSTAL ORIENTATION
《Chinese Science Bulletin》1982年第9期952-955,共4页奚同庚 王本民 倪鹤林 殷之文 
Lithium tantalate (LiTaO3) single crystal is one of the most important ferroelectric crystals for its excellent piezoelectric, pyroelectric and photoelectric properties. Many of its physical properties have been wid...
关键词:FERROELECTRIC piezoelectric PHOTOELECTRIC CURIE SUDDEN INSTANT deter WELSH entirely reasonably 
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