Gastric antral vascular ectasia (GAVE) is a rare clinical disease which can cause recurrent upper gastrointestinal (GI) tract bleeding. It is responsible for about 4% of non-variceal upper GI haemorrhages. As one of t...Gastric antral vascular ectasia (GAVE) is a rare clinical disease which can cause recurrent upper gastrointestinal (GI) tract bleeding. It is responsible for about 4% of non-variceal upper GI haemorrhages. As one of the vascular diseases that happened in stomach, GAVE was also named as watermelon stomach (WS) for its characteristic endoscopic performance. Compared with portal hypertensive gastropathy (PHG) which with similar performances under endoscopy but often appeared as the result of portal hypertension, the etiology of GAVE is unknown. Recent years with further research it received several presumptions according to its histopathological features. Here we will introduce the disease systematically through two cases.展开更多
若干年前,此间曾风靡Walkman。特别对于那些年轻人,腰挎“随身听”是一种时尚 即使在数字家电大行其道的今天,兼之Diskman的篡位威胁,Walkman仍魁力不减。但说起Walkman的发明者,恐怕知情者寥寥。他就是本文的主角——Akio Morita。 读...若干年前,此间曾风靡Walkman。特别对于那些年轻人,腰挎“随身听”是一种时尚 即使在数字家电大行其道的今天,兼之Diskman的篡位威胁,Walkman仍魁力不减。但说起Walkman的发明者,恐怕知情者寥寥。他就是本文的主角——Akio Morita。 读者朋友,在您看到这篇文章的时候,Walkman之父已不再人世了,但我们不妨怀着一份崇敬,跟随作者的娓娓叙述,来看看他那传奇般的一生吧。 1.少年创业 The heir to one of Japan’s oldest sake-brewing families,Morita declined totake over the family business and…founded the firm that was to become a worldelectronic and entertainment giant. 2.勇于创新 Morita’s most famous brainchild, the Walkman,first appeared in 1979after he overrode opposition from those within his own company who saw nofuture for the product. 3.以国为荣 He made a point of flying the Japanese flag outside Sony’s U.S.showroomon Fifth Avenue in Manhattan. 读完全文,您是否觉得在这位传奇人物身上存在着让我们心动的品质?展开更多
For any given coprime integers p and q greater than 1, in 1959, B proved that all sufficiently large integers can be expressed as a sum of pairwise terms of the form p^aq^b. As Davenport observed, Birch＇s proof can b...For any given coprime integers p and q greater than 1, in 1959, B proved that all sufficiently large integers can be expressed as a sum of pairwise terms of the form p^aq^b. As Davenport observed, Birch＇s proof can be modified that the exponent b can be bounded in terms of p and q. In 2000, N. Hegyvari effective version of this bound. The author improves this bound.展开更多
文摘Gastric antral vascular ectasia (GAVE) is a rare clinical disease which can cause recurrent upper gastrointestinal (GI) tract bleeding. It is responsible for about 4% of non-variceal upper GI haemorrhages. As one of the vascular diseases that happened in stomach, GAVE was also named as watermelon stomach (WS) for its characteristic endoscopic performance. Compared with portal hypertensive gastropathy (PHG) which with similar performances under endoscopy but often appeared as the result of portal hypertension, the etiology of GAVE is unknown. Recent years with further research it received several presumptions according to its histopathological features. Here we will introduce the disease systematically through two cases.
文摘若干年前,此间曾风靡Walkman。特别对于那些年轻人,腰挎“随身听”是一种时尚 即使在数字家电大行其道的今天,兼之Diskman的篡位威胁,Walkman仍魁力不减。但说起Walkman的发明者,恐怕知情者寥寥。他就是本文的主角——Akio Morita。 读者朋友,在您看到这篇文章的时候,Walkman之父已不再人世了,但我们不妨怀着一份崇敬,跟随作者的娓娓叙述,来看看他那传奇般的一生吧。 1.少年创业 The heir to one of Japan’s oldest sake-brewing families,Morita declined totake over the family business and…founded the firm that was to become a worldelectronic and entertainment giant. 2.勇于创新 Morita’s most famous brainchild, the Walkman,first appeared in 1979after he overrode opposition from those within his own company who saw nofuture for the product. 3.以国为荣 He made a point of flying the Japanese flag outside Sony’s U.S.showroomon Fifth Avenue in Manhattan. 读完全文,您是否觉得在这位传奇人物身上存在着让我们心动的品质?
基金Project supported by the National Natural Science Foundation of China (Nos. 10771103, 11071121)
文摘For any given coprime integers p and q greater than 1, in 1959, B proved that all sufficiently large integers can be expressed as a sum of pairwise terms of the form p^aq^b. As Davenport observed, Birch＇s proof can be modified that the exponent b can be bounded in terms of p and q. In 2000, N. Hegyvari effective version of this bound. The author improves this bound.
