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The Epistemology of J. M. Keynes   总被引:1,自引:0,他引:1  
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 Diplopanax is a genus described by H. Handel-Mazzetti in 1933 according to a flowered specimen.  It was originally considered as belonging to the family Araliaceae. But fruit characters of this genus such as very large in size, oblong-ovoid in shape, and containing only one seed in a locule which has a curved embryo and very hard when dry etc., differ greatly from all other araliaceous plants, and evidently resemble those of the cornaceous genus Mastixia Bl.  In addition, the fruit is very similar to the cornaceous fossil genus Tectocarya F. Kirchh., from which it may be distinguished by the absence of 2 germinate pores in the  endocarp.   Consequently,  the  present author tends to consider that the genus Diplopanax Hand.-Mazz. is best placed in Cornaceae, not in Araliaceae.    相似文献   

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The causes of the transfer of technology between countries is now seen as an important dimension of the diffusion of new products and processes. Despite its obvious importance, there has been little empirical research investigating the international transfer of technology, although the work of Schiffel and Kitti (Research Policy 7 (1978)) provides a useful foundation on which to build. The research reported below tests the hypothesis that the transfer of technology between countries, as measured by the movement of patented invention, is influenced by both supply side and demand side factors. The principal variables are: patenting activity in the country of origin; the size of the recepient economy; international trade in goods and services; and the operations of multinational producing enterprises. These vaiables explain most of the variation across countries in the transfer of U.S. technology abroad. The worldwide distribution of U.S. based multinational enterprises appear to play an important part in explaining U.S. technology tranfer. On the other hand, the remaining international differences in patent law do not seem to significantly affect patent flows between countries.  相似文献   

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 The purpose of the present paper is to discuss the systematic position of the genus Schnabelia originally proposed by H. Handel-Mazzatti in 1921, who considered it as be- longing to the family Verbenaceae, a point which he further emphasized in 1936.  How- ever, in his paper on the Chinese verbenaceous plants (1932), Prof. Pei Chien thought the genus should be removed from Verbenaceae into Labiatae and allied it with such genera as Ajuga and Teucrium on the ground that it also has deeply lobed ovary. Since then botanists on Chinese plants, such as Prof. Y. Z. Sun, F. C. How, etc. have always considered Schnabelia Hand.-Mazz. as a genus of Labiatae.      The present writer has recently studied the  genus,  comparing  its  morphology  of ovary, calyx lobes, pedicels, pollen grains, etc. with a number of verbenaceous genera, and comes to the conclusion that the genus should belong to Verbenaceae as H. Handel- Mazzatti first proposed and that it is closely allied to the genus Caryopteris, especially C. nepetaefolia (Benth.) Maxim.  Moreover, he considers that the deeply lobed ovary is not at all a good character even for generic separation, for several genera in Ver- benaceae, such as Caryopteris, Clerodendron, just like Teucrium and Ajuga of Labiatae, also have deeply lobed ovaries.      From the ample herbarium material, the present writer discovered for the first time that the genus Schnabelia has two types of flowers,  cleistogamous  and  chasmogamous. The original founder of the genus did not know this peculiar floral  character,  as  not mention of it was made in the generic diagnosis.  Chienodoxa Sun (1951) proves to be the present genus, which is based upon the cleistogamous type of flowers of an allied or perhaps the same species.    相似文献   

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评布鲁克斯的《情报科学的发展》   总被引:1,自引:0,他引:1  
本文对世界知名的情报科学专家英国的B.C.布鲁克斯的专稿——《情报科学的发展》,从四个方面进行了学术评论:(1)努力向“科学”高度挺进;(2)对文献计量学独特的认识与理解;(3)适当地评价电子计算机在情报科学发展中的作用;(4)重视科学计量学。  相似文献   

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<正> (九)主要高技术领域的发展概况 (1) 软件工业 美国的软件工业起步于60年代中期,当时联邦政府开始对软件基础研究进行投入。目前,全世界软件工业产值约3000亿美元,到2003年,将以15%的速度增加,软件工业的发展大大地改  相似文献   

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发现卧龙乌头Aconitum wolongense W.T. Wang的模式实际上包含两种植物,即毛果甘青乌头A. tanguticum (Maxim.)Stapf.var.trichocarpum Hand.-Mazz.和展毛大渡乌头A.franchetii Fin.et Gagnep.var.villosum W.T. Wang,故将该种予以归并。  相似文献   

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