共查询到20条相似文献，搜索用时 15 毫秒
1.
The paper argues that the theory that opens out the nature of subject indexing process is required, if the process consists of a tremor of steps and elements and it is a range of interpretations, too. The paper points out that Peirce' s semiotics is the theory by which we may study and understand the lmture of interpretation in subject indexing pro-cess. In recent years, there is a great interest in semiofcs in library and information science field. The paper discusses some basic issues of semiotics and its use in information science. 相似文献
2.
《中国科学院院刊(英文版)》2006,(1)
Chinese civilization has a long history of 5,000years. It is China’s fine tradition to attach im-portance to ethics and morality, that is “Allmust regard self-cultivation as the root.” Confucius oncesaid that “Benevolence means love of people.” He ad 相似文献
3.
L Houyuan 《中国科学院院刊(英文版)》2010,24(3):185-187
The emergence of agriculture is one of the most important revolutionary events in the history of human development. It unveiled a new era in which the humankind controls and creates food resources, laying a foundation of substance for the naissance of civilization and the formation of modern society. It is also among the three major ＂origin＂issues that have received long-lasting attention from academic communities： the origins of humankind, agriculture and civilization. 相似文献
4.
《中国科学院院刊(英文版)》2008,22(2):88-89
The regulatory mechanism for neuronal migration in the developing cortex is a major unsolved problem in developmental neurobiology. It is generally accepted that the migration of newborn pyramidal neurons from the ventrieular zone toward upper cortical layers is guided by radial glial fibers in the developing cortex, and that the laminar structure of the cortex isformed through regulated attachment and detachment of migrating neurons with radial glial fibers. However, whether the radial migration of cortical neurons can be guided by a gradient of diffusible factors is unknown, a potential guidance mechanism that has long been overlooked. 相似文献
5.
1. Cohesion and Coherence According to Halliday and Hasan (1976: 4), cohesion is relations of meaning that exist within the text and that define it as a text. Cohe- sion occurs where the interpretation of some element in the discourse is dependent on that of another. Grammar and lexis are two means to realize the goal of cohesion. In other words, there are grammatical co- hesion and lexical cohesion. Coherence refers to the relationships, which link the meanings of utterances in a discourse … 相似文献
6.
A comparison of morphology, karyotype and the chemical compounds among
“Jinxiong”, Ligasticum chuanxiong Hort. and L. chuanxiong cv. Fuxiong shows that “Jin-
xiong”, like L. chuanxiong cv. Fuxiong, is a triploid and its karyotype is similar to that of
L. chuanxiong with the formula K(2n)=33=24m+6sm+3st(SAT). Thin-layer chromato-
graphy of essential oils extracted from stem tubers confirms that the three taxa are extremely
alike in chemical compounds. Using the features of leaves and the forms of stem tubers, they
can be easily distinguished. A new triploid cultivar of L. chuanxiong Hort. i.e.L. chuan-xiong cv. Jinxiong is described for “Jinxiong” in the present paper. 相似文献
7.
The “Quan Fang Bei Zu”, a first dictionary for Chinese plants, which contains 27
volumes in its first collection and 31 volumes in its second collection, was completed by
Chen Jing-yi in 1253, the First Year of Bao You of Li Zong in Song Dynasty. The
first part of this encyclopaedia of plants is devoted to flowers. The second part is of
more varied nature, dealing with fruit trees, plants in general, herbs, trees, agriculture
and sericulture, vegetables, and medicinal herbs. These two collections cover 267 kinds
of plants, each of which is described under two categories separately: The first category,
“Si Shi Zu” in Chinese, meaning “facts of the plants” concerned, which again divided
into 3 entries, i.e. the history, miscellaneous information and sundry bits of the plants.
The second category, “Fu Yong Zu” in Chinese, meaning poetry, which divided into
10 meters, wherein the plants are described and eulogized in poetrical expressions.
Later on, the “Quan Fang Bei Zu” was used as a blueprint for some famous books
in China, for example, the “Qun Fang Pu” and the “Guang Qun Fang Pu” all written
and compiled after its model. It is known today that in China there are only two
extant hand writting copies of it, one in Beijing Library, the other in the Library of
Yunnan University. Both of them are listed as the best national books. Outside China,
it is known that a third copy of is in the Congress Library in U.S.A. As for the ori-
ginal wood-carving copy printed during the period of the Song Dynasty, it is known so
far that one copy is kept in the Library of Culture Ministry of Japan. The Beijing
Agriculture Publishing House has made a decision to photograph this carved copy in
the Culture Ministry of Japan as one of the “Precious Series of China Agriculture
Science”. The book plays a very important role in the study of chinese botany, agri-culture science, medicine, history and literature. 相似文献
8.
罗桂环 《中国科学院研究生院学报》1985,23(6):476-482
“Quan Fang Bei Zu” is a compiled work mainly for folklores, poems and other literary works concerning some common plants with some botanical information in it. It is certainly not a pure botanical work, covering no more than 240 species of plants, and thus has little use as a reference book in indexing names even in a primitive sense. Therefore “Quan Fang Bei Zu” could not be considered as a botanical dictionary. Xu Wen-xuan and his co-workers’ argument that “Quan Fang Bei Zu” was the most perfect ancient botanical codes and records till then is not convincing. Actually “Tu Jing Ben Cao” is of higher value than the book under discussion from botanical point of view. 相似文献
9.
《中国科学院院刊(英文版)》2008,22(1)
With great care, Dr. ZHOU Zhonghe takes out a package wrapped by cotton tissue from a drawer and says: "This is the gem of our collections: the fossil of a bird that lived 125 million years ago!" Then, pointing at a tiny mound, he explains: "Look, this is the claw and that is the head. It was in the egg shell and ready to hatch ... The species fell into a family of waterside inhabitants." 相似文献
10.
This paper discusses the INAA results of REE in clays atand near some Permian/Triassic boundaries of South China.It showsthat the REE patterns of boundary clays differ from those of non-boundary clays.One difference is that the boundary clays are moreenriched in LREE,with steeper slope of REE and a smaller Eu nega-tive anomaly than the non-boundary clays.Another difference is that theboundary clays show a small Ce negative anomaly,but no Ce anomalyoccurs in the non-boundary clays.From these REE patterns and some other experimental facts,it isproposed that the P/T boundary clay may be a mixed product consistingof the acidic-intermediate ash and the upper crust substance representingsputtering component,and the calculated fraction of the former andlatter is 7/3. 相似文献
11.
《国家科学评论(英文版)》2014,(2)
<正>The highest good is like that of water.he goodness of water is that it beneits all the creatures;yet itself does not scramble,but is content with the places that all men disdain.It is this that makes water so near to Tao.—Tao Te ChingWATER IS IMPORTANT Water is a basic component of human existence,and people and ecosystems depend on it.It is one of the most fundamental requirements for the survival of 相似文献
12.
The Chinese medicine “Chuipencao” is studied. But, as a matter of fact, this
Chinese name represents two distinct forms, one with broad leaves and the other with
narrow leaves. As a result of a comprehensive study on gross morphology, pollen mor-
phology, histological structure, isozymes, GC analysis of chemical constituents of the
plants in question has shown that the narrow-leafed form is different from the broad-
leafed form and therefore is considered as a new species, Sedum angustifolium Z. B.Hu et X. L. Huang sp. nov. 相似文献
13.
14.
马尾树科的形态及分类系统位置的讨论 总被引：1，自引：0，他引：1
张芝玉 《中国科学院研究生院学报》1981,19(2):168-178
The present paper is devoted to a study of the basic morphological and anatomical
characteristics of the endemic family Rhoipteleaceae from China. The fundamental
pattern of the morphological and anatomical characteristics of the Rhoipteleaceae is
similar to those of the Juglandaceae in wood anatomy, resinous peltate scales, apetaly,
bicarpellate pistils, one-seeded fruits and exalbuminous seeds. Whereas Rhoipteleaceae
has stipules; perfect flowers with superior 2-loculed ovaries, anatropous ovules and two
integuments; vessel elements of the secondary xylem with the scalariform perforation,
and 2–8 (18) pores on the oblique plate being observable; vascular rays heterocellular
and tricolporate pollen. The above characteristics–at least most of them, agree
pretty well with those depicted by Manning in his “Pre-Juglandaceae”. It is quite
possible that the Juglandaceae is derived from “Pre-Juglandaceae”by way of the
Rhoipteleaceae, as the morphological and anatomical features as indicated above tend to
show that the Rhoipteleaceae is more primitive than Juglandaceae.
The Rhoipteleaceae was previously considered as related to the Betulaceae or
Ulmaceae, a view, which the present study does not prove to be acceptable. Both Takh-
tajan (1969) and Cronquist (1968) pointed out that the Juglandales, Urticales, Myrica-
les, Fagales are all direct derivatives from the Hamamelidales. However, since the
Rhoipteleaceae is simillar to the Betulaceae in wood anatomy and pollen, it seems that
there too could have certain relationships between the Rhoipteleaceae and the Betula-ceae in the course of evolution. 相似文献
15.
《中国科学院院刊(英文版)》2006,20(2):90-91
Opaque assemblages (OAs) were once thought to be “the oldest objects in the solar system.” After careful studies of OAs in primitive meteorites, a group of Chinese and US scientists have recently found that this is not the case. The scientists speculate… 相似文献
16.
Myosin X a member of the myosin super-family is the commonest protein in muscle cells contractile properties of muscles. However a recent study clearly shows that it plays a key role in the axonal growth path-finding during the development of nervous system.…… 《中国科学院院刊(英文版)》2007,21(2):88-89
Myosin X,a member of the myosin super-family,is the commonest protein in muscle cells and contractile properties of muscles. However,a recent study clearly shows that it plays a key role in the axonal growth and path-finding during the development of nervous system. 相似文献
17.
Fang Xin 《中国科学院院刊(英文版)》2003,17(3)
Reform is a process of insti-tutional changes, in which,at any stage, the character-istics of a given institutional arrange-ment must have its contextual logicand cognate inter-relations of mu-tual causality. Just as Douglass C.North points out: History is alwaysimportant and its importance lies notonly in the fact that we might takesomething valuable from the past,but that the present and future areto link the past via the continuity ofa societys institutional system. Thechoice of today and … 相似文献
18.
《中国科学院院刊(英文版)》2013,(2):88-90
BCAS： It is the first ime that an ISRSE symposium is held in China. What＇s your impression about this meeing？ Dr. Briggs： This is about the 7 th or 8 th of ISRSE meetings which I attended over the last 15 years or so. The Beijing meeting is very well organized and very efficient. The program is very good. There are a lot of high quality speakers. I＇m impressed by the way that the program is being put together by the overall organization in Beijing which is excellent. 相似文献
19.
一个原始的苔类的目——藻苔目在中国的发现 总被引：1，自引：0，他引：1
1961, a Japanese specimen of liverworts was named as Takakia lepidozioides by
Hattori and Inoue and they treated it to establish a new order Takakiales. 1963, “Le-
pidozia ceratophylla” was determined by Grolle as the second species of Takakia.
Hitherto, they were found in Japan, Malaysia, Nepal, Sikkim, Aleutian Island and the
Queen Charlotte Islands separately. 1980, 1982, Wang Mei-zhi collected Takakia lepi-
dozioides in the forest ground of Abies delavaya in Bomi and Zayii, Xizang. According
to it's features, it is apparet that Takakialens is the most primitive one in liverworts,perhaps it could be treated as a kind of “living fossil”. 相似文献
20.