This presentation is the property of its rightful owner.
Sponsored Links
1 / 83

文献计量学 PowerPoint PPT Presentation


  • 75 Views
  • Uploaded on
  • Presentation posted in: General

文献计量学. 中国中医科学院中医药信息研究所 李 海 燕. 文献计量学( bibliometrics ) 1969 年,美国目录学家 ,Alan Pritchard :将数学和统计学的方法运用于图书及其他交流介质的研究的一门学科。 科学计量学( scientometrics ) 1968 年,前苏联学者提出:关于科学技术进步的计量研究 情报计量学( informetrics ) 1979 年 , 德国, otto nacke. 目前发展的趋势. 从文献计量向情报计量发展

Download Presentation

文献计量学

An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -

Presentation Transcript


6395736


6395736

bibliometrics

1969,Alan Pritchard

scientometrics

1968

informetrics

1979,otto nacke


6395736

  • -- : (46.4%);; ;.

    -- :\->

  • -- \

    --


6395736


6395736

6%~8%

CA 100

1. 32(1907~1938)

2. 18

3. 8

4. 4.75

5. 3.3

6. 2


6395736

  • 5%20%-80%


6395736

  • 1 /()

    2 /

  • ,1949,,

F(t)

t


6395736

  • F(t)=aebt (a>0,b>0)

    a:

    b:

  • :()

  • : 8-9

    :2-3


6395736

  • ,.

    1952-1982 ,20

    1907-1977 ,10


6395736

  • --

    --

    --


6395736


6395736

F(t)

K/2

A

t


6395736

  • 1965-1975


6395736

1

2

dN / dt = bN(k N) dN / dt = bN


6395736

  • 3


6395736

4

  • (/ / )

  • ,


6395736

  • -


6395736

  • n2 n n


6395736

  • ,,,.

  • ///


6395736

1954

1958

1962

1966

1970

1950


6395736

1.

,

,Gosnell,1944


6395736

2.


6395736

3.


6395736

1.

  • kent61968-19757

    1

    2

  • 1

    2


6395736

  • 1988

1988

1980

1970

1960

1950

1940

1930


6395736

  • 1960402500SCI

1960

1965

1970

1975

1980

1985

1990


6395736

2.

1

  • C (t ) = Co e -bt = K e -bt

  • SCI

  • f ( x) = be -bx

  • F (t ) = 1 -- e -bt

  • a = e -b


6395736

2- y = 1-- ( a/e x + b/ e 2x ) ( a + b = 1 )

3 y = 1-- (a / e x-0.1 + b / e 2x-0.2 ) (a + b = 1)


6395736

1.

  • 200820030001985-200515001985-199510


6395736

  • SCI

    2.


6395736

3.

  • P=5*100%

  • P

    4.

  • a = e -b


6395736

  • 1

    2


6395736


6395736

1. SC18781948

2 .1/31/31/3


3 1 5 5 2

3. 1552


6395736

4.


6395736

5.

  • n1 : n2 : n3 = 1 : a : a2

    n1 : ( n1 + n2 ) : ( n1 + n2 + n3 ) = 1 : A : A2


6395736

1.

n1 : ( n1 + n2 ) : (n1 + n2 + n3 ) : = 1 : b : b2 .

2.

F ( x ) = ln (1 + Bx ) / ln ( 1 + B )

B


6395736

3.

a n B ( 1 < n < C )

R ( n ) = {

k ln n / s ( C < n < N )

1NN = K N

2S


3 a r 1 1

3A = R(1) 1

C B

K

1.

2.

3.

4.


6395736


6395736

1.

f r = C r -1

f r = n r / N

r

2.

,

3.


6395736

4.

f r r = C

5.


6395736

1.

f r . r B = C

2.

f r ( r + m ) B = C

M

B

M = 0 B = 1


6395736

3.

1

2

3

I1/D


6395736

1.

2.

3.

4.

Pr =A/r (A

0.1),


6395736

  • 1.

    795025484

    2.10MeSH43


6395736

  • ()

  • 1926the frequency distribution of scientific productivity,


6395736

1. :

  • ()\(CA)

  • .

    2

    • lnfx = -2lnx + lnC

    • fx = C / X2

  • XfxX


  • 6395736

    C C = 0.6079

    fx = 0.6079 / X2

    C f1160%.


    6395736

    • f(1)=z1/z=c f(n)= zn/z=c/n2 f(n)/f(1)=zn/z1=1/n2

      n11/ n2, 160%.


    6395736

    • :

      1.

      2. ,(),

      3.,.


    6395736

    1


    6395736

    2

    fx = C / Xa (1.2 < a < 3.8


    6395736

    3

    1969

    250010000500050

    N 0.5


    6395736

    A=a1/a2A<0.5

    0.5<A<2

    A>2

    A/N A:N:

    C/N C:

    C/N A/N


    6395736

    • 1/4,

    • D=d1/d2


    6395736


    6395736

    1.

    Reference

    Citation

    • 2.


    6395736

    3.

    .


    6395736

    .

    .

    (SCI)

    (JCR)


    6395736

    SCI

    1. (SCI,science citation index)

    • 1961SCI1004000

    • SCI-E ,60001945

    • 1979JCR


    6395736

    2.

    ESI (Essential science indicators)

    • 2001ISISCI,SSCI,8500

    • 22


    6395736

    • ESI

      5/30010

      3000/100101%

      2


    6395736

    • CSCD

      1989,20021000670,

    • (CSTPC)

      1989

    • CSSCI

      199841917


    6395736

    • 2002600

    • CNKI,


    6395736


    6395736

    • SCI:75%1000500SCI70%

      CSCI:3%;25%90%;75%72


    6395736

    1972 / JCR

    /

    /

    /


    6395736

    JCR

    • JCR

    • JCR

    • JCR


    6395736

    . JCR

    1-2JCR ()


    6395736

    .

    1.

    2.

    3.

    .


    6395736

    1963kessler,

    :

    1973


    6395736

    1972 SCI


    6395736

    .

    • .

    • .

      .


    Webometrics cybermetrics

    Webometrics ,Cybermetrics


    6395736

    • 199519992000


    6395736


    6395736


    6395736


    6395736

    • 2002.4

      2. 2007.1


    6395736


  • Login