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. Derkach Aleksey Anatolievich .

Derkach Aleksey Anatolievich
master of gr. IUS-06m of faculty "Computer information technologies and automatics"
Master work theme: " Development of the computerized subsystem of automatic focusing of an optical microscope."
Scientific leader: doc. of department ASU, Privalov M.V.

e-mail: adtemp[гав]mail.ru
ICQ #2294838ICQ Status

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     For writing of master's degree work it is necessary to study the great number of different reasons, documents, articles. Most materials are in free access in the Internet. For an information retrieval in the World spider web utillize searching sites.

     The complex of the programs, providing functionality of the searching system, is named by a searching rendering-engine or searching machine. Basic performance searching machine measures are relevance, plenitude of base, account of morphology of language. Indexation of information is carried out the special searching robots. Improvement of work of the searching systems - it one of priority tasks of the today's Internet.

     For an information retrieval I utillized the followings searching systems:
1. google.com.ua
2. yandex.ru
3. yahoo.com
4. rambler.ru
5. msn.com
6. meta.ua
7. aport.ru
8. altavista.com

     In a table 1 a report is resulted on a search in the Internet after 06.04.2007:

Words | Searcher

Компьютеризированная подсистема автоматической фокусировки оптического микроскопа

5

1

0

0

0

0

526

0

система автоматической фокусировки оптического микроскопа

23900

101

33

325

16

54

285

33

автоматическая фокусировка оптического микроскопа

24800

176

13

966

8

55

324

14

фокусировка изображения

845 000

96 786

250 000

14 810

31 302

1521

3933

250 000

алгоритмы и методы фокусировки изображений

25 000

698

308

2114

230

186

321

311

system of automatic focusing for optical microscope

949 000

2622

66 300

29

14 333

10

196

64 700

autofocusing image

148 000

29 332

80 800

140

13 290

26

232

79 800

methods and algorithms of image focusing

1 910 000

7531

544 000

1548

71 537

131

1133

545 000


     In a table 2 a report is resulted on a search in the Internet after 02.06.2007:

Words | Searcher

Компьютеризированная подсистема автоматической фокусировки оптического микроскопа

5

1

0

0

0

0

5998

0

система автоматической фокусировки оптического микроскопа

28800

126

27

315

15

698

297

26

автоматическая фокусировка оптического микроскопа

30 300

256

13

1001

6

1249

373

13

фокусировка изображения

1 160 000

134 358

223 000

15 906

29 451

1677

3797

224 600

алгоритмы и методы фокусировки изображений

32 800

802

276

2199

29 451

2058

294

279

system of automatic focusing for optical microscope

919 000

2578

62 600

28

13 848

108

431

62 500

autofocusing image

130 000

37 583

86 200

144

13 646

4

121

86 000

methods and algorithms of image focusing

2 110 000

10 136

533 000

1654

71 322

763

996

533 000

A red color is mark those results which for last period was increased.
Dark blue a color is mark those results which diminished for last period.

     We will analyse the got results. We will mark first, that searching system Aport differs the unauthenticity of results of search. Pre study of results of search from this searching system a lot of garbage was noticed - documents, not proper a query. At a search in Russian language it is possible to mark leading of Google as compared to Yandex (other searching systems are shown by worst results), although exactly Yandex is positioned as the best searching system of Runet. Leading of Google in a search in English language does not cause doubts. There is Yahoo on the second place (it is although needed to mark that the results of search on Yahoo very close coincide with the results of Altavista).

     Analysing the change of results of search for 2 months it is possible to notice the row of facts:
1.Increase of number of documents, found the searching system Meta. It can testify that this searching system makes active indexation of new resources.
2.Increase of general number of documents, found in the Internet. It testifies to popularity of subject of my master's degree work.
3.At a search in English language for some queries the decline of number of the found documents notedly in the search engines of Google, Yahoo, Altavista. To my mind, it is conditioned that happened re-indexed bases of these sites and from it already not existing in a network sites were remote. I.e. now results of search will be more reliable, as will not contain "dead" links.

     Analysing the results of search, I came to the followings conclusions:
1.Most exact and meaningful results at a search the searching system of Google gives in the Internet.
2.At a search in the Russian segment of the Internet it is also possible to utillize the searching system Yandex, which can give out documents which are not given (or gives out not in the first rows) out by Google often.
3.At an information retrieval in a network the Internet very much vazhnno is correct drafting of searching query. If to spare it more attention, it is possible to get more exact and ponderable results at a search.

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