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Made by Gomozov O.V.
Tabular information, being research of question of actuality of theme of master's work, is presented in this section. For this purpose the search of keywords and phrases was made in 6 searching servers
on April, 1, 2007
| Key phrase |
Yandex |
Google |
Yahoo |
Rambler |
Aport |
Altavista |
| digital filtration of signals |
1058 |
1070000 |
170000 |
947 |
496 |
170000 |
| modulation of frequency |
19717 |
17100000 |
3880000 |
33699 |
7952 |
3880000 |
| developing of IIR-filters |
1123 |
63100 |
11600 |
18 |
1839 |
11600 |
| developing of FIR-filters |
14 |
163000 |
64100 |
55 |
1824 |
64000 |
| quantizing of analog signal |
18275 |
961000 |
29100 |
1118 |
799 |
29000 |
| digital signal processor |
140442 |
53500000 |
7050000 |
65694 |
8529 |
7050000 |
| developing of filters is in MATLAB |
8 |
654000 |
118000 |
1695 |
7171 |
1118000 |
| filtration by 2nd order sections |
308 |
1210000 |
133000 |
170 |
272 |
133000 |
| automat of signalisation in mine |
4225 |
15800 |
23 |
0 |
2093 |
23 |
| MSCM |
1282 |
70900 |
45900 |
1331 |
231 |
45900 |
From a table evidently, that different searching servers have a different picture of coincidence of phrases. It is so possible to notice that Google and Rambler are selected, because they give out complete lists, greater part of references in which are not useful. As compared to the russian-language search it is possible to see a considerable difference, because the servers like Aport and Rambler are indexing the English-language sites worse then Altavista and Yahoo.
on May, 1, 2007
| Key phrase |
Yandex |
Google |
Yahoo |
Rambler |
Aport |
Altavista |
| digital filtration of signals |
1070 |
1071000 |
170300 |
1023 |
502 |
171800 |
| modulation of frequency |
20127 |
17107000 |
3880600 |
33841 |
7998 |
3883100 |
| developing of IIR-filters |
1291 |
64800 |
12300 |
21 |
1874 |
12100 |
| developing of FIR-filters |
17 |
164500 |
64700 |
63 |
1842 |
64800 |
| quantizing of analog signal |
18261 |
963000 |
29400 |
1194 |
826 |
29800 |
| digital signal processor |
140383 |
53501000 |
7051000 |
65798 |
8817 |
7057000 |
| developing of filters is in MATLAB |
12 |
656000 |
118900 |
1643 |
7194 |
1119000 |
| filtration by 2nd order sections |
358 |
1212000 |
133500 |
194 |
274 |
133700 |
| automat of signalisation in mine |
4238 |
15900 |
35 |
0 |
2143 |
41 |
| MSCM |
1291 |
71000 |
46200 |
1376 |
249 |
46500 |
Comparing to a previous table it is possible to trace the dynamics of change actuality of theme. A serious difference in indexes is not observed. Majority of them was multiplied, especially, obviously followings:"modulating frequencies", "digital signal processor", because they are the most vast and generalized themes. But there are some phrases, to which references is diminished . It is related to the update of bases of these searching servers. In the article of search better than all was Google, and after it follow Yandex , Yahoo, Altavista, Rambler, Aport
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