Ключаров, В. С. Энергетические характеристики молекулярно-вязкостных вакуумных насосов [Электронный ресурс] / В. С. Ключаров, Н. К. Никулин, Е. В. Свичкарь. — Электрон. текстовые дан. (1 файл : 713 Кб) // Научно-технические ведомости СПбПУ. Сер.: Естественные и инженерные науки = St. Petersburg polytechnic university journal of engineering science and technology / Санкт-Петербургский политехнический университет Петра Великого. – 2019. – Т. 25, № 1 [Электронный ресурс]. — Загл. с титул. экрана. — Электронная версия печатной публикации. — Свободный доступ из сети Интернет (чтение, печать, копирование). — Текстовый файл. — Adobe Acrobat Reader 7.0. — <URL:http://dx.doi.org/10.18721/JEST.25103>. — <URL:http://elib.spbstu.ru/dl/2/j19-268.pdf>.
|
Period
|
Read
|
Print
|
Copy
|
Open
|
Total
|
|
Year 2019
|
Quarter 3
|
September
|
3
|
0
|
1
|
0
|
4
|
|
Quarter 4
|
October
|
6
|
0
|
3
|
0
|
9
|
|
November
|
0
|
0
|
0
|
0
|
0
|
|
December
|
0
|
0
|
3
|
0
|
3
|
|
Year 2020
|
Quarter 1
|
January
|
0
|
0
|
0
|
0
|
0
|
|
February
|
0
|
0
|
2
|
0
|
2
|
|
March
|
6
|
0
|
6
|
0
|
12
|
|
Quarter 2
|
April
|
4
|
0
|
0
|
0
|
4
|
|
May
|
2
|
0
|
0
|
0
|
2
|
|
June
|
3
|
0
|
0
|
0
|
3
|
|
Quarter 3
|
July
|
1
|
0
|
0
|
0
|
1
|
|
August
|
0
|
0
|
0
|
0
|
0
|
|
September
|
6
|
0
|
0
|
0
|
6
|
|
Quarter 4
|
October
|
2
|
0
|
2
|
0
|
4
|
|
November
|
3
|
0
|
10
|
0
|
13
|
|
December
|
1
|
0
|
13
|
0
|
14
|
|
Year 2021
|
Quarter 1
|
January
|
3
|
0
|
5
|
0
|
8
|
|
February
|
4
|
0
|
2
|
0
|
6
|
|
March
|
0
|
0
|
2
|
0
|
2
|
|
Quarter 2
|
April
|
0
|
0
|
2
|
0
|
2
|
|
May
|
0
|
0
|
3
|
0
|
3
|
|
June
|
6
|
0
|
4
|
0
|
10
|
|
Quarter 3
|
July
|
4
|
0
|
9
|
0
|
13
|
|
August
|
3
|
0
|
3
|
0
|
6
|
|
September
|
2
|
0
|
2
|
0
|
4
|
|
Quarter 4
|
October
|
0
|
0
|
0
|
0
|
0
|
|
November
|
0
|
0
|
6
|
0
|
6
|
|
December
|
2
|
0
|
0
|
0
|
2
|
|
Year 2022
|
Quarter 1
|
January
|
3
|
0
|
2
|
0
|
5
|
|
February
|
2
|
0
|
0
|
0
|
2
|
|
March
|
3
|
0
|
8
|
0
|
11
|
|
Quarter 2
|
April
|
0
|
0
|
1
|
0
|
1
|
|
May
|
0
|
0
|
0
|
0
|
0
|
|
June
|
1
|
0
|
1
|
0
|
2
|
|
Quarter 3
|
July
|
10
|
0
|
3
|
0
|
13
|
|
August
|
4
|
0
|
5
|
0
|
9
|
|
September
|
1
|
0
|
0
|
0
|
1
|
|
Quarter 4
|
October
|
1
|
0
|
0
|
0
|
1
|
|
November
|
5
|
0
|
0
|
0
|
5
|
|
December
|
1
|
0
|
7
|
0
|
8
|
|
Year 2023
|
Quarter 1
|
January
|
1
|
0
|
2
|
0
|
3
|
|
February
|
2
|
0
|
0
|
0
|
2
|
|
March
|
1
|
0
|
2
|
0
|
3
|
|
Quarter 2
|
April
|
0
|
0
|
0
|
0
|
0
|
|
May
|
2
|
0
|
2
|
0
|
4
|
|
June
|
0
|
0
|
1
|
0
|
1
|
|
Quarter 3
|
July
|
3
|
0
|
4
|
0
|
7
|
|
August
|
1
|
0
|
1
|
0
|
2
|
|
September
|
1
|
0
|
3
|
0
|
4
|
|
Quarter 4
|
October
|
0
|
0
|
3
|
0
|
3
|
|
November
|
3
|
0
|
3
|
0
|
6
|
|
December
|
1
|
0
|
0
|
0
|
1
|
|
Year 2024
|
Quarter 1
|
January
|
2
|
0
|
3
|
0
|
5
|
|
February
|
0
|
0
|
2
|
0
|
2
|
|
March
|
1
|
0
|
2
|
0
|
3
|
|
Quarter 2
|
April
|
6
|
0
|
5
|
0
|
11
|
|
May
|
2
|
0
|
0
|
0
|
2
|
|
Total
|
118
|
0
|
138
|
0
|
256
|
