hfc造句
1. Hydrofluorocarbon - HFC: A substitute for chlorofluorocarbons.
2. HFC ( Hybrid Fiber Coax ) provides a kind of broadband access way for multimedia and broadband services.
3. HFC - 245 fa ( 1,1, 1,3, 3 - pentafluoropropane ) is one of the substitute compounds for CFC, HCFC.
4. On the basis of analyzing HFC and EPON, the method of digital television transmission over EPON is proposed.
5. The preparation of HFC - 32 by catalytic hydrogenation of CFC - 12 was explored.
6. The HFC - based ATM network is supported by the ATM nodal switching, user terminal unit and headend unit.
7. HFC ( Hybrid Fiber Coax ) access network is attached great importance because of its tremendous bandwidth and relative economy.
8. Due to the HFC network's tree topology, large service area and great round trip delay, it is an issue worth researching when we design the MAC (Media Access Control) protocol in HFC networks.
9. Applications : XDSL , HFC , Home PNA , STB , Cable modem etc.
10. The HFC (hydrofluorocarbon) refrigerant currently used in virtually every American model car and truck, HFC-134a, has a GWP of 1, 400 compared to the new refrigerant's (HFC-1234yf) GWP of just four.
11. Hybrid Fiber Coax ( HFC ) networks are considered a promising infrastructure of broadband access network.
12. Hydraulic fluid power. Fluids. Measurement of filtrability of HFC and HFD class fire resistant fluids.
13. The advent of HFC network infrastructure established the bidirectional basis of CATV network.
14. However , the HFC —134 a refrigerator consumed about 4％ more electricity than the CFC —12 refrigerator.
15. The paper mainly introduces the design project of HFC forward transmission network in Antu County, including scheme, technique index and system index testing of optical cable transmission network.
16. The improvement field emission by Hf coating on CNTs surface is attributed to the low work function, chemical inertness and good conductivity of HfC.
17. At last, we shall discuss how to emulate the transmission model with software in HFC.
18. In order to solve the environment damaging problem of the CFC as far as possible, HCFC and HFC as the replacements for CFC have been developed and some of them have been applied.
19. This paper summarizes some understanding and experience of two - way HFC network design and transmission system debugging.
20. This paper describes the protocol hierarchy governing the device layer, physical layer, MAC layer and application layer of HFC network management system, utilizing the IEC(SCTE HMS) standard model.
21. The truncated binary exponential back-off CRA(Collision Resolution Algorithm) has been widely applied in random multi-access channel, such as LAN and HFC.
22. This paper describes Hunan district - country multimedia video conference system based on HFC.
23. Experimental results demonstrate that the given system has received perfect performance in maintenance of reverse channel of HFC.
24. It compares the technological economy ratio and practical applicability of HFC, HDSL, ADSL and FTTC.
25. This paper presents an introduction to the network structure, transmission method, frequency spectrum distribution scheme, modulation and multiaddress connection technology concerning HFC.
26. This thesis studies the properties and data transmission technologies of the upstream channel of HFC - CATV networks.
27. Considering for local current situation of network in CangZhou city, mainly analyzed constructing standard and implementary scheme of HFC cable distribution system two-way transformation.
28. The noise characteristics and the - interference techniques of the HFC - CATV upstream channel are studied in this thesis.
29. By the new method, the intermolecular potential  parameters of HFC 125 was determined.
30. In this paper , we briefly describe the state - of - the - art and future trends of the Coax ( HFC ) network.
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