Eleventh International Conference on Road Transport Information and Control, 2002. (Conf. Publ. No. 486)
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End-to-end UMTS quality of service architecture for the support of real-time IP multimedia services in UMTS R5
Eleventh International Conference on Road Transport Information and Control, 2002. (Conf. Publ. No. 486) - - Trang 234-238 - 2002
3G promises to be an enabler for many new services: videoconferencing, interactive gaming, streaming, etc. Such applications are typically QoS (quality of service) sensitive. This requires new functionality in the UMTS QoS architecture. In 3GPP work on QoS is ongoing; the basic mechanisms are included in UMTS release 5, the more advanced features will be part of UMTS release 6. This document highl...... hiện toàn bộ
A parallel OPF approach for large-scale power systems
Eleventh International Conference on Road Transport Information and Control, 2002. (Conf. Publ. No. 486) - - Trang 161-166 - 2002
In this paper, the Newton-Krylov algorithm of power flow calculation is reviewed. A rectangular coordinate voltage formulation of nonlinear optimal power flow (OPF) is introduced and adopted into the unlimited point algorithm, and a Newton-Krylov algorithm similar to that of power flow calculation is proposed to solve the unlimited point transformed optimality conditions for the original OPF probl...... hiện toàn bộ
Switched reluctance machines with simple hoop windings
Eleventh International Conference on Road Transport Information and Control, 2002. (Conf. Publ. No. 486) - - Trang 522-527 - 2002
Switched reluctance machines are usually constructed with coils wrapped around radial poles. The MMF of these coils causes a magnetic flux to flow radially up the poles, returning circumferentially through rotor and stator core backs. As the pole number is increased then the number of coils rises but, due to decreasing space per coil, the MMF per coil falls, so that increasing the pole number does...... hiện toàn bộ
Creating a successful payment architecture [mobile data services]
Eleventh International Conference on Road Transport Information and Control, 2002. (Conf. Publ. No. 486) - - Trang 376-381 - 2002
The introduction of GPRS and UMTS data services for mobile operators greatly increases the complexity of payment solutions since services can no longer be charged on simple duration basis but have to be tailored to the value of service being offered. At the same time, payment schemes need to be affordable and easy to understand for commercial success. The paper describes Nortel Networks' view of t...... hiện toàn bộ
Electronic vehicle identification for road traffic information and enforcement
Eleventh International Conference on Road Transport Information and Control, 2002. (Conf. Publ. No. 486) - - Trang 20-24 - 2002
Electronic Vehicle Identification (EVI) is a future means of uniquely identifying and communicating electronically with road vehicles. The use of EVI has the potential to greatly improve the identification of vehicles over current methods and uses a wireless communication link to read data held in an electronic format within a vehicle. The next decade will undoubtedly see an increase in the applic...... hiện toàn bộ
Single-phase neutral point diode clamped rectifier with high input power factor
Eleventh International Conference on Road Transport Information and Control, 2002. (Conf. Publ. No. 486) - - Trang 421-426 - 2002
A new control scheme for the single-phase neutral point diode clamped rectifier is proposed to achieve a unity power factor, balanced neutral point voltage and constant DC bus voltage. Four power switches are used in the proposed rectifier to generate a three-level PWM waveform on the rectifier terminal voltage. The line current command is derived from a DC link voltage regulator and an output pow...... hiện toàn bộ
Squirrel cage rotor faults detection in induction motor utilizing stator power spectrum approach
Eleventh International Conference on Road Transport Information and Control, 2002. (Conf. Publ. No. 486) - - Trang 133-138 - 2002
Early detection of abnormalities in the motor will help avoid expensive failure. It has been shown that rotor faults such as broken rotor bars can be detected by several methods. This paper deals with the application of the spectral analysis of the instantaneous power for the detection of rotor cage faults in operating three phase induction motors. This approach carries more information than that ...... hiện toàn bộ
Độ chính xác và khả năng nghe của vị trí di động trong mạng GSM và CDMA Dịch bởi AI
Eleventh International Conference on Road Transport Information and Control, 2002. (Conf. Publ. No. 486) - - Trang 350-354 - 2002
Chúng tôi nghiên cứu các vấn đề gặp phải trong việc xác định vị trí di động (PL) trong các mạng di động. Hai vấn đề chính là độ không chính xác của vị trí được ước lượng và khả năng nghe của thiết bị PL, tức là khả năng nhận đủ tín hiệu từ ít nhất 3 trạm phát sóng (BS) để ước lượng vị trí của nó. Công trình của chúng tôi dựa trên kỹ thuật xác định vị trí theo khoảng thời gian xuống (TDOA) được đề ...... hiện toàn bộ
#vị trí di động #xác định vị trí di động #GSM #CDMA #TDOA #NLOS #IPDL
Roaming between satellite and terrestrial networks
Eleventh International Conference on Road Transport Information and Control, 2002. (Conf. Publ. No. 486) - - Trang 58-63 - 2002
The ETSI proposed S-UMTS system is intended to provide an important overlay to terrestrial 3rd generation networks. S-UMTS is specifically targeted at providing services in remote regions, or potentially just as important, when out of coverage of the subscriber's home network or a network with a suitable roaming agreement. Thus, satellite/terrestrial interoperability is a key issue to enable subsc...... hiện toàn bộ
Multi-variable torque optimization for small spindle motors based on reduced-basis finite element formulation
Eleventh International Conference on Road Transport Information and Control, 2002. (Conf. Publ. No. 486) - - Trang 269-274 - 2002
A new technique for the optimisation of designs has been applied for the determination of a spindle motor design in relation to its cogging torque. The methodology of the formulation has been described. This procedure has been used to optimise design parameters of a spindle motor. Results show clearly the advantage of using reduced order formulation over a direct finite element application to such...... hiện toàn bộ
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