Eleventh International Conference on Road Transport Information and Control, 2002. (Conf. Publ. No. 486)
0537-9989
Cơ quản chủ quản: N/A
Các bài báo tiêu biểu
Forecasting real-time ratings for electricity distribution networks using weather forecast data
- Trang 1-4
Currently the operators of electrical distribution networks face a number of challenges, such as load growth, the proliferation of distributed generation and ageing infrastructure. This is drawing attention to techniques which will allow more efficient asset utilisation and facilitate network dynamic management. Power system component real-time ratings are a cost effective solution for increasing ......
Creating a successful payment architecture [mobile data services]
- 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......
Information architectures for next generation car park services
- Trang 74-77 - 2002
The car parking business must focus on customer service. This will progressively be about providing better information about spaces available and services to find the car park; for example, signs that light up to indicate the number of spaces available in a car park some way away. The common database architecture supports developing customer service and more cost effective monitoring for multivend......
High resolution DOA estimation technique for uplink TDD mode
- Trang 409-413 - 2002
This paper investigates a maximum likelihood (ML) approach for direction of arrival (DOA) estimation based on the algorithm suggested by the 3GPP for scalar channels in UTRA-TDD mode. The performance of the algorithm is assessed by resorting to simulations in typical UMTS scenarios. The results indicate that the proposed scheme overcomes the limitation of the angular resolution inherent to classic......
Multiple input multiple output (MIMO) radio channel models
- Trang 414-417 - 2002
In this paper we present a geometrically based stochastic model implementation of a MIMO radio channel model. This is based on a 3D two bounce model. The model is designed to be dependent on parameters associated with the deployment scenario rather than being based on any stochastic radio channel information.
Redefining user input on handheld devices
- Trang 388-393 - 2002
In migrating users to 3G applications, developers, device manufacturers and network operators are asking the public to believe in the wireless Internet. While improvements have been made in many areas, we believe that the user input methods are a remaining inhibitor. Devices have continued to get smaller, while at the same time require more functionality. We present a technology called the Fastap ......
Implementation of CLAIRE, traffic estimation and prediction system, and adaptive traffic control in the US
- Trang 95-99 - 2002
Over the years, the Federal Highway Administration Research, Development and Technology (FHWA RD&T) has been developing hardware and software tools that will mitigate congested traffic conditions. Some of these tools include the two traffic estimation and prediction system (TrEPS) prototypes and the four traffic adaptive signal control system prototypes. In addition, FHWA has acquired CLAIRE from ......
Permanent magnet brushless motors for industrial variable speed drives
- Trang 650-654 - 2002
The paper describes aspects of product design optimization and manufacturing technology development for PM brushless motor drives specific to industrial applications. Low speed direct drive motors with high specific torque have been built using a high polarity flux concentrating rotor design with radial ferrites. High efficiency and/or reduced size synchronous motors, rated at 1500 rpm and higher,......
Remedial operating strategies for standard 3-phase induction motor drives
- Trang 116-121 - 2002
This paper presents a study regarding the performance of a standard three-phase induction motor fed by a voltage source inverter, controlled by the most recent control techniques such as field oriented control, direct torque control and fuzzy logic space vector modulation. With this work, the authors intend to analyze which of these control techniques better fit into a remedial operating strategy,......
Predictive power control for S-UMTS based on least-mean-square algorithm
- Trang 128-132 - 2002
In order to exploit the presence of non-zero autocorrelation between consecutive samples of channel variations, predictive schemes based on a recursive least squares (RLS) adaptive algorithm have been proposed. The main motivation for using RLS is its fast convergence property. The RLS algorithm places enormous computational burden on the transmit power control system. In slow power control, howev......