Gas is transported through a large network of pipes which are operated over a wide range of pressures. Within these networks are many elements which ensure that all the necessary working conditions are met. An importa...
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Gas is transported through a large network of pipes which are operated over a wide range of pressures. Within these networks are many elements which ensure that all the necessary working conditions are met. An important role is played by valves which can perform a variety of functions. A valve and actuator arrangement, which is used to throttle gas from streams found on offshore platforms, is considered. A diagnostic system which will detect and isolate specific faults is developed. British Gas supplied data of step tests from four different valves but additional data was required for the diagnostic procedure. A mathematical model of the system was derived using mathematical relationships and established laws which were interpreted in Matlab/Simulink.
A major programme of research, development and trials was launched by the United Kingdom government to identify the capabilities of existing technology and to draw up a specification for a fully electronic motorway ch...
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A major programme of research, development and trials was launched by the United Kingdom government to identify the capabilities of existing technology and to draw up a specification for a fully electronic motorway charging system. A complete toll payment system comprises two major sub-systems: the Tolling Transaction Subsystem;and the Enforcement Subsystem. The paper addresses some of the issues raised, and gives an overview of the Siemens approach to free-flow multi-lane motorway tolling through the infra-red technology, and then focuses on a key aspect of road tolling and pricing systems - enforcement.
The Analytical Process control (APC) System, installed on the No.5 Electrolytic Tinplating Line (ETL) at British Steel Tinplate's Trostre Works, South Wales, is discussed. The APC System aims to provide automatic ...
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The Analytical Process control (APC) System, installed on the No.5 Electrolytic Tinplating Line (ETL) at British Steel Tinplate's Trostre Works, South Wales, is discussed. The APC System aims to provide automatic solution sampling to achieve on-line real-time analysis and closed-loop control of the process solutions used on the No.5 ETL. Consideration is being given to extending the APC System to embrace the No.4 ETL. The APC System also has the potential to be developed to allow the robot to automatically decide to override the sequence of sampling and priorities when solutions fall outside the quality control analysis range and carry out more frequent sampling of these specific solutions until they are brought back within specification.
The Advanced Computer Architecture Group at York has initiated the Advanced Uncertain Reasoning Architecture (AURA) project which aims to develop a new class of architecture for integrated symbolic and sub-symbolic pr...
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The Advanced Computer Architecture Group at York has initiated the Advanced Uncertain Reasoning Architecture (AURA) project which aims to develop a new class of architecture for integrated symbolic and sub-symbolic processing. These architectures will be based on a class of neural network called binary correlation matrix memory (CMM). The approach adopted supports optimal associative memory mappings, which are robust in the presence of noisy or imperfect inputs, and offer considerable flexibility in the representation of knowledge. An example of how AURA can provide anytime functionality in real time identification has been described.
The development and evaluation of Generalised Predictive control (GPC) for on-line administration of muscle relaxant drugs in operating theatre is described. The necessary software was transferred into the operating t...
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The development and evaluation of Generalised Predictive control (GPC) for on-line administration of muscle relaxant drugs in operating theatre is described. The necessary software was transferred into the operating theatre at two sites where successful trials were performed. Excellent regulation has been achieved, and the GPC algorithm displayed good robustness properties against disturbances such as surgical diathermy. The work was extended later to the multivariable case involving simultaneous control of muscle relaxation, and unconsciousness using blood pressure monitoring. While preliminary results are very encouraging, it is hoped to conduct more clinical trials using this system to establish its robustness especially over a wide spectrum of patients whose dynamics vary on a 1:4 ratio.
Understanding of queue build up and decay and its knock on effects on journey times necessitates accurate information on road conditions. This can be achieved using some of the many vehicle detection devices on the ma...
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Understanding of queue build up and decay and its knock on effects on journey times necessitates accurate information on road conditions. This can be achieved using some of the many vehicle detection devices on the market today. This paper describes a method to determine journey times, speeds and queue status using VHS Camcorders at 12 positions a long a four lane urban carriageway in Southampton. The information collected is used to validate other calculations of link journey time and delay made using single loop detectors fitted along the same stretch of road.
With the advent of mobilecomputing devices and cheap location sensing systems, location information has become an important resource both for mobile and 'desktop' users. We describe some key concepts a scalab...
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With the advent of mobilecomputing devices and cheap location sensing systems, location information has become an important resource both for mobile and 'desktop' users. We describe some key concepts a scalable ubiquitous location service should be based on. Firstly, we show how such a service can accommodate multiple location sensing systems. Secondly, we discuss hierarchy-based access control policies as flexible and powerful mechanisms to protect users' privacy. Thirdly, we describe server federation as a means to incrementally build a global location service.
Emergencies such as air or rail accidents or those brought about by severe weather make great demands on communications both within and between emergency services including the police, ambulance and fire services. Res...
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Emergencies such as air or rail accidents or those brought about by severe weather make great demands on communications both within and between emergency services including the police, ambulance and fire services. Research has shown that inter-personal communications can be improved by providing support for a range of information technologies to be used alongside, or instead of, conventional speech communication. The TETRA European private mobile radio standard provides facilities for networked digital voice and data transmission and is a good candidate on which to build an infrastructure to support these types of applications. Efficient networking is dependent on new protocols which not only work for a wide range of media types but also take into account the data transfer requirements of each particular application. These applications, their associated protocols, and support services will be integrated into a quality-of-service (QoS) architecture (QoS-A) which will provide a framework for monitoring and controlling resources within the system. This paper describes some of the basic building blocks upon which some of these concepts will be tested.
The proceedings contains 7 papers. Topics discussed include electric busbars, intelligent control, intelligent networks, actuators, valves, user interfaces and controlapplications.
The proceedings contains 7 papers. Topics discussed include electric busbars, intelligent control, intelligent networks, actuators, valves, user interfaces and controlapplications.
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