Water quality in an enclosed sea is chronically bad since the pollution load is much higher than the natural purification capacities. An artificial lagoon is one of the water purification systems applicable to the enc...
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Water quality in an enclosed sea is chronically bad since the pollution load is much higher than the natural purification capacities. An artificial lagoon is one of the water purification systems applicable to the enclosed sea. the purpose of this paper is to clarify the water purification mechanism of the artificial lagoon, and to quantitatively estimate the carbon and nutrient fixation effects using an ecosystemmodeling technique. the results of estimations show that the carbon and nutrient fixation effects by seaweed is large and the total fixation effects decreases year by year because of the accumulation of the sedimentary organic matter.
Presents the recent modeling and simulation of the International Civil Aviation Organization (ICAO) very high frequency (VHF) digital link (VDL) Mode 3 subnetwork in an Aeronautical Telecommunication Network (ATN) env...
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Presents the recent modeling and simulation of the International Civil Aviation Organization (ICAO) very high frequency (VHF) digital link (VDL) Mode 3 subnetwork in an Aeronautical Telecommunication Network (ATN) environment for the en route and terminal domains. this was conducted to study the performance of this subnetwork under various aircraft and application traffic loading conditions. Important questions to be answered include the connection and data transfer delays.
作者:
Martin, L.Rutgers University
School of Engineering Department of Industrial Engineering Piscataway NJ United States
the increase in air traffic over the oceanic airspace and the ever rising cost of fuel prompted the investigation of the reduction of separation standards on and between flight tracks so as most, if not all aircraft, ...
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the increase in air traffic over the oceanic airspace and the ever rising cost of fuel prompted the investigation of the reduction of separation standards on and between flight tracks so as most, if not all aircraft, operating on the tracks realize their optimum flight paths that minimize fuel consumption. this paper summarizes the work that investigates the effect of proposed reductions in vertical and longitudinal separation between aircraft operating in the Western Atlantic Route system (WATRS). the principal effect of concern is aircraft fuel consumption. Currently aircraft are required to maintain a vertical separation of 2000 ft. when assigned to the same route, the proposed vertical separation standard is 1000 ft;similarly aircraft pairs operating on the same route and flight level are separated by 15 minutes, a reduction to 10 minutes is investigated [2]. We model and simulate the air traffic over the WATRS region under different separation scenarios. optimization algorithms are developed to determine the optimum flight plan for every aircraft operating in the region. Comparisons of fuel consumption under these scenarios are conducted. the initial results of this research show that the proposed Reduced Vertical Separation Minimum (RVSM) results in a significant reduction in fuel consumption when compared with current separation standards.
system and software requirements are inextricably intertwined, yet the challenge of extracting software requirements from system requirements is often an exercise in frustration. We propose an extension of the four-va...
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system and software requirements are inextricably intertwined, yet the challenge of extracting software requirements from system requirements is often an exercise in frustration. We propose an extension of the four-variable model originally developed by Parnas and Madey that clarifies how system requirements can be allocated between hardware and software. this extension organizes the software so that it traces clearly and directly to boththe system and hardware requirements. An attractive aspect of this paradigm is that it is consistent with object-oriented approaches and allows the system requirements to be organized to facilitate object-oriented software development.
the increase in air traffic over the oceanic airspace and the ever rising cost of fuel prompted the investigation of the reduction of separation standards on and between flight tracks so as most, if not all aircraft, ...
详细信息
the increase in air traffic over the oceanic airspace and the ever rising cost of fuel prompted the investigation of the reduction of separation standards on and between flight tracks so as most, if not all aircraft, operating on the tracks realize their optimum flight paths that minimize fuel consumption. this paper summarizes the work that investigates the effect of proposed reductions in vertical and longitudinal separation between aircraft operating in the Western Atlantic Route system (WATRS). the principal effect of concern is aircraft fuel consumption. Currently aircraft are required to maintain a vertical separation of 2000 ft. when assigned to the same route, the proposed vertical separation standard is 1000 ft; similarly aircraft pairs operating on the same route and flight level are separated by 15 minutes, a reduction to 10 minutes is investigated. We model and simulate the air traffic over the WATRS region under different separation scenarios. optimization algorithms are developed to determine the optimum flight plan for every aircraft operating in the region. Comparisons of fuel consumption under these scenarios are conducted. the initial results of this research show that the proposed Reduced Vertical Separation Minimum (RVSM) results in a significant reduction in fuel consumption when compared with current separation standards.
GEOSTAR 2 (Geophysical and Oceanographic STation for Abyssal Research) is an European project, funded by EU in the framework of Marine Science and Technology Programme (MAST-III), Aim of the project is to establish ne...
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GEOSTAR 2 (Geophysical and Oceanographic STation for Abyssal Research) is an European project, funded by EU in the framework of Marine Science and Technology Programme (MAST-III), Aim of the project is to establish new technologies for the deep-sea research in water depth down to 4000 m. the system includes: a) the deployment and recovery tool MODUS (MObile Docker for Underwater Science), designed to carry heavy loads up to 30kN;b) a multidisciplinary long-term Bottom Station, and c) several underwater communication systems with satellite shore links. the deployment and recovery shuttle tool MODUS is a more or less simplified ROV, which is capable to deploy, release, and locate again, dock and recover pay load stations of any kind that are equipped withthe MODUS-standard coupling interface. During the ongoing project version 1 of MODUS from the former project GEOSTAR 1 has been evaluated and completely redesigned. Experiences from field operation and simulations led to a more reliable system, which operated successfully in the Tyrrhenian Sea in late summer 2000. these aspects and some results are presented.
this paper describes adaptive-network modeling for color correction/compensation through multi-illuminant color device characterization of an electronic video camera. In particular, we emphasize a great potential for ...
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this paper describes adaptive-network modeling for color correction/compensation through multi-illuminant color device characterization of an electronic video camera. In particular, we emphasize a great potential for practical use of modular neural network-type CANFIS neuro-fuzzy models and their advantage over a single MLP approach as well as conventional lookup-table-based (TRC-matrix) methods by demonstrating their remarkable approximation and generalization capacity even when they are optimized with only four-illuminant data.
this paper describes firstly some of the challenges, requirements, and end-state visions of the Model-Based Integration of Embedded systems program (MoBIES) approach to developing avionics software systems. Next it pr...
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this paper describes firstly some of the challenges, requirements, and end-state visions of the Model-Based Integration of Embedded systems program (MoBIES) approach to developing avionics software systems. Next it provides an overview of the current Bold Stroke component-based product line development process. the paper subsequently addresses the three key technology areas of multiple view-modeling, model analysis and system configuration. the conclusion includes a brief description of upcoming experiments designed to exercise and demonstrate anticipated capabilities.
this paper describes the modeling of an industrial drying process into a three-input one-output first order Sugeno system. An objective system model is identified from input-output data of the system by applying the s...
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this paper describes the modeling of an industrial drying process into a three-input one-output first order Sugeno system. An objective system model is identified from input-output data of the system by applying the subtractive clustering algorithm. the input-output data represents process parameters measured during the drying of starch in a jet spouted dryer. Minimum error models are obtained through enumerative search of clustering parameters. A set of checking data is used to verify the model output. the optimal model, as well as its output, is presented. the step size used in the clustering parameter search is varied and its influence on the modeling performance is presented. Models obtained by setting the same cluster radius for all data dimensions and models obtained by setting a cluster radius for each data dimension are computed and their performance is compared.
When fully implemented, the global ATN will span organizational and international boundaries and facilitate implementation of air traffic management applications that improve communication reliability and maximize air...
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When fully implemented, the global ATN will span organizational and international boundaries and facilitate implementation of air traffic management applications that improve communication reliability and maximize airspace utilization. To counter potential threats to these critical communications, the ATN specifies requirements for an integrated security solution. As described in this paper, the ATN security solution is based on an underlying open-system framework that supports cryptographic optimization techniques targeted to meet the specific challenges of the aeronautical communications environment. Application of this security solution provides the security services necessary to protect ATN communications while minimizing security overhead exchanged via the bandwidth-limited air-ground data link.
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