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Scientific collaboration increasingly involves data sharing between separate groups. We consider a scenario where data products of scientific workflows are published and then used by other researchers as inputs to their workflows. For proper interpretation, shared data must be complemented by descriptive metadata. We focus on provenance traces, a prime example of such metadata which describes the...
Porting applications to Distributed Computing Infrastructures (DCIs) is eased by the use of workflow abstractions. Yet, estimating the impact of the execution DCI on application performance is difficult due to the heterogeneity of the resources available, middleware and operation models. This paper describes a workflow-based experimental method to acquire objective performance comparison criterions...
The objective of this paper is to develop a localization system for cooperative multiple mobile robots, in which each robot is assumed to observe a set of known landmarks and equipped with an omnidirectional camera. If only a limited number of landmarks are available, it suffers from law accuracy. In this paper, it is assumed that a robot can detect other robots by using the omnidirectional camera...
The scale invariant feature transform (SIFT) is a very efficient algorithm to extract and describe distinctive invariant features from images, and usually applied for many image applications such as object recognition, robotic mapping, and navigation. In the SIFT computation, the complexity of the feature description is quite high. Hence, it is desirable to have an efficient VLSI architecture to compute...
Environmental data arriving constantly from satellites and weather stations are used to compute weather coefficients that are essential for agriculture and viticulture. For example, the reference evapotranspiration (ET0) coefficient, overlaid on regional maps, is provided each day by the California Department of Water Resources to local farmers and turf managers to plan daily water use. Scaling out...
Tele-operated laboratory experiments are monitored or operated by visualization systems. In case of using a web browser the rapidly evolving web technology generates an increasing variety of client platform applications. Therefore, solutions are often obsolete after a short life time. New browser versions do not support earlier versions of web technology or browsers of different developers differ...
Large-scale data-intensive streaming applications in various science fields feature complex DAG-structured workflows comprised of distributed computing modules with intricate inter-module dependencies. Supporting such workflows in high-performance network environments and optimizing their throughput are crucial to collaborative scientific exploration and discovery. We formulate workflow mapping as...
The contribution sketches a possibility how to represent and manage uncertainties in decentralized systems. For this purpose the formal concept of fuzzyness in combination with the formalized language-theoretic concept of grammar systems is used.
Time synchronization is one of the key points in distributed real-time computer system. At first, a time synchronization method under 1PPS signal is put forth. Secondly, two kinds of relevant synthetic disturbance are analyzed, and time synchronization logic is studied to cope with the disturbance. Arena software is chosen to model and simulate the time synchronization procedure. At last, the whole...
Based on the researches of E-education GRID and Cooperative Intelligent Grid, a new cooperative intelligent grid based E-education platform was designed.
The specific transmission and diffusion of emergency in supply chain is determined by the characteristics of complexity, multitudiousness and diversification of stakeholders of supply chain. This paper analyzed the diffusion traits, patterns and influencing factors of emergency in supply chain. The incubation period, fast outbreak period and slow diffusion mechanism of emergency in supply chain are...
Gaussian mixture model is a commonly used background modeling method in moving object detection. Gaussian mixture model has a strong adaptivity to various complicated backgrounds, but converges slowly and lacks shadow detection capability. In this paper, we propose an improved Gaussian mixture model which models background and foreground at the same time, accelerates convergence when moving objects...
This paper investigates the intra-fleet and inter-fleet model for the solution of crew scheduling problem during airline irregular operations. The intra-fleet model is widely adopted in the airline industry where flight is grouped together and works typically within a fleet. The inter-fleet model on the other hand, splits of flight attendant groups and reassign of them across different fleet. Though...
Cellular Automata (CA) model is extensively applied to pedestrian evacuation simulation in emergency, but little research is about pedestrian behavior of orderly activities in normal situation. Based on queue theory, CA, finite state machine model and visibility graph, queuing behavior and path search algorithm are modeled. Considering the direction of queue activities, a pedestrian locomotion behavior...
In allusion to China's urgent need for predictive control of the air traffic flow, this paper mainly introduce the research status and the development process of the air traffic flow model through studying the research history and various existing models. It also introduce and analysis five kinds of the mainstream models. Through analysis and comparison, it can be found that each model has its own...
Pulsed anti-riots water cannon is one kind of non-lethal weapon which have been used extensively throughout the world. In order to reduce the use of irritants, water and improve its atomization effect, a new type of anti-riots water cannon suppose to be designed, which use the high-pressure gas to drive the mixture of water and irritants to dispel large group of people in long distance. The mathematic...
Customer assessment is very important for product innovation. In this study, the genetic algorithms and fuzzy comprehensive evaluation were used together to analyze the product assessment data. The evaluation made by undergraduates on Master Kong beef instant noodle was used as an example. The research shows that genetic algorithms-based fuzzy comprehensive evaluation is useful in the customer assessment...
Former research of transport reliability focuses on road network, few of which refer to the intersection traffic reliability in microcosmic level. The paper proposes the conception of traffic reliability based on which the supply-demand reciprocity is analyzed, and brings forward the methodology that the disabled condition should be differentiated according to distinct system functions. Aiming at...
Modeling the execution of a processor and its instructions is a challenging problem, in particular in the presence of long pipelines, parallelism, and out-of-order execution. A naive approach based on finite state automata inevitably leads to an explosion in the number of states and is thus only applicable to simple minimalistic processors. During their execution, instructions may only proceed forward...
The traditional method to manufacture the auricular prosthesis is based on producing a cast of the patient's contralateral ear by direct impression, and sculpting a mirror pattern corresponding to the missing ear. The accuracy and efficiency of prosthesis produced by conventional method absolutely depend on the skill, experience and aesthetic level. An approach that combines laser scanning, reverse...
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