Collaborative access control is receiving growing attention in both military and commercial areas due to an urgent need to protect confidential resources and sensitive *** access control means that multiple subjects s...
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Collaborative access control is receiving growing attention in both military and commercial areas due to an urgent need to protect confidential resources and sensitive *** access control means that multiple subjects should participate to make access control decisions to prevent fraud or the abuse of *** approaches to access control cannot satisfy the requirements of collaborative access *** address this concern,we propose an authorization model for collaborative access *** central notions of the model are collaborative permission,collaboration constraint,and collaborative authorization policy,which make it possible to define the collaboration among multiple subjects involved in gaining a *** implementation architecture of the model is also ***,we present effective conflict detection and resolution methods for maintaining the consistency of collaborative authorization policies.
The process of converting a given design into the form of a rawstock minus a series of machining features is known as machining-features extraction. One step towards automatic machining-features extraction is the extr...
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The process of converting a given design into the form of a rawstock minus a series of machining features is known as machining-features extraction. One step towards automatic machining-features extraction is the extraction of machining regions. The paper is concerned with the extraction of machining regions from the constructive-solid-geometry representation of a given object. The proposed method for the extraction of machining regions is based on manipulating the original CSG tree, representing the object, evaluating the various machining regions by using octrees, and pruning the CSG tree accordingly. If necessary, an additional stage of compacting follows. As a result, each machining region is represented by a compact CSG tree offering the following advantages. The CSG tree to be analysed is reduced in size, and thus the problem of machining-features extraction is simplified. The information is compact and concise. Moreover, no information is lost (CSG representation is kept rather than boundary representation), and the designer's intensions are conveyed to the process planner more clearly. In the special case in which the machining regions are identical to machining features, the method does offer the automatic extraction of machining features. In addition, the nesting level of the various machining regions is determined when needed.
For acquiring the body measurements precisely and conveniently, this paper presents a forecast method with character parameters. The character parameters are chosen based on factor analysis. The nonlinear model based ...
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Recent advances in generative modeling have enabled the generation of high-quality synthetic data that is applicable in a variety of domains, including face recognition. Here, state-of-the-art generative models typica...
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We present a new cellular automata model for one-lane traffic flow. In this model, we consider the driver prejudgment according to the state of the leading car. We also consider that the vehicle deceleration capabilit...
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We present a new cellular automata model for one-lane traffic flow. In this model, we consider the driver prejudgment according to the state of the leading car. We also consider that the vehicle deceleration capability is finite and the braking distance of the high-speed running cars cannot be ignored, which is not considered in most models. Furthermore, comfortable driving is considered, too. Using computer simulations we obtain some basic qualitative results and the fundamental diagram of the proposed model. In comparison with the known models, we find that the fundamental diagram of the proposed model is more realistic than that of the known models.
Automated processing, semantic-enrichment and visual analytics methods for point clouds are often use-case specific for a given domain (e.g. for Facility Management (FM) applications). Currently, this means that appli...
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Capturing urban areas and transport infrastructure for automated analysis processes becomes ever more important. Laserscanning and photogrammetry are used for scanning the environment in highly detailed resolution. Th...
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We present a new combined cellular automaton (CA) model for one-lane traffic flow. In this model, we consider the driver prejudgment according to the state (velocity and brake light) of the leading vehicle. We also co...
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