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11.
The commonly used penalty methods(such as Varicomp or varying the thickness of the out-of-line barriers), for determining the detonation transfer probability for an explosive interface, may become less practical or convenient the more insensitive explosive is the acceptor. The method proposed here suggests replacing the design donor by an explosive(substitute donor) of a lower detonation pressure. Both the acceptor and the mechanical hardware of the test system should be identical to those of the design system. It is assumed that the detonation pressures of both the design donor and the substitute donor are normally distributed. The same assumption holds also for the threshold detonation pressure required for initiating the acceptor. Following these assumptions we present a method to determine a minimum number of tests required to demonstrate a given reliability at a given confidence level. The relative standard deviation for each detonation pressure is assumed to be equal for all donors. We show then that the required number of tests to demonstrate a given reliability(at a given confidence level), practically depends on the ratio of the detonation pressures of the design donor and its test substitute. A similar method can be applied to demonstrate low probability of detonation transfer(high safety), by replacing the design donor by one of a higher detonation pressure.  相似文献   
12.
In this study the authors examined a model in which procedural justice may serve as an external-situational resource that improves athletes' appraisals of stress and enhances their attitudes toward their team. Eighty-one Israeli male athletes were questioned on the degree of procedural justice employed on their team, how they appraised stress, and their attitudes toward their team. Results showed that higher procedural justice was associated with more positive appraisals of stress as a challenge and greater team loyalty and commitment and that the relationship of procedural justice to team commitment and loyalty was mediated by how stress is appraised. Findings integrate the cognitive-phenomenological model of stress/coping with the relational factors of the procedural justice approach and extend their validity to the field of sport. (PsycINFO Database Record (c) 2010 APA, all rights reserved)  相似文献   
13.
Web applications can be classified as hybrids between hypermedia and information systems. They have a relatively simple distributed architecture from the user viewpoint, but a complex dynamic architecture from the designer viewpoint. They need to respond to operation by an unlimited number of heterogeneously skilled users, address security and privacy concerns, access heterogeneous, up-to-date information sources, and exhibit dynamic behaviors that involve such processes as code transferring. Common system development methods can model some of these aspects, but none of them is sufficient to specify the large spectrum of Web application concepts and requirements. This paper introduces OPM/Web, an extension to the Object-Process Methodology (OPM) that satisfies the functional, structural and behavioral Web-based information system requirements. The main extensions of OPM/Web are adding properties of links to express requirements, such as those related to encryption; extending the zooming and unfolding facilities to increase modularity; cleanly separating declarations and instances of code to model code transferring; and adding global data integrity and control constraints to express dependence or temporal relations among (physically) separate modules. We present a case study that helps evaluate OPM/Web and compare it to an extension of the Unified Modeling Language (UML) for the Web application domain.  相似文献   
14.
A new non-volatile charge storage device is described. The floating gate avalanche injection MOS (FAMOS) structure is a p-channel silicon gate field effect transistor in which no electric contact is made to the silicon gate. It combines the floating gate concept with avalanche injection of electrons from the surface depletion region of a p-n junction to yield reproducible charging characteristics with long term storage retention.  相似文献   
15.
A protocol for performance evaluation of line detection algorithms   总被引:4,自引:0,他引:4  
Accurate and efficient vectorization of line drawings is essential for any higher level processing in document analysis and recognition systems. In spite of the prevalence of vectorization and line detection methods, no standard for their performance evaluation protocol exists. We propose a protocol for evaluating both straight and circular line extraction to help compare, select, improve, and even design line detection algorithms to be incorporated into line drawing recognition and understanding systems. The protocol involves both positive and negative sets of indices, at pixel and vector levels. Time efficiency is also included in the protocol. The protocol may be extended to handle lines of any shape as well as other classes of graphic objects.  相似文献   
16.
Three experiments examined how norms characteristic of a "culture of honor" manifest themselves in the cognitions, emotions, behaviors, and physiological reactions of southern White males. Participants were University of Michigan students who grew up in the North or South. In 3 experiments, they were insulted by a confederate who bumped into the participant and called him an "asshole." Compared with northerners (who were relatively unaffected by the insult) southerners were more likely to think their masculine reputation was threatened, more upset (as shown by a rise in cortisol levels), more physiologically primed for aggression (as shown by a rise in testosterone levels), more cognitively primed for aggression, and more likely to engage in aggressive and dominant behavior. Findings highlight the insult–aggression cycle in cultures of honor, in which insults diminish a man's reputation and he tries to restore his status by aggressive or violent behavior. (PsycINFO Database Record (c) 2010 APA, all rights reserved)  相似文献   
17.
In this paper, we propose a logic of argumentation for the specification and verification (LA4SV) of requirements on Dung??s abstract argumentation frameworks. We distinguish three kinds of decision problems for argumentation verification, called extension verification, framework verification, and specification verification respectively. For example, given a political requirement like ??if the argument to increase taxes is accepted, then the argument to increase services must be accepted too,?? we can either verify an extension of acceptable arguments, or all extensions of an argumentation framework, or all extensions of all argumentation frameworks satisfying a framework specification. We introduce the logic of argumentation verification to specify such requirements, and we represent the three verification problems of argumentation as model checking and theorem proving properties of the logic. Moreover, we recast the logic of argumentation verification in a modal framework, in order to express multiple extensions, and properties like transitivity and reflexivity of the attack relation. Finally, we introduce a logic of meta-argumentation where abstract argumentation is used to reason about abstract argumentation itself. We define the logic of meta-argumentation using the fibring methodology in such a way to represent attack relations not only among arguments but also among attacks. We show how to use this logic to verify the requirements of argumentation frameworks where higher-order attacks are allowed [A preliminary version of the logic of argumentation compliance was called the logic of abstract argumentation?(2005).]  相似文献   
18.
Soymilk was subjected to various heat treatments at 90, 120 and 140 °C for various lengths of time. The colour and flavour of the soymilk samples were evaluated by a sensory panel consisting of eight semi‐trained assessors on (1) a 9‐unit hedonic scale, with analysis based on the assumption that the units are equidistant, and (2) a 15‐point hedonic ‘Smiley’ pictorial scale, the results being analysed non‐parametrically. The proportion (%) of ratings higher than or equal to/higher than the overall median of the samples was used as a rigorous estimate of product quality. These values were used to determine the colour and flavour changes in heated soymilk and their temperature dependence. The Z‐values derived from the parametric and non‐parametric analyses were in close agreement, ranging from 31 to 33 °C and from 30 to 32 °C for colour and flavour respectively. © 2000 Society of Chemical Industry  相似文献   
19.
In this paper a new approach to the control of a nonlinear, time-varying process is proposed. It is based on a recursive version of the fuzzy identification method and predictive functional control. First, the recursive fuzzy identification method is derived, after which it is used in connection with fuzzy predictive functional control to construct an adaptive fuzzy predictive functional controller. The adaptive FPFC is then tested on a nonlinear, time-varying, semi-batch reactor process and compared with the standard FPFC, which uses non-adaptive fuzzy model. The simulation results are promising; they indicate that the control of time-varying, nonlinear processes with the FPFC can be improved with the use of an adaptive fuzzy model. An improvement in reference tracking and disturbance rejection can be observed, but the main advantage is the reduced number of switchings between hot and cold water. This is an important improvement in the case of real applications.  相似文献   
20.
The self is defined and judged differently by people from face and dignity cultures (in this case, Hong Kong and the United States, respectively). Across 3 experiments, people from a face culture absorbed the judgments of other people into their private self-definitions. Particularly important for people from a face culture are public representations—knowledge that is shared and known to be shared about someone. In contrast, people from a dignity culture try to preserve the sovereign self by not letting others define them. In the 3 experiments, dignity culture participants showed a studied indifference to the judgments of their peers, ignoring peers' assessments—whether those assessments were public or private, were positive or negative, or were made by qualified peers or unqualified peers. Ways that the self is “knotted” up with social judgments and cultural imperatives are discussed. (PsycINFO Database Record (c) 2010 APA, all rights reserved)  相似文献   
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