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1.
最近.由于工件的需要.安装了不少软件,进行各种测试.结果爱机开始罢工了,开始出现异常现象:死机,蓝屏.找不到某个文件。没办法,只好启用“一键恢复”.N分钟后.系统恢复完毕。重启.进入系统,拨号上网(ADSL),浏览网页.一切顺利。  相似文献   

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In this paper the definition of order-sorted algebra is generalized by introducing transformation functions between subtypes and supertypes.According to our definition,a type needn‘t be a subset of its supertype and a record model may form an order-sorted algebra.A new definition of equation is given.It has also been proved that equational theories and describing single inheritance have the initial model.  相似文献   

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A New Definition of the Hough Transform   总被引:2,自引:0,他引:2       下载免费PDF全文
This paper‘s main contributions are three-fold.Firstly,it is shown that the two existing template matching-like definitions of the Hough transform in the literature are inadequate.Secondly,an inherent probabilistic aspect of the Hough transform embedded in the transformation process from image space to parameter space is clarified.Thirdly,a new definition of the Hough transform is proposed which takes into account both the intersection scheme between the mapping curve(or mapping surface) and accumulator cells and the inherent probabilistic characteristics.  相似文献   

4.
Fire alarm system is important in high-rise building. In this paper, a fire alarm system of high-rise building is designed using fuzzy system theory and neural network. The fuzzy system has superiority in inference and the neural network has superiority in learning. The design parameters of the fuzzy system can b~ adjusted automatically by combining the fuzzy system with the neural network. The contradiction between alarm sensitivity and false alarm rate is solved by intelligently monitoring of the temperature and aerosol, which are detected by temperature sensor and aerosol sensor in the system.  相似文献   

5.
This paper describes a coordination model for collaborative work. The model called Coordinated Work Environment, utilizes an assembly of several organization units with specific goals and structure, populated by actors, work practices, and artifacts. Coordination work is defined by interdependencies existing in work practices, which can be prerequisite, simultaneous, or by means of sharing of resources. Coordination between communities of practice is established through interactions between them by using artifacts from object worlds. Interactions are of different kinds: interactions for action, possibilities, clarification, and orientation. The paper is based both on several ethnographic studies carried out in radiology departments in Austria, Denmark, and Sweden, and on analysis and assessment of computer systems (picture archiving and communication systems, radiology, and hospital information systems) and artifacts used to support communication, coordination, and collaboration in radiographic health care. It describes the elements of a coordinated work environment in detail by illustrating some practical examples from radiology work.  相似文献   

6.
Development of “STORK”, a watermelon-harvesting robot   总被引:2,自引:0,他引:2  
Recently, the production of heavy fruit and vegetables has been decreasing in Japan because strenuous labor is require to harvest them. A robot would allow them to be harvested more easily. We have developed the robot “STORK” to harvest watermelons. STORK has a low mass and a long working range. The position accuracy and repeatability of the manipulator, the required vacuum, and the allowance for position error of the vacuum pad were tested.  相似文献   

7.
Abstract

Anthony McCall's solid light film Line Describing a Cone (1973) is about the emergence of dimensionality in space. This paper uses Line Describing a Cone to discuss emergence as a material algorithmic process occurring across the media of informatic systems and installation art. Evolutionary models of emergence trace patterns, whether behavioural, spatial or genetic. Line Describing a Cone suggests the emergence of a new kind of mobilized viewer within gallery spaces who does not necessarily ‘evolve’ but who (through interruption and noise) becomes an interactive emergent part of the material processes of the work. Noise travels and generates the excess dimensionality within which an emergent material process can occur. It is contested here that emergence can only occur within noisy environments. Emergence then, introduces a process within which viewers interact with and experience art installations.  相似文献   

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《Automatica》1986,22(2):255-256
The parametric model used by Zhu and Wan for expressing survival rate as a function of age can be replaced by a simpler model without discernable loss of accuracy. The parameters of this simpler model are subject to easy interpretation.  相似文献   

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The problem of constructing an observer for a discrete linear system so as to minimize a quadratic function of the state estimation error is considered. The choice of a particular canonical representation for the system is shown to lead to a simple design procedure. The resulting observer is shown also to possess the minimum-time state-estimation property.  相似文献   

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In order to encourage more active learning in the library classroom, the college librarians at the Tidewater Community College/City of Virginia Beach Joint-Use Library turned one of their library instruction classrooms into a dynamic and flexible space using movable seating and iPads. This article explores the reasons for making such a change, the benefits of doing so, how the new classroom has affected librarians' teaching methods, and gives specific information about apps used for class activities.  相似文献   

14.
A relevant aspect when evaluating the city smartness is related to the innovative approach to urban traffic management. We present a system called city kernel, designed to handle several subsystems, each addressing a specific sensor network and we describe an infrastructure for wide traffic control via a vision sensor network. This infrastructure consists of a network of smart cameras operating over an outdoor public lighting thanks to power line communication technology and equipped with a vehicle counting and classification algorithm. We discuss the deployment of this network on the city kernel and some related services exposed to urban actors.  相似文献   

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We discuss the “Charge of the Byte Brigade”, manifest in the over-emphasis on technological solutions to system design and a set of criticisms levied against humans. Function allocation is central to these issues. We identify a number of different perspectives on the meaning and status of function allocation and outline our own position. This is critical of the field generally, and we argue for a number of actions, not least for a change in name in an attempt to capture a more integrative perspective on socio-technical allocations. Much of what we recommend is concerned with re-branding and re-positioning the content and underlying mindsets of this field of endeavour, and with extending the roles of people working in it. In particular, we argue that socio-technical allocations are central to system design, that we need a more integrated approach to the design and use of systems and that this process should be owned by system managers and users. We argue the need for more research and development, for the development of improved tools to support design, for raising public awareness and for developing new partnerships with relevant stakeholders. In the final part of the paper, we describe our own approach to the development and use of a set of interrelated tools to support socio-technical allocations. Finally, we comment on the existing marginalization of these issues.  相似文献   

18.
This paper describes a partial evaluation system specifically designed to be used as an automatic compilation tool for metaprograms in a KBMS (EPSILON) based on Prolog. EPSILON main underlying concepts are the extension of Prolog with theories (“multiple worlds”) and the use of metaprogramming as the basic technique to define new inference engines and tools. Our partial evaluator is oriented towards theories and metainterpreter specialization. Being designed to be used as an automatic compiler, it does not require declarations from the user to control the unfolding process. It handles full Prolog and provides also an elegant solution to the problem of the partial evaluation of incomplete and self-modifying programs, by exploiting the multiple worlds feature added to Prolog. EPSILON partial evaluation system turned out to be a very useful and powerful tool to combine the low cost and the flexibility of metaprogramming with the performance requirements of a practical knowledge based system.  相似文献   

19.
“Social folksonomies” can be regarded as new-generation folksonomies obtained by empowering classical folksonomies with some features typical of social networks. Currently, they represent the natural evolution of traditional folksonomies since the presence of social network features in them could lead to an enormous increase of their performance. In order to efficiently and effectively handle this kind of folksonomies, new approaches appear compulsory because the simple extension of the ones operating on classical folksonomies appears incapable of fully capturing the new potentials of these entities. In this paper, we first illustrate a new approach that fully exploits the “social” features of these folksonomies to provide a user with recommendations of similar users and resources. Then, we present some experiments devoted to measure its performance. Finally, we compare it with various related ones already proposed in the literature.  相似文献   

20.
The current paper deals with the definition of sizes for the design of school furniture for schools in Bogotá, Colombia, based on an analysis of available anthropometric data on Latin American children. State-of-the-art anthropometric, national and international standards were considered, in order to define the anthropometric variables that were to be used for defining the furniture. Matrices relating age and specific anthropometric dimensions were constructed, as a visualization method for establishing the dimensional differences between children of the same age and the ranges that should be covered by the items of furniture. Dimensional data were grouped by establishing the minimum sizes and general dimensions of furniture needed to cover the 5-95th percentile of school children between the ages of 5 and 18 years. The distribution of the furniture in the different school grades was also indicated. Apart from the need for an adequate match between child anthropometry and school furniture dimensions, this study shows the importance of a proper distribution of furniture sizes in the different school grades, as a complementary and decisive aspect to be considered in order to meet the heterogenic, anthropometrical requirements of children of the same age and school grade.  相似文献   

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