共查询到20条相似文献,搜索用时 15 毫秒
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Computer engineers are continuously seeking new solutions to increase available processing speed, achievable transmission rates, and efficiency in order to satisfy users’ expectations. While multi-core systems, computing clouds, and other parallel processing techniques dominate current technology trends, elementary particles governed by quantum mechanics have been borrowed from the physicists’ laboratory and applied to computer engineering in the efforts to solve sophisticated computing and communications problems. In this paper, we review the quantum mechanical background of quantum computing from an engineering point of view and describe the possibilities offered by quantum-assisted and quantum-based computing and communications. In addition to the currently available solutions, the corresponding challenges will also be surveyed. 相似文献
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Simon M. Lucas 《国际自动化与计算杂志》2008,5(1):45-57
The last few decades have seen a phenomenal increase in the quality, diversity and pervasiveness of computer games. The worldwide computer games market is estimated to be worth around USD 21bn annually, and is predicted to continue to grow rapidly. This paper reviews some of the recent developments in applying computational intelligence (CI) methods to games, points out some of the potential pitfalls, and suggests some fruitful directions for future research. 相似文献
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“Strategy”有着“战略/策略”两重含义,Interest则具有“兴趣/利益”两种意思。记者认为这两个词应该说是很好地表达了咨询公司的特质:它不仅可以提供宏观上的行动方向,也可以提供可供操作化的行动思路——Strategy;另外,这些以“调查、撰写和提供报告”为主要工作方式的知识型公司,又为那些能够也愿意把思想、阅历、积累、文笔结合在一起的人们找到了对市场经济的一个很好的切入点,对他们来说,这 相似文献
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壹 问题:当登录windows系统时,系统弹出对话框“此系统的本地策略不允许您采用交互式登录(Local policy does not permit you to logon interactively)。” 回答:首先尝试以本地管理员或域管理员登录故障计算机,如果可以,就更改相应的组策略,逐步进入以下各操作:管理工具、本地策略、计算机配置、Windows设置、安全设置、用户权利指派;在本地登录,添加希望登录的用户。 如不成功,就参考以下的步骤进行排错: 相似文献
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1.发件人:使用此选项可管理筛选的电子邮件地址。如果使用此列表中显示的一个电子邮件地址,向此Exchange server计算机发送邮件,则此邮件将不能送达收件人。 为防止特定的电子邮件地址向此服务器中的用户发送邮件,请单击“添加”按钮,然后键入具体的电子邮件地址。若要筛选来自特定域的所有邮件,可使用通配符。 相似文献
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《计算机安全》2003,(4)
Methods and apparatuses for providing cryptographic assurance based on ranges as to whether a particular data item is on a list. According to one computer-implemented method, the items on the list are sorted and ranges are derived from adjacent pairs of data items on the list. Next, cryptographically manipulated data is generated from the plurality of ranges. At least parts of the cryptographically manipulated data is transmitted onto a network for use in cryptographically demonstrating whether any given data item is on the list. According to another computer-implemented method, a request message is received requesting whether a given data item is on a list of data items, fn response, a range is selected that is derived from the pair of data items on the list that define the smallest range that includes the given data item. A response message is transmitted that cryptographically demonstrates whether the first data item is on the list using cryptographically manipulated data derived from the range. Acco 相似文献
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The sphere is a natural and seamless parametric domain for closed genus-0 surfaces. We introduce an efficient hierarchical optimization approach for the computation of spherical parametrization for closed genus-0 surfaces by minimizing a nonlinear energy balancing angle and area distortions. The mapping results are bijective and lowly distorted. Our algorithm converges efficiently and is suitable to manipulate large-scale geometric models. We demonstrate and analyze the effectiveness of our mapping in spherical harmonics decomposition. 相似文献
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Jayantha P.Liyanage 《国际自动化与计算杂志》2010,7(2):137-145
Plant maintenance has been a discipline that has gradually evolved with the industrial revolution. For quite some time, it has been a ``necessary evil' in production, manufacturing, and process settings. The changing business needs and industrial conditions have had various impacts on the maintenance process, particularly over the last few years. While some industries have inherent difficulties seeing what maintenance is all about, others have begun to add more flavor to the organizational maintenance practices. This article brings an overview of developments within the offshore oil and gas production sector. 相似文献
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Pedro Furtado 《Distributed and Parallel Databases》2009,25(1-2):71-96
Consider data warehouses as large data repositories queried for analysis and data mining in a variety of application contexts. A query over such data may take a large amount of time to be processed in a regular PC. Consider partitioning the data into a set of PCs (nodes), with either a parallel database server or any database server at each node and an engine-independent middleware. Nodes and network may even not be fully dedicated to the data warehouse. In such a scenario, care must be taken for handling processing heterogeneity and availability, so we study and propose efficient solutions for this. We concentrate on three main contributions: a performance-wise index, measuring relative performance; a replication-degree; a flexible chunk-wise organization with on-demand processing. These contributions extend the previous work on de-clustering and replication and are generic in the sense that they can be applied in very different contexts and with different data partitioning approaches. We evaluate their merits with a prototype implementation of the system. 相似文献
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《Ergonomics》2012,55(9):821-827
Abstract The relation between circadian variables (oral temperature and subjective alertness) and sleep-awake schedules was explored as a function of a subjective preference index (Home and Ostberg 1976) which classifies subjects as ’morning’ or ‘evening’ type. Measurements of oral temperature and self-assessed alertness were obtained every 3 hours from rising time to bedtime over a 2 week period in 49 medical students. Sleep logs were kept by the students during the same period. Sleep schedules and alertness peak time, as well as the relative temporal location of alertness peak time and temperature peak time, differed in relation to the Home and Ostberg index. These results suggest that in normal conditions the coupling between temperature circadian rhythm and sleep-awake cycle differs in morning types and evening types. 相似文献
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Curvature-based surface energies are frequently used in mathematics, physics, thin plate and shell engineering, and membrane chemistry and biology studies. Invariance under rotations and shifts makes curvature-based energies very attractive for modeling various phenomena. In computer-aided geometric design, the Willmore surfaces and the so-called minimum variation surfaces (MVS) are widely used for shape modeling purposes. The Willmore surfaces are invariant w.r.t conformal transformations (Mbius or conformal invariance), and studied thoroughly in differential geometry and related disciplines. In contrast, the minimum variation surfaces are not conformal invariant. In this paper, we suggest a simple modification of the minimum variation energy and demonstrate that the resulting modified MVS enjoy Mbius invariance (so we call them conformal-invariant MVS or, shortly, CI-MVS). We also study connections of CI-MVS with the cyclides of Dupin. In addition, we consider several other conformal-invariant curve and surface energies involving curvatures and curvature derivatives. In particular, we show how filtering with a conformal-invariant curve energy can be used for detecting salient subsets of the principal curvature extremum curves used by Hosaka and co-workers for shape quality inspection purposes. 相似文献
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Multimedia Tools and Applications - This paper explores the necessity of having hearing impaired (HI) and dysarthric speakers be part of the person authentication system and it is considered to be... 相似文献
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A method is developed for application of the Tsypkin criterion and the Jury and Lee stability criteria for certain classes of non-linear sampled data systems The method, which uses root-locus techniques, is based on the root-locus interpretation of the Popov criterion for continuous data non-linear systems. This method was developed by Ramapriyan et al. (1966). 相似文献
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HEINRICH HÜHNERFUSS WERNER ALPERS KARL RICHTER 《International journal of remote sensing》2013,34(8):1001-1013
Abstract The applicability of an X-band (9·4 GHz) real aperture radar (RAR) and an infrared (IR) radiometer to discriminate between crude-oil spills and monomolecular sea slicks is investigated over the same sea area. The results from quasi-simultaneous overflights over a crude-oil spill and three different sea slicks (oleyl alcohol, di-(ethylenglycol)-mono-isostearyletherand methyl oleate)show that the advantage of an imaging radar is its uniequi vocal potential for surveying large sea surfaces and that the advantage of an IR sensor is its ability to determinate quickly the thick centres of crude-oil spills. However, neither the RAR nor the IR radiometer can discriminate between crude-oil spills and sea slicks. Therefore, an airborne coastal patrol with the objective of monitoring oil pollution must comprise a package of additional sensors, e.g. a microwave radiometer and/or a lidar system. 相似文献