作者: Initial 時(shí)間: 2025-3-21 20:56
0302-9743 30, 1989. The papers selected from more than one hundred submissions, originating from 23 countries in 4 continents, can be roughly divided into the following sections: theoretical fundamentals of relational databases, logical foundations and databases, data modelling, database design, deductive dat作者: 滔滔不絕地講 時(shí)間: 2025-3-22 02:30
Approaches to updates over weak instances,stinguish between semantic and heuristic, or computational, approaches. The two semantic approaches turn out to be very similar, even if they have different origins, and are more general than the heuristic approaches.作者: antidepressant 時(shí)間: 2025-3-22 07:11 作者: 遺傳 時(shí)間: 2025-3-22 09:12 作者: ATRIA 時(shí)間: 2025-3-22 13:20 作者: Axillary 時(shí)間: 2025-3-22 20:19 作者: 是剝皮 時(shí)間: 2025-3-22 23:06 作者: interior 時(shí)間: 2025-3-23 03:18 作者: LEER 時(shí)間: 2025-3-23 08:41 作者: CLAY 時(shí)間: 2025-3-23 12:00
Multiple task selection protocol in a distributed problem solving network,lving network. These functions are used to specify the Multiple Task Selection Protocol which dynamically selects the most competent group of nodes for solving a problem and improves the problem solving capability of the network by making use of previous experience.作者: JECT 時(shí)間: 2025-3-23 16:18 作者: Cumbersome 時(shí)間: 2025-3-23 20:00
Selective refutation of integrity constraints in deductive databases, framework rather than providing convincing elements with respect to the advantages of the method. In order to get such an evidence examples that give rise to a more complex search spaces are needed..Much work has to be done to extend the approach to normal programs even if we foresee less advantages.作者: Pastry 時(shí)間: 2025-3-23 23:30 作者: 外形 時(shí)間: 2025-3-24 04:55 作者: APNEA 時(shí)間: 2025-3-24 08:10
An extended view on data base conceptual design,f Discourse?" by giving specific methods and algorithms. Some new operational concepts are introduced and studied: identifiers, identifier equivalence, special subuniverses, the relationship "A is genus proximus of B".作者: 無(wú)法治愈 時(shí)間: 2025-3-24 12:04 作者: lactic 時(shí)間: 2025-3-24 18:53
Restructuring and dependencies in databases,pendencies that generalize the functional ones are introduced. For these dependencies a sound and complete inference system D is constructed. Moreover, from the system D and the mapping ? a sound and complete inference system for the triple (?, ?, .) is obtained.作者: 不合 時(shí)間: 2025-3-24 22:30 作者: 百科全書(shū) 時(shí)間: 2025-3-25 02:46
A strategy for executing complex queries, is used; it allows us to maintain a join index, i.e. an index which permits to compute a join without operating on tuples coming from the two operand relations in it. The join index we propose can be used also when computing selections; we will show how it permits to perform operations on sets of pointers efficiently.作者: hieroglyphic 時(shí)間: 2025-3-25 06:22
Selective refutation of integrity constraints in deductive databases,se. We have applied such method to integrity constraint checking but it seems useful in other application areas as well..Despite to its simplicity in the case of definite goals and programs, when introducing negation problems arise. We restricted ourselves to definite programs and normal goals becau作者: 周興旺 時(shí)間: 2025-3-25 11:34
Approaches to updates over weak instances,lem of updating databases through interfaces based on the weak instance model..Insertions and deletions of tuples are considered..It is possible to distinguish between semantic and heuristic, or computational, approaches. The two semantic approaches turn out to be very similar, even if they have dif作者: 藕床生厭倦 時(shí)間: 2025-3-25 13:32
Index selection in relational databases,es, updates, insertions and deletions, and we define a function that calculates the transactions total cost when an index set is used. Our aim was to minimize the function cost in order to identify the optimal set. The algorithms proposed in previous studies require an exponential time in the number作者: 躺下殘殺 時(shí)間: 2025-3-25 16:45
Towards a schema design methodology for deductive databases,n the real world can simply and efficiently be obtained just by looking at its representation, i.e., just by querying the database. In this paper, we try to direct the reader‘s attention to the schema design problem for deductive (or logic oriented) databases. In order to provide a formal framework 作者: 傾聽(tīng) 時(shí)間: 2025-3-25 23:27
Shared abstract data types: An algebraic methodology for their specification,hich it is possible to avoid the unnecessary constraints on concurrency usually imposed by traditional transaction management approaches. The used method is based on the definition of the data as abstract data types in the well known algebraic method. The semantics of the data is given in two steps:作者: GLOSS 時(shí)間: 2025-3-26 01:20 作者: monologue 時(shí)間: 2025-3-26 07:34
Interaction of authorities and acquaintances in the DORIS privacy model of data, kinds of rights: Authorities on roles (allowing operations) which are statically declared for groups (classes), and acquaintances (access capabilities) that are dynamically granted to persons (instances). The interaction of authorities and acquaintances is studied and some pitfalls are identified. 作者: 無(wú)法取消 時(shí)間: 2025-3-26 08:43
Logical rewritings for improving the evaluation of quantified queries,iple common to the methods that have been proposed for answering quantified queries. Relying on this concept, we define the class of . (cdi) formulas. We show that cdi queries can be constructively evaluated by searching only the relations they refer to. Therefore, cdi queries admit domain independe作者: 暗語(yǔ) 時(shí)間: 2025-3-26 15:18 作者: 傷心 時(shí)間: 2025-3-26 19:33
An extended view on data base conceptual design,s into the research area a new side of the conceptual design process namely, structural knowledge acquirement; 2) Data Base conceptual design is seen as a process of synthesizing, at the level of the Universe, the structural knowledge acquired separetly from subuniverses. For this extended conceptua作者: 舞蹈編排 時(shí)間: 2025-3-26 23:53
Modeling planning problems,ed in the fields of Artificial Intelligence, Decision Support Systems and Operation Research. The meaning of these terms, however, is rather intuitive. This article presents a general concept of planning that covers a wide range of planning problems. The definitions that capture the necessary notion作者: Ingrained 時(shí)間: 2025-3-27 04:09 作者: 接觸 時(shí)間: 2025-3-27 07:32
A strategy for executing complex queries,ii) the representation of temporary relations, obtained during the execution of a query, as sets of pointers to tuples; (iii) the execution of the relational operators involved in the query by means of operations, namely intersections, unions and Cartesian products, on these sets of pointers. In thi作者: 學(xué)術(shù)討論會(huì) 時(shí)間: 2025-3-27 12:01
Multiple task selection protocol in a distributed problem solving network,into subproblems which can already be solved by the nodes. The aim of a problem solving network is to assign the subproblems to nodes which attempt to solve those cooperatively. The notion of Communication Functions is introduced to specify the behavior of cooperative nodes in distributed problem-so作者: 合同 時(shí)間: 2025-3-27 17:42
Equivalent schemes in semantic, nested relational, and relational database models,ding schemes are equivalent w.r.t. the notion of information capacity [Hul 86], i.e., the mappings between the corresponding sets of instances are bijections. The examinations are done in the framework of the database model EXTREM (EXTended RElational Model) which integrates four types of database m作者: oracle 時(shí)間: 2025-3-27 18:24 作者: Frisky 時(shí)間: 2025-3-28 01:45
RTL a Relation and Table Language for statistical databases,al databases. We first describe our data model for statistical applications, based upon a twofold structure : relation and Complex Statistical Table (CST). Then, we present RTL, that encompasses relational algebra with aggregate operator, transformation operators, in order to achieve conversion betw作者: 帳單 時(shí)間: 2025-3-28 02:16 作者: 文件夾 時(shí)間: 2025-3-28 07:59
E. Barcucci,A. Chiuderi,R. Pinzani,M. C. VerriLebensmitteln spielen überall dort eine wesentliche Rolle, wo moderne lebensmitteltechnologische Verfahren für die Gewinnung der Rohstoffe oder die Herstellung eines Lebensmittels angewandt werden. Die Bestimmung physikalischer Gr??en von Lebensmitteln und Bedarfsgegenst?nden sind aus der Planung, S作者: nephritis 時(shí)間: 2025-3-28 12:44 作者: Foment 時(shí)間: 2025-3-28 17:28
A. Bondavalli,N. De Francesco,D. Latella,G. VagliniLebensmitteln spielen überall dort eine wesentliche Rolle, wo moderne lebensmitteltechnologische Verfahren für die Gewinnung der Rohstoffe oder die Herstellung eines Lebensmittels angewandt werden. Die Bestimmung physikalischer Gr??en von Lebensmitteln und Bedarfsgegenst?nden sind aus der Planung, S作者: 鞠躬 時(shí)間: 2025-3-28 19:58
Stefan Brass,Udo W. Lipecktelpraxis.Anschaulich und anwendungsbezogen für Studenten un.Die Lebensmittelphysik befasst sich mit den physikalischen Eigenschaften der Lebensmittel und deren Erfassung...Die physikalischen Eigenschaften von Lebensmitteln spielen überall dort eine wesentliche Rolle, wo moderne lebensmitteltechnolo作者: indifferent 時(shí)間: 2025-3-28 22:56 作者: Psa617 時(shí)間: 2025-3-29 04:58
Fran?ois Brytelpraxis.Anschaulich und anwendungsbezogen für Studenten un.Die Lebensmittelphysik befasst sich mit den physikalischen Eigenschaften der Lebensmittel und deren Erfassung...Die physikalischen Eigenschaften von Lebensmitteln spielen überall dort eine wesentliche Rolle, wo moderne lebensmitteltechnolo作者: omnibus 時(shí)間: 2025-3-29 09:53 作者: 蔓藤圖飾 時(shí)間: 2025-3-29 12:40
János Demetrovics,Leonid O. Libkin,Ilya B. MuchnikLebensmitteln spielen überall dort eine wesentliche Rolle, wo moderne lebensmitteltechnologische Verfahren für die Gewinnung der Rohstoffe oder die Herstellung eines Lebensmittels angewandt werden. Die Bestimmung physikalischer Gr??en von Lebensmitteln und Bedarfsgegenst?nden sind aus der Planung, S作者: 不可比擬 時(shí)間: 2025-3-29 16:45 作者: 命令變成大炮 時(shí)間: 2025-3-29 22:36
A. E. EibenLebensmitteln spielen überall dort eine wesentliche Rolle, wo moderne lebensmitteltechnologische Verfahren für die Gewinnung der Rohstoffe oder die Herstellung eines Lebensmittels angewandt werden. Die Bestimmung physikalischer Gr??en von Lebensmitteln und Bedarfsgegenst?nden sind aus der Planung, S作者: 勾引 時(shí)間: 2025-3-30 01:44 作者: 易碎 時(shí)間: 2025-3-30 04:40
Elisabetta Grazzini,Fabio Pippolinitelpraxis.Anschaulich und anwendungsbezogen für Studenten un.Die Lebensmittelphysik befasst sich mit den physikalischen Eigenschaften der Lebensmittel und deren Erfassung...Die physikalischen Eigenschaften von Lebensmitteln spielen überall dort eine wesentliche Rolle, wo moderne lebensmitteltechnolo作者: 思想靈活 時(shí)間: 2025-3-30 12:00 作者: 袖章 時(shí)間: 2025-3-30 12:28
Andreas HeuerLebensmitteln spielen überall dort eine wesentliche Rolle, wo moderne lebensmitteltechnologische Verfahren für die Gewinnung der Rohstoffe oder die Herstellung eines Lebensmittels angewandt werden. Die Bestimmung physikalischer Gr??en von Lebensmitteln und Bedarfsgegenst?nden sind aus der Planung, S作者: 魯莽 時(shí)間: 2025-3-30 18:53 作者: Introvert 時(shí)間: 2025-3-30 21:42
Edward A. Komissartschikereinen Theorie- und Praxiswissen – für Studierende und Prak.Die vollst?ndig überarbeitete Neuauflage des Lehrbuchklassikers jetzt erg?nzt durch ein zus?tzliches Kapitel und mit neuem Layout.?.Dieses Standardwerk umfasst s?mtliche Themengebiete der Lebensmittelphysik und behandelt u. a. die thermisc作者: micronized 時(shí)間: 2025-3-31 02:49 作者: Vsd168 時(shí)間: 2025-3-31 05:28
Mathematical foundations of semantic networks theory,作者: 刻苦讀書(shū) 時(shí)間: 2025-3-31 11:59
Stefan Brass,Udo W. Lipeck indem sie moderne physikalische Verfahren in der Produktion einsetzen. Auch hierfür ist ein grundlegendes Verst?ndnis der physikalischen Eigenschaften von Lebensmitteln und den M?glichkeiten und Grenzen ihrer 978-3-642-32390-4978-3-540-34990-7作者: Gorilla 時(shí)間: 2025-3-31 15:34 作者: 縮影 時(shí)間: 2025-3-31 19:43
