標(biāo)題: Titlebook: Semantics in Databases; Bernhard Thalheim,Leonid Libkin Conference proceedings 1998 Springer-Verlag Berlin Heidelberg 1998 constraint data [打印本頁] 作者: 公款 時(shí)間: 2025-3-21 16:34
書目名稱Semantics in Databases影響因子(影響力)
書目名稱Semantics in Databases影響因子(影響力)學(xué)科排名
書目名稱Semantics in Databases網(wǎng)絡(luò)公開度
書目名稱Semantics in Databases網(wǎng)絡(luò)公開度學(xué)科排名
書目名稱Semantics in Databases被引頻次
書目名稱Semantics in Databases被引頻次學(xué)科排名
書目名稱Semantics in Databases年度引用
書目名稱Semantics in Databases年度引用學(xué)科排名
書目名稱Semantics in Databases讀者反饋
書目名稱Semantics in Databases讀者反饋學(xué)科排名
作者: chapel 時(shí)間: 2025-3-21 23:52
The evolving algebra semantics of class and role hierarchies,vice feature of object-oriented data models proposed recently by different authors: role hierarchies. As opposed to traditional class hierarchies, role hierarchies allow objects to dynamically acquire multiple independent types.作者: 銼屑 時(shí)間: 2025-3-22 02:22 作者: Conjuction 時(shí)間: 2025-3-22 05:40 作者: PURG 時(shí)間: 2025-3-22 10:00 作者: 嚴(yán)厲譴責(zé) 時(shí)間: 2025-3-22 16:01 作者: 變形詞 時(shí)間: 2025-3-22 20:25
Semantics in spatial databases,atial databases are under consideration. A semantics for both data models is formally defined in terms of finite representations of spatial databases in the data models. We also present languages to query spatial databases in both models and briefly investigate their expressiveness.作者: 字形刻痕 時(shí)間: 2025-3-23 00:50 作者: 不規(guī)則 時(shí)間: 2025-3-23 01:56 作者: jungle 時(shí)間: 2025-3-23 09:37
An informal and efficient approach for obtaining semantic constraints using sample data and natural The efficiency and correctness of a database depends among other things on knowledge about database semantics because semantic constraints are the prerequisite for normalization and restructuring operations. Acquisition of semantic constraints remains one of the bottlenecks in database design becau作者: HEDGE 時(shí)間: 2025-3-23 13:01
Achievements of relational database schema design theory revisited,ema design aims at both faithful formalization of the application and optimization at design time. It is guided by four heuristics: Separation of Aspects, Separation of Specializations, Inferential Completeness and Unique Flavor. A theory of schema design is to investigate these heuristics and to pr作者: Chivalrous 時(shí)間: 2025-3-23 17:10 作者: 小步舞 時(shí)間: 2025-3-23 20:34
The evolving algebra semantics of class and role hierarchies,bras provide an elegant way to specify the operational semantics of object-oriented data models. In particular, we define the formal semantics of a novice feature of object-oriented data models proposed recently by different authors: role hierarchies. As opposed to traditional class hierarchies, rol作者: arthroplasty 時(shí)間: 2025-3-24 02:04
Semantics in spatial databases,model is particularly suited to model spatial database applications in which exact geometrical information is required and in which this information can be approximated by linear geometrical spatial objects. The topological model on the other hand is suitable for applications in which rather than ex作者: 小木槌 時(shí)間: 2025-3-24 03:07
The additivity problem for data dependencies in incomplete relational databases,tabases. We introduce null functional dependencies (NFDs) and null inclusion dependencies (NINDs) to cater for the situation when a database is incomplete and thus contains null values. If a NFD or NIND is weakly satisfied in a database, then there exists a possible world of this database in which t作者: 領(lǐng)帶 時(shí)間: 2025-3-24 09:17
A semantics-based approach to design of query languages for partial information,y in the presence of nulls. In this paper a different point of view is advocated. We believe that the semantics of partiality must be clearly understood and it should give us new design principles for languages for databases with partial information..There are different sources of partial informatio作者: 貪婪地吃 時(shí)間: 2025-3-24 13:09
Constraint databases: A survey,nt databases: known results, remaining open problems and current research directions. The paper also describes a new algebra for databases with integer order constraints and a complexity analysis of evaluating queries in this algebra.作者: MUTE 時(shí)間: 2025-3-24 17:37
Redundancy elimination and a new normal form for relational database design,ain functional dependencies (FDs) and arbitrary join dependencies (JDs). Extending previous work on the relationship between fourth normal form (4NF) and redundancy elimination, a general definition of redundancy is proposed which is applicable to any type of relational dependency including arbitrar作者: 共同確定為確 時(shí)間: 2025-3-24 22:16 作者: Ventilator 時(shí)間: 2025-3-24 23:56 作者: 古董 時(shí)間: 2025-3-25 07:14
Semantics in Databases978-3-540-69700-8Series ISSN 0302-9743 Series E-ISSN 1611-3349 作者: 代理人 時(shí)間: 2025-3-25 08:38 作者: 組裝 時(shí)間: 2025-3-25 12:33 作者: embolus 時(shí)間: 2025-3-25 18:39 作者: 思想靈活 時(shí)間: 2025-3-25 20:11 作者: 忘恩負(fù)義的人 時(shí)間: 2025-3-26 03:31 作者: 高調(diào) 時(shí)間: 2025-3-26 06:35 作者: 表示向前 時(shí)間: 2025-3-26 12:22
Analysis of Future Measurement Incorporation into Unscented Predictive Motion Planningwo-wheeled robot is selected as the example nonholonomic system. A predictive motion planning scheme is used to find the suboptimal control inputs. In addition to the nonholonomic constraint, state estimation and collision avoidance chance constraints are incorporated to the predictive scheme. The c作者: DEAWL 時(shí)間: 2025-3-26 16:30 作者: BANAL 時(shí)間: 2025-3-26 17:06 作者: 到婚嫁年齡 時(shí)間: 2025-3-26 21:27 作者: 蝕刻術(shù) 時(shí)間: 2025-3-27 03:47
Belongingness as the Foundation of Social and Emotional Development: Focus on Black Infants, Toddlermotional well-being depends upon achievingf a cohesive and positive sense of belongingness. Social and emotional development, the domains that comprise mental health and wellness across the lifespan, are often conceptualized in behavioral terms for the earliest period of life and without this contex作者: 存在主義 時(shí)間: 2025-3-27 07:58 作者: 厚顏 時(shí)間: 2025-3-27 10:58 作者: 圍巾 時(shí)間: 2025-3-27 15:35 作者: 西瓜 時(shí)間: 2025-3-27 21:21
Sebastian Halsbenning,Marco Niemann,Michael R?ckers,Hendrik Scholtathe evolution of policy response for hunger and nutrition security, the book covers aspects such as gender budgeting, dietary diversity, women’s empowerment, calorie intake norms, socio-legal aspects of the right to health, subjective wellbeing, bio-fortification, crop insurance, and food security l作者: GIDDY 時(shí)間: 2025-3-28 00:57 作者: Cumulus 時(shí)間: 2025-3-28 02:48
The Boundary as a Watershed for Taxationan gateway, the Nile valley around the Second Cataract, had been fortified during the Middle Kingdom with a series of impressive fortresses. The Semna stelae of Sesostris III perfectly define the function of the gateway as a filter permitting only the desired goods (not men) to enter from an outer r作者: EXALT 時(shí)間: 2025-3-28 07:56 作者: ellagic-acid 時(shí)間: 2025-3-28 14:24 作者: fatty-streak 時(shí)間: 2025-3-28 15:04
Guide to Biomolecular Simulationspologischen überlegungen zum Begriff des Paradoxen verwiesen. An Hand von Analysen zweier paradigmatischer früher Schriften Kleists — dem . und dem Martini-Brief — konnte die Tendenz zur paradoxalen Argumentation im Dienst jenes Wahrheitsverst?ndnisses nachvollzogen werden.作者: 有法律效應(yīng) 時(shí)間: 2025-3-28 19:18
Statistical Formulation of the Problem of Turbulence,e .) in a fully developed turbulent flow accurately. It is thus suggested to consider only . of these generalized coordinates. Accordingly, successful approaches to hydrodynamic turbulence have to involve a treatment of the deterministic equations of fluid mechanics via statistical and stochastic methods.
