把…比做
发表于 2025-3-23 12:58:16
Stephane Ploix,Amr Alzouhri Alyafiis to minimize the extensions required in SQL, or other relational languages, to support spatio-temporal queries. We build on the model proposed by Worboys where each state of a spatial object is captured as a snapshot of time; then, we use a directed-triangulation model to represent spatial data, a
agonist
发表于 2025-3-23 15:02:39
http://reply.papertrans.cn/24/2351/235021/235021_12.png
Hirsutism
发表于 2025-3-23 19:40:06
Concept for Energy Transparent Factories,y pivoting provides a similar concept. Pivoting has been introduced by Biskup et al. [.], and used for decomposing relationship types according to a unary nonkey functional dependency. Our objective is to study pivoting in the presence of cardinality constraints which are commonly used in semantic d
Engulf
发表于 2025-3-23 22:40:00
The Life and Death of Software Ecosystems,Unlike for databases, there is no agreement on what constitutes “IS principles.” Any significantly advanced IS contains some kind of a database system. On the other hand, any useful database system is actually an IS, providing additional services beyond simply maintaining data and running queries an
placebo
发表于 2025-3-24 05:11:54
International and Development Educationling approach or representation. Different representations such as entity-relationship modelling, data ow modelling and use case modelling allow analysts to describe different aspects of real- world phenomena, thus providing a more thorough understanding than if a single representation were used. Re
的’
发表于 2025-3-24 07:06:32
International and Development Education for improving the speed of access to the information in the data warehouse. So, the selection of materialized views is crucial to the operation of the data warehouse both with respect to maintenance and speed of access. Most research to date has treated the selection of materialized views as an opt
opprobrious
发表于 2025-3-24 12:29:25
http://reply.papertrans.cn/24/2351/235021/235021_17.png
辫子带来帮助
发表于 2025-3-24 17:34:11
International and Development Educationexisting solutions. The idea of reuse itself is not novel and the ability of reuse is even a part of the learning process. However, not much support for reuse can be found for the analysis phase of information systems design. Collecting reusable solutions, called patterns, in a library and supportin
manifestation
发表于 2025-3-24 19:31:08
http://reply.papertrans.cn/24/2351/235021/235021_19.png
无情
发表于 2025-3-25 01:49:21
Remco Hoogma,Matthias Weber,Boelie Elzensed or tree-based data models for the web only provide a very low level representation of such hierarchical structure. In this paper, we introduce a conceptual model for the web that is able to represent the complex hierarchical structure within the web documents at a high level that is close to hum