Event notification services are used in various applications such as digital
libraries, stock tickers, traffic control, or facility management. However to
our knowledge, a common semantics of events in event notification services has
not been defined so far. We propose a parameterized event algebra which
describes the semantics of composite events for event notification systems. The
parameters ser... hiện toàn bộ
#Algebra #Logistics #Temperature sensors #Software libraries #Filtering #Database systems #Clocks
Chúng tôi giới thiệu một logic thời gian để lý luận về các ứng dụng toàn cầu.
Trước tiên, chúng tôi định nghĩa một logic mô-đun cho địa phương tính, nhúng các
lý thuyết địa phương của mỗi thành phần vào một lý thuyết về các trạng thái phân
tán của hệ thống. Chúng tôi cung cấp cho logic một hệ thống tiên đề đầy đủ và
chuyên sâu. Sau đó, chúng tôi mở rộng logic với một toán tử thời gian. Đóng góp
củ... hiện toàn bộ
#Logic #DSL #Đồng hồ #Giao tiếp bất đồng bộ #Ngôn ngữ đặc tả #Điện toán đồng thời #Điện toán phân tán #Trì hoãn #Điện toán phổ biến #Thư viện thời gian chạy
This paper describes a continuous planning framework to be used by a planning
agent situated within an environment, which reasons about goals with priorities
and deadlines, and actions with duration. The framework assumes that goals may
be generated continuously, which requires the interleaving of planning and
execution. Constraints upon time may mean it is not possible for all goals to be
achieve... hiện toàn bộ
We show the expressiveness provided by a labelled point-based metric model for
specifying and reasoning about complex disjunctive temporal constraints. The
model allows us to manage disjunctive assertions, conjunctive and hypothetical
queries, and one-to-many constraints. Additionally, it becomes an adequate
support for reasoning on costs associated to constraints.
Local search techniques have attracted considerable interest in the artificial
intelligence (AI) community since the development of GSAT (Selman et al., 1992)
and the min-conflicts heuristic (Minton et al., 1992) for solving large
propositional satisfiability (SAT) problems and binary constraint satisfaction
problems (CSPs) respectively. Newer SAT techniques, such as the Discrete
Langrangian Metho... hiện toàn bộ
In this paper, we focus on an application and extension of artificial
intelligence temporal reasoning techniques in order to represent and reason with
temporal constraints in clinical guidelines. Particular attention is dedicated
to the treatment of repeated (periodic) events, which play a major role in
clinical therapies. We also discuss some limitations of our current approach,
highlighting poss... hiện toàn bộ
We evaluate a model for temporal data utilizing the benefits of
object-relational database systems (ORDBS). In particular we show how attribute
timestamping can be efficiently implemented in state-of-the-art ORDBS. The
attribute timestamping concept is based on introducing user-specific types for
temporal versions of datatypes. Moreover on the physical level we make use of
user-defined index struc... hiện toàn bộ
#Object oriented modeling #Indexing #Spatial indexes #Relational databases #Information systems #Database systems #Data models #Spatial databases #Size measurement
Representing and reasoning with both temporal constraints between classes of
events (e.g., between the types of actions needed to achieve a goal) and
temporal constraints between instances of events (e.g., between the specific
actions being executed) is a ubiquitous task in many areas of computer science,
such as planning, workflow, guidelines and protocol management. The temporal
constraints betw... hiện toàn bộ
A growing number of industrial applications use rule-based programming.
Frequently, the implementation of the inference engine embedded in these
applications is based on the RETE algorithm. Some applications supervise a flow
of events in which time, through the occurrence dates of the events, plays an
important role. These applications need to be able to recognize patterns
involving events. Howeve... hiện toàn bộ