120 research outputs found
ΠΡΠΏΠΎΠ»ΡΠ·ΠΎΠ²Π°Π½ΠΈΠ΅ Π½Π°Π±ΠΎΡΠ° Π΄ΠΈΠ°Π³ΡΠ°ΠΌΠΌ UML Π΄Π»Ρ ΠΏΠΎΡΡΡΠΎΠ΅Π½ΠΈΡ ΠΌΠΎΠ΄Π΅Π»Π΅ΠΉ ΠΏΡΠΎΠΈΠ·Π²ΠΎΠ΄ΠΈΡΠ΅Π»ΡΠ½ΠΎΡΡΠΈ
Π Π°ΡΡΠΌΠ°ΡΡΠΈΠ²Π°Π΅ΡΡΡ Π²ΠΎΠ·ΠΌΠΎΠΆΠ½ΠΎΡΡΡ Π³Π΅Π½Π΅ΡΠ°ΡΠΈΠΈ ΠΌΠΎΠ΄Π΅Π»Π΅ΠΉ ΠΏΡΠΎΠΈΠ·Π²ΠΎΠ΄ΠΈΡΠ΅Π»ΡΠ½ΠΎΡΡΠΈ ΠΏΡΠΎΠ³ΡΠ°ΠΌΠΌΠ½ΠΎΠ³ΠΎ ΠΎΠ±Π΅ΡΠΏΠ΅ΡΠ΅Π½ΠΈΡ Π½Π° ΠΎΡΠ½ΠΎΠ²Π΅ Π΄ΠΈΠ°Π³ΡΠ°ΠΌΠΌ Π² Π½ΠΎΡΠ°ΡΠΈΠΈ UML ΠΊΠ°ΠΊ ΠΎΠ΄Π½Π° ΠΈΠ· Π±Π°Π·ΠΎΠ²ΡΡ
ΡΠΎΡΡΠ°Π²Π»ΡΡΡΠΈΡ
ΠΌΠ΅ΡΠΎΠ΄ΠΎΠ»ΠΎΠ³ΠΈΠΈ ΠΈΠ½ΡΠ΅Π³ΡΠ°ΡΠΈΠΈ Π°Π½Π°Π»ΠΈΠ·Π° ΠΏΡΠΎΠΈΠ·Π²ΠΎΠ΄ΠΈΡΠ΅Π»ΡΠ½ΠΎΡΡΠΈ Π² ΠΏΡΠΎΡΠ΅ΡΡ ΡΠ°Π·ΡΠ°Π±ΠΎΡΠΊΠΈ. ΠΡΠ΅Π΄Π»ΠΎΠΆΠ΅Π½ ΠΏΠΎΠ΄Ρ
ΠΎΠ΄, ΠΎΡΠ½ΠΎΠ²Π°Π½Π½ΡΠΉ Π½Π° ΠΌΠ΅ΡΠΎΠ΄ΠΎΠ»ΠΎΠ³ΠΈΠΈ Software Performance Engineering (SPE), ΠΈΡΠΏΠΎΠ»ΡΠ·ΡΡΡΠΈΠΉ Π² ΠΊΠ°ΡΠ΅ΡΡΠ²Π΅ ΠΈΡΡ
ΠΎΠ΄Π½ΡΡ
Π΄Π°Π½Π½ΡΡ
ΡΡΠ°Π½Π΄Π°ΡΡΠ½ΡΠ΅ ΡΠ»Π΅ΠΌΠ΅Π½ΡΡ UML ΠΈ ΡΡΠ΄ ΡΠ°ΡΡΠΈΡΠ΅Π½ΠΈΠΉ
ΠΡΠΏΠΎΠ»ΡΠ·ΠΎΠ²Π°Π½ΠΈΠ΅ Π½Π°Π±ΠΎΡΠ° Π΄ΠΈΠ°Π³ΡΠ°ΠΌΠΌ UML Π΄Π»Ρ ΠΏΠΎΡΡΡΠΎΠ΅Π½ΠΈΡ ΠΌΠΎΠ΄Π΅Π»Π΅ΠΉ ΠΏΡΠΎΠΈΠ·Π²ΠΎΠ΄ΠΈΡΠ΅Π»ΡΠ½ΠΎΡΡΠΈ
Π Π°ΡΡΠΌΠ°ΡΡΠΈΠ²Π°Π΅ΡΡΡ Π²ΠΎΠ·ΠΌΠΎΠΆΠ½ΠΎΡΡΡ Π³Π΅Π½Π΅ΡΠ°ΡΠΈΠΈ ΠΌΠΎΠ΄Π΅Π»Π΅ΠΉ ΠΏΡΠΎΠΈΠ·Π²ΠΎΠ΄ΠΈΡΠ΅Π»ΡΠ½ΠΎΡΡΠΈ ΠΏΡΠΎΠ³ΡΠ°ΠΌΠΌΠ½ΠΎΠ³ΠΎ ΠΎΠ±Π΅ΡΠΏΠ΅ΡΠ΅Π½ΠΈΡ Π½Π° ΠΎΡΠ½ΠΎΠ²Π΅ Π΄ΠΈΠ°Π³ΡΠ°ΠΌΠΌ Π² Π½ΠΎΡΠ°ΡΠΈΠΈ UML ΠΊΠ°ΠΊ ΠΎΠ΄Π½Π° ΠΈΠ· Π±Π°Π·ΠΎΠ²ΡΡ
ΡΠΎΡΡΠ°Π²Π»ΡΡΡΠΈΡ
ΠΌΠ΅ΡΠΎΠ΄ΠΎΠ»ΠΎΠ³ΠΈΠΈ ΠΈΠ½ΡΠ΅Π³ΡΠ°ΡΠΈΠΈ Π°Π½Π°Π»ΠΈΠ·Π° ΠΏΡΠΎΠΈΠ·Π²ΠΎΠ΄ΠΈΡΠ΅Π»ΡΠ½ΠΎΡΡΠΈ Π² ΠΏΡΠΎΡΠ΅ΡΡ ΡΠ°Π·ΡΠ°Π±ΠΎΡΠΊΠΈ. ΠΡΠ΅Π΄Π»ΠΎΠΆΠ΅Π½ ΠΏΠΎΠ΄Ρ
ΠΎΠ΄, ΠΎΡΠ½ΠΎΠ²Π°Π½Π½ΡΠΉ Π½Π° ΠΌΠ΅ΡΠΎΠ΄ΠΎΠ»ΠΎΠ³ΠΈΠΈ Software Performance Engineering (SPE), ΠΈΡΠΏΠΎΠ»ΡΠ·ΡΡΡΠΈΠΉ Π² ΠΊΠ°ΡΠ΅ΡΡΠ²Π΅ ΠΈΡΡ
ΠΎΠ΄Π½ΡΡ
Π΄Π°Π½Π½ΡΡ
ΡΡΠ°Π½Π΄Π°ΡΡΠ½ΡΠ΅ ΡΠ»Π΅ΠΌΠ΅Π½ΡΡ UML ΠΈ ΡΡΠ΄ ΡΠ°ΡΡΠΈΡΠ΅Π½ΠΈΠΉ
Taguchi approach for performance evaluation of service-oriented software systems.
Service-oriented software systems are becoming increasingly common in the world today as big companies such as Microsoft and IBM advocate approaches focusing on assembly of system from distributed services. Although performance of such systems is a big problem, there is surprisingly an obvious lack of attention for evaluating the performance of enterprise-scale, service-oriented software systems. This thesis investigates the application of statistical tools in performance engineering domain for total quality management. In particular, the Taguchi approach is used as an efficient and systematic way to optimize designs for performance, quality, and cost. The aim is to improve the performance of software systems and to reduce application development cost by assembling services from known vendors or intranet services. The focus of this thesis is on the response time of service-oriented systems. Nevertheless, the developed methodology also applies to other performance issues, such as memory management and caching. The interaction problems of those issues are preserved for future work.Dept. of Computer Science. Paper copy at Leddy Library: Theses & Major Papers - Basement, West Bldg. / Call Number: Thesis2004 .L585. Source: Masters Abstracts International, Volume: 43-01, page: 0240. Adviser: Xiaobu Yuan. Thesis (M.Sc.)--University of Windsor (Canada), 2004
Performance by Unified Model Analysis (PUMA)
Evaluation of non-functional properties of a design (such as performance, dependability, security, etc.) can be enabled by design annotations specific to the property to be evaluated. Performance properties, for instance, can be annotated on UML designs by using the UML Profile for Schedulability, Performance and Time (SPT) . However the communication between the design description in UML and the tools used for non-functional properties evaluation requires support, particularly for performance where there are many alternative performance analysis tools that might be applied. This paper describes a tool architecture called PUMA, which provides a unified interface between different kinds of design information and different kinds of performance models, for example Markov models, stochastic Petri nets and process algebras, queues and layered queues. The paper concentrates on the creation of performance models. The unified interface of PUMA is centered on an intermediate model called Core Scenario Model (CSM), which is extracted from the annotated design model. Experience shows that CSM is also necessary for cleaning and auditing the design information, and providing default interpretations in case it is incomplete, before creating a performance model
Configuration of Distributed Message Converter Systems using Performance Modeling
To find a configuration of a distributed system satisfying performance goals is a complex search problem that involves many design parameters, like hardware selection, job distribution and process configuration. Performance models are a powerful tools to analyse potential system configurations, however, their evaluation is expensive, such that only a limited number of possible configurations can be evaluated. In this paper we present a systematic method to find a satisfactory configuration with feasible effort, based on a two-step approach. First, using performance estimates a hardware configuration is determined and then the software configuration is incrementally optimized evaluating Layered Queueing Network models. We applied this method to the design of performant EDI converter systems in the financial domain, where increasing message volumes need to be handled due to the increasing importance of B2B interaction
A Review on Software Performance Analysis for Early Detection of Latent Faults in Design Models
Organizations and society could face major breakdown if IT strategies do not comply with performance requirements. This is more so in the era of globalization and emergence of technologies caused more issues. Software design models might have latent and potential issues that affect performance of software. Often performance is the neglected area in the industry. Identifying performance issues in the design phase can save time, money and effort. Software engineers need to know the performance requirements so as to ensure quality software to be developed. Software performance engineering a quantitative approach for building software systems that can meet performance requirements. There are many design models based on UML, Petri Nets and Product-Forms. These models can be used to derive performance models that make use of LQN, MSC, QNM and so on. The design models are to be mapped to performance models in order to predict performance of system early and render valuable feedback for improving quality of the system. Due to emerging distributed technologies such as EJB, CORBA, DCOM and SOA applications became very complex with collaboration with other software. The component based software systems, software systems that are embedded, distributed likely need more systematic performance models that can leverage the quality of such systems. Towards this end many techniques came into existence. This paper throws light into software performance analysis and its present state-of-the-art. It reviews different design models and performance models that provide valuable insights to make well informed decisions
Many-Objective Optimization of Non-Functional Attributes based on Refactoring of Software Models
Software quality estimation is a challenging and time-consuming activity, and
models are crucial to face the complexity of such activity on modern software
applications. In this context, software refactoring is a crucial activity
within development life-cycles where requirements and functionalities rapidly
evolve. One main challenge is that the improvement of distinctive quality
attributes may require contrasting refactoring actions on software, as for
trade-off between performance and reliability (or other non-functional
attributes). In such cases, multi-objective optimization can provide the
designer with a wider view on these trade-offs and, consequently, can lead to
identify suitable refactoring actions that take into account independent or
even competing objectives. In this paper, we present an approach that exploits
NSGA-II as the genetic algorithm to search optimal Pareto frontiers for
software refactoring while considering many objectives. We consider performance
and reliability variations of a model alternative with respect to an initial
model, the amount of performance antipatterns detected on the model
alternative, and the architectural distance, which quantifies the effort to
obtain a model alternative from the initial one. We applied our approach on two
case studies: a Train Ticket Booking Service, and CoCoME. We observed that our
approach is able to improve performance (by up to 42\%) while preserving or
even improving the reliability (by up to 32\%) of generated model alternatives.
We also observed that there exists an order of preference of refactoring
actions among model alternatives. We can state that performance antipatterns
confirmed their ability to improve performance of a subject model in the
context of many-objective optimization. In addition, the metric that we adopted
for the architectural distance seems to be suitable for estimating the
refactoring effort.Comment: Accepted for publication in Information and Software Technologies.
arXiv admin note: substantial text overlap with arXiv:2107.0612
Automatic generation of digital twin industrial system from a high level specification
A framework for the generation of industrial digital twins is presented in the paper. The framework supports industry automated systems preliminary design development, but also supports the following detailed designs implementation and final systems exploitation phases. The main problem is that requirements for first development phases are much more generic than those required for the later phases. The framework faces this problem by avoiding too detailed specifications for the digital twin generated software, but, at the same time, it takes advantage of the specific applications developed for each industrial implementation where that specificities are taken into account: the final control application and the management application. By properly linking both: the more generic digital twin and specific software applications specifically generated for the industry system, the framework may be ready to be used soon at the early development stages, but also may be used for detailed analyses at late booting and maintenance industry system phases. The system has been specialized in industrial transportation and warehouse systems. The paper presents an example of application for this kind of system
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