Universal software packages to model the distributed-parameter systems

Consideration was given to the universal software packages for modeling objects and distributed-parameter systems obeying the partial differential equations. The packages may serve as important tools for industrial automation because the majority of industrial objects have distributed parameters. The review presented the results of comparing a number of commercial packages against a set of user-defined criteria. Its final part was devoted to some freeware packages. Conclusions were drawn, and recommendations for using the considered packages were given.     

A comparative study of the reliability of nine statistical software packages

The reliabilities of nine software packages commonly used in performing statistical analysis are assessed and compared. The (American) National Institute of Standards and Technology (NIST) data sets are used to evaluate the performance of these software packages with regard to univariate summary statistics, one-way ANOVA, linear regression, and nonlinear regression. Previous research has examined various versions of these software packages using the NIST data sets, but typically with fewer software packages than used in this study. This study provides insight into a relative comparison of a wide variety of software packages including two free statistical software packages, basic and advanced statistical software packages, and the popular Excel package. Substantive improvements from previous software reliability assessments are noted. Plots of principal components of a measure of the correct number of significant digits reveal how these packages tend to cluster for ANOVA and nonlinear regression.     

User documentation and control language I: Evaluation and comparison of statistical computer packages

Procedures for comparing and evaluating aspects of the user interface of statistical computer packages are described. These procedures are implemented in a study of three packages. SPSS. BMDP and Minitab, by a class of 21 students with some statistical background. It was found that most participants exhibited consistent personal preferences among the packages. In selecting packages to solve specific problems, however, their choice was determined more by issues of good statistical practice than by personal preference for overall package features.     

On Locating Malicious Code in Piggybacked Android Apps

To devise efficient approaches and tools for detecting malicious packages in the Android ecosystem, researchers are increasingly required to have a deep understanding of malware. There is thus a need to provide a framework for dissecting malware and locating malicious program fragments within app code in order to build a comprehensive dataset of malicious samples. Towards addressing this need, we propose in this work a tool-based approach called HookRanker, which provides ranked lists of potentially malicious packages based on the way malware behaviour code is triggered. With experiments on a ground truth of piggybacked apps, we are able to automatically locate the malicious packages from piggybacked Android apps with an accuracy@5 of 83.6% for such packages that are triggered through method invocations and an accuracy@5 of 82.2% for such packages that are triggered independently.     

The computation algorithm of capacity indices of the telecommunication networks with repeated transmissions

The results are presented of the investigation of an approximate method for the calculation of characteristics of the telecommunication network of commutation of packages with a bounded buffer storage of nodes and retrials of transmissions of packages from sources and transit nodes. As a model of the telecommunication network use is made of the queuing network (QN) represented by an aggregate of isolated queuing systems (QS’s) with bounded accumulators and retrials of transmissions. The algorithm is suggested for the verification of realizability of primary input flows (delivery of all incoming packages to the appropriate finite nodes in the finite time) and the computation of blocking probabilities of nodes, the load of transmission links, mean values of the number of packages, and the dwell time of packages in the network operating in the stationary mode.     

Evaluating and selecting software packages: A review

Evaluating and selecting software packages that meet an organization’s requirements is a difficult software engineering process. Selection of a wrong software package can turn out to be costly and adversely affect business processes. The aim of this paper is to provide a basis to improve the process of evaluation and selection of the software packages. This paper reports a systematic review of papers published in journals and conference proceedings. The review investigates methodologies for selecting software packages, software evaluation techniques, software evaluation criteria, and systems that support decision makers in evaluating software packages. The key findings of the review are: (1) analytic hierarchy process has been widely used for evaluation of the software packages, (2) there is lack of a common list of generic software evaluation criteria and its meaning, and (3) there is need to develop a framework comprising of software selection methodology, evaluation technique, evaluation criteria, and system to assist decision makers in software selection.     

Using structural and semantic measures to improve software modularization

Changes during software evolution and poor design decisions often lead to packages that are hard to understand and maintain, because they usually group together classes with unrelated responsibilities. One way to improve such packages is to decompose them into smaller, more cohesive packages. The difficulty lies in the fact that most definitions and interpretations of cohesion are rather vague and the multitude of measures proposed by researchers usually capture only one aspect of cohesion. We propose a new technique for automatic re-modularization of packages, which uses structural and semantic measures to decompose a package into smaller, more cohesive ones. The paper presents the new approach as well as an empirical study, which evaluates the decompositions proposed by the new technique. The results of the evaluation indicate that the decomposed packages have better cohesion without a deterioration of coupling and the re-modularizations proposed by the tool are also meaningful from a functional point of view.     

计及Spark和属性权重的售电套餐推荐方法

针对电力市场用户群庞大，交易过程中售电套餐选择困难的问题，在Spark环境下设计了一种售电套餐推荐方法，同时也解决了售电套餐推荐过程中在大数据环境下的可扩展性及实时性问题。首先，计算出每个套餐属性的权重值，从而计算得到售电套餐综合相似度。然后，计及用户和套餐两方面提出一种售电套餐推荐方法，实现售电套餐的精准推荐。实验表明，提出的推荐方法能够明显提高推荐的准确度，并且在分布式环境下具有良好的推荐效率和可扩展性。     

Free and Open Source Software versus Internet content filtering and censorship: A case study

This study critically investigates the main characteristics and features of anti-filtering packages provided by Free and Open Source Software (FOSS). For over a decade, the digital communities around the globe have used FOSS packages not only as an inexpensive way to access to information available on Internet, but also to disseminate thoughts, opinions and concerns about various socio-political and economic matters. Proxy servers and FOSS played a vital role in helping citizens in repressed countries to bypass the state imposed Internet content filtering and censorship practices. On the one hand, proxy servers act as redirectors to websites, and on the other hand, many of these servers are the main source for downloading FOSS anti-filtering software packages. These packages can provide secure web surfing via anonymous web access, data encryption, IP address masking, location concealment, browser history and cookie clean-ups but they also provide proxy software updates as well as domain name updates.The main objectives of this study are to investigate the role of FOSS packages in combating Internet content filtering and censorship and empowering citizens to effectively participate in communication discourse. By evaluating some of the well known FOSS anti-filtering packages used by Iran's digital community, this study found that despite the success of FOSS in combating filtering and state censorship, the majority of these software packages were not designed to meet the needs of Internet users. In particular, they are poorly adapted to the slow Internet connections in many developing countries such as Iran. In addition, these software packages do not meet the level of sophistication used by authorities to filter the content of the Net. Therefore, this study offers a new model that takes into account not only the existing level of the Internet infrastructure but also the growing number of Internet users demanding more effective FOSS packages for faster access to uncensored information while maintaining anonymity.     

飞行模拟机数据包发展综述

对波音和空客的飞行模拟机数据包发展历史、现状和技术特点进行了介绍和分析,同时对国产ARJ21飞机和MA60飞机模拟机数据包的发展、内容和技术特点进行了介绍.在此基础上,重点分析了传统数据包在仿真结果一致性、知识产权保护、模拟机研制和鉴定等方面的局限性,提出了国产民机飞行模拟机数据包在二进制数据包、试飞数据、座舱硬件、仿真航电以及技术服务体系等方面的发展建议.对于二进制数据包,建议分为核心性能仿真模型二进制和全部仿真模型二进制两个阶段进行.     

Design and implementation of maple packages for processing offsets and conchoids

In this paper we present two packages, implemented in the computer algebra system Maple, for dealing with offsets and conchoids to algebraic curves, respectively. Help pages and procedures are described. Also in an annex, we provide a brief atlas, created with these packages, and where the offset and the conchoid of several algebraic plane curves are obtained, their rationality is analyzed, and parametrizations are computed. Practical performance of the implemented algorithms shows that the packages execute in reasonable time; we include time cost tables of the computation of the offset and conchoid curves of two rational families of curves using the implemented packages.     

Efficiency analysis of ERP packages—A customization perspective

Enterprise Resource Planning (ERP) packages developed by ERP vendors are designed not only to standardize the existing business processes of the implementing organization, but also to bring in some of the best practices of the industry. There are many past studies on the assessment of the efficiency of standard ERP projects; however, to date no research has been conducted to assess the efficiency of ERP packages from the point of view of customization. Assessing the efficiency of customized ERP packages is vital for benchmarking best customization practices. In this study we examine the efficiency of customized ERP packages using Data Envelopment Analysis (DEA). We also examine the relationship between the degree of customization of ERP packages and their efficiency. Data was collected from an IT vendor who had deployed ERP package in 12 educational institutions. The results suggest that customization adversely affects the efficiency of ERP packages. We also discuss the implications of the results for research and practice.     

软件可靠性的UML建模研究与设计

本文提出了一个针对软件可靠性建模和评估的UML剖面,标识了这个剖面的主要组成包并且给出了需要包括在这些包中的基本元素的详细定义。     

软件可靠性的UML建模研究与设计

本文提出了一个针对软件可靠性建模和评估的UML剖面，标识了这个剖面的主要组成包并且给出了需要包括在这些包中的基本元素的详细定义。     

面向操作系统版本构建的软件包依赖关系分析

基于Linux的开源操作系统发行版本通常都是由一系列相互关联的软件包构建而成,由于软件包数量庞大、互相之间依赖和冲突等关系复杂,操作系统版本构建也变得复杂,定制裁剪的粒度和精度不足,可能存在很多冗余软件包。目前,操作系统版本的构建主要还是根据工程经验进行组织,特别是软件包的选择缺少理论分析和指导。给出基于依赖关系的操作系统版本构建的基本模型,并结合Ubuntu开源发行版本的版本构建过程和软件仓库数据,对软件包的出入度、优先级和分类等特征进行统计分析和模型验证,从依赖关系角度总结出操作系统版本构建的主要原则,为后续提升版本自动化定制裁剪的精度以及软件发行演化和故障分析提供指导和重要参考。     

The Package Blueprint: Visually analyzing and quantifying packages dependencies

Large object-oriented applications are structured over many packages. Packages are important but complex structural entities that are difficult to understand since they act as containers of classes, which can have many dependencies with other classes spread over multiple packages. However to be able to take decisions (e.g. refactoring and/or assessment decisions), maintainers face the challenges of managing (sorting, grouping) the massive amount of dependencies between classes spread over multiple packages. To help maintainers, there is a need for at the same time understanding, and quantifying, dependencies between classes as well as understanding how packages as containers of such classes depend on each other.In this paper, we present a visualization, named Package Blueprint, that reveals in detail package internal structure, as well as the dependencies between an observed package and its neighbors, at both package and class levels. Package blueprint aims at assisting maintainers in understanding package structure and dependencies, in particular when they focus on few packages and want to take refactoring decisions and/or to assess the structure of those packages. A package blueprint is a space filling matrix-based visualization, using two placement strategies that are enclosure and adjacency. Package blueprint is structured around the notion of surfaces that group classes and their dependencies by their packages (i.e., enclosure placement); whilst surfaces are placed next to their parent node which is the package under-analysis (i.e., adjacency placement). We present two views: one stressing how an observed package depends upon the rest of the system and another stressing how the system depends upon that package.To evaluate the contribution of package blueprint for understanding packages we performed an exploratory user study comparing package blueprint with an advanced IDE. The results show that users of package blueprint are faster in analyzing and assessing package structure. The results are proved statically significant and they show that package blueprint considerably improves the experience of standard browser users.     

A model for the evaluation of computer software packages

The tremendous increase in recent years in the demand for, and availability of, computer software packages, has led researchers to investigate better ways of evaluating them for selection. The selection of software packages is confounded because criteria for evaluation are dependent on the system type. For example, decision support systems should be judged largely on the basis of subjective criteria, while transaction processing systems can be evaluated primarily on quantifiable factors. We discuss the use of a well-known model used in site selection, as a means to evaluate software packages according to subjective or objective factors. We illustrate application of the model with a small example.     

Towards automated progress assessment of workpackage components in construction projects using computer vision

Traditional methods of collecting data on the progress of construction projects often involve human judgement, high costs, and are too infrequent to provide managers with timely and accurate control data. This study proposes a system that aims to address some of these shortcomings through automation. Our first contribution is a framework for the automatic generation of work packages. We describe the conceptual model and develop a prototype implementation, based on the results of a survey designed to capture the current practice of formulating work packages as performed in the industry. Our second contribution is a system that employs computer vision (CV) techniques to report on the progress of these work packages automatically. This is achieved by analysing sequences of digital images acquired regularly by on-site cameras. The result of this analysis, when compared with the expected state of construction, provides progress feedback on the work packages, allowing a project to be monitored more effectively.