网络攻击方案评估系统设计与仿真

从攻击者角度出发提出一个基于RBF神经网络的网络攻击方案评估系统用于网络安全态势分析.提出涵盖了攻击方案中所涉及的攻防双方特性的评估指标体系,利用模糊层次分析法对指标数据进行模糊综合处理,采用RBF神经网络对攻击方案的效能进行推理,使系统具备自学习的能力,实现对整体攻击方案对受攻击的网络的影响程度的预测.仿真实验结果表明,系统能较客观地反映网络攻击方案针对不同防护能力目标所产生的危害,为推理分析出攻击者可能采取的攻击思路和手段提供参考.     

Making use of scenarios for validating analysis and design

Scenarios can help remedy the most serious obstacle in the design process that is a chronic lack of knowledge of the application domain. Moreover, scenarios can be employed in analysis and design to serve both illustrating the context of an envisaged usage (user's perspective) and demonstrating the design proposal in terms of the intended usage (analyst's perspective). In contrasting both perspectives by means of a dialectic process a synthesis can be achieved that incorporates a shared understanding. Validation is a process to achieve such an understanding. The semantic structure of types of scenarios is investigated thus illustrating how a context of use analysis according to ISO 9241-11 can be exploited for validation purposes. The role of scenarios in usability engineering is contrasted with traditional concepts of systems analysis as an attempt to narrow the bridge between software engineering and usability engineering     

The design and use of laboratory experiments for DSS evaluation

DSS evaluation may be either ex-post or ex-ante. In the former, evaluation focuses on determining the actual result of DSS implementation. In the latter, emphasis is on predicting the likely impact of DSS alternatives on a given task set or on estimating relationships between DSS characteristics and task set(s) performance. If a firm can, ex-ante, effectively estimate or predict the performance of varying DSS on arrays of tasks or task sets, then it can avoid costly DSS selection errors and gain competitive and strategic advantages. We outline a methodoloy for developing such information using the induced-value methodology of experimental economics. An example experiment is detailed and initial results are presented relating to one general DSS hypothesis and one implication derived from a specific theory of DSS portfolio selection.     

The role and use of the stochastic linear-quadratic-Gaussian problem in control system design

The role of the linear-quadratic stochastic control problem in engineering design is reviewed in tutorial fashion. The design approach is motivated by considering the control of a non-linear uncertain plant about a desired input-output response. It is demonstrated how a design philosophy based on 1) deterministic perturbation control, 2) stochastic state estimation, and 3) linearized stochastic control leads to an overall closed-loop control system. The emphasis of the paper is on the philosophy of the design process, the modeling issue, and the formulation of the problem; the results are given for the sake of completeness, but no proofs are included. The systematic off-line nature of the design process is stressed throughout.     

一种移动新型农村合作医疗信息系统的设计

针对目前新型农村合作医疗信息系统的不完善,提出了一种移动新型农村合作医疗信息系统的设计方案.在简单阐述了系统的整体设计方案之后,着重讨论了基于J2ME技术实现移动终端的界面交互、网络通信和XML解析等问题.     

The evaluation and selection of a computer system for interactive design

The computer system requirements for development and support of interactive c.a.d. are considered. The nature of design its implications on c.a.d. systems are discussed and possible machine configurations are outlined. Evaluation techniques and selection criteria used in the selection of a computer system for an integrated architectural design system are presented.     

Involving users in the specification of functionality using scenarios and model-based evaluation

The research investigated how input from users can be used to inform system design at an early stage. The study was conducted in the context of a smart card project in an educational organization. Scenarios of smart card system use were developed based on claims analysis. For the purpose of evaluating the scenarios, a model of system acceptance was devised. Evaluation questionnaires based on the acceptance model were developed and used by potential system users to evaluate the scenarios. Multiple regression analysis of the questionnaire responses indicated which causal links in the acceptance model were significant, and enabled the elements of system functionality likely to have an impact on acceptance to be identified. This approach enables the importance of particular system functions to be assessed at an early stage of system design.     

On the use of dynamic feedback in knowledge base system design

The problems of the physical design of knowledge base systems is discussed. A basic architecture for adding monitoring and reorganization software to knowledge base management systems is presented. This software uses dynamic feedback from the system to restructure the physical representation of data. Examples of the incorporation of monitoring and reorganization software into existing systems are given.     

A generic and customizable framework for the design of ETL scenarios

Extraction–transformation–loading (ETL) tools are pieces of software responsible for the extraction of data from several sources, their cleansing, customization and insertion into a data warehouse. In this paper, we delve into the logical design of ETL scenarios and provide a generic and customizable framework in order to support the DW designer in his task. First, we present a metamodel particularly customized for the definition of ETL activities. We follow a workflow-like approach, where the output of a certain activity can either be stored persistently or passed to a subsequent activity. Also, we employ a declarative database programming language, LDL, to define the semantics of each activity. The metamodel is generic enough to capture any possible ETL activity. Nevertheless, in the pursuit of higher reusability and flexibility, we specialize the set of our generic metamodel constructs with a palette of frequently used ETL activities, which we call templates. Moreover, in order to achieve a uniform extensibility mechanism for this library of built-ins, we have to deal with specific language issues. Therefore, we also discuss the mechanics of template instantiation to concrete activities. The design concepts that we introduce have been implemented in a tool, arktos ii, which is also presented.     

The concept of an information management system and its use within design studies

Abstract

This paper describes the concept of an information management system (IMS) and its association with a user centred approach to the design of equipment which acts as a medium for the user to attain a goal. The case is taken where such mediating devices (MDs) involve computer based processing, storage and communications arrangements, and transactions with either a physical environment or engineered facilities. Particular attention is drawn to the designer's role in defining the data transformations within an MD, and hence to information that is available to the user and the means of carrying out transactions with it. transforming it into knowledge and attaining a goal. There is also special emphasis on the usability (= operability + trainability) aspects of the user's interface with the MD. The means of exploring design options are described along with the possible assessment techniques. It is concluded that the concept of an IMS offers considerable benefits for studying a range of design issues and matters of scientific importance.     

The concept of an information management system and its use within design studies

This paper describes the concept of an information management system (IMS) and its association with a user centred approach to the design of equipment which acts as a medium for the user to attain a goal. The case is taken where such mediating devices (MDs) involve computer based processing, storage and communications arrangements, and transactions with either a physical environment or engineered facilities. Particular attention is drawn to the designer's role in defining the data transformations within an MD, and hence to information that is available to the user and the means of carrying out transactions with it. transforming it into knowledge and attaining a goal. There is also special emphasis on the usability (= operability + trainability) aspects of the user's interface with the MD. The means of exploring design options are described along with the possible assessment techniques. It is concluded that the concept of an IMS offers considerable benefits for studying a range of design issues and matters of scientific importance.     

基于JSP的绩效考核系统的设计与实现

为了激励和鞭策员工,绩效考核在一个现代企业中占据了重要地位,本文利用JSP技术设计实现了网上绩效考核系统,经验证本系统是切实可行的,得到了很好的应用。     

Autonomic system design based on the integrated use of SSM and VSM

This paper describes an approach to autonomic systems development that involves the integrated use of two general systems design techniques: Soft Systems Methodology (SSM) and the Viable System Model (VSM). The paper summarizes the relevant aspects of each technique and describes how they can be used together to create design models of an autonomic system and its environment. The discussion is illustrated through a consideration of the development of a generic computing system to help manage the technology used in an organisation.     

Involving users in the design and usability evaluation of a clinical decision support system

AIM: To design and evaluate a clinical decision support system (CDSS) to support cardiovascular risk prevention in type 2 diabetes. METHODS: A preliminary requirements specification and three prototype CDSS interface designs were developed. Seven patients and seven clinicians conducted 'usability tests' on five different task scenarios with the CDSS prototypes to test its effectiveness, efficiency and 'user-friendliness'. Structured, qualitative questions explored their preferences for the different designs and overall impressions of clinical usefulness. RESULTS: Patients and clinicians were enthusiastic about the CDSS and used it confidently after a short learning period. Some patients had difficulty interpreting clinical data, but most were keen to see the CDSS used to help them understand their diabetes, provided a clinician explained their results. Clinicians' main concern was that the CDSS would increase consultation times. Changes suggested by users were incorporated into the final interface design. CONCLUSION: We have successfully incorporated patients' and clinicians' views into the design of a CDSS, but it was an arduous process.     

The design and use of steerable filters

The authors present an efficient architecture to synthesize filters of arbitrary orientations from linear combinations of basis filters, allowing one to adaptively steer a filter to any orientation, and to determine analytically the filter output as a function of orientation. Steerable filters may be designed in quadrature pairs to allow adaptive control over phase as well as orientation. The authors show how to design and steer the filters and present examples of their use in the analysis of orientation and phase, angularly adaptive filtering, edge detection, and shape from shading. One can also build a self-similar steerable pyramid representation. The same concepts can be generalized to the design of 3-D steerable filters     

The use of computers in electron- and ion-gun design

The influence of computers on gun design is explained with three examples, an ion gun characterized by negligible space charge, a C.R.T. gun characterized by the influence of space charge and initial thermal velocities, and a gun without rotational symmetry characterized by calculation in three dimensions.