具有低相关值的新的修改的二元Jacobi序列

根据修改的二元Jacobi序列的构造方法，利用任意起点的二元Jacobi序列，构造了大量的新的二元序列。并利用kgendre特征函数的求和公式，给出了其中一类序列的自相关值及其它类序列在一定条件下的互相关值。结果表明，这类序列在一定条件下具有非常平坦的相关值分布。     

周期为p 7(mod 8)的一类新六次剩余序列的迹表示

构造了一类新的周期为素数 的六次剩余序列，利用有限域和差集理论给出了该序列在周期为素数 情形下的迹函数表示。新序列的线性复杂度为 ，优于Hall六次剩余序列在相同条件下的线性复杂度。     

经济供电半径的实用计算方法与分析

基于满足负荷要求及各项技术指标的条件下，以供电范围内单位面积所承担的总费用最小为原则，提出了东北地区６６／１０ｋＶ供电方式的１０ｋＶ配电线路经济供电半径的实用计算方法。同时分析了常规变电站和小型化变电站的合理供电半径，并给出了供电半径与负荷密度之间的函数关系。     

季节性组合预测模型在医院门诊量中的应用研究

医院门诊量是一个具有复杂的非线性组合特征的季节性时问序列。为解决传统时间序列预测大多数都是使用单一模型，以致影响预测精度等问题，采用了最优加权组合预测方法将季节性ARIMA乘积模型和季节性神经网络模型进行组合优化。结果表示，季节性组合预测模型在拟合精度和预测准确性方面优于任何单一预测方法，为季节性时间序列预测提供了一种新的实用方法。     

2000年我国钢材需求量预测

本文在国外有关钢铁需求预测方法的基础上,结合我国的实际情况,建立了适合我国特点的钢材需求量预测模型——钢材消费强度与时间序列组合模型。利用所建立的预测模型,对我国2000年各种可能条件下的钢材需求量做出了预报。     

有效挖掘闭合组合序列模式

序列模式的挖掘是近年来的研究热点之一,目前很多研究都集中在闭合频繁项集与闭合序列模式的挖掘,较少涉及更加复杂、有重要应用价值的组合序列模式.针对任意长度和任意组合次数的频繁组合序列模式,提出了一种挖掘全部闭合的组合序列的算法CloCSP.为克服指数量级的候选序列进行闭合检验的困难,提出了既能生成频繁组合序列,又能有效剪枝,并同时完成闭合检验的混合扩展策略,该策略无需维护候选集.实验表明,CloCSP算法能够有效挖掘出隐藏在序列数据中,尤其是稠密数据集内的闭合组合序列模式,有助于揭示更加复杂的序列模式.     

经典软件全新演绎——Download Accelerator Plus4.02

“ＸＸＸＸ下载中……估计剩余时间：３０分钟；下栽速度──４．５ｋ／ｓ、４．０ｋ／ｓ、３． ２ｋ／ｓ、２． ４ｋ／ｓ、１．５ ｋ／ｓ…” 我想上面的情景对已经上网的朋友来说是经常碰到的吧？说句老实话，我有时候怀疑我那娇生惯养的猫是不是晕过去了？它那１点几ｋ的速率简直就……让人无法忍受。于是我到处寻找高速度的下载工具，在试过了Ｎｅｔａｎｔｓ、Ｊｅｔｃａｒ、Ｇｅｔｒｉｇｈｔ等工具之后总觉得不怎么满意。后来终于找到了ＤｏｗｎｌｏａｄＡｃｃｅｌｅｒａｔｏｒ Ｐｌｕｓ，最新的版本是４． ０２，在它的说明文字中居然…     

Windows环境下的Socket编程技术

本文分析了Ｗｉｎｄｏｗｓ环境下应用Ｗｉｎｓｏｃｋ实现网络通信的机制，介绍了应用Ｗｉｎｓｏｃｋ调用通信协议栈的方法及网络编程技巧，并对Ｗｉｎｓｏｃｋ程序编写中的阻塞与非阻塞、同步与异步等问题进行了讨论。     

WINSOCK软件及其应用

ＷｉｎＳｏｃｋ是Ｍｉｃｒｏｓｏｆｔ Ｗｉｎｄｏｗｓ环境下的标准ＴＣＰ／ＩＰ网络开发环境，是Ｉｎｔｅｒｎｅｔ／ＷＷＷ用户必然要涉及的重要ｃｌｉｅｎｔ软件。本文介绍了ＷｉｎＳｏｃｋ的基本概念和环境需求，详细介绍了ＷｉｎＳｏｃｋ之安装与执行步骤，以及常见的ＷｉｎＳｏｃｋ应用系统和设置。     

基于数据挖掘的水文时间序列预测

基于灰色理论和灰色神经网络组合预测模型,对水文时间序列进行数据挖掘。对原始序列首先进行了对数-方根变换,使得数据序列满足灰色理论的覆盖条件,采用灰色预测模型GM（1,1）,对数据序列进行预测,由于灰色预测属于线性预测,因此将灰色预测模型与神经网络模型相结合,提高了预测精度。以都江堰岷江来水数据为原始数据进行实际预测,实验证明,这种组合模型的预测效果优于传统预测模型。     

Only connect: teaching, technology and telesis

Abstract This paper describes an approach to the design of interactive multimedia materials being developed in a European Community project. The developmental process is seen as a dialogue between technologists and teachers. This dialogue is often problematic because of the differences in training, experience and culture between them. Conditions needed for fruitful dialogue are described and the generic model for learning design used in the project is explained.     

European Community policy and the market

Abstract This paper starts with some reflections on the policy considerations and priorities which are shaping European Commission (EC) research programmes. Then it attempts to position the current projects which seek to capitalise on information and communications technologies for learning in relation to these priorities and the apparent realities of the marketplace. It concludes that while there are grounds to be optimistic about the contribution EC programmes can make to the efficiency and standard of education and training, they are still too technology driven.     

一种自适应子融合集成多分类器方法

融合集成方法已经广泛应用在模式识别领域,然而一些基分类器实时性能稳定性较差,导致多分类器融合性能差,针对上述问题本文提出了一种新的基于多分类器的子融合集成分类器系统。该方法考虑在度量层融合层次之上通过对各类基多分类器进行动态选择,票数最多的类别作为融合系统中对特征向量识别的类别,构成一种新的自适应子融合集成分类器方法。实验表明,该方法比传统的分类器以及分类融合方法识别准确率明显更高,具有更好的鲁棒性。     

煤矿井下安全监控分站的设计及其仿真实现

为了设计一种具有低成本、低功耗、易操作、功能强且可靠性高的煤矿井下安全分站,针对煤矿安全生产实际,文章提出了采用MCS-51系列单片机为核心、具有CAN总线通信接口的煤矿井下安全监控分站的设计方案;首先给出煤矿井下安全监控分站的整体构架设计,然后着重阐述模拟量输入信号处理系统的设计过程,最后说明单片机最小系统及其键盘、显示、报警、通信等各个组成部分的设计;为验证设计方案的可行性与有效性,使用Proteus软件对设计内容进行仿真验证,设计的煤矿井下安全监控分站具有瓦斯、温度等模拟量参数超标报警功能和电机开停、风门开闭等开关量指示功能;仿真结果表明:设计的煤矿井下安全监控分站具有一定的实际应用价值.     

Avoiding semantic and temporal gaps in developing software intensive systems

Development of software intensive systems (systems) in practice involves a series of self-contained phases for the lifecycle of a system. Semantic and temporal gaps, which occur among phases and among developer disciplines within and across phases, hinder the ongoing development of a system because of the interdependencies among phases and among disciplines. Such gaps are magnified among systems that are developed at different times by different development teams, which may limit reuse of artifacts of systems development and interoperability among the systems. This article discusses such gaps and a systems development process for avoiding them.     

Designing economic np control charts: A programmed simulation approach

This paper presents control charts models and the necessary simulation software for the location of economic values of the control parameters. The simulation program is written in FORTRAN, requires only 10K of main storage, and can run on most mini and micro computers. Two models are presented - one describes the process when it is operating at full capacity and the other when the process is operating under capacity. The models allow the product quality to deteriorate to a further level before an existing out-of-control state is detected, and they can also be used in situations where no prior knowledge exists of the out-of-control causes and the resulting proportion defectives.     

The development of robot art

Going through a few examples of robot artists who are recognized worldwide, we try to analyze the deepest meaning of what is called “robot art” and the related art field definition. We also try to highlight its well-marked borders, such as kinetic sculptures, kinetic art, cyber art, and cyberpunk. A brief excursion into the importance of the context, the message, and its semiotics is also provided, case by case, together with a few hints on the history of this discipline in the light of an artistic perspective. Therefore, the aim of this article is to try to summarize the main characteristics that might classify robot art as a unique and innovative discipline, and to track down some of the principles by which a robotic artifact can or cannot be considered an art piece in terms of social, cultural, and strictly artistic interest. This work was presented in part at the 13th International Symposium on Artificial Life and Robotics, Oita, Japan, January 31–February 2, 2008     

View-based model-driven architecture for enhancing maintainability of data access services

In modern service-oriented architectures, database access is done by a special type of services, the so-called data access services (DAS). Though, particularly in data-intensive applications, using and developing DAS are very common today, the link between the DAS and their implementation, e.g. a layer of data access objects (DAOs) encapsulating the database queries, still is not sufficiently elaborated, yet. As a result, as the number of DAS grows, finding the desired DAS for reuse and/or associated documentation can become an impossible task. In this paper we focus on bridging this gap between the DAS and their implementation by presenting a view-based, model-driven data access architecture (VMDA) managing models of the DAS, DAOs and database queries in a queryable manner. Our models support tailored views of different stakeholders and are scalable with all types of DAS implementations. In this paper we show that our view-based and model driven architecture approach can enhance software development productivity and maintainability by improving DAS documentation. Moreover, our VMDA opens a wide range of applications such as evaluating DAS usage for DAS performance optimization. Furthermore, we provide tool support and illustrate the applicability of our VMDA in a large-scale case study. Finally, we quantitatively prove that our approach performs with acceptable response times.     

Explanation and prediction: an architecture for default and abductive reasoning

Although there are many arguments that logic is an appropriate tool for artificial intelligence, there has been a perceived problem with the monotonicity of classical logic. This paper elaborates on the idea that reasoning should be viewed as theory formation where logic tells us the consequences of our assumptions. The two activities of predicting what is expected to be true and explaining observations are considered in a simple theory formation framework. Properties of each activity are discussed, along with a number of proposals as to what should be predicted or accepted as reasonable explanations. An architecture is proposed to combine explanation and prediction into one coherent framework. Algorithms used to implement the system as well as examples from a running implementation are given.     

A pragmatic multi-method investigation of discrepant technological events: Coping,attributions, and ‘accidental’ learning

Discrepant technological events or situations that entail a problem, a misunderstanding or a difficulty with the Information Technology (IT) being employed, are common in the workplace, and can lead to frustration and avoidance behaviors. Little is known, however, about how individuals cope with these events. This paper examines these events by using a multi-method pragmatic approach informed by coping theory. The results of two studies – a critical incident study and an experiment – serve to build and test, respectively, a theoretical model that posits that individuals use a variety of strategies when dealing with these events: they experience negative emotions, make external attributions, and adopt engagement coping strategies directed at solving the event, eventually switching to a disengagement coping strategy when they feel they have no control over the situation. Furthermore, users’ efforts may result in ‘accidental’ learning as they try to overcome the discrepant IT events through engagement coping. The paper ends with a discussion of the results in light of existing literature, future opportunities for research, and implications for practice.