用VB构建INTERNET的应用

发展Intemet技术为编程人员提供了更广泛的施展身手的空间.早先"Intemet应用程序"这个词只是指一些用FTP协议下载文件或浏览HTML页面的工具,如今使用Visual Basic,不仅可为Internet开发应用程序,还可把Internet技术作为一部分融入大型的解决方案中.     

基于Visual Basic.net软件开发风电机组监控系统人机界面

提出并研究了一种以Visual Basic.net编程软件为平台,与PLC控制器建立通讯连接以开发风力发电机组监控系统人机界面软件的实现方法,充分利用了Visual Basic.net的强大的可视性功能。研究应用表明,Visual Basic.net编程软件平台为风机人机界面软件的开发提供了有效的新途径。     

基于OpenGL的三维地形可视化原理与实现

OpenGL是当今业界最为广泛使用的三维图形技术标准.本文以模拟三维地形数据为基础,针对地理信息区域的三维地形可视化,探讨了在Visual Basic环境下实现三维地形的模拟以及三维可视化的原理和方法,并给出了部分相关的实现代码.     

多媒体计算机房综合控制系统设计与实现

基于VB和单片机设计实现了多媒体计算机房综合控制系统。该系统可控制学生机的批量开启、关闭和重启,可发送即时短消息并支持通过遥控器演示PPT课件。该系统使用简便,响应迅速,既能帮助管理员完成繁复的工作,提高机房的管理效率和水平,又能帮助教师充分利用多媒体教学资源开展教学活动,提升教学效果。     

Fitting Unstructured Finite Mixture Models in Longitudinal Design: A Recommendation for Model Selection and Estimation of the Number of Classes

In longitudinal design, investigating interindividual differences of intraindividual changes enables researchers to better understand the potential variety of development and growth. Although latent growth curve mixture models have been widely used, unstructured finite mixture models (uFMMs) are also useful as a preliminary tool and are expected to be more robust in identifying classes under the influence of possible model misspecifications, which are very common in actual practice. In this study, large-scale simulations were performed in which various normal uFMMs and nonnormal uFMMs were fit to evaluate their utility and the performance of each model selection procedure for estimating the number of classes in longitudinal designs. Results show that normal uFMMs assuming invariance of variance–covariance structures among classes perform better on average. Among model selection procedures, the Calinski–Harabasz statistic, which has a nonparametric nature, performed better on average than information criteria, including the Bayesian information criterion.     

The Saljuq Turks’ Conversion to Islam: The Crusading Sources

This article contributes to the important debate over the conversion of the Turks to Islam. Previously, it was thought that the Turks abandoned their former steppe faith and customs very swiftly to become staunch Sunni Muslims, but this view has recently been challenged by a number of studies. The current consensus seems to be that the Turks’ adoption of Islam was a process of far longer duration, spanning many decades. This article broadens this discussion by demonstrating that the chronicles written by the First Crusaders contain much useful information that is pertinent to this question. It works through these texts, showing that they can shed new light on this point.     

The “Other” in the Crusading Period: Walter the Chancellor's Presentation of Najm al-Dīn Il-Ghāzī

This paper examines ideas surrounding the presentation of the Muslim “other” in Latin writings of the early period of the Crusades. Using a case-study approach of the views of one chronicler, Walter the Chancellor, in his work Bella Antiochena, on one individual Muslim, Najm al-Dīn Il-Ghāzī, the paper studies aspects of the image of Il-Ghāzī, the reasons for them, how and why they develop throughout the chronicle, and whether, from the other information given in the chronicle, it would be possible to interpret the information in other ways. The conclusions reached demonstrate that the reason for the vitriol in Walter's presentation was his wish to justify the Crusades and suggest that the writers of Outremer started to develop their own cross-cultural responses to Islam, independent of mainstream European thought, because of their situation.     

Influence of upright versus time trial cycling position on determination of critical power and W′ in trained cyclists

Body position is known to alter power production and affect cycling performance. The aim of this study was to compare mechanical power output in two riding positions, and to calculate the effects on critical power (CP) and W′ estimates. Seven trained cyclists completed three peak power output efforts and three fixed-duration trial (3-, 5- and 12-min) riding with their hands on the brake lever hoods (BLH), or in a time trial position (TTP). A repeated-measures analysis of variance showed that mean power output during the 5-min trial was significantly different between BLH and TTP positions, resulting in a significantly lower estimate of CP, but not W′, for the TTP trial. In addition, TTP decreased the performance during each trial and increased the percentage difference between BLH and TTP with greater trial duration. There were no differences in pedal cadence or heart rate during the 3-min trial; however, TTP results for the 12-min trial showed a significant fall in pedal cadence and a significant rise in heart rate. The findings suggest that cycling position affects power output and influences consequent CP values. Therefore, cyclists and coaches should consider the cycling position used when calculating CP.     

Thomas Tryon,Sheep and the Politics of Eden

The English writer Thomas Tryon (1634–1703) believed that sheep were survivors from the original earthly paradise, and that as morally perfect beings they could serve as role models for humans. Tryon advocated vegetarianism, pacifism and an end to slavery as it was practiced in the Caribbean. He was an ambitious and influential reformer on several fronts, but the restoration of Eden was his ultimate goal. Tryon celebrated sheep-like meekness, a stance that complicated his reform efforts. His agenda and sheep-inspired persuasive strategy reflect the momentous intellectual and moral ferment surrounding human relations with animals in the seventeenth century.     

Heritage sporting events: theoretical development and configurations

ABSTRACT

Although sports heritage is increasingly recognized as a potential catalyst of tourism, heritage sporting events (HSEs) are still an emerging concept in the academic literature. Notions that associate sports events and heritage remain rare, and are usually analysed through the scope of nostalgia sport tourism. This can be partly explained by an inclination to associate the notion of heritage with conventional ideas about folklore and traditional culture. Through a constructivist approach of heritage, this contribution argues that contemporary sports events, which would generally have competition as their primary focus, might also be perceived as HSEs. A comprehensive framework, built on a multi-disciplinary literature review, is presented to show the process that transforms an initial resource (a sports event) into an accomplished resource (a HSE), which might represent a competitive advantage for the territory. A qualitative–comparative analysis is conducted among 24 sports events in the French-speaking part of Switzerland, to observe the configurations of HSEs and understand which characteristics are necessary for the perceptions of a sports event as a heritage good. Interestingly, this contribution shows that if the event needs to be sustainable in the territory to be perceived as a HSE, it is not sufficient. Indeed, a differentiation strategy should be set up to distinguish the event from other more or less similar events, to be perceived as an authentic feature of the territory by the local population.