构建企业VOIP的关键技术

介绍了基于网络上的VOIP电话的关键技术。要保证VOIP电话的语音质量,一是选用语音网关及适当的网守控制方式,二是提高IP网络的服务质量(QoS),使网络时延、时延抖动及包丢失率控制在一定限度以内。     

Trust or mistrust in algorithmic grading? An embedded agency perspective

Artificial Intelligence (AI) has the potential to significantly impact the educational sector. One application of AI that has increasingly been applied is algorithmic grading. It is within this context that our study takes a focus on trust. While the concept of trust continues to grow in importance among AI researchers and practitioners, an investigation of trust/mistrust in algorithmic grading across multiple levels of analysis has so far been under-researched. In this paper, we argue the need for a model that encompasses the multi-layered nature of trust/mistrust in AI. Drawing on an embedded agency perspective, a model is devised that examines top-down and bottom-up forces that can influence trust/mistrust in algorithmic grading. We illustrate how the model can be applied by drawing on the case of the International Baccalaureate (IB) program in 2020, whereby an algorithm was used to determine student grades. This paper contributes to the AI-trust literature by providing a fresh theoretical lens based on institutional theory to investigate the dynamic and multi-faceted nature of trust/mistrust in algorithmic grading—an area that has seldom been explored, both theoretically and empirically. The study raises important implications for algorithmic design and awareness. Algorithms need to be designed in a transparent, fair, and ultimately a trustworthy manner. While an algorithm typically operates like a black box, whereby the underlying mechanisms are not apparent to those impacted by it, the purpose and an understanding of how the algorithm works should be communicated upfront and in a timely manner.     

数据素养的渐进式嵌入服务模式研究

针对数据素养发展面临的主流问题,文章以嵌入式理念为基础,研究大学图书馆数据素养服务的新型发展路径。文章创新性地设计了渐进式的嵌入方式,从嵌入认知、嵌入能力、嵌入空间三个方面构建了数据素养的嵌入式服务框架并分析了相关要素。服务模式的研究意在有效指导泛在数据环境下大学图书馆数据素养服务的实施,为大学图书馆在数据素养服务上的发展转型提供参考。     

安全电子支付系统的设计与实现

近年来,随着信息技术的巨大发展和Internet的广泛应用,电子商务以其低成本、高效率的特点,逐渐取代传统的商务方式,成为新兴的商务模式和理念,走进人们的生活。由于电子商务基于开放的Internet,不可避免地会受到各种各样的攻击和安全威胁,严重限制了电子商务的发展。基于支付系统的总体设计,重点阐述了其中关键功能模块的实现,包括支付网关模块、安全模块、证书认证中心模块。实际测试结果表明,安全电子支付系统除具备应有的基本功能外,在安全性方面得到了很大的提高,较好地保证了电子支付的安全性和扩展性。     

基于VOIP技术的井下语音接入系统

本文以作者单位一个在研项目为例,设计一个适用于煤矿井上/下语音接入业务的应用产品,并提出相应的解决方案。     

QNX实时操作系统及其应用分析

对QNX实时操作系统的发展历程、主要特点、最新技术和应用领域进行了概括性描述,对于QNX嵌入式用户界面和QNX多媒体解决方案等最新应用进行了分析。     

基于ARM平台的引导程序分析与移植研究

以S3C2440处理器和嵌入式Linux为平台,对嵌入式系统中的引导程序vivi进行分析和移植研究,总结了vivi在S3C2440A处理器上的移植方法和步骤,通过了具体测试,取得了较好效果。     

提高军用嵌入式软件可靠性方法研究

在阐述了军用嵌入式软件定义及可靠性内涵的基础上,分析了影响军用嵌入式软件可靠性因素,介绍了4种提高军用嵌入式软件方法的应用。     

SoC设计中基于Linux协同验证的研究和实现

对于在SoC设计中大量定制的硬件,需要定制的软件来提供专用的诊断、初始化以及设备驱动程序。因此在整个SoC设计流程中最为关键步骤即硬件与软件整合阶段,提出了基于Linux嵌入式操作系统的验证问题,目的是验证在整个系统环境下硬件的可操作性和软硬件之间的交互问题。