基于软件定义网络的WLAN架构及负载均衡切换

软件定义网络将控制平面与数据转发平面进行分离，并提供开放的编程接口，实现网络的可编程化控制，极大地提高了网络管理的灵活性。在传统无线局域网中，终端通常依据信号强度选择接入点，这一机制往往会造成网络资源利用率低及接入点负载不均衡的问题。提出基于软件定义网络技术的无线局域网架构及一种负载均衡切换策略，利用控制器的全局视角与集中管控能力实现对接入点的实时监测，分析其状态信息并计算权值，由控制器根据负载情况向接入点下发流表，完成对网络的管理。硬件和计算机仿真平台实验表明，与传统的无线局域网架构相比，该方案有效提高了网络的资源利用率，平衡了接入点的负载，降低了数据在终端切换过程中的传输时延，提高了网络的性能。     

大数据时代软件产品个人信息安全认证机制构建

软件产业的开发、生产、销售各个环节都对于用户个人信息保护与安全至关重要.在借鉴美国的隐私认证制度、日本的个人信息评价制度以及我国大连软件及信息服务业个人信息评价制度的基础上,提出从宏观深入到微观、从表面深入到实质、从产业深入到产品,将个人信息认证制度推广到软件产业链的末梢,全面加强软件行业的自律,切实保障广大用户的权益,增强用户对于软件产品的信心,并对该制度的构建着重从软件产品个人信息保护认证标准和软件产品个人信息保护认证流程两个方面进行了探讨.     

Optimal Enhancement and Lifetime of Software Systems: A Control Theoretic Analysis

We develop an optimal control model to maximize the net value provided by a software system over its useful life. The model determines the initial number of features in the system, the level of dynamic enhancement effort, and the lifetime of the system. The various factors affecting these optimal choices are systems characteristics (e.g., complexity, age, quality), user learning, and process maturity. We also consider that there is a time lag between the addition of a feature and the realization of its benefit to users. The basic model is extended to consider the decision of replacing the existing system by a new one.     

纸浆生产过程SU6PC与80C196单片机综合控制系统研究

通过对造纸纸浆生产过程的深入研究,提出了由SU6PC可编程控制器和80C196单片机组成的造纸纸浆生产过程综合控制系统,介绍了以草料造纸的纸浆生产过程自动综合控制方法.简要介绍了系统硬件和软件设计.     

软件开发中的测试技术

在分析了软件测试重要性的基础上 ,提出了软件测试的五大原则 ,指出软件测试的内容和步骤应基于软件生命周期的全过程 ,并就测试方法、测试策略的合理选择进行了阐述。通过对测试时间、测试成本和可靠度的关系的分析 ,给出了软件最佳测试时间的确定方法 ,并对测试工作的可靠性评价进行了探讨     

自由软件正当性的理由及其启示

限制软件的自由会导致许多负面影响,而倡导自由软件并不会导致没人愿意开发软件,也并不必然导致软件开发的效率和质量降低.自由软件运动提醒我们对知识产权法立法目的的关注,即促进社会公共利益的发展,而促进社会公共利益的发展并非当然地是向知识产权人提供尽可能大的人为激励才能实现.软件自身的特点促使我们在通过版权制度对其加以保护时应更加谨慎.     

国内核电公众沟通研究热点及发展趋势——基于CiteSpace的知识图谱分析

文章以中国学术期刊网络出版总库(CNKI)2000—2021年发表的396篇核电公众沟通相关文献为基础,运用CiteSpace5.7R1软件,进行发文量统计、合作共现、关键词聚类、突现词探测等分析,揭示出国内核电公众沟通研究主要聚焦核电政策宣贯与技术知识普及、核电公众沟通与接受机理两大主题,沟通重心由“核事故处置”向“核应急预防”转变,沟通思路由“单向宣传”向“双向互动”转变并朝“构建核安全共同体”迈进。同时发现,国内核电公众沟通研究仍属小众领域,与我国从核大国迈向核强国的现实需求不相称,亟待更多学者广泛参与,推动学科交叉融合,增强研究系统性,提升学术影响力。     

The Design of Feature‐Limited Demonstration Software: Choosing the Right Features to Include

Today, software supports many important tasks in a variety of industries. In the specialized nature of these environments, a common problem faced by software vendors is to correctly signal the true value of a software product to the end users. For example, telecommunications equipment manufacturers design complex software for important functions like provisioning new users in the network. These software products automate various functions that would otherwise need to be done manually. In order to enable potential customers—telecommunications providers—to evaluate and recognize the full value of the product, equipment vendors often provide a free, feature‐limited version of the product to the customer. As the specific features included in the feature‐limited version influence whether the full product is purchased or not, it is essential that the features included in the feature‐limited version be selected judiciously. While the importance of identifying the best set of features has been well recognized, there has been little research to date that systematically addresses this fundamental business decision. This study fills this gap in the literature by providing an objective approach to the design of demonstration software. We illustrate the benefits of our approach through a case study involving the design of a feature‐limited demo for a wireless telecommunications equipment manufacturer.     

运用Camcorder配合PowerPoint制作多媒体教学软件

介绍MSOffice97软件包中常被忽视却又十分实用的软件Camcorder,并提出运用Camcorder配合PowerPoint制作多媒体教学软件的设想和实现方案