从《国家网络安全事件应急预案》看我国网络安全事件应急体系

2020年伊始,新型冠状病毒肺炎疫情突然暴发,并在全球范围流行.多个国家的APT攻击组织都发起了以新冠疫情为诱饵主题的高级威胁攻击.互联网在我国新冠肺炎疫情防控方面发挥了积极的支撑作用.但随之而来的网络攻击、安全漏洞、数据泄露、网络诈骗、勒索病毒等网络安全风险威胁日益凸显,为我国网络安全防护工作带来巨大压力.网络安全应...     

5G+区块链迎接数字时代的奇点

2020年注定是不平凡的一年,突如其来的新冠肺炎疫情对几乎所有行业造成了冲击,也倒逼全球经济进入了一个新的周期—数字经济时代.5G与区块链的融合将为数字经济发展带来"新变量",也在为我们铺就通往新世界的快车道—价值互联网.5G之于区块链,就像是"加速器";区块链之于5 G,就像是"防弹衣".而作为区块链和5G融合发展的...     

新冠肺炎疫情大数据可视化平台设计与实现

介绍了新冠肺炎疫情大数据可视化平台的搭建:以大量的新冠肺炎疫情数据为基础,借助Echarts技术以及交互组件,通过可视化图形与地图集成的方式对疫情数据进行可视化展示.实现从多个角度展示国内疫情发展趋势,丰富了疫情数据的展示内容,为广大人民群众了解新冠肺炎疫情提供了便利.     

数字经济发展与打造超强规模市场的底层逻辑和思考

2020年全球政治、经济、社会发展进程印证了世界面临“百年未有之大变局”的精准论述.一方面,新冠肺炎疫情的爆发给全球经济秩序和治理结构带来巨大挑战,另一方面,贸易保护主义抬头、逆全球化趋势升温、国际跨境投资锐减、全球产业链供应链调整加速. 面对着严峻复杂的外部环境叠加中国经济行稳致远的发展目标,为积极适应内外部环境变化...     

新冠肺炎传播动力学建模及预测

为了深入研究新冠肺炎传播趋势和传播风险,根据新冠肺炎的传播特点,考虑政府管控和个人防护等措施,在经典传染病SIR模型的基础上,引入低风险群体,提出一种新冠肺炎传播动力学模型SLIR,并对模型的平衡点、稳定性和分岔等复杂动力学行为进行分析,揭示新冠肺炎传播机理.为了提高该模型的疫情预测精度,以美国新冠肺炎的真实数据为基础,使用最小二乘法对模型参数进行分段估计.最后利用该模型对美国新冠肺炎进行预测和分析,仿真结果表明,相比于传统SIR模型,该模型能较好地对美国疫情发展趋势做出预测,官方公布的实际数据也可进一步验证模型的有效性. SLIR模型可以有效仿真新冠肺炎传播,并为政府选择合适的防控措施提供技术支撑.     

新冠肺炎疫情下的本科线上教学方案与实践

新冠肺炎疫情使得全国高校开展了大规模的线上教学活动。该文阐述了在疫情形势下开展线上教学的方案与实践。     

AI破疫:依图捕捉蛛丝马迹

疫情期间,人工智能在众多场景中实现了落地应用。其中,依图医疗围绕新冠肺炎打造的智能评价系统,可以辅助医生分析疑似患者的CT影像,进而做出初步诊断。此外,依图医疗推出的小依医生、区域传染病智能防控解决方案同样为疫情防控提供了科技支撑。国内新型冠状病毒感染的肺炎(以下简称新冠肺炎)疫情爆发后,收治患者成为头等大事,尤其对于武汉市而言,提高收治能力迫在眉睫。     

基于区块链的传染病风险管理方案

为控制疫情传播,传统的传染病风险管理方案大多采用中心化的管理模式,该模式存在着隐私信息易泄露、数据易被篡改、信息难以有效利用等问题.随着区块链技术的发展,其去中心化、防篡改、可追溯的特性为解决上述问题提供了新的思路.基于区块链技术,提出一种安全、高效的传染病风险管理方案.方案利用隐私集合计算对数据进行处理,并利用区块链...     

Logistic回归模型对美国新冠疫情预测研究

为了预测美国新冠肺炎疫情变化趋势并探索其背后的深层原因,以便为我国制订针对性政策提供借鉴,本文采用Logistic回归方法对美国新冠肺炎确诊人数建立预测模型,通过实际数值进行拟合预测分析。计算结果表明,在新冠肺炎疫情发作的前中期,Logistic模型拟合预测的情况与实际数据基本吻合,具有较高的预测精度,可用于新冠肺炎感染确诊人数的初期预测,这对我国新冠肺炎感染者人数预测具有借鉴意义。     

以先进制造业集群为抓手,服务构建新发展格局

先进制造业集群是服务构建新发展格局的重要抓手 产业链垂直分工环节趋于缩短、水平分工加速区域化布局,先进制造业集群成为产业发展的重要载体.新冠肺炎疫情和中美经贸摩擦促使各大经济体普遍认识到,产业链任何环节的断裂都可能给经济发展带来巨大冲击,追求产业及产业链安全可控已成为一项战略选择.集群作为产业集聚发展和分工深化的组织网络,在可控的空间区域内集聚了较完善的产业链、供应链和与之配套的创新链、人才链,既保证了专业化分工带来的全球经济利益,也确保了产业链、供应链安全,是维持上述平衡的最优解之一.     

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。     

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     

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.     

Three Process Perspectives: Organizations, Teams, and People

This paper provides the author's personal views and perspectives on software process improvement. Starting with his first work on technology assessment in IBM over 20 years ago, Watts Humphrey describes the process improvement work he has been directly involved in. This includes the development of the early process assessment methods, the original design of the CMM, and the introduction of the Personal Software Process (PSP)^SM and Team Software Process (TSP){^SM}. In addition to describing the original motivation for this work, the author also reviews many of the problems he and his associates encountered and why they solved them the way they did. He also comments on the outstanding issues and likely directions for future work. Finally, this work has built on the experiences and contributions of many people. Mr. Humphrey only describes work that he was personally involved in and he names many of the key contributors. However, so many people have been involved in this work that a full list of the important participants would be impractical.     

基于复小波噪声方差显著修正的SAR图像去噪

提出了一种基于复小波域统计建模与噪声方差估计显著性修正相结合的合成孔径雷达(Synthetic Aperture Radar,SAR)图像斑点噪声滤波方法。该方法首先通过对数变换将乘性噪声模型转化为加性噪声模型,然后对变换后的图像进行双树复小波变换(Dualtree Complex Wavelet Transform,DCWT),并对复数小波系数的统计分布进行建模。在此先验分布的基础上,通过运用贝叶斯估计方法从含噪系数中恢复原始系数,达到滤除噪声的目的。实验结果表明该方法在去除噪声的同时保留了图像的细节信息,取得了很好的降噪效果。     

How do children do mathematics with LOGO?

Abstract  This paper considers some results of a study designed to investigate the kinds of mathematical activity undertaken by children (aged between 8 and 11) as they learned to program in LOGO. A model of learning modes is proposed, which attempts to describe the ways in which children used and acquired understanding of the programming/mathematical concepts involved. The remainder of the paper is concerned with discussing the validity and limitations of the model, and its implications for further research and curriculum development.