共查询到20条相似文献，搜索用时 62 毫秒
1.
ARP欺骗防御解决方案 总被引：1，自引：0，他引：1
通过介绍ARP协议与ARP欺骗原理,ARP欺骗的几种类型,分析比较目前常见的几种防范ARP欺骗的解决方案及其存在的不足之处,提出了采用三重立体ARP防御解决方案,即网关防御、客户端防御和交换机非法报文过滤,详细介绍了三重立体ARP防御解决方案的原理、实现过程及其效果。 相似文献
2.
人脸识别技术的社会风险及其法律规制 《科学学研究》2021,39(1):12-20
人脸识别技术是以人工智能算法为技术支持，以大数据分析为手段，进而实现人脸识别的目的。根据算法的不同，有基于2D识别算法和3D识别算法的人脸识别技术系统。但不管基于何种算法，均面临欺骗攻击、技术利维坦及责任风险等社会风险。欺骗攻击包括2D欺骗攻击和3D欺骗攻击；人脸识别技术利维坦是集人工智能“赛维坦”和大数据“数字利维坦”于一身的复合型技术利维坦；责任风险表现为现有的过错责任原则无法有效地对人脸识别技术带来的责任规则进行划分。为防范人脸识别技术的社会风险，除需对该技术进行深度研发外，更需要从该技术系统的应用端出发，对该技术使用的范围、手段和目的进行规制。 相似文献
3.
设计新型智能信号源,应用计算机人机控制、DDS信号发生器、微处理器、D/A以及A/D转换器等,根据自动应答或数字储频原理,实现信号源信号的自动输出,提升信号源设计的智能性,满足时代发展需求。以下本篇研究基于新型智能信号源的设计问题,并给出具体设计策略。 相似文献
4.
在介绍ARP欺骗攻击原理的基础上,对ARP协议的缺陷进行分析,总结目前常见的ARP欺骗攻击威胁,并简要阐述了已有的几种常用防御ARP欺骗攻击的方法。 相似文献
5.
随着数字中国在我国的迅速发展和应用,各地都政府也对数字城市,数字区域等大力投入,因为借助3S技术建立的数字城市可以用于提高城市设计和规划管理水平,还可在城市建设、经营管理等方面提供多层次的服务。本文就是基于这一思路对3S技术及其在数字城市的应用进行了论述和分析。 相似文献
6.
浅谈超声波传感器非接触式距离检测系统 总被引：1，自引：0，他引：1
介绍了利用超声波传感器实现的非接触式距离检测系统。该系统可以用于制药设备的液位和物位的非接触式测量。介绍了超声波传感器原理及系统各单元的设计。系统采用了AT89C51型单片机作为主控制器,单片机发出的超声波,通过换能器发射出去,遇到被测物体后反射回来,计算此超声波从发射出到接收的时间差从而得出被测物体到测距仪的距离。利用单片机设定距离值和输出控制信号。最终距离用串行的方法在数码管上显示出来,可以直观地查看距离值,以实现测距、显示、输出控制信号的功能。并介绍了其硬件设计与软件流程。 相似文献
7.
多波地震采集技术作为一种新技术、新方法,越来越受到勘探的重视。而多波地震采集工作的质量在很大程度上取决于数字三分量检波器的技术性能。文章就Vectorseis和Dsu3三分量检波器的基本结构、原理进行了介绍,分析了VectorSeis和Dsu3检波器的抗电磁干扰的能力,介绍了其主要的性能与技术指标,给出了与普通检波器性能技术指标的对比分析。 相似文献
8.
介绍了一种危害图书馆网络安全的攻击——ARP欺骗。主要论述了ARP欺骗的特征、原理和防范ARP欺骗的方法。 相似文献
9.
文章首先说明了数据通信的构成原理,介绍了数据通信的交换方式和主要的数据通信技术,如:数字数据网(DDN),ATM技术和IP技术,并分析了提高数据通信质量若干方法,最后点明了发展前景. 相似文献
10.
介绍ADSL（非对称数字用户环路）的原理、了解认识ADSL,对其故障的分类、分析、怎样查找、定位,的参考作用。技术特点和业务功能。并与其它常见的接入技术比较,能更好的并通过对ADSL常见的故障错误报告的处理,提供分析排除故障的参考作用。 相似文献
11.
A research group led by Prof. ZHAI Qiwei from the Institute for Nutritional Sciences under the CAS Shanghai Institutes for Biological Sciences has discovered that even relatively low doses of resveratrol-a chemical found in the skins of red grapes in red wine-can improve the sensitivity of mice to the hormone insulin according to a report in the October issue of Cell Metabolism.…… 《中国科学院院刊(英文版)》2008,22(1):14-15
Aresearch group led by Prof. ZHAI Qiwei from the Institute for Nutritional Sciences under the CAS Shanghai Institutes for Biological Sciences has discovered that even relatively low doses of resveratrol--a chemical found in the skins of red grapes and in red wine--can improve the sensitivity of mice to the hormone insulin, according to a report in the October,2007 issue of Cell Metabolism. As insulin resistance is often characterized as the most critical factor contributing to the development of Type 2 diabetes, the findings“provide a potential new therapeutic approach for preventing or treating” both conditions, the researchers said. 相似文献
12.
《中国科学院院刊(英文版)》2008,22(1):2-3
CAS should stick to the principle of rendering service to, and giving impetus for, the development of China＇s science enterprise by making S＆T innovations, said CAS President LU Yongxiang. The CAS president made the remarks in a recent talk to communicate the gist of the winter session of the Party＇s Leading-member Group at CAS, which was held from 7 to 11 January in Beijing. 相似文献
13.
Marjorie Armstrong-Stassen Margaret Landstrom Ramona Lumpkin 《The Information Society》1998,14(2):153-164
This study examined how students who had no prior experience with videoconferencing would react to the use of videoconferencing as an instructional medium. Students enrolled in seven different courses completed a questionnaire at the beginning of the semester and again at the end of the semester. Students at the origination and remote sites did not differ in their reactions toward videoconferencing but there was a significant difference for gender. Women reacted less favorably to videoconferencing. Compared to the beginning of the semester, students reported significantly less positive attitudes toward taking a course through videoconferencing at the end of the semester. There were no significant differences in students' attitudes toward videoconferencing across courses at the beginning of the semester but there were significant differences across the courses at the end of the semester. The results suggest the need for better preparation for both students and instructors. 相似文献
14.
《中国科学院院刊(英文版)》2008,22(1)
With great care, Dr. ZHOU Zhonghe takes out a package wrapped by cotton tissue from a drawer and says: "This is the gem of our collections: the fossil of a bird that lived 125 million years ago!" Then, pointing at a tiny mound, he explains: "Look, this is the claw and that is the head. It was in the egg shell and ready to hatch ... The species fell into a family of waterside inhabitants." 相似文献
15.
A joint study by Prof. ZHANG Zhibin from the CAS Institute of Zoology his co-workers from Norway US Swiss have indicated that historical outbreaks of migratory locusts in China were associated with cold spells suggesting that China's projected climate warming could decrease the pest's numbers. The study was published in Proceedings of the National Academy of Sciences on September .…… 《中国科学院院刊(英文版)》2008,22(1):6-7
Ajoint study by Prof. ZHANG Zhibin from the CAS Institute of Zoology and his co-workers from Norway, US and Swiss have indicated that historical outbreaks of migratory locusts in China were associated with cold spells, suggesting that China＇s projected climate warming could decrease the pest＇s numbers. The study was published in Proceedings of theNational Academy of Sciences on 17 September, 2007. 相似文献
16.
Active biological molecules functional structures can be fabricated into a bio-mimetic system by using molecular assembly method. Such materials can be used for the drug delivery disease diagnosis therapy new nanodevice construction.…… 《中国科学院院刊(英文版)》2008,22(1):22-22
Active biological molecules and functional structures can be fabricated into a bio-mimetic system by using molecular assembly method. Such materials can be used for the drug delivery, disease diagnosis and therapy, and new nanodevice construction. 相似文献
17.
Caroline Haythornthwaite 《The Information Society》2001,17(3):211-226
A computer-mediated group is a complex entity whose members exchange many types of information via multiple means of communication in pursuit of goals specific to their environment. Over time, they coordinate technical features of media with locally enacted use to achieve a viable working arrangement. To explore this complex interaction, a case study is presented of the social networks of interactions and media use among members of a class of computer-supported distance learners. Results show how group structures associated with project teams dominated who communicated with whom, about what, and via which media over the term, and how media came to occupy their own communication niches: Webboard for diffuse class-wide communication; Internet Relay Chat more to named others but still for general communication across the class; and e-mail primarily for intrateam communication. Face-to-face interaction, occurring only during a short on-campus session, appears to have had a catalytic effect on social and emotional exchanges. Results suggest the need to structure exchanges to balance class-wide sharing of ideas with subgroup interactions that facilitate project completion, and to provide media that support these two modes of interaction. 相似文献
18.
Electronic data interchange (EDI) provides means for interorganizational communication, creates network externalities, requires an advanced information technology (IT) infrastructure, and relies on standards. In the diffusion of such innovations, institutional involvement is imperative. Such institutions contain governmental agencies, national and global standardization organizations, local government, and nonprofit private organizations like industry associations. The last type of organizations we call intermediating institutions. They intermediate or coordinate ("inscribe") the activities of a group of would-be adopters. Unfortunately, little is known of how these organizations shape the EDI diffusion trajectory. In this article we examine one specific type of intermediating organizations?industry associations?and how they advanced the EDI diffusion process in the grocery sectors of Hong Kong, Denmark and Finland. We identify six institutional measures, placed into a matrix formed by the mode of involvement (influence vs. regulation) and the type of diffusion force (supply push vs. demand pull), that can be mobilized to further the EDI diffusion. Industry associations were found to be active users of all these measures to varying degrees. Their role was critical especially in knowledge building, knowledge deployment, and standard setting. Furthermore, institutional involvement varied due to policy and cultural contingencies and power dependencies. 相似文献
19.
Leah A. Lievrouw 《The Information Society》2000,16(2):155-159
This essay focuses on universal service and the Internet as means to support social and political participation. The emphasis on access to telecommunications systems in conventional approaches to universal service is contrasted with access to content. A model of the information environment is described that accounts for the roles of content and conduit, both of which are necessary conditions to achieve true access. A method is outlined for employing information indicators to observe or measure the information environment. 相似文献
20.
Puay Tang 《The Information Society》1998,14(1):19-31
The increasing prospects of digital piracy has prompted the perceived need by electronic publishers to adopt technical systems of protection, and governments to reform their copyright laws. This article is a preliminary study of the management of intellectual property by electronic publishers, defined as those involved in the production of online databases, and CD-ROMs. It focuses on three main issues: (1) how electronic publishers view the increasing threat of piracy; (2) the methods of protection employed to protect intellectual property in digital format; and (3) the importance of technological protection of intellectual property in electronic publications. The analysis is based on a sample of 23 UK electronic publishers. The interviews revealed an interesting assortment of protection methods and did not show that technological protection was a preferred way. Instead, the means of protection, in addition to copyright law, comprised niche markets, pricing, trust, bad publicity, and nontechnical and technical means. 相似文献