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收到客户的反馈,说运行了一年的网站突然遭到黑客的攻击,系统cpu一直保持在100%,有进程也干不掉,然后客户就进行杀毒了,然后就把所有的exe文件都杀了,然后系统也就很多功能不正常了,数据库的服务也干掉了,然后笔者去看了下,发现网站目录下面被上传了大量的asp、php,htm的页面,里面的目录也有黑客上传了自己的目录,浏览哪些defalut. asp等方面的页面,就是黑客植入的页面,那要是被用户看见了,那真是一炮走红啊,黑客还很牛B的留下了脚印,果断写了自己的大名,在这种情况下,意识到这是中了WebShell木马,我立刻关闭了网站,然后来找解决方案。 相似文献
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科学技术的日新月异发展,多媒体技术已经进入了课堂,优化了课堂教学,提高了教学效率,突出了学生主体地位,激发了学生学习欲望,调动了学生学习的积极性、主动性、创造性,扩大了知识容量,促进了学生想象思维的发展,实现了课堂教学过程的最优化。本文试就多媒体技术在小学语文教学中的应用进行了探讨。 相似文献
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倒退个五年左右吧,那时国外有个蛮著名的什么经济学家,提出了一个概念——眼球经济。大致的意思就是说——扯住你的眼球,那些网站之类的就能非常爽。因为他们可以烧钱嘛,有了众多的眼球来看,不对,他们的说法叫浏览——有了众多的眼球来浏览他们的站点,就能有大笔的投资,有了投资,就能让那些CEO们财大气粗地烧钱——反正不是他们的钱,不烧白不烧,烧了才NB。后来,时代进步了,金融风暴来了,网络泡沫破裂了,一批又一批网络公司倒闭了,烧钱的CEO们下台了,网民大叫不好了,中国网络经济完蛋了……谁知有线网络崩溃了,无线联络崛起了,手机短信火… 相似文献
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史力猛 《计算机光盘软件与应用》2011,(13)
随着信息的技术发展,我国大部分医院都建立了自己的信息化系统,不仅促进了医院的管理水平,提升了医院的服务质量,而且增强了医院的竞争力,提高了医院的经济效益。文章阐述了医院信息化系统的内涵,介绍了医院信息系统建设的重要意义以及具体措施。 相似文献
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为了提高整个远程复制系统的性能,对卷复制系统进行了优化.采用了多线程并行处理技术和流水线技术,设计了一种高性能的日志和位图,采用了网络自适应的复制协议和高效的请求合并策略.实验结果表明,该优化策略减少了应用等待的时间,降低了网络发送的时间开销,合理利用了有限的复制带宽,提高了复制效率. 相似文献
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电脑无法启动,忘记密码了,账号被盗了,咖啡泼在键盘上了,刚给老板发了封难堪的邮件就后悔了等等,我们整理出了PC日常应用中最常见和最容易发生的11个大灾难。在这里为每一种灾难的发生都给出了相应的解决方案,同时还给出了避免灾难的预防性措施,希望能够对您有所帮助,帮助您远离这些灾难。 相似文献
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江雨燕 《计算机工程与设计》2007,28(1):162-163,233
基于因特网环境的CSCW中协同控制的研究,提出一个协同控制机制的概念模式,依此模式发展一个协同控制协议,实际应用于CSCW环境,使得在一个多用户信息共享环境中的群体合作能顺利进行,并增进了CSCW系统的协同程度和确保数据的一致性,发展成为一个可以应用于CSCW环境的协同控制协议.通过对该协同控制模式的研究结果,建立有实际应用目标的CSCW环境,推广到远程协作学习、协同设计、协同会诊、协同创作、群体决策等应用领域. 相似文献
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Interannual covariability between actual evapotranspiration and PAL and GIMMS NDVIs of northern Asia 总被引:2,自引:0,他引:2
This study examined the covariability between interannual changes in the normalized difference vegetation index (NDVI) and actual evapotranspiration (ET). To reduce possible uncertainty in the NDVI time series, two NDVI datasets derived from Pathfinder AVHRR Land (PAL) data and the Global Inventory Monitoring and Modeling Studies (GIMMS) group were used. Analyses were conducted using data over northern Asia from 1982 to 2000. Interannual changes over 19 years in the PAL-NDVI and GIMMS-NDVI were compared with interannual changes in ET estimated from model-assimilated atmospheric data and gridded precipitation data. For both NDVI datasets, the annual maximum correlation with ET occurred in June, which is the beginning of the vegetation growing season. The PAL and GIMMS datasets showed a significant, positive correlation between interannual changes in the NDVI and ET over most of the vegetated land area in June. These results suggest that interannual changes in vegetation activity predominantly control interannual changes in ET in June. Based on analyses of interannual changes in temperature, precipitation, and the NDVI in June, the study area can be roughly divided into two regions, the warmth-dominated northernmost region and the wetness-dominated southern region, indicating that interannual changes in vegetation and the resultant interannual changes in ET are controlled by warmth and wetness in these two regions, respectively. 相似文献
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从对地观测技术计划入手, 对美国、欧空局、加拿大、日本、印度以及俄罗斯的对地观测技术发展现状和策略进行了概要的介绍和分析。美国EO S 计划的提出和实施带动了新一轮对地观测技术发展的浪潮, 而地球科学事业(ESE) 战略计划是对EO S 的提升与延续, 将地球系统科学的概念引入到计划中, 把对地观测技术与面临的科学问题紧密结合起来; 欧空局以遥感卫星1 号、2 号, 以及环境卫星而立足于世界对地观测技术前列, 法国以高分辨率SPO T 卫星系列、加拿大则以雷达卫星系列为其对地观测技术的特色发展策略。日本制定了未来对地观测基本策略, 并给出了未来卫星研制和发射计划日程; 俄罗斯作为空间大国, 在对地观测技术发展方面较为滞后, 近年来开始进行追赶; 发展中国家印度非常重视对地观测技术的发展, 随着其资源卫星的发射并稳定地提供数据,其对地观测技术发展引起世界广泛关注。 相似文献
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《Ergonomics》2012,55(9):1317-1329
Hotness, weight, fitting problems etc., have been found to be the chief causes of the unpopularity of industrial safety helmets in tropical environments in developing countries (DC). Some selected safety helmets manufactured in industrialized countries (IC) were modified to provide extra head ventilation and to reduce weight, in order to make them more acceptable to users in hot environments. The modified helmets were subjected to ergonomics evaluation both objectively and subjectively in the laboratory (in simulated tropical conditions) as well as in the field situation. There was evidence that white helmets had some advantages in comfort, viz. reduction of hotness, compared to the other colours, e.g. red, green etc., when worn in the presence of radiant heat in the laboratory. Ventilation holes provided at the top of the shell seemed to reduce the greenhouse effect within the helmet shell which therefore felt less uncomfortable than a fully covered helmet. Even with a small reduction of weight, such as 45 g in helmets weighing about 350g, the difference in weight was perceived by the wearers. In adapting helmets made in IC for use in tropical climates, head ventilation and low weight perception are important aspects in comfort which need to be considered. In addition to low cost, a harness material suitable for sweat absorption is required. Adjustability and sizing to fit 90% of the user population also needs to be considered in the design and manufacture of safety helmets for people in DC. 相似文献
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通信技术在电力中的应用分析 总被引:1,自引:0,他引:1
近年来,随着经济的发展,科技的不断进步,电力产业也得到了迅速的发展,建设强大的数字化智能电网已成为必然趋势。电力系统中主要以智能电网为主开拓业务,以通信技术支持整个信息网络作为可操作平台,对电力系统中发电、变电、输电、调度、用电以及配电等方面进行智能操控,因此,通信技术在电力智能系统中的业务应用等,可加速实现电力、信息以及业务等的高度融合。而本文主要阐述几种主要的通信技术在电力智能电网系统中的主要作用,以及通信技术在整个电力系统(智能电网)的应用。 相似文献
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为准确分析中国地区气溶胶空间分布与时间变化特征规律,首先利用中国地区9个AERONET(Aerosol Robotic Network)地基站点观测资料对新一代静止气象卫星Himawari-8气溶胶光学厚度(Aerosol Optical Depth, AOD)产品数据进行一致性验证,并在此基础上选取2015年7月至2018年4月Himawari-8逐小时AOD数据分析了中国地区气溶胶光学厚度时空变化特征。结果表明:①Himawari-8 AOD与AERONET AOD之间相关性很高,9个站点的相关系数R在0.64 ~ 0.91之间,拟合曲线斜率k的范围为0.57 ~ 0.68。②Himawari AOD产品与AERONET AOD的相关性在中午时段较其他时段相对较低;北方地区Himawari-8 AOD冬季反演效果与夏季相比较差,南方地区则相反。③中国地区年平均AOD呈东高西低分布,春、夏两季AOD明显高于秋、冬两季,其中夏季最高,春季次之;地区间AOD月变化差异也较大;大部分地区AOD日变化呈现先下降后上升再下降的趋势,AOD最高值出现在午后14 ~ 16时,最低值出现在18时。研究结果为了解中国地区大气气溶胶的时空变化规律和全天时的大气污染监测方法提供新的参考。 相似文献
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J. Vlietstra 《Computers in Industry》1984,5(1):3-20
Ever since the introduction of computers in development and engineering departments, design activities have been supported by computer methods in a growing number of design functions, in the interest of reducing development time and cost, and increasing the quality of the products. Computer Aided Design (CAD) — a generic term for these computerized tools — is recognized as a method for drastically reducing the development time of industrial products.CAD methods are currently being used during each of the various phases in the development activity. The introduction of these CAD tools for the various stages in the development cycle, however, was to a large extent effected in isolation, i.e. not as a “subset” of an overall concept. Lack of such a concept, with its inherent disciplines and compatibility aspects, has given rise to sub-optimal efficiency and effectivity. To remedy this situation, a generalized architecture for CAD has been developed. This architecture drastically reduced the large variety if input methods, combines all product data in one well-structured product file, supports all necessary design functions, assures the proper generation of technical documents, and above all, facilitates maximum efficiency by integrating the processes for various stages in the development cycle.The essentials of ARCADE will be described in this article, together with how the system is designed.The “ARCADE” way and method of working in an organization in which development, engineering, manufacturing, logistic and documentation departments are concerned with technical automation issues will, as such, be discussed.Benefits will, of course, also be elucidated. 相似文献
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意境这个概念作为中国古典美术的最高审美理想,它的形成及发展都带有鲜明的民族特色。研究珠宝设计中对意境美的表现——探寻中国传统的审美理想在当下设计艺术中的运用,对于寻求当代珠宝设计民族化的道路具有重大意义。通过对意境的艺术建构的分析,找到在珠宝设计中表达意境美的方法:首先,创构意象;其次,运用对比与调和的手法建构意象间的内在联系,最终实现在珠宝设计中对意境美的表现。 相似文献