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1.
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   

2.
2013年,徽信火热了,4G开通了,O2O落地了,B2C强大了,F2C试水了,C2B起航了,王马对赌取消了,董雷对赌升级了。那些被消费者捧起来的当家人,随着事业的暂时成功,气势越来越大,话也越说越大,想当年那些曾经的领先者也大都是一路说着大话走过来走没了!  相似文献   

3.
camcam 《电脑》2004,(6):115-115
现在的摄像头便宜了,身边的朋友几乎都人手一个的,晚上上QQ的时候,大家都双双开视频,还真够热闹了。可是过了一阵子以后,新鲜感过去了,大家都比较情愿把网络的带宽用在下载上了,摄像头用的机会就少了,甚至干脆就卸下来放到抽屉去了。慢慢的,系统新装和删除的东西都多了,已经安装的驱动程序相信早就删去了,而附带的驱动程序光盘,也早就不知道丢哪里去了,当某天忽然又想起这个几乎要被遗忘的摄像头时,重新使用之前,还真的免不了要为驱动程序而发愁。  相似文献   

4.
张敏 《数码时代》2012,(7):148-149
在这个年代,看新闻是很让沮丧的一件事情,因为新闻中充斥着的,总是一些很负面的消息,就像白菜里查出农药了,某个小岛又被占了,渔民被抓了,丧尸又吃人脸了,某国又屠杀妇孺了,股市又跌了,房价又涨了……诸如此类。  相似文献   

5.
《数码摄影》2004,(2):56-58
PC变了,变得平易近人了,变得讨大家欢心了,变得没有以前那么刻板了,就连父亲也喜欢上了它,开始用它看大片了。媒体中心电脑的成熟打破了PC传统的操作理念,使它变成了家庭娱乐中心,成为全家人的新宠。  相似文献   

6.
2004年5月1日,带着中国电信集团领导的嘱托,起程前往美国进行为期三个星期的学习和考察。我们先在美国著名的斯坦福大学商学院学习了工商管理课程,然后对美国的SPRINT公司、MCI公司和中国电信美国公司进行了访问和考察。这次学习让我们开阔了眼界,增长了知识,交流了经验,建立了友谊。在结业典礼上,教授们高度评价我们班.认为学员学习认真,善于思考,提出问题有深度和高度。这次学习中,教授层次高、阵容强,既有扎实的理论功底,又有丰富的实践基础,具有全球化的视野和深入浅出、幽默的讲解,使我们拓宽了思路,丰富了才干,理清了方向.调整了思维方式,对集团的战略决策有了更深的理解,深深感到了历史的责任和使命。  相似文献   

7.
本文简要介绍了钢材的退火工艺,在此基础上采用智能调节仪实现了钢材退火炉炉温的程序控制,克服了退火炉内温度不均匀的现象,改善了控制精度和自动化程度,提高了产品质量和生产率,最后本文简单介绍了电磁兼容的有关概念,分析了本文中存在的电磁干扰并给出了解决方案,实践证明,该方法非常有效。  相似文献   

8.
网络隐患扫描器的设计与实现   总被引:5,自引:0,他引:5  
介绍了网络的不安全性,从网络安全预防的角度分析了网络安全扫描器的工作原理,介绍了几种扫描技术,在该基础上,设计和实现了一个网络安全扫描器,并进行了详细的分析,归纳了该系统的应用特点,并指出了进一步需要做的工作。  相似文献   

9.
在分析了临界路径跟踪法优缺点的基础上,对其进行改进,提出了伪临界路径跟踪法,把伪临界路径跟踪法和并行模拟法结合起来,用于时序电路的故障模拟,大大地减少了待模拟的故障事件数,降低了模拟时间,节省了内存,在文末,给出了软件实现的结果。  相似文献   

10.
宫雨 《计算机工程》2007,33(5):29-31
针对具有上界约束的关联规则问题进行了研究,给出了上界约束的定义,分析了满足上界约束频繁集的性质,并给出了相关的证明。在此基础上,提出了基于FP-Tree的上界约束算法,采用了预先测试的方法,降低了测试项集的成本,提高了计算效率,实验结果证明该算法具有较高的效率。  相似文献   

11.
构件交互模型与组合适配方法研究   总被引:1,自引:0,他引:1  
构件交互操作与构件适配是基于构件的软件开发方法(CBD)中的关键问题。如何更有效地解决构件适配问题以提高软件的开发质量是一个永久的热点。而构件间的交互操作又是解决构件适配问题的关键所在。在已有的研究成果的基础上、基于自动机理论提出了一种构件交互模型。它将构件接口根据所提供的服务不同分为调用接口和使用接口,使得对构件间的交互操作描述的更为准确。在此基础上,对构件组合适配方法进行了分析。  相似文献   

12.
An adaptation phase is crucial for a good and reasonable case-based design (CBD) process, which is responsible for finding a solution to solve a new problem in the principle of k-nearest neighbors (k-NN). Statistical adaptation method is a classical method for feature-based case adaptation (FCA) because of its domain-independent and easily to be implemented, but with low adaptation accuracy. Therefore, this paper presents a new adaptation method for solution feature values of retrieved cases by introducing the adaptability value to improve the adaptation performance, called as adaptability-based FCA (AFCA). Unlike the classical statistical FCA method (SFCA) based on similarity or distance value, AFCA is performed in terms of the adaptability of old solution feature calculated by the adaptability measurement (AM) mechanism. A new AM method is studied as well in this paper, where the adaptability value for each solution feature is computed by utilizing the decision tree technique and similarity value, and the similarity is derived from the multi-algorithm-oriented hybrid SM strategy. Furthermore, to validate the feasibility and superiority of AFCA, the proposed method was applied to the power transformer design and was compared with the classical SFCAs. Empirical comparison results indicated that AFCA achieves the better adaptation performance under k-NN than other SFCAs on the basis of the adaptation accuracy.  相似文献   

13.
A hybrid case adaptation approach for case-based reasoning   总被引:1,自引:1,他引:0  
Case-Based Reasoning is a methodology for problem solving based on past experiences. This methodology tries to solve a new problem by retrieving and adapting previously known solutions of similar problems. However, retrieved solutions, in general, require adaptations in order to be applied to new contexts. One of the major challenges in Case-Based Reasoning is the development of an efficient methodology for case adaptation. The most widely used form of adaptation employs hand coded adaptation rules, which demands a significant knowledge acquisition and engineering effort. An alternative to overcome the difficulties associated with the acquisition of knowledge for case adaptation has been the use of hybrid approaches and automatic learning algorithms for the acquisition of the knowledge used for the adaptation. We investigate the use of hybrid approaches for case adaptation employing Machine Learning algorithms. The approaches investigated how to automatically learn adaptation knowledge from a case base and apply it to adapt retrieved solutions. In order to verify the potential of the proposed approaches, they are experimentally compared with individual Machine Learning techniques. The results obtained indicate the potential of these approaches as an efficient approach for acquiring case adaptation knowledge. They show that the combination of Instance-Based Learning and Inductive Learning paradigms and the use of a data set of adaptation patterns yield adaptations of the retrieved solutions with high predictive accuracy.  相似文献   

14.
Both problem-oriented learning and case-based learning are effective methods for practical knowledge development. However, an automatic development of learning cases for adaptive learning is still an open issue. To support adaptive case-based learning in a proposed problem-oriented e-learning (POeL) environment and to address the complexity and diversity of the learning problems of students with mild disabilities, this study presents a learning case adaptation framework to support problem-oriented e-learning. This framework provides mechanisms to search and match similar learning cases according to encountered teaching problems by information retrieval techniques and to develop an adaptive learning case by adaptation techniques. Adaptation techniques include a substitution technique, a removal technique, and a composition technique, and utilize cosine-measure and genetic algorithm. In this research, adaptive learning cases were developed for teaching students with mild disabilities so as to assist regular and special education teachers to develop practical knowledge of teaching more effectively.  相似文献   

15.
One of the key issues for adaptation algorithms is to modify a large number of parameters with only a small amount of adaptation data. Speaker adaptation techniques try to obtain near speaker-dependent (SD) performance with only small amounts of speaker-specific data, and are often based on initial speaker-independent (SI) recognition systems. Some of these speaker adaptation techniques may also be applied to the task of adaptation to a new acoustic environment. In this case an SI recognition system trained in, typically, a clean acoustic environment is adapted to operate in a new, noise-corrupted, acoustic environment. This paper examines the maximum likelihood linear regression (MLLR) adaptation technique. MLLR estimates linear transformations for groups of model parameters to maximize the likelihood of the adaptation data. Previously, MLLR has been applied to the mean parameters in mixture-Gaussian HMM systems. In this paper MLLR is extended to also update the Gaussian variances and re-estimation formulae are derived for these variance transforms. MLLR with variance compensation is evaluated on several large vocabulary recognition tasks. The use of mean and variance MLLR adaptation was found to give an additional 2% to 7% decrease in word error rate over mean-only MLLR adaptation.  相似文献   

16.
A Flexible Content Adaptation System Using a Rule-Based Approach   总被引:1,自引:0,他引:1  
Content adaptation is an important technique for mobile devices. Existing content adaptation systems have been developed with specific adaptation goals. In this paper, we present an extensible content adaptation system, Xadaptor. We take a rule-based approach to facilitate extensible, systematic, and adaptive content adaptation. It integrates adaptation mechanisms for various content types and organizes them into the rule base. Rules are invoked based on the individual client information. We classify HTML page objects into structure, content, and pointer objects. Existing content adaptation techniques mainly focus on content objects and do not consider adaptation for structure and pointer objects. In Xadaptor, novel adaptation techniques for the structure object HTML table have been developed. We use fuzzy logic to model the adaptation quality and guide the adaptation decision. To demonstrate the feasibility of our approach, we have implemented a prototype system. Experimental studies show that Xadaptor is capable of on-the-fly content adaptation and is easily extensible  相似文献   

17.
This paper proposes a fast unsupervised acoustic model adaptation technique with efficient statistics accumulation for speech recognition. Conventional adaptation techniques accumulate the acoustic statistics based on a forward–backward algorithm or a Viterbi algorithm. Since both algorithms require a state sequence prior to statistic accumulation, the conventional techniques need time to determine the state sequence by transcribing the target speech in advance. Instead of pre-determining the state sequence, the proposed technique reduces the computation time by accumulating the statistics with state confidence within monophone per frame. It also rapidly selects the appropriate gender acoustic model before adaptation, and further increases the accuracy by employing a power term after adaptation. Recognition experiments using spontaneous speech show that the proposed technique reduces computation time by 57.3% while providing the same accuracy as the conventional adaptation technique.  相似文献   

18.
19.
We present a control model, which provides response time and bandwidth requirement adaptation in audio, video, and application sharing multipoint IP teleconferences for emerging wireless multimedia communications. The model is based on revealing feedback controls for multimedia call preparation and subsequent real time connection control. Case-based reasoning memory is used to associate real time congestion (connection) controls with call preparation controls and user QoS profiles. Web agents are used to capture user and application multimedia call profiles observed at the application layer and transfer them into the case memory. RTP statistics are used to identify the connection management feedback controls for the network layer. Real-time adaptation at the network layer and above is made possible by using hierarchical coding techniques. The proposed adaptive management architecture is illustrated by a case memory representation of call preparation feedback controls, RTP feedback control tests for providing audio stream bandwidth adaptation, and configuration of integrated experiments.  相似文献   

20.
Linux平台上的组件开发技术   总被引:1,自引:0,他引:1  
Linux平台凭借其自由开放的精神获得了广大开发者的青睐,基于Linux的应用系统也日渐丰富。概述了当前Linux平台下的组件开发技术。将它们分为四类,分析了各类组件技术的特点,并比较了它们之间的优缺点。  相似文献   

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