共查询到20条相似文献,搜索用时 375 毫秒
1.
2.
3.
范丽娟 《电脑技术——Hello-IT》2002,(11):24-26
捍卫隐私——刻录加密光盘对于一些私人珍藏或者涉及商业机密的文件,仅仅将数据放在保险箱里是远远不够的。为了防患于未然,最好的方法便是利用软件技术进行加密,制作成加密CD。如此一来,即便有人得到光盘也无济于事,因为在读取光盘数据时需要输入密码。加密光盘的刻录不像硬盘数据加密那样简单,而且可供选择的软件也不多,常见的Nero、EasyCD Creator以及WinOnCD都没有提供这一功能。作为加密软件,我们最关注的便是其加密技术。如果加密原理非常简单,那无疑是一张纸篱笆,一捅就破。经过一番试用比较,我们向大家推荐SecureB… 相似文献
4.
随着硬盘中软件和电影的不断增加,海量硬盘也无法满足数据存储的需要,刻录光盘成为多数用户的首选备份方法。想让自己的好作品让别人欣赏,又不想让别人看到光盘中的部分秘密资料时,就需要对光盘内容进行适当加密。下面详细向大家介绍一下如何使用“光盘加密大师”对光盘进行加密。 相似文献
5.
为了防止盗版软件对软件市场的侵害,越来越多的软件商使用加密方法来保护自己的软件.尽管目前加密光盘的方法有很多种,但其主要原理是利用特殊的光盘母盘上的某些特征信息是不可再现的,而且这些特征信息大多是光盘上非数据性的内容,在光盘复制时复制不到的地方.为了能使大家对加密光盘的技术有一定的了解,下面就对目前一些较新的加密技术进行一下介绍. 相似文献
6.
笔者在单位的电脑上保存了很多机密文件,打算刻录到光盘中,不希望别人随意使用光盘上的文件,那就要制作加密光盘了。最常用方法就是先将文件进行加密处理,然后再刻录,虽然实现起来比较简单,但无论是制作过程还是日后使用都不够方便,安全系数也不高。CryptCD是一款专业的加密光盘刻录软件,集加密和刻录于一体,制作过程超级简单,可以将文件加密和光盘刻录同步完成,支持CD和DVD刻录。软件不仅能加密文件内容,还可以连文件名一起加密,也就是说没有正确的密码,就无法看到光盘中的任何机密文件。用CryptCD加密后的光盘安全系数也很高,在读取加密光盘时只有输入密码才能浏览文件,否则光盘就无法打开。基于以上特点,CryptCD成为了笔者制作加密光盘的首选工具。 相似文献
7.
在本刊10月号的“加密与解密”栏目刊登了一篇《留住你的秘密——加密光盘制作初录》(关于光盘加密的章),读反映强烈,为让大家掌握更多、更好的方法,这里再为大家介绍一款光盘加密工具。 相似文献
8.
拥有了刻录机,当然少不了刻盘,如何制作加密光盘呢?很多软件都有加密光盘的功能,但制作带口令加密软件却很少,有的加密软件要求你的电脑上要安装该软件才可以读出经它加密的光盘,非常不方便;还有诸如盗版光盘采用的那一种软件,光盘第一次运行时输入一次注册码即可解密,以后不输入注册码,也可以打开文件,根本没有加密作用。现在介绍一款小巧的加密软件——CryptCD,可以刻录带口令的加密光盘,刻录好的光盘一放进光驱,就会提示 相似文献
9.
我们一些常用刻录软件如Nero并没有提供光盘加密功能,我们刻录出来的数据是任何人都可以查看的。能不能将刻录光盘加上密码.只有知道密码的人才能访问呢?CryptCD就可以做到。它能将件加密打包成加密了的映像件,不知道密码的人别想看到其中的内容。而且.它还支持定制界面背景、字效果和加密等级.更能使用伪装等加密方法来保密数据。 相似文献
10.
11.
ForewordsWiththedevelopmentofscience,theimprovementofsoftwareandhardwareofthecomputerisveryrapid.Thisprovidesthespaceofdevelopmentformultimediatechnology.Intheapplicationofpersonaldataandmultimedia,italwaysismadeintoCD-ROMforitsquantitiesofvoiceandimageanditspermanentpreservation.Itisverywelcomeforitsbiggercapability,lowerpriceandeasyschlepped.Withthepopularizationofthemachineofwritingandrecording,moreandmorepeopleuseCD-Rasthemediaofdatastorage.ThereforeCD-ROMhasbeenthemaincarrierofcommu… 相似文献
12.
现有的非负矩阵分解(NMF)算法往往基于欧氏距离来设计目标函数,对噪声比较敏感。为了增强算法的鲁棒性,提出一种基于干净数据的流形正则化非负矩阵分解(MRNMF/CD)算法。在MRNMF/CD算法中,把低秩约束、流形正则化和NMF技术无缝地融为一体,使算法性能较为优异。首先,通过添加低秩约束,MRNMF/CD可以从噪声数据中恢复干净数据,并获得数据的全局结构;其次,为了利用数据的局部几何结构信息,MRNMF/CD把流形正则化融入目标函数中。此外,还提出了一种求解MRNMF/CD的迭代算法,并从理论上分析了该求解算法的收敛性。在ORL、Yale和COIL20数据集上的实验结果表明,MRNMF/CD算法比现有的k-means、主成分分析(PCA)、NMF和图正则化非负矩阵分解(GNMF)算法具有更好的识别准确性。 相似文献
13.
高性能光盘镜像服务器的研究与实现 总被引:3,自引:0,他引:3
随着网络上光盘资源的增长,光盘镜像服务器成为光盘网络接享的重要技术。针对传统光盘镜像服务器的缺点,文章实现了一个新的基于iSCSI协议思想的高性能光盘镜像服务器,详细介绍了这种光盘镜像服务器的设计方案,并进行了相应的试验测试和性能分析。 相似文献
14.
基于粗糙集理论的数据清洗模型 总被引:4,自引:0,他引:4
论文在基于粗糙集理论的基础上提出一个大数据系统的数据清洗模型,以利于信息不完备决策问题的实施。模型从给定的初始数据出发,在假定属性的重要性量度σ0的前提下,经过一系列的计算,比较属性实际重要性量度σCD(x)与σ0的大小,由此确定属性x的清洗,然后根据清洗后的数据得出相应的决策规则。并给出一个简单的例子来验证数据清洗模型。 相似文献
15.
Testing Forecast Accuracy of Foreign Exchange Rates: Predictions from Feed Forward and Various Recurrent Neural Network Architectures 总被引:3,自引:1,他引:2
In this research, we work with data of futures contracts on foreign exchange rates for British pound (BP), Canadian dollar
(CD), and Japanese yen (JY) that are traded at the Chicago Mercantile Exchange (CME) against US dollars. We model relationships
between exchange rates in these currencies using linear models, feed forward artificial neural networks (ANN), and three versions
of recurrent neural networks (RNN1, RNN2 and RNN3) for predicting exchange rates in these currencies against the US dollar.
Our results on forecast evaluations based on AGS test the tests of forecast equivalence between any two competing models among
the entire models employed for each of the series show that ANN and the three versions of RNN models offer superior forecasts
for predicting BP, CD and JY exchange rates although the forecast evaluations based on MGN test are in sharp contrast. On
the other hand forecast based on SIGN test shows that ANN and all the versions of RNN models offer superior forecasts for
BP and CD in exception of JY exchange rates. The results for forecast evaluation for all the models for each of the series
based on summary measures of forecast evaluations show that RNN3 model appears to offer the most accurate predictions of BP
and RNN1 for JP exchange rates. However, none of the RNN models appear to be statistically superior to the benchmark (i.e.,
linear model) for predicting CD exchange rates.
相似文献
16.
数据采集是工业现场重要的一个环节,选择不同的传感器可以对不同的信号量进行测量,根据对采集的数据进行处理和分析,可以更加精确地了解现场工况。本文以STC89C52RC单片机和MAX187串行AD芯片为核心,并结合CD4051八选一多路开关,设计了一个高精度的温度数据采集系统,实现了多通道的数据采集功能。 相似文献
17.
针对一些对实时性要求较高而数据吞吐量不高的网络服务,提出一种有效减小时延的自适应p-坚持CSMA/CD协议算法。依据与网络性能相关的关键参数之间的关系,提炼出能有效反映网络负载的状态监测量,基于对监测量的联合判断结果,将网络分为轻负载、较轻负载、较重负载和重负载四种状态,并针对不同负载状态调整发送概率[p]和最大避退上限值[Bm]。通过对协议的时延、吞吐量和总线利用率进行仿真,与一般的p-坚持CSMA/CD协议相比,自适应p-坚持CSMA/CD协议能较有效降低时延、减小抖动。 相似文献
18.
While reducing the dimensionality of a corpus, concept decomposition (CD) based on fuzzy K-means (FKM) clustering provides better approximation than CD based on spherical k-means clustering. However, performance of the FKM algorithm is limited by its distance metric and it is proved that assignment of feature weights can improve the performance of FKM. Our work builds upon this analysis and proposes two approaches to feature weight selection. Using four testing document collections, we demonstrate that the CD based on the proposed feature-weighted FKM provides better approximation than the CD based on FKM while maintaining the quality of retrieval. 相似文献
19.
《IEEE transactions on visualization and computer graphics》2000,6(3):236-252
The paper discusses and experimentally compares distance based acceleration algorithms for ray tracing of volumetric data with an emphasis on the Chessboard Distance (CD) voxel traversal. The acceleration of this class of algorithms is achieved by skipping empty macro regions, which are defined for each background voxel of the volume. Background voxels are labeled in a preprocessing phase by a value, defining the macro region size, which is equal to the voxel distance to the nearest foreground voxel. The CD algorithm exploits the chessboard distance and defines the ray as a nonuniform sequence of samples positioned at voxel faces. This feature assures that no foreground voxels are missed during the scene traversal. Further, due to parallelepipedal shape of the macro region, it supports accelerated visualization of cubic, regular, and rectilinear grids. The CD algorithm is suitable for all modifications of the ray tracing/ray casting techniques being used in volume visualization and volume graphics. However, when used for rendering based on local surface interpolation, it also enables fast search of intersections between rays and the interpolated surface, further improving speed of the process 相似文献
20.
This paper applies the surrogate data method to investigate the presence of nonlinearity in neonatal electroencephalogram (EEG) burst suppression (B/S) patterns in order to rationalize the use of nonlinear methods for automated detection of such patterns. To generate surrogate data, the statically transformed autoregressive process (STAP) algorithm is deployed, and, the correlation dimension (CD) and asymmetry due to time reversal (REV) are applied as discriminating statistics. The results of the surrogate data test demonstrate the nonlinearity characteristic of real neonatal EEG signals during both burst and suppression phases at the 0.05 significance level. The evidence of nonlinearity is found in 90% and 87% of bursts and suppressions respectively. Furthermore, the ability of nonlinear tools in detecting B/S patterns in multichannel neonatal EEG signals is investigated using receiver operating characteristic analysis. The experimental results show that the CD outperforms existing methods based on the nonlinear energy operator. 相似文献