磁盘缓存管理机制研究

磁盘缓存是解决I/O性能的一种技术。文章主要讲述缓存管理组成、算法的种类及其管理策略。并对基于频率的替换算法的原理、实现方法做了详细阐述。

三思典型人物报道

典型报道,是指对一定时期内产生的最具有代表性的人或事件进行的重点报道。其中,最为常见的形式是典型人物报道。人物报道记录着以人为核心的事件,应该说,是受众最为关心也是最感兴趣的。

在给定条件下的三角形几何作图

1.已知一边b,此边的邻角∠A及其余两边的和a+c,求作此三角形。注:此题若用已知周长去取代其中已知的a+c,实质相同。解:以b,a+c为两边,∠A为夹角作三角形。b的对角∠P就确定了。

淡淡的彩华 淡淡的感动——美水加贺见的彩色世界

以专攻game系女子高中生在动画 otaku中备受欢迎的美水加贺见,在他的彩图中,可以清晰地看出颜色不过是表示人物轮廓的记号,围绕着细细的轮廓线,是周围那清晰鲜明的颜色。只要看到他的画就可以明白,在轮廓勾线的时候,描绘出完美的曲线是绝对不可缺少的技巧。

论新闻报道的视角

一个有生命力和感染力的新闻,必定是新闻报道的主题贴近实际,贴近生活,贴近群众。而报道主题的提炼与表达,全取决于新闻编采者的功夫。从哪一个角度可以更好地呈现新闻事实,把新闻写深写透写活,使之更好地表现出更深的新闻价值。

Dynamic matrix encoding strategy for voice-over-IP steganography

In order to optionally regulate embedding capacity and embedding transparency according to user's requirements in voice-over-IP(VoIP) steganography,a dynamic matrix encoding strategy(DMES) was presented.Differing from the traditional matrix encoding strategy,DMES dynamically chose the size of each message group in a given set of adoptable message sizes.The appearance possibilities of all adoptable sizes were set in accordance with the desired embedding performance(embedding rate or bit-change rate).Accordingly,a searching algorithm that could provide an optimal combination of appearance possibilities was proposed.Furthermore,the roulette wheel algorithm was employed to determine the size of each message group according to the optimal combination of appearance possibilities.The effectiveness of DMES was evaluated in StegVoIP,which is a typical covert communication system based on VoIP.The experimental results demonstrate that DMES can adjust embedding capacity and embedding transparency effectively and flexibly,and achieve the desired embedding performance in any case.For the desired embedding rate,the average errors are not more than 0.000 8,and the standard deviations are not more than 0.002 0;for the desired bit-change rate,the average errors are not more than 0.001 4,and the standard deviations are not more than 0.002 6.

Through the Works of Gabrielle Roy and R6gine Robin＂ Innovations in Women＇s Writings

The purpose of this paper is to show that autobiographical works like Gabrielle Roy＇s Enchantment and Sorrow （1988） and R6gine Robin＇s La Qudbdcoite （1983）, do not succeed in anchoring the self and eliminating past traumatic experiences. These writers realize that they cannot reincarnate their former ＇T＇ as time has passed and their lives have changed. The self does not let itself be reduced to a definite being but on the contrary mirrors itsef in all its surroundings. Writing the fragmentation of the self makes these authobiographies appear on one hand, fictional as the ＂I＂ always eludes itself. But on the other hand, they best describe the postmodern ＇T＇ who is conscious of the permeability of one＇s own self as well inwards by the influences, the collages of others on the Self as outwards by the projection of the self onto others, like rhizome connecting to others and forming a web of exchanges like in cyberspace

2009:《教育文汇》隆重推出五项征文 欢迎各位作者自即日起踊跃赐稿

一、《家校心桥·家教真经》征文几乎本刊的每一位读者、作者都可以参与这项征文活动:不分年龄、职业、身份,不论是施教者,还是受教者,无论是躬身而为,还是耳闻目睹;凡真实、典型、科学、有效的家教真经均可以为文。"经"不在多,在真,在新,在特,在实,在生动可读。