访问

Role based access control is one kind of access control technologies which has been developed in the recent years.

基于角色的访问控制是近年来发展起来的一种访问控制技术，可降低访问控制的复杂度。

Grid access control can solve the problem of resources sharing and managing.

网格安全是网格计算中的一个重要问题，网格的访问控制可以解决网格环境下的资源共享和管理问题，基于角色的访问控制是最具影响的高级访问控制模型。

Also presented herein is the design of dynamic policy allocation with help of active capability .

目前支持的策略有：强制的访问控制、自由的访问控制和基于角色的访问控制等。

A DVD also allows you to watch feature-length movies on your computer.

一 DVD驱动器可以访问CD-ROM中的多媒体信息驱动器可以访问CD 中的多媒体信息，个DVD驱动器可以访问CD-ROM中的多媒体信息，也能让你在计算机上观赏高质量的电影。

Instead of calling on some scholar, I paid many a visit to particular trees, of kinds which are rare in this neighborhood, standing far away in the middle of some pasture, or in the depths of a wood or swamp, or on a hilltop; such as the black birch, of which we have some handsome specimens two feet in diameter; its cousin, the yellow birch, with its loose golden vest, perfumed like the first; the beech, which has so neat a bole and beautifully lichen-painted, perfect in all its details, of which, excepting scattered specimens, I know but one small grove of sizable trees left in the township, supposed by some to have been planted by the pigeons that were once baited with beechnuts near by; it is worth the while to see the silver grain sparkle when you split this wood; the bass; the hornbeam; the Celtis occidentalis, or false elm, of which we have but one well-grown;some taller mast of a pine, a shingle tree, or a more perfect hemlock than usual, standing like a pagoda in the midst of the woods; and many others I could mention.

我并没有去访问哪个学者，我访问了一棵棵树，访问了在附近一带也是稀有的林木，它们或远远地耸立在牧场的中央，或长在森林、沼泽的深处，或在小山的顶上；譬如黑桦木，我就看到一些好标本，直径有两英尺：还有它们的表亲黄桦木，宽弛地穿着金袍，像前述的那种一样地散发香味，又如山毛榉，有这样清洁的树干，美丽地绘着苔藓之色，处处美妙呵，除了一些散在各地的样本，在这乡镇一带，我只知道有一个这样的小小的林子，树身已相当大了，据说还是一些被附近山毛榉的果实吸引来的鸽子播下的种子；当你劈开树木的时候，银色的细粒网闪发光，真值得鉴赏；还有，椴树，角树；还有学名为Celtis occidenta lis的假榆树，那就只有一棵是长得好的；还有，可以作挺拔的桅杆用的高高的松树，以及作木瓦用的树；还有比一般松树更美妙的我们的铁杉，像一座宝塔一样矗立在森林中；还有我能提出的许多别的树。

This paper presents a self-adaptive load balancing algorithm, in which each peer creates a local load distribution view using a passive load statistic method and a local file requested view using file requested statistic method. When load imbalance exists in the system, the heavy loaded peer will make the logical links which point to itself to point to a light loaded peer in its local load distribution view, with the indegree of the heavy loaded peer decreasing and the indegree of the light loaded peer increasing, the load imbalance magnitude will decrease. When the request load of the heavy loaded peer is high, the peer will use its local file request view to get the popular file and cache the file to corresponding target peer.

提出一种自适应负载均衡方法，方法采用一种被动式结点负载统计方法生成局部负载视图；采用一种文件访问统计方法生成局部文件访问视图；当系统内结点负载存在差异，重载结点把指向自身的逻辑链路迁移至指向局部负载视图中的轻载结点，通过减小重载结点入度和增加轻载结点入度来减小结点间负载差异；当结点的请求负载较高时，通过局部文件访问视图计算需要缓存的热点文件及目标结点，降低承载热点文件的结点的请求负载。

When you visit our Sites, some information is also automatically collected, such as your computer's Internet Protocol address, your computer's operating system, the browser type, the address of a referring web site, and the time and date of your visit and Site pages visited.

当您访问我们的网站，提供一些资料也是自动搜集，如你的电脑的因特网协议地址，您电脑的作业系统，浏览器类型，地址是指一个网站大量的时间和日期，您的访问，网站页面访问。

From the end-user perspective, the primary advantages of distributed file systems are that they provide access to substantially more storage than could be physically attached to a single system, and that this storage can be accessed from any authorized workstation.

从终端用户角度，分布式文件系统的基本优势是它能提供访问远多于一个单独系统物理连接所能访问的存储，这种存储可以从任何经过验证的工作站访问。

The user can search him to want the forum of the visit at any time, and 5 forum that sina forum also visits self-recording user recently, when the user is being visited next time, although do not login,also can use these records.

用户可以随时搜索自己想要访问的论坛，而新浪论坛也将自动记录用户最近访问的5个论坛，用户在下次访问时，即使不登录也可使用这些记录。

An improved shceme for the old double-way authentication access control scheme based on Harns digital signature is proposed. The new double-way authentication protocol of the improved access control scheme can prevent man-in-the-middle attack and replay attack. After strict formal analysis with BAN logic, the result have proved that the authentication protocol is secure. The improved access control scheme is realized by the mode of single-key-lock-pair. Under new access control scheme, user can own several kinds of access right upon one file under the new scheme without the supposition that the access rights is increase by degrees, and the possibility of overflow problem is significantly reduced by our new method

作为对原双向认证访问控制方案的改进，改进后的双向身份认证协议可以很好的抵抗中间人攻击和重放攻击，经过严密的BAN逻辑形式分析和论证，结果表明该协议是安全的；改进后的访问控制方案用单钥-锁对方案实现，除保持了一般单钥-锁对方案的良好动态特性外，在不需要访问权限递增假设下，实现了用户对文件的多种访问控制权限，并大大减小了溢出问题的发生可能

I am accused of being overreligious," she said in her quiet, frank manner,"but that does not prevent me thinking the children very cruel who obstinately commit such suicide.""

客人们在卡罗利娜·埃凯家里，举止就文雅一些，因为卡罗利娜的母亲治家很严厉。

Designed by French fashion house Herm è s, this elegant uniform was manufactured in our home, Hong Kong, and was the first without a hat.

由著名品牌 Herm è s 设计，这件高贵的制服是香港本土制造，是我们第一套不配帽子的制服。