半世纪的

Secondly, a commentarial review of this field is given to show the last evolution of it. Although many kinds of useful projective invariance have been derived so far, the sorts of 3D object to which they could be used are still very limited. So there are some needs to develop more powerful invariance for the 3D object recognition. Finally, in the last part of this paper, the future researches in this field are proposed.

0引言 众所周知，3D物体识别是计算机视觉研究的一项重要内容，由于其在军事、工业等社会诸多行业中具有潜在的、巨大的应用价值，半个世纪以来受到各国视觉研究者的广泛关注，并提出了众多的理论和方法川，其中基于几何不变性的3D物体识别方法有助于消除由于观察视角、摄像机参数等

This is then followed by an analysis of Cowell's Quartet Romantic, which presents how theories work in his musical composition. The first chapter of this document discusses the scope of music theory and compositional theory motivated by Seeger's musicological writings, and introduces the musical milieu in early 20th century America.

本论文首先探讨音乐学与音乐理论、作曲理论之间的范畴问题，Seeger一生有部分论述在探讨音乐学的定义，早在二十世纪前半就主张对非欧洲艺术音乐的研究不该偏废，而且不以研究对象的区域作为学科的划分，这样的前瞻性思考影响了后辈的音乐学家如Joseph Kerman (b.1924)。

During the passed half century, Syma grows in an outsting speed, a company that can only manufacture exhibition using aluminium fabrics to an international group with me than 50 branches throughout the wld.

半个世纪以来，司马已从最初的一家研制生产用于展会的铝型材公司，到如今扩展为在全世界拥有50多家分支机构，业务遍及全球的国际化公司，同时也是目前全球唯一的从自行设计到制造材料和搭建展台，集多种功能于一身的服务性跨国集团。

As compared to our ancestors in the field of strongly correlated condensed matter physics half a century ago, we are facing with much more challenging problems which are often beyond the capability of the traditional perturbative methods, although we already have many more advanced analytical tools at our disposal.

与半个世纪前强关联凝聚态物理领域的研究人员相比，现在的我们有更多的高级解析工具可用，但我们所面对的问题也变得更难了，在许多情况下传统的微扰近似的方法都已失效。然而，对这些问题我们也并不是毫无希望的。

Viewing the two novels as a whole, this thesis draws a conclusion that more than half a century ago Willa Cather adumbrated an ecofeminist view about nature and civilization that go beyond a merely instrumental notion of pioneering.

把这两部小说视作一个整体，本文认为早在半个多世纪前，凯瑟就已在她的小说中反映了当今生态女性主义的所倡议的主题，而不仅仅是过去评论界所讨论的实用主义的拓荒精神。

The unemployment rate unexpectedly dipped to 9.7 percent in January, from 10 percent in December, the government reported Friday, buoying hopes that the worst job market in at least a quarter-century is finally improving.

政府有关部门在周五的一份报导中显示，一月份的失业率出人意料地上升为9.7%，比十二月份的10%有所好转。这份报告给糟糕的就业环境燃起了一点希望的星火，在半个世纪以来最糟糕的就业市场终于开始回升。

I have been to Ancient Bridge Gate, fountain in Heracles and the market in front of Holy Spirit Hall, all of which are in those quiet black-and-white photographs in the interleaves, and I have taken the breath of peace and clarity of Heidelberg's winter. What new feelings will these lives half-century before bring me?

插页里那些安静的黑白照片，老桥门、赫拉克勒斯的喷泉、圣灵堂前的市集，我都已到过，我呼吸到海德堡冬日的宁静与清澈，这些半个世纪前的生活，会带给我哪些的新感受？

The trend of doubting ancient history thought which arising in early 20th century cut away and rebated half of Chinese history,the Axial Age theory resumed the validity of the various scholars in later Zhou Dynasty,and went on disregarding the government and official scholars of the San Dai Dynasty,hut the government and official scholars of San Dai Dynasty just is the headstream of the various scholars in later Zhou Dynasty even of the whole Chinese civilization.

追溯民初以来学者早已开始的东西文明比较，更多关注的是在古埃及、古巴比伦、古印度和中华文明的第二阶段上。20世纪初兴起的疑古思潮将中国古史'砍掉半'、'打个对折'，'轴心时代'理论则恢复了晚周诸子学的合法性，但它同时继续漠视三代王官学，而三代王官学正是晚周诸子学乃至整个中华文化的源头。

The trend of doubting ancient history thought which arising in early 20th century cut away and rebated half of Chinese history,the Axial Age theory resumed the validity of the various scholars in later Zhou Dynasty,and went on disregarding the government and official scholars of the San Dai Dynasty,but the government and official scholars of San Dai Dynasty just is the headstream of the various scholars in later Zhou Dynasty even of the whole Chinese ci,vilization.

追溯民初以来学者早已开始的东西文明比较，更多关注的是在古埃及、古巴比伦、古印度和中华文明的第二阶段上。20世纪初兴起的疑古思潮将中国古史'砍掉半'、'打个对折'，'轴心时代'理论则恢复了晚周诸子学的合法性，但它同时继续漠视三代王官学，而三代王官学正是晚周诸子学乃至整个中华文化的源头。

This paper intends to distinguish four types of expressions of " beauty " and "bad-looking" associated with women s body and of "purity" and "immorality" used to describe women s integrity so as to identify the changes in expressions of women s images in contemporary literature since the founding of the People s Republic.

通过对显示女性外在身体特征的&美丽&或&丑陋&与代表女性内在思想境界的&纯洁&或&淫荡&四个元素及其内涵外延的变异体认，可以清晰地考察出建国后半个多世纪以来中国当代文学中的女性形象所经历的巨大话语变迁。

She gently rebuff ed him, but agreed that they could be friends

她婉言拒绝了，但同意作为朋友相处。

If in the penal farm, you were sure to be criticized.

要是在劳改农场，你等着挨绳子吧！