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A novel method of measuring plus lens's focus is given, which is based on LCD, CCD, and digital image processing It is also a discussion on photoelectric method of automatically measuring parameters of an optic system In this method, a LCD is used as a reticle of the collimator, while the image on the accepting side is transformed into digital image and is sent into a computer The focus can finally be calculated out through digital image processing and analysis The method of measurement is introduce...

讨论了一种基于LCD、CCD和数字图像处理的正透镜焦距测量方法，是光电法自动化测量光学系统多个参数的一种有益的探讨。用液晶屏显示分划图形取代平行光管的分划板，用CCD在接收方采集数字图像并送入计算机，通过图像处理和分析得出被测透镜的焦距。运用叠加的方法提高图像的信噪比；结合重心法和平行线拟合方法求取平行线对的间距；应用高精度焦距标准透镜标定数字图像和实际像之间的比例关系。详细介绍了测量和图像处理的方法，进行了公式推导和误差分析，并给出了实验结果

Days painted screen pen - projector partner, it allows you to achieve this kind of operation: hand and teach pole projection screen directly to the ordinary into a touch screen, directly on the projection screen to operate on computer - free to drag, pull, rattle transfer, graphic mark, writing painting easier, use the time to forget the existence of the computer!¤: 4880 yuan / sets?

天绘屏笔-投影机伴侣，它让你实现这样的操作：手拿教杆直接把普通投影屏幕变成触摸屏，直接在投影屏幕上操作电脑--随意拖、拉、摇、移、图文标注、书写绘画得心应手，使用时可以忘记计算机的存在！

The phase modulation character changes with the rotation of two polarizers beside the LCD.

通过实验得到了液晶屏的相位调制深度相对于偏振片角度的变化情况。

Microsoft wants to impose a "black screen" every hour on the computer installed with piratic Window XP Professional, and a label of "piratic" on the munu of Office.

微软要对安装了盗版 Windows XP 专业版的电脑强行每小时&黑屏&一次， Office 的菜单栏将被添加&不是正版&的标记。

Black screen cautioned piratic users,Does Microsoft is a "real man of honour" or "false flunky"?

黑屏警示盗版用户，Microsoft是&伪君子&还是&真小人&？

Black screen cautioned piratic users,Does Microsoft is a "false man of honor" or "real flunky"?

黑屏警示盗版用户，Microsoft是&伪君子&还是&真小人&？

Black screen cautioned piratic users,Does Microsoft is a "real manof honour" or "false flunky"?

黑屏警示盗版用户，Microsoft是&伪君子&还是&真小人&？

Black screen cautioned piratic users,Does Microsoft is a "real manof honour" or "false flunky"?

黑屏警示盗版用户，Microsoft是&真君子&还是&伪小人&？

Major landscape has highland pasture ," lover dam "," girl mountain "," mother tree ", 100 zhang echo wall, purple golden river cuckoo screen, stone forest, coloured mountain, drop water rock, pot stone and lead zinc metropolis etc., gross area ask 100 square kilometers.

主要景观有高原牧场、&情人坝&、&姑娘山&、&母亲树&、百丈回音壁、紫金河杜鹃屏、石林、花山、滴水岩、锅石、铅锌都城等，总面积约100平方公里。

Peahens only choose the peacocks with the longest, most beautiful feathers, so peacocks really have to know how to strut their stuff.

雌孔雀只会让羽毛最长、最美丽的雄孔雀雀屏中选，所以雄孔雀务必要知道怎麼开屏。

We have no common name for a mime of Sophron or Xenarchus and a Socratic Conversation; and we should still be without one even if the imitation in the two instances were in trimeters or elegiacs or some other kind of verse--though it is the way with people to tack on 'poet' to the name of a metre, and talk of elegiac-poets and epic-poets, thinking that they call them poets not by reason of the imitative nature of their work, but indiscriminately by reason of the metre they write in.

索夫农 、森那库斯和苏格拉底式的对话采用的模仿没有一个公共的名称；三音步诗、挽歌体或其他类型的诗的模仿也没有——人们把&诗人&这一名词和格律名称结合到一起，称之为挽歌体诗人或者史诗诗人，他们被称为诗人，似乎只是因为遵守格律写作，而非他们作品的模仿本质。

The relationship between communicative competence and grammar teaching should be that of the ends and the means.

交际能力和语法的关系应该是目标与途径的关系。