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Some key problems of line structured light sensor is given comprehensive studies theoretically and practically, which include the analysis of sensor's mathematic model; the improvement of the key parts of the sensor, the light source and imageforming system; the method of on-line measurement and the evaluate of BGA coplanarity. These studies are supported by corresponding satisfactory experiments. This dissertation covers the following aspects concerning the main work and creative research in the subject: 1. The operating theories and features of pattern measuring methods are systematically introduced.

本文成功地将线结构光传感器应用于BGA芯片管脚共面性的在线测试，并针对线结构光传感器测量的一些关键问题进行了深入细致的研究和探讨：建立了线结构光传感器的模型并对结构参数进行了详细的分析，针对传感器的关键环节—光源和成象系统的改进都提出了创新性的理论和方法，对管脚形状比较复杂的BGA芯片球栅阵列的在线测试方法和评定方法进行了理论研究和实验分析，并获得了满意的结果。

Bill Cosby once said,"I don't know the key to success, but the key to failure is trying to please everybody."

Bill Crosby曾经说过，我不知道成功的秘诀是什么，但是我知道怎样会失败，那就是讨好每一个人。

Bill Cosby oncesaid,"I don't know the key to success, but the key to failure istrying to please everybody."

BillCrosby 曾经说过，我不知道成功的秘诀是什么，但是我知道怎样会失败，那就是讨好每一个人。

Nanyang ethanol plant is based on the original system as the core of the country to form one large file enterprises, National 520 key enterprises and key enterprises in Henan Province 50 groups, the alcohol industry is also the first one through the ISO9002 quality system certification companies and the industry-only country approved the establishment of one post-doctoral workstation units.

是以原南阳酒精总厂为核心改制组建的国家大型一档企业、国家520家重点企业和河南省50家重点企业集团之一，同时也是酒精行业最早一家通过ISO9002质量体系认证企业和行业内唯一国家批准设立博士后工作站单位。

Mainly uses in flowered key hole broachings, the single key hole broaching as well as the plane broaching, the different shape surface broaching, the plane tooth profile broaching, the stair surface broaching, each kind of connecting rod and so on round hole broaching, different shape through hole broaching, each kind of gear the broaching, each kind of rack broaching, each kind of synchromesh broaching, each kind of brake pliers broaching, in each kind of air conditioning tubing cross valve seat the plane and so on.

主要用于圆孔拉削、异形通孔拉削、各种齿轮等花键孔拉削、单键孔拉削以及平面拉削、异形面拉削、平面齿形拉削、台阶面拉削、各种连杆拉削、各种齿条拉削、各种同步器拉削、各种制动钳拉削、各种空调四通阀座内平面等。

Modern cryptograph can be divided into symmetrical key system and dissymmetrical key system.

密码体制大体分为对称密码和非对称密码两种。

Reliable cryptograph is set up in math and formal computer science. According to the computational theory, the paper expounds mathematical background for public-key cryptosystem including: the complexity of algorithm and problem, relationship between the length of key and security of cryptogram.

可靠的密码学是建立在数学和形式化的计算机科学产生的结论之上的，本文从计算理论的角度阐述了构建对称密码体制所需的数学背景：算法复杂性与问题复杂性的关系；NP问题与密码学的关系；密钥长度与密码安全的关系。

The keyboard is great, there is only one downside: the Fn key is the right place to have my old laptop ctrl key position ...

键盘是伟大的，只有一个不好的一面：即Fn键是右的地方有我的旧笔记本电脑ctrl键的位置。。。。

Ctrl key together with the 7 key is to speed up voice.

Ctrl 键加上7键是语音速度加快。

The Fn key is usually to the right of the left-hand Ctrl key on the keyboard.

Fn 键通常是在键盘上左侧 Ctrl 键的右边。

Molecular Distillation is a kind of high vacuum distillation method, which is suitable for the separation of high boiling, heat sensitivity and viscidity products.

分子蒸馏技术是一种在高真空条件下进行的连续蒸馏过程，适合于分离高沸点、热敏性及具有生物活性的混合物。

They are to the Noughties what yuppies were to the Eighties .

那在六十年代是时髦的，但在八十年代肯定是过时了