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In this paper, according to the characteristics of central projection, aerial photographs were analyzed to discuss displacement of images under tilt conditin or caused by ground undulation, based on which the principles of tilt error and projection error were summarized.

根据中心投影的特性，论述了像片在倾斜条件下所引起的像点位移和像片因地面起伏而引起的像点位移，在对其进行分析的基础上总结出倾斜误差和投影误差的规律，从而说明了不能把像片当作地形图使用。

In this paper, according to the characteristics of central projection, aerial photograph s were analyzed to discuss displacement of images under tilt conditin or caused by ground undulation, based on which the principles of tilt error and projection error were summarized.

本文以航空摄影测量像片为分析对象。根据中心投影的特性，论述了像片在倾斜条件下所引起的像点位移和像片因地面起伏而引起的像点位移，在对其进行分析的基础上总结出倾斜误差和投影误差的规律，从而说明了不能把像片当作地形图使用。这是使用航空像片时必须注意的基本问

Contour Error of linear and circular motion is caused by following error of each axis position servo system.

由于位置伺服系统跟随误差的存在，导致直线和圆弧运动时产生轮廓运动误差。

By means of analyzing the influence of OD surface roundness error on the outer raceway of bearing ring, the processing method of bearing on internal grinder electromagnetic centerless clamper was improved, the influence of roundness error on outer raceway was decreased, meanwhile, the product quality was raised with less waste products.

通过分析轴承环外径表面圆度误差对轴承环外滚道的影响，改进了轴承在内圆磨床电磁无心夹具上的加工方法，降低了轴承环外径定位表面圆度误差对轴承环外滚道的影响，提高产品质量，达到了降低废品损失的目地。

Only two papers known to the author discussed the possible relationship between the estimates of Km and Vmax. Colquhoun (196 9) found a strong positive correlation between these estimates in a simulation study. Subsequently, Oliver (1970) examined this relationship by the asymptotic variance-covariance matrices. These simulation and mathematical analyses were based on the assumption that the substrate concentration is error-free, with the error confined to the reaction velocity. In addition, their work was confined to the several estimation methods.

就作者所知，在本研究发表之前仅有两篇文章讨论过估计值之间的相关性。1969年，Colquhoun通过计算机仿真，发现了估计值之间存在正相关关系，1970年，Oliver用渐近方差-协方差矩阵检验了这一点，但是他们的发现有很大的局限性，其一是限于仅反应速度的测量值有误差这一种情况，其二是限于某几种估计方法。

In compensating error method, error Jabobin matrix has been calculated by all-differential coefficient constricting and simplified.

在误差补偿算法上，通过微分构造的方式计算出误差雅克比矩阵，简化了误差雅克比矩阵的计算量。

Also, the method of error compensation directed by predicted machining error is used in the system which can optimize manufacturing automation and realize system integration.

同时，系统采用了以加工误差预报为指导的误差补偿方法，优化了加工工艺，实现了系统的集成。

This paper gives a simple idea about the problems existing in students' writing: 1 psychological blockage, such as anxiety, lack of interest so on and so forth. 2 Chinglish frequently appears in Chinese students' composition. That is to say Chinese students often use Chinese way of thinking to writing English composition. 3 When Chinese students write, they usually commit intralingual error. Intralingual error is the mistake that students often make when they choosing words, making sentences. It also includes grammar mistake. 4 Chinese students often don't know how to organize the ideas when they face the composition topic. As a result, the compositions written by most of Chinese students don't have clear topic sentence. 5 Chinese students' compositions are usually very boring and dull. Based on the problems that exit in Chinese students' composition, this paper put forward five teaching strategies: 1 English teachers should foster positive emotion when they teach writing.

本课题简单阐述了中学生英语写作中普遍存在的5个问题：1、对英语写作存在心理障碍，比如畏惧心理等；2、中学生英语作文存在大量"中国式英语"，即学生经常借用汉语思维进行英语写作，使得文中出现不符合英文习惯的句子和表达；3、中学生在进行英语写作时经常犯言内错误，言内错误指学生在用词，造句及句法等方面经常容易犯的错误；4、中学生在面临所给的作文题目时不知道如何审题，写出来的作文中心思想不明确；5、中学生英语作文普遍存在内容单调贫乏的问题。

It is shown that as the deviation of the interval factors of the design parameters are similar and close to unity, the computational error of the fast methodology are determined by the dispersion between the interval factors; and the error comes up to zero if all the interval factors are equal.

当诸参数的变化区间相对其均值的离差较小时，区间结构矩阵特征值的计算精度主要由各区间因子的差值大小所决定；且当各区间因子的差值为零时，误差亦为零。

In light of the error correction model, there exists a dynamic adjustment mechanism between the two, by which the error correction term automatically brings about their long term equilibrium.

从误差修正模型来看，短期内山东省财政收入与GDP之间存在动态调整机制，由于误差项的存在，可以自动地实现二者之间的长期均衡关系。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。