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This article according to the function image axial symmetry and the point symmetry basic principle,the use function taylor series expansion,determines and seeks the polynomial function image the axis of symmetry or the center of symmetry.

根据函数图象轴对称及点对称的基本原理，利用函数的泰勒级数展开式，来判定和寻找函数图象的对称轴或对称中心。

The results show that the orthodontic traction, of which the angle to the central long-axis of impacted tooth is 45°, is the best clinical operation, and the semi-automatic modeling method combined reverse engineering software with self-compiled programs can improve the modeling efficiency and accuracy.

结果表明，与牙体长轴成45°方向的牵引方式更适合临床正畸操作；采用逆向工程软件与自编程序相结合的半自动建模方式能提高建模效率和精度。

Vanke City is located in Shenzhen, the central axis of development is the central area of the first extension line, and "three high" city corresponding to yes, Vanke City of interpretation is an idyllic low floor, low-volume, low-density "three lows" of life.

万科城位于深圳中心轴的发展，是中部地区第一次延长线，"三高"城市相对应的是，万科城的解释是一个田园诗般的低地板，低容量，低密度"三低"的生活。

The will be north-south central axis of Beijing sides extension of the Olympic Park connecting North and South-South, the five broad areas.

本报讯 北京的中轴线将向南北两侧延伸，连接北起奥林匹克公园，南至南五环外的广阔地区。

In Tianhe East Railway Station by sea sand southward heart of the new extension of the central axis line, focus on creating Teemall is excellent as the main node of the square central business district.

在天河火车东站的海心沙向南延伸的新的中央轴线，重点是创造良好的天河城的主要节点，广场中央商务区。

This method is to compare the general motion of a rigid body with the force systems in space and the central axis equation of the force systems in space has been derived beforehand.

本文在此基础上，继续了这一工作，具体地给出了螺旋轴上每一点的矢径及坐标所满足的矢量方程和标量方程，即中心轴方程。

Firstly,after the image preprocessing,some features such as axis degree,circularity and central moment are extracted,then BP net is used as weak study machine,and integrate historical information into successive boosting learning.

预处理棉纤维的横截面图，把体现棉纤维的特征的指标从纤维横截面图像中提取出来；然后利用训练好的BP网络作为弱学习算法，使用每一个Boosting分类器学习的历史信息，基于线性回归特征消除策略，消除冗余，据此判别一幅纤维截面图像是否为棉纤维截面图像。

The conclusion is that inductive electromotive force, gotten from sensor with the distribution regularities of weighting function, is proportional to the average flow velocity in pipe and is not relevant to the distribution of flow velocity when flow velocity is non-central symmetry with the central axis.

得出按权重函数分布规律的传感器，在流速非中心轴对称分布时，感应电势仅与平均流速呈正比，而与流速分布无关的结论，从而从原理上解决电磁流量计了高精度测量的问题。

The results are as follow:(1) In static status, the velocity of jet flow shows a symmetry distribution through central axis of enclosure.

结果表明，腔体静止时，射流速度沿腔体中心轴对称分布，腔体中心轴上的速度最大，两侧流速逐渐减小，近壁处为零；腔体转动时，在哥氏力的作用下，射流中心发生偏转，流场相对于腔体中心轴不再对称分布，腔体中各点处的流速分布随角速度而变化，压电射流角速度传感器利用这一特性敏感角速度。

There is an original relationship between traditional hakka residential architecture and the social histories and the regional natural environments at that time. The traditional hakka residential architecture in Meizhou is established on Nature worship, and keep in harmony with natural environments. For examples, the locations of bildings are in line with local conditions; the layouts and styles are usually based on the rule of south exposure and central axis symmetry; the structures lay stress on functions and comfort and harmony with local environments. Unreasonable artificial alteration, for example, cutting slope and building house under the slope are usually triggers landslides, collapses and other geological disasters, and it has become the most dangerous and latent factor to the geological disasters. The ecological environment idea of the traditional hakka residential architecture in Meizhou region has still certain referential significance for modern residential architecture.

实证应用分析研究表明，梅州客家传统民居建筑与当时的社会历史背景、区域自然环境因素之间存在着密切关系；客家民居建筑渗透出尊重自然，与自然环境融为一体的生态环境理念，具体表现为选址上做到因地取舍与回归自然相统一，布局上讲究座北朝南与中轴对称相结合，建筑上注重实用舒适与环境氛围相融合；不合理削坡建房常常诱发崩塌、滑坡等地质灾害，成为地质灾害发生的最大潜在因子；梅州传统客家民居建筑的生态环境理念对现代民居建筑仍然具有借鉴与启示作用。

Listen,point and check your answers.

听，指出并且检查你的答案。

Warming needle is one of effective treatment methods for knee arthralgia aggravated by cold,and it is simple,safety,so it should be developed in clinical acupuncture and moxibustion extensively.

但以本院科针灸门诊在2005年1月—2006年6月期间共收治膝痛患者100余例，经过临床的诊断后，其中施以温针治疗的48例，疗效显著，报道如下。1临床资料本组病例48