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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。

Firstly , the following proofs are made by means of homothet-ic transformation : 1 the centre of a nine-point circle is at the midpoint of ligature of its curcumcentre andorthocentre; 2 the radius of nine-point circle is equal to half of the radius of its curcumcircle.

本文给出一个简单的证法，先用位似变换的方法证明九点圆的圆心在外心和垂心连线段的中点，九点圆的半径等于外接圆半径的一半。

Firstly, oscilloscope control system based on GPIB technique is presented with friendly operation environment to the HIFU system, and it uses multithreading technique in programming to realize real-time recording and display of the signal; Secondly, temperature collection and data recording system is designed, which also could get real-time recording and display of the 16 channel temperature signal, and it's believed to be of great use for further experiments of the HIFU system; Thirdly, multiple ultrasonic phased array's phase shifter is designed,which could provide 8-bit phase control in a range of frequency where the centrical frequency is 1MHZ. Fourthly, the module of serial communication is realized to insure the communication between devices and computer, including both synchronous and asynchronous communication, which enables the system to transfer data reliably and stably; Finally, the module of digital quantity control is accomplished, which provide for upper application the consistent solution to the control of exterior devices via digital interface. It can get or set the devices state using interrupt mode to receive input signal or send output signal.

主要有以下几个方面：设计了基于GPIB的示波器控制系统，给课题的研究工作提供了一个良好的环境，它采用了多线程编程的方法，能够较好的实时显示当前波形并记录数据；设计了温度采集和数据记录系统，能够对16路温度信号进行并行同步的实时采集，用于HIFU剂量学研究中温度场检测和医疗评价；设计了相控阵相位延时电路并且通过调试，满足了课题的相位控制的要求，在中心频率为1MHZ左右的频率范围内都能够达到8-bit相位控制；实现了串口通讯模块，为各项设备与计算机之间的通讯提供保证，它提供同步和异步的通讯能力，使系统能够可靠稳定的传输数据；建立了数字量控制模块，为上层应用程序提供一致的方法使用数字接口控制外部仪器，它使用中断的方式来接收输入或输出设定的开关量信号，从而得到或设定各种仪器的状态。

It firstly parses the CESS value creation system through the analysis of four dimensions in the CESS value creation model.

文章先以CESS价值创造模型为基础，通过对此模型的四维分析，解构CESS价值创造体系。

Firstly, standing on any crossroad at your will, looking around, you will find several good chafingdish eateries and snack bars without striking a blow. The unique hot and spicy smell in Sichuan food remains all day in the air, stimulating your taste bud from time to time, arousing your impulse to have a big satisfactory meal.

一、随便找一个十字路口，左右张望一下你就会毫不费力地找到几家不错的火锅店和小吃店，弥漫在空气里终日不散的那种四川特有的麻辣香味，随时会刺激你的味蕾，使你产生一种恨不能马上冲进去大块朵颐一番的冲动。

This article is to discuss coordination order on supply chain in three different conditions, which are presented detail as follows:Firstly, supply chain coordination under symmetrical information condition.

以前很多学者在研究供应链协作订购时，都假设了一个前提：即产品的需求信息和生产等过程中的成本信息在销售商和制造商之间是对称的，然而在现实生活中信息不对称的情况是非常常见的，制造商和销售商为了能够获得更多的利润，都有意的隐瞒各自所掌握的信息。

Firstly this paper tells research category and meanings of cost control and analyses how to control costs by value chain and cost drive factor.

文中讲述了成本控制的研究范畴及其含义，通过价值链和成本驱动因素分析研究成本控制的方法和途径。

Firstly, the new watershed transformation using extended chain code was introduced. Then a new region merging method for solving over-segmentation was discussed. Experiments show the new algorithm can segment the road regions correctly.The structured road edges can be represented by straight line or segmented lines.

首先在分析经典分水岭变换算法的基础上，提出了一种新的基于扩展链码的快速分水岭变换算法，使得分水岭变换更利于实时应用；然后通过对过度分割产生原因的分析，提出了新的基于区域灰度和位置约束的过度分割解决方法，并在道路区域分割应用中取得了良好效果。

It firstly defines the internal control of the value chain and the internal control system of the value chain as well as the related concepts.

第三章对价值链内部控制环境中的价值链信息平台进行了探讨。

In order to investigate the application of linear chamber blasting in complex environment,firstly,action mechanism of linear charge was analyzed.

为了研究条形药包硐室爆破在复杂环境下的应用问题，首先分析了条形药包的作用机理，根据已有硐室爆破平面药包布设的半理论半经验公式，建立了条形药包平面布设数学模型。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。