精确

This can be done using computer vision technique and from symmetry property of potteries. The problem of recovering the 3D shape of a surface of revolution from images is addressed. The algorithm makes use of the symmetry properties of a surface of revolution and its silhouette to rectify the image such that the resulting silhouette exhibits bilateral symmetry.

在该方法的实现过程中，首先利用旋转平台获取了旋转体的影像，然后基于物方的空间圆重建方法精确测量旋转体的上口，从而得到旋转体的旋转轴，再根据影像的方位元素对影像进行纠正，使得旋转体的轮廓线在影像上的成像左右对称，最后直接用纠正后的影像精确计算旋转体的形状。

The distribution of gear's contact stress, root stress, and contact engagement line in the engagement situation of gear pairs, were obtained on the base of explicit integration method. 3. Adopting the method of system matrix, the torsional vibration differential equation of general shafting was gained. The simple harmonic forms of excitation torque under the normal combustion or piston flameout of in-line engine and v-type engine were analysed. The decoupled algorithm of free vibration and forced vibration and the solution to the vibration damper's energy of resistance and the off-resonance calculation were studied. The sensitivity formulations of the natural frequency and vibration mode to physical parameters of system were derived by solving the eigenvalue problem. These sensitivity formulations provided the theoretical base for the dynamic modification of structure.

运用系统矩阵法建立了轴系的扭振微分方程，并对直列和V型发动机在正常发火和气缸熄火工况下的激振力矩进行了详细的简谐分析；基于精确方法推导了自由振动和强迫振动的解耦算法，给出了能量法计算中的减振器阻尼功求解和非共振计算方法；并研究了曲轴系扭振非线性分析中的变惯量问题，得到了单缸转动惯量的精确求解公式以及变惯量和固有频率的关系式；最后，从特征方程和振型正交性出发，推导了固有频率和振型对轴系转动惯量和刚度等物理参数的灵敏度，为扭振系统的结构动力学修改提供了理论基础。

Any program that demands precise alignment must offer a vernier.

任何要求精确对齐的程序必须提供精确滚动的游标工具。

But how a more accurate measurement of voltmeter resistance, the experimental use of Wheatstone bridge resistance values measured in the arm, etc.

但如何更精确的测量电压表内阻，本实验利用了惠斯通电桥测中值电阻等臂测量的方法测量并分析了电压表的内阻，依据此实验的结果分析给出了精确测量电压表内阻的建议。

In order to prove the importance of three-body interaction, accurate ArH〓 potential surface and accurate ArAr potential surface are added to construct a two-body potential surface. We found that this potential surface is corresponding with a deep potential well and a tight structure, which is far from the real structure of Ar〓H〓. Obviously, this two-body additive potential surface is not suit in this system.

为了证明三体作用在体系中的重要性，我们用精确的ArH〓的势能面与精确的ArAr的势能面构造了一个两体加和的势能面，发现两体加和的势能面表现的是一个深势阱的紧凑结构，与Ar〓H〓的结构相去甚远，因此可以确认，两体加和在此系统中是不适用的。

Using the three ways of Excel,Autoslip program, block ,this article aims at inquiring into precise drawing of parametric curves and exploring operation procedures of simpler and easier learning.

AutoCAD有很强的二维绘图功能，但无法直接画出精确的渐开线，运用Excel、Autolisp程序、图块三种途径，旨在探讨渐开线的精确绘制，并寻求更为简便易学的操作步骤。

Transcription of received volumes must be current, with at least three true copies of all new works, and four true copies of Compendia.

当前那些已被认可的卷宗必须抄写，至少把所有的新作品精确抄写三份，大纲则精确抄写四份。

The results indicate that the first ten step natural frequency range from 233.2Hz to 526.8Hz, the natural frequency is higher than the value specified by the standard.6. The profile equations of shaping gear ring are deduced out by profile normal line method. The involute and transition curves are automatically generated through the macro function in Solidworks. And the three-dimension model is built. Based on the three-dimension model, the deformation and dedendum stress is studied.

6应用齿廓法线法推导出了插齿加工的渐开线直齿内齿圈的精确齿廓曲线方程，并通过Solidworks中的宏功能采用Visual Basic语言编程实现了内齿圈齿廓渐开线以及齿根过渡曲线的自动生成，建立了内齿圈的精确三维实体模型，研究了内齿圈的轮齿变形及齿根应力。

Dlarification of Bids To assist in the examination, evaluation and comparison of Bids, the Tendering Denter may ask bidders for clarification and the response shall be in writing and no change in the prices or substances of the bids shall be sought or offered.

英语句子类型的表意功能各不相同，招投标文件对句子类型的选择存在着明显的倾向性。因为需要精确客观地陈述，规定各方当事人的权利与义务，招投标文件对句子类型的选择存在着明显的倾向性。因为需要精确客观地陈述、规定各方当事人的权利与义务，招投标文件中陈述句的使用频率比较高。陈述句用于阐述、诠释、申明、规定和判断，语言显得比较客观、平实。例如

A pivotal problem to recognize of the precise position of laser facula has been solved in the process of design work: Firstly the method of background-subtraction is used to eliminate or weaken the affect of background light. Secondly the image threshold segmentation operation and morphologic operation are used to locate the sketchy position of laser facula ; Then the new method of Extracting Edge are designed based on character of laser facula , by using this method in the search area the edges of laser facula can be extracted effectively; At last the optimum picture of laser facular is selected by using the triggering function of hardware and function of software. The exact result can be obtained only by image processing to optimum picture.

在设计过程中解决了精确确定激光斑中心位置这一关键问题：首先利用减背景法，消除或减弱背景光的变化对确定激光光斑中心的影响；再对减完背景后的图片进行阈值分割和二值化处理以确定激光光斑的粗略位置；根据本文激光光斑的特征，设计了一个有效的边界提取算法，对指定区域进行提取激光光斑边界操作，精确的确定激光斑中心位置；最后利用硬件的触发功能和软件编程实现了激光光斑最佳图片的判读，只有对最佳图片进行图像处理得到结果才是准确的。

Since historical times,England ,where the early inhabitants were Celts, has been conquered three times .

从有历史以来，英国，在此地早期居住的是凯尔特人，已经被征服了三次。

Bluetooth OBEX File Transfer Enables the sending and receiving of files on your phone via Bluetooth.

蓝牙OBEX文件移动允许经过蓝牙传送和接受文件。。。。