Internal coating used in high pressure, large diameter and long distance gas pipeline has two main functions, one of them is anti corrosion and the other is drag reduction. 高压、大口径、长输天然气管道采用内涂层主要具有两大功能,一是防腐蚀,二是减阻。
The disturbances caused by joint gap, friction, or internal impact within limited distance, gravity and aerodynamic drag are discussed. 还对连接间隙、摩擦、限位内碰撞、预应力、重力场及空气阻力的干扰进行分析;
Research on Internal Circumferential Automatic Welding Equipment and Process for Long Distance Pipeline with Big Size 大口径长输管道内环缝自动焊设备及工艺研究
By using geometry analysis method, this paper educed calculation formula of normal direction gear side clearance when internal gearing involute gear transmission center distance waned slightly. 通过几何分析的方法,导出了内啮合渐开线齿轮传动中心距略变小时,法向齿侧间隙的计算公式,供齿轮传动设计计算之用。
Internal Pressure of Molten Salts and Distance Between Positive and Negative Ions 熔盐的内压与正负离子间距
The Application of Internal Corrosion Detection Technology in Long Distance Pipeline 长输管道内窥检测技术的推广及应用
Second, the discharge coefficient of two phase flux increases with the decreasing of the mixer transition angle, the recess length of internal and outer injector, the mixer length, and the distance between the inlet orifice for gas and the mixer outlet. 两相流流量系数随着混合腔出口过渡角度、内外喷嘴缩进长度、混合腔长度和混合腔的进气孔位置到混合腔出口距离的增加而减小。
During nighttime with light wind the depth of ground inversion is about 200m. The depth of internal boundary layer increases with the distance from the upwind hedge to about 100m at the downwind fringe. 夜间微风时,接地逆温层厚度可达200m,城市内边界层从上风边缘起开始发展,厚度可达100m。
On the basis of computer calculations for a series of image tubes, we proposed an approximation for structure characteristic parameter K characterizing the internal connection between magnification M, object distance P and image distance Q of an electron-optical system. 本文在对象管的一系列计算基础上,进一步提出表征电子光学系统放大率M、物距P与象距Q之间内在联系的结构特征参数K的近似值。
Internal stress of welds seam for long distance pipeline is analyzed starting with any point of circumferential stress on pipe wall. 从钢管壁上任意一点的环向应力入手,分析了长输管道焊缝的内应力。
In the process of shape recognition of blanking part, the external shape feature, the internal shape position feature, the external shape feature vector and the internal shape distance are proposed based on 2D geometric shape features. 在冲裁件的几何形状识别中,基于二维几何图形特点提出了外轮廓特征、内部图形布置特征、外轮廓特征矢量和内部图形距离。
The paper expatiates the development of virtual lab in internal or overseas, and the information of application of virtual experiment on distance education. 论文阐述了国内外虚拟实验室的发展,及虚拟实验在远程教学中的应用和发展情况。
Using internal counter to record traveled time and distance, and on LED monitor real-time demonstration causes this design to hasten the intellectualization and the human nature. 运用计数器记录时间和路程,并在LED数码管上实时显示电动车行驶时间和路程,使得本设计更趋智能化,人性化。
A special four-core fiber has been designed and demonstrated, in which the internal distance between the neighbor cores is smaller. 设计了芯间距较小的特殊结构四芯光纤,可用于生成格子光场或用于制作光纤传感器。
This article is pointed out that the internal control system of our country commercial bank still is in stage newly established, and the internal control ground range international standard still has the equivalent distance, and the real effect is also too not ideal? 本文通过对我国商业银行内部控制现状进行调查研究后指出,我国商业银行的内部控制体系还处于初级阶段,内部控制水平距离国际标准还有相当的距离,内部控制的实际效果也不太理想。
Analysis and study of internal pressure for long distance slurry pipeline under complicated topography 复杂地形下长距离浆体管道的内压分析研究
Autocontrol sheet distance is recommended at assembling of the heat sink of internal combustion engine by the 8031 single chip microcomputer, and the sheet distance is can discretionary adjusted. 介绍用8031单片机自动控制装配内燃机散热器的叶片片距,且片距可任意调整。
Therefore the techno economic analysis of the internal and external coatings of the long distance gas transmission pipeline is a hot spot followed with great interest by the policy making circles and technological circles of petroleum engineering in China at present. 因此,天然气长输管道内外涂层技术经济分析,是目前我国石油工程决策界、技术界十分关注的热点问题。
The tensor tympani muscle was 2.2 mm in average to the horizontal segment of the petrosal portion of internal carotid. The average distance between the horizontal segment and middle meningeal artery was 6.8 mm, and 6.9 mm to mandibular nerve. 颈内动脉水平段距鼓膜张肌平均为2.2mm,距脑膜中动脉和下颌神经分别平均为6.8mm和6.9mm。
A Study on the Internal Quality Assurance System of Modern Distance Schooling Education 现代远程学历教育质量的内部保证体系研究
Internal Stress Analysis of ihe Welds Seam in Long Distance Pipeline 长输管道焊缝的内应力分析
FOM method is a classic method of internal validity, but the method reflected the differences by Euclidean distance within the class, is not suitable for evaluated the clustering results of AECG waveform. FOM方法是经典的内部评价方法,但该方法反映的是在欧式距离下的类内差异,并不适合对动态心电波形聚类结果进行评价。
In building index structure, for each hash bucket, its internal feature vectors are stored in ascending order in accordance with bucket center distance of their respective hash bucket. 在建立索引时,对于结构中的每个哈希桶,其内部特征向量按照与所属哈希桶的桶中心距离进行升序排列存储。
Measure the distance between inside edge of bilateral internal carotid artery, the diameter of the beginning part of the branch of the internal carotid artery cavernous segment and the distance between cranial nerve of cavernous segment to the midline. 3. 测量双侧颈内动脉内侧缘的间距,颈内动脉海绵窦段分支起始部直径及海绵窦段颅神经到中线的距离。
Neglecting the effects of upstream and downstream enterprises of the cost, the company to control the cost and increase profit advantage is gradually reduced, the internal management and the big gap between the distance refinement. 而忽略了上下游的企业对其成本的影响,公司进行成本控制而提高利润的优势正在逐步缩小,内部管理距离精细化还有很大的差距。
Some nodes energy can be saved since the internal anchor nodes not participate in the process of the average distance of each hop selection in DV-hop and the correction weight selection in DV-Distance. 在DV-Hop算法平均跳距选择和DV-Distance算法修正权值选择过程中,由处于网络内部的锚节点不参与这个过程,能够节省一部分网络节点的能量消耗。
Through the internal and external parameters of camera calibration and optimization choice of baseline distance, binocular calibration precision and stability is improved. ( 4) In the denoising image, this paper proposes a smooth filtering method of retention characteristics of image edge details. 通过摄像机标定的内外参数和基线距的选择优化,使双目视觉标定的精度和稳定性得到提高。(4)在图像的降噪处理方面,提出了一种保留图像边缘细节特征的平滑滤波方法。
The camera internal parameter is obtained by calibrating the actual distance and its corresponding pixels in image. 通过事先标定的实际距离与实验图像中像素距离的对应关系得到摄像机内部参数,进而测得本车与盲区车辆的车距。
At first, analysis, understanding and judgment the common feature extraction algorithm, proposed a texture feature algorithm which based on the internal structure of objects, and then get the similarity distance of image texture feature vector by Euclidean distance. 首先通过对常用的特征提取算法的分析、理解和判断,提出了基于物体内部结构的纹理特征算法,并用欧式距离公式求出图像纹理特征向量的相似距离。