Venturi measurement of fluid flow by means of pressure differential devices inserted in circular cross - section conduits running full - part 4 : venturi tubes 用插入满载的圆截面管道中的压差装置测量流体流量.第4部分:文杜利
Conduits and fittings for electrical installations . circular cross - section , insulating , pliable , deformable , self - recovering conduits . types icd and ict 电气装置用导管和接头. icd和ict型柔韧的可变形的自恢复的绝缘的圆截面导管
Measurement of fluid flow in closed conduits - flowrate measurement by means of vortex shedding flowmeters inserted in circular cross - section conduits running full 封闭管道中液体流量的测量.在圆形截面导管中插入涡流流量计来测量流率
Conduits and fittings for electrical installations . circular cross - section , insulationg , plain , rigid , non - threadable , non - flame propagating conduits . type iro 电气装置用导管和接头. iro型阻燃的刚性的光滑的不带螺纹的绝缘的圆截面导管
Venturi measurement of fluid flow by means of pressure differential devices inserted in circular cross - section conduits running full - part 3 : nozzles and venturi nozzles 用插入满载的圆截面管道中的压差装置测量流体流量.第3部分:喷嘴和文杜利
Measurement of fluid flow by means of pressure differential devices inserted in circular cross - section conduits running full - part 1 : general principles and requirements 用插入满载的圆截面管道中的压差装置测量流体流量.第1部分:一般原理和要求
Measurement of fluid flow by means of pressure differential devices inserted in circular cross - section conduits running full - part 2 : orifice plates iso 5167 - 2 : 2003 ; german version en iso 5167 - 2 : 2003 用插入圆截面管道中的压差装置测量流体流量.第2部分
Measurement of fluid flow by means of pressure differential devices inserted in circular cross - section conduits running full - part 4 : venturi tubes iso 5167 - 4 : 2003 ; german versions en iso 5167 - 4 : 2003 用插入圆截面管道中的压差装置测量流体流量.第4部分
Conduits and fittings for electrical installations . circular cross - section , metal , plain , rigid , very heavy , threadable and non - threadable , non - flame propagating conduits - type mrb 电气装置用导管和接头. mrb型阻燃的带螺纹和无螺纹超重型刚性的光滑的金属圆截面导管
On the premise of summarizing former contributions in the field , and considering the universality of the cylindrical space with circular cross - section in industry , the author develop a novel ofpt structure , on which the design theories , numerical simulation , design of experimental system for plane structure , preliminary experiment and design of applied space structure are presented . the main contents of the thesis are that : put forward the novel ofpt pixel distribution and plane - light - path design theories and their empirical formulae . the numbers of the ofs units and their emitting rays can be decided by the requirements of image - reconstructed resolution and the size of the center unmeasured region 本论文在总结前人工作的前提下，充分兼顾了工业中具有圆形截面的圆柱形容器或管道普遍存在的事实，提出了一种新型的光纤过程层析成像结构，并从理论设计方法，具体结构仿真，平面结构实验系统设计，初步实验以及空间结构实用化设计、理论分析等方面进行了研究，主要的创新点在于：提出了一种用于工业过程监测与控制的新型光纤过程层析成像结构设计方法，并推导了该方法的经验公式，该方法主要包括像素分配和平面光路结构设计，可以根据工程应用中图像重建的分辨率和圆形截面非测量区域所占比例的要求，设计所需传感单元的数目和传感单元发射光线的数目；设计了一种新型的光纤过程层析成像结构，并对该结构进行了可行性分析和数值仿真。
