And the interactive influence of the coaxial diffraction wave components during reconstruction can be eliminated completely by phase - shifting method . this in - line phase - shifting digital holography has been applied to three dimensional microscopy , non - contact measurement , pattern recognition and surface contouring 这种同轴相移数字全息技术，可以广泛应用于小尺度三维形貌的快速测量、数字无损干涉计量、图像识别、显微成像等领域。
Through theoretical analysis on the behavior of soil - water - system dielectrics , it is proved that the real parts of the dielectric constant under high frequency or microwave can be used to measure soil water content rapidly this method can get a lot of measurement results with high accuracy and wide applicabiiity in addition , the results are seidom affected by the spatiai variation of soil property as a further application of the above result , a soil moisture sensor based on standing wave ratio was developed 概括起来本文的研究内容主要有以下几点： 1本文通过对土壤介电特性的理论分析，论证了利用高频或微波段内的介电常数实部来快速测量土壤含水量是一种灵敏度高、适应面宽、受土壤理化特性空间变异影响较小的快速测量方法。为研制开发基于驻波率原理的swr型土壤水分传感器奠定了基础。
As result , a new method is presented by using the acoustic emission ( ae ) signal from stem of individual plant as its demand information . based on virtual instruments technique , which is becoming a popular tool in measurement and automation fields international , a computer - based detecting system is developed for the fast , real - time measurement . take tomato crops for testing example in greenhouse , the relation between ae and transpiration , environmental factors has been studied 因此，从植物本身出发，本文在国内首次采用了以植株茎部声发射信号作为农作物需水信息的新方法，运用目前在测控领域国际流行的虚拟仪器技术，建立了对作物植株茎部声发射信息进行实时、快速测量的微机检测系统，并以温室盆栽番茄为对象，研究了声发射信息同植物蒸腾以及环境因子间的关系。
In this dissertation the primary principle of transformer ' s dc resistance measurement and all kinds of rapid measuring methods is studied , emulated and analyzed by simulink , their advantage and disadvantage is analyzed and their on - site applicability is compared . then one feasible measuring method is brought forward and the aim to rapidly measure transformer ' s dc resistance is implemented through system design using singlechip . wang liang ( electric power system automatization ) directed by prof 本论文主要研究了电力变压器直流电阻测量的基本原理和各种快速测量的方法，用simulink对各种测量方法进行仿真分析,分析了其优缺点及现场适用性，进而提出了一种切实可行的测量方法，并且利用单片机进行系统设计实现电力变压器直流电阻快速测量的目的。
Measurement accuracy of phase - shift laser range finders is up to millimeter level in large range through multi - frequency modulation and high precision phase difference measurement . however , laser range finders existing is not suitable for large range high speed tracing measurement for their complex multi - frequency modulation circuit and conflict between precision and speed in phase - shift measurement . in order to improve the large range measurement speed and accuracy , key technologies on multi - frequency modulation and high precision phase - shift measurement are deeply researched in this paper 相位法激光测距采用多频调制和高精度的相差测量技术可以在大范围内实现毫米甚至更高精度的测量,但现有的测量装置由于存在多频调制电路复杂和没有很好的解决相差测量的高精度和快速测量之间的矛盾问题,使得相位法激光测距很难应用于大范围目标快速的跟踪测量。
The method and principle for rapid measuring soil water content were also studied and swr was developed for soil content . the results showed that soil water content had different layers in vertical direction , and with the increase of soil depth the soil water increased first and then decreased . the results have showed the great value of academic and practicality 研究了土壤水分快速测量方法及测量原理，并用swr型土壤水分测试仪进行了试验，试验表明，土壤水分在农m平面卜的分有存在差异；在截面卜的分布存在分层现象，口人sit深度的增加，上壤含水率先增加后逐渐减少的。试验结果具有较强的研究与实用价值。
As part of the nationa1 " 9 ' 5 " key project ( no . f 96 - a23 - 02 - 010 ) on instrumentation supported by the ministry of science & technology ministry this study took the behavior of soil - water - system dielectrics as a key point for further development and evaiuation of a new kind of standing wave ratio ( swr ) soil moistufe measuring system . a series of academic analysis and a lot of experiment research on swr4ased soil moisture sensor were catried out and presented in this paper . on the basis of the research , a new soil moisture sensof , which it is very suitab1e for field use , was developed 本文在国家科技部“九五”仪器仪表攻关项目的资助下(专题号： 96 - a23 - 02 - 010 ) ，以土壤介电特性为研究的锲入点，对基于驻波率原理( standingwaveratio ? swr )的土壤水分快速测量方法做了系统的理论分析和深入的性能分析研究，为研究开发成功swr型土壤水分测量传感器奠定了基础，同时研制出与全球定位系统( gps )联合使用的土壤水分空间分布速测仪样机。
( 3 ) a new method was developed to measure the sizes of bubbles in vertical pipeline . a rapid and simple filling algorithm was presented acorrding to bubble features . a new method was developed for bubble velocity by searching the united character ( 3 )本文基于数字图像处理技术，提出了一种用于快速测量垂直管道中气液两相流气泡尺寸的新方法，根据气泡特征提出了一种快速简单的气摘要泡填充算法;设计了一种通过搜索气泡的联合特征量来测量气液两相流中气泡速度的新方法，图像处理速度约为19帧/秒。
