The output frequency stability (re-speet to input) is 3.3×10~(10)/ms and 5×10~(-13)/s respectively. It is a very good heterodyne source for the dual mixer time difference (DMTD) system and frequency measuring system using beat period method.
The stability of the output frequency (respect to input) is 3.3×10~(-10)/ms and 5×10~(-13)/s respectively. It is a very good heterodyne source for the dual mixer time difference (DMTD) system and frequency measurement system using beat period method.
According to the special requirements of model experiment for navigation engineering,this paper expatiates the importance and investigation of propeller flow meter in measurement of unsteady flow′s velocity through unsteady flow model experiment,and describes the principle,working system,error analysis and main technical indices of period method used for measuring "moment" flow velocity,and the application of Model HD-4B computer flow-meter for model experiment of navigation engineering in the Three Gorges project.
Some experimental results on the reactivity effects produced by Gd_2o_3-UO_2 Poison rods measured in a light water zero power experiment with homogeneous lattice distribution by using periodic method as well as pulsed source method are given.
The article puts forward the periodic method to test and analyse low velocity crawling parameter of the machine tool and it designs a testing,analysing and processing system whose basic component is a set of linear grating displacement sensor attached by interfacing circuit and a microcomputer. Thus data acquisition. analysis and processing are combined in the method.
The article raises two methods of testing stick-slip motion parameter of a machine tool at a lowvelocity. displacement method and periodic method and verifies the necessity and correctness in using periodicmethod to measure the stick-slip motion parameter of a machine tool.
This paper presents the structure of software and hardware of a computer aided test system for dynamic characteristics of digital electronic speed regulators a pplicable for the transient operating conditions of diesel engines and the principal of testing the instantaneous speed of diesel engines using periodic method.
T Without any auxiliary heating source, the core is heated by means of main helium circulator and nuclear power no more than 500kW and temperature coefficient of HTR-10 has been measured. Reactivity change caused by temperature rise from 45.48℃ to 236.93℃ is obtained with cycle method.
Basing on practical experiences,the authors summarize three methods for information management system development,that is life cycle method,prototype method,and comprehensive method. Use these three methods to ensure the best effects with lower cost and improve informatization level and strengthen competitive capability.
A new met hod with DST test cycles on a non flowing well is presented ,definedas“cyclemethod”,and is conipared with Correa method Peres method for DST interpretation modeland Horner method for conventional interpretation model. On the basis of large amount ofsuch data with cycle method,the effect of preceeding test cycle and shut-in afterflow on theinterpretation resuIts is discussed. It shows that the conventional method can not satisfy theactuaI testing condition。
Aiming at the low test precision of analog flux sensor,the flow test device based on the output of impulse is empoldered,which is made up of the high precision raster sensor and the low friction measure cylinder . The test software of frequency and cycle method is developed in this paper,which combines the test frequency method with the test cycle method to adapt to the wide scope hydrometry.
Methods:118 cases firstly treated with herbs,combination of the syndrome differ treatment and a cure about herbs regulating menstrual cycle,at the same time,according to monitoring many ovulation targets,selectively added with E2,P,CC,HCG,HMG,BCT,Diane-35,spironolactone and so on.
Investigation of the integral surface is reduced to numerical solution of a periodic boundary value problem of a certain auxiliary system of differential equations and to calculation of quasi-steady-state rotations by the two-cycle method.
The average cyclic times of the slotted multiple access systems are analyzed by using the average cycle method.
Even though no significant difference in column loading was found between the two procedures, the open cycle method gave rise to more efficient and selective chiral columns.
The postfusion oscillation cycle method of electrofused cells was applied to red blood cell membranes to induce repetitive membrane ruptures and test the mechanical membrane resistance against sequential events of membrane strain and rupture.
A simple life-cycle method for predicting extreme shoreline erosion