P u r p o s e
To understand XRD and analysis JCPDS card, we analyzed and studied the figure of XRD and did research and discuss background knowledge. Also we expect that we can find important information of XRD by doing experiment
Process of experiment
XRD is equipment that use characteristic X-rays. Through characteristic X-rays diffraction peak of material, we can examine closely unk
3. Experiment Method
A measurement method of sample of powder form is an x-ray diffractometor(Fig. 9).
Fig. 9. An x-ray diffractometer.
3.1. Making of Sample Powder
A Sample is made a powder form. A diameter of powder has good reproducibility as smaller. But generally 10~35μm is a suitable size of sample. We must caution a deterioration by air, gas, humidity and pouri
so the error can be occur
- The thickness of the specimen may differ from figures given to us.
- Discontinuity in the interior of the specimen and coarse particles such as microscopic defects can be causing of the error
- If the probes isn't completely stick to specimen, due to defect of couplement, the error must be occur
errors. Finally she gets crash-shutters
open to reveal...
CLOUD STRATA sweeping up past the windscreen like floor-lights
on a dropping elevator. Were shedding big altitude.
INT. NAV-BAY - MAIN CABIN
OWENS
... crisis program selected Number Two of
this system because it shows at least some
oxygen and more than 1,500 -- would you
SHUT THE FUCK UP!
(hammers a button,
SILENCES ALARMS)
-- more than 1,
시간과 공간에 따라 급격하게 변화하는 난류유동에 적용하기 위해서는 계측오차가 적고 효율적인 속도취득algorithm의 개발과 더불어 난류 통계치를 구하는 데 들어가는 계산시간을 줄이려는 노력이 필요하다. 속도장 계측 결과에 들어 있는 error vector elimination routine도 속도벡터 추출과정에 포함된다.