MEASUREMENT OF INTERNAL STRESSES OF METAL MULTILAYER COMPOSITE COATINGS

The principle, formula and determination of internal stresses of metal multilayer composite coatings by means of the bending strip method were studied. Using this method, internal stresses of ion-plated metal multilayer composite coatings and thick monolayer coating of aluminium bronze, stainless steel and nickel-iron alloy were determined. The reason of decrement in internal stresses of multilayer composite coatings was discussed.

Bessel-beam-based side-view measurement of seven-core fibre internal core distribution

Accurate knowledge of the internal core distribution of multicore fibres(MCFs)is essential,given their widespread application,including in fibre splicing,bundle fan-in/fan-out,mode coupling,writing gratings,and fibre drawing.However,the extensive use of MCFs is restricted by the limited methods available to precisely measure the fibre core distribution,as the measurement accuracy determines the performance of the product.In this study,a side-view and nondestructive scheme based on Bessel beam illumination was proposed for measuring the internal core distribution of a seven-core fibre.Bessel beams offer a large focal length in a scattering medium,and exhibit a unique pattern when propagating in an off-axis medium with a spatially varying refractive index.The results revealed that a long focal length and unique pattern influence the image contrast in the case of Bessel beams,which differs from a typical Gaussian beam.Further,high-precision measurement of a seven-core fibre core distribution based on a Bessel beam was demonstrated using a digital correlation method.A deep learning approach was used to improve the measurement precision to 0.2°with an accuracy of 96.8%.The proposed side-view Bessel-beam-based method has the potential to handle more complex MCFs and photonic crystal fibres.

A Novel Method for Resolving and Completing Authors' Country Affiliation Data in Bibliographic Records

Purpose: Our work seeks to overcome data quality issues related to incomplete author affiliation data in bibliographic records in order to support accurate and reliable measurement of international research collaboration(IRC).Design/methodology/approch: We propose, implement, and evaluate a method that leverages the Web-based knowledge graph Wikidata to resolve publication affiliation data to particular countries. The method is tested with general and domain-specific data sets.Findings: Our evaluation covers the magnitude of improvement, accuracy, and consistency. Results suggest the method is beneficial, reliable, and consistent, and thus a viable and improved approach to measuring IRC.Research limitations: Though our evaluation suggests the method works with both general and domain-specific bibliographic data sets, it may perform differently with data sets not tested here. Further limitations stem from the use of the R programming language and R libraries for country identification as well as imbalanced data coverage and quality in Wikidata that may also change over time.Practical implications: The new method helps to increase the accuracy in IRC studies and provides a basis for further development into a general tool that enriches bibliographic data using the Wikidata knowledge graph.Originality: This is the first attempt to enrich bibliographic data using a peer-produced, Webbased knowledge graph like Wikidata.

An Accuracy Improvement for the Clinical Test Result by United ISO-GUM and QE

This research developed the technology which united ISO-GUM （International Organization of Standard-Guide to Express of Uncertainty in Measurement） and QE （Quality Engineer） strategically and employed both feature efficiently. Although to tow technology of purpose use is same, each has future. The purpose is scheduled to improve the accuracy as a result of the clinical examinations. The result of research was used for diagnosis by equivalent Quality Control （eqQC） of the same level when and where, that are needed for broader-based medical system of the time of IT-era. Since National Institute of Standard and Technology （NIST） is recommend use of complicated operation by ISO-GUM for uniting, realization required the newest high quality computer technology. The algorithm of the complexity system of operation is that Fast Fourier Transform （FFT）, Inverse Fast Fourier Transform （IFFT） and Multi-variance Analysis （MA） are needed in Fig. 4. The main new improving points are changed of ambiguous expression method of data, and the pursuit which the cause of worsens accuracy put into data. All data with an assurance reported the final result for patient or donor. Medical laboratory quality system service is offered essential in the laboratory to be correct result for health care by Good Laboratory Practices （GLP） useful ISO 15189. Quality Assurance （QA） is achieved though system reliability.

Experimental Investigation of the Internal Flow Field of Rotating Impeller Passage with Inlet Box

Using PDA and its measurement system, the flow fields at the different peripheral locations of rotating impeller passage of a diagonal fan with inlet box are measured. The results are compared with the flow field of the rotating impeller passage of the same fan without inlet box. The differences of the flow characteristics of the rotating passage at the different peripheral locations are revealed. The effects of the complex flow in the inlet box on the internal flow of the rotating impell passage are investigated.

Observation of tiny polarization rotation rate in total internal reflection via weak measurements

In this paper,we examine the tiny polarization rotation effect in total internal reflection due to the spin–orbit interaction of light.We find that the tiny polarization rotation rate will induce a geometric phase gradient,which can be regarded as the physical origin of photonic spin Hall effect.We demonstrate that the spin-dependent splitting in position space is related to the polarization rotation in momentum space,while the spin-dependent splitting in momentum space is attributed to the polarization rotation in position space.Furthermore,we introduce a quantum weak measurement to determine the tiny polarization rotation rate.The rotation rate in momentum space is obtained with 118 nm,which manifests itself as a spatial shift,and the rotation rate in position space is achieved with 38 μrad∕λ,which manifests itself as an angular shift.The investigation of the polarization rotation characteristics will provide insights into the photonic spin Hall effect and will enable us to better understand the spin–orbit interaction of light.

THE FOURTH INTERNATIONAL SYMPOSIUM ON REFINED FLOW MODELLING AND TURBULENCE MEASUREMENTS

The Fourth International Symposium on Refined Flow Modelling and TurbulenceMeasurements organized by International Association for Hydraulic Research(IAHR),and co-sponsored by a group of Chinese Institutes headed by Wuhan University ofHydraulic & Eiectric Engineering and Chinese Institute of Water Conservancy andHydroelectric Power Research is to be held on September 20-23,1990 at Wuhan City,People’s Republic of China.The Symposium is intended for presentation discussion and exchange of viewsbetween international colleagues on a wide scope of frontier problems regardingrefined flow modelling and turbulence measurements.The main topics are: