Comparative Study on Flow Condensation Heat Transfer Characteristics of R410A and R134a inside the Horizontal Smooth Tube

Condensation experiment was operated on the in-tube condensation heat transfer test rig,to study the condensation heat transfer characteristics of R410A and R134a inside the horizontal smooth tube.The heat transfer coefficient and pressure drop were selected as evaluation indexes,and the mass flux,condensation temperature,water-testing Re,diameter,and refrigerant properties were chosen as the influencing factors.The experimental result showed that:the […]

Grey Correlation Method in Correlation Determination in Quality House and Its Application

This paper proposes a method to study the correlation between customer demand and engineering characteristic in quality house based in grey correlation. It uses absolute grey correlation analysis in generalized grey correlation analysis for further analysis. It gets the importance matrix of initial customer demand degree and engineering characteristics by experts, customers and vendors comprehensive […]

Correlation between Xisha Environmental Test and Laboratory Environmental Test of Electronic Equipment Potting Material

Objective To study on the correlation between potting materials such as 267 silicone, DC160 silicone, 112FR epoxy resin and 8836 polyurethanein Xisha ocean atmospheric environment and laboratory environmental test. Methods Exposure test under shed was carried for 267 silicone, etc four potting materials in Xisha sea environment for 3 years, while damp heat test was […]

Correlation of serum sICAM-1 and sVCAM-1 levels with severity of and prognosis of thyroid-associated ophthalmopathy

AIM:To analyze the correlation between levels of serum soluble intercellular adhesion molecule-1(sICAM-1),soluble vascular cell adhesion molecule-1(sVCAM-1)and the severity of thyroidassociated ophthalmopathy(TAO).METHODS:A total of 120 patients with TAO admitted to the hospital from August 2016 to March 2018 were selected and included in the study.According to the clinical activity score(CAS),the patients were divided into active stage […]

Experimental Investigation on Heat Transfer Characteristic of Saturated Boiling in Round Tube

An experiment on saturated heat transfer characteristic in round channel was carried on using water. The dimension of round tube is φ9.5 mm×1 mm with a 1000 mm heating length. The dimensionless Relo number and Bo number were used as important parameters to predict heat transfer coefficient in round channel. Based on the two dimensionless […]

Anti-jamming tracking method of the radar/infrared compound seeker

For resisting the strong noise jamming,chaff jamming and infrared decoy jamming,this paper puts forward the radar/infrared dual-mode seeker cooperative anti-jamming tracking method. Judge the jamming and then select the proper seek operating mode to track the target by detection of the information correlation for the seeker and comparison of information variance. The simulation result shows […]

Correlation between Marine Atmospheric Environmental Test and Laboratory Environmental Test of Aircraft Surface Coating

Objective To study the correlation between surface airborne environmental tests in the South China Sea and la-boratory environmental tests for five types of typical aircraft. Method The outdoor exposure tests of five types of typical aircraft surface substrates and coatings were conducted in South China Sea environment for three years. At the same time, solar […]

Distribution of oral Streptococcus mutans and its correlation with dental caries in children of Bortala Mongo-lian Autonomous Prefecture

Objective To study the detection rate of Streptococcus mutans in oral cavities of 3-5-year-old Han,Uygur and Mongolian children in Bortala Mongolian Autonomous Prefecture,and the correlation between genotype and dental caries of preschool children.Methods Ninety children were randomly selected from the sample bank of chil-dren′s oral epidemiological survey data in the Bozhou area of Xinjiang.Forty-five children […]

Exploring the Correlation between Serum Uric Acid Level and Hypertension in Civil Aviation Pilots

Objective To analyze the correlation between serum uric acid level and hypertension in civil aviation pilots.Methods The research object was 1 500 cases of flight personnel of an airline.The collection time was from January 2013 to December 2018.It was used as the observation group,and 1 500 healthy people from the center of the same period […]

Association Between Heart Rate and Mortality in Elderly Chinese

Objectives:To assess the associations between heart rate(HR)with all-cause,cardiovascular and non-cardiovascular mortality in elderly Chinese aged≥60 years old.Methods:Data from present study were derived from the prospective urban and rural epidemiology study in China(PURE-China).HR was measured at the baseline by trained health workers using digital sphygmomanometers.Cardiovascular mortality,non-cardiovascular mortality,and all-cause mortality events were collected through standardized case reports […]