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The ash content of rubber was determined by thermogravimetric analysis (TGA) and the effects of sample amount, sample representativeness, heating rate, combustion temperature and combustion atmosphere on the test results were studied and the repeatability and reproducibility of the method were determined. The results showed that the optimal conditions of TGA were sample mass between 10 mg and 20 mg, heating rate of 20 ℃/min or 30 ℃/min, combustion temperature for raw rubber and compounded rubber (or vulcanized rubber) of 550 ℃ and 650 ℃, respectively. The repeatability and reproducibility of TGA were all good. When ash mass fraction of 4 types of different rubbers were from 0.29% to 5.12%, the repeatability within laboratory was from 0.110% to 0.303%, and the reproducibility between laboratories was from 0.283% to 0.676%.

Ternary deep eutectic solvents (DES) comprising choline chloride (ChCl), glycerol (Gly) and ethanolamine (MEA) with different molar ratios were prepared. The CO2 absorption ability of the ternary DES was investigated at room temperature and under atmospheric pressure. Among four ternary DES samples prepared with different molar ratios, a ChCl-Gly-MEA (1:1:10) ternary DES was found to absorb the most CO2 at a capacity of 0.18 g CO2 (DES per gram) at 298 K and 101.3 kPa. The experimental results showed that the CO2 absorption capacity of ChCl-Gly-MEA (1:1:10) ternary DES increased with an increase in gas flow rate and a decrease in water content. The gas flow rate improved the mass transfer efficiency of CO2 in the ternary DES system, and shortened the time required for CO2 absorption to reach equilibrium. However, the addition of water could weaken the hydrogen bonding interaction among the three components in the DES system. Results from Fourier transform infrared (FT-IR) and nuclear magnetic resonance (NMR) spectroscopy indicated that CO2 interacted with the amino groups in DES to form carbamates. The absorption of CO2 by ChCl-Gly-MEA underwent both physical and chemical absorption, and the chemical absorption was significantly enhanced by the addition of MEA. A recovery experiment showed that no obvious loss in CO2 absorption was detected after five absorption/desorption cycles with an absorption rate of 97.3% being retained. [ABSTRACT FROM AUTHOR]

Objective: This study aimed to analyze the peptide composition and evaluate the reproducibility of the soybean oligopeptides. Methods: High performance liquid chromatography tandem high resolution mass spectrometry was employed for peptidomic analysis of the soybean oligopeptides prepared at the same condition at different batches. Generality and individuality of the samples were also discussed based on the heat map analysis and principal component analysis （PCA）. Results: About 1 000 peptides were identified from each of the materials and most of them were short peptides. From the set analysis, 101 peptides were found of detectability from all samples, but there were also many peptides that could be only detected from part of the samples. Moreover, differences between the fifth sample and other samples were evidently observed from the principal component analysis. Conclusion: Though prepared at the same conditions, commonalities and differences coexisted across the samples from different batches. In practical production of oligopeptides, efforts should be made to narrow the differences and increase the commonalities, so that the reproducibility of the products can be improved.

[Purpose/Significance] The biomedical research field is suffering from reproducibility crisis, which has become one of important issues under the background of the rise of the data-intensive research paradigm. As one of the most important attributes of scientific research by empirical data study,reproducibility needs to be improved by good data practices of researchers. How to effectively improve the data literacy of researchers has become the key point to solve the crisis. However, the relevant research is basically in the blank condition. The paper aims to establish a new data literacy education system for reproducibility crisis, in order to fill the current research gap and provide reference for implementing the relevant education in our country. [Method/Process] Firstly, the paper clarifies the relationship between reproducibility crisis and data literacy by using content analysis: the inappropriate data behavior of researchers may bring serious problems in many respects, such as research data, methods, process, environments and results, which could eventually lead to the irreproducible research. Then, we redefine the concept of data literacy education. Secondly, based on the summarization of the existing foreign research results and practice, the paper builds the Reproducibility Data Literacy Education (Re-DLE) system from the perspective of educational goals and content, subjects and objects, teaching methods, implementation strategies, and evaluation. At last, it proposes the necessary guarantee factors for the operation of the system. [Results/Conclusions] The ultimate goal of Re-DLE is to improve research reproducibility, bulid the educational content framework on the theory of data life cycle, and divide the main content into three dimensions: re-data awareness, re-data skills, and re-data ethics, each of which includes some clear educational objectives, subject modules and detailed instructions Medical libraries have a wealth of teaching experience and should become the educational main body for the broader biomedical research community. the establishment of diversified training methods, diversified teaching strategies and evaluation methods, in other words, we need to strengthen the team building of teaching librarians, consolidate the educational resources foundation, promote educational exchanges, and improve the internal and external cooperative system, so as to push forward the building of the Re-DLE system. The research results of this paper not only can be seen as a theoretical breakthrough, but also provide the theory basis for the development and implementation of education. In addition, due to the limitation of methods, the paper can be used as a qualitative research, which still has some problems to be solved. In the future work, we need to build more scientific and effective Re-DLE system by using empirical research methods.

Perovskite solar cells (PSCs) have attracted extensive attentions due to their high-efficiency, simple preparation process and low-cost. The efficiency of the PSCs has increased from 3.8% to 25.7%. So far, more and more studies focus on n-i-p structured PSCs using SnO2 as electron transport layer. However, its process reproducibility is relatively poor, and efficiency is still low. This report conducted a systematic study of planar n-i-p PSCs, mainly including the selection of transparent conductive oxide (TCO) glass, optimization of preparation parameters and the influence of storage conditions on device performance. Experimental results show that these parameters have an important impact on the device performance. At the same time, it was analyzed by scanning electron microscope, X-ray diffraction, absorption spectrum. The devices achieved an average efficiency of 21.85% and a highest efficiency of 23.47% with good reproducibility under the optimal conditions (Indium Tin oxide substrate, PbI2 annealed at 70 ℃ for 1 min, standing time after dropping amine salt solution is less than 5 s, and stored in 4.5% humidity environment). This work provides scientific support for the preparation of high-efficiency and repeatable PSCs.

Objective: To improve the accuracy and validity of the measurement data of solvent residues in food packaging paper. Methods: Taking the HS GC-MS measurement system as the research object, variation sources in the measurement process was separated by using the measurement system analysis, and the traditional control chart and EWMA control chart of repeatability and reproducibility were established respectively to effectively monitor the detection error of the measurement system. Results: ① HS GC/MS had high measurement accuracy, with GRR of about 9.76%, and the gauging ability of the measurement system was relatively good. ② Through the combination of periodic measurement system analysis and control chart method, the effective separation and monitoring of repeatability and reproducibility variance components can be realized. ③ The repeatability can be monitored in real time through the daily gauging data, which was helpful to find the fault of measurement equipment in time and ensure the reliability of gauging results. ④ EWMA chart of repeatability can give early warning of measuring equipment fault faster than traditional control chart. Conclusion: Separating and monitoring variation sources of the measurement system by using variance analysis method can effectively ensure the stability of HS GC-MS equipment and improve the effectiveness of solvent residue detection.

In high-performance computing,the accumulation of rounding error in the process of solving the large-scale,long time and ill-conditioned problem will lead to invalidated results.These results are useful for the developers to debug programs and check their correctness.Therefore,the reproducibility of the numerical results of the algorithm becomes very important.Based on the OpenBLAS’s framework,combining with Demmel’s reproducible method in ReproBLAS and multilayer block technology proposed by Castaldo,this paper designs a reproducible algorithm of multithreaded DGEMV for Phytium processor with rounding error analysis and error free transformation.Numerical experiments show that the output of the algorithm is the same as that of the ReproBLAS,which verifies the reproducibility.Our algorithm is up to 2x faster than that in ReproBLAS.Compared with the DGEMV function of OzBLAS proposed by Mukunoki,our algorithm runs at least 20x faster than that in OzBLAS with single thread,and 9x faster than that in OzBLAS with multi-threads.Theoretical analysis and numerical experiments illustrate that improved algorithm is accurate,validated and efficiency.

Objective To verify the test feasibility of a new portable electrochemical analyzer BA200 (domestic) in measuring the fractional exhale nitric oxide (FeNO)， a marker of airway inflammation. Methods FeNO was tested in 137 patients with airway diseases by using BA200 and NIOX VERO， respectively，and Bland-Altman method was used for consistency analysis. Intraclass correlation coefficient (ICC) method was used for repeatability analysis in other 50 patients with airway disease. ROC curve was used to compare the sensitivity and specificity of the two analyzers in 80 patients with asymptomatic and symptomatic asthma among the 137 patients at different critical values. Results In the consistency study， Bland-Altman analysis on the 3 groups of different levels ［<25×10-9 ，(25-50)×10-9 ，>50×10-9 ］ and the overall sample showed that the 95% of limit of agreement (LoA) for the difference was (-3.239 2- 6.724 4)×10-9 ，(-6.829 0-7.923 4)×10-9 ，(-14.310 1-17.485 9)×10-9 and (-7.922 0-10.704 4)×10-9 ， respectively. Most of the differences were within 95%LoA of the mean value of difference between the two machines. In the repeatability study， the ICC values of BA200 and NIOX VERO were 0.995 3 and 0.996 8， respectively， which were greater than 0.75(P<0.001). In ROC curve analysis， when 49.9×10-9 was used as the cut-off value， the specificity of both machines was equal， and the sensitivity of BA200 was higher than that of NIOX VERO. Conclusion Compared with the classical electrochemical analyzer NIOX VERO， the results of FeNO measured by BA200 have good consistency and repeatability. BA200 can be used as a clinical alternative product of NIOX VERO with good clinical application value. [ABSTRACT FROM AUTHOR]

Copyright of Power Generation Technology is the property of Power Generation Technology Editorial Office and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Food & Machinery is the property of Food & Machinery Editorial Office and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Bearing is the property of Bearing Editorial Office and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Revise ISO 22768∶2017 based on China′s industrial standards, and expand the scope of application to latex. The effects of sample preparation method, gas flow rate, heating rate and sample amount on the determination results of glass transition temperature were investigated, and the precision of the method was established. The results showed that, when the drying method was selected, the gas flow rate was 20 mL/min, the sample amount was 5-20 mg, and the heating rate was 20 ℃/min, the method had good precision, the standard deviation of repeatability was less than 0.30 ℃ and the standard deviation of reproducibility was less than 1.01 ℃.

Objective: To investigate the influence of CT reconstruction algorithm, radiation dose, and contrast agent on the stability of radiomic features of pure ground-glass density pulmonary nodules. Methods: A total of 50 pure ground-glass density pulmonary nodules in 35 patients were prospectively selected from Cancer Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College in 2018. After reconstructing the original image of the same patient's pulmonary nodules, six sequences of different parameters were obtained. ITK-SNAP software was used to segment different sequences of pure ground-glass density pulmonary nodules. All scanning data were extracted by A.K. software. The radiomic features with good retest reliability were selected by the intraclass correlation coefficient. The statistical software of R language was used to analyze the characteristic parameters. All the radiomic feature values of different sequences were paired and compared. The number of radiomic features changed by acquisition and reconstruction parameters was counted. The influence of different parameters on the reproducibility of pure ground-glass density pulmonary nodules was compared. Results: A total of 391 radiomic features were extracted from 50 cases of pure ground-glass density pulmonary nodules. 320 features with an intraclass correlation coefficient greater than 0.75 were selected for further analysis. By changing the three parameters of CT reconstruction algorithm, radiation dose, and contrast agent simultaneously, the changed radiomic features of the pure ground-glass density pulmonary nodules reach 60.9% (195/320), including 6.7% (1/15) morphological feature, 100. 0% (40/40) histogram features, and 58. 1% (154/265) texture features. When only one parameter was changed (keeping the other two parameters unchanged), changing the CT reconstruction algorithm, radiation dose, and contrast agent respectively, the changed radiomic features of pure ground-glass density pulmonary nodules were 10.6% (34/320), 30.9% (99/320) and 50.6% (162/320), the difference was statistically significant (P<0.05). When the radiation dose and contrast agent were changed, the radiomic features obtained by the FBP reconstruction algorithm had smaller changes than the features obtained by the 50% ASiR-V algorithm (P = 0.001). Conclusions CT reconstruction algorithm, radiation dose, and contrast agent will affect the radiomic features of pure ground-glass density pulmonary nodules. The contrast agent has the most significant influence on the radiomic features, followed by radiation dose and CT reconstruction algorithm minimum. Compared with morphological features, histogram features and texture features are more likely to be affected by CT reconstruction algorithms, radiation doses, and contrast agents. Compared with the 50% ASiR-V algorithm, the radiomic features obtained by the FBP reconstruction algorithm are less affected by the radiation dose and contrast agent. The influence of these parameters should be fully considered in the radiomic analysis. [ABSTRACT FROM AUTHOR]

In order to make the carding fiber length can be rapidly and accurately measured, a new instrument version 2. 0 for cashmere and other similar fibers was developed. The instrument consists of sampling and sample preparation device, photoelectric detection device and control computer of three parts. 37 kinds of cashmere and others were tested by the new instrument and compared with the experimental data obtained by the center's manual row test method specified in GB 18267 -- 2013" Cashmere". The results show that the data on the average of length from the new instrument is consistent with that of the hand row method. Then the repeated tests of the 17 kinds of sample prove that the instrument with good reproducibility and stability. Furthermore, when compared with the reproducibility of hand row method, the results indicate that the data from this instrument has small random error and high reliability. The new measuring instrument is suitable for cashmere, rabbit hair, camel hair, yak hair and other common carding wool fiber length of the test. [ABSTRACT FROM AUTHOR]

Copyright of Food & Machinery is the property of Food & Machinery Editorial Office and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Rice processing precision is an important index to evaluate rice quality. In this paper, a new technology for the detection of rice processing precision was studied. The rice samples were dyed by eosin y-methylene blue method, and then placed in the rice processing accuracy tester to determine the degree of leather retention, and then determine the rice processing accuracy level. Through the statistical analysis of the validation results among different laboratories, it was showed that the method has good repeatability, reproducibility, stability in line with the requirements of national standards, and meets the needs of quantitative detection of rice processing accuracy. The repeatability limit R and reproducibility limit r were calculated according to the inter laboratory validation data, and the method was standardized to guide the practical application.

Copyright of Journal of Policy & Complex Systems is the property of Policy Studies Organization and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Objective To assess the repeatability and reproducibility of OCULUS Binoptometer's subjective visual quality in healthy eyes. early age-related cataracts, and cataract surgery with implantation of single-focus intraocular lens, Methods 35 health y eyes (group A).35 age-related early cataract eyes (group B) and 35 (group C) were selected from our hospital from November 2019 to January 2020. The two examiners used the OCULUS Binoptometer's to measure the subjects' full range of vision. contrast sensitivity glare sensitivity and intermediate and stereoscopic vision. The first checker made 3 measurements in a row in one hour interval, and the another checker made 1 measurement in the next day. Repentability and reproducibility were evaluated by intra class correlation coefficient (ICC). coefficient of variation (CV), paired t-test, Results The ICC about full range of vision (5 m.3 m and 1 m.80 cm.67 cm.50 cm.40 cm.33 cm), stereoscopic vision (5 m. 40 cm).contrast sensitivity (0. 40.0. 25 and 0, 16 logo).glare sensitivity and intermediate (no glare-glare) were greater than 0. 8 in group A group B and group C, The CV value is less than 15%. There was no statistically significant difference in the measurement results among the three groups with different inspector. Conclusion OCULUS Binoptometer can reflect the subjective visual quality of human eyes and has good repeatability and repro ducibility. [ABSTRACT FROM AUTHOR]

Copyright of Chinese Journal of Preventive Veterinary Medicine / Zhongguo Yufang Shouyi Xuebao is the property of Chinese Journal of Preventive Veterinary Medicine Editorial Office and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Food Research & Development is the property of Food Research & Development Editorial Department and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

According to the differences of thermal conductivity of different types and specifications of thermal insulation materials, the reproducibility of different thermal conductivity test equipment was tested, and the influence of the average temperature of hot and cold plate, temperature difference between hot and cold plate, laboratory temperature and drying process on the determination of thermal conductivity was studied. Detailed measures for the accuracy and reproducibility of thermal conductivity measurement are proposed. Compared with the experimental results, the optimization effect is obvious. [ABSTRACT FROM AUTHOR]

Copyright of Journal of Food Safety & Quality is the property of Journal of Food Safety & Quality Editorial Department and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

[Objective]The aroma substances in Pu-erh tea were studied by Simultaneous-dist extraction (SDE) previously, however, the reproducibility of these methods were not studied. [Method] In this work, two raw materials and two Pu-erh tea fermented samples were extracted three times by Simultaneous-dist extraction method (SDE), and detected by Gas Chromatography-mass Spectrometry (GC-MS), respectively. [Result]The 64 -82 compounds were detected, and the repetition rate of substance identification were 50.78% -71.30%. The reproducibility (RSD) of peak areas detected in the same samples for three times was 0.76% -70.91%. The main aroma substances in raw materials (R1 and R2) were alcohol with relative contents of 53.3% and 50.0%, respectively. After fermentation, relative levels of heterocyclic compounds, such as 1, 2, 3-trimelhoxy benzene and 3,4,5-trimethoxy benzene were increased. And main aroma substances in fermented samples (PI and P2) were heterocyclic compounds with relative contents of 44. 0% and 41.5%, respectively. [Conclusion] It need to develop more repeats analyses or improve the extraction method in the study of aroma substances of Pu-erh lea using SDE-GC-MS method. [ABSTRACT FROM AUTHOR]

Linear multiplicative congruential method( LMCM) random number generators are widely utilized in car registration lottery. To improve the statistical qualities of the code distribution for purchasing lottery of application and lucky random number sequence, according to the application demand, this paper designed a new linear multiplicative congruential algorithm, which based on the concept of uniformly distribution. In the new algorithm, with the original method of LMCM generator of modulus as the foundation, the random number produced through the same seeds uniform distributed. Due to implementation of the segmentation algorithm, the generation of random numbers would not increase obviously in the amount of calculation, which could satisfy the demands of car registration lottery. Statistical test results show that the proposed algorithm for statistical quality improvement of random sequences is significant. At the same time, the algorithm has been successfully applied to car lottery system in Guiyang specific areas, which show a good application population. Therefore, the method can be as a new random number sampling algorithm. [ABSTRACT FROM AUTHOR]

Copyright of Research of Environmental Sciences is the property of Research of Environmental Sciences Editorial Board and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Twenty healthy college students were selected as subjects. Four kinds of pulse wave sensors (adjustable， pencil probe， wrist-band， and photoelectric)were used to collect radial pulse waves. The influence factors， stability and reproducibility of the four sensors were studied. The results show that photoelectric sensor is susceptible to contact pressure， ambient light and measuring site， and it has medium reproducibility and poor stability; wrist-band pulse sensor is susceptible to measuring site， and its stability and reproducibility are medium; pencil probe sensor is susceptible to measuring site， and its stability and reproducibility are good; adjustable sensor is susceptible to pressure and measuring site， and it has good reproducibility and medium stability. Four kinds of pulse wave sensors have their own performance indexes and application scopes. The pencil probe sensor has less influence factors and better performance indexes. [ABSTRACT FROM AUTHOR]

Objective To study the measurement reproducibility of parameters derived from introvoxel incoherent motion (IVIM) diffusion-weighted imaging (DWI)-MRI of rectal cancer between- and within- radiologists. Methods Clinical data of 34 patients with rectal cancer were prospective analyzed. Conventional MRI sequences, IVIM DWI-MRI with sixteen b values and dynamic contrast enhancement (DCE)-MRI sequences of rectum were acquired by GE 3.0-T MRI imager. The IVIM sequence images with b value=1000 sec/mm2 were selected to measure the maximum axial section of tumor by a radiologist with 15 year-experiences in gastrointestinal cancer imaging.Two radiologists (radiologist 1 and radiologist 2 with 2 and 10 years of experience in gastrointestinal cancer imaging, respectively) independently draw a freehand region of interest (ROI) that contained the largest available tumor area on the selected section. Monoexponential apparent diffusion coefficient (ADC) and biexponential IVIM metrics maps and IVIM parameters were generated automatically by the software. The repeated measurement was performed at an interval of one week. The average values of each measurement were used for statistical analysis. ADC values and IVIM parameters obtained between- and within- radiologists were analyzed by Wilcoxon signed-rank test. Intraclass correlation coefficients (ICC) and Bland-Altaman plots were used to analyze the parameter reproducibility of two measurements between- and within- radiologists. Results The first and second measured ADC (×10-3mm2/s), true diffusivity (D, ×10-3mm2/s), false diffusivity (D*, mm2/s) and perfusion fraction (f, %) by radiologist 1 were 0.997, 0.692, 0.043, 34.6 and 0.993, 0.691, 0.038, 32.8, respectively. The first and second measured ADC (×10-3mm2/s), D (×10-3mm2/s), D* (mm2/s), f (%) by radiologist 2 were 0.987, 0.651, 0.046, 32.8 and 0.996, 0.689、0.041, 32.7, respectively. No statistically significant differences were observed in ADC and IVIM parameters obtained between- and within- radiologists (P>0.05). The ADC values and the f values of two times were significantly correlated between- and within- radiologists. The D values were significantly correlated within a radiologist, and the correlation of D* values within a radiologist was significantly higher than that between radiologists. The 95% limits of agreement (LoA) of ADC values and f values were smaller than those of D values and D* values between- and within- radiologists. The 95% LoA of ADC values was the least, while that of D* values varied most.The 95% LoA of f values and D values kept steady within a radiologist, and 95% LoA of f values was slightly smaller than that of D values. The 95% LoA of IVIM parameters (ADC, D, f, D* values) within radiologists 2 were better than those within radiologist 1. Conclusions The reproducibilities of ADC and f values are the best, while the reproducibility of D* values is relatively poorer in rectal cancer. Measurement reproducibility of parameters derived from IVIM may be improved by increasing radiologists' experiences in drawing ROI. [ABSTRACT FROM AUTHOR]

Natural gas composition analysis is the most basic analysis item in the natural industry. The two indexes of carbon dioxide content and superior calorific value provided in GB 17820 —2012 Natural Gas relate to natural gas composition analysis. The precision requirement of analysis results is an important technical parameter for natural gas composition analysis method. This paper compared the precision of natural gas conventional composition analysis methods at home and abroad, and verified the precision through experiment by using the different analysis methods. The precision reasonability and consistency of the different analysis methods were discussed. The conclusion could provide a reference for the users to choose different methods to analyze natural gas composition. [ABSTRACT FROM AUTHOR]

Copyright of Wool Textile Journal is the property of National Wool Textile Science & Technology Information Center and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Journal of the Tianjin Polytechnic University / Tianjin Gongye Daxue Xuebao is the property of Journal of Tianjin Polytechnic University and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

This paper introduces a set of gas flow standard facilities based on combined turbine flow meters, which is newly built by Chengdu Verification Branch of National Oil and Gas Large Flow Rate Measurement Station, including the process of the standard facilities, testing requirements and results of the metering performance. The standard facilities are used for actual flow verification of the natural gas flow meter and guaranteeing the accuracy and reliability of onsite trade measurement of natural gas. By analyzing the testing data, it has confirmed that the uncertainty of standard test results is better than 0.33%. Both the repeatability and stability of test results meet the verification requirements for gas flow measuring instruments. [ABSTRACT FROM AUTHOR]

[Purpose] To examine the reproducibility of the measured values of the seated continuous dorsiflexion test, a test we designed. [Subjects] There were 16 subjects (1 male, 15 females) in the intra-rater reproducibility test, and 14 (2 males, 12 females) in the inter-rater reproducibility test; all subjects were aged 65 or over. [Methods] Measurements for the intra-rater reproducibility were performed by one examiner on two days separated by two or more days. Measurements for the inter-rater reproducibility were performed by two examiners on each of the subjects. The intra- and inter-rater reproducibilities were assessed using the intra-class correlation coefficients, ICC(1,1) and ICC(2,1), respectively. [Results] For intra-rater reproducibility, ICC(1,1) was 0.915, and for inter-rater reproducibility, ICC(2,1) was 0.932. [Conclusion] The reproducibility of our test was good, and we consider it will be useful in clinical practice as it is easy and safe to perform. [ABSTRACT FROM AUTHOR]

Objective: To investigate the influence of CT reconstruction algorithm, radiation dose, and contrast agent on the stability of radiomic features of pure ground-glass density pulmonary nodules. Methods: A total of 50 pure ground-glass density pulmonary nodules in 35 patients were prospectively selected from Cancer Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College in 2018. After reconstructing the original image of the same patient's pulmonary nodules, six sequences of different parameters were obtained. ITK-SNAP software was used to segment different sequences of pure ground-glass density pulmonary nodules. All scanning data were extracted by A. K. software. The radiomic features with good retest reliability were selected by the intraclass correlation coefficient. The statistical software of R language was used to analyze the characteristic parameters. All the radiomic feature values of different sequences were paired and compared. The number of radiomic features changed by acquisition and reconstruction parameters was counted. The influence of different parameters on the reproducibility of pure ground-glass density pulmonary nodules was compared. Results: A total of 391 radiomic features were extracted from 50 cases of pure ground-glass density pulmonary nodules. 320 features with an intraclass correlation coefficient greater than 0.75 were selected for further analysis. By changing the three parameters of CT reconstruction algorithm, radiation dose, and contrast agent simultaneously, the changed radiomic features of the pure ground-glass density pulmonary nodules reach 60.9% (195/320), including 6.7% (1/15) morphological feature, 100.0% (40/40) histogram features, and 58.1% (154/265) texture features. When only one parameter was changed (keeping the other two parameters unchanged), changing the CT reconstruction algorithm, radiation dose, and contrast agent respectively, the changed radiomic features of pure ground-glass density pulmonary nodules were 10.6% (34/320), 30.9% (99/320) and 50.6% (162/320), the difference was statistically significant ( P <0.05). When the radiation dose and contrast agent were changed, the radiomic features obtained by the FBP reconstruction algorithm had smaller changes than the features obtained by the 50% ASiR-V algorithm ( P =0.001). Conclusions: CT reconstruction algorithm, radiation dose, and contrast agent will affect the radiomic features of pure ground-glass density pulmonary nodules. The contrast agent has the most significant influence on the radiomic features, followed by radiation dose and CT reconstruction algorithm minimum. Compared with morphological features, histogram features and texture features are more likely to be affected by CT reconstruction algorithms, radiation doses, and contrast agents. Compared with the 50% ASiR-V algorithm, the radiomic features obtained by the FBP reconstruction algorithm are less affected by the radiation dose and contrast agent. The influence of these parameters should be fully considered in the radiomic analysis.

[Purpose] We investigated the reproducibility of measurements of spinal curvature using Spinal Mouse on clothed and naked skin. [Subjects] The subjects were 20 healthy men. [Method] We measured spinal curvature using Spinal Mouse on naked skin and one layer of clothing, twice for each condition, and determined the intra-class correlation coefficient (ICC). [Results] The ICC of thoracic kyphosis was 0.974 for the naked condition and 0.892 for the clothed condition. The ICC of lumbar lordosis was 0.939 for the naked condition and 0.883 for the clothed condition. In the comparison of the naked and clothed conditions, no significant differences were found. Furthermore, the measurement difference between the two conditions was of the order of 1.5°, suggesting that when it is difficult to take the measurement on the naked skin, a reliable measurement can be obtained over clothing. [ABSTRACT FROM AUTHOR]

[Purpose] This study examined the inter-rater and intra-rater reliability of measurement of isometric shoulder internal and external rotation strength using a hand-held dynamometer (HDD). [Subjects] For intra-rater reliability, the subjects were 21 healthy persons (8 men and 13 women), and for inter-rater reliability, the subjects were 17 healthy persons (9 men and 8 women). [Method] For intra-rater reliability, an examiner performed measurements of isometric shoulder internal and external rotation strength twice with an interval of two days. For inter-rater reliability, two examiners measured isometric shoulder internal and external rotation strength. Making allowance for fatigue, measurements by different examiners took place after an interval of at least 30 min, and at random on the same day. [Results] The inter-rater and intra-rater reliability were analyzed using Student's t test, which showed no significant differences, and intra-class correlation coefficients, which gave good results. [Conclusion] Measurements of isometric shoulder internal and external rotation strength using a HDD fixed to the upper limbs and trunk by a belt gave good results for both inter-rater and intra-rater reproducibility. [ABSTRACT FROM AUTHOR]

[Purpose] In this study we investigated the reproducibility of the lateral reach test in the sitting position. [Subjects] The subjects were 7 young healthy men, average age: 24.0 ± 3.2 years. [Method] We measured maximum lateral reach of the right side 3 times and determined the angles of the head, shoulder girdle, pelvis and lower thigh. We repeated the measurements 4-7 days later. [Results] The intra-class correlation coefficients (ICC) of lateral reach were 0.679 at the first measurement and 0.858 at the second measurement. Intra-day reproducibility was found, but the inter-day ICC was 0.377 casting doubt on the reproducibility. In the comparison of reach distance, the distance of the second measurement showed a significantly higher value than that of the first. [Conclusion] In the measurements of body angles, the angle of the pelvis at the second measurement was significantly larger than that of the first, suggesting that pelvis angle influences the maximal reach distance. [ABSTRACT FROM AUTHOR]

Objective To investigate the intra-and inter-observer reproducibility of iodine concentrations of abdominal parenchymal organs based on spectral CT.Methods The water-free iodine images of the venous phase were retrospectively obtained from 50 patients with abdominal dynamic spectral CT scans.The iodine concentrations were measured in the left,right and caudate lobes of liver,spleen,pancreas and bilateral kidneys.Intraclass correlation coefficient(ICC)and Bland-Altman plot were employed to analyze the intra-and inter-observer reproducibility.Results The intra-observer ICCs of the left,right and caudate lobes of liver,spleen,pancreas,and left and right kidneys were 0.938(0.894,0.965),0.932(0.884,0.961),0.939(0.895,0.965),0.947(0.909,0.970),0.912(0.851,0.949),0.946(0.906,0.969)and 0.907(0.842,0.946),which indicated good intra-observer reproducibility.The inter-observer ICCs of the left,right and caudate lobes of liver,spleen,pancreas,and left and right kidneys were 0.947(0.909,0.970),0.927(0.875,0.958),0.943(0.902,0.968),0.956(0.924,0.975),0.934(0.887,0.962),0.927(0.875,0.958)and 0.892(0.818,0.937),which indicated good inter-observer reproducibility.Bland-Altman plots presented that more than 95% points of the intra-observer differences located within 95% CI of limits of agreement for the caudate lobe of liver,spleen,pancreas and bilateral kidneys,which was same as inter-observer differences of the caudate lobe of liver,spleen and right kidney.Conclusion The iodine concentration measurement based on the spectral CT presented good intra-and inter-observer reproducibility for the caudate lobe of liver and spleen.

Objective: To investigate the intra- and inter-scanner reproducibility of quantitative susceptibility mapping (QSM) of cerebral subcortical nuclei in healthy adults., Methods: QSM was performed in 21 healthy adults on two different 3.0T MR scanners, and the region of interest (ROI) method was used to measure the magnetic susceptibility value of the left subcortical nuclei (the head of the caudate, putamen, globus pallidus, thalamus, substantia nigra and red nucleus). The intraclass correlation coefficient (ICC) and Bland-Altman method were used to evaluate the inter-scanner and intra-scanner reliability., Results: The ICCs of the susceptibility value ranged from 0.90 to 0.99 for all the subcortical gray nuclei except for the head of the caudate nucleus measured on the same MR scanner by the same observer. Bland-Altman analysis revealed that the points with susceptibility differences for all the subcortical gray nuclei except for substantia nigra located in the 95% CI of limits of agreement for the same MR scanner. The ICCs of the susceptibility value for the inter-scanner was 0.49 (0.08-0.75) for the head of the caudate nuleus, 0.80 (0.57-0.91) for the putamen, 0.77 (0.51-0.90) for the globus pallidus, 0.78 (0.54-0.91) for the thalamus, 0.80 (0.56-0.91) for the substantia nigra and 0.93 (0.83-0.97) for the red nucleus. The points with susceptibility difference (95.2%, 20/21) located in the 95% CI of limits of agreement for the putamen and the thalamus measured on two different MR scanners., Conclusions: The intra-scanner reproducibility of QSM of the subcortical gray nuclei is superior to the inter-scanner reproducibility in healthy adults.

Objective: To study the measurement reproducibility of parameters derived from introvoxel incoherent motion (IVIM) diffusion-weighted imaging (DWI)-MRI of rectal cancer between- and within- radiologists. Methods: Clinical data of 34 patients with rectal cancer were prospective analyzed. Conventional MRI sequences, IVIM DWI-MRI with sixteen b values and dynamic contrast enhancement (DCE)-MRI sequences of rectum were acquired by GE 3.0-T MRI imager. The IVIM sequence images with b value=1000 sec/mm(2) were selected to measure the maximum axial section of tumor by a radiologist with 15 year-experiences in gastrointestinal cancer imaging.Two radiologists (radiologist 1 and radiologist 2 with 2 and 10 years of experience in gastrointestinal cancer imaging, respectively) independently draw a freehand region of interest (ROI) that contained the largest available tumor area on the selected section. Monoexponential apparent diffusion coefficient (ADC) and biexponential IVIM metrics maps and IVIM parameters were generated automatically by the software. The repeated measurement was performed at an interval of one week. The average values of each measurement were used for statistical analysis. ADC values and IVIM parameters obtained between- and within- radiologists were analyzed by Wilcoxon signed-rank test. Intraclass correlation coefficients (ICC) and Bland-Altaman plots were used to analyze the parameter reproducibility of two measurements between- and within- radiologists. Results: The first and second measured ADC (×10(-3)mm(2)/s), true diffusivity (D, ×10(-3)mm(2)/s), false diffusivity (D(*,) mm(2)/s) and perfusion fraction (f, %) by radiologist 1 were 0.997, 0.692, 0.043, 34.6 and 0.993, 0.691, 0.038, 32.8, respectively. The first and second measured ADC (×10(-3)mm(2)/s), D (×10(-3)mm(2)/s), D(*) (mm(2)/s), f (%) by radiologist 2 were 0.987, 0.651, 0.046, 32.8 and 0.996, 0.689、0.041, 32.7, respectively. No statistically significant differences were observed in ADC and IVIM parameters obtained between- and within- radiologists ( P >0.05). The ADC values and the f values of two times were significantly correlated between- and within- radiologists. The D values were significantly correlated within a radiologist, and the correlation of D(*) values within a radiologist was significantly higher than that between radiologists. The 95% limits of agreement (LoA) of ADC values and f values were smaller than those of D values and D(*) values between- and within- radiologists. The 95% LoA of ADC values was the least, while that of D(*) values varied most.The 95% LoA of f values and D values kept steady within a radiologist, and 95% LoA of f values was slightly smaller than that of D values. The 95% LoA of IVIM parameters (ADC, D, f, D(*) values) within radiologists 2 were better than those within radiologist 1. Conclusions: The reproducibilities of ADC and f values are the best, while the reproducibility of D(*) values is relatively poorer in rectal cancer. Measurement reproducibility of parameters derived from IVIM may be improved by increasing radiologists' experiences in drawing ROI.