Innovative approach and method of conjugate-contour construction for Roots rotor by LI Yulong, LIU Ping, SONG Anran

“…Therefore, an innovative approach and method are proposed which is suitable not only for common known but also for current unknown conjugate-contour curves.MethodsThe concepts of engagement-distance as length and engagement-angle as direction of conjugate-vector from the pitch-point to the engagement-point was proposed, the intrinsic logic relation of engagement-distance and engagement-angle was summarized, and then the innovative approaches and methods of conjugate-contour construction were proposed.ResultsThe results show that different conjugate-vector functions uniquely determine different conjugate-contour shapes; different conjugate-contour shapes directly determine different output performance; the innovation of output performance is equivalent to the innovation of conjugate-contour; the engagement-angle is equal to the arc cosine function of the first derivative of engagement-distance to the rotation-angle of pitch-circle; the innovation of the conjugate-contour is equivalent to the innovation of the engagement-distance function. …”
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Quantification of Rifaximin in Tablets by Spectrophotometric Method Ecofriendly in Ultraviolet Region by Ana Carolina Kogawa, Hérida Regina Nunes Salgado

“…It does not have spectrophotometric method ecofriendly in the ultraviolet region described in official compendiums and literature. …”
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Dental age estimation of Omani children using Demirjian's method by S. Al Balushi, W.M. Thomson, L. Al-Harthi

“…Dental age plays a significant role in forensic dentistry, orthodontics and paediatric dentistry, as well as in general diagnosis and treatment planning. Different methods have been developed to determine dental age. …”
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Storage of Text Messages on e-Book Files using Least Significant Bit and Haar Wavelet Method by Muhaimin Hasanudin, Deni Kuswoyo*

“…While the peak discharge using the rational method gets a value that varies in each year of observation from (2003-2017). …”
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Examining the Impact of Fingerprint Vector Size on Similarity Determination and Clustering Performance of a Pattern-Based Similarity Metric by Abdulmalik Shehu Yaro, Filip Maly, Pavel Prazak

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Determine the Correlation Coefficient between the Plethysmographic Variability Index and Pulse Pressure Variation as a Marker for Intravascular Volume Status in Non Laparoscopic Ab... by D Harsha, Amit Singh, Praveen Kumar, Vikram Singh Rathore

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On detection of crack-like welding defects by existing quality control methods by V. A. Peredelsky, V. Y. Harchenko, A. I. Chernogorov, S. V. Tihinov

“…At the same time, regardless of the state of supply, the carbon equivalent Сэкв should not exceed 0.46 %. The research methods are calculation-experimental ones. To calculate the stress-strain state of welded joints, the following methods were used:finite elements (FEM),fracture mechanics using the stress intensity coefficient Kt.Methods of mathematical statistics were used to estimate the geometric dimensions of crack-like welding defects. …”
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Classification and Comparison of Eight Different Growth Curve Methods for Pekin Duck by Hasan Önder, Mine Yılmaz, Mustafa Şahin, Uğur Şen, Sibel Bozkurt, Kadir Erensoy, İsmail Gök, Tolga Tolun, Ahmet Uçar

“…According to the goodness of fit criteria such as mean square prediction error, coefficient of determination, adjusted coefficient of determination, accuracy factor, bias factor, Durbin–Watson value, Akaike Information Criteria, corrected Akaike Information Criteria, Bayesian Information Criteria and standard error of the regression and interpretation of the growth curves and clustering hierarchical 3‐D dendrograms, the Schnute and Richards models, were found to be a suggestible model for 70 days growth of both female and male Pekin ducks, but the Richards model can be more recommendable due to calculation easiness.…”
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Water requirement and crop coefficients of sorghum in Apodi Plateau by João G. A. Lima, José Espínola Sobrinho, José F. de Medeiros, Paula C. Viana, Rudah M. Maniçoba

“…Reference evapotranspiration (ETo) was estimated by the Penman-Monteith method (FAO) and the crop coefficient determined using two methodologies: simple Kc and dual Kc. …”
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Pregabalin and Tranexamic Acid Evaluation by Two Simple and Sensitive Spectrophotometric Methods by Nawab Sher, Nasreen Fatima, Shahnaz Perveen, Farhan Ahmed Siddiqui, Alisha Wafa Sial

“…Excellent recovery in Placebo spiked samples indicated that there is no interference from common excipients. The analytical methods under proposal were successfully applied to determine tranexamic acid and pregabalin in commercial products. t-test and F ratio were evaluated without noticeable difference between the proposed and reference methods.…”
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Analytical versus Metaheuristic Methods to Extract the Photovoltaic Cells and Panel Parameters by Daniel T. Cotfas, Petru A. Cotfas, Mihai P. Oproiu, Paul A. Ostafe

“…The comparison between the widely used analytical method and some of the best metaheuristic algorithms from the algorithm families is made for datasets from the specialized literature, using the following statistical tests: absolute error, root mean square error, and the coefficient of determination. …”
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Evaluation of Data Mining and Artificial Intelligence Methods to Predict Daily Precipitation by Yaseen Ahmed Hamaamin

“…Both AI systems showed acceptable results predicting daily precipitation from observed meteorological parameters with a coefficient of determination (R2) of 0.75 and 0.72 for model calibration of ANN and ANFIS methods, respectively. …”
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Metrological evaluation of methods for control the safety indicators of leukoreduced platelet concentrates by N. S. Nikulina, E. N. Kalinina, E. V. Nozdrina, N. V. Isaeva, T. V. Krivokorytova, E. S. Kormshchikova

“…The CV of the method for determining pH by potentiometric method was 0,4 %. …”
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Сomparative analysis of methods for calculating stamp modules of soil deformation by A. S. Prolygin, A. L. Kalinin, A. S. Aleksandrov, N. P. Aleksandrova

“…Based on this comparison, we made judgments about the significance of differences in the samples.Discussion and conclusions. To determine the deformation modulus of soil and road pavements made of granular materials, a method for calculating the modulus of deformation using a method that assumes a nonlinear dependence of deformations on pressures, described by a second-degree polynomial is recommended.…”
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Apparent diffusion coefficient in the evaluation of cerebral gliomas malignancy by Ignjatović Jelena, Stojanov Dragan, Živković Vladimir, Ljubisavljević Srđan, Stojanović Nebojša, Stefanović Ivan, Benedeto-Stojanov Daniela, Ignjatović Nebojša, Petrović Slađana, Aracki-Trenkić Aleksandra, Radovanović Zoran, Lazović Lazar

“…The aim of this study was to determine whether there is a correlation between apparent diffusion coefficient (ADC) maps of intracranial glial tumors and histopathologic findings and whether ADCs can reliably distinguish lowgrade from high-grade gliomas. …”
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Determining of the Maximum Throughput of Control Valve in Heat Supply Systems by A. B. Sukhotski

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Efficient and Accurate Calibration of Discrete Element Method Parameters for Black Beans by Xuezhen Wang, Qinghang Zhai, Shihao Zhang, Qianwen Li, Hanmi Zhou

“…Discrete element method (DEM) parameters of the BLB were determined by combining the Plackett–Burman Design test, the steepest ascent design test, and the central composite design test. …”
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IMPROVING EFFICIENCY OF THE JET PUMP AT LOW COEFFICIENTS OF EJECTION by A. G. Butenko, S. Yu. Smik

“…The article considers methods of improving the operation of central ejectors at small ejection coefficients.The authors use mathematical simulation approach to study the particularities of kinematic structure of the flow in the mixing chamber of the central ejector operating with low ejection coefficients. …”
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Measurement of Roughness of Internal Surface of Measuring Pipeline in Real Time for Standard Orifice Plates by Bohdan Chaban

“…Methods for measuring the roughness of the internal surface of a measuring pipeline for projected rectilinear sections of a measuring pipeline and for rectilinear sections that are in operation have been determined. …”
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Velocity coefficient of tangential supply of subsonic centripetal turbine by A. A. Kishkin, A. V. Delkov, Yu. N. Shevchenko, M. U. Abdullaev

“…This work is devoted to the theoretical substantiation and method of experimental determination of the coefficient in the range of geometric and regime parameters of the tangential supply of a subsonic centripetal turbine.…”
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