超高效液相色谱-三重四极杆串联质谱法同时 测定植物油中4种维生素E异构体Simultaneous determination of four vitamin E isomers in vegetable oil by ultra-high performance liquid chromatography- triple quadrupole... by 李彩玲1，张见1,2，刘元法1,3，王晓超1，梅东旭1 LI Cailing1, ZHANG Jian1,2, LIU Yuanfa1,3, WANG Xiaochao1, MEI Dongxu1

“…To improve the detection efficiency of four vitamin E isomers (α-, β-, γ-, δ - tocopherol) in vegetable oil, a method for simultaneous determination of the content of four vitamin E isomers (α-, β-, γ-, δ - tocopherol) in vegetable oil by ultra-high performance liquid chromatography-triple quadrupole tandem mass spectrometry (UPLC-MS/MS) was established. …”
Get full text

In-Silico Investigation of Photovoltaic Performance of MgXS3 (X = Ti and Zr) Chalcogenide Perovskites Compounds by M.A. Olopade, O.O. Oyebola, R.O. Balogun, A.D. Adewoyin, A.B. Adegboyega

Get full text

An Advection Scheme using Paired Explicit Runge-Kutta Time Integration for Atmospheric Modeling by Zhaoyang SUN, Chungang CHEN, Xingliang LI, Xueshun SHEN

“…In this paper， a new numerical scheme was proposed to solve the advection equation in a multi-moment nonhydrostatic dynamical core.To guarantee the shape-preserving property， the limiting operations are devised for a hybrid discretization framework adopted by the multi-moment dynamical core， consisting of the multi-moment finite-volume and the conservative finite-difference schemes for the horizontal and vertical discretizations respectively.In the horizontal direction， a nonoscillaory scheme is accomplished by adjusting the slope of the multi-moment reconstruction polynomial at the cell center with the application of a WENO （weighted essentially non-oscillatory） algorithm.The resulting multi-moment scheme can achieve the fourth-order accuracy in the convergence test.In the vertical direction， a TVD （total variation diminishing） slope limiter is applied in the finite-difference discretization to remove the non-physical oscillations around the discontinuities.To accomplish the time marching in the proposed advection model， a second-order paired explicit Runge-Kutta scheme is adopted， which is expected to be an efficient and practical method for the advection solvers in the atmospheric models with very high spatial resolutions.The explicit time marching， without the dimension splitting， is useful to avoid the divergence errors in the advection transport calculations.Two Runge-Kutta schemes， requiring different times of conducting the spatial discretization within a time step， are combined， and used for the time marching in the different directions.The finite-difference discretization is called for six times within a time step in order to increase the maximum available CFL （Courant-Friedrichs-Lewy） number in the vertical direction， while the horizontal multi-moment spatial discretization is conducted for two times as the regular second-order schemes.As a result， the difference between the maximum time steps determined by the horizontal and vertical discretizations， due to the very large aspect ratio of the computational cells in atmospheric modeling， can be diminished.The non-negativity property of the proposed advection scheme is assured by devising a new flux-correction algorithm.It improves the existing positivity-preserving algorithm through further considering the mass flowing into the computational cell in an iterative procedure during the flux-correction operations.The proposed flux-correction algorithm can approach the necessary and sufficient condition for assuring the non-negative solutions and is more accurate for the advection calculations with CFL numbers larger than one.The widely used two-dimensional benchmark tests were checked in this study and the numerical results verified the performance the proposed advection scheme， which has the practical potential to build an accurate and efficient advection equation solver for the scalable high-resolution nonhydrostatic atmospheric models.…”
Get full text

ORGANIZATION OF CAREER GUIDANCE AT THE UNIVERSITY by Boris V. Zalivanskiy, Elena V. Samokhvalova

Get full text

MODELING AND ANALYSIS OF DYNAMICS IN BEARING SYSTEM OF DRILLING, MILLING AND BORING MACHINE WITH MONO-COLUMN by Yu. V. Vasilevich, S. S. Dovnar, A. S. Truskovsky, I. I. Shumsky

Get full text

Calculating permissible deviations of vibration accelerations of printed circuit assemblies by simulation modeling by V. K. Bityukov, A. V. Dolmatov, A. A. Zadernovsky, A. I. Starikovsky, R. M. Uvaysov

“…The results of comparing the measured values with the calculated tolerance enabled conclusions to be made with regard to the possibility of detecting PCA defects.Conclusions. Using this method of calculating tolerances for the PCA vibration acceleration amplitude allows the presence of defects in REM that do not affect the electrical or thermal characteristics of REM to be determined, thus increasing the efficiency of technical condition control.…”
Get full text

multi-objective mathematical model for optimizing the collection and recycling of urban waste under conditions of uncertainty(The subject of study : Karaj city) by Mohsen Bijanpoor, Reza Ehtesham Rasi, Davood Gharakhany

“…The Lagrange release solution method can be used as a suitable method to reduce problem-solving time. …”
Get full text

IMPROVING THE ORGANIZATION OF PASSENGER SERVICE ON THE ROUTE BY USING BUSES OF DIFFERENT CAPACITY by I. M. Ryabovbov, R. Ya. Kashmanov

“…In order to optimize the transportation process, the authors used the method of determining the buses’ number by hour of the day on the base of the graph-analytical method. …”
Get full text

Transverse Electric Inverse Scattering of Conductors Using Artificial Intelligence by Chien-Ching Chiu, Po-Hsiang Chen, Yen-Chen Chang, Hao Jiang

“…They are widely used in fields like industrial automation, smart homes, medical devices, automotive electronics, and the Internet of Things (IoT), enabling real-time data collection to enhance system intelligence and efficiency. With advancements in technology, sensors are evolving toward miniaturization, high sensitivity, and multifunctional integration. …”
Get full text

Projection Group Decision-making Model of Water Conservancy Project Emergency Plans Based on Interval Intuitionistic Fuzzy Information by CAO Xiongfeng, XIE Wenjing, FENG Jiwei

“…To deal with the group decision-making of emergency plans more accurately and efficiently,this paper proposes a group decision-making model of emergency plans based on interval intuitionistic fuzzy information and projection method,since the decision information with zero value in the aggregation operators will get inaccurate results.First,the interval intuitionistic fuzzy set theory and projection method are utilized to build a multi-objective optimization model to solve the optimal aggregation information of the group.Then,the interval intuitionistic fuzzy entropy is adopted to determine the attribute weight of the index,and the closeness based on the project projection is employed to determine the optimal plan.Finally,the effectiveness of the decision-making model is verified by case analysis.The research results show that the social impact of disasters and the aftermath treatment play an important role in emergency decision-making;the projection decision-making model improves the accuracy and efficiency of the decision-making process and has good applicability and generalization.…”
Get full text

Theoretical Model for Circular Concrete-Filled Steel Tubes Reinforced with Latticed Steel Angles Under Eccentric Loading by Zhongpei Li, Jun Wang

“…Previous experimental studies have demonstrated that the incorporation of steel angles substantially improves both the axial capacity and ductility of CFST-LSA columns. Existing methods for determining the eccentric bearing capacity of CFST-LSA columns primarily rely on the normalized <i>N</i>/<i>N</i>_u-<i>M</i>/<i>M</i>_u interaction curve. …”
Get full text

Comparison of normal and reverse phase column in phytosterol detection by high performance liquid chromatography (HPLC) by RUAN Huina, LIU Songbai

“…In addition, phytosterols were much more soluble in the eluent of the normal phase system.It is concluded that the normal phase column is more suitable than reverse one for quantification of total phytosterols despite of lower separation ability. Furthermore, an efficient method for quantification of phytosterols employing the normal phase column and the benzoate internal standard is developed.…”
Get full text

A CRITIC-CODAS Approach for Ranking WirelessCommunication Technologies in Precision Agriculture: Application to Irrigation System by Khadeejah Adebisi Abdulsalam, Damilare Babatunde, John Adebisi, Olubayo Babatunde

“…The CRITIC method is used to objectively determine criteria weights, with data rate, latency, and battery life emerging as the most important factors. 5G ranks highest with its superior data rate and device density, but its high-power needs may limit suitability for remote agriculture. …”
Get full text

Prediction and optimization of hardness in AlSi10Mg alloy produced by laser powder bed fusion using statistical and machine learning approaches by İnayet Burcu Toprak

“…Among the models, SVM achieved the highest coefficient of determination (R2 = 0.73). This study highlights the importance of integrating Machine Learning and statistical analysis methods for the effective modeling and optimization of LPBF processes. …”
Get full text

Sustainable reuse of oil and gas wells for geothermal energy production: Numerical analysis of deep closed loop solutions in Italy by Marina Facci, Eloisa di Sipio, Gianluca Gola, Giordano Montegrossi, Antonio Galgaro

“…A preliminary analysis of a virtual Organic Rankine Cycle (ORC) system estimated power production of 73 kW, with an efficiency of 11.66 % after 25 years of operation under optimal conditions (5 l/s flow rate, 60 °C/km geothermal gradient, and 70 °C evaporation temperature).…”
Get full text

Graph Knowledge-Enhanced Iterated Greedy Algorithm for Hybrid Flowshop Scheduling Problem by Yingli Li, Biao Zhang, Kaipu Wang, Liping Zhang, Zikai Zhang, Yong Wang

“…The proposed algorithm addresses the trade-off between the finite solution space corresponding to solution representation and the search space for the optimal solution, as well as constructs a decision mechanism to determine which search operator should be used in different search stages to minimize the occurrence of futile searching and the low computational efficiency caused by individuals conducting unordered neighborhood searches. …”
Get full text

Research on provincial implied carbon emissions in China under the shared responsibility driven by new quality productivity: A new approach by Yingying Du, Haibin Liu, Hui Huang, Jiazeng Zhang, Yajie Wang

“…Key findings include: (1) The CVAT method's determination of responsibility sharing coefficients aligns with fairness and efficiency principles, resulting in a more equitable distribution of implied carbon emission responsibilities conducive to achieving fair carbon emission reduction. (2) Over the research period, national implied carbon emissions exhibited an upward trajectory, increasing from 3.305 billion tons in 2002 to 9.726 billion tons in 2017, with Shandong, Hebei, and Jiangsu provinces ranking among the top emitters in China. (3) Eastern coastal and western regions function as net carbon transfer out regions, while the central, northeast, and southwest regions act as net carbon transfer in regions. (4) The implied carbon transfer network demonstrated relative stability throughout the study period, with Shandong, Hebei, Jiangsu, and Inner Mongolia emerging as major carbon transfer provinces. …”
Get full text

MOTIVATION OF EDUCATIONAL ACTIVITY OF ADULT LEARNERS AS ONE OF THE URGENT PROBLEMS OF ADDITIONAL PROFESSIONAL EDUCATION by Angela Kobleva

Get full text

Construction and Application of Multi-dimensional Quality Evaluation Model of Government Reply by FU Rao, LIU Huilan

“…According to the potential spatial representation extracted by Auto Encoder and the representation weight determined by Entropy Weight Method, a comprehensive evaluation model of the quality of reply is realized. …”
Get full text

Least squares residual power series solutions for Kawahara and Rosenau-Hyman nonlinear wave interactions with applications in fluid dynamics by A. Hassan, A. A. M. Arafa, S. Z. Rida, M. A. Dagher, H. M. El Sherbiny

“…The problems presented below demonstrate how much faster the proposed method converges compared to the RPS method. Numerical results are presented to demonstrate the efficiency, accuracy, and rapid convergence of the method.…”
Get full text