bluuebunny/crossref_metadata_2025_split huggingface dataset:
Solution of the simplified fluid dynamic equation for transient processes in a gas centrifuge
Authors: Zeng S , Borisevich V D , Smirnov A Yu , Sulaberidze G A 
Published: January 2022

Abstract
The equation describing a transient process in a gas centrifuge is a partial differential equation and has to be solved by using a numerical method. The Crank-Nicolson scheme and a central difference scheme are employed, respectively, for time discretization and space discretization. Under the condition of full circulation flow, the solution of the equation coincides with the result of the linear theory, verifying the correctness of numerical solution. The transient processes of a centrifuge are simulated with two withdrawal models to reveal the variations of the axial velocity with time in the processes. The results shows that for a given rotor peripheral speed, the radial distribution of the axial velocity depends mainly on the wall pressure and the withdrawal strength, but the influence of the withdrawals is much weaker than the wall pressure. The results also demonstrate that the partial differential equations describing the fluid dynamics in a transient process does exhibit the dynamic variations, and can be further applied to the analysis of separation performance.
Three-dimensional modeling of the flow around the gas scoop under optimal working regime of the Iguassu gas centrifuge at the hyper fast rotation
Authors: Bogovalov S. V. , Borman V. D. , Vasilyev A. V. , Tronin I. V. , Tronin V. N. 
Published: January 2022

Abstract
The problem of the gas withdrawal from an Iguassu gas centrifuge (GC) at the speed of rotation, over 1000 m/s is considered. We focus our attention on the problem of achieving of optimal waste flow and friction power of the gas scoop simultaneously. Calculations were carried out in a three-dimensional approximation for supersonic flow of UF
6 around a stationary gas scoop taken as a Pitot tube with a diameter of 2 mm. Attempts to achieve the optimal working regime of GC for the selected particular gas scoop were not successful. On the basis of this results we conclude that the optimal gas withdrawal and creation of the optimal axial circulation can be problematic for the hyper-speed gas centrifuges.
Ordinary cascades for purification of reprocessed uranium hexafluoride from 232, 234, 236U isotopes
Authors: Palkin V A , Maslyukov E V , Lubnin S S 
Published: January 2022

Abstract
Reprocessed uranium gained from the spent nuclear fuel contains 232, 234, 236U isotopes within, which considerably hamper its reuse. It is proposed to use an ordinary cascade to reduce the concentration of 232, 234U. The output purified from 232, 234U is obtained in the cascade waste. The authors analysed the peculiarities of reducing concentration of 236U after the enrichment of reprocessed uranium hexafluoride in terms of 235U in the ordinary cascade and its subsequent dilution. A computational experiment was performed. Parameters of cascade stages were predetermined, which allow to reduce the content of 232, 234, 236U to an acceptable level.
A simulation and experimental study of dual-wavelength dye laser amplifiers
Authors: Yang Q N , Zhang X W , Dai X K 
Published: January 2022

Abstract
AVLIS requires a high average power laser beam of multiple wavelengths. There are two general ways to achieve such a beam. One is generating different wavelength laser beams by individual dye laser MOPA chains, then spatially combining them by a beam combiner. The other is combining different wavelength laser beams into one beam first, then co-amplifying it by a common MOPA chain. The latter one is more efficient. To further develop the method, this paper demonstrates a simulation and experimental study of dual-wavelength dye laser amplifiers. The one of the most critical parameters of a dual-wavelength laser beam is the power ratio of the two constituent beams, which can vary during the co-amplification. The simulation results show that for two laser beams with small wavelength difference, the spatial combination mismatches of two beams are the more dominant factor than the spectral differences in affecting the power ratio during the co-amplification. The result of the experiment is in good agreement with the simulation.
Program for calculating the technological and structural characteristics of plate and packed distillation columns for separating two, multicomponent mixtures and isotopes
Authors: Sukhar P A , Orlov A A , Petrov M V 
Published: January 2022

Abstract
The article describes the developed and software implemented methods for calculating the technological and structural characteristics of plated and packed distillation columns for separating two-component, multicomponent and isotopic mixtures. The results of the verification of the methods are presented. A good convergence of the calculation results with the known literature data is shown.
Boron isotope separation by extraction method: features of the phase composition and flow reflux
Authors: Khoroshilov A V , Ivanov P I 
Published: January 2022

Abstract
The publication is devoted to comprehensive studies of boron isotope exchange in two-phase liquid-liquid systems and reflects the features of the extraction separation of boron isotopes, including reagent-free phase flow reflux. The achieved experimental values of the single stage enrichment factor are commensurate with the analogous values for the main production technologies ofr the 10B concentrating, and the reagent-free version of the flow reflux determines the competitiveness of such process. The method is considered an alternative to ion exchange and liquid chromatography, and, possibly, chemical exchange with the participation of boron trifluoride.
A Software Reuse Technology Based on Common Factor Method and Its Application in Fast Programming
Authors: She XF , Bian BB 
Published: January 2022

Abstract
In the application software development process with complex data content and constantly changing structure, it is difficult to cope with rapid changes in requirements only by relying on object inheritance and component technology, resulting in low software development efficiency. In order to improve the efficiency of software development, the paper proposes a software reuse technology based on the common factor method. In the process of writing code, first, use common factors to express the relationship between changes and unchanging parts; then; integrate component member variables, file UI component data initialization, data acquisition, addition, modification and verification, achieve more efficient code reuse. Taking the application practice of the research and development of the hospital nutrition department consultation software as a case, the research results show that the technology can quickly reuse the existing code, generate the code required for new requirements, ensure the quality of the software, and improve the efficiency of the development of the software.
Analysis of the Influence of AVC Reactive Power Optimization on Line Loss in High Proportion New Energy Area
Authors: Liu SC , Zhang J , Wang HB , Wang XM , Ma YF , Yan W 
Published: January 2022

Abstract
In order to effectively reduce line loss, this paper analyzes the impact of AVC reactive power optimization in high proportion new energy areas on line loss under typical mode, and calculates the impact of new energy output on line loss when net load changes, and summarizes the law of AVC reactive power optimization in high proportion new energy areas and the impact of new energy output changes on power grid line loss. The research results show that the line loss rate of the main grid and the line loss rate of each partial voltage tend to decrease in the three modes of new energy generation, small generation and zero generation.
Study on Calculation Method of Internal Force of Integral Abutment-Pile-Soil Interaction
Authors: Huang FY , Li L , Zhang F , Lin YW 
Published: January 2022

Abstract
Integral abutment jointless bridge (iajb) has the advantages of long service life, convenient construction and low construction and maintenance cost. At present, it has been widely used at home and abroad. Based on an actual iajb, an experimental model of integral abutment pile structure is designed and made. The quasi-static test is carried out under low cyclic displacement load, and the interaction between integral abutment, H-steel pile and soil is studied, with emphasis on the strain and bending moment of abutment and pile foundation. The test results show that the strain distribution of pile body is “Cup” shape when the abutment moves forward and “olive” shape when the abutment moves negatively. The maximum compressive stress and tensile stress under positive displacement load are greater than those under negative displacement load. Therefore, when the temperature increases, the internal force of pile foundation is greater than that when the temperature decreases, which means that H-shaped steel foundation pile is more unfavorable when the temperature increases in summer. In order to reduce the adverse effect of temperature on foundation piles, it is suggested that the overall closure temperature of the bridge should be slightly higher than the annual average temperature. In addition, the calculation also shows that when negative load is adopted, the pile bending moment calculated by these methods is not different from the test results, and the distribution law is similar to that of traditional foundation piles. However, under normal load, the pile bending moment calculated by classical theory or bridge code is quite different from the test results, and the distribution law is also different. In this paper, the moment of integral abutment pile-soil interaction is calculated accurately by polynomial fitting method and huanglin method, which can be used in practical engineering and provide reference for the design and application of iajbs.
A transmission line fault rate correction method for meteorological risk sources
Authors: Zhang F , Liu XM , Fan MZ , Dong X , Yu X 
Published: January 2022

Abstract
A transmission line fault rate correction method for meteorological risk sources is proposed in this paper. Firstly, a complex weather risk source model considering lightning, rainfall, wind, temperature, relative humidity and other meteorological factors is established by introducing the overrun penalty variable weight entropy theory, and the corresponding comprehensive meteorological factors are calculated by using the model; Then, based on the electrical equipment health index model, a transmission line fault rate correction method based on meteorological risk sources is designed. Finally, the effectiveness of the method is verified by simulation experiments.
Analysis and Research on Anti-seismic Scheme of Railway Simple Supported Beam Bridge
Authors: Li X , Li DY , Jia LZ , Song JP , Yue JS 
Published: January 2022

Abstract
In order to improve the seismic performance of railway simply supported beam bridges, the seismic design schemes in different seismic intensity areas are compared and analyzed in this paper. The results show that the relative displacement of beam piers is too large when the simply supported beam bridge (≥ 0.3g) in high intensity earthquake area only adopts damping and isolation bearings. In order to reduce the displacement after earthquake, it is necessary to increase damping energy dissipation devices. Simply supported beam bridge in low intensity earthquake area (≤ 0.2g) adopt shock-absorbing isolation bearing. The cost of bearing will not increase, and the safety of bridge under earthquake will be greatly improved. It is recommended to adopt isolation design in low intensity seismic area.
Dynamic response analysis of isolated curved beam bridge under multi-dimensional non-stationary random excitation considering the torsion component
Authors: Li XM , Wang JC , Pu K , Mu BH 
Published: January 2022

Abstract
The coupling effect of bending and torsion caused by plane irregularity of the isolated curved beam bridge makes its seismic response more complex than that of the isolated straight beam bridge. In order to study the influence of multi-dimensional non-stationary random excitation considering torsion component on seismic response of tqiongw@mls.sinanet.com he isolated curved beam bridge. The classical Bouc-Wen model was used to simulate the hysteretic characteristics of the curved beam bridge, and the nonlinear dynamic equation considering the eccentricity of superstructure was established. The pseudo excitation was transformed into harmonic external load by Euler formula, and combining with the precise integration method, the precise integration forms of the special solution under different modulation functions were derived. By using these integral forms to solve the response at each time, the time-varying variance of displacement of the isolated curved beam bridge under multi-dimensional non-stationary random excitation was obtained, and the law of time-varying variance of displacement, including the upper and lower structures of the isolated curved beam bridge, was analyzed with different deck width, curvature radius and yield ratio of bearing. The results show that the multi-dimensional non-stationary random excitation with torsion component has significant influence on the seismic response of the isolated curved beam bridge. Under the rare non-stationary random excitation, the dynamic response of the isolated curved beam bridge presents strong non-stationarity, and the time-lag phenomenon is apparent. For the isolated curved beam bridge with large deck width and small yield ratio of bearing, the influence of non-stationary random excitation on the structure is particularly obvious. The influence of non-stationary random excitation considering torsion component on dynamic response of the isolated curved beam bridge with large deck width, small curvature radius and large yield ratio of bearing is more significant.
Experimental analysis of corbel of pile slab subgrade
Authors: Lei J 
Published: January 2022

Abstract
In order to realize the reasonable design of new type pile slab subgrade, this study, relying on the reconstruction and expansion project of Lintou Longxi Interchange Section of G5011 Wuhe expressway, constructs a pile slab subgrade model with 15 holes and each hole is 6m. The weakest section of the corbel is determined by checking the mechanical performance of the corbel section, and the mechanical performance of the bracket of the new vertical limited expansion joint of the pile slab subgrade under the most unfavorable load is obtained by the full-scale model. Based on the separation modeling method, the nonlinear analysis of the full-scale specimen under the test loading condition with the load displacement curve in good agreement with the measured results is achieved. Combined with the static performance test of full-scale components, it is verified that the pile slab subgrade has good bearing capacity, which can be applied to engineering.
Evaluation method of building decoration engineering based on interactive information model
Authors: Liu T 
Published: January 2022

Abstract
In order to improve the accuracy of architectural decoration engineering evaluation, a new evaluation method based on interactive information model is proposed in this paper. First, the paper establishes iim model to complete the evaluation index system of architectural decoration engineering. Then, the weight vectors of the criterion layer and the target layer are determined by the mathematical analytic hierarchy process. Finally, the comprehensive evaluation result of low-carbon Green building design scheme is obtained by calculating the whitening weight function of each gray class. The experimental results show that the method has high accuracy and strong practicability.
Experimental verification and data analysis of Wet joint of pile slab
Authors: Zhang Y 
Published: January 2022

Abstract
In order to realize the reasonable design of the new-type pile-slab subgrade, this study relied on the reconstruction and expansion project of the G5011 Wuhe Expressway from Lintou to Longxi Interchange to construct a pile-slab subgrade model with 15 holes and 6m each. The displacement of the wet joint of the pile-slab subgrade was obtained through the full-scale model. Based on the separate modeling method, the load-displacement curve and the load-stress curve are in good agreement with the actual test results. Linear analysis. Combined with the full-scale component static performance test, it is verified that the wet joints of the constructed pile-slab subgrade are basically in the linear elastic working stage under the design load frequency combination condition, which can be applied to engineering.
Study on seismic mitigation Performance of Long-span High-speed Railway Continuous Beam Bridge with Viscous Damper
Authors: Quan W , Yu HM , Wen X , Liu ZX 
Published: January 2022

Abstract
Taking the 128m long-span high-speed railway continuous beam bridge commonly used in China as the example, a reasonable finite element analysis model with seismic mitigation devices of the bridges is established, and nonlinear dynamic time history analysis is used to analyze the seismic mitigation of viscous dampers. three seismic waves with the same peak acceleration but different spectral components are selected to perform optimization analysis on the viscous damper parameters, damping index and damping coefficient. Numerical analysis results show that: (1) The viscous damper can play a very good damping effect. (2) Under the action of the El Centro wave and Tianjin wave, the damping rates of the fixed pier reached more than 81%. Under the action of Taft wave, except for the relative displacement of the fixed-pier, the damping rates of the structure reached more than 74%; The internal force of the other piers and the displacement of the top of the pier increase, but the increase is not large compared with the response value of the fixed pier, and the forces on the piers tend to be uniform and reasonable. (3) The three kinds of seismic wave have different optimization results for the mechanical parameters of the viscous damper model. When selecting the actual devices parameters, the ground motion with the corresponding spectral characteristics should be selected according to the bridge site for optimization analysis. Besides, the devices structure, size requirement and other reason should be considered comprehensively.
Study on Mechanical Properties of Simply Supported Girder Bridge after Jointless
Authors: Guo WQ , Luo XY , Tang YF , Fu RH , Javanmardi A 
Published: January 2022

Abstract
The jointless bridges includes integral bridges, semi-integral bridges and extended deck bridges. The integral bridges adopts an integral abutment, and its main girder, abutment and pile under abutment are fixed together to bear the force together. The expansion joint and expansion device are cancelled, and the integrity, durability and driving comfort of the bridge are improved. In this paper, a simply supported girder bridge in Fujian Province of China is taken as the research background, and it is transformed into an integral bridge. Midas/Civil software is used to establish the finite element models of the original bridge and the integral bridge, and the mechanical properties of the main girder and the pile under the combined action of dead load and overall temperature rise of 25 °C are analyzed. The results show that due to the consolidation of the main girder and abutment of the integral bridge, the internal force at the girder end under the combined action of temperature and dead load is greater than that of the simply supported beam bridge. The pile deformation of the integral bridge is significant under the combination of temperature and dead load. With the increase of the height-to-thickness ratio of the abutment of integral bridge, the bending moment at the girder end and the mid-span are increasing. Different abutment height-to-thickness ratio has little influence on the horizontal displacement of the girder end of integral bridge. With the increase of height-to-thickness ratio of the abutment of integral bridge, the deformation of pile decreases. The flexible abutment with large height-to-thickness ratio can improve the mechanical properties of pile and achieve the purpose of protecting the pile.
Comparative study of numerical simulation methods for seismic pounding of adjacent girder of curved girder bridges
Authors: Jiao CY , Cheng MZ , Cheng H , Xiao X , Wu YF 
Published: January 2022

Abstract
Under seismic action, non-uniform collision will occur between the main beams of curved beam bridge, which may lead to local damage of front beam or rear beam. At present, the research on collision effect is mainly based on straight beam bridge, and there is still a lack of relevant research on seismic collision of curved beam bridge. Taking two adjacent typical curved bridges as examples, this paper establishes contact elements (linear elastic model, Kelvin model and Hertz model) and solid elements (three-dimensional contact friction model) which can fully reflect the physical characteristics of seismic collision of curved bridges. By comparing the numerical simulation methods of seismic collision, the advantages and disadvantages of the existing numerical simulation methods in the seismic response analysis of curved bridges are evaluated. The results show that the calculation results of Kelvin model and three-dimensional contact friction model have the least error and high calculation efficiency, and are suitable for the seismic analysis of curved beam bridges.
Research on distributed network attack source tracking method based on interference suppression
Authors: Hu PG , Chen XQ 
Published: January 2022

Abstract
In order to improve the security of distributed network operation, a distributed network attack source tracking method based on interference suppression is proposed. According to the structural characteristics of distributed network, the signal expression relationship between different distributed hosts is constructed, and the generalized cross-correlation weighting function is constructed to suppress the interference of distributed network. Based on this, particle swarm optimization algorithm is used to collect a sufficient number of attack marking information packets through multiple iterations. The interference signal of the separated signal is obtained through blind source separation. After signal separation, the tracking results of different attack source signals are obtained. The experimental results show that compared with the traditional attack source tracking method, this method not only reduces the tracking time, but also greatly improves the tracking accuracy.
The Optimization Method of Mechanical Fault Diagnosis Based on Artificial Intelligence Technology
Authors: Song JY , Li ZX , Li YX , Han DS 
Published: January 2022

Abstract
In order to overcome the problems existing in the traditional mechanical fault diagnosis, and to improve the accuracy of mechanical fault diagnosis, an optimization method of mechanical fault diagnosis based on artificial intelligence technology is proposed in this paper. The optimization method combines a variety of current popular high and new technologies, such as artificial intelligence technology, expert system and artificial neural network technology. at the same time, the optimization method also breaks the traditional mechanical fault diagnosis mode based on fuzzy set theory. Based on this, the optimization method also makes an in-depth analysis and research on artificial intelligence technology, which promotes the application and development of artificial intelligence technology, and expands the application scope and application field of artificial intelligence technology. The research results show that the optimization method can scientifically overcome the problems existing in the traditional mechanical fault diagnosis, and can improve the accuracy and scientificalness in the process of mechanical fault diagnosis, so it has strong feasibility.