A New Method for Calculating the Cementation Exponent of Triple-Porosity Media Reservoirs by Dahai Wang, Jinbu Li, Lili Liu, Ji Zhang, Zhanhai Yu, Jun Peng

“…The value of a cementation exponent, usually obtained by rock and electricity experiments, significantly affects the calculation of water saturation, thickness of the hydrocarbon reservoir, and recovery rate. …”
Get full text

Accurate calculation of the content volume, density and original weight of museum curated eggs by Valeriy G. Narushin, Michael N. Romanov, Nili Avni-Magen, Darren K. Griffin

“…A mathematical algorithm for calculating the D i value depending on the S/V ratio provides the missing link in calculating W of a whole egg from archived collection material.…”
Get full text

Algorithmic implementation of calculation of energy consumption and determination of the class of energy efficiency of elevators by А. V. Ded, V. A. Tkachenko

“…The article presents the results of the implementation of the developed algorithm for calculating the energy consumption of elevators in order to determine the class of their energy efficiency. …”
Get full text

Design of Pd-Based Bimetallic Catalysts for ORR: A DFT Calculation Study by Lihui Ou

“…By performing detailed DFT calculations on the thermodynamics, surface chemistry and electronic properties of Pd-M alloys, Pd-V, Pd-Fe, Pd-Zn, Pd-Nb, and Pd-Ta, are identified theoretically to have stable Pd segregated surface and improved ORR activity. …”
Get full text

COMPARISON OF METHODS FOR CALCULATING VOLUMES OF MINERAL RAW MATERIALS DURING SURFACE EXPLOITATION by Amela Kešetović, Amar Isaković, Jasmin Ćatić

Subjects: Get full text

TVMS Calculation and Dynamic Analysis of Cracked Gear considering Oil Film Stiffness by Jiateng Wu, Zhenqi Du, Chengbiao Tong

Get full text

Method for calculating actual capacity of single-stage long-stroke reciprocating compressors by V. L. Yusha, S. S. Busarov

“…The article presents a generalized method for calculating the actual performance of low-speed long-stroke air compressor stages of compression, based on determining the flow rate as a set of coefficients reflecting the influence of various factors on productivity losses. …”
Get full text

Measuring and Calculative Complex for Registration of Quasi-Static and Dynamic Processes of Electromagnetic Irradiation by V. I. Ovchinnikov, E. A. Doroshkevich, S. M. Usherenko, A. S. Kalinichenko

Get full text

Calculation of Correction Factors for Vickers’ Hardness Measurements on a Non-Planar Surface by S. G. Sandomirski, A. L. Val’ko, S. P. Rudenko

“…The sufficiency of using of a quadratic power function for approximating K(d/D) dependences and the necessity of fulfilling the physically justified condition K ≡ 1 at zero curvature of tested surface have been substantiated. Simplification of calculation of K coefficient and decrease of calculation error in comparison with the recommended in the regulatory documents obtaining of K value by linear interpolation relative to two adjacent table values are shown.The reduction of the calculation error in comparison with the calculation recommended in the regulatory documents occurred because of the reason that when calculating by the developed formulas, the error in the value of the calculated for a specific value of d/D coefficient K is averaged over all n values of d/D given in the table of GOST for a given surface. …”
Get full text

Incubation-time distribution in back-calculation applied to HIV/AIDS data in India by Arni S.R. Srinivasa Rao, Masayuki Kakehashi

Subjects: Get full text

Application of the weighted histogram method for calculating the thermodynamic parameters of the formation of oligodeoxyribonucleotide duplexes by I. I. Yushin, V. M. Golyshev, D. V. Pyshnyi, A. A. Lomzov

“…These parameters can be calculated only for a few NA derivatives: locked NAs, bridged oligonucleotides, and peptide NAs. …”
Get full text

Calculation of Seven Photovoltaic Cells Parameters Using Parallelized Successive Discretization Algorithm by Adrian M. Deaconu, Daniel T. Cotfas, Petru A. Cotfas

“…Some parameters must be calculated with very good accuracy for the purpose of designing, simulating, and evaluating the performance of a photovoltaic system. …”
Get full text

Efficient algorithm for calculating short cycles in Tanner graph based on matrix computation by Qing ZHU, Le-nan WU, Yong-biao YANG, Jie LI, Shi-ming XU

“…Loop distribution of Tanner graph affects the BER performance of low-density parity-check codes(LDPC) decoding.To count short cycles in the Tanner graph efficiently,a side by side recursion algorithm based on matrix computation was proposed.Firstly,5 basic graph structures were defined to realize recursive calculate in the implementation process.Compared with previous works,the algorithm provided many methods for counting the same length of cycles.The same result confirmed the correctness of the algorithm.The new algorithm could not only calculate the total number of cycles,but also gave the number each edge participating in fixed-length cycles.Its complexity was proportional to the product of D and square of N,where D was the average degree of variable nodes,and N denoted the code length.For LDPC codes,D was far less than N.For most of the LDPC codes,the calculation for numbers of cycle-length g、g+2、g+4 was only several seconds.…”
Get full text

A Hydropower Station Water Tunnel Brow-out Accident Calculation Analysis by CHEN Ke-zhen, ZHOU Yi-hong

Get full text

Development of the Method for Calculation of Reinforced Concrete Structures on the Formation and Opening of Normal Cracks by Nikolay N. Trekin, Emil N. Kodysh, Sergey G. Parfenov, Konstantin R. Andrian

“…This paper presents the history of the development of the method for calculating the crack resistance of reinforced concrete elements according to Soviet and modern design standards, which was based on the work of the Soviet and foreign scientists, such as: A.F. …”
Get full text

Calculation of Cross-sectional Shape and Polar Moment of Inertia of a Thread Screw by Wang Baomin, Guo Hongfeng, Chai Xiaoyu

“…According to the characteristic of the trapezoidal thread screw,at first,the equation of the cross- section shape intersecting line is deduced,and according to the concept of polar moment of inertia in material mechanics and superposition principle,the accurate calculation formula of threaded screw polar moment of inertia is got. …”
Get full text

An Improved Model to Calculate Pullback Force of Trenchless Horizontal Directional Drilling Pipeline by Xiao-qiang Liang, Da Hu, Yong-suo Li, Xian Yang, Lei Jiang, Yun-yi Zhang

“…In the pullback operation of horizontal directional drilling pipeline crossing, the existing calculation and prediction models of pullback force are relatively simple. …”
Get full text

Method to calculate the diameter of undirected double-loop networks G（N;±1,±s） by FANG Mu-yun1, ZHAO Bao-hua1

“…A new method,step-search-diameter,to calculate the diameter of undirected double-loop networks G（N;±1,±s） was presented.A new diagram,spiral ring whose attributes were studied,was obtained by this method.A simple formula to express the d（N;±1,±s） of undirected double-loop networks was presented.The algorithm to calculate the diameter of undirected double-loop networks whose N,s were fixed and the algorithm to calculate the diameter of undirected dou-ble-loop networks whose N was fixed but s varied from 2 to N?…”
Get full text

Retracted: Molecular Dynamics Simulation Calculation Method for Elasticity and Plasticity of Metal Nanostructures by Advances in Materials Science and Engineering

Get full text

Influence of the Latest Cylindrical Gear International Accuracy Standard on the Gear Strength Calculation by Tang Jie, Chai Lingyu, Shi Zhaoyao

“…The instance calculation results shows that the difference percentage of the calculation tooth root stress of gear a is 4. 86%,while gear b is 14. 12%. …”
Get full text