Mechanisms and equation improvement for gas seepage in coal seams around boreholes subjected to high-pressure CO2 foam fracturing by Mingkun PANG, Tianyu ZHANG, Hongyu PAN, Xianfeng SONG, Shan WU, Tianjun ZHANG

“…ObjectiveThe special low-porosity, low-permeability structures of high-gas-content coal seams restrict efficient gas drainage. To address this issue, this study accurately determined the seepage parameters of annularly fractured coals around boreholes subjected to CO2 foam fracturing to enhance both the design accuracy of boreholes for gas pre-drainage from coal seams and gas drainage efficiency. …”
Get full text

Thermodynamic, Economic, and Environmental Multi-Criteria Optimization of a Multi-Stage Rankine System for LNG Cold Energy Utilization by Ruiqiang Ma, Yingxue Lu, Xiaohui Yu, Bin Yang

“…The optimal operating points of the system were determined using non-dominated sorting genetic algorithm II and TOPSIS methods, while employing Gray Relational Analysis was applied to compute the gray relational coefficients of candidate working fluids at the optimal operating points. …”
Get full text

Prevention of Bankruptcy of Industrial Enterprises and Organizations with State Participation by E. V. Gavrilin, S. V. Khetagurov

“…As a result of the study, the main problems of law enforcement and managerial practice in detecting offenses during bankruptcy procedures are considered and the necessary areas of management and regulatory regulation are identified, an approach to identifying the threat of bankruptcy and implementing anti-crisis measures when managing state industrial enterprises and organizations is determined. The study may be of interest to public authorities in determining the methodological and regulatory framework, as well as strategies to improve the efficiency of management of state enterprises and organizations, and ensure economic security.…”
Get full text

Theoretical background of hydraulic drive control system analysis for testing piston hydraulic cylinders by A. T. Rybak, I. K. Tsybriy, S. V. Nosachev, A. R. Zenin

“…The system of equations presented in the paper shows how the increment of pressure at the selected nodal points of the energy recovery system is determined (in particular, how the increment depends on time, reduced coefficient of volumetric rigidity, operating fluid consumption, and piston areas). …”
Get full text

Role of turbulent heat exchange in the heat balance structure of glaciers of the central Spitsbergen: the case of Aldegondabreen by U. V. Prokhorova, K. V. Barskov, A. V. Terekhov, D. G. Chechin, I. A. Repina, B. V. Ivanov, M. I. Varentsov, A. Yu. Artamonov

“…Mean values of heat fluxes during the ablation season for the period 1991–2020 were calculated for Aldegondabreen: the short-wave balance is 72.6–113.8 W∙m−2; the longwave balance is 14.5 W∙m−2; the turbulent fluxes of sensible and latent heat determined by the aerodynamic method are 20.5 and about 1 W∙m−2, respectively. …”
Get full text

ANALISA RUTE DISTRIBUSI DAN BIAYA TRANSPORTASI SEBAGAI PENDUKUNG BISNIS PT POS INDONESIA KP BANJARNEGARA by Aditia Sovia Pramudita

“…This shows that the nearest neighbor method is more efficient in determining distribution routes, and this route can be done by using just one vehicle. …”
Get full text

Research status of amine aerosol formation and emission in amine carbon capture process by YANG Zhengda*, XIAN Zhennan, SHAO Lingyu, ZHENG Chenghang

“…This paper introduces the significance of heterogeneous nuclei in heterogeneous nucleation of amine aerosols. The test methods of amine aerosol concentration and size are summarized. …”
Get full text

A comprehensive performance audit model in the public health sector using the grounded theory approach by Hojjat Esmati Beyrami, Aliasghar Motaghi, Younes Badavar Nahandi, Ahmad Mohamadi

“…This paper aims to develop a performance auditing model in the health sector. Methods: This qualitative study is based on grounded theory. …”
Get full text

Screening for cold tolerance resources in maize seedlings and analysis of leaf cell responses by Mengting Hu, Mengting Hu, Dan Zhang, Dan Zhang, Wentao Du, Wentao Du, Huijuan Tian, Huijuan Tian, Ying Hao, Ying Hao, Shuqi Ding, Shuqi Ding, Kaizhi Yang, Kaizhi Yang, Ruohang Xu, Ruohang Xu, Lei Zhang, Lei Zhang

Get full text

Online detection of phase resistance of switched reluctance motor by sinusoidal signal injection by Y. Lee

“…The phasor method is then applied to determine the impedance of the phase circuit, from which the phase resistance can be identified. …”
Get full text

Heterologous Expression and Characterization of Collagenase from Lysinibacillus sphaericus and Its Application in the Preparation of Antioxidant Peptides by Haixing WU, Anni HUANG, Xia GAO, Xuanri SHEN, Guanghua XIA, Xueying ZHANG

Get full text

FPGA Implementation of Optimal 3D-Integer DCT Structure for Video Compression by J. Augustin Jacob, N. Senthil Kumar

“…A novel optimal structure for implementing 3D-integer discrete cosine transform (DCT) is presented by analyzing various integer approximation methods. The integer set with reduced mean squared error (MSE) and high coding efficiency are considered for implementation in FPGA. …”
Get full text

Application of UAV and satellite technologies for assessing phytophthora root rot severity in avocado orchards by S. Duncan, A. McLeod, C. Poblete-Echeverria

“…The current commercially accepted method for determining PRR severity in canopies consists of a visual estimation using the ‘Ciba-Geigy’ rating scale. …”
Get full text

Critical Loads of Uniformly Compressed Orthotropic Rectangular Plate on an Elastic Base by I. M. Peshkhoev, B. V. Sobol

“…At the same time, the variational method in combination with the finite difference method was used to solve the boundary eigenvalue problem.Results. …”
Get full text

Direct and rapid screening of four organic compound metabolites in urine by paper spray mass spectrometry by Junyu PAN, Mengmeng LIU, Qiang ZENG

“…Under the optimized experimental conditions, both external standard and internal standard methods were used for quantitative analysis. Limit of detection, limit of quantification, accuracy, and precision of the proposed method were determined by spiking blank urine samples. …”
Get full text

Resolution of Two Sub-Populations of Conformers and Their Individual Dynamics by Time Resolved Ensemble Level FRET Measurements. by Gil Rahamim, Marina Chemerovski-Glikman, Shai Rahimipour, Dan Amir, Elisha Haas

“…Most active biopolymers are dynamic structures; thus, ensembles of such molecules should be characterized by distributions of intra- or intermolecular distances and their fast fluctuations. A method of choice to determine intramolecular distances is based on Förster resonance energy transfer (FRET) measurements. …”
Get full text

Interval-Aware Scheduling of Surveillance Drones: Exact and Heuristic Approaches by Kaito Mori, Hiroki Nishikawa, Hiroyuki Tomiyama

“…Moreover, establishing an optimal patrol schedule for drones is crucial for efficient security operations. This paper proposes four methods for determining the optimal patrol schedule for drones: the ILP-based method, the Greedy method, the Simulated Annealing method, and the Multi-stage method. …”
Get full text

RENDERING LINGUISTIC REPRESENTATION OF DEATH IMAGE IN CLASSICAL HORROR FICTION by Artur G. Gudmanian, Andriana O. Ivanova

“…Shelley’s novel “Frankenstein; or, the Modern Prometheus” and determine the efficient translation strategies of rendering them into Ukrainian. …”
Get full text

Application of five seismic attributes in natural fracture prediction for deep coalbed methane production along the eastern margin of the Ordos Basin by Jiangnan TONG, Feng WANG, Feng ZHANG, Wei HOU, Zhongbai LI, Liang JI, Yanan JIANG, Wei SUN

“…Results and Conclusionsthis study developed a technical process for the five-dimensional seismic data-based interpretation that combined the methods of elliptical fitting and azimuthal statistics. …”
Get full text

VORTEX DEVICES OF THE DIESEL AIR SUPPLY SYSTEM: MATHEMATICAL MODEL OF AERODYNAMIC PROCESSES by R. V. Yakimushkin

“…The author presented differential equations, which were solved by the Runge-Kutt method of the second order. As a result of the solution, the authors determined paths of air elements movement in the vortex ejector, which allowed estimating effective parameters of vortex devices.Results. …”
Get full text