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61
Transient characteristic analysis for large-scale power system with MMC-MTDC
Published 2022-08-01“…The corresponding simulation flowchart is also presented, where the MMC-MTDC grid dynamics are calculated by EMT simulation and the ac grid is simulated by the TS program. Second, based on the mathematical model of the MMC-MTDC grid, the transient characteristics during various faults are analyzed. …”
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62
Characterizing popularity dynamics of hot topics using micro-blogs spatio-temporal data
Published 2019-11-01“…Firstly, the popularity time series of 1167 hot topics were counted and calculated by Excel. Secondly, based on MATLAB software,the popularity time series were clustered into six clusters by K-spectral centroid (K-SC) clustering algorithm. …”
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63
A Comprehensive Reliability Assessment Method for Existing Railway Bridges Based on Bayesian Theory
Published 2022-01-01“…To construct a comprehensive assessment method for the safety and reliability of existing railway bridges, firstly, the risk factors of railway bridge structures are analyzed and the evaluation criteria are determined; secondly, based on the accident tree theory, a multilevel Bayesian network model with key points is established, and the ability of the Bayesian network bidirectional reasoning and sensitivity analysis is used to evaluate the structural safety; finally, the result was applied to the marina northern Songhua River extra-large bridge to verify the applicability of the comprehensive evaluation of the reliability of an existing railway bridge. …”
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64
The Skeleton: Connecting Large Scale Structures to Galaxy Formation
Published 2009“…The first, based on a global study of the matter density gradient flow, allows us to study the connectivity between a density peak and its surroundings, with direct relevance to the anisotropic accretion via cold flows on galactic halos. From the second, based on a local constraint equation involving the derivatives of the field, we can derive predictions for powerful statistics, such as the differential length and the relative saddle to extrema counts of the Cosmic web as a function of density threshold (with application to percolation of structures and connectivity), as well as a theoretical framework to study their cosmic evolution through the onset of gravity-induced non-linearities.…”
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65
Curve length estimation using vertix chain code
Published 2010“…First, the way Bribiesca proposed which is based on counting links between vertices; second, based on maximum length digital straight segments (DSSs) and lastly local metrics. …”
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66
Bridging the Gap between Science and Policy: A Prerequisite for Effective Water Governance
Published 2023-03-01“…Firstly, we identified the social system engaged to the basin through stakeholders’ mapping. Secondly, based on criteria selection, three stakeholders’ groups were invited to a workshop. …”
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67
A Lumped-Parameter Equivalent Circuit Modeling for S-Shaped <i>I</i>–<i>V</i> Kinks of Organic Solar Cells
Published 2019-02-01“…Firstly, to predict the S-shaped <i>I</i>⁻<i>V</i> kinks accurately in both the first and fourth quadrants, a shunt resistor in parallel with extraction diode is added to our previous model. Secondly, based on the Newton⁻Raphson method, we derive a solution to our improved circuit. …”
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68
Determining Optimum Oil Separator Size and Optimum Operating Pressure
Published 2022-06-01“…Because Jambur field has a high production rate two conditions are taken in the study to determine separator size, first based on production rate 80,000 bbl/day and second based on split the production between two banks A and B (40,000 bbl/day for each bank). …”
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69
Do the Peculiar Economics of Professional Team Sports Apply to Esports? Sequential Snowballing Literature Reviews and Implications
Published 2021-03-01“…First, the literature on the peculiar economics of professional team sports was reviewed and assessed by the authors, based on their degree of distinctiveness and how core they are for the sector. Second, based on the main peculiar economics identified, a similar process considering economic aspects in the esports literature was conducted. …”
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70
A multiple linear regression-based study of the effect of college teachers’ teaching training on teaching performance
Published 2024-01-01“…The first part of this paper examines the training needs of college teachers teaching based on career management orientation and circular assessment model. Secondly, based on a multiple linear regression algorithm to construct the teaching training model for college teachers, the least squares method is used to find the optimal solution and mean square error to solve the parameters of the teaching training model. …”
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71
Design and Analysis of Wide Speed Regulation of Variable Leakage Flux Reverse Salient-Pole Motor
Published 2023-09-01“…Firstly, the evolution of the topological structure and working principle of the motor are introduced. Secondly, based on 2D Finite Element Analysis (FEA), the electromagnetic properties and noise of the motor are analyzed in detail, and the electromagnetic properties are contrasted with that of the conventional V-type synchronous motor (CVTSM). …”
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72
Distribution of Cutting and Welding Thermal Residual Stress in Steel Bone with and without Holes in the Partially Encased Composite Wall
Published 2022-11-01“…In this study, we first conducted a cutting thermal conductivity analysis and stress analysis of the flange and webs. Second, based on the cutting residual stress of different sheet steel, the welding thermal conductivity analysis and stress analysis of I-shaped calculation units with and without a hole in the web were carried out. …”
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73
Handwriting Character Recognition using Vector Quantization Technique
Published 2019-12-01“…Based on these variations, the obtained performance with a mean square error (MSE) of 0.0306 and the time required during the learning process was quite short, 6 minutes and 38 seconds. Based on the results of the testing, the LVQ method has not been able to provide good recognition results and still requires development to generate better recognition results.…”
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74
Stability Analysis and Synthesis for 2-D Switched Systems with Random Disturbance
Published 2022-03-01“…First, based on the Fornasini–Marchesini local state space model, a random discrete 2-D switched system model is proposed. Secondly, based on the method of switching quadratic Lyapunov function, Schur complement and linear matrix inequality the criterion of the sufficiency of the asymptotically stable under any switching signal is established. …”
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75
Overview of collaborative response between the power distribution network and urban transportation network coupled by electric vehicle cluster under unconventional events
Published 2022-12-01“…First, the multidimensional and deep‐level time‐varying closed‐loop coupling effects of the power distribution network and urban transportation network coupled by electric vehicle clusters are analysed under unconventional events. Second, based on the different scales of unconventional events, a summary of relevant studies is made on the collaborative response strategies of the coupled system to urban local power outages and large‐scale blackouts following unconventional events. …”
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76
Power-balancing compensation mechanism and method for controllable load reduction
Published 2023-01-01“…First, a multi-round sequential auction method is used to determine the reduced and non-reduced loads. Second, based on the proportional distribution according to the reduction loss, a compensation method for the reduced load by the non-reduced load is proposed. …”
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77
RESEARCH ON EARLY WARNING METHOD OF ROTOR VIBRATION OF TURBOGENERATOR UNIT (MT)
Published 2023-01-01“…Firstly, the running law of rotor vibration is analyzed. Secondly, based on the vibration operation law, the calculation method of rotor vibration abnormal threshold is proposed. …”
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78
Model-Based Current Sharing Approach for DCM Interleaved Flyback Micro-Inverter
Published 2018-06-01“…Firstly, an accurate fourth-order model is presented for the interleaved flyback circuit, which takes the two flybacks’ parameter mismatch and coupling into account. Secondly, based on the presented model, a continuous time sliding mode current controller is proposed to tackle the output imbalance caused by parameter mismatch, coupling and disturbance. …”
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79
Cyclical capitalization: basic models
Published 2022-07-01“…To allow a more extensive use of cyclical capitalization in formulating value judgments, this paper proposes two methodological adaptations to the original model: the first, based on the presence of a regular market trend; the second based on the hypothesis of irregular market cycles and therefore more representative of the dynamics to which a specific real estate segment is exposed. …”
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80
A Compact Electromagnetic Dual Actuation Positioning System with a 10 mm Range and Nanometer Resolution
Published 2023-03-01“…Firstly, the stiffness of the flexure mechanism is modelled. Secondly, based on it, the primary coil is designed, and from its performance, a suitable secondary coil is made to compensate for the deficiency of the primary actuation subsystem. …”
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