Virtual Synchronous Generator Control of Grid Connected Modular Multilevel Converters with an Improved Capacitor Voltage Balancing Method by Haroun Bensiali, Farid Khoucha, Abdeldjabar Benrabah, Lakhdar Benhamimid, Mohamed Benbouzid

“…This paper proposes a new combined control strategy based on virtual synchronous generator (VSG) control and capacitor voltage balancing (CVB) method. The VSG control is applied for power sharing and inertia emulation to increase the dynamic response and improve system stability while the CVB method is used to redistribute the energy stored in the capacitors of the submodules (SMs) in order to ensure uniform voltage levels and equalize the voltage across the capacitors. …”
Get full text

Haar wavelet collocation method for existence and numerical solutions of fourth-order integro-differential equations with bounded coefficients by Amin Rohul, Nawaz Muhammad, Shah Kamal, Abdeljawad Thabet

“…To demonstrate the applicability of the proposed method, an experimental rate of convergence is calculated, which is almost equal to 2. …”
Get full text

Construction method of type-Ⅱ even-length Z-complementary pair with large zero correlation zone width by Xiaoyu CHEN, Lianfeng SUN, Yihan ZHANG

“…The construction method of Type-Ⅱ even-length Z-complementary pair (ZCP) was proposed by using the inter-leaving technique.The basic framework of interleaving structure with Golay complementary pair (GCP) and its mate as the basic sequences was proposed.Furthermore, the necessary conditions were given for the framework in order that the resulting ZCP could have large zero correlation zone (ZCZ) width.The main parameter form of the constructed ZCP was((2k+1)N,(2k+1)N-k)-ZCP, where N was the length of the chosen GCP.Although not all even lengths can be covered, the constructed ZCP has the ZCZ width that can achieve or approach the upper bound of Type-Ⅱ even-length binary ZCP, and has small peak-to-mean envelope power ratio whose value is less than or equal to 4.The resultant sequences can be applied to multi-carrier spread spectrum system to eliminate more asynchronous interference and reduce nonlinear distortion.…”
Get full text

Omni directional video coding rate distortion optimization method based on weighted-to-spherically-uniform structural similarity by Yufeng ZHOU, Mei YU, Baozhen DU, Yang SONG, Gangyi JIANG

“…Aiming at the shortcomings of the coding rate distortion model in traditional video coding,considering the characteristics of equal rectangular omnidirectional video,a method of omnidirectional video coding rate distortion optimization based on spherical weighted structural similarity (WS-SSIM) was proposed.By considering the distortion of the internal structural similarity of the projection plane and the relationship between the spherical distortion and the projection plane distortion,the “spherical weighted structural similarity” was proposed to describe the degree of distortion of the planar omnidirectional image local block relative to the viewing sphere,which was applied to the rate-distortion optimization process of omnidirectional video coding and adaptive selection of quantization parameters to improve vision-based coding efficiency.The experimental results show that compared with the HEVC video coding standard HM16.9 test platform,the proposed method can save an average of 24.48% code rate under the same visual quality,which indicates that the method has significant performance for improving the omnidirectional video coding rate distortion performance.…”
Get full text

A Unified Spectro-Geometric-Ritz Method for Vibration Analysis of Open and Closed Shells with Arbitrary Boundary Conditions by Dongyan Shi, Yunke Zhao, Qingshan Wang, Xiaoyan Teng, Fuzhen Pang

“…All the expansion coefficients are treated equally and independently as the generalized coordinates and determined using Rayleigh-Ritz method. …”
Get full text

RETRACTED ARTICLE: A fixed support method for cryogenic silicon cavities of ultra-stable lasers for space applications by Fanchao Meng, Chaoqun Ma, Dingyi Zhang, Yue Li, Lingqiang Meng, Chengwen Xing, Jianjun Jia

“…Abstract In this paper, a fixed support method for a cryogenic monocrystalline silicon Fabry-Pérot cavity of an ultra-stable laser for space applications is proposed. …”
Get full text

On the Collocation Method in Constructing a Solution to the Volterra Integral Equation of the Second Kind Using Chebyshev and Legendre Polynomials by O.V. Germider, V. N. Popov

“…The paper proposes a matrix implementation of the collocation method for constructing a solution to Volterra integral equations of the second kind using systems of orthogonal Chebyshev polynomials of the first kind and Legendre polynomials. …”
Get full text

Monotone-Iterative Method for Solving Antiperiodic Nonlinear Boundary Value Problems for Generalized Delay Difference Equations with Maxima by Angel Golev, Snezhana Hristova, Svetoslav Nenov

“…It leads to impossibility for using the step method for explicit solving of the nonlinear difference equation. …”
Get full text

Preliminary validation for an online configuration determination method of a thin film buckling under point contact force by Yeoun-Jae Kim, Daehan Wi

“…Abstract The authors previously developed an online thin film buckling configuration determination method for a mini basket type mapping catheter prototype, which incorporates eight thin film sensor strips. …”
Get full text

A modification to the SCAR (Sequence Characterized Amplified Region) method provides phylogenetic insights within Ceratozamia (Zamiaceae) by Dolores Gonzalez Hernandez

“…In this study, a modification to the Sequence Characterized Amplified Region (SCAR) method was used to find polymorphic loci for phylogenetic analyses within Ceratozamia. …”
Get full text

Multi-objective optimization of urban logistics land: a gradient-based method approach with Wuhan city as an example by Hongzan Jiao, Shuaikang Zhang

Get full text

A numerical method for parallel calculation of the positional characteristic for error correction in a polyalphabetic polynomial modular code by I.A. Kalmykov, A.A. Olenev, N.V. Kononova, T.A. Peleshenko, N.K. Chistousov

“…This method requires fewer multiplication operations compared to the classical method of calculating this PH. …”
Get full text

Transforming Burnishing Techniques: A Novel Method to Enhance Efficiency and Surface Quality Through Tool Feed Variation by Frezgi Tesfom Kebede, Csaba Felho

“…The new method showed more steady and predictable changes of skewness than the old method during parameter changes. …”
Get full text

Estimation of Manning\'s Roughness Coefficient by the Inverse Solving Method using Observational Data (Sanij River-Yazd, Iran) by Mahtab Alimoradi, Mohammad Reza Ekhtesasi, Arash malekian

“…Results: The lowest value of the n is equal to 0.034, corresponding to a discharge of 180 m3s-1 , while the highest value of the Manningʼs roughness coefficient is equal to 0.119, corresponding to a discharge of 2.083 m3s-1 . …”
Get full text

Texture Analysis of Thyroid Nodules Using Computed Tomography: Is it a Viable Method for Objective Assessment of Thyroid Nodules? by Sefa İncaz, Ömer Tarık Kavak, Burak Kersin, Ali Cemal Yumuşakhuylu

“…The recently popularised texture analysis method allows for qualitative and quantitative evaluation by analysing the grey-level distribution and relationships within an image. …”
Get full text

A Calculation Method for Stress and Deformation of Loess Slope Retaining Piles Considering Pile-Soil Relative Displacement by LI Hao, ZHU Wuwei, DU Qinwen, YAO Yi

“…[Purposes] This work is carried out to address the significant deviation between assumed and measured earth pressure distributions in loess slopes. [Methods] The deformation and stress laws of anti-slide piles supporting loess slopes were investigated through theoretical analysis and field experiments, a calculation method for pile deformation considering pile-soil relative displacement was proposed, and further analyses of relevant influencing parameters were conducted. …”
Get full text

Evaluation of Tetrofosmin Cold Kit Fractionation Using Alternative New Method of Quality Control for Testing Radiochemical Purity by Nisha Bhatia, Rakhee Vatsa, Vandana K. Dhingra, Devinder Kumar Dhawan, Vijayta Dani Chadha

“…Materials and Methods Tetrofosmin cold kit vial was fractionated aseptically in six equal fractions and stored in vials and syringes. …”
Get full text

Estimation of groundwater recharge using the cumulative rainfall departure method for Bac Lieu province, Mekong Delta, Vietnam by Trinh Hoai Thu, Shakirov, Renat B., Nguyen Van Hoang, Tran Thi Thuy Huong, Nguyen The Chuyen, Lee, Natalia S., @ Maltceva, Elena V., Venikova, Anna L.

“…The results of the analysis by the CRD method show that the fractions of cumulative rainfall departure for Holocene (qh), Upper Pleistocene (qp3), Middle-Upper Pleistocene (qp2–3), and Lower Pleistocene (qp1) aquifers are 0.08 %, 0.18 %, 0.55 %, and 0.50 %, respectively, which only equals 1.31 % of the total rainfall. …”
Get full text

Development and Comprehensive Assessment of the Clinical Effectiveness of a Method For Cataract Phacoemulsification Based on a Single Tunnel Incision by V. D. Semykin, R. S. Bedikyan, A. Sh. Tebueva

“…Development and evaluation of the clinical effectiveness of a technique for performing phacoemulsification of cataracts (FEC) based on a single tunnel incision.Patients and methods. We observed 96 patients (96 eyes, age 58.2 ± 1.2 years, 61 men, 35 women), divided into two groups equal in age, gender and visual status: control (CG, 46 patients, 46 eyes), for whom FEC was performed using the traditional method (total incision length 4.6 mm) and the main group (MG, 50 patients, 50 eyes), for whom FEC was performed using the developed method (total incision length 2.2 mm). …”
Get full text

New method for obtaining dispersed β-Bi2O3 and possibility of thermal stabilization by introduction of Ce by Oleg I. Kaminsky, Konstantin S. Makarevich, Evgeny A. Kirichenko

“…The β-Bi2O3 obtained with this method has a surface area of 6.4 m2/g due to its developed porous structure. …”
Get full text