Projecting the Spread of COVID-19 for Germany by Jean Roch Donsimoni, René Glawion, Bodo Plachter, Klaus Wälde

“…Abstract The authors model the evolution of the number of confi rmed cases of COVID-19 in Germany. …”
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A note on orthogonal matching pursuit under restricted isometry property by Xueping Chen, Jianzhong Liu, Xianwen Ding, Hengzhen Huang

“…In this work, by investigating the relationship between the iteration number for OMP and the signal estimation error based on the restricted isometry property, the authors obtained tighter bounds on the number of iterations required to approximately recover a sparse signal with noise and exact support recovering for the noiseless cases of OMP.…”
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A Bright Entanglement and Squeezing Generated by an External Pumping Radiation in a Correlated Emission Laser by Chimdessa Gashu

“…Next, applying the resulting solutions, the mean photon number of the separate cavity modes and their crosscorrelation, smallest eigenvalue of the symplectic matrix, mean photon number, intensity difference fluctuation, photon number variance, and intensity correlation are derived for the cavity-mode radiation. …”
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Detection method for selfish routes based on the sequential probability ratio test by Qi WANG, Qingping WANG, Huaixing WANG, Zheng’an XIAO

“…According to a network model based on the sequential probability ratio test（SPRT），one detection method of selfish routes with respect to the routing functionality in wireless sensor network was developed.Through the analysis of the observed sample values of the nodes，the calculated routes evaluation values were compared with the known threshold values so as to determine whether it was selfish route.Simulation results show that the sequential sampling scheme based on the sequential probability ratio test had high detection accuracy，and the number of the required observation was greatly reduced，so it could operate faster.A merit of SPRT is that the number of observations required to test statistical hypotheses need not be determined in advance when compared to other methods based on a fixed number of observations.This allows for making prompt decision on the behavior of damage to the network，thus it can limit the scope of the damaged networks.…”
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Forecasting the COVID-19 Diffusion in Italy and the Related Occupancy of Intensive Care Units by Livio Fenga

“…This paper provides a model-based method for the forecast of the total number of currently COVID-19 positive individuals and of the occupancy of the available intensive care units in Italy. …”
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Dufour and Soret Effects on Melting from a Vertical Plate Embedded in Saturated Porous Media by Basant K. Jha, Umaru Mohammed, Abiodun O. Ajibade

“…Numerical results are obtained for the velocity, temperature, and concentration distributions, as well as the Nusselt number and Sherwood number for several values of the parameters, namely, the buoyancy parameter, melting parameter, Dufour effect, Soret effect, and Lewis number. …”
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Energy-efficient resource allocation algorithm for massive MIMO OFDMA downlink system by Ying HU, Bao-feng JI, Yong-ming HUANG, Fei YU, Lv-xi YANG

“…An algorithm is proposed for energy-efficient resource allocation scheme in massive MIMO OFDMA downlink mobile communication system.A mathematical formulation of optimization issue is provided with the objective of maximizing system energy efficiency lower bound under the minimum data rate requirement of user,meanwhile the BS uses a zero-forcing(ZF) precoding.And then for optimizing energy efficiency function,the bandwidth allocation,power allocation and the number of antenna arrays at the BS are adjusted synchronously.First,an iterative algorithm derived from optimality condition for bandwidth assignment is proposed.Second,the properties of fractional programming and convex optimization are used to maximize the energy efficiency.Specifically,both the number of antenna arrays at the BS and the transmit data rate at the user are adjusted.Simulation results show that the proposed schemes not only have less iteration number but also have good perform for system energy efficiency and throughput.…”
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Reverberation multi-source localization algorithm based on compressed sensing with dual microphones by Yi ZHANG, Juan LI, Min ZHANG

“…In traditional multi-source localization field,it is necessary to guarantee that the number of microphone is more than the number of source.To overcome this constraint,a dual-microphone multi-source localization algorithm based on CS was proposed,where the number of sound source localized successfully was more than 3.The multi-source localization was regarded as the block sparse signal reconstruction in this algorithm,and the full room impulse responses normalized were exploited to construct the compressed observation matrix in frequency domain.In reconstructed block sparse signal,the positions of non-zero blocks were corresponded to the positions of sound sources in space.The simulation shows that compared with the SRP-sub algorithm,in reverberation time 0.6s with dual-microphone,the proposed multi-source localization algorithm based on compressed sensing has higher capability which can reach 80% success rate by using 40 frequency points to localize 3 sound sources.…”
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Methods for Predicting Speed of Sound in Fatty Acid Ethyl Esters and Ethylic Biodiesels Using Gibbs Energy Additivity by Natakron Sirimongkolgal, Mana Amornkitbamrung, Suriya Phankosol

“…This study presents Gibbs energy additivity methods for predicting the speed of sound in saturated or unsaturated fatty acids, ethyl ester, or an ethylic biodiesel based on either (1) the number of carbon atoms (z) and number of double bonds (nd) of the fatty acid or (2) the saponification number (SN) and iodine value (IV) of the fatty acid. …”
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Dynamic Analysis of a Stochastic SEQIR Model and Application in the COVID-19 Pandemic by Shijie Liu, Maoxing Liu

“…In the deterministic model, the reproduction number is given, and the local asymptotic stability of the equilibria is proved. …”
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Gust Load Alleviation with Robust Control for a Flexible Wing by Xiang Liu, Qin Sun

“…In this paper, robust control laws are designed for a large flexible wing with uncertainty in Mach number and dynamic pressure. To accurately describe the aeroelastic model over a large flight envelope, a nonlinear parameter-varying model is developed which is a function of both Mach number and dynamic pressure. …”
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Digital and analog hybrid precoding technology combined with V-BLAST in multi-user massive MIMO system by Shuai ZHANG, Jinlong ZHAN, Man WANG, Minjie LI

“…In the massive MIMO system, the only full digital baseband precoding（FD-BP）scheme（such as full complexity zero forcing）requires the same number of radio frequency（RF）chains as the number of antenna elements, which leads to extreme high hardware cost, the hybrid precoding can reduce the number of RF chain heavily and approach the performance of the FD-BP, so the hybrid precoding for massive MIMO is necessary and worth studying. …”
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Theory of Tooth Profile of New Type of Movable Gear Drive Mechanism based on Cam Mechanism by Yang Yang, Sun Shoulin

“…The relationship among the number of movable teeth,the number of teeth of the shock wave and the number of teeth of the center wheel is deduced,and the feature that movable teeth should distribute uniformly is proved. …”
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Application of Kalman filtering based on sequential processing for satellite navigation by Can-hui CHEN, Xiao-lin ZHANG, Hang-yu HUO

“…In order to reduce the operational volume and ensure the real-time capability of navigation algorithm of Kalman filtering,a novel filtering method called single-satellite sequential extended Kalman filtering (S³EKF) was proposed based on extended Kalman filtering (EKF) and sequential processing,where the single-satellite was as basic filtering unit.Simulation results show that,compared with the traditional EKF method,the S³EKF method can decrease the computation load efficiently when the number of visible satellites is no less than 7,and the reduction of computation load increases with the increase of the satellite’s visible n r,the decrease will reach more than 50% when the number of visible satellites is no less than 15.On the other hand,the consistency and stability of navigation solution are good when the satellites and their number are time-vraiant in S³EKF method.…”
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TOPOLOGICAL INVARIANTS AND MILNOR FIBRE FOR \(\mathcal{A}\)-FINITE GERMS \(C^2\) to \(C^3\) by Javier Fernández De Bobadilla, Guillermo Peñafort-Sanchis, José Edson Sampaio

“…This note is the observation that a simple combination of known results shows that the usual analytic invariants of a finitely determined multi-germ \(f : (C^2 , S) → (C^3 , 0) \)—namely, the image Milnor number , the number of cross-caps and triple points, \(C\) and \(T\), and the Milnor number \(μ(Σ)\) of the curve of double points in the target—depend only on the embedded topological type of the image of \(f\). …”
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Modular representations of Loewy length two by M. E. Charkani, S. Bouhamidi

“…More precisely, we describe the K[G]-modules M such that J2M=0 and give some properties and isomorphism invariants which allow us to compute the number of isomorphism classes of K[G]-modules M such that dimK(M)=μ(M)+1, where μ(M) is the minimum number of generators of the K[G]-module M. …”
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THE IMPACT OF NETWORK TECHNOLOGIES ON THE TRANSFORMATION OF RUSSIAN HIGHER EDUCATION by Nikolai D. Klikunov

“…The author suggests reducing of the number of university teaching staff, increasing the number of students and price abatement for higher education services.…”
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Spectral deviations of graphs by Stanić Zoran

“…Our results can be interesting in the context of graphs with a fixed number of distinct eigenvalues, eigenvalue distribution, or spectral distances of graphs.…”
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Study of high-speed malicious Web page detection system based on two-step classifier by Zheng-qi WANG, Xiao-bing FENG, Chi ZHANG

“…In view of the increasing number of new Web pages and the increasing pressure of traditional detection methods,the naive Bayesian algorithm and the support vector machine algorithm were used to design and implement a malicious Web detection system with both efficiency and function,TSMWD ,two-step malicious Web page detection.The first step of detection system was mainly used to filter a large number of normal Web pages,which was characterized by high efficiency,speed,update iteration easy,real rate priority.After the former filter,due to the limited number of samples,the main pursuit of the second step was the detection rate.The experimental results show that the proposed scheme can improve the detection speed of the system under the condition that the overall detection accuracy is basically the same,and can accept more detection requests in certain time.…”
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Efficient Computation of Wideband RCS Using Singular Value Decomposition Enhanced Improved Ultrawideband Characteristic Basis Function Method by Wen-yan Nie, Zhong-gen Wang

“…However, the increase in the size of the targets under analysis will require a large number of incident plane waves and it will become very time-consuming to solve such numbers of the matrix equation. …”
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