Indexation of Fixed-Income Portfolios to the IMA-B by Emilio Ricardo Carvalhais, Antonio Marcos Duarte Júnior

“…This study considers the problem of indexing fixed-income portfolios to the ANBIMA Market Index – Series B (IMA-B), composed of Brazilian National Treasury Notes – Series B (NTNBs). We propose a mathematical model that minimizes the deviations of the returns of the chosen portfolio in relation to the returns of the index’s theoretical portfolio. …”
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MULTIFREQUENCY PHASE METHOD OF RANGE MEASUREMENTS by O. N. Shinkaruk, V. R. Liubchyk, M. O. Lantvoit

“…The results of the passage of harmonic probing signals in probing the objectives are shown. Obtaining the mathematical model describing the relationship are shown. …”
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Thermal detection of a prevascular tumor embedded in breast tissue by Ephraim Agyingi, Tamas Wiandt, Sophia A. Maggelakis

“…This paper presents a mathematical model of heat transfer in a prevascular breast tumor. …”
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Biosensor response to multi-component mixtures statistical analysis and forecasting by Romas Baronas, Sigitas Būda, Feliksas Ivanauskas, Pranas Vaitkus

“…The main task is to build a mathematical model for estimation the concentration of each mixture component from the biosensor response data. …”
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Optimization of Asynchronous Electric Generator Parameters in System Wind Power Installations by Yu. V. Makosko

“…The paper considers a wind power installation with asynchronous electric generator which is integrated in large power system. Mathematical model describing a wind motor, an asynchronous generator, step-up transformers, cable and open-air electric power lines has been used to obtain linear polynomials. …”
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Research on the mobile CDN architecture and the resource scheduling method by Su-fen LI, Yun-yong ZHANG, Bing-yi FANG, Lei XU, Wei XIONG, Jun WU

“…Aimed at network architecture of mobile core network,the deployment method of MCDN service nodes was discussed on the basis of virtualized core net resources and proposes a MCDN network architecture based on the core net resource pool.Then,according to collaborative problem of MCDN resources,a MCDN resource scheduling algorithm based on regional resource co-allocation was proposed,establish a mathematical model of goal programming based on multi-factor resource co-allocation was extablished.Finally,a case study is conducted to demonstrate the feasibility and effectiveness of the proposed approach.…”
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Existence of Optimal Control for a Nonlinear-Viscous Fluid Model by Evgenii S. Baranovskii, Mikhail A. Artemov

“…We consider the optimal control problem for a mathematical model describing steady flows of a nonlinear-viscous incompressible fluid in a bounded three-dimensional (or a two-dimensional) domain with impermeable solid walls. …”
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Accurate Tooth Surface Modeling and Meshing Simulation of Helical-face gear Pair with Linear Contact Cross Axis by Li Jingcai, Xu Wenli, Ma Junfang, Yang Jiafu, Man Jia, Liu Qian

“…Based on the meshing theory, the mathematical model of the tooth surface of the helical-face gear with cross axis is established, and the discrete data points of the tooth surface are calculated. …”
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STUDY ON GAS FILM THICKNESS OF AIR CUSHION BELT CONVEYOR by ZHU XiaoLong, RUI YanNian, ZHU HaiMin

“…With establishing gas film mathematical model,the theory of gap flow and experimental test,the gas film thickness of air cushion belt conveyor was analyzed. …”
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Analysis of slotted p-detection multi-channel and random multi-access protocol for wireless communication network by LIU Bin-bin, ZHAO Dong-feng, DING Hong-wei

“…Furthermore, a mathematical model was used to analyze the throughput of SPMRM protocol. …”
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Kinematics Analysis of a Two-wheeled Robot on a Sphere by Lu Chenxi, Zhang Wenzhi, Chen Fumin

“…The trajectory and velocity of the robot on the spherical surface are obtained，and then the mathematical model of the robot's motion on the spherical surface is established. …”
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Research of the Dynamic Characteristic of the Front End Accessory Drive System of Automobile Engine Considering OAP by Wang Erhua, Wu Bo, Hu Youmin, Yang Shuzi

“…The dynamic characteristics of the front end accessory drive（ FEAD） system of automobile engine can affect the noise,vibration and harshness,and the safety,comfort of automobile directly. A mathematical model of nonlinear rotational vibration of FEAD system with an overrunning alternator pulley（ OAP） is established. …”
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Comparative analysis of flat multi-element electric field strength sensors with round base and various design features by S. V. Biryukov, E. G. Glukhoverya, A. V. Tyukin

“…For this, a generalized mathematical model of the sensor is compiled taking into account its design parameters which affect the error from field inhomogeneity and the spatial range of measurement. …”
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Study on Strength Variation of Permeable Concrete Based on Differential Calorimetry Method and Multi-Index Test by Sanqiang Yang, Meng Guo, Shichao Duan, Na Liu, Haonan Wu, Erxia Du, Meichen Liang

“…Moreover, the open gradation of pervious concrete mix ratio design is selected, and the cement content should be within the range of 20%–25%. (3) The mathematical model of permeability coefficient and porosity ratio of permeable concrete is established: k=−0.0003n2+0.0057n−0.0044; the mathematical model of permeability coefficient and compressive strength of open-graded pervious concrete: k=0.99006−0.05389c+8.02×10−4c2. …”
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Fuzzy Reliability Optimal Design of Multi-stage Planetary Gear Train with Multi-objective by Hao Liping

“…The problem of randomness and fuzziness of mechanical design could effectively dealed with through the fuzzy reliability optimization design which established by the combination of fuzzy mathematics method and mechanical optimization technique.Taking the multi-stage planetary gear train as research object,the optimization and allocation of transmission ratio is implemented by the conventional optimization design method.On this basis,taking the fuzzy reliability constraints as the main constraint condition,the volume,transmission efficiency and contact ratio as object,the multi-objective fuzzy reliability optimization mathematical model is established.Then the fuzzy reliability optimization design is transformed into conventional reliability optimization design through the multistage fuzzy comprehensive evaluation,and the optimization design is carried out by using Matlab optimization toolbox.…”
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PROSPECTS FOR THE SECOND WAVE OF THE GLOBAL FINANCIAL AND ECONOVIC CRISIS by V. F. Artyushkin

“…Procedure of an economic and political situation current through the situation at the world oil marketforecasting is offered in the article. The compact mathematical model of cycling market fluctuations is the basis of thetechnique. …”
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Energy dissipation and storage in iron under plastic deformation (experimental study and numerical simulation) by A. Kostina, A. Iziumova, O. Plekhov

“…Dissipation and stored energies was calculated from processed experimental data of the surface temperature obtained by infrared thermography. An original mathematical model describing the process of mesoscopic defects accumulation was used for numerical simulation of the quasistatic loading of iron samples and for calculation of theoretical value of the stored energy. …”
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DESIGN OF STEERING SYSTEM FOR AUTONOMOUS VEHICLE by LI XueYun, ZHANG Ju, CHEN XiaoBing

“…In order to achieve the purpose of automatic steering of autonomous vehicles,the vehicle steering system is designed to meet both the driver’s driving and the vehicle’s automatic driving conditions,key parts of the system are selected and designed; The mathematical model of the steering system is established according to different driving conditions,and simulated in Matlab/Simulink environment. …”
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Research of Cycloidal Pump for Hybrid Transmission（E-CVT） by Shi Chongshi, Yan Chenxi, Huang Mingyu, Ni Hongjun

“…The oil pump equipped with E-CVT has the function of providing cooling lubrication flow and brake flow.In order to study the use characteristics of cycloidal pump as the power source of E-CVT hydraulic system，the mathematical model is established based on theoretical analysis，and the multi-domain simulation model including signal domain，hydraulic domain and mechanical domain is built by AMESim platform.The model is verified by experimental data.Based on the simulation model，the effects of oil temperature，rotation speed and load pressure on volumetric efficiency and flow characteristics are dynamically studied.At the same time，the low oil temperature start failure of the oil pump in the E-CVT is predicted by the model connection filter，oil sump and pipeline，which provides a reference for the subsequent fuel pump motor related strategy design.…”
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Calculation Method of Transmission System Time Between Overhaul with Considering Running Time by Wenbin Pan, Weizhen Liu, Huaipeng Li

“…By establishing the mathematical model of helicopter transmission system running time and flight time, engine working time, the time ratio relation between running time and flight time is deduced, that is, conversion coefficient. …”
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