Tooth Contact Analysis and Experimental Verification of Oerlikon Cycloidal Hypoid Gear by Du Jinfu, Fang Zongde, Yue Guiping, Gao Hongbiao, Zhao Guorui

“…To avoid the complicated derivation of the surface curvatures and the relative curvatures which general used to calculate the boundaries and the major axes of the contact ellipses in the past,a modified tooth contact analysis（ TCA） model is proposed which based the equations of the two mated tooth surfaces and need not to make secondary approximation,so it can correctly simulating the characteristics of the instantaneous contact area. …”
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Stereotypes and Trauma: Germany in John Hawkes’s The Cannibal and Walter Abish’s How German Is It by Theophilus Savvas

“…The two texts are brought together because the fictional versions of Germany they represent are constructed via a calculated employment of stereotyped images of the country. …”
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Algorithm based on randomly assigning filters to reduce PAPR in GFDM system by Miao ZHANG, Xianzhong XIE, Lei WU, Weijia LEI

“…As an alternative of the fifth generation mobile communication system waveforms,generalized frequency division multiplexing(GFDM)which has more advantages over OFDM has been trusted into the limelight.Nevertheless,GFDM still suffers from a high peak to average power ratio(PAPR).Considering that different filters have their own phase-frequency characteristics,a new algorithm based on randomly assigning filters to reduce PAPR in GFDM(RAF-GFDM)was proposed.According to the feature of GFDM system that the filter structure could be selected flexibly,different filters were assigned to subcarriers randomly to adjust the phase congruency due to signals superimposition.Additionally,this method can suppress PAPR effectively without causing signal distortion.Theoretical analysis and simulation results demonstrate that the proposed algorithm does not bring additional calculation costs while reducing PAPR and almost has no effect on the bit error rate(BER),and it may provide a higher application value.…”
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Study on the Effects of Main Error Factor on the Transmission Characteristic of RV Reducer by Zhao Daxing, Yuan Kang, Wu Zhenyu, Chen Shaonan

“…The three-dimensional parametric models of RV reducer are constructed by using SolidWorks software,and then the model is imported into ADAMS software,a batch of dynamic models are established and simulated by macro program,and the exporting data of rotation speed and rotation angle is imported into Matlab.After data processing,the transmission error and the fluctuation of rotation speed that is the variance of the rotation speed are calculated. The simulation result shows that under the condition of the variation of error value is the same,decreasing the radius of gear pin and increasing the value of modification of positive equidistance,the value of fluctuation of rotation speed will increase greatly,increasing the value of the modification of negative moved distance and modification of negative equidistance, it will decrease less. …”
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DYNAMIC CHARACTERISTICS ANALYSIS OF SPHERICAL HYBRID SLIDING BEARINGS by JI DongSheng, SHEN JingFeng, CHEN YuFei, ZHOU YiHao

“…Taking spherical hybrid sliding bearings as the research object, established the mathematical model of lubrication analysis of spherical sliding bearings, the dynamic liquid lubrication equation under laminar flow was derived by the perturbation method, the partial differential equation of disturbance pressure was solved by the finite difference method, and the liquid was calculated numerically. The stiffness coefficient and damping coefficient of the spherical bearing were used to study the influence of the bearing speed, eccentricity, average oil film clearance and other parameters on the dynamic characteristic coefficient of the bearing through numerical analysis. …”
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PRODUCTIVITY ANALYSIS OF SPLIT STONE PRODUCTION USING OBJECTIVE MATRIX (OMAX) METHOD (A Case Study) by Indro Prakoso

“…Based on this, this study aims to analyze the calculation of productivity to identify what factors cause the productivity of split stone production to fluctuate. …”
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Cooperative coevolution algorithm with covariance analysis for differential evolution by Bin WANG, Lu REN, Xiaofan WANG, Yajuan CAO

“…With the increase of the number of decision variables, cooperative coevolution algorithm is easy to fall into local optimization in the process of searching the global optimal solution in large-scale high-dimensional optimization problems.Based on this, a cooperative coevolution algorithm with covariance analysis for differential evolution was proposed.After the optimization problems were grouped according to the correlation between the decision variables, the correlation between the internal variables of the subcomponents would affect the population evolution process.In the process of subcomponent optimization, covariance was used to calculate the characteristic vector of population distribution, and the correlation between variables was eliminated through coordinate rotation, which effectively avoided falling into local optimization in the process of population search and speeded up the optimization speed of the algorithm.Comparative experiments were carried out on the CEC 2014 test suite.The experimental results show that the proposed algorithm is feasible.…”
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Thermal degradation in Carrara marbles as the cause of deformation of cladding slabs by A. Spagnoli, M. Migliazza, M. Zucali, A.M. Ferrero

“…In the present paper, a theoretical model to calculate the progressive bowing of marble slabs submitted to temperature cycles is briefly recalled and applied to a specific Carrara marble sample. …”
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The Optimization Analysis of Sports Industry Experience Consumption Ability under the Theory of Aesthetic Economy by Rongrong Wang

“…MATLAB simulation results show that the accuracy of the calculation results of the improved algorithm proposed in this study is more than 95%, and the fit between consumption ability evaluation indexes is more than 98%, which is better than the traditional algorithm as a whole. …”
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Phaseless Spherical Near-Field to Far-Field Transformation Algorithm via Sparsity of Spherical Mode Coefficients by Jiaqi Wang, Yinghong Wen, Dan Zhang, Jinbao Zhang

“…To improve the recovery performance of the algorithm, a spherical sampling strategy matching with the algorithm is also presented. By calculating the correlation of the measurement matrix and comparing the accuracy of the reconstructed far field, a set of optimal parameter settings including the number of spheres, the distribution of the measurement points, radius difference, and polarization mode is determined. …”
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Analysis on waypoint-segment routing and performance evaluation for LEO satellite networks by Xin ZHAO, Guang ZHAO, Rui CHEN, Wennai WANG

“…A waypoint-segment routing (WSR) algorithm was proposed.Based on the predictable periodicity of the topological changes of satellite network, the location of satellite waypoints based on the link state of satellite nodes at the current moment was determined by WSR algorithm.The mechanism of flexible planning of packet transmission paths was responded by segment routing to changes in satellite network topology in advance, and a packet transmission path that was not affected by network topology snapshot switch was calculated.Simulation experiment was based on the NS-3, and the optimized link state routing (OLSR) algorithm and the shortest path algorithm were selected to compare with WSR in order to analyze the delay jitter and packet loss rate.It was proved that compared with OLSR, the maximum delay jitter of WSR was reduced by 46 ms and 126 ms respectively in the two scenarios, the packet loss rate was reduced by 30% and 21% respectively, and the problem of packet transmission path interruption caused by topology snapshot switching can be solved.…”
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Influence of Walker Curve Tooth Root Modification on Thermoelastic Grease Lubrication Characteristics of Large Internal Gears by Wang Zhenbo, Zheng Peng, Zhao Wenhui

“…According to the meshing law and engineering experience of internal meshing gear pairs, the tooth profile between pinion base circle and pitch circle is determined as an example, the tooth profile curve after modification is parameterized, the calculation model of tooth surface oil film thickness is established, and the lubrication state of modified tooth profile is numerically analyzed. …”
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Damage Identification of Unreinforced Masonry Panels Using Vibration-Based Techniques by Claudio Oyarzo-Vera, Nawawi Chouw

“…Numerical simulations were employed to determine the modal response at several damage states and this data was used to calculate the damage indicators. Those indicators presenting a good performance were then applied to identify damage on a physical specimen tested in the laboratory. …”
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ANALYSIS ON VIBRATION MODAL OF U-BIMETALLIC FINNED TUBES by MA TengFei, GUO JianYing, SHA FengHuan

“…U-bimetallic finned tube is a new widely used heat exchange component.In order to predict and control the flowinduced vibration damage of U-bimetallic finned heat exchange tubes,their natural frequencies must be calculated accurately.Inplane and out-of-plane vibration modal of U-bimetallic finned tubes were investigated by means of the hammering method and finite element method.The influence of arc bending radius R of U-bimetallic finned tubes on their natural frequencies was analyzed.The finite element simulation results of natural frequencies of U-bimetallic finned tubes were compared with the measured values for free-free boundary condition,the maximum error of the first 18 order frequencies is 7.3%.The natural frequencies of U-bimetallic finned tubes decrease with increasing the arc radius R for clamped-hinged case.…”
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Radiation Shielding Properties Comparison of Pb-Based Silicate, Borate, and Phosphate Glass Matrices by Suwimon Ruengsri

“…Theoretical calculations of mass attenuation coefficients, partial interactions, atomic cross-section, and effective atomic numbers of PbO-based silicate, borate, and phosphate glass systems have been investigated at 662 keV. …”
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Study on the Dynamics of 2-GRR(FR)/GRR Parallel Deflection Platform by Xu Yongshuai, Chen Chun, Wang Jiawei, Xu Huiru

“…The dynamics model of the platform is derived by New-Euler method，and the dynamic model is used to calculate the parallel drive bidirectional deflection platform. …”
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Markov game modeling of mimic defense and defense strategy determination by Xingming ZHANG, Zeyu GU, Shuai WEI, Jianliang SHEN

“…Network mimic defense technology enhances the robustness of active defense through the redundancy,dynamic and diversity as well as the decision feedback mechanism.However,little work has been done for its security assessment and existing classic game models are not suitable for its dynamic characteristics and lack of universality.A Markov game model was proposed to analyze the transfer relationship between offensive and defensive status and the measurement method of safety and reliability of mimic defense,and calculated the offensive and defensive game equilibrium through non-linear programming algorithm to determine the best defensive strategy considering performance.Experiments give a comparison with the multi-target hiding technique and shows that the mimic defense has a higher defensive effect.Combining with the specific network case,the specific attack and defense path for the exploit of the system vulnerability is given and the effectiveness of the defense strategy algorithm is verified.…”
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Evaluation of the Coordination Degree Between the Socio-economic and Water Resources System in Guangdong Province by LIU Bingjun, HUANG Rui, YU Haixia, RAN Xiaolu, YANG Fang, WAN Donghui, HU Xiaozhang

“…The following conclusions aredrawn: ① Based on the conception of coupling function, the degree of coupling coordinationbetween the two systems is accurately quantified by calculating the relative distance between thesocio-economic system and the water resource system; ② During the study period, the coordinationdegree of the combined system shows an overall increasing trend. …”
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Research on the Infl uence of Earth Station Tracking Modes on Frequency Compatibility Evaluation Between NGSO-GSO Systems by Xiujuan YAO, Suhui DONG, Xiang GAO, Jing WANG, Jia ZHI, Yunlong SUN

“…Aiming at the simulation analysis scenarios of frequency compatibility between NGSO constellation system and GSO satellite system in the Ka uplink and Ku downlink frequency band, one tracking mode of the earth station of NGSO constellation was proposed.By calculation results analysis, the quantitative infl uence was depicted in common tracking mode of the earth station, such as ephemeris guided tracking, single pulse automatic tracking, and sidelobe tracking.And taking the parameters registered on ITU of Telesat and CHNSAT-98E systems as an example, the simulation data was compared and analyzed in diff erent tracking modes of the earth station.Then, one available tracking strategy of the NGSO constellation station was proposed, which is under the constraint of recommendation ITU-R S.1323.The research results can be used as a reference for NGSO-GSO system compatibility analysis, also the tracking plan formulation of earth stations.…”
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MAGNETOELASTIC NATURAL VIBRATION OF CONDUCTIVE CIRCULAR PLATE IN CURRENT-CARRYING COILS by XU HaoRan, HU YuDa, LI WenPing

“…By setting of a displacement function and using of Galerkin method,the magnetoelastic axisymmetric vibration differential equation of the plate and the expression of the natural frequency were obtained. By calculation examples,the curves of magnetoelastic natural vibration characteristics of the circular plate with clamped boundary condition and simply supported boundary condition were drawn. …”
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