INCIPIENT FAULT DIAGNOSIS OF RUBBER REFINER GEARBOX BASED ON MAXIMUM CORRELATED KURTOSIS DECONVOLUTION by LENG JunFa, WANG ZhiYang, JING ShuangXi

“…In this paper,the concept of M-shift correlated kurtosis( K_C,M) was introduced,and the method of maximum correlated kurtosis deconvolution（ MCKD） was derived.Firstly,estimate interest period T of deconvolution through calculating the maximum K_C,Mvalue for the faulty signal. …”
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STUDY ON THE ACOUSTO-STRUCTURAL COUPLING OF THIN CYLINDRICAL HYDRAULIC PIPE by XIE MiaoXia, GUO Ruifeng, LI LiXia, ZHANG LinJie

“…In thin hydraulic pipes,the interaction between acoustic field in the fluid and structural wave field may results in more energy loss.In order to make clear the energy loss mechanism of this kind of cylindrical pipe,an analytic study on the acousto-structural coupling of a thin cylindrical pipe is carried out using the impedance-mobility approach（ IMA） in this work.Coupled equations for describing such acousto-structural coupling are derived from the wave equation and the dynamic equation of a cylindrical shell.In deriving the dynamic equation of a cylindrical shell,wave propagation involving distortion of the cross section is considered,which is very different from general researches about hydraulic vibration.In order to validate the IMA model developed,the acousto-structural response of a cylindrical pipe filled with air is calculated using IMA and FEA,respectively,which reveals the good agreement between IMA and FEA results.…”
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Dispatching Design for Customized Bus of Hybrid Vehicles Based on Reservation Data by Xuemei Zhou, Jiaojiao Xi, Zhen Guan, Xiangfeng Ji

“…Then, taking the lowest operating cost of the enterprise and the lowest passenger waiting cost as the optimization goal, a customized dynamic dispatching model of multiline and hybrid vehicles was established. Finally, a calculation example is designed and the genetic algorithm is used to solve the model. …”
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Natural Frequncies of Coupled Blade-Bending and Shaft-Torsional Vibrations by B.O. Al-Bedoor

“…The coupled equations of motion are linearized based on the small deformation theory for the blade bending and shaft torsional deformation to enable calculation of the system natural frequencies for various combinations of system parameters. …”
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Wake Behavior behind Turbine Cascades in Compressible Two-Dimensional Flows by Rainer Kurz

“…Such correlations are necessary as input to unsteady flow and heat transfer calculation procedures for turbomachine blades. Based on available data on wake behavior in the compressible flow behind turbine blades, the correlations presented describe the wake behavior from the trailing edge to the confluence of the wakes of adjacent blades.…”
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INFLUENCE OF THE FRICTION BETWEEN THE PLATES ON THE DETAIL STRESS OF AIRCRAFT TYPICAL JOINTS by ZHANG Sheng, HE YuTing, LI ChangFan, CHEN Tao, ZHANG HaoYu, TAN XiangFei

“…The effect of the different plate friction on the maximum von mises of the dangerous part of the joint was calculated,and the variation law of the two points strain value was analyzed,then it was concluded the reason why the maximum von mises of the dangerous part of the joint changed. …”
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ANALYSIS AND OPTIMIZATION OF DOOR’S JITTER PROBLEM OF A CERTAIN SUV ON TEST FIELD by ZHANG LiQiang, YU Shuang, HU Shuai, ZHANG Song

“…The contribution of each transfer path to the target point is calculated. The reliability of the TPA model is verified by compared the combined value of each transfer path with the experimental value. …”
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Research on Flood Forecasting Based on Double-excess Model by HU Xinwei, ZHANG Yu, ZHU Xueping, ZHAO Xuehua

“…In order to conduct the flood forecasting research of small watershed in the control basin of Lengkou hydrological station,this paper firstly process the digital elevation model (DEM) of the study area;calculates the area weight of the sub-basin by Thiessen polygon method,the runoff yield by the double-excess flow model,the overland flow through the Nash instantaneous unit line method and the flood in river course by SWAI₁,and establishes the double-excess flood forecasting model;analyzes the sensitivity of model parameters with LH-OAT method;and calibrates and verifies the model parameters for 25 historical floods with different flood levels.The simulation results reach grade B forecast precision in the period of calibration and verification,so the simulation effect is good.The research results can provide reliable reference for hydrological forecast,flood control and disaster reduction,and enrich the research experience of flood forecasting in semi-arid and semi-humid areas.…”
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Clustering perception mining of network protocol’s stealth attack behavior by Yan-jing HU, Qing-qi PEI

“…Deep stealth attack behavior in the network protocol becomes a new challenge to network security.In view of the shortcomings of the existing protocol reverse methods in the analysis of protocol behavior,especially the stealth attack behavior mining,a novel instruction clustering perception mining algorithm was proposed.By extracting the protocol's behavior instruction sequences，and clustering analysis of all the behavior instruction sequences using the instruction clustering algorithm,the stealth attack behavior instruction sequences can be mined quickly and accurately from a large number of unknown protocol programs according to the calculation results of the behavior distance.Combining dynamic taint analysis with instruction clustering analysis,1 297 protocol samples were analyzed in the virtual analysis platform hidden disc which was developed independently，and 193 stealth attack behaviors were successfully mined，the results of automatic analysis and manual analysis were completely consistent.Experimental results show that，the solution is ideal for perception mining the protocol's stealth attack behavior in terms of efficiency and accuracy.…”
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Study on Parametric Design and Manufacture of General Cylindrical Worm by Shen Zhihuang Jiang Yu'an

“…Based on Visual C++ 6.0, the software of worm design and manufacture is developed, which includes product management module, worm parameter input module, worm linear transition module, worm linear adjustment module, grinding wheel profile calculation module and processing code generation module. …”
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Research on satellite link emulation for space-ground integration information network by Yuan LIU, Hao ZHANG, Haiyang YE, Jianfeng LI, Xiaofeng WANG, Guizhu ZHANG

“…Aiming at the large scale and diverse technologies of the space-ground integration information network,it was necessary to rely on realistic satellite network scene to verify the various schemes.A method of satellite link emulation in cloud computing environment was proposed.The critical factors that affect the characteristics of satellite link were analyzed,OpenStack and STK were integrated to build an emulation platform for space-ground integration information network.Through the link modeling and calculation,the intermittence,delay and bit error rate of satellite link based on flow table rules and queue management rules can be toggled dynamically in real time.In order to improve the throughput of satellite link,satellite nodes have dynamic routing learning ability.Satellite links can be flexibly constructed and reconstructed.The experimental results show that the method can accurately emulate the satellite link,effectively guarantee the fidelity and periodicity of satellite link emulation,and facilitate the scientific research of satellite network scene.…”
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RESEARCH ON THE CHARACTERISTICS OF PHYSICAL FIELD OF MOLTEN ZINC IN HOT DIP GALVANIZING POT by SUN ShouQun, WEI ZhongShuang, DAI XiChun, LU HuaYang

“…Through the standard k-ε turbulence model and the geometric model of galvanizing pot and molten zinc,the author finds out the distribution regularities of the physical fields（ such as speed,temperature and concentration field） and the laws of these physical quantities changing with time,and determines the distribution characteristics of the vortex. The theoretical calculations can be used to predict the distribution regularity of zinc dross and the danger zone of the dross removing operation,provide important theoretical basis for the design of dross removing robot,and ensure the quality of zinc coating and improve the efficiency of dross removing.…”
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Improved spectral clustering algorithm and its application in MCI detection by Jie XIANG, Dong-qin ZHAO

“…In order to detect mild cognitive impairment (MCI) using functional magnetic resonance imaging (fMRI)，a method based on fMRI clustering was proposed fMRI data were clustered to obtain the blood oxygen level dependence( BOLD) change model of MCI patients，then abnormal patterns were used to detect disease.The traditional spectral clustering algorithm needs to calculate all of the eigenvalue and eigenvector，so time and space complexity is higher.An improved spectral clustering method was proposed which modified the similar matrix construction method and the setting method of σ and k，and then this method was applied to clustering and detection of MCI patients.To verify the performance of the proposed method，the comparison of the clustering result，classification accuracy using traditional algorithm and Nyström is also done.The comparative experimental results show that the proposed method can get BOLD pattern more accurately，the accuracy of MCI detection is higher than the other two algorithms，and the time and space complexity are less than the traditional algorithm.…”
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Parameter optimization design of reducer gears based on differential evolution algorithm by MA YuFeng, NING Xin, ZHENG YanLing, ZHAO BingHao

“…Based on linear damage theory, developed load spectrum and continuous load spectrum with low amplitude load strengthening were implemented to calculate fatigue damage. To minimize gear volume, a light-weight optimization model was established with the constraint of fatigue damage, and differential evolution algorithm was then adopted to solve the model. …”
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Design of Flight Control System for a Novel Tilt-Rotor UAV by Zaibin Chen, Hongguang Jia

“…For control design purposes, the dynamics equation is linearized around the hovering equilibrium point, and a control allocation method based on trim calculation is developed. To deal with the actuator saturation and uncertain disturbance problems for the novel TRUAV, an improved flight control law based on the combination of the robust servo linear quadratic regulator (RSLQR) optimal control and the extended state observer (ESO) is proposed. …”
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Analysis of Hydration and Optimal Strength Combinations of Cement-Limestone-Metakaolin Ternary Composite by Xiao-Yong Wang

“…Furthermore, the gel-space ratio of hydrating concrete is calculated using reaction degrees of binders and concrete mixtures. …”
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Experiment and Analysis of Gearbox Shell Vibration Modal based on DASP by Ma Weijin, Zhang Lin, Zhang Jiping, Huang Bincheng, Ge Yumin

“…Through the experiment of the vibration modal of gearbox shell,the gearbox shell vibration state is analyzed and the stability of its operation is evaluated.By using DASP（Data Acquisition& Signal Processing）software,the vibration modal of the HW25505 TCL type aluminum alloy gearbox shell is tested.By the contrast between ERA method and PloyLSCF method,the reliable 1⁴order of frequency and damping are obtained,and thus the vibration mode analysis is carried out.By using modal correlation matrix of modal to test and verify,through the comparison with calculating modal,the validity and reliability are proved.Applied DASP to vibration modal test of gearbox shell,not only the gearbox shell high order frequency,damping,vibration mode,and vibration condition can be acquired,but also the vibration problem of similar shell gearbox in operation can be solved,The theoritical basis for the improvement of the gearbox shell structure characteristics and the fault diagnosis of gearbox shell are provided,and had better promotion value in engineering practice.…”
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NONLINEAR DYNAMICS ANALYSIS OF A SINGLE-DISK FLEXIBLE RUBBING ROTOR by LIU DeQiang

“…Meanwhile,the maximum rubbing force increases significantly,and the rubbing events of the rotor system become more serious. The calculation and analysis in this paper may be helpful for avoided rubbing events and limited maximum friction in the design of single-disk flexible rotor.…”
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Design and Experiment of Mobile Assistant Robot for the Semi Disabled Elderly by Gang Li, Yujuan Wang, Fengwen Lan, Zhenjun Du, Bing Guo, Qiancheng Sun

“…According to the size distribution of human body， the size of structural components is calculated. In order to ensure that the mechanism has enough structural strength， the finite element simulation analysis of key components is carried out. …”
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Elastic-plastic Contact Analysis of the Planetary Roller Screw Mechanism by Yao Qin, Wu Liyan, Liu Geng, Ma Shangjun, Tong Ruiting

“…Conclusions can be drawn that the roller becomes a yield state prior to the screw through further analysis,and the contact stress calculation method based on the Hertz contact theory is still feasible when the load is under a range of small plastic deformation. …”
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