INFLUENCE ANALYSIS OF SMALL AMPLITUDE LOAD CYCLE TO FATIGUE LIFE CALCULATION BASED ON FLIGHT PARAMETERS by XU KeJun, WANG YongQi, XIA YiRui, QIN HaiQin

“…Analyzed the speed cycles distribution of a certain type of aeroengine,calculated the influence of small speed cycles which amplitude is lower than 10% of high pressure rotor speed by Miner’s linear cumulative damage theory,compared the influence of different removal methods to damage calculation results and pointed the advantages and disadvantages of each method; Based on EGD-3 standards,put forward the extraction method of removing small cycles and verify its rationality by calculation,then define the sensitivity factor of removing small speed cycles in fatigue calculation as 0. 3% for a certain type of aeroengine.…”
Get full text

Personal or group motivation: which tool is more efficient by G. N. Ryazanova

“…The individualistic concept, based on the neoclassical economic paradigm with the assumptions of complete rationality of agents, does not always give the desired results and needs to be revised taking into account the cross-cultural characteristics of the country. …”
Get full text

Stability Domain Construction and Tuning for External Loop Controller Parameters Based on Permanent Magnet Wind Power Generation Systems by Hao Liang, Fei He, Guangtao Zhang, Chuan Qin

“…Then, based on the frequency domain performance indexes, amplitude margin and phase angle margin, the obtained basic stability domain is adjusted to further gain the control parameter values that meet the frequency domain index. Furthermore, the rationality of the stability domain range is verified by drawing root locus curves of variable controller parameters on the machine side and grid side. …”
Get full text

Application of System-level Analysis Method in Fan-driven Gearbox Test by Lü Zuopeng, Jian Luo, Jin Feng, Lulu Qian, Zhongtao Huang

“…The accuracy of the component level model is verified through the modal analysis and the percussion modal test of the gearbox component. Then the rationality of the subsystem structure analysis is verified through the comparative analysis of the dynamic response analysis and performance test of the external meshing subsystem. …”
Get full text

Design and Simulation of Bias Fork Chain Drive in Vertical Circular Stereo Garage by Wang Qi, Yan Zhengliang, Chen Yuanhua

“…The motion simulation module of software is used to simulate the trajectory curvature of the chain plate and the feasibility of the motion of the detection mechanism. The rationality of meshing of the movement of the simulated chain plate is determined. …”
Get full text

Research on Deformation Characteristics of Geomembrane in Welding of Membrane Faced Rockfill Dam by WU Xiuyu, ZHANG Xianlei, WU Yunyun

“…In order to solve the problem that the roughness and local folds of geomembrane in the meridional and zonal welds affect the welding quality,this paper carries out the experimental study on thermodynamic deformation-temperature rule of HDPE/PE/PVC geomembrane by thermal mechanical analyzer,and reveals the deformation characteristics of geomembrane in welding construction by combining the experimental study with theoretical analysis.The experimental results show that the main cause is the difference between the meridional/zonal deformation,and the essential reasons are the history of temperature stress and the orientation of molecular structure of geomembrane in the production process.After being fully fused and formed by natural cooling under unconstrained conditions,the sample is subjected to deformation-temperature test.The test results verify the rationality of the theoretical analysis.According to the results,this paper proposes to improve the production process by avoiding the orientation of molecular structure,reasonably controlling the cooling temperature rate gradient and appropriately increasing the lap width between the meridional and zonal welds to offset the different deformation caused by the remakable differenence of thermodynamic deformation characteristics.…”
Get full text

ITG 1000, Risk Detection and Accounting Information: a Theoretical Analysis on the Cost versus Benefit for Micro and Small Enterprises by Mateus Alexandre Costa dos Santos, Luiz Carlos Marques dos Anjos, Paulo Roberto Nóbrega Cavalcante, Paulo Aguiar do Monte

“…The discussion is based on the assumptions of economic rationality and assumes that individuals, under uncertainty, will behave in a manner attributable to Von Neumann-Morgenstern. …”
Get full text

Hunting for Education: ‘Archaeological’ Speculations on Critique and Paideia by Stefano Oliverio

“…This idea will be investigated by also tracking the evolution of the gesture of hunting towards the horizon which presides over the creation of the school and the form of rationality and the epistemic attitude that it embodies. …”
Get full text

TRAJECTORY PLANNING AND SIMULATION STUDY OF B-AXIS POWER TOOL HOLDER by LI XinWen, LI YuLian

“…Conclusion: The tool is moving in accordance with the trajectory law of the design,which verifies the validity and rationality of the method.…”
Get full text

Kinematics Analysis and Simulation of Cement Filling Automatic Bag Inserting Manipulators by Zhou Chongjie, Sun Yuantao

“…Finally, the design of experiment (DOE) verification experiment shows that the cement filling automatic bag inserting manipulator can accurately grasp the bag body and insert bags, which verifies the rationality of its body structure and conflicts with the limitations and low accuracy of the existing bag inserting equipment.…”
Get full text

Finite-element Stress and Deformation Analysis of a Geomembrane Face Rockfill Dam by ZHAO Yuhao, LI Zhenhua, CHEN Sining, GONG Hanzhong, LIN Wei

“…For a certain reservoir dam that is a geomembrane face rockfill dam,the composite geomembrane is used as the face slab on the dam surface to prevent seepage.A three-dimensional nonlinear finite-element model of this reservoir dam was built to simulate the dam filling construction,the laying of the composite geomembrane,and the process of reservoir impoundment.The stress and deformation of the dam body and the composite geomembrane during the completion and impoundment periods were analyzed,and the rationality of the structural design of this geomembrane face rockfill dam was demonstrated.The calculation results show that the distribution of the dam body displacement and stress before and after impoundment follows the general rules and that impoundment is beneficial to the safety of the dam.Moreover,the shear failure of the dam body is prevented.The composite geomembrane is subject to tensile strain and stress in the lower half of the face slab due to boundary constraints.Nevertheless,the lateral and longitudinal safety factors calculated meet the requirements of design specifications,and the safety of the geomembrane is guaranteed.…”
Get full text

On being uniquely human in the world: a reflection on the contributions of J. Wentzel van Huyssteen by H. Musa

“…Van Huyssteen’s life and work have revolutionised the discussion on human life, the origin of religion, the quest for religion, and the constructive sense of rationality and spirituality as important ways of understanding the meaning and function of human uniqueness in terms of the reality of the image of God (imago Dei) in human beings. …”
Get full text

Design and Analysis of Upper Limb Rehabilitation Robots with Fully-actuated Shoulder Joints by Wang Zhanli, Duan Zhifeng, Li Shuang, Gao Moyao, Pang Zaixiang

“…The simulation results show that the joint movement is stable, the torque fluctuation is small, the robot has no excessive impact on the arm, the time for the robot to perform shoulder joint adduction/abduction movement is reduced, the rationality of the design of the upper limb rehabilitation robot and the convenience of the rehabilitation process are verified.…”
Get full text

Study on the Dynamic Performance of Joint Mechanism with Considering Oil Film Lubrication Clearance by Wang Xupeng, Liu Geng, Ma Shangjun, Tong Ruiting

“…Then,taking the planar slider-crank mechanism with lubricated clearance joint as study object,through the analyzing and comparing of two working conditions of dry friction and lubrication,the rationality of the new model is verified. At the same time,through the simulation analysis of the different clearance values,the influence law of the clearance values on the dynamic performance of joint mechanism with lubrication clearance is studied. …”
Get full text

RELIABILITY ANALYSIS OF FAILURE RELATED MECHANICAL PARTS BASED ON VINE COPULA MODEL by HU QiGuo, ZHOU Song

“…The feasibility of the improved parameter Bootstrap method is verified by Matlab simulation,then the reliability of the multi-failure mode related mechanical parts is solved by using the Vine Copula model.Finally,through the comparison between the calculation example of drive shaft and other methods,the method is rationality and validity.…”
Get full text

Application Review of Comprehensive Multi-index Evaluation Methods in River Health Evaluation by YANG Xiaoyan, WANG Chi, WU Tian, XIA Tiyuan

“…To understand the current research progress and direction of comprehensive multi-index evaluation methods,and supplement the principle and method of evaluation index screening,this paper summarizes the research progress of the comprehensive multi-index evaluation method in river health evaluation at home and abroad.Firstly,the concept and evaluation principle of comprehensive multi-index evaluation are summarized from the perspective of river health evaluation objects and evaluation methods by tracing the domestic and foreign literature.Meanwhile,the three hierarchies of river health evaluation are illustrated by taking the target-criterion-index structure of river health evaluation in Yunnan Province as an example.Secondly,the current research progress of comprehensive multi-index evaluation methods and the index selection rationality are emphasized.Finally,the problems existing in the comprehensive multi-index evaluation methods are analyzed and the corresponding solutions are put forward.As a result,this paper provides references for river health management in China,and also scientific and technological support for the smooth promotion of river chief systems in various places.…”
Get full text

Design and Modeling Simulation of a New Hydro-electric Hybrid Multi-function Continuously Variable Transmission by Wuyao Gou, Tao Deng, Ping Liu, Lu Zhang, Yang Yang

“…The simulation results show that the transmission structure can realize the designed continuously variable function， and the power performance， fuel economy and emission indexes of the whole vehicle are increased by 19.8%， 36.4% and 41.9% respectively at the cost of consuming about 10% SOC， which verifies the rationality and effectiveness of the CVT design.…”
Get full text

Mechanism design for crowd sensing with data reuse based on two-sided auction by Changkun JIANG, Lin GAO

“…Crowd sensing is a promising sensing paradigm,which mainly uses a variety of embedded sensors in a large number of mobile devices to accomplish data sensing tasks.One of the key issues in crowd sensing is how to effectively coordinate mobile device users to perform multiple sensory tasks simultaneously.By introducing a new data layer between the sensing task and the user,the similarity of the sensing task and the heterogeneity of the user were effectively utilized,and the joint task selection and user scheduling problems were established on the data layer,aiming at maximizing the social welfare of the whole system.This problem was difficult to solve due to its combinatorial nature and the presence of private information on both the sensing tasks and the users.In order to deal with these problems,a two-sided randomized auction mechanism was proposed,and it was proved that it can satisfy the desirable properties of the computational efficiency,the individual rationality,and the incentive compatibility in expectation.The simulation results show that the proposed stochastic auction mechanism can achieve nearly optimal social welfare,and the social welfare benefits brought by data reuse will increase significantly with the enhancement of task similarity.…”
Get full text

DESIGN AND EXPERIMENTAL ANALYSIS OF A NONLINEAR ULTRAHARMONIC VIBRATOR EXCITER by WANG ChengJun, SHANG ChenChen, ZHANG YuPing

“…The results show that under the adjustment of the nonlinear spring, the exciter can achieve third ultraharmonic resonance, which verifies the rationality of the design of the nonlinear super-resonant exciter.…”
Get full text

Complex Network Filtering and Compression Algorithm Based on Triangle-Subgraph by Shuxia Ren, Tao Wu, Shubo Zhang

“…Experimental results show that filtering compression algorithm can not only improve the compression rate but also retain information of the original network at the same time; sorting result analysis and SIR model analysis show that the sorting result of node importance sorting algorithm has accuracy and rationality.…”
Get full text