A RESEARCH ON LOAD SPECTRUM STATISTICAL ANALYSIS OF T100C TRAIN BOGIE BASED ON KERNEL DENSITY ESTIMATION ALGORITHM by GAO YanJie, YANG YongFa, CHEN Jiong, YANG CanYu

“…Traditional train load spectrum statistics are all based on actual measurements,using Weibull distribution to fit test results and calculate load at different levels. But the required testing mileage is long and the entire process is timeconsuming. …”
Get full text

Experimental investigation on the formation mechanism of the TiFe alloy by the molten-salt electrolytic titanium concentrate by Shi R., Bai C., Hu M., Liu X., Du J.

“…According to thermodynamic calculation, the principal electroreduction products are Ti and TiFe2 and then Ti and TiFe2 are formed by interdiffusion which is governed by temperature.…”
Get full text

Radiative Decay Widths of Ground and Excited States of Vector Charmonium and Bottomonium by Hluf Negash, Shashank Bhatnagar

“…With these input parameters so fixed, the radiative decay widths of ground (1S) and excited (2S,3S) states of heavy vector quarkonia (J/Ψ and Υ) are calculated and found to be in reasonable agreement with data.…”
Get full text

Earthquake Response Analysis of Tall Reinforced Concrete Chimneys considering Eccentricity by Yingchun Jiang, Tielin Liu, Yikui Bai

“…The equations of dynamic equilibrium of the investigated lumps are derived, and the numerical calculation procedure is implemented. Phenomena of eccentricity are studied for 150 m and 210 m RC chimneys. …”
Get full text

High-speed hardware architecture design and implementation of Ed25519 signature verification algorithm by Yiming XUE, Shurong LIU, Shuheng GUO, Yan LI, Cai’e HU

“…Aiming at the high performance requirements of signature verification for specific scenarios such as blockchain, a high-speed hardware architecture of Ed25519 was proposed.To reduce the number of calculations for point addition and point double, a multiple point multiplication algorithm based on interleaving NAF was conducted by using pre-computation and lookup tables.The modular multiplication operation was realized by using the Karatsuba multiplication and fast reduction method, and the point addition and point double operation was designed without modular addition and subtraction, which could effectively improve the performance of point addition and point double.Given that modular exponentiation was the most time-consuming operation in the decompression process, a new modular exponentiation approach was developed by parallelizing modular inverse and modular multiplication, and therefore the performance of the de-compression operation could be improved.The proposed architecture fully considers the use of resources and is implemented on the Zynq-7020 FPGA platform with 13 695 slices, achieving 8 347 verifications per second at 81.6 MHz.…”
Get full text

Influence of Non-uniform Wear on Modal Characteristics of Spur Gears by Kaiwen Lu, Juan Zhao, Jie Sun, Menghua Tan, Songnian Liu

“…Based on Hertz contact theory and Archard formula， a quasi-static wear model is established to simulate the wear of gear tooth surfaces. The calculation results show that the wear at the top and root of the driving and driven gears is larger， the wear at the top is smaller than that at the root， the wear at the root of the driving gears is the largest. …”
Get full text

SIMULATION ANALYSIS OF RV REDUCER BOLT FORCE by DONG Wei, HAN Ju, WANG XiaoHu, ZHANG FuShuai

“…Mechanical analysis of each component of the whole machine. Calculate the force of the bolt in theory; Considering the modification of the cycloidal wheel and the diameter error of the center circle of the pin tooth. …”
Get full text

Analysis of the Fluid Cavitation Effect of Friction Pair on Double Arc Groove Hydro-viscous Drive by Ren Zhong, Zhang Hong, Liu Qiuzu

“…Taking the double arc groove hydro-viscous drive which uses fiction plate as the research object,the Fluent fluid analysis software is used to calculate the fluid cavitation effect of friction pair,the influence of rotation speed and fluid viscosity on cavitation zone is analyzed,as well as before and after oil film bearing capacity changes,the results show that the shape of cavitation zone is like vertical long strip,the cavitation starts from the outside radius direction,and becomes more significant along the radius increasing direction. …”
Get full text

Analysis of packet loss rate based on the measured traffic by Ting MI, Wei DING

“…The packet loss rate is one of key indicators to evaluate the performance of network.A method for calculating packet loss rate in the measured data based on the intact TCP flows was presented.Based on the measured data,the packet loss rate of Jiangsu Province in CERNET network and different partitions outside was analysed.The algorithm gives the packet loss rate including first packet loss rate p_fl,overall packet loss rate p_sland retransmission rate p_rp.Through statistical analysis,p_flis smaller than p_slin the vast majority of cases,and p_rpis significantly higher than p_fland p_sl,which proves the impact of packet loss on the performance of network,and retransmission rate is obviously higher than packet loss rate.…”
Get full text

EXPERIMENTAL STUDY ON CUTTING ENERGY CONSUMPTION OF COAL MINING UNDER DIFFERENT WORKING CONDITIONS by HAO ZhiYong, ZHOU ZhengQi, ZHANG Pei, YANG QuanChun

“…Pin and idler axle load data, and finally through the different conditions of coal miners cutting energy consumption calculation, the following conclusions: to keep the other conditions remain unchanged, the linear cutting energy consumption with With the increase of the traction speed increase; the oblique cut cutting energy consumption value is far more than the straight cutting energy consumption value; shearer cutting energy consumption in addition to the speed of traction, cutting mode, but also by the impact of coal hardness, With the increase in the hardness of coal and cutting cutting energy consumption also increased. …”
Get full text

EFFECT OF MATERIAL WORK HARDENING MODEL ON THE SIMULATION PRECISION FOR SPRINGBACK by 罗云, 蒋文春, 杨滨, 王炳英

“…The mixed hardening model considers both the Bauschinger effect and transient characteristics,showing a true stress and strain,which leads to an accurate calculation of bending residual stress and springback. …”
Get full text

STUDY ON THE STRESS DISTRIBUTION OF FASTENING BOLTS OFSTEAM TURBINE CYLINDER BASED ON FINITE ELEMENT ANALYSIS by LIU ChangFu, CAI WenHe, DAI XiaoHao, CHEN Xin, DONG ShuQing, DU ShuangMing, NING YuHeng

“…The stress distribution was studied based on finite element analysis.The full screw thread and fine grid blocks were used to gain the higher calculation accuracy. It said that the stress of the screw thread was closely influenced by the stress of the mean stress of screw and the stress-strain curve. …”
Get full text

Nettree for maximum disjoint paths with length constraint in DAG by Yan LI, You-xi WU, Chun-ping HUANG, Zhi-ying ZHANG, Zhen-xiang ZENG

“…The problem of the maximum disjoint paths in directed acyclic graphs(DAG)was researched which is to find the maximum disjoint paths with length k between two given vertices.A greedy algorithm named greedy path(GP)was proposed to solve the problem.GP transformed a DAG into a nettree with depth k+1 at first.Then the number of root-leaf paths for each node of the nettree was calculated to achieve the number of total paths for each vertex of the DAG.In order to obtain an optimized disjoint path,GP selected the node in the(k+1)th level of the nettree as the current node,and searched for the optimized parent in the usable parents whose number of total paths was minimal.This process was iterated,until there was no disjoint path.The space and time complexities of GP are O(wkn(p+q))and O(kn(p+q)+n²).To evaluate the performance of GP,an algorithm which can create artificial DAG with known maximum disjoint paths was also proposed.Experimental results show that GP can get better performance than other competitive algorithms.…”
Get full text

Functions of the VAT, actual problems of administration by N. Z. Zotikov

“…Taking into account world experience, measures are proposed to improve the tax calculation mechanism. The purpose of the study is to examine the impact of tax functions, tax administration on budget revenues.…”
Get full text

Influence of Tooth Surface Geometry on Bending Fatigue Life of Face Gear by Yan Hongzhi, Wen Guangxu, Li Chao, Zhou Tengfei

“…Based on the coordinate transformation and meshing theory,the tooth surface equation of face gear is deduced.The finite element model of the different parameters（pressure angle,modulus）of face gear transmission is built,the influence of tooth face parameters on tooth root bending stresses,contact area and the distribution rule of bending stresses along the direction of tooth height and width are analyzed.Based on modified local stress-strain method,the fatigue crack initiation life in different roughness of grinding and milling tooth face is calculated.And the fatigue crack propagation life is predicted with damage tolerant design method.The results prove that the pressure angle has a great influence on the tooth face bending fatigue life,especially for the crack initiation life.A larger pressure angle is helpful to improve the tooth face bending fatigue comprehensive life.In addition,grinding method is more conducive to improve the tooth face bending fatigue life than milling method.This study provides a basis for the anti-fatigue design of face gear.…”
Get full text

Stress intensity factor for small embedded cracks in weldments by Paolo Livieri, Fausto Segala

“…In the present work, the stress intensity factor (SIF) of embedded small cracks placed at the weld toe is calculated by means of two procedures based on the Oore-Burns integral. …”
Get full text

Peristaltic Transport of a Particle–Fluid Suspension through a Uniform and Non-Uniform Annulus by K. S. Mekheimer, Y. Abd Elmaboud

“…The axial velocity of the fluid phase uf, particulate phase up and the pressure gradients have been obtained in terms of the dimensionless flow rate Q, the amplitude ratio ɸ, particle concentration C, the velocity constant V0 and the radius ratio ϵ (the ratio between the radius of the inner tube and the radius of the outer one at the inlet). Numerical calculations for various values of the physical parameters of interest are carried out for the pressure rise and the friction force on the inner and the outer tubes.…”
Get full text

Ethnomathematics: Exploration of Mathematical Consepts in Batik Udan Liris by Ira Evikasari, Adi Nurcahyo, Naufal Ishartono

“…While the algebraic sub-concept is used to calculate the results of the arithmetic sequence. And in the arithmetic sub-concept, there is the concept of number patterns in the arithmetic sequence.…”
Get full text

Preparation and characterization of long-term stable pullulan nanofibers via in situ cross-linking electrospinning by Zongjie Li, Tiandi Pan, Yuke Wu, Weimin Kang, Yong Liu

Get full text

Adsorption of Alizarin Red S onto Nano-Sized Silica Modified with γ-Aminopropyltriethoxysilane by Deliang Li, Qing Liu, Shuanglong Ma, Zhixian Chang, Ling Zhang

“…From thermodynamic studies, the values of the Gibbs' free energy (ΔG 0 ), standard enthalpy change (ΔH 0 ) and standard entropy change (ΔS 0 ) were calculated as −3.78 kJ/mol, −90.05 kJ/mol and −289.34 J/(mol K), respectively, thereby indicating that the adsorption process was spontaneous and exothermic.…”
Get full text