scholarly journals Dynamic Difference-Form Contests

2014 ◽  
Vol 16 (3) ◽  
pp. 401-426 ◽  
Author(s):  
YOHAN PELOSSE
Keyword(s):  
Difference Form

scholarly journals Differences over Difference: Sino-Russian Friendship at Interstate and Interpersonal Scales

2021 ◽  
Vol 63 (3) ◽  
pp. 685-721
Author(s):  
Ed Pulford
Keyword(s):  
Eighteenth Century ◽  
Interpersonal Relationships ◽  
Scientific Work ◽  
Global Era ◽  
Cross Border ◽  
Border Town ◽  
The Everyday ◽  
Daily Interactions ◽  
Difference Form ◽  
Social Scientific

AbstractRelations between states are usually framed in human terms, from partners to rivals, enemies or allies, polities and persons appear to engage in cognate relationships. Yet whether or not official ties and relationships among people from those states actually correspond remains less clear. “Friendship,” a term first applied to states in eighteenth-century Europe and mobilized in the (post)socialist world since the 1930s, articulates with particular clarity both the promise and the limitations of harmonized personal and state ties. Understandings of friendship vary interculturally, and invocations of state-state friendship may be accompanied by a distinct lack of amity among populations. Such is the case between China and Russia today, and this situation therefore raises wider questions over how we should understand interstate and interpersonal relationships together. Existing social scientific work has generally failed to locate either the everyday in the international or the international in the everyday. Focusing on both Chinese and Russian approaches to daily interactions in a border town and the official Sino-Russian Friendship, I thus suggest a new scalar approach. Applying this to the Sino-Russian case in turn reveals how specific contours of “difference” form a pivot around which relationships at both scales operate. This study thus offers both comparison between Chinese and Russian friendships, and a lens for wider comparative work in a global era of shifting geopolitics and cross-border encounters.

Graphical-Numerical Solution of Problems of Saint-Venant Torsion and Bending

1953 ◽  
Vol 20 (3) ◽  
pp. 321-326
Author(s):  
B. A. Boley
Keyword(s):  
Cross Section ◽  
Stress Function ◽  
Arbitrary Cross Section ◽  
Successive Approximations ◽  
Shear Stresses ◽  
Shearing Stress ◽  
First Approximation ◽  
Difference Form ◽  
Bending Of Beams

Abstract A simple successive-approximations procedure for the solution of the problems of Saint-Venant torsion and bending of beams of arbitrary cross section is presented. The shear stresses in a cross section of the beam are first calculated from the formulas valid for thin-walled sections, on the basis of an assumed set of lines of shearing stress. From these a first approximation to the stress function of either the torsion or the bending problem is found. The second approximation to the stress function is then obtained from the governing equation of the problem, expressed in finite-difference form; this in turn allows the determination of an improved set of lines of shearing stress, and hence of the shearing stress itself. The procedure can be repeated until the results of two successive steps are sufficiently close. Applications are presented for a beam cross section for which the exact solutions are known, and it is shown that no further difficulties arise in applications to more complicated shapes.

Prediction of Ultimate Bearing Capacity of Half-Screwed Pile by Integrated Exponential Function Model

2013 ◽  
Vol 353-356 ◽  
pp. 881-885
Author(s):  
Jian Xiong Liu ◽  
Yan Yan Gao ◽  
Xiu Hua Li
Keyword(s):  
Bearing Capacity ◽  
Functional Model ◽  
Ultimate Bearing Capacity ◽  
Model Solution ◽  
Least Square ◽  
Single Pile ◽  
Engineering Research ◽  
Exponential Functional ◽  
Practical Engineering ◽  
Difference Form

This study fitted the measured loading-settlement curve of half-screwed pilewith least square model solution of difference form of integrated exponential functional model, and predict ultimate bearing capacity of half-screwed pile according to the fitted curve of maximum curvature point. Combined with practical engineering research, the study explored the feasibility, rationality and limitations of predicting the half-screwed single pile ultimate bearing capacity with least square model solution of difference form of integrated exponential functional model, and provided the theoretical basis for the popularization and application of the half-screwed pile.

Computer simulation of target link explosion in laser programmable redundancy for silicon memory

1986 ◽  
Vol 1 (2) ◽  
pp. 368-381 ◽  
Author(s):  
L.M. Scarfone ◽  
J.D. Chlipala
Keyword(s):  
Thermal Evolution ◽  
Three Dimensional ◽  
Heat Diffusion ◽  
Dielectric Films ◽  
Threshold Temperature ◽  
Heat Diffusion Equation ◽  
Heating Effects ◽  
Transparent Dielectric ◽  
Difference Form ◽  
Pulse Energies

Pulses of Q-switched Nd-YAG radiation have been used to remove polysilicon target links during the implementation of laser programmable redundancy in the fabrication of silicon memory. The link is encapsulated by transparent dielectric films that give rise to important optical interference effects modifying the laser flux absorbed by the link and the silicon substrate. Estimates of these effects are made on the basis of classical plane-wave procedures. Thermal evolution of the composite structure is described in terms of a finite-difference form of the three-dimensional heat diffusion equation with a heat generation rate having a Gaussian spatial distribution of intensity and temporal shapes characteristic of commercial lasers. Temperature-dependent thermal diffusivity and melting of the polysilicon link are included in the computer modeling. The calculations account for the discontinuous change in the link absorption coefficient at the transition temperature. A threshold temperature and corresponding pressure, sufficiently high to rupture the dielectric above the link and initiate the removal process, are estimated by treating the molten link as a hard-sphere fluid. Numerical results are presented in the form of three-dimensional temperature distributions for 1.06 and 0.53 μm radiation with pulse energies 3.5 and 0.15μJ, respectively. Similarities and differences between heating effects produced by long (190 ns FWHM/740 ns duration) and short (35 ns FWHM/220 ns duration) pulses are pointed out.

Modeling of Fluid Interaction Produced by Water Hammer

2011 ◽  
Vol 1 (1) ◽  
pp. 29-41 ◽  
Author(s):  
Kaveh Hariri Asli ◽  
Faig Bakhman Ogli Naghiyev ◽  
Soltan Ali Ogli Aliyev ◽  
Hoosein Hariri Asli
Keyword(s):  
Method Of Characteristics ◽  
Transient Flow ◽  
Practical Investigations ◽  
Computationally Efficient ◽  
Hydraulic Simulation ◽  
Computational Performance ◽  
Difference Form ◽  
Large Water ◽  
Water Transmission ◽  
Fluid Interaction

This paper compares the computational performance of two numerical methods for two models of Transient Flow. One model was defined by method of the Eulerian based expressed in a method of characteristics “MOC”, finite difference form. The other model was defined by method of Regression. Each method was encoded into an existing hydraulic simulation model. Results indicated that the accuracy of the methods was comparable but that the “MOC” was more computationally efficient for analysis of large water transmission line. Practical investigations in this article have shown mainly this tendency.

Experimental Estimation of Fluidization Parameters - A Stochastic Approximation Method Approach

2010 ◽  
Vol 8 (1) ◽  
Author(s):  
Bachtiyar M. Yakubov ◽  
Eduard Yakubov ◽  
Victor A. Gotlib
Keyword(s):  
Stochastic Approximation ◽  
Approximation Method ◽  
Solid Particles ◽  
Diffusion Type ◽  
Difference Form ◽  
The Difference ◽  
Process Observation ◽  
Fluidization Process ◽  
Estimation Parameters ◽  
Method Approach

The paper deals with the use of the stochastic approximation method for estimation parameters of the fluidization process and detecting a change of the process mode based on experimental photographs of local part. The fluidization process is treated as a process of diffusion type, described by the diffusive equation. Because the solid particles are essentially discrete ones and the moments of process observation are also discrete, the diffusive equation is treated in the difference form. The problem of modeling of the fluidized bed is reduced to the estimation of coefficients of difference equations system. The method of stochastic approximation is used for this estimation. The method allows identifying the regime of the fluidization process in its dynamics and estimating the parameters of the process. The approach and the estimating algorithm were verified using the especial experiments.

Dynamic-relaxation solutions of elastic-plate problems

1968 ◽  
Vol 3 (1) ◽  
pp. 23-32 ◽  
Author(s):  
K R Rushton
Keyword(s):  
Load Distribution ◽  
Damping Factor ◽  
Computer Programme ◽  
Elastic Plates ◽  
Damped Wave Equation ◽  
Dynamic Relaxation ◽  
Edge Conditions ◽  
Difference Form ◽  
Damped Oscillation ◽  
Explicit Finite Difference

The analysis of the static deformation of elastic plates is achieved by studying the dynamic problem of the damped oscillation of the plate and arranging that the oscillations are rapidly reduced to zero by a suitable choice of the damping factor. This damped-wave equation, when written in an explicit finite-difference form, can readily be solved on a digital computer. The computer programme has been designed to determine automatically the critical damping factor for a rectangular plate carrying any load distribution and with any combination of edge conditions. The extension of the method to include elastic foundations is also described.

BOUNDARY LAYER CALCULATIONS ON CYLINDERS OF RANKINE-OVAL SECTIONS

1989 ◽  
Vol 13 (3) ◽  
pp. 65-68 ◽  
Author(s):  
M. ABDULHADI
Keyword(s):  
Boundary Layer ◽  
Finite Difference ◽  
Approximate Calculation ◽  
Separation Line ◽  
Boundary Layer Equations ◽  
Finite Difference Form ◽  
Difference Form ◽  
Long Cylinder

An approximate calculation of the boundary layer parameters around a long cylinder of Rankine-oval section is carried out. The calculations are undertaken as a step-by-step analysis using the finite-difference form of the integral formulations of the boundary layer equations. The separation line of the boundary layer for an oval of thickness = 0.2 is located in the rear portion of the oval in a plane making an angle of 137° with the direction of the flow.

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