Development of an Energy Optimized Stirred Media Grinding Mill

The article deals with an innovative approach of combining modern simulation techniques with pilot plant testing work with the target to develop a new stirred media grinding mill. With the help of discrete element simulation various mill configurations were studied. The target was maximizing the interactions between beads and the related power consumption. Having found an optimum set-up in theory, the results were confirmed in a semi-industrial pilot mill. Based on the outcomes a robust industrial concept was engineered so as to place a new product on the market.     

惊艳数字艺术

虽然新技术和互联网占据了大部分人们日常生活的应用空间。但数字艺术仍然具有发展的信心。法国数字艺术家Miguel Chevalier将于今年的7月5日到8月31日在上海K11购物艺术中心展出他的最新数字艺术作品——The Origin of the World 201 4系列。此次展览将展出5个壮观的互动装置,观者每经过一处数字艺术装置,它就会产生独特的回应方式,展现非同一般的数字成像。     

Automatic On-Die Impedance Matching in Current Mode Off-Chip Signaling

A system for on-die automatic impedance matching in current mode off-chip signaling is described. In order to perform the automatic matching operation, an algorithm that integrates the sign of the impedance matching error and the sign of the coupling branch current is implemented. An advantage of the proposed system is that it works without interfering with the driver operation. The transistor level circuit implementation of the system is described and computational simulations with post layout extractions are presented. Also experimental results are shown in order to prove the performance of the system.     

The performance of resilient layers made from cork granulates mixed with resins for impact noise reduction

This paper analyses the impact noise reduction of resilient layers made from cork granulates with eight different sizes, mixed with polyurethane and epoxy resins. The predicted impact sound improvement index and dynamic stiffness are compared with some commercially available underlays. According to the type of binder and particle size, the acoustical cork based layers present values of the impact sound improvement index and dynamic stiffness similar to the commercial layers used in buildings.     

The moderating effect of slack resources on the relation between quality management and organisational learning

Recent literature in the field of strategic management suggests that firms must learn to combine internal competencies and resources in order to achieve competitive advantages. This paper examines how firms employ slack resources to enhance the relationship between quality management (QM) and organisational learning to obtain sustainable competitive advantages. The findings use empirical data gathered from 202 quality managers to support the hypotheses that: (1) there is a strong connection between organisational learning and QM; and (2) the relation between organisational learning and QM is moderated by slack resources.     

A study of a soft computing based method for 3D scenario reconstruction

Several recent works deal with 3D data in mobile robotic problems, e.g., mapping. Data comes from any kind of sensor (time of flight, Kinect or 3D lasers) that provide a huge amount of unorganized 3D data. In this paper we detail an efficient approach to build complete 3D models using a soft computing method, the Growing Neural Gas (GNG). As neural models deal easily with noise, imprecision, uncertainty or partial data, GNG provides better results than other approaches. The GNG obtained is then applied to a sequence. We present a comprehensive study on GNG parameters to ensure the best result at the lowest time cost. From this GNG structure, we propose to calculate planar patches and thus obtaining a fast method to compute the movement performed by a mobile robot by means of a 3D models registration algorithm. Final results of 3D mapping are also shown.     

Libxc: A library of exchange and correlation functionals for density functional theory

The central quantity of density functional theory is the so-called exchange–correlation functional. This quantity encompasses all non-trivial many-body effects of the ground-state and has to be approximated in any practical application of the theory. For the past 50 years, hundreds of such approximations have appeared, with many successfully persisting in the electronic structure community and literature. Here, we present a library that contains routines to evaluate many of these functionals (around 180) and their derivatives.Program summaryProgram title: LIBXCCatalogue identifier: AEMU_v1_0Program summary URL: http://cpc.cs.qub.ac.uk/summaries/AEMU_v1_0.htmlProgram obtainable from: CPC Program Library, Queen’s University, Belfast, N. IrelandLicensing provisions: GNU Lesser General Public License version 3No. of lines in distributed program, including test data, etc.: 87455No. of bytes in distributed program, including test data, etc.: 945365Distribution format: tar.gzProgramming language: C with Fortran bindings.Computer: All.Operating system: All.RAM: N.A.Classification: 7.3, 16.1.Nature of problem: Evaluation of the exchange–correlation energy functional and its derivatives. This is a fundamental part of any atomic, molecular, or solid-state code that uses density-functional theory.Solution method: The values of the energy functional and its derivatives are given in a real grid of mesh points.Running time: Typically much smaller than the remainder of the electronic structure code. The running time has a natural linear scaling with the number of grid points.     

A fractional calculus approach for the evaluation of the golf lip-out

Golf is a sport in which competing players need to introduce the ball into the hole using the fewest number of strikes. However, this goal can sometimes be compromised when the ball suffers from lip-out phenomenon, that is, when the ball surrounds the hole??s edge without dropping in. Although some techniques may be presented in the literature to assess golfers?? performance (e.g., evaluation of the ball??s final position to the hole), none takes in consideration the putting lip-out. With this in mind, this article proposes a correction metric based on fractional calculus that considers past events in ball??s trajectory, thus slightly increasing player??s performance when putting lip-out occurs. On the opposite of integer derivatives which are considered as ??local?? operators, fractional derivatives implicitly have ??memory?? of all past events being well suited to describe the dynamic phenomena of ball??s trajectory. Therefore, this novel correction metric will provide a new virtual position of the ball based on its trajectory induced by the putting lip-out. This metric was evaluated analyzing the performance of 10 expert subjects who performed a total of 30 trials, with the lip-out occurring in 29 out of the 300 considered. Experimental results show an average improvement of 19.6?% in trials where the lip-out occurred and an average overall improvement of 1.82?% in player??s performances, when applying the correction metric.