http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
The use of small scale model testing to compare connection methods of steel purlins
Urquhart, Stephen M.,Kavanagh, Kenneth T. Techno-Press 1998 Structural Engineering and Mechanics, An Int'l Jou Vol.6 No.5
Testing of steel roof purlins is usually performed on full scale models in large vacuum test rigs. To undertake a comparison between web cleat connected purlins and flange bolted purlins a series of tests were performed on a 1:4 small scale model vacuum test rig. Various modelling issues need to be addressed to ensure reasonable comparison with actual constructed roof framing methods but still be suitable for an economical comparison between the connection methods. Model test results were supported by, and found to be in reasonable agreement with, deflection predictions from computer models based on finite element methods. This paper discusses the testing methods adopted and the value of small scale model testing programs as a means of obtaining comparisons between framing options.
Review of Variable-flux Permanent Magnet Machines
Owen, R.L.,Zhu, Z.Q.,Wang, J.B.,Stone, D.A.,Urquhart, I. Journal of International Conference on Electrical 2012 Journal of international Conference on Electrical Vol.1 No.1
Variable-flux permanent-magnet machines (VFPM) are of great interest and many different machine topologies have been documented. This paper categorizes VFPM machine topologies with regard to the method of flux variation and further, in the case of hybrid excited machines with field coils, with regard to the location of the excitation sources. The different VFPM machines are reviewed and compared in terms of their torque density, complexity and their ability to vary the flux.
Paul D.I. Fletcher,Noel A. Roberts,Choephel Urquhart 한국공업화학회 2016 Journal of Industrial and Engineering Chemistry Vol.34 No.-
Mixtures of either a hydrocarbon wax in a hydrocarbon solvent or a long chain triacyl glyceride (TAG) in aTAG solvent show complex solubility boundary temperature hysteresis and precipitated crystal networkformation leading to gelation. For these industrially-important systems, we show how the equilibriumsolubility and its hysteresis, crystallisation kinetics and pour point temperature vary with soluteconcentration for representative examples of both hydrocarbon (n-tetracosane (C24) solute in n-heptane(C7) solvent) and TAG (tristearin (SSS) solute in tricaprylin (CCC) solvent) mixtures. The behaviour ismodelled with good accuracy; thereby providing a useful aid to formulation and process optimisation.