Wyniki wyszukiwania - BazTech

1

The Evolution of a High Productivity Urban e-Commerce Delivery Vehicle using Australian Performance Based Standards

Hassall Kim, Thomson Russell, Cowell Ken

Logistics and Transport

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2019

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Vol. 43, No. 3

73--79

EN

The introduction of High Productivity Vehicles (HPVs) in Australia, through the Performance Based Standards (PBS) scheme, was predicated on new mechanical engineering standards that were mandated especially for these new vehicles. These standards improved vehicle stability, general performance and safety, especially safety. Two national surveys showed both massive safety and productivity benefits compared to conventional Australian road freight fleets. The first Australian PBS vehicles operated under permits from 1997 but the formalized Australian scheme was implemented in 2006. So arguably the introduction of HPVs under permit and now under a formal regulatory PBS framework has allowed some 20 years of research observations. However, only one major type of single rigid, high productivity truck, without a trailer, has been active in an urban environment as a pilot, over that time. This paper examines this special urban High Productivity Vehicle which could be exceptionally useful for the urban freight task in many countries should they ever adopt it.

2

A polarization selective beam splitter based on a subwavelength multisubpart profile grating structure

Xiao Y., Huang L., Wu H., Sun X., Xiao W., Duan J.

Optica Applicata

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2016

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Vol. 46, nr 4

665--672

EN

In this study, a polarization selective beam splitter constructed by only a single layer subwavelength multisubpart profile grating is presented. Rigorous coupled-wave analysis is adopted to investigate the properties of the structure. It is shown that for a transverse electric polarized wave, the device demonstrates very high reflectivity (>97%) from 1.46 to 1.58 μm; and for a transverse magnetic polarized wave, at the wavelength of 1.55 μm, it exhibits about 50/50 beam ratio under normal incidence. To evaluate the response of the polarizing beam splitters under variation in structure parameters, we also investigated the fabrication tolerances of the device.

3

Preparation and Morphology of Poly(butylene succinate) Nanofibers via Electrospinning

Liu Y, He J. H., Yu J. Y.

Fibres & Textiles in Eastern Europe

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2007

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Vol. 15, no. 4 (63)

30--33

EN

An electrospinning method was used to produce Poly(butylene succinate) (PBS) nanofibres. The morphology of the fibres was studied considering fibres of different weight concentrations of PBS/CF solution and spun with different diameters of needle-orifice. The results show that the electrospinning process is very difficult and the products are only by few fibres when the weight concentration equals 8%. When the concentration is increased, the eff-iciency is high and the process becomes easy. The morphology of the fibres is more uniform when are spun with a larger diameter of the needle-orifice. The electrospinability ranges between 8 wt% and 14wt% of PBS/CF weight concentration. The thermal properties and the crystallisation of the PBS polymer pellets and electrospun PBS nanofibers were measured by differential scanning calorimetry (DSC) and wide angle X-ray diffraction (WAXD), respectively. In addition, the hydrolytic degradation behaviour of electrospun PBS nanofibres in 1N NaOH solution was observed by using scanning electron microscopy (SEM).

PL

Elektroprżedzenie zastosowano do wytworzenia nanowłókien z poli(butyleno bursztynianu) (PBS) z roztworów chlorowormu o różnej zawartości PBS i przędzionych przy użyciu igieł o różnych średnicach. Wyniki pokazują, że proces elektroprzędzenia jest bardzo trudny i można uzyskac włókna z roztworu o stężeniu 8 %wt. Kiedy stężenie wzrasta, wzrasta wydajność i proces przebiega łatwo. Istnieje możliwość elektroprzędzenia przy stężeniach 8 do 14 wt% PBS/CF. Właściwości termiczne i krystalizacja granulek PBS oraz nanowłókien PBS zostały wyznaczone przy użyciu DSC i WAXD. Ponadto, degradacja hydrolityczna nanowłokien PBS w 1N roztworze NaOH była obserwowana przy pomocy SEM.

4

Experience with PBSPro on a 4 x 512p Altix SuperCluster

Talcott D.

Computational Methods in Science and Technology

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2006

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Vol. spec. issue

61-64

EN

The Columbia project at NASA Ames includes twenty 512 processor Altix systems. Four of those systems are joined together into a Numalink based globally accessible non-coherent memory Altix SuperCluster. PBSPro 7.0 and 7.1 have been used to schedule and run work on this system. In this presentation, we will go over features of PBSPro especially applicable to such systems, some problems we have encountered and how they have been addressed, and remaining, unresolved issues.