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| 1 | Geometry deviation effects of railway catenaries on pantograph– catenary interaction: a case study in Norwegian Railway System显示文摘This paper presents a non-contact measurement of the realistic catenary geometry deviation in the Norwegian railway network through a laser rangefinder.The random geometry deviation is included in the catenary model to investigate its effect on the pantograph–catenary interaction.The dispersion of the longitudinal deviation is assumed to follow a Gaussian distribution.A power spectrum density represents the vertical deviation in the contact wire.Based on the Monte Carlo method,several geometry deviation samples are generated and included in the catenary model.A lumped mass pantograph with flexible collectors is employed to reproduce the high-frequency behaviours.The stochastic analysis results indicate that the catenary geometry deviation causes a significant dispersion of the pantograph–catenary interaction response.The contact force standard deviations measured by the inspection vehicle are within the scope of the simulation results.A critical cut-off frequency that covers 1/16 of the dropper interval is suggested to fully describe the effect of the catenary geometry deviation on the contact force.The statistical minimum contact force is recommended to be modified according to the tolerant contact loss rate at high frequency.An unpleasant interaction performance of the pantograph–catenary can be expected at the catenary top speed when the random catenary geometry deviation is included. | Yang Song Tengjiao Jiang Petter Navik Anders Rønnquist | 2021 | Railway Engineering Science2021，29，4： | 2 |
| 2 | Design of free space optical omnidirectional transceivers for indoor applications using non-imaging optical devices 显示文摘 | AGRAWAL Navik DAVIS Christopher C | 2008 | Free-Space Laser Com- munication Technologies VIII2008，7091，70： | 1 |
| 3 | Pebax/TSIL blend thin film composite membranes for CO_2 separation显示文摘In this study a thin film composite(TFC) membrane with a Pebax/Task-specific ionic liquid(TSIL) blend selective layer was prepared. Defect-free Pebax/TSIL layers were coated successfully on a polysulfone ultrafiltration porous support with a polydimethylsiloxane(PDMS) gutter layer. Different parameters in the membrane preparation(e.g. concentration, coating time) were investigated and optimized. The morphology of the membranes was studied by scanning electron microscopy(SEM), while the thermal properties and chemical structures of the membrane materials were investigated by thermo-gravimetric analyzer(TGA), differential scanning calorimetry(DSC) and Fourier transform infrared spectroscopy(FTIR). The CO_2 separation performance of the membrane was evaluated using a mixed gas permeation test. Experimental results show that the incorporation of TSIL into the Pebax matrix can significantly increase both CO_2 permeance and CO_2/N_2 selectivity. With the presence of water vapor, the membrane exhibits the best CO_2/N_2 selectivity at a relative humidity of around 75%, where a CO_2 permeance of around 500 GPU and a CO_2/N_2 selectivity of 46 were documented. A further increase in the relative humidity resulted in higher CO_2 permeance but decreased CO_2/N_2 selectivity. Experiments also show that CO_2 permeance decreases with a CO_2 partial pressure increase, which is considered a characteristic in facilitated transport membranes. | Zhongde Dai Lu Bai Karoline Navik Hval Xiangping Zhang Suojiang Zhang Liyuan Deng | 2016 | Science China Chemistry2016，59，5： | 1 |
| 4 | The bursicon gene in mosquitoes:an unusual example of mRNA transsplicing显示文摘 | Robertson HM Navik JA Walden KKO Honegger HW | | 0，，2： | 1 |
| 5 | The bursicon gene in mosquitoes:an unusual example of mRNA transsplicing显示文摘 | Robertson HM Navik JA Walden KKO Honegger HW | | 0，，： | 1 |
| 6 | Dynamic assessment of existing soft catenary systems using modal analysis to explore higher train velocities: a case study of a Norwegian contact line system显示文摘 | RNNQUIST A NAVIK P | 2015 | Vehicle System Dynamics2015，53，6： | 1 |
| 7 | Influence of dielectric barrier discharge treatment on mechanical and dyeing properties of wool显示文摘Physical and chemical properties of wool surface significantly affect the absorbency,rate of dye bath exhaustion and fixation of the industrial dyes.Hence,surface modification is a necessary operation prior to coloration process in wool wet processing industries.Plasma treatment is an effective alternative for physiochemical modification of wool surface.However,optimum processing parameters to get the expected modification are still under investigation,hence this technology is still under development in the wool wet processing industries.Therefore,in this paper,treatment parameters with the help of simple dielectric barrier discharge plasma reactor and air as a plasma gas,which could be a promising combination for treatment of wool substrate at industrial scale were schematically studied,and their influence on the water absorbency,mechanical,and dyeing properties of twill woven wool fabric samples are reported.It is expected that the results will assist to the wool coloration industries to improve the dyeing processes. | Rahul NAVIK Sameera SHAFI Md Miskatul ALAM Md Amjad FAROOQ 林丽娜 蔡映杰 | 2018 | Plasma Science and Technology2018，20，6： | 0 |
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