Catalyst with high performance has drawn increasing attention recently due to its significant advantages in chemical reactions such as speeding up the reaction,lowering the reaction temperature or pressure,and proceed...
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Catalyst with high performance has drawn increasing attention recently due to its significant advantages in chemical reactions such as speeding up the reaction,lowering the reaction temperature or pressure,and proceeding without itself being *** the superior catalytic performance of precious metal catalysts,transition metal oxides offer a promising route for substitution of precious metals in catalysis arising from their low cost,intrinsic activity and sufficient ***-type oxide SmMn_(2)O_(5) exhibits a unique crystal structure containing double crystalline fields,and nowadays is used widely as the catalyst in different chemical reactions,including the reactions of vehicle emissions reduction and oxygen evolution reaction,gas sensors,and metal-air batteries,promoting attention in catalytic perfor-mance *** our knowledge,there is no review article covering the comprehensive informa-tion of SmMn2 O 5 and its *** we review the recent progress in understanding of the crys-tal structure of SmMn_(2)O_(5) and its basic physical *** then summarize the catalytic sources of SmMn_(2)O_(5) and reaction mechanisms,while the strategies to improve catalytic performance of SmMn_(2)O_(5) are further ***,we provide a perspective on how to make further progress in catalytic applications.
Linear compressors are being widely used in a huge variety of applications due to their higher efficiency than traditional rotary compressors. The linear compressor is driven by the Linear Oscillatory Machine (LOM), a...
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The electromagnetic railgun is an advanced launch device that accelerates the armature to ultra-high speed through electromagnetic force. The contact between the armature and the two rails is a kind of ultimate slidin...
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In this paper, a parametric model of arc armature is established. And simulation models considering velocity skinning effect and pre-contact resistance are also established in this paper using COMSOL. Through this mod...
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Construction of specially shaped pile foundations by compacting the soil around the borehole with shock waves, which can effectively increase the load-bearing capacity of the pile material. The metal wire explosion in...
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electromagnetic railgun have high initial velocity, long range and other advantages. Improving the launch efficiency is one of the most important needs for the application of electromagnetic rail launch technology. Ba...
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Three optimization objectives are proposed to suppress transition during the armature launching process: the deviation rate of the current density distribution on the armature rail’s contact surface under steady-stat...
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Armature melting during electromagnetic launch affects the electrical contact characteristics between armature and rail, which in turn affects the launching process and the service life of the launcher. A coupled mult...
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Inductance gradient has a significant effect on muzzle kinetic energy and launch efficiency in electromagnetic railgun. Inductance gradient is determined by the current distribution in the armature and rail, transient...
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Disruption remains to be a serious threat to large tokamaks like the International Thermonuclear Experimental Reactor(ITER).The injection speed of disruption mitigation systems(DMS)driven by high pressure gas is limit...
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Disruption remains to be a serious threat to large tokamaks like the International Thermonuclear Experimental Reactor(ITER).The injection speed of disruption mitigation systems(DMS)driven by high pressure gas is limited by the sound speed of the propellant *** extrapolating to ITER-like tokamaks,long overall reaction duration and shallow penetration depth due to low injection speed make it stricter for plasma control system to predict the impending *** disruptions with a short warning time may be ***,a fast time response and high injection speed DMS is essential for large scale *** electromagnetic pellet-injection(EMPI)system is a novel massive material injection system aiming to provide rapid and effective disruption *** on the railgun concept,EMPI can accelerate the payload to over 1000 m/s and shorten the overall reaction time to a few *** verify the injection ability and stability of the EMPI,the prototype injector EMPI-1 has been designed and *** preliminary test has been carried out using a 5.9 g armature to propel a dummy pellet and the results suggest that the EMPI configuration has a great potential to be the DMS of the large scale fusion devices.
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