http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
Juan I. del Río,Eduardo Pérez,David León,Ángel Martín,María D. Bermejo 한국공업화학회 2021 Journal of Industrial and Engineering Chemistry Vol.97 No.-
The catalytic conversion of CO2 captured in aqueous media into formate was studied using aluminum-sourced hydrogenin a batch reaction system. To do so, themain ammonia-basedCO2absorption derivatives:ammoniumcarbamate,carbonate and bicarbonateandsodiumbicarbonatewere selectedasCO2source.Theperformance of the different species was determined under mild hydrothermal reaction conditions (120 C),using Pd/C 5 wt% catalyst. In these conditions, the formate yield and selectivity increase in the orderammonium bicarbonate < sodium bicarbonate < ammonium carbonate < ammonium carbamate. Ammo-nium bicarbonate and sodium bicarbonate reagents needed higher temperature (250 C) for an increasedyield. Results with ammonium carbamate as starting material indicate a significant effect of time andcatalyst content on formate yield, which ranged between 4 and 38%. Experiments with gaseous H2 showedthat a comparable yield with Al can be obtained at a similar level of pressure. The reutilization andcharacterization of the reaction solid, comprising exhausted aluminum and Pd/C catalyst, showed that thealuminum was not completely oxidized up to the 5th re-use, and Pd can play a reducing role through theformation of palladium hydride species. The process can be improved by operating at higher pressure andlower temperature, to avoid loss of yield by dehydration of formate.
Output-Feedback Adaptive Control for the Global Regulation of Robot Manipulators with Bounded Inputs
Daniela J. López-Araujo,Arturo Zavala-Río,Víctor Santibáñez,Fernando Reyes 제어·로봇·시스템학회 2013 International Journal of Control, Automation, and Vol.11 No.1
In this paper, an output-feedback adaptive scheme for the global position stabilization of robot manipulators with bounded inputs is proposed. Compared to the previous output-feedback adap-tive approaches developed in a bounded-input context, the proposed free-of-velocity feedback control-ler guarantees the adaptive regulation objective: globally, avoiding discontinuities throughout the scheme, preventing the inputs to reach their natural saturation bounds, and imposing no saturation- avoidance restriction on the control gains. Moreover, the developed scheme is not restricted to the use of a specific saturation function to achieve the required boundedness, but may involve any one within a set of smooth and non-smooth (Lipschitz-continuous) bounded passive functions that include the hy-perbolic tangent and the conventional saturation as particular cases. Experimental results corroborate the efficiency of the proposed scheme.
A Probabilistic Approach for Testing Feedback Controllers with Application to Congestion Control
José M. Maestre,Teresa Alvarez,Teodoro Alamo,Anuar Salim del Río,Amalia Luque 제어·로봇·시스템학회 2012 International Journal of Control, Automation, and Vol.10 No.4
Prompted by an application in congestion control of computer networks, this paper presents a methodology to certify with a certain degree of confidence whether a given controller satisfies a pre-defined set of specifications. The methodology is applied to testing AQM controllers for efficiency in congestion control, by repeating detailed simulations under a variety of network configurations.
Sydonne Swaby,Nieves Ureña,María Teresa Pérez-Prior,Carmen del Río,Alejandro Várez,Jean-Yves Sanchez,Cristina Iojoiu,Cristina Iojoiu,Belén Levenfeld 한국공업화학회 2023 Journal of Industrial and Engineering Chemistry Vol.122 No.-
A series of proton exchange membranes based on sulfonated multiblock copolymers with three polysulfone(PSU) and polyphenylsulfone (PPSU) ratios (50/50, 60/40 and 75/25) are prepared following a synthesisstrategy that aims to achieve a microphase separation. A selective sulfonation of PSU blocks wasobserved in copolymers with a high proportion of PSU. The water uptake is higher in these materials(31% and 57% for SPES 50/50 and SPES 75/25, respectively at 60 C) while the tensile strength was lower(56.0 MPa and 40.6 MPa for SPES 50/50 and SPES 75/25 in the H+ form, respectively). Ionic conductivity ofSPES 75/25 membranes measured both ex situ and in situ at 80 C is 25 and 31 mScm1, respectively. Fuelcell tests reveal that SPES 75/25 shows the highest value for the maximum power density (670 mWcm2at 70 C and 100% of RH) which is higher than that achieved for SPES 50/50 (400 mWcm2). In addition,the high current density obtained for SPES 75/25 (1000 mAcm2 at 0.6 V and 70 C) compared withSPES50/50 (600 mAcm2) and Nafion 112 (450 mAcm2 at 75 C) shows its promising properties as solidelectrolyte in polymeric fuel cells.