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1.
Bernard Brogliato Rogelio Lozano 《International Journal of Adaptive Control and Signal Processing》1992,6(1):35-44
The standard least squares (LS) estimation algorithm is modified in such a way that it becomes passive. Therefore the scope of application of the LS algorithm is extended to those adaptive schemes whose convergence proof is based on passivity. The passive version of LS is presented in both continuous and discrete time. 相似文献
2.
Iván González Sergio Salazar Rogelio Lozano 《Journal of Intelligent and Robotic Systems》2014,73(1-4):137-155
Nowadays, the chattering problem in sliding mode control is one of the most important points to consider in real-time applications. To address this problem, a real-time robust altitude control scheme is proposed for the efficient performance of a Quad-rotor aircraft system using a continuous sliding mode control. The sensing of altitude measurement sensing is performed by a pressure sensor in order to obtain a robust altitude control of the vehicle in hovering mode both indoor and outdoor. The altitude measurement has the advantage of introducing this state information directly in the closed loop control which should be very useful for achieving robust stabilization of the altitude control. Accordingly, we propose a sliding mode control strategy without chattering. The sliding mode control proposed removes the chattering phenomenon by replacing a sign function with a high-slope saturation function. The control algorithm is derived from the Lyapunov stability theorem. Moreover, we have assumed that the actuators are able to respond quickly and accurately and we have not enforced limits on the control signals for a real-time application. Finally, to verify the satisfactory performance of proposed nonlinear control law, several simulations and experimental results of the Chattering-free sliding mode control for the Quad-rotor aircraft in the presence of bounded disturbances are presented. 相似文献
3.
Muñoz-Ramírez David-Octavio García-Salgado Beatriz-Paulina Ponomaryov Volodymyr Reyes-Reyes Rogelio Sadovnychiy Sergiy Cruz-Ramos Clara 《Multimedia Tools and Applications》2021,80(9):13707-13734
Multimedia Tools and Applications - The copyright protection of three-dimensional (3D) content is a matter of interest in artistic and creative works due to the rights of the holder for the... 相似文献
4.
The inverted pendulum has been used as a benchmark for motivating the study of nonlinear control techniques. We propose a simple controller for balancing the inverted pendulum and raise it to its upper equilibrium position while the cart displacement is brought to zero. The control strategy is based on an energy approach of the cart and pendulum system. 相似文献
5.
Alonzo Gonzlez-Gonzlez Oscar Snchez-Snchez R. Luise Krauth-Siegel Maria Laura Bolognesi Rogelio Gmez-Escobedo Benjamín Nogueda-Torres Lenci K. Vzquez-Jimnez Emma Saavedra Rusely Encalada Jos Carlos Espinoza-Hicks Alma D. Paz-Gonzlez Gildardo Rivera 《International journal of molecular sciences》2022,23(21)
American trypanosomiasis is a worldwide health problem that requires attention due to ineffective treatment options. We evaluated n-butyl and isobutyl quinoxaline-7-carboxylate 1,4-di-N-oxide derivatives against trypomastigotes of the Trypanosoma cruzi strains NINOA and INC-5. An in silico analysis of the interactions of 1,4-di-N-oxide on the active site of trypanothione reductase (TR) and an enzyme inhibition study was carried out. The n-butyl series compound identified as T-150 had the best trypanocidal activity against T. cruzi trypomastigotes, with a 13% TR inhibition at 44 μM. The derivative T-147 behaved as a mixed inhibitor with Ki and Ki’ inhibition constants of 11.4 and 60.8 µM, respectively. This finding is comparable to the TR inhibitor mepacrine (Ki = 19 µM). 相似文献
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Suresh K. Gadi Antonio Osorio-Cordero Rogelio Lozano-Leal Ruben A. Garrido 《Journal of Intelligent and Robotic Systems》2017,86(2):215-224
This paper presents a stability analysis of the interaction between a human and a linear moving Force Augmenting Device (FAD). The analysis employs a mathematical model of the human arm, the FAD and their interaction. As a depart from past works, this article presents a stability analysis considering time-delays in the human model. A key ingredient in the analysis is the use of the Rekasius substitution for replacing the time-delay terms. It is proved that the human machine interaction is stable when the human model has no delays. When delays are considered in the human model, the analysis provides an upper bound for the time-delays preserving a stable interaction. Numerical simulations allow to assess the human-FAD interaction. An experiment is performed with a laboratory prototype, where a human operator lifts a load. It is observed that the human machine interaction is stable and the human operator is able to move the load to a desired position by experiencing very little effort. 相似文献
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Rogelio?RodríguezEmail author Miriam?Estevez Susana?Vargas M.?Antonieta?Mondragón 《Materials Research Innovations》2003,7(2):80-84
The synthesis and characterization of a hybrid ceramic-polymer coating with high wearing resistance and designed to cover
wood surfaces, are reported in this work. This hybrid material provides a high wearing resistance (400% higher than a conventional
commercial product typically used to protect these surfaces); additionally it has a high UV resistance and high transparency
and gloss. The wood surfaces were previously treated either with a primer coating or with a special coupling agent, before
the hybrid coating was applied; in both cases, good adhesion with the substrate was obtained.
Electronic Publication 相似文献