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| 1 | Flexible distributed feedback lasers based on nanoimprinted cellulose diacetate with efficient multiple wavelength lasing显示文摘Here we present the assembly of novel transparent all-polymer distributed feedback(DFB)lasers.Flexible and highly transparent cellulose diacetate(CdA)was employed as substrate on which gratings with different periods were engraved by thermal nanoimprinting with high fidelity.Highly luminescent conjugated polymers(CP),poly(9,9-dioctylfluorene)(PFO),poly(9,9-dioctylfluorene-alt-benzothiadiazole)(F8BT),and a blend of F8BT and poly(3-hexylthiophene)-poly(9,9-dioctylfluorene-altbenzothiadiazole)(P3HT:F8BT)were deposited by spin coating onto the nanostructured plastic surfaces,giving rise to perpendicular single-mode lasing emission in the blue,green,and red wavelength ranges,respectively.These lasers show linewidths below 1 nm and low thresholds(≈6μJcm^(−2) for blue and red lasing emission),comparable to other state-of-the-art lasers obtained from similar optical gain materials on rigid substrates.The followed strategy is scalable and versatile,enabling the development of large area nanoimprinted DFB lasers(>1cm^(2))on plastic,which is highly relevant for applications in various markets. | José R.Castro Smirnov Ahmad Sousaraei Manuel R.Osorio Santiago Casado Jaime J.Hernández Longfei Wu Qi Zhang Ruidong Xia Daniel Granados Reinhold Wannemacher Isabel Rodriguez Juan Cabanillas-Gonzalez | 2019 | npj Flexible Electronics2019，3，1： | 2 |
| 2 | Controller Design for Induction and Brushless Motors Using Matlab with Digital Signal Processor (DSP)显示文摘The automation process is a very important pillar for Industry 4.0.One of the first steps is the control of motors to improve production efficiency and generate energy savings.In mass production industries,techniques such as digital signal processing(DSP)systems are implemented to control motors.These systems are efficient but very expensive for certain applications.From this arises the need for a controller capable of handling AC and DC motors that improves efficiency and maintains low energy consumption.This project presents the design of an adaptive control system for brushless AC induction and DC motors,which is functional to any type of plant in the industry.The design was possible by implementing Matlab software and tools such as digital signal processor(DSP)and Simulink.Through an extensive investigation of the state of the art,three models needed to represent the control system have been specified.The first model for the AC motor,the second for the DC motor and the third for the DSP control;this is done in this way so that the probability of failure is lower.Subsequently,these models have been programmed in Simulink,integrating the three main models into one.In this way,the design of a controller for use in AC induction motors,specifically squirrel cage and brushless DC motors,has been achieved.The final model represents a response time of 0.25 seconds,which is optimal for this type of application,where response times of 2e-3 to 3 seconds are expected. | B.R.Claros Poveda R.Castro Castro | 2023 | Journal of Mechanics Engineering and Automation2023，13，4： | 0 |
| 3 | 加州兰德斯7.3级地震远距离触发的地震活动显示文摘1992年6月28日7.3级兰德斯地震在美国西部大部分地区触发了地震活动的异常迅速而广泛的增强.所触发的地震发生在距兰德斯主震1250km(震源尺度的17倍)处,范围局限于具有持久地震活动性的地区,并呈走滑到正断层机制.其中许多还是地热和近代火山活动场所.根据计算的地震弹性模型的静应力交化似乎很小,并不足以导致触发。最有可能的解释是,伴随主震地震波的大的动应交和地壳流体(或许还包括地壳岩浆)之间的非线性相互作用。 | D.P.Hill P.A.Reasenberg A.Michacl W.JArabaz G.Beroza D.Brumbaugh J.N.Drune R.Castro S.Davis D.dePolo W.L.Rllsworth J.Gombers S.Harmsen L.House S.M.Jackon M.J.S.Johnston R.Keller S.Malone L.Mungula S.nava J.C.Pechmann A.Sanford R.W.Simpson R.B.Smith M.Stickney A.Vudal S.Walter V.Wong J.Zollweg 张嘉延 | 1994 | 世界地震译丛1994，25，4： | 0 |
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