A Graphical User Interface for Designing Graph Grammars

Graph grammar has been widely applied in many scientific areas. However, designing graph grammar is very challenging for users without strong computer science background. This paper presents a graphical user interface (GUI) for designing graph grammars following an edge-based context-sensitive graph grammar formalism, EGG. This GUI significantly eases graph grammar design, especially for users unfamiliar with the grammar format

Effect of Working Medium on Single Screw Refrigeration Compressor Performance

The single screw refrigeration compressor (SSRC) is widely used in refrigeration and air conditioning systems due to the advantages of simple structure, balanced forces on the rotor, small vibration, low noise level, high volumetric efficiency and so on. In the SSRC, working medium is an important factor influencing the thermal dynamic performance of the compressor. Restricted by the application environment and the requirements of environmental protection, the types of the working medium used in the SSRC will change gradually in future, this to a certain extent, affect the compressor adaptability for medium and the operation stability and reliability of compressor. Thus the effects of the working medium on the geometric characteristics and dynamic performance of the SSRC must be studied. In this paper, the geometric model of the exhaust port and the fluid flow calculation model of the exhaust process were established for analyzing the influence of the working medium on the exhaust port opening position and the flow resistance loss during exhaust process in the SSRC. A dynamic characteristic analysis model was proposed to calculate the force act on the meshing pairs and the bearings under the working condition as well as the load conditions of the shaft system under the shutdown-starting condition. All analysis results obtained in this paper can be useful for optimum design of the SSRC to improve the operation stability and reliability and the energy efficiency of the compressor with different working medium. The first major section of the manuscript is an abstract. The abstract should describe the contents of the paper, discuss the contribution to the field as well as present the most important results. Authors are responsible for typing accuracy and proofreading the manuscript. If accepted, the manuscript must be submitted for reproduction without being edited or retyped by the staff before printing. The manuscript must look professional and be technically correct in order to be accepted.Â

Hospital Technology Integration in South US States

The paper chronicles exploratory research in the domain of hospital electronic health records (EHR) adoption with a view to establishing a foundation for additional research. After reviewing the literature on technology integration within hospitals and health information exchange, the paper includes a review of the adoption and use of EHR by hospitals in southern US states to determine if anomalies exist by state or by year. The first major finding is that no differences existed between states. Next, it was discovered that there were statistically significant differences in hospital ERH adoption between four consecutive year pairs (2010/11, 2011/12, 2012/13 and 2013/14). This finding was mirrored in small hospital adoption; however, the finding was slightly different in rural hospitals where the difference was only significant in 2011/12 and 2012/13. These findings should be the catalyst for future research to explore the cause of these differences

Analyzing thin film morphology by Resonance Raman spectroscopy

Polymeric organic thin film transistors (OFETs) and all-polymer bulk heterojunction solar cells (all-PCS), which are composed of a polymer donor and a polymer acceptor, have attracted considerable attention in the last years. The interest of these polymeric materials present various advantages versus small molecular counterparts, including strong light absorption, excellent mechanical flexibility and durability, and great potential in printing applications due to their great processability. In OFETs and bulk heterojunction solar cells, the morphology and crystallinity control of the neat polymer or blended donor-acceptor polymer films is essential in order to improve device performance. In this communication, we present a Resonance Raman spectroscopy study directed to disentangle the film morphology of a series of all-acceptor and donor acceptor polymers for OFETs and all-PCS applications.Universidad de Málaga. Campus de Excelencia Internacional Andalucía Tech

Damping multi-model adaptive switching controller design for electronic air suspension system

This paper presents the design and verification of a damping multi-model adaptive switching controller for electronic air suspension (EAS) system. In order to improve the convergence rate of identification algorithm of conventional adaptive controller, multiple local linear full-car vehicle models of EAS system with fixed parameters are established according to the actual damping control process of EAS for different vehicle driving conditions and an adaptive model whose initial value of parameters can be re-assigned is introduced to enhance the system control precision. The model switching control strategy based on minimum error is used to select the best matching model online and the optimum damping force is regulated by adaptive control algorithm, thus constituting the damping multi-model adaptive control for EAS. Simulation results show that the control method proposed in this paper can improve the damping regulating performance of EAS effectively in wide range driving conditions, especially for the case of sudden change in driving conditions

Efficient Deep Reinforcement Learning via Adaptive Policy Transfer

Transfer Learning (TL) has shown great potential to accelerate Reinforcement Learning (RL) by leveraging prior knowledge from past learned policies of relevant tasks. Existing transfer approaches either explicitly computes the similarity between tasks or select appropriate source policies to provide guided explorations for the target task. However, how to directly optimize the target policy by alternatively utilizing knowledge from appropriate source policies without explicitly measuring the similarity is currently missing. In this paper, we propose a novel Policy Transfer Framework (PTF) to accelerate RL by taking advantage of this idea. Our framework learns when and which source policy is the best to reuse for the target policy and when to terminate it by modeling multi-policy transfer as the option learning problem. PTF can be easily combined with existing deep RL approaches. Experimental results show it significantly accelerates the learning process and surpasses state-of-the-art policy transfer methods in terms of learning efficiency and final performance in both discrete and continuous action spaces.Comment: Accepted by IJCAI'202

Understanding charge transport in organic field effect transistors

The organic electronics research field has advanced tremendously in the last decades, having already led to field-effect mobilities able to compete with their inorganic counterparts. However, many fundamental aspects of this field remain still unclear and need to be clarified before its final blossoming, which would probably come with the complete understanding of the charge transport mechanism in organic materials. It is well-known that the performance of organic semiconductors is governed not only by their molecular structures but also by their intermolecular assembly in the solid state. Therefore, analyzing organic materials from both a molecular and supramolecular point of view is highly desirable. For this end, Raman spectroscopy is a rapid, non invasive technique able to gather information on molecular and supramolecular levels, thus being greatly useful in the organic electronics research field. Analyzing buried interfaces, such as the semiconductor-dielectric interface in organic field effect transistors (OFETs) is fundamental, since the largest contribution to charge transport occurs within the first few nanometers of the semiconductor near the dielectric interface. Surface Enhanced Raman Spectroscopy (SERS) appears as an easy and straightforward technique to carry out this task and to provide useful information on molecular orientation at the device active layer. In this communication, some examples will be presented in which several spectroscopic techniques, conventional Raman and SERS, supported by DFT quantum chemical calculations have been used to shed light on the mechanism of charge transport in OFETs.Universidad de Málaga. Campus de Excelencia Internacional Andalucía Tech