We mainly present the design and implement a mobile vehicle monitoring system using android smartphones.Users can observe the their vehicles' information using a mobile screen anytime, anywhere. Our proposed design is composed of small the GPS/GNSS receiver terminal, modern data acquisition modem, cellular data transmission network, and the smartphone application. We comprehensively discuss the key technologies in terms of hardware and software aspects employed in the system including posible indoor positioning wireless technologies.The designed system in the paper is implemented and tested in practical experiments. Experimental results have proved that the proposed monitoring system is correct and feasible for vehicle owners.

No abstract

<p>Heat storage in crystalline basement rocks is a promising technology because it can provide a reliable source of heat and help to increase the efficiency of energy systems, and reduce greenhouse gas emissions. BTES systems work by circulating water in multiple borehole heat exchangers (BHE). However, BTES systems can be expensive to install, as they are sub-surface installations which require the drilling of medium-deep boreholes into often complex, sometimes fractured, heterogeneous lithologies.  Therefore, the geological uncertainties must be integrated from the early planning stage on.</p> <p>This contribution focuses on the insights gained in the SKEWS (Seasonal Crystalline Borehole Thermal Energy Storage) project (research project SKEWS, project administrator Jülich, funding code 03EE4030A) and how these will be developed and rolled out in the Horizon Europe PUSH-IT project into follow-up sites at the European scale. The SKEWS project implements the world’s first demo site for Medium-Deep Borehole thermal energy storage in crystalline rocks, with three 750 m deep boreholes separated from an 8.6 m distance, drilled at campus Lichtwiese from the Technical University of Darmstadt, Germany.</p> <p>From the drilling campaign carried out in the summer and autumn 2022, new insights have been gained into the implementation of BTES in such an urban environment.<em> </em>These insights go from the drilling technologies and verticality to the installation of the BHE. This knowledge and know-how will then be developed during the test phase and with the integration and surface connection of the BHE field with a section of the district heating grid.</p> <p>Borehole heat exchanger installation, with insights on the experience gained on the optimal design, drilling, and completion, will be detailed. The planning and first results of the reservoir test phase and monitoring through optic fibre will be presented, as well as perspectives on targeted digital twin geological static and dynamic modelling of the reservoir and the district heating grid in a co-simulation workflow.</p> <p>Such outputs will allow quantitative estimation of the technical and economic potential of the MD-BTES systems in existing or future district heating grids.</p>

In this work, we have successfully synthesized cubic MASnI3 halide-perovskite on a SnO2 nanowire through two-step process using a chemical vapour deposition (CVD) system. First, SnO2 nanowires with diameter in the range of 15 to 50 nm were fabricated via thermal oxidation process with Au catalyst at 800ºC. A SnO2 nanowire was used as a template for the growth of MASnI3 cubics in the second step. The obtained products were characterized by X-ray diffraction (XRD), field-emission electron scanning microscopy (FE-SEM), and high-resolution transmission electron microscopy (HR-TEM). Finally, the formation mechanism of the MASnI3/SnO2 hybrid was discussed in detail.

In this work, the biaxial SnO/ZnO nanowires in the average length of 5 μm, have been successfully synthesized on a ZnO-nanowire substrate using a chemical vapor deposition (CVD) system through a two-step process. First, ZnO nanowires were grown directly on the glass substrate with a gold catalyst. Then, these nanowires were used as templates for the growth of biaxial SnO/ZnO nanowires without any catalyst. The obtained products were characterized by X-ray diffraction (XRD), field-emission electron scanning microscopy (FE-SEM), and high-resolution transmission electron microscopy (HR-TEM). The Sn-Zn alloy formulated during the process was believed a catalyst for the growth of the biaxial SnO/ZnO nanowires. The biaxial structure was formed due to simultaneous growth of SnO and ZnO nanowire along the direction of SnO [110] and ZnO [002], respectively. A possible growth mechanism of the biaxial SnO/ZnO nanowire was discussed based on the vapor-liquid-solid (VLS) mechanism. The as-synthesized structure could be a good candidate for nano-sensors.