清华大学Yang Research Group实验室与英国利物浦大学Andreas Alpers实验室 招收双联学位博士生一名。 非常欢迎直接与清华大学电机系杨尚桦助理教授联系。 连络信箱: [email protected] [Project Title] Digital Terahertz Computational Tomography [Availability] Open to students worldwide. [Supervisors] Prof. Shang-Hua Yang ([email protected]) Department of Electrical Engineering, National Tsing Hua University, Taiwan Prof. Shang-Hua Yang, the director of Yang Research Group at NTHU, has expertise in microwave photonics, terahertz optoelectronics, terahertz biomedical imaging, ultrafast optoelectronics, plasmonic photonics and nanostructures. He has authored over 60 refereed papers in peer-reviewed journals and conference proceedings on these topics. He has received several prestigious awards including the SPIE Scholarship in Optics and photonics, IEEE Antennas and Propagation Society Doctoral Research Award, Joan and Irvin Jacobs TIX Institute Industry Scholar, Lindau Nobel Laureate Meeting Young Scientist Fellow and MOST Young Scholar Fellowship. Website: https://www.ee.nthu.edu.tw/shanghua/ Prof. Andreas Alpers ([email protected]) Department of Mathematical Sciences, University of Liverpool, UK Prof. Andreas Alpers is a Lecturer of Mathematical Sciences at the Universit y of Liverpool. Discrete Inverse Problems, Discrete Optimization, Tomography, Discrete Mathematics, Computational Complexity, Mathematical Imaging, The Pr ouhet-Tarry-Escott Problem. He is the author and co-author of more than 30 p apers in international refereed journals and books, monographs, conference proceeding s. Website: https://www.liverpool.ac.uk/mathematical-sciences/staff/andreas-alp ers/ [Qualifications and Experience] *This position will remain open until a suitable candidate has been found. Applicants will have a first class or upper second class honours degree (or equivalent) in the engineering/science program and laboratory research exper ience. Successful candidates will have strong math and programming skills. A n additional masters level research experience in terahertz technology, comp uter vision or medical imaging research is a benefit, though not required. A ll applicants must satisfy the appropriate University English language requi rements. For EU and international students this is an IELTS score of 6.5 wit h no band score lower than 5.5. When applying please ensure you Quote the supervisor & project title you wis h to apply for and note ‘NTHU-UoL Dual Scholarship’ when asked for details of how plan to finance your studies. Be sure to send your CV, cover letter and the names and addresses of at least two references to [email protected] du.tw. For application enquires please contact Prof. Shang-Hua Yang (shanghu [email protected]) or Prof. Andreas Alpers ([email protected]). [Funding Information] This project is part of a 4 year Dual PhD degree programme between the Natio nal Tsing Hua University (NTHU) in Taiwan and the University of Liverpool in England. As Part of the NTHU-UoL Dual PhD Award students are in the unique position of being able to gain 2 PhD awards at the end of their degree from two internationally recognized world leading Universities. As well as benefi ting from a rich cultural experience, Students can draw on large scale natio nal facilities of both countries and create a worldwide network of contacts across 2 continents. Both the University of Liverpool and NTHU have agreed t o waive the tuition fees for the duration of the project and stipend of TWD 11,000/month will be provided as a contribution to living costs (the equival ent of ￡280 per month when in Liverpool). [Project Description] Hidden object inspection, chemical-fingerprint identification, space explora tion—are some of the many applications for THz radiation that can reshape h ow we live in the coming decades. Bringing these applications to daily use, though, urgently requires low-complexity, high-speed modalities to empower T Hz imaging systems. In the past decades, THz time-domain spectroscopy (THz-T DS) has become one of the most representative techniques to achieve non-inva sive inspection due to its unique capability of extracting geometric and mul tifunctional information of 3D objects from meter-scale down to atomic-scale . However, it typically takes minutes to hours to visualize a single spot's interior details, which prevents the practical use of THz-TDS systems for hi gh-resolution, large field-of-view (FOV) tomographic applications. Reducing data acquisition time with several orders of magnitude become the most chall enging but impactful topic in the THz imaging research field. This PhD proje ct will target to develop a new type of THz computation tomography modality based on digital THz photonics and discrete/geometric tomography. Instead of scanning objects point by point, we introduce digitalized THz beam patterns to probe arbitrary spatial regions for any given projection angle at once. The objects that we will image will have rather specific structures in the s ense that they are either homogeneous, contain only a few grey levels, consi st of (moving) particles, defects or other geometrically well-defined object s. This will still include many cases of practical interest but has the bene fit -which is vital in the THz-CT context- that they typically require data acquisition from very small number of projection angles. While minimizing th e number of patterned frames but keeping tens-kfps-level framerates, the dat a acquisition time can be significantly reduced. Since the cost of structure d light imaging increases data complexity, it is crucial to levitate computa tion loading within hardware settings. Here, we design THz Fourier optics co mponents to synthesize algorithm-based operators for tomographic imaging rec onstruction digitally. While patterned THz beam propagates through a series of digital THz components, each operator acts upon every matrix element in t ime, space, and spectrum at light speed. In this regard, the time expense of computation could be negligible. Depending on FOV and voxel size, digital T Hz CT can offer 3D profiles of optically opaque objects in real-time. ---- Sent from BePTT on my Sony J9110 --

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