2019
2019
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Record 73 of
Title:Does being multi-headed make you better at solving problems? A survey of Physarum-based models and computations
Author(s):Gao, Chao(1); Liu, Chen(2); Schenz, Daniel(3); Li, Xuelong(4); Zhang, Zili(1); Jusup, M.(5,6); Wang, Zhen(7); Beekman, Madeleine(8); Nakagaki, Toshiyuki(5,9)Source: Physics of Life Reviews Volume: 29 Issue: DOI: 10.1016/j.plrev.2018.05.002 Published: July 2019Abstract:Physarum polycephalum, a single-celled, multinucleate slime mould, is a seemingly simple organism, yet it exhibits quasi-intelligent behaviour during extension, foraging, and as it adapts to dynamic environments. For these reasons, Physarum is an attractive target for modelling with the underlying goal to uncover the physiological mechanisms behind the exhibited quasi-intelligence and/or to devise novel algorithms for solving complex computational problems. The recent increase in modelling studies on Physarum has prompted us to review the latest developments in this field in the context of modelling and computing alike. Specifically, we cover models based on (i) morphology, (ii) taxis, and (iii) positive feedback dynamics found in top-down and bottom-up modelling techniques. We also survey the application of each of these core features of Physarum to solving difficult computational problems with real-world applications. Finally, we highlight some open problems in the field and present directions for future research. ? 2018Accession Number: 20182205257476 -
Record 74 of
Title:Vibration analysis for lightweight and laminated electronic equipment
Author(s):Shi, Jinfeng(1); Wang, Wei(1); Xia, Siyu(1); Xin, Wei(1)Source: Zhendong yu Chongji/Journal of Vibration and Shock Volume: 38 Issue: 19 DOI: 10.13465/j.cnki.jvs.2019.19.024 Published: October 15, 2019Abstract:Aerospace electronic products have to experience harsh assessment of mechanical environment in launch period. Here, in order to accurately predict dynamic response results of printed circuit boards (PCBs), parameters affecting prediction results were analyzed. Firstly, the equivalence methods for PCB modeling were analyzed and explored to clarify the global mean modeling one. Secondly, according to the dynamic response equation of PCB, using a large amount of test data, statistical analyses were performed for two factors affecting the analysis results of the global mean method to determine the reasonable range of each factor. Finally, the global mean modeling method was used to do dynamic analysis for a video electronic box, and compare the analysis results with test data. Results showed that the error between analysis results and test data is within 18% to meet requirements of engineering application, the proposed method can rapidly realize the prediction of PCB dynamic responses; the proposed method provides a reference for the further design work of corresponding products. ? 2019, Editorial Office of Journal of Vibration and Shock. All right reserved.Accession Number: 20194807761271 -
Record 75 of
Title:Research on methods of enlarging field of view of the synthetic aperture lidar
Author(s):Zhao, Yiyi(1); Xue, Bin(1); Ma, Xiaolong(1); He, Yinghong(1); Yan, Xingtao(1); Lv, Juan(1); Xiang, Meng(1,2)Source: Proceedings of SPIE - The International Society for Optical Engineering Volume: 10837 Issue: DOI: 10.1117/12.2504949 Published: 2019Abstract:Synthetic aperture lidar is a new ultra-high resolution optical imaging instrument, but its reception field is very narrow which is subject to the "antenna theory". In this paper, the antenna efficiency theory is used to explain the antenna theory and the method of enlarging the field of view of the synthetic aperture laser radar. Then the increase range of the field angle of the three methods is deduced by heterodyne efficiency simulation. The simulation results show that the focal plane heterodyne detection optical path of the wide-beam local oscillator beam focal plane has the ability to improve the heterodyne efficiency of the edge field of view by reducing the heterodyne efficiency of the central field of view. The focal plane heterodyne detection optical path of the array detector requires the detector whose pixel size less than 3 times Airy spot radius covers the whole field of view, which can increase the maximum 1.83N times compared to the antenna theory. The effective field of the pupil plane heterodyne detection optical path of the array detector has nothing to do with the magnification of the telescope, the pupil diameter, the size of the detector, etc., which can be increased by N times as compared with the antenna theory. ? 2019 SPIE.Accession Number: 20190506432453 -
Record 76 of
Title:Super-resolution reconstruction method for single space object image based on optimized convolution neural network
Author(s):Feng, Xubin(1,2); Su, Xiuqin(1); Lian, Xuezheng(1); Xie, Meilin(1); Liu, Peng(1); Jing, Feng(1)Source: 2019 IEEE International Conference on Unmanned Systems and Artificial Intelligence, ICUSAI 2019 Volume: Issue: DOI: 10.1109/ICUSAI47366.2019.9124786 Published: November 2019Abstract:To date, a large number of platforms have been launched into outer space. More and more attention has been paid to space object images. However, it is difficult to obtain high-quality spatial images. One of the most important reasons is that the sensor technology is not good enough. Inspired by the typical super-resolution reconstruction method based on deep CNN, a super-resolution reconstruction method of single space target image based on deep CNN is proposed. This method uses Nesterov acceleration gradient method to train the network. The experimental results show that the method is feasible in the reconstruction of high-resolution spatial target image. ? 2019 IEEE.Accession Number: 20202908946933 -
Record 77 of
Title:High-dimensional one-way quantum processing enabled by optical d-level cluster states
Author(s):Kues, Michael(1,2); Reimer, Christian(1,3); Sciara, Stefania(1,4); Roztocki, Piotr(1); Islam, Mehedi(1); Cortés, Luis Romero(1); Zhang, Yanbing(1); Fischer, Bennet(1); Loranger, Sébastien(5); Kashyap, Raman(5,6); Cino, Alfonso(4); Chu, Sai T.(7); Little, Brent E.(8); Moss, David J.(9); Caspani, Lucia(10); Munro, William J.(11,12); Aza?a, José(1); Morandotti, Roberto(1,13,14)Source: Optics InfoBase Conference Papers Volume: Part F165-QIM 2019 Issue: DOI: 10.1364/QIM.2019.S2C.3 Published: 2019Abstract:By introducing and modifying two-photon hyper-entangled states in the time-frequency domain using an on-chip micro-cavity, we succeed in generating high-dimensional cluster states, demonstrate d-level measurement-based quantum processing and show the state's higher noise tolerance. ? OSA 2019 ? 2019 The Author(s)Accession Number: 20202308780404 -
Record 78 of
Title:High-Dimensional One-Way Quantum Computation Operations with On-Chip Optical D-Level Cluster States
Author(s):Relmer, Christian(1,2); Kues, Michael(1,3); Sciara, Stefania(1,4); Roztocki, Piotr(1); Islam, Mehedi(1); Cortes, Luis Romero(1); Zhang, Yanbing(1); Fischer, Bennet(1); Loranger, Sebastien(5); Kashyap, Raman(5,6); Cino, Alfonso(4); Chu, Sai T.(7); Little, Brent E.(8); Moss, David J.(9); Caspani, Lucia(10); Munro, William J.(11,12); Azana, Jose(1); Morandotti, Roberto(1,13,14)Source: 2019 Conference on Lasers and Electro-Optics, CLEO 2019 - Proceedings Volume: Issue: DOI: 10.23919/CLEO.2019.8750197 Published: May 2019Abstract:We implement on-chip generation of high-dimensional hyper-entangled states in the time-and frequency-domain, and transform them into d-level cluster states using a deterministic controlled phase gate. We then demonstrate measurement-based quantum computing operations and show the state's high tolerance towards noise. ? 2019 The Author(s) 2019 OSA.Accession Number: 20192907215909 -
Record 79 of
Title:High-dimensional one-way quantum computation operations with on-chip optical d-level cluster states
Author(s):Reimer, Christian(1,2); Kues, Michael(1,3); Sciara, Stefania(1,4); Roztocki, Piotr(1); Islam, Mehedi(1); Cortés, Luis Romero(1); Zhang, Yanbing(1); Fischer, Bennet(1); Loranger, Sébastien(5); Kashyap, Raman(5,6); Cino, Alfonso(4); Chu, Sai T.(7); Little, Brent E.(8); Moss, David J.(9); Caspani, Lucia(10); Munro, William J.(11,12); Aza?a, José(1); Morandotti, Roberto(1,13,14)Source: Optics InfoBase Conference Papers Volume: Part F128-CLEO_QELS 2019 Issue: DOI: 10.1364/CLEO-QELS.2019.FTh1A.4 Published: 2019Abstract:We implement on-chip generation of high-dimensional hyper-entangled states in the time- and frequency-domain, and transform them into d-level cluster states using a deterministic controlled phase gate. We then demonstrate measurement-based quantum computing operations and show the state's high tolerance towards noise. ? 2019 The Author(s).Accession Number: 20192707140451 -
Record 80 of
Title:Performance comparison between two kinds of variable curvature mirrors: Mathematical analysis, prototype design, experimental demonstration, and application potentials in realizing non-moving element optical zooming
Author(s):Zhao, Hui(1); Xie, Xiaopeng(1,2); Xu, Liang(1); Zou, Gangyi(1); Li, Chuang(1); Fan, Xuewu(1)Source: Proceedings of SPIE - The International Society for Optical Engineering Volume: 10837 Issue: DOI: 10.1117/12.2504861 Published: 2019Abstract:Variable curvature mirror (VCM) is a long-history technique used to correct the defocus and spherical aberrations caused by thermal lens effect in solid-state laser. In recent years, the probability of VCM in realizing non-moving element optical zoom imaging has been paid much attention and how to generate a large enough saggitus variation while still maintaining good enough surface figure accuracy is the research hot topic. In this manuscript, two kinds of VCM has been studied and the advantages of pressurization actuation based VCM having variable mirror thickness has been confirmed. Compared with the traditional annular force actuation based VCM with constant mirror thickness, the pressurization actuation based one having variable mirror thickness is capable of providing a saggitus variation of larger than 35um and still maintaining its surface figure accuracy superior to 1/10λ(λ=632.8nm). Besides that, it is found that spherical aberration plays a main role in leading to the degradation of surface figure accuracy and the surface figure accuracy at extreme curvature could be improved to about 1/40λ(λ=632.8nm) by only removing spherical aberration. Therefore, when applying pressurization actuation based VCM to realize non-moving element optical zooming, the wavefront sensing and subsequent digital correction to eliminate the spherical aberration will become a necessary step. ? 2019 SPIE.Accession Number: 20190506432478 -
Record 81 of
Title:Optical d-level frequency-time-based cluster states
Author(s):Kues, Michael(1,2); Reimer, Christian(1,3); Sciara, Stefania(1,4); Roztocki, Piotr(1); Islam, Mehedi(1); Cortés, Luis Romero(1); Zhang, Yanbing(1); Fischer, Bennet(1); Loranger, Sébastien(5); Kashyap, Raman(5,6); Cino, Alfonso(4); Chu, Sai T.(7); Little, Brent E.(8); Moss, David J.(9); Caspani, Lucia(10); Munro, William J.(11,12); Aza?a, José(1); Morandotti, Roberto(1,13,14)Source: Optics InfoBase Conference Papers Volume: Part F143-EQEC 2019 Issue: DOI: null Published: 2019Abstract:Cluster states, a specific class of multi-partite entangled states, are of particular importance for quantum science, as such systems are equivalent to the realization of one-way (or measurement-based) quantum computers [1]. In this scheme, algorithms are implemented through high-fidelity measurements on the parties of the state [2]. While two-level (i.e. qubit) cluster states have been realized so far, increasing the number of particles to boost the computational resource comes at the price of significantly reduced coherence time and detection rates, as well as increased sensitivity to noise, restricting the realization of discrete cluster states to a record of eight qubits. In contrast, the demonstration of d-level (i.e. qudit) cluster states has the potential to i) increase quantum resources without modifying the number of particles; ii) enable the implementation of highly efficient computational protocols; iii) reduce the noise sensitivity of the states. Up till now, the realization of discrete d-level cluster states has not been shown in any quantum platform. We here demonstrate the realization of d-level cluster states, perform d-level one-way quantum processing operations on the states, and show that higher-dimensional forms of cluster states are more noise tolerant than lower dimensional realizations. ? 2019 IEEEAccession Number: 20202008663044 -
Record 82 of
Title:Laser cavity-soliton micro-combs
Author(s):Bao, Hualong(1); Cooper, Andrew(1); Rowley, Maxwell(1); Di Lauro, Luigi(1); Gongora, Juan Sebastian Totero(1); Chu, Sai T.(2); Little, Brent E.(3); Oppo, Gian-Luca(4); Morandotti, Roberto(5,6,7); Moss, David J.(8); Wetzel, Benjamin(1); Peccianti, Marco(1); Pasquazi, Alessia(1)Source: arXiv Volume: Issue: DOI: null Published: February 26, 2019Abstract:The field of micro-cavity based frequency combs, or 'micro-combs'[1, 2], has recently witnessed many fundamental breakthroughs[3-19] enabled by the discovery of temporal cavity-solitons, self-localised waves sustained by a background of radiation usually containing 95% of the total power[20]. Simple methods for their efficient generation and control are currently researched to finally establish micro-combs as out-of-the-lab widespread tools[21]. Here we demonstrate micro-comb laser cavity-solitons, an intrinsically highly-efficient, background free class of solitary waves. Laser cavity-solitons have underpinned key breakthroughs in semiconductor lasers[22, 23] and photonic memories[24-26]. By merging their properties with the physics of both micro-resonators[1, 2] and multi-mode systems[27], we provide a new paradigm for the generation and control of self-localised pulses in micro-cavities. We demonstrate 50 nm wide soliton combs induced with average powers one order of magnitude lower than those typically required by state-of-the-art approaches[26]. Furthermore, we can tune the repetition-rate to well over a megahertz with no-active feedback. Copyright ? 2019, The Authors. All rights reserved.Accession Number: 20200488212 -
Record 83 of
Title:Study on aerodynamic optimization design method analysis and control algorithm of the pod
Author(s):Huang, Wei(1); Xie, Meilin(1,2); Yang, Xiaoxu(1); Lian, Xuezheng(1); Zhang, Yihang(3)Source: Proceedings of 2019 IEEE 8th Joint International Information Technology and Artificial Intelligence Conference, ITAIC 2019 Volume: Issue: DOI: 10.1109/ITAIC.2019.8785557 Published: May 2019Abstract:Based on the use and function of the airborne pod, the stability and tracking accuracy indexs are the guarantee of obtaining high-quality images under the flight environment, and also a premise of successfully completing various tasks. Aiming at the aircraft subsonic pod in high-speed flight environment, in order to achieve full spectrum segment detection, the pod adopts the open form to complete pointing and tracking functions through the two-dimensional command motion of the pendulum mirror in the head of the pod. In this paper, the coupling relation, which is aircraft disturbance conversion to the pendulum mirror, is analyzed firstly. Then according to the difficulties about the control of the pendulum mirror in high-speed flight caused by the wind resistance, Reynolds average method and large eddy simulation method are used to calculate the fluid simulation, and the traditional response surface method and the concomitant method based on the control theory are adopted to optimize the shape design of the aerodynamic cover and the open cabin. On the basis of optimization, an acceleration ring is introduced into the control loop to improve the response speed and cope with the adverse torque disturbance environment caused by the window opening. Finally, the control loop is simulated in the Simulink environment. The results show that the stability accuracy of system is 0.1366mrad ( RMS), which can be applied to existing mounted pods. ? 2019 IEEE.Accession Number: 20193507360364 -
Record 84 of
Title:High dynamic range imaging algorithm based on JND and detail enhancement
Author(s):Liu, Ying(1); Wang, Fengwei(1); Liu, Weihua(1); Ai, Da(1); Yang, Fanchao(2)Source: ACM International Conference Proceeding Series Volume: Issue: DOI: 10.1145/3364908.3365298 Published: September 20, 2019Abstract:High dynamic range imaging is an emerging technology for generating high quality images. The most common method is to acquire high dynamic range images in a multi-exposure fusion manner. The biggest disadvantage of such algorithms is the "artifact" phenomenon caused by the target motion, or the time cost of avoiding "artifacts" for registration. Therefore, Therefore, a high dynamic range imaging algorithm based on the just noticeable difference (JND) and detail enhancement is proposed, which belongs to the generation of high dynamic images from a single image. According to the JND edge of the improved human visual characteristics and local variance matrix, combined with the fuzzy system to obtain the weight matrix describing the quality of different exposure images, so that different exposure images are fused into HDR images. The experimental results show that the algorithm can effectively improve the contrast and clarity of the image, and the generated image is more in line with the subjective visual effect of the human eye. ? 2019 Association for Computing Machinery.Accession Number: 20200107970215