A maximum-likelihood strategy for directing attention during visualsearch

A precise analysis of an entire image is computationally wasteful if one is interested in finding a target object located in a subregion of the image. A useful “attention strategy” can reduce the overall computation by carrying out fast but approximate image measurements and using their results to suggest a promising subregion. The paper proposes a maximum-likelihood attention mechanism that does this. The attention mechanism recognizes that objects are made of parts and that parts have different features. It works by proposing object part and image feature pairings which have the highest likelihood of coming from the target. The exact calculation of the likelihood as well as approximations are provided. The attention mechanism is adaptive, that is, its behavior adapts to the statistics of the image features. Experimental results suggest that, on average, the attention mechanism evaluates less than 2 percent of all part-feature pairs before selecting the actual object, showing a significant reduction in the complexity of visual search     

An Identification Method of Magnetizing Inrush Current Phenomena by Voltage Waveform

In this paper, the authors propose a new method for identification of magnetizing inrush current phenomena. In general, the identification is performed using the current waveform. However, saturation of current transformers makes it impossible to obtain such a waveform. Therefore, the authors introduce an identification method using the voltage waveform, in which the transformer saturation voltage does not occur. By applying Aitken's Δ² process, it is shown that the new identification method gives accurate saturation start and end times.     

Electronic Structure and Thermoelectric Properties of Al-Mn-Fe-Si Alloys

In order to develop practical thermoelectric materials consisting solely of environmentally friendly elements, we investigated the thermoelectric properties of the Al₁₀Mn₃-type (P6₃/mmc, hp26) Al_77−x Mn₂₃Si _x alloys and the Al₁₀₂Mn₂₄Si₁₂-type (Pm-3, cP138) Al_82−x Mn_5.5Fe_12.5Si _x alloys, both of which possess a pseudogap at the Fermi level. The formation range in which the single phase is obtained was determined for these two phases. The electrical resistivity, Seebeck coefficient, and thermal conductivity of the samples involving no secondary phase were measured over the temperature range of 2 K to 300 K. It is found that the thermoelectric properties of these phases are qualitatively accounted for in terms of the pseudogap at the Fermi level in the electronic density of states and the disordering in local atomic arrangements.     

Behavior analysis of emergent rule discovery for cooperative automated driving using deep reinforcement learning

Artificial Life and Robotics - With the improvements in AI technology and sensor performance, research on automated driving has become increasingly popular. However, most studies are based on human...     

生物陶瓷材料的疲劳寿命预测

采用断裂力学中的四点弯曲试验法,研究并预测了氧化铝和氧化锆陶瓷材料在大气和水环境中的循环疲劳破坏特性.结果表明,在相同的应力条件下,氧化铝和氧化锆陶瓷材料,尤其是氧化锆陶瓷,在水环境中的疲劳寿命比大气中的低.通过将预测结果与实验结果比较和对人造股关节的应用,验证了这种疲劳寿命预测方法的有效性和适用性.     

A mobile satellite news gathering system using a flat antenna

We propose a mobile SNG (satellite news gathering) RF terminal that transmits TV programs from a ship or a vehicle to a broadcasting center in real time via a communications satellite. The terminal consists of a transmitter using beam steering flat antenna with 16 subarrays and of a turntable and pitch-roll stabilizer for mechanical tracking. The antenna beam is steered according to a received beacon signal, and rapid tracking with an accuracy of 0.05° cart be achieved even if slant angles in the pitch and roll of the ship in which the terminal is set, are ±10° and ±15°. We demonstrated the good performance of the terminal by transmitting a TV program from a ship in Tokyo Bay     

Parallel fuzzy inference based on α-level sets and generalized means

In this paper, a parallel fuzzy-inference method is proposed in which inference consequences are unified on the basis of α-level sets and generalized means. It has the following advantages over conventional methods: (1) it can control the degree to which the fuzziness and specificity of given facts are reflected to those of unified inference consequences, (2) it can deduce unified inference consequences in the form of normal and convex fuzzy sets which can thus be treated as fuzzy numbers, and (3) it effectively matches systems that include fuzzy-set operations based on the extension principle. This paper first reviews the generalized mean and describes the computational steps of the proposed inference method. Then, the properties of this method are investigated, and the control mechanism of the fuzziness and specificity in unified inference consequences, reflecting those in given facts, are presented. The efficient inference computations are also provided, taking advantage of the α-level-set-based scheme of the proposed inference method. Next, a learning algorithm is derived for the proposed inference method based on the error back-propagation. By feeding fuzzy exemplar patterns, it can automatically adjust the above-mentioned degree of fuzziness and specificity as well as the fuzzy sets in conditional propositions. The simulation studies show the feasibility of the proposed inference method.     

Stages of Design in Technology for Global Development

Information and communication technology projects designed to cost-effectively impact the world's poorest communities require more than technical solutions. A Microsoft research group shares its experiences and lessons learned implementing various ICT4D initiatives in India.     

Functionals in the variational method applied to equivalentimpedance matrix of metallic posts unsymmetrically positioned in arectangular waveguide

Functionals are proposed, which allow the cross-sectional shape of the metallic post to be arbitrary and the post to be placed at an arbitrary position in a rectangular waveguide. The functionals are also applicable to a group of metallic posts placed unsymmetrically on the z=constant plane