Kenji Mori

Recognition of foggy conditions by in-vehicle camera and millimeter wave radar

Recently driving support techniques using in-vehicle sensors have attracted much attention and have been applied to practical systems. We focus on supporting drivers in poor visibility conditions. Fog is one of the causes that lead to lack of visibility. In this paper, we propose a method of judging fog density using in-vehicle camera images and millimeter-wave (mm-W) radar data. This method determines fog density by evaluating both the visibility of a preceding vehicle and distance to it. Experiments showed that judgments made by the proposed method achieved a recognition rate of 84% when compared to the ground truth obtained by human judgments.

Visibility Estimation in Foggy Conditions by In-Vehicle Camera and Radar

We propose a method of judging fog density by using in-vehicle camera images and millimeter-wave (mm-W) radar data. This method determines fog density by evaluating both the visibility of a preceding vehicle and the distance to it. Experiments revealed that judgments made by the proposed method achieved an 85% precision rate compared to that mode by human subjects

Elucidation of π‐Conjugation Modes in Diarene‐Fused 1,2‐Dihydro‐1,2‐diborin Dianions

A series of diarene-fused 1,2-dihydro-1,2-diborins were prepared as a new B-B-bond-embedded polycyclic π-electron system. The reduction of these compounds with metals produced their corresponding dianions, the π-conjugation modes of which varied from 6π-conjugation within the central 1,2-diborin skeleton to 14π peripheral conjugation over the tricyclic skeleton, depending on the nature of the reduced biaryl framework. Moreover, the countercation to the dianions had a significant effect on the absorption spectra, with a dramatic color change from yellow to deep blue, depending on the distance between the tricyclic dianion skeleton and the countercation.

Structure Sensitive and Insensitive Reactions on Supported Vanadium Oxide Catalysts

The number of surface V=O bonds and the structure of V 2 O 5 on V 2 O 5 /TiO 2 and V 2 O 5 /Al 2 O 3 , catalysts with various contents of V 2 O 5 have been determined by using the rectangular pulse technique coupled with infrared measurements of the adsorption of NH 3 on the catalysts. Turnover frequencies of the reaction of NO and NH 3 in the presence of O 2 and the oxidation of benzene have been obtained on the basis of the measured number of surface V=O bonds. It has been found that the former reaction is a structure insensitive reaction whereas the latter one is a structure sensitive reaction. The promotive effects of TiO 2 support on the reactions on V 2 O 5 catalyst have also been revealed in terms of the turnover frequency.

Effect Of Support And Prfparation On Structure Of Vanadium Oxide Catalysts

Supported vanadium oxides were prepared by both the conventional impregnation and vapour-phase-supporting methods; TiO 2 (anatase), TiO 2 (rutile), TiO 2 (mixture of anatase with rutile), Al 2 O 3 , ZrO 2 , SiO 2 , and MgO were used as supports. The structure of the catalyst was characterized by using the rectangular pulse technique coupled with various physico-chemical measurements. It was found that the structure of the vapour-phase-supported V 2 O 5 /Al 2 O 3 , catalyst does not change significantly from that of the V 2 O 5 /Al 2 O 3 prepared by the conventional impregnation method. The (010) face of V 2 O 5 was found to grow epitaxially on the TiO 2 support, irrespective of the modification of TiO 2 . It was also found that the structures of V 2 O 5 /TiO 2 , V 2 O 5 /Al 2 O 3 , V 2 O 5 /ZrO 2 , V 2 O 5 /SiO 2 , and V 2 O 5 /MgO differ greatly from one another. From these results, it was concluded that the structure of vanadium oxide on support is mainly determined by the kind of support, while neither the method of preparation nor the modification of the support affects the structure significantly.