著者

尾崎 大晟 中川 智皓 内藤 昭一 井之上 直也 山口 健史 新谷 篤彦

出版者

一般社団法人 人工知能学会

雑誌

人工知能学会全国大会論文集 第37回 (2023) (ISSN:27587347)

巻号頁・発行日

pp.4Xin111, 2023 (Released:2023-07-10)

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教育現場をはじめ,批判的思考力の育成が求められている.議論における適切な反論例を被教育者に示すことは重要である.しかし,教育者が多様な反論例を考えたり,評価したりすることは負担が大きい.そこで本研究では,批判的思考力育成に有効かという観点から,昨今注目を浴びている大規模言語モデルであるGPT-3と,オンラインディベートフォーラムの議論を用いて,自動生成される反論文の品質評価,及びGPT-3を活用する上での生成文の高品質化可能性の検証考察をすることを目的とする.収集した議論例からGPT-3へのプロンプトを作成し,トピック毎に生成文をまとめ,収集した反論と生成した反論の同項目でのスコアリングによる人手での評価と,BERTScoreによる文章一致率評価をする.結果として「反論文単体での論理の正しさ」と「立論に対しての反論文になっているか」の項目において高い数値を得た.また生成した反論は収集した反論とBERTScore上高い類似度であることを示した.各評価項目毎の入力文と生成文の比較,並びに入力方式毎の生成の相違点,今後の課題について報告する.

著者

尾崎 大晟 中川 智皓 内藤 昭一 井之上 直也 山口 健史 新谷 篤彦

雑誌

2023年度 人工知能学会全国大会(第37回)

巻号頁・発行日

2023-04-06

著者

中川 智皓 竹原 昭一郎 須田 義大

出版者

一般社団法人 日本機械学会

雑誌

日本機械学会論文集 C編 (ISSN:03875024)

巻号頁・発行日

vol.75, no.749, pp.74-80, 2009-01-25 (Released:2017-06-09)

参考文献数

12

被引用文献数

4 2

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In this research, the dynamic characteristics of a small wheel bicycle are investigated. The bicycle model is formulated by using multibody dynamics. Then, the stability of bicycles is analyzed by parametric study using the bicycle model. The effects of the parameters of tire diameter and head angle are examined by focusing on a small wheel bicycle. The straight-ahead stability and upstanding stability are evaluated at each parameter. The results show the tendency of stability at each parameter and the influential parameter to the small wheel bicycle is found. The driving experiment using the small wheel bicycle is performed. In the experiment, the stability of the small wheel bicycles with variable head angle is evaluated by the subjects. It is confirmed that varying head angle increases the stability of the small wheel bicycle. The results are corresponding with the simulation results and it is shown that the simulation captures the tendency of the stability and expresses the characteristics of the small wheel bicycle.

著者

山内 克哉 中川 智皓 新谷 篤彦

出版者

一般社団法人 日本機械学会

雑誌

日本機械学会論文集 (ISSN:21879761)

巻号頁・発行日

vol.87, no.893, pp.20-00329, 2021 (Released:2021-01-25)

参考文献数

24

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The car is a main means of transportation all over the world. However, many people drive a car when they travel a short distance alone, that is inefficient in cost and space. Then, personal mobility vehicle (PMV), which is one or two-seater and has high environmental performance, is recently gathering attention. We focus on the three-wheeled vehicle with leaning mechanism called Narrow Tilting Vehicle (NTV) or narrow tilting three-wheeled (NTTW). Leaning mechanism, which gives tires degree of freedom, has an effect of stable cornering in the case of short tread width vehicle. To compere the motion of each leaning mechanism, we model the two types of NTV. One has two front frame which are linked to vehicle body by the arm and rotating respectively around the joint. The other one has a front frame that has two tires connected by the link. We derived equation of motion by referring to Sharp’s 4 DOF two-wheeled vehicle model, and carried out the three kinds of numerical analysis, eigenvalue analysis, modal analysis and running simulation. Through eigenvalue and modal analysis, we find out that NTVs have the same modes as Sharp’s 4 DOF model does, and they have the characteristic mode which vibrates steering and leaning mechanism. By running simulation, NTVs required larger steering torque than two-wheeled vehicle when the vehicle turn at the same angle.

著者

中田 耕太郎 新谷 篤彦 伊藤 智博 中川 智皓

出版者

一般社団法人 日本機械学会

雑誌

関西支部講演会講演論文集

巻号頁・発行日

vol.2019, 2019

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<p>This paper deals with response behavior and rollover resistance of heavy duty truck in cornering. We focus on the connection type vehicle that consists of one tractor and one trailer. The vehicle is expressed by 7 nonlinear equations of motion and 2 constraint conditions of connecting point. The equations include the nonlinear property of the tire lateral force. We use the rate of decrease of wheel load as the index for judging rollover. We perform parameter study about the eccentric distance of center of gravity, the running speed and so on, and investigate the degree of the risk of rollover.</p>

著者

中川 智皓 森田 悠介 新谷 篤彦 伊藤 智博

出版者

一般社団法人 日本機械学会

雑誌

日本機械学会論文集 (ISSN:21879761)

巻号頁・発行日

vol.82, no.838, pp.16-00052, 2016 (Released:2016-06-25)

参考文献数

11

被引用文献数

1

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In recent years, personal mobility vehicles (PMVs) have attracted huge attentions and widely developed. Compact PMVs can move through narrow spaces and they are expected to be used in pedestrian spaces. In this study, we aim to develop a four-wheel stand-up-type personal mobility vehicle for people who cannot walk far distantly because of the pain of foot or waist although they are able to walk for a short distance. The coupled model of human and vehicle is constructed by using multibody dynamics. In the model, the vehicle is expressed by one rigid body. The wheels, body, and handle are considered as a rigid body together. A human is expressed by 8 rigid bodies (foot, lower leg, femoral, body, head, upper arm, lower arm, and hand). The vehicle of the coupled model is accelerated in the numerical simulations. The behaviors of the center of gravity of a human with and without handle constraint are analyzed. As the result of the parametric study, it is found that the center of gravity movement is smaller when the value of the maximum acceleration and the acceleration time are small. It is also found that as the angle of the upper arm becomes large, the movement of the center of gravity is decreased.

著者

谷口 文彦 中川 智皓 新谷 篤彦 伊藤 智博

出版者

一般社団法人 日本機械学会

雑誌

日本機械学会論文集 (ISSN:21879761)

巻号頁・発行日

vol.84, no.861, pp.17-00534-17-00534, 2018 (Released:2018-05-25)

参考文献数

11

被引用文献数

1

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Inverted pendulum vehicles controlled by movement of driver's center of gravity (COG), such as Winglet or Segway are the examples of Personal Mobility Vehicles (PMV). PMV is sometimes expected to be used in pedestrian spaces. When a driver brakes an inverted pendulum vehicle suddenly, the driver has to move his/her COG backward largely and has the risk to lose his/her balance due to the characteristics of vehicle control. Therefore, we aim to achieve a vehicle control system that is friendly to drivers in emergency. In the previous study, the coupling model of a vehicle and a human had been built on Multibody Dynamics and the technique to brake an inverted pendulum vehicle automatically had been proposed using that model. In this study, we carried out two experiments to decide the timing of the automatic braking system defined as Time To Collision (TTC). We carried out two experiments about stopping distance when a driver brakes an inverted pendulum vehicle suddenly and when the automatic braking system is operated, and we compared those results. Then, it was shown that stopping distance operated by the automatic braking system is shorter than by human driver's sudden braking operations. In addition, we derived TTC1 ( 0.7 s ) of inverted pendulum vehicles from these experiments about stopping distance by human drivers' sudden braking. Then, we derived reaction time ( 0.4 s ). Finally, we proposed a safety system using TTC1 and the reaction time. When TTC reaches 1.1[s], the alarm makes a human brake an inverted pendulum vehicle suddenly. Then if a human doesn't brake an inverted pendulum vehicle suddenly and TTC reaches 0.7[s], the automatic braking is operated.

著者

中川 智皓 竹原 昭一郎 須田 義大

出版者

一般社団法人 日本機械学会

雑誌

日本機械学会論文集 C編 (ISSN:03875024)

巻号頁・発行日

vol.75, no.749, pp.74-80, 2009

参考文献数

12

被引用文献数

2 2

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In this research, the dynamic characteristics of a small wheel bicycle are investigated. The bicycle model is formulated by using multibody dynamics. Then, the stability of bicycles is analyzed by parametric study using the bicycle model. The effects of the parameters of tire diameter and head angle are examined by focusing on a small wheel bicycle. The straight-ahead stability and upstanding stability are evaluated at each parameter. The results show the tendency of stability at each parameter and the influential parameter to the small wheel bicycle is found. The driving experiment using the small wheel bicycle is performed. In the experiment, the stability of the small wheel bicycles with variable head angle is evaluated by the subjects. It is confirmed that varying head angle increases the stability of the small wheel bicycle. The results are corresponding with the simulation results and it is shown that the simulation captures the tendency of the stability and expresses the characteristics of the small wheel bicycle.