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On Utilization of K-Means for Determination of <i>q</i>-Parameter for Tsallis-Entropy-Maximized-FCM
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作者 makoto yasuda 《Journal of Software Engineering and Applications》 2017年第7期605-624,共20页
In this paper, we consider a fuzzy c-means (FCM) clustering algorithm combined with the deterministic annealing method and the Tsallis entropy maximization. The Tsallis entropy is a q-parameter extension of the Shanno... In this paper, we consider a fuzzy c-means (FCM) clustering algorithm combined with the deterministic annealing method and the Tsallis entropy maximization. The Tsallis entropy is a q-parameter extension of the Shannon entropy. By maximizing the Tsallis entropy within the framework of FCM, membership functions similar to statistical mechanical distribution functions can be derived. One of the major considerations when using this method is how to determine appropriate q values and the highest annealing temperature, Thigh?, for a given data set. Accordingly, in this paper, a method for determining these values simultaneously without introducing any additional parameters is presented. In our approach, the membership function is approximated by a series of expansion methods and the K-means clustering algorithm is utilized as a preprocessing step to estimate a radius of each data distribution. The results of experiments indicate that the proposed method is effective and both q and Thigh can be determined automatically and algebraically from a given data set. 展开更多
关键词 Fuzzy C-MEANS K-MEANS TSALLIS ENTROPY ENTROPY Maximization ENTROPY Regularization Deterministic Annealing
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日产公司的1.6升双凸轮轴16气门新型发动机
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作者 makoto yasuda 曹耀芳 《内燃机与动力装置》 1994年第2期46-65,共20页
日产公司研制了一种用于1991年新型Sentra汽车的GA16DE发动机。开发此发动机的主要目标是使发动机在中低速时有足够大的扭距和平稳的加速响应。当然,实现这些目标必须以良好的燃油经济性、低噪声、不需维修操作和高可靠性为前提。另外,... 日产公司研制了一种用于1991年新型Sentra汽车的GA16DE发动机。开发此发动机的主要目标是使发动机在中低速时有足够大的扭距和平稳的加速响应。当然,实现这些目标必须以良好的燃油经济性、低噪声、不需维修操作和高可靠性为前提。另外,由于采用了双凸轮轴结构,还必须使用外形尺寸紧凑。该发动机采用了按空气动力学设计的超长进气系统、可变配气正时控制机构、低摩擦、不需调整、直接作用的气门系统、双向喷油器和一个两级凸轮驱动系统从而实现了设计目标。本文介绍主要的开发目标、发动机的基本结构特点和主要零部件。 展开更多
关键词 日产公司 进气系统 燃油经济性 气门杆 可变气门正时 新型发动机 控制机构 开发目标 扭距 配气正时
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紫杉醇加卡铂密集给药方案对晚期卵巢癌的疗效观察
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作者 Noriyuki Katsumata makoto yasuda Fumiaki Takahashi 《中国处方药》 2009年第11期45-45,共1页
背景及目的:紫杉醇和卡铂每3周给药1次是晚期卵巢癌的标准治疗方案。在该方案的基础上加用其它药物以提高患者存活率的结果令人失望。本研究比较了,密集给药方案与传统的紫杉醇和卡铂方案对晚期卵巢癌的疗效。
关键词 晚期卵巢癌 疗效观察 给药方案 紫杉醇 卡铂 标准治疗方案 周给药 存活率
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Synthetic Application of Indium Hydride
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作者 Akio Baba Naoki Hayashi +1 位作者 makoto yasuda Ikuya Shibata 《复旦学报(自然科学版)》 CAS CSCD 北大核心 2007年第5期563-,共1页
1 Results Recently much interest was focused on the indium chemistry. Barbier and, Reformatsky types of reactions are main streams of the chemistry. The synthetic application of indium hydride (HInCl2), however, has b... 1 Results Recently much interest was focused on the indium chemistry. Barbier and, Reformatsky types of reactions are main streams of the chemistry. The synthetic application of indium hydride (HInCl2), however, has been just started in contrast to the chemistry of the same 13th group of elements such as aluminum and boron hydrides. At first we generated the hydride by the transmetallation between Bu3SnH and InCl3, and then found it has both considerable stability and reactivity, and the hydride could b... 展开更多
关键词 indium hydride hydroindation RADICAL
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