检索结果-南通市图书馆

做好改变准备:IT领导者面临全新挑战——EDUCAUSE 2023年度十大IT议题(二)

第十一届IFTOMM世界大会

作者： Juha-Matti Kivinen pekka Salmenperā Michel Cotsaftis Tampere University of Technology Laboratory of Machine Dynamics P.O.Box 589 FIN-33101 Tampere Finland Tampere University of Technology Laboratory of Machine Dynamics P.O.Box 589 FIN-33101 Tampere Finland Ecole Centrale d’Electronique Laboratoire des Techniques Mécatroniques et Electroniques 53 rue de Grenelle 75007 Paris France Tel +33 1 44390602

＜正＞A set of rolls compressed together is a commonly used arrangement in paper finishing processes, for improving the surface properties of paper web going through the contact zones （nips） between the rolls. The nip contact is realised by using both hydraulic loading and electro-mechanical driving mechanisms. During the past two decades, the combination of AC-motors and inverters became the state of the art since accurate speed regulation is relatively easy to achieve. In nip unit system one of the rolls is a master, controlled by speed feedback and the other one is a slave, controlled by torque feedback. The fundamental task is to adjust the torque ratio of the two rolls so, that neither harmful transient nor harmonic oscillations could exist, in order to eliminate web brakes and mechanical failures. In this study an experimental nip unit is examined in order to obtain the most favourable driving conditions, to eliminate previously stated vibration phenomena. The diagnostic equipment comprises speed and torque measurements. Temperature is held constant and information is sent wireless to a PC where the control program is executed. Usual drive control is limited and should be amended beyond some preciseness threshold due to the nature of nip contact.

关键词： Machine dynamics Calenders Coaters Paper finishing Nip oscillations

来源： cnki会议评论

在线全文

cnki会议

学校读者我要写书评

暂无评论

中国教育网络 2022年第12期 35-37页

作者： Tonya Bennett pekka Kahkipuro Trisha Clay Pablo Molina Pegah K.Parsi 杨望(翻译) 不详东南大学

EDUCAUSE日前发布了《2023年度十大IT议题:基础模型》报告,描述了高校未来将如何发展的基础模型(Foundation Models),这些模型由领导力、数据、工作和学习三个主题构建而成。与人工智能的基础模型一样,高等教育的基础模型会带来巨大好处... 详细信息

EDUCAUSE日前发布了《2023年度十大IT议题:基础模型》报告,描述了高校未来将如何发展的基础模型(Foundation Models),这些模型由领导力、数据、工作和学习三个主题构建而成。与人工智能的基础模型一样,高等教育的基础模型会带来巨大好处,可能代表着学校前进的最佳路线。本刊将逐期刊载该报告。

关键词： EDUCAUSE 人工智能最佳路线高等教育基础模型领导力 (二) 主题构建

在线全文

学校读者我要写书评

暂无评论

于韦斯屈莱─芬兰的技术中心

技术经济与管理研究 1996年第5期 17-18页

作者： pekka Kettunen 朱关鑫李富明

Effects of Feeding Intensity and Ca:P Ratio on Foot Welfare in Blue Foxes (<i>Vulpes lagopus</i>)

在线全文

学校读者我要写书评

暂无评论

Open Journal of Animal Sciences 2014年第4期4卷 153-164页

作者： Hannu T. Korhonen pekka Eskeli Teijo Lappi Hanna Huuki Juhani Sepponen MTT Agrifood Research Finland Animal Production Research Kannus Finland

The aim was to clarify effects of ad libitum and restricted feeding with Ca:P ratios on foot welfare in blue foxes. Experiment was started at weaning on August 6th and finished at pelting on November 26th, 2013. Treatments were: 1) restricted feeding, Ca:P ratio 1.5:1;2) restricted feeding, Ca:P ratio 2.9:1;3) restricted feeding Ca:P ratio control level;4) ad libitum feeding, Ca:P ratio 1.5:1;5) ad libitum feeding, Ca:P-ratio 2.9:1;6) ad libitum feeding Ca:P ratio control level. Body growth variables, feed intake and welfare variables were measured. The behaviour was video recorded. Foreleg carpal joint angle as an indicator of leg weakness and the fox’s ability to move were evaluated. During weeks 32 - 35 and 37 - 47 animals from restricted groups ate 60% - 65% and 67% - 68% of the given feed, respectively. Body weight gain was faster in foxes fed ad libitum than with a restricted diet (P ad libitum groups compared to restricted ones. The body condition score was significantly (P ad libitum animals. Body length was greater for ad libitum than for restricted groups (P ad libitum and restricted groups

关键词： Farmed Fox Animal Welfare Feet Condition Feeding Level Animal Production

Impact of Heat Load Location and Strength on Air Flow Pattern with a Passive Chilled Beam System

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Impact of Heat Load Location and Strength on Air Flow Patter...

TheFirstInternationalCon...

作者： Risto Kosonen pekka Saarinen Alex Hole Hannu Koskela Halton Oy Finnish Institute of Occupational Health Arup

A chilled beam is a source of natural convection, creating a flow of cold air directly into the occupied zone. Experiments have been conducted in a mock up of an office room to study the air velocities in the occupied spaces. In addition, velocity profiles of a passive beam are registered with underneath heat loads when the cool and warm air flows interact. Experimental laboratory study shows that the underneath heat gains, even when no upward plume is generated and the dummy only affects as a flow obstacle, have a significant effect on the velocity profile. Furthermore in an actual occupied office environment, the thermal plumes and the supply air diffuser mix effectively the whole air volume. The maximum air velocity measured was still below 0.25 m/s with the high heat gain of 164 W/m2. The results demonstrate that a simplified analysis of an undisturbed convection flow can not accurately describe air movement and draught risk.

关键词： Chilled beam Thermal plume Air diffusion Draught risk

来源： cnki会议评论

在线全文

cnki会议

学校读者我要写书评

暂无评论

鼠脑神经元与胶质细胞pH调节机制的异同

中国应用生理学杂志 1996年第3期12卷 229-229,246页

作者：欧阳一冰 pekka Melergard BoK Siesjo 白求恩医科大学应用基础医学研究所瑞典隆德大学脑研究实验室

鼠脑神经元与胶质细胞ｐＨ调节机制的异同欧阳一冰１ＰｅｋｋａＭｅｌｅｒｇａｒｄ２ＢｏＫＳｉｅｓｊｏ２（１白求恩医科大学应用基础医学研究所，长春１３００２１；２瑞典隆德大学脑研究实验室）细胞内ｐＨ（ｐＨｉ）和细胞外ｐＨ（... 详细信息

鼠脑神经元与胶质细胞ｐＨ调节机制的异同欧阳一冰１ＰｅｋｋａＭｅｌｅｒｇａｒｄ２ＢｏＫＳｉｅｓｊｏ２（１白求恩医科大学应用基础医学研究所，长春１３００２１；２瑞典隆德大学脑研究实验室）细胞内ｐＨ（ｐＨｉ）和细胞外ｐＨ（ｐＨｅ）的变化会影响脑细胞的许多生...

关键词：脑神经元胶质细胞 pH值生理病理脑缺血

在线全文

学校读者我要写书评

暂无评论

超越艺术佩卡·萨米宁访谈录

室内设计与装修 2012年第10期 99-101页

作者： pekka Salminen

一直以来,提起北欧设计,便会让人联想到简约、纯粹等语词,而在北欧设计中芬兰设计因其独特的历史与文化而独树一帜。也许从商业性的角度考量,我们无法从当下的芬兰设计中得到许多启发,但我们可以从他们的设计中,看到平实的设计态度,这... 详细信息

一直以来,提起北欧设计,便会让人联想到简约、纯粹等语词,而在北欧设计中芬兰设计因其独特的历史与文化而独树一帜。也许从商业性的角度考量,我们无法从当下的芬兰设计中得到许多启发,但我们可以从他们的设计中,看到平实的设计态度,这正是当下中国设计界所缺乏的正确态度。佩卡·萨米宁是一位典型的芬兰设计师,为人非常低调内敛,在其职业生涯中,设计出了许多让人印象深刻的作品,其作品在艺术性与功能性之间保持了非常好的平衡。

关键词：艺术性设计师职业生涯芬兰商业性北欧作品

在线全文

学校读者我要写书评

暂无评论

还原真实的芬兰教育——对话芬兰先锋教师

新课程评论 2018年第2期 123-128页

作者：查敏 pekka Peura 21世纪研究院芬兰Startup High School Martinlaakson高中

“在座的各位可能都听说芬兰的教育非常出色。但我想说，我们的教育系统其实和你们的一样，也有很多问题。”在2017杭州名师名校长论坛上，一位体型瘦高的年轻演讲者正操着一口略带口音的英语做开场白。台下坐着来自中国各地的老师和校长。

关键词：教育系统芬兰教师对话还原校长老师