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Master Slave Torque Control of Roll Press Unit

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Master Slave Torque Control of Roll Press Unit

Broiler Tissue Enrichment with Docosahexaenoic Acid (DHA) through Dietary Supplementation with Aurantiochytrium limacinumAlgae

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

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Food and Nutrition Sciences 2018年第10期9卷 1160-1173页

作者： Colm A. Moran jason D. Keegan Kirsi Vienola juha Apajalahti Alltech SARL Vire France Alltech’s European Bioscience Centre Dunboyne Ireland Alimetrics Ltd. Espoo Finland

The omega-3 fatty acid (n-3 FA) content of broiler tissues can be increased through dietary supplementation of hens with n-3 FA-rich microalgae. The aim of this study was to evaluate the effect of three different dietary inclusion levels of a docosahexaenoic acid (DHA)-rich microalgae (AURA) on broiler performance and the enrichment of tissues with n-3 FA. The randomized study was conducted using 352 birds, housed in 32 pens with 11 birds per pen. Pens were randomly assigned to one of four treatments, with each treatment replicated 8 times. The treatments included one unsupplemented control (0%) and three wheat-soya based experimental diets supplemented with AURA at a level of 0.5%, 1.5% and 2.5% for the starter, grower and finisher periods. Birds were weighed on days 0, 10, 24, 35 and 41, and feed intake was recorded per pen. On day 41, five birds per treatment were euthanized and individually weighed. Thigh muscle, breast muscle, liver, kidney and skin samples were taken post-mortem, freeze dried and DHA content quantified, following fat extraction and methylation, by GC-FID (AOAC 996.06 method). Performance and tissue data were analyzed by ANOVA with Dunnett’s (2-sided) post-hoc test to determine the differences between the mean values for each treatment. Dietary supplementation with AURA had no effect on body weight or feed intake during any period of the study. For thigh muscle, kidney and skin the DHA increased linearly (P < 0.05) with increasing level of dietary AURA, whilst there was a quadratic response in uptake of DHA in breast muscle and liver. The study demonstrated the potential of efficiently enriching broiler meat and organs with DHA by feeding AURA.

关键词： Algae Broilers Meat DHA Enrichment Omega 3

基于NoSREx实验的积雪演化及微波辐射分析研究

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冰川冻土 2022年第5期44卷 1501-1512页

作者：周静恬邱玉宝黄琳 juha LEMMETYINEN 石利娟李青寰施建成中国科学院空天信息创新研究院数字地球重点实验室北京100094 可持续发展大数据国际研究中心北京100094 中国科学院大学北京100049 中国科学院空天信息创新研究院-芬兰气象研究所北极观测联合研究中心(jRC-AO) 芬兰索丹屈莱FI-99660 芬兰气象研究所北极空间中心芬兰赫尔辛基FI-00560 中国科学院国家空间科学中心北京100190

在被动微波雪水当量反演中,积雪物理参数随时间的变化特征影响着反演精度,为理解积雪随时间演化的特征及其对微波辐射亮温的影响,本研究选用2009—2013年北欧积雪实验(Nordic Snow Radar Experiment,NoSREx)积雪地面观测和微波辐射测量... 详细信息

在被动微波雪水当量反演中,积雪物理参数随时间的变化特征影响着反演精度,为理解积雪随时间演化的特征及其对微波辐射亮温的影响,本研究选用2009—2013年北欧积雪实验(Nordic Snow Radar Experiment,NoSREx)积雪地面观测和微波辐射测量数据,通过雪深和温度把雪期分为积累期(10月—次年2月)、稳定期(2—4月)和消融期(4—5月),发现各个雪期的积雪演化特征为:雪颗粒形状在积累期前期以融态颗粒(Melt Forms,MF)为主,积累期后期和稳定期以圆形颗粒、片状颗粒、深霜为主,消融期以MF为主;整个雪季底层雪粒径从小变大再变小的过程,粒径最大值出现在稳定期的2至3月,约为2.5~4.0 mm,均出现在近地表雪层,而表层粒径较小且较为稳定。通过雪深和微波亮度差(18~37 GHz)的关系分析,表明亮温差在不同雪期对于雪深的依赖关系不同,在积累期和稳定期,雪深变化与亮温差变化具有明显的正相关;在消融期由于积雪融化的影响,其相关性较差;基于多层积雪微波辐射模型(MEMLS)构建了一维微波辐射模拟环境,模拟表明MEMLS模型在3个雪期的垂直极化10.65 GHz和18.7 GHz模拟结果较37 GHz和90 GHz更好;10.65 GHz V极化在入射角为50°且稳定期时,微波亮温模拟均方根误差(RMSE)结果最小,为2.49 K。3个雪期90 GHz模拟结果水平极化优于垂直极化,由于受表层积雪变化影响,90 GHz模拟结果较不稳定,尤其是消融期时,RMSE最小也达到了42.7 K。本研究有助于理解积雪随时间演化的特征及其对微波辐射模拟的影响,表明在被动微波雪水当量反演算法中,针对不同积雪期需要考虑积雪演化动态过程。

关键词：积雪微波辐射亮温 NoSREx实验 MEMLS模型

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Pinus taedacDNA Microarray as a Tool for Candidate Gene Identification for Local Red/Far-Red Light Adaptive Response in Pinus sylvestris

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American journal of Plant Sciences 2013年第3期4卷 479-493页

作者： Sonali S. Ranade Sara Abrahamsson juha Niemi María Rosario García-Gil Umea Plant Science Centre Department of Forest Genetics and Plant Physiology Swedish University of Agricultural Sciences Umea Sweden.

Light quality response is a vital environmental cue regulating plant development. Conifers, like angiosperms, respond to the changes in light quality including the level of red (R) and far-red (FR) light, which follows a latitudinal cline. R and FR wavelengths form a significant component of the entire plant life cycle, including the initial developmental stages such as seed germination, cotyledon expansion and hypocotyl elongation. With an aim to identify differentially expressed candidate genes, which would provide a clue regarding genes involved in the local adaptive response in Scots pine (Pinus sylvestris) with reference to red/far-red light;we performed a global expression analysis of Scots pine hypocotyls grown under two light treatments, continuous R (cR) and continuous FR (cFR) light;using Pinus taeda cDNA microarrays on bulked hypocotyl tissues from different individuals, which represented different genotypes. This experiment was performed with the seeds collected from northern part of Sweden (Ylinen, 68?N). Interestingly, gene expression pattern with reference to cryptochrome1, a blue light photoreceptor, was relatively high under cFR as compared to cR light treatment. Additionally, the microarray data analysis also revealed expression of 405 genes which was enhanced under cR light treatment;while the expression of 239 genes was enhanced under the cFR light treatment. Differentially expressed genes were re-annotated using Blast2GO tool. These results indicated that cR light acts as promoting factor whereas cFR antagonises the effect in most of the processes like C/N metabolism, photosynthesis and cell wall metabolism which is in accordance with former findings in Arabidopsis. We propose cryptochrome1 as a strong candidate gene to study the adaptive cline response under R and FR light in Scots pine as it shows a differential expression under the two light conditions.

关键词： Conifer Cryptochrome1 Far-Red Light Microarray Red Light Scots Pine

Responses of aboveground biomass of alpine grasslands to climate changes on the Qinghai-Tibet Plateau

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journal of Geographical Sciences 2018年第12期28卷 1953-1964页

作者：王力于海英张强徐韵佳陶泽兴 ALATALO juha 戴君虎 College of Atmospheric Science Lanzhou University Qinghai Institute of Meteorological Science Institute of Arid Meteorology China Meteorological Administration College of Agroforestry Engineering and Planning Tongren University Key Laboratory of Land Surface Pattern and Simulation Institute of Geographic Sciences and Natural Resources Research CAS University of Chinese Academy of Sciences Department of Biological and Environmental Sciences College of Arts and Sciences Qatar University

Aboveground biomass in grasslands of the Qinghai-Tibet Plateau has displayed an overall increasing trend during 2003–2016, which is profoundly influenced by climate change. However, the responses of different biomes show large discrepancies, in both size and magnitude. By applying partial least squares regression, we calculated the correlation between peak aboveground biomass and mean monthly temperature and monthly total precipitation in the preceding 12 months for three different grassland types(alpine steppe, alpine meadow, and temperate steppe) on the central and eastern Qinghai-Tibet Plateau. The results showed that mean temperature in most preceding months was positively correlated with peak aboveground biomass of alpine meadow and alpine steppe, while mean temperature in the preceding October and February to june was significantly negatively correlated with peak aboveground biomass of temperate steppe. Precipitation in all months had a promoting effect on biomass of alpine meadow, but its correlations with biomass of alpine steppe and temperate steppe were inconsistent. It is worth noting that, in a warmer, wetter climate, peak aboveground biomass of alpine meadow would increase more than that of alpine steppe, while that of temperate steppe would decrease significantly, providing support for the hypothesis of conservative growth strategies by vegetation in stressed ecosystems.

关键词： grasslands aboveground biomass partial least squares Qinghai-Tibet Plateau climate change

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The missing base molecules in atmospheric acid-base nucleation

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National Science Review 2022年第10期9卷 196-208页

作者： Runlong Cai Rujing Yin Chao Yan Dongsen Yang Chenjuan Deng Lubna Dada juha Kangasluoma jenni Kontkanen Roope Halonen Yan Ma Xiuhui Zhang Pauli Paasonen Tuukka Pet?j? Veli-Matti Kerminen Yongchun Liu Federico Bianchi jun Zheng Lin Wang jiming Hao james N.Smith Neil M. Donahue Markku Kulmala Douglas R.Worsnop jingkun jiang State Key joint Laboratory of Environment Simulation and Pollution Control School of Environment Tsinghua University Institute for Atmospheric and Earth System Research/Physics Faculty of Science University of Helsinki Aerosol and Haze Laboratory Beijing Advanced Innovation Center for Soft Matter Science and Engineering Beijing University of Chemical Technology Collaborative Innovation Center of Atmospheric Environment and Equipment Technology Nanjing University of Information Science and Technology Laboratory of Atmospheric Chemistry Paul Scherrer Institute Center for joint Quantum Studies and Department of Physics School of Science Tianjin University Key Laboratory of Cluster Science Ministry of Education of China School of Chemistry and Chemical Engineering Beijing Institute of Technology Shanghai Key Laboratory of Atmospheric Particle Pollution and Prevention (LAP3) Department of Environmental Science and Engineering Fudan University Chemistry Department University of California Center for Atmospheric Particle Studies Carnegie Mellon University Department of Chemistry Carnegie Mellon University Aerodyne Research Inc.

Transformation of low-volatility gaseous precursors to new particles affects aerosol number concentration,cloud formation and hence the *** clustering of acid and base molecules is a major mechanism driving fast nucleation and initial growth of new particles in the ***,the acid-base cluster composition,measured using state-of-the-art mass spectrometers,cannot explain the measured high formation rate of new *** we present strong evidence for the existence of base molecules such as amines in the smallest atmospheric sulfuric acid clusters prior to their detection by mass *** demonstrate that forming(H2SO4)1(amine)1is the rate-limiting step in atmospheric H2SO4-amine nucleation and the uptake of(H2SO4)1(amine)1is a major pathway for the initial growth of *** proposed mechanism is very consistent with measured new particle formation in urban Beijing,in which dimethylamine is the key base for H2SO4nucleation while other bases such as ammonia may contribute to the growth of larger *** findings further underline the fact that strong amines,even at low concentrations and when undetected in the smallest clusters,can be crucial to particle formation in the planetary boundary layer.

关键词： new particle formation acid-base nucleation aerosol polluted urban environment

云南省生态资产与生态系统生产总值核算体系研究

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自然资源学报 2017年第7期32卷 1100-1112页

作者：白杨李晖王晓媛 juha M.Alatalo 江波王敏刘文俊中国科学院西双版纳热带植物园云南勐仑666303 云南大学建筑与规划学院昆明650500 长江水资源保护科学研究所武汉430051 Department of Biological and Environmental Sciences College of Arts and SciencesQatar University 上海市环境科学研究院上海200233

生态系统作为重要的生态资产,为人类提供生态产品和服务,是人类生存和社会经济可持续发展的基础;生态系统生产总值(GEP)是生态资产提供的生态产品与服务价值总和,是生态资产的重要组成部分,也是生态资产对人类福祉的主要贡献。论文以云... 详细信息

生态系统作为重要的生态资产,为人类提供生态产品和服务,是人类生存和社会经济可持续发展的基础;生态系统生产总值(GEP)是生态资产提供的生态产品与服务价值总和,是生态资产的重要组成部分,也是生态资产对人类福祉的主要贡献。论文以云南省为例,分析了生态资产和GEP的内涵、关联与核算体系,评价了云南省2010年生态资产状况及其为受益者提供生态产品和服务价值的总和。评价结果显示:云南省2010年生态资产状况总体良好,林地、灌丛和草地生态系统的质量水平属于良等级;农田生态系统的质量水平差;生物多样性质量水平优。云南省2010年GEP总量为29 869.51亿元,其中,直接产品价值为4 132.69亿元,间接服务价值为25 736.81亿元。2010年GEP是当年该省国内生产总值(GDP)的4.13倍。研究结果表明,生态资产与GEP的核算,可以定量反映生态系统状况及其对区域社会经济发展的支撑作用,并为评估区域生态系统保护成效及建立生态系统可持续管理与绩效考核机制提供科学依据。

关键词：生态资产生态系统生产总值核算云南省

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NOISE ROBUST CHINESE SPEECH RECOGNITION USING FEATURE VECTOR NORMALIZATION AND HIGHER-ORDER CEPSTRAL COEFFICIENTS

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NOISE ROBUST CHINESE SPEECH RECOGNITION USING FEATURE VECTOR...

2000年第16届世界计算机大会

作者： Xia Wang Yuan Dong juha Hkkinen Olli Viikki Nokia(China) Research & Development Center Nokia Research Center Speech and Audio Systems LaboratoryTampereFinland

＜正＞Speaker-dependent,or speaker-trained,isolated word recognition is a key technology behind automatic name dialling *** this paper,we investigate how the feature extraction process should be modified so that a maximum recognition rate could be achieved in Chinese name dialling under clean and noisy operating *** experimental results indicate that the use of higher-order cepstral coefficients improved the recognition rate by 30%. This performance gain is due to the fact that the higher-order cepstral coefficients are expected to carry tonal *** robustness of a system could be improved by integrating the second-order time derivatives in the final feature vector.

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建筑玻璃的热弯和钢化趋于水平化

建筑玻璃与工业玻璃 2001年第4期21卷 34-36页

作者： juha Karisola Glassrobots公司

在过去的15年中对弯玻璃的钢化已经转变为水平方法。当今大量的汽车玻璃和家具工业的制造都使用平钢化设备。小型的汽车厂商和建筑工业仍然在使用老式的垂直设备，但是随着弯钢化技术的发展，这些老式设备正在转化为平钢化设备。使用热... 详细信息

在过去的15年中对弯玻璃的钢化已经转变为水平方法。当今大量的汽车玻璃和家具工业的制造都使用平钢化设备。小型的汽车厂商和建筑工业仍然在使用老式的垂直设备，但是随着弯钢化技术的发展，这些老式设备正在转化为平钢化设备。使用热弯炉进行钢化给大量的建筑玻璃生产带来了无以伦比的优点，同时可以达到很高的光学要求。

关键词：建筑玻璃热弯钢化水平方法