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Profit loss indicator:a novel maintenance indicator applied for integrated planning

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Advances in Manufacturing 2015年第2期3卷 139-150页

作者： Harald RФdseth Terje Skarlo per SchjФlberg Department of Production and Quality Engineering Norwegian University of Science and Technology Department of Technology SФr-TrФndelag University College

In production environment today, ＂silo think- ing＂ is a challenge where controlling an asset associated with several disciplines and departments can lead to a sub- optimal result. This requires a more integrated approach with an integrated planning （IPL） framework. In this framework novel maintenance key performance indicators （KPIs） are needed. The purpose of this article is to develop the novel maintenance KPI profit loss indicator （PLI）. This indicator is based on measuring both on the ＂hidden fac- tory＂ and waste in production, presenting it as a financial measure. The notion ＂hidden factory＂ is used as a meta- phor for measuring the time losses in industry through the maintenance KPI overall equipment effectiveness （OEE）. This indicator divides the time losses into availability losses, performance losses and quality losses. In addition, a financial measure for waste based on literature from Toyota production system （TPS） and waste treatment and disposal is also included in PLI. Through a case study in the saw mill industry PLI is demonstrated and evaluated. It is expected that this indicator will be demonstrated in several industry branches in the future.

关键词： Integrated planning (IPL) - Maintenanceperformance Key performance indicator (KPI) Hidden factory Waste Asset management

Are ATXN2 variants modifying our understanding about neural pathogenesis,phenotypes,and diagnostic?

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Neural Regeneration Research 2022年第11期17卷 2445-2447页

作者： Jose Miguel Laffita-Mesa Martin Paucar per Svenningsson Department of Clinical Neuroscience(CNS) Karolinska Universitetssjukhuset

ATXN2 one gene with multiple phenotype effects:ATXN2 gene encodes a cytosolic protein(ataxin-2)with pleiotropic functions(see below).This gene contains a number of exonic Cytosine-Adenine-Guanine(CAG)-repeats which encodes a polyglutamine tract(polyQ)in the N-terminal intrinsically disordered region(IDR)of the ***2CAG repeats are interrupted by CAA codons which is relevant only for DNA and RNA but not for protein since CAA also encodes glutamine(Q).

关键词： pathogenesis neural interrupted

Leaf-inhabiting endophytic fungi of European Beech (Fagus sylvatica L.) co-occur in leaf litter but are rare on decaying wood of the same host

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Fungal Diversity 2013年第3期60卷 43-54页

作者： Martin Unterseher Derek peršoh Martin Schnittler Institute of Botany and Landscape Ecology Ernst-Moritz-Arndt University GreifswaldGrimmer Str.8817487 GreifswaldGermany Department Mykologie University BayreuthUniversitätsstr.3095440 BayreuthGermany

Many microfungi are able to live in living plant *** contrast to plant pathogens and parasites the socalled endophytic fungi do not cause obvious disease symptoms in their ***,they constitute an ubiquitous active component in direct and multitrophic *** present study was conducted to assess the level of overlap of cultivable microfungi in living and decaying tissues of European Beech(Fagus sylvatica L.)from a forest stand in North-Eastern *** focus lay on the hypothesized fall-spring relationship of leaf-inhabiting forest endophytes,which means that endophytes from autumn leaves persist as saprobes in litter or dead wood,sporulate and re-invade living leaves in *** cultures were isolated from living leaves,leaf litter and dead wood still attached to the tree by dilution-to-extinction cultivation in the years 2007–*** of species identity,species richness and species composition were based on microscopic identification and of sequencing the fungal DNA‘barcode’ITS(internal transcribed spacer).Species richness of litter-inhabiting microfungi equaled that of wood-inhabiting fungi and exceeded that of leaf *** most distinctive species assemblage was observed on wood,fungal species composition in living leaves and leaf litter were also significantly different from each *** the other hand a considerable compositional and phylogenetic overlap between leaf and litter fungi was revealed with phylogenetics,cluster analysis and non-metric multidimensional *** taxa accounting most to the similarity between living and decaying leaves belonged to Capnodiales,Xylariales,Diaporthales and ***,data from cultivated leaf-inhabiting beech endophytes were compared with a fungal 454 sequence data set from beech *** analysis allowed the partition of species lists into active fungal endophytes,fungal“epiphytes”and dormant fungal propagules.

关键词： Substrate turnover Community composition Fungal diversity Fungal life cycle Dilution-to-extinction cultivation

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Editorial

Control Theory and Technology 2019年第2期17卷 119-120页

作者： Tielong SHEN Lars ERIKSSON per TUNESTAL Sophia University Japan Linkoping University Sweden Lund University Sweden

Control theory is the field that is deeply connected with *** control a physical process or a dynarnica!system,the control law,so-called control algorithm,is usually deduced in mathematical *** leads a lot of control theorist to work on"pure control theory"and leave from the physical *** gap between control theory and practice is sometimes pointed out by the engineers,since a lot of advaneed control methods provided by the research comm unity of control theory cannot be directly implemented for solving many in dustrial *** problem plays the role of bridge between the theoretical research and industrial ***,a benchmark problem is proposed by academic community or jointly with industrial community to highlight challengi ng issues in a focused problem with comm on interested practical backgro *** control problem,many technical committees of international federation of automatic control(IFAC)proposed a lot of benchmark problems in the *** benchmark problems attracted attention from both of theorist and control practitioners,especially younger researchers and students,and pushed control theorist to challenge practical problem and innovation in industrial control *** special issue focused on the benchmark problems in automotive system control which are mainly organized by I FAC technical committee and the related community such as the society of instrument and control engineers(SICE),Japan.

关键词： Japan SICE IFAC

A direct solver with O（N） complexity for integral equations on one-dimensional domains

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Frontiers of Mathematics in China 2012年第2期7卷 217-247页

作者： Adrianna GILLMAN Patrick M. YOUNG per-Gunnar MARTINSSON Department of Applied Mathematics University of Colorado at Boulder BoulderCO 80309-0526 USA

An algorithm for the direct inversion of the linear systems arising from NystrSm discretization of integral equations on one-dimensional domains is described. The method typically has O（N） complexity when applied to boundary integral equations （BIEs） in the plane with non-oscillatory kernels such as those associated with the Laplace and Stokes＇ equations. The scaling coefficient suppressed by the ＂big-O＂ notation depends logarithraically on the requested accuracy. The method can also be applied to BIEs with oscillatory kernels such as those associated with the Helmholtz and time-harmonic Maxwell equations; it is efficient at long and intermediate wave-lengths, but will eventually become prohibitively slow as the wave-length decreases. To achieve linear complexity, rank： deficiencies in the off-diagonal blocks of the coefficient matrix are exploited. The technique is conceptually related to the H- and H2-matrix arithmetic of Hackbusch and coworkers, and is closely related to previous work on Hierarchically Semi-Separable matrices.

关键词： Direct solver integral equation fast direct solver boundary value problem boundary integral equation hierarchically semi-separable matrix MSC 65R20,65F05

Bracken-induced increase in soil P availability, along with its high P acquisition efficiency, enables it to invade P-deficient meadows

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Journal of Plant Ecology 2022年第4期15卷 783-794页

作者： Antun Jelinčić Nina Šajna Željka Zgorelec Aleksandra perčin Ćire Truhelke 1510000 ZagrebCroatia University of Maribor Faculty of Natural Sciences and MathematicsDepartment of BiologyMariborSlovenia University of Zagreb Faculty of AgricultureDepartment of General AgronomyZagrebCroatia

Changes in soil chemistry after invasion by bracken(Pteridium aquilinum)have been studied in heathlands,but comparable studies in meadows are *** investigated if bracken invasion into P-deficient meadows alters the soil nutrient-resource pool,as well as the mechanisms behind it linked to soil processes and bracken ***,we investigated how community composition responds to differences in soil chemistry before and after the *** and plant material sampling,along with vegetation survey,were performed during bracken peak *** analyses included analysis of variance and canonical correspondence analysis(CCA).Bracken invasion increased soil P availability,soil organic C concentration,as well as C:N,C:S and N:S ratios,while decreasing Fe and Co *** pinnae were rich in P,and its rhizomes were rich in K,whereas N:P of pinnae and rhizomes was *** showed contrasting abundance patterns of frequent meadow species related to P and K *** lanatus exhibited competitive advantage under extremely low P *** in P availability under bracken may have occurred through promoting the leaching of Fe and *** increasing P availability for its growth and increasing N limitation for other species,bracken can gain a competitive advantage from the soil resource-niche *** ability to increase soil P availability,along with the physiological mechanisms behind its high P acquisition efficiency,seem to differentiate bracken from other species of competitive ecological strategy,which are mainly confined to nutrient-rich *** enabled bracken to invade P-deficient meadows.

关键词： Pteridium aquilinum vegetation succession biogeochemical processes plant–soil feedbacks Holcus lanatus phosphorus limitation plant invasion

Constrained optimal steady-state control for isolated traffic intersections

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Control Theory and Technology 2014年第1期12卷 84-94页

作者： Jack HADDAD David MAHALEL Ilya IOSLOVICH per-Olof GUTMAN Technion Sustainable Mobility and Robust Transportation (T-SMART) Laboratory Technion - Israel Institute of Technology Haifa 32000 Israel

The steady-state or cyclic control problem for a simplified isolated traffic intersection is considered. The optimization problem for the green-red switching sequence is formulated with the help of a discrete-event max-plus model. Two steady-state control problems are formulated： optimal steady-state with green duration constraints, and optimal steady-state control with lost time. In the case when the criterion is a strictly increasing, linear function of the queue lengths, the steady-state control problems can be solved analytically. The structure of constrained optimal steady-state traffic control is revealed, and the effect of the lost time on the optimal solution is illustrated.

关键词： Steady-state control Discrete-event models Isolated traffic intersections

A comparison of lower limb stiffness and mechanical muscle function in ACL-reconstructed,elite,and adolescent alpine ski racers/ski cross athletes

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Journal of Sport and Health Science 2018年第4期7卷 416-424页

作者： Matthew J.Jordan per Aagaard Walter Herzog Canadian Sport Institute Calgary Calgary AB T2N IN4Canada Department of Sports Science and Clinical Biomechanics SDU Muscle Research ClusterUniversity of Southern DenmarkOdense DK-5230Denmark Human performance Laboratory University of CalgaryCalgaryAB T2N IN4Canada Corresponding author.E-mail address： mjordan@ucalgary.ca

Purpose： The aim of this study was to compare mechanical muscle function in the eccentric/concentric phases of vertical bilateral jumping in anterior cruciate ligament-reconstructed （ACLR）, elite （ELITE）, and adolescent （ADOL） alpine ski racers and ski cross athletes. Methods： Alpine ski racers/ski crossers （ACLR： n = 12, age = 26.7 ± 3.8 years; ELITE： n = 12, age = 23.9 ± 3.0 years; ADOL： n = 12, age = 17.8 ± 0.7 years; females： n = 6 per group, males： n = 6 per group） performed 5 maximal countermovement jumps （CMJs） and 5 squat jumps. The ground reaction forces for each limb were analyzed using dual force plate recording to obtain body center of mass （BCM） velocity, displacement, and power. The eccentric deceleration （ECC） and concentric phases were determined from BCM velocity. CMJ net concentric and ECC impulses were calculated （body mass normalized） along with the peak and mean BCM power and maximal vertical jump height. CMJ lower limb stiffness （LLS） was determined by the slope of the ground reaction forces vs. the BCM displacement curve over the ECC phase. Concentric and ECC asymmetry indices were calculated for each leg, and the left vs. right LLS was compared. Outcome measures （reported as mean ± SD） calculated as a 5-jump mean were normalized to body mass and compared using an analysis of variance. Results： No between-group differences were found for peak and mean power or jump heights. There were no group differences for LLS or net concentric phase impulse, but the net ECC impulse was lower in the ADOL group compared with ELITE skiers （ADOL： 1.33 ± 0.32 Ns/kg; ELITE： 1.59 ± 0.16 Ns/kg; p 〈 0.05）. Although no group differences were found for ECC asymmetry indices, a group × limb interaction was found for LLS （p 〈 0.01）, which was systematically higher in the right vs. the left limb of ADOL skiers （right： 54.1 ± 17.9 N/m/kg; left： 48.7 ± 15.7 N/m/kg;p 〈 0.01）. Conclusion： ADOL skiers demonstrated decreased ECC impulse and systematic right limb dominance in

关键词： Between-limb asymmetry Injury prevention Knee injuries Muscle power Vertical jump

Measurement-while-drilling technique and its scope in design and prediction of rock blasting

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International Journal of Mining Science and Technology 2016年第4期26卷 711-719页

作者： Rai Piyush Schunnesson Hakan Lindqvist per-Arne Kumar Uday Department of Mining Engineering Indian Institute of Technology Banaras Hindu University Varanasi 221005 India Division of Mining and Geotechnical Engineering Lulea Technological University Lulea 97187 Sweden Department of Mining Engineering Lulea Technological University Lulea 97187 Sweden Division of Operations and Maintenance Engineering Lulea Technological University Lulea 97187 Sweden

With rampant growth and improvements in drilling technology, drilling of blast holes should no longer be viewed as an arduous sub-process in any mining or excavation process. Instead, it must be viewed as an important opportunity to quickly and accurately measure the geo-mechanical features of the rock mass on-site, much in advance of the downstream operations. It is well established that even the slightest variation in lithology, ground conditions, blast designs vis-a-vis geologic features and explosives performance, results in drastic changes in fragmentation results. Keeping in mind the importance of state-of-the-art measurement-while-drilling （MWD） technique, the current paper focuses on integrating this technique with the blasting operation in order to enhance the blasting designs and results. The paper presents a preliminary understanding of various blasting models, blastability and other related concepts, to review the state-of-the-art advancements and researches done in this area. In light of this, the paper highlights the future needs and implications on drill monitoring systems for improved information to enhnnrp th~ hl^tin~ r^HIt~

关键词： Rock blasting Drill monitoring parameters Rock factor Drill rod vibrations