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large deflections of non-prismatic nonlinearly elastic cantilever beams subjected to non-uniform continuous load and a concentrated load at the free end

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Acta Mechanica Sinica 2012年第3期28卷 863-869页

作者： miha Brojan Matjaz Cebron Franc Kosel laboratory for Nonlinear Mechanics Faculty of Mechanical EngineeringUniversity of LjubljanaAskerceva 6SI-1000 LjubljanaSlovenia

This work studies large deflections of slen- der, non-prismatic cantilever beams subjected to a combined loading which consists of a non-uniformly distributed con- tinuous load and a concentrated load at the free end of the beam. The material of the cantilever is assumed to be non- linearly elastic. Different nonlinear relations between stress and strain in tensile and compressive domain are considered. The accuracy of numerical solutions is evaluated by com- paring them with results from previous studies and with a laboratory experiment.

关键词： large deflections Non-prismatic beams Com-bined loading - Generalized Ludwick constitutive law ~ Ma-terial and geometrical nonlinearity

Black locust(Robinia pseudoacacia L.)as a multi-purpose tree species in Hungary and Romania:a review

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Journal of Forestry Research 2018年第6期29卷 1449-1463页

作者： Valeriu-Norocel Nicolescu Cornelia Hernea Beatrix Bakti Zsolt Keseru Borbála Antal Károly Rédei Faculty of Silviculture and Forest Engineering Transylvania University of BrassovSirul Beethoven no.1500123 BrasovRomania Faculty of Horticulture and Forestry Banat’s University of Agricultural Sciences and Veterinary Medicine“King Michael I of Romania”from Timi.oaraCalea Aradului 119300645 TimisoaraRomania Department of Plantation Forestry National Agricultural Research and Innovation Centre Forest Research InstituteFarkasszigetPu¨spo¨klada′ny 4150Hungary Hungarian Horticultural Propagation Material Non-profit Ltd. Sa′rva′rBudapestHungary

Black locust(Robinia pseudoacacia L.) was the first North-American tree species imported to Europe at the beginning of the seventeenth century. It is commonly planted worldwide because of its adaptability to environmental stresses, its valuable wood, easy propagation, frequent and abundant seed production, excellent coppicing,high seedling survival, and relatively high wood yield. In Europe, Romania and Hungary have the most highly-developed black locust growing techniques and *** a result of increasing interest in black locust in many countries, this review aims to provide a comprehensive overview of state-of-the-art site requirements, propagation, improvement and management(including growth and yield as well as use in energy plantations).

关键词： Robinia pseudoacacia Site requirements Selection Propagation Silviculture

Game changer:How Janus kinase inhibitors are reshaping the landscape of ulcerative colitis mana

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World Journal of Gastroenterology 2024年第35期30卷 3942-3953页

作者： Antonio M caballero-Mateos Guillermo Arturo cañadas-de la Fuente Department of Gastroenterology and Hepatology San Cecilio University HospitalGranada 18014Spain Department of Nursing Faculty of Health SciencesUniversity of GranadaGranada 18004Spain

Recent advancements in the treatment landscape of ulcerative colitis(UC)have ushered in a new era of possibilities,particularly with the introduction of Janus kinase(JAK)-signal transducer and activator of transcription *** novel agents offer a paradigm shift in UC management by targeting key signaling pathways involved in inflammatory *** approved JAK inhibitors(JAKis),such as tofacitinib,filgotinib,and upadacitinib,clinicians now have powerful tools to modulate immune responses and gene expression,potentially revolutionizing the treatment algorithm for *** trials have demonstrated the efficacy of JAKis in inducing and maintaining remission,presenting viable options for patients who have failed conventional ***-world data support the use of JAKis not only as first-line treatments but also in subsequent lines of therapy,particularly in patients with aggressive disease phenotypes or refractory to biologic *** rapid onset of action and potency of JAKis have broadened the possibilities in the management strategies of UC,offering timely relief for patients with active disease and facilitating personalized treatment *** safety concerns,including cardiovascular risks and infections,ongoing research and post-marketing surveillance will continue to refine our understanding of the risk-benefit profile of JAKis in UC management.

关键词： Ulcerative colitis Janus kinase inhibitors Filgotinib Tofacitinib Upadacitinib

A Formula for the Non-integer Powers of the laplacian

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Acta Mathematica Sinica,English Series 1999年第1期15卷 21-24页

作者： Zhengxu HeDepartment of Mathematics,University of california,San Diego,la Jolla,ca 92093-0112,USA Department of Mathematics University of California San Diego La Jolla USA

We provide an elementary formula for the non-integer powers of the laplace operator in the Euclidean *** formulas are helpful in establishing the elliptic nature of some pseudo- differential operators arising from the... 详细信息

关键词： laplacian Power of laplacian

Regeneration of waste sintered Nd-Fe-B magnets to fabricate anisotropic bonded magnets

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Journal of Rare Earths 2015年第7期33卷 736-739页

作者：李现涛岳明 ZAKOTNIK miha 刘卫强张东涛左铁镛 College of Materials Science and Engineering Beijing University of Technology

The waste sintered Nd-Fe-B magnets were regenerated as magnetic powders via manually crushing （MC） or hydrogen decrepitation （HD） to fabricate anisotropic bonded magnets. Effect of size distribution on the magnetic properties of the regenerated magnetic MC and HD powders was investigated. For the MC powders, as the particle size decreased, the remanence （Br） increased first, and then decreased again, while the coercivity （Hci） dropped monotonically. The powders with particle size in the range of 200-450μm possessed the best magnetic properties ofBr of 1.22 T and Hci of 875.6 kAJm. The corresponding bonded magnet exhibited magnetic properties ofBr of 0.838 T, Hci of 940.9 kA/m, and （BH）max of 91.4 kJ/m^3, respectively. On the other hand, the liD powders with particle size range of 200-450 μm bore the best magnetic properties Of Br of 1.24 T and Hci of 860.4 kA/m. Compared with magnetic properties of the waste magnet, the powders retained 93.9% of Br and 70.0% of Hci, respectively. The bonded magnet produced from HD powders possessed Br of 0.9 T, Hci of 841.4 kA/m, and （BH）max of 111.6 kJ/m^3, indicating its good potential in practical applications.

关键词： regeneration Nd-Fe-B magnet scraps hydrogen decrepitation anisotropic bonded magnets rare earths

Is the Polar Relative Monodromy of Finite Order? An Example

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Chinese Quarterly Journal of Mathematics 1995年第4期10卷 78-85页

作者： Dirk SIERSMA miha Mathematisch Instituut Universiteit Utrecht P.O.Box

We construct an example of an isolated singularity f: (C3,0)→(C,0) for which oneof the polar relative monodromies is not of finite order,by using a nonisolated singularity with transversal type the A'campo example.

关键词：解析函数单值定理有限阶极相对单值

Recycling of waste Nd-Fe-B sintered magnets by doping with dysprosium hydride nanoparticles

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Journal of Rare Earths 2015年第8期33卷 846-849页

作者：刘卫强李超 ZAKOTNIK miha 岳明张东涛黄秀莲 College of Materials Science and Engineering Beijing University of Technology Earth-panda Advance Magnetic Material Co. Ltd. Anhui Province Key laboratories of Rare Earth Permanent Magnet Materials

Recycling of waste sintered Nd-Fe-B permanent magnets by doping DyH3 nanoparticles was investigated. The effect of the DyH3 nanoparticles on the microstructure and magnetic properties of the recycled magnets was studied. As the DyH3 nanoparticles additive increased, the coercivity of recycled magnet increased gradually. The recycled magnets with DyH3 nanoparticle content between 0.0 wt.% and 1.0 wt.% maintained the remanence （Br）, but, with higher additions, the Br began to decrease rapidly. The best recycled magnet produced contained 1.0 wt.% of DyH3 nanoparticles when compared to the properties of the starting waste sintering magnet. The Hcj, Br and （BH）max values of 101.7%, 95.4%, and 88.58%, respectively, were recovered.

关键词： recycling waste Nd-Fe-B magnet DyH3 nanoparticles magnetic properties rare earths

Water Absorption capacity and Coating Adhesion on Thermally Modified and Not-Modified Spruce Wood(Blue Stained or Free of Blue Stained)

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Journal of Renewable Materials 2023年第12期11卷 4061-4078页

作者： Demiao Chu Redžo Hasanagić Leila Fathi Mohsen Bahmani miha Humar Key lab of State Forest and Grassland Administration on“Wood Quality Improvement&High Efficient Utilization” School of Forestry&Landscape ArchitectureAnhui Agricultural UniversityHefei230036China Faculty of Technical Engineering Department of Wood Science and TechnologyUniversity of BihaćBihać7700Bosnia and Herzegovina Department of Natural Resources and Earth Science Shahrekord UniversityShahrekord64165478Iran Biotechnical Faculty Department of Wood ScienceUniversity of LjubljanaLjubljana1501Slovenia

This study aimed to investigate the water absorption capacity of thermally modified and non-modified spruce and blue-stained spruce *** wettability of wood depends on various factors,including its type,density,porosity,and surface *** can swell and become distorted when exposed to water or humidity,impacting its structural ***,it is crucial to consider the water and water vapour uptake in the wood when choosing materials for applications that are likely to be exposed to *** moisture absorption tests were conducted to assess water absorption capacity,including short-term and long-term water absorption and water vapour *** results showed a significant difference in the long-term exposure to water,which was related to the density of the *** study examined the influence of thermal treatment on the physical properties of wood and observed significant variations in mass change due to coating,indicating differences in adhesion among different wood ***-treated blue-stained Norway spruce demonstrated higher adhesion(5%–15%)compared to air-treated ***,cohesion tests revealed lower cohesion force in blue-stained Norway spruce(approximately 20%–30%)compared to Norway *** study also used industry-standard tests to investigate the adhesion and cohesion of nano-coatings on wood *** results provided valuable information on the properties of coatings applied to wood,which is vital in protecting and decorating wood while also providing preventive protection against wood pests,weathering,and mechanical *** modification in vacuum involves subjecting the wood to a low-pressure environment to remove air and moisture,allowing for deeper and more uniform penetration of treatment *** contrast,wood modification in air relies on the natural circulation of air to facilitate the absorption of chemical treatments,without the need for a vacuum chamber.

关键词： Wood durability long-term exposure moisture absorption wettability absorption

Endangered lowland oak forest steppe remnants keep unique bird species richness in Central Hungary

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Journal of Forestry Research 2022年第1期33卷 343-355页

作者： GáborÓnodi Zoltán Botta‑Dukát Dániel Winkler Tamás Rédei Institute of Ecology and Botany Centre for Ecological ResearchVácrátótHungary Department of Botany and Biodiversity Research University of ViennaViennaAustria Institute of Wildlife Management and Wildlife Biology University of SopronSopronHungary

The biodiversity of natural or semi-natural native,old oak woodlands have high conservation importance,especially in landscapes of monocultural forest plantations and arable *** a wider variety of microhabitats and foraging sources,such old oak forests can provide essential habitat for native forest bird *** conducted a study using bird point counts to compare the forest bird communities of old pedunculate oak(Quercus robur)remnants with native and non-native plantations in central Hungary in a landscape of mostly arable fields,settlements,and monocultural *** surveys were carried out in old oak forest remnants,middle-aged oak,white poplar(Populus alba),hybrid poplar(Populus×euramericana),black locust(Robinia pseudoacacia),and pine(Pinus spp.)*** has been carried out in nine study sites,where all six habitat types were represented(with a few exceptions),to determine total abundance,species richness,Shannon–Wiener diversity,species evenness,dominant and indicator species,and guild *** found that old oak forest remnants were the most diverse habitats among the studied forest types,while hybrid poplar and pine plantations exhibited the lowest avian *** avian guilds most sensitive to the loss of old oak forest remnants were ground foragers,bark foragers,cavity-nesters,residents,and Mediterranean migratory *** habitats were more diverse than non-native *** results suggest that it is important to conserve all remaining high biodiversity old oak stands and to avoid clear-cutting of monocultural plantations in favour of practices such as mixed-species plantations,longer rotation lengths,or retention forestry.

关键词： Forest bird community Bird conservation Old oak forest-steppe remnant Plantation forestry Forest conservation Non-native plantation