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高效CVT混合动力驱动改进运行性能

传动技术 2012年第3期26卷 18-28,33页

作者： bernd-robert hhn hermann Pflaum Claus Lechner Thomas Drxl Gear Research Centre(FZG) Technische Universitt München(Munich)

混合动力驱动可以解决公路车辆的燃油经济性问题,优化了的CVT混合动力驱动是基于两排无级变速传动(CVT)并联的混合动力传动装置。已经证明和常规的柴油动力车辆比较节约燃油超过30%,同时该传动系还提供了良好的运行性能和高的乘坐舒适性... 详细信息

混合动力驱动可以解决公路车辆的燃油经济性问题,优化了的CVT混合动力驱动是基于两排无级变速传动(CVT)并联的混合动力传动装置。已经证明和常规的柴油动力车辆比较节约燃油超过30%,同时该传动系还提供了良好的运行性能和高的乘坐舒适性,可不中断牵引进行内燃机的起动过程和两速度间的换档。本文阐述了该传动系的概念和对动力换档,发动机起动,燃油消耗和能量平衡的试验结果。

关键词：运行性能并联混合驱动柴油混合动力无级变速传动无级变速器多盘离合器同步离合器发动机起动动力换档燃油经济性能量平衡双层储能器

Exploration of chromene-based BioAIEgens

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National Science Review 2024年第3期11卷 47-48页

作者： Fritz E.Kühn Department of Chemistry&Catalysis Research Center School of Natural Sciences Technical University of Munich

Photoemission efficiency is usually higher in solution than in solid *** compounds however, display a reverse behavior. Such a behavior is called aggregation-induced emission(AIE).

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Rbfox1 controls alternative splicing of focal adhesion genes in cardiac muscle cells

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Journal of Molecular Cell Biology 2024年第1期16卷 54-65页

作者： Peter Zorn Jaime Calvo Sánchez Tala Alakhras Barbara Schreier Michael Gekle Stefan hüttelmaier Marcel Köhn Junior Group‘Non-coding RNAs and RBPs in human Diseases’ Medical FacultyUniversity of Halle–Wittenberg06120 Halle(Saale)Germany Julius Bernstein Institute of Physiology Medical FacultyUniversity of Halle–Wittenberg06112 Halle(Saale)Germany Institute of Molecular Medicine Medical FacultyUniversity of Halle–Wittenberg06120 Halle(Saale)Germany

Alternative splicing is one of the major cellular processes that determine the tissue-specific expression of protein ***,it remains challenging to identify physiologically relevant and tissue-selective proteins that are generated by alternative ***,we investigated the target spectrum of the splicing factor Rbfox1 in the cardiac muscle context in more *** using a combination of in silico target prediction and in-cell validation,we identified several focal adhesion proteins as alternative splicing targets of *** focused on the alternative splicing patterns of vinculin(metavinculin isoform)and paxillin(extended paxillin isoform)and identified both as potential Rbfox1 *** analyses suggested that both isoforms are promoted by Rbfox1 due to binding in the *** adhesions play an important role in the cardiac muscle context,since they mainly influence cell shape,cytoskeletal organization,and cell–matrix *** data confirmed that depletion of Rbfox1 changed cardiomyoblast morphology,cytoskeletal organization,and multinuclearity after differentiation,which might be due to changes in alternative splicing of focal adhesion ***,our results indicate that Rbfox1 promotes alternative splicing of focal adhesion genes in cardiac muscle cells,which might contribute to heart disease progression,where downregulation of Rbfox1 is frequently observed.

关键词： Rbfox1 alternative splicing focal adhesion cardiac muscle cells

A Tropical View on Landau-Ginzburg Models

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Acta Mathematica Sinica,English Series 2024年第1期40卷 329-382页

作者： Michael CARL Max PUMPERLA bernd SIEBERT Alfred-Delp-Str.2 73430 AalenGermany IU Internationale hochschule Juri-Gagarin-Ring 15299084 ErfurtGermany AnyscaleInc.2080 Addison St Ste 7BerkeleyCA 94704USA Department of Mathematics The Univ.of Texas at Austin2515 SpeedwayAustinTX 78712USA

This paper,largely written in 2009/2010,fits Landau-Ginzburg models into the mirror symmetry program pursued by the last author jointly with Mark Gross since *** point of view transparently brings in tropical disks of Maslov index 2 via the notion of broken lines,previously introduced in two dimensions by Mark Gross in his study of mirror symmetry for P2.A ma jor insight is the equivalence of properness of the Landau-Ginzburg potential with smoothness of the anticanonical divisor on the mirror *** obtain proper superpotentials which agree on an open part with those classically known for toric *** include mirror LG models for non-singular and singular del Pezzo surfaces,hirzebruch surfaces and some Fano threefolds.

关键词： Landau-Ginzburg model mirror symmetry tropical disk broken line wall structure scattering diagram Gross-Siebert program del Pezzo surface toric degeneration

Next generation multiple access for IMT towards 2030 and beyond

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Science China(Information Sciences) 2024年第6期67卷 448-450页

作者： Zhiguo DING robert SChOBER Pingzhi FAN h.Vincent POOR Department of Computer and Information Engineering Khalifa University Department of Electrical and Electronic Engineering University of Manchester Institute for Digital Communications Friedrich Alexander-University Erlangen-Nurnberg (FAU) CSNMT International Cooperation Research Center (MoST) Southwest Jiaotong University Department of Electrical and Computer Engineering Princeton University

Multiple access techniques are fundamental to the design of wireless communication systems,since many crucial components of such systems depend on the choice of the multiple access technique[1].For example,the use of ...

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Layerwise third-order shear deformation theory with transverse shear stress continuity for piezolaminated plates

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Chinese Journal of Aeronautics 2024年第9期37卷 490-505页

作者： Yingshan GAO Shunqi ZhANG Wei hU Songyun MA bernd MARKERT School of Mechatronic Engineering and Automation Shanghai UniversityShanghai 200444China Key Laboratory of Silicate Cultural Relics Conservation(Shanghai University) Ministry of EducationShanghai 20044China Institute of General Mechanics RWTH Aachen UniversityAachen 52062Germany

Regarding laminated structures,an electromechanically coupled Finite Element(FE)model based on Layerwise Third-Order Shear Deformation(LW-TOSD)theory is proposed for sta-tic and dynamic ***-TOSD ensures the continuity of in-plane displacements and trans-verse shear *** current LW-TOSD can be applied to arbitrary multi-layer laminated structures with only seven Degrees of Freedom(DOFs)for each element node and eliminates the use of the shear correction ***,a shear penalty stiffness matrix is constructed to sat-isfy artificial constraints to optimize the structural shear strain.A dynamic finite element model is obtained based on LW-TOSD using the hamilton's ***,the accuracy of the current model is validated by comparing with literature and ABAQUS ***,this study carries out numerical investigations of piezolaminated structures for different width-to-thickness ratios,length-to-width ratios,penalty stiffness matrix,boundary conditions,electric fields and dynamics.

关键词： Laminated structures Piezolaminated structures Third-order shear deformation theory Shear stress continuity Electromechanically coupled

Predicting the coefficient of friction in a sliding contact by applying machine learning to acoustic emission data

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Friction 2024年第6期12卷 1299-1321页

作者： robert GUTIERREZ Tianshi FANG robert MAINWARING Tom REDDYhOFF Tribology Group Department of Mechanical EngineeringImperial College LondonExhibition RoadLondon SW72AZUK Shell Global Solutions(US)Inc.Shell Technology Center houston 3333 Highway 6 SouthHoustonTX 77082USA Shell International Petroleum Company Limited Shell CentreYork RoadLondon SE17NAUK

It is increasingly important to monitor sliding interfaces within machines,since this is where both energy is lost,and failures *** emission(AE)techniques offer a way to monitor contacts remotely without requiring transparent or electrically conductive ***,acoustic data from sliding contacts is notoriously complex and difficult to ***,we simultaneously measure coefficient of friction(with a conventional force transducer)and acoustic emission(with a piezoelectric sensor and high acquisition rate digitizer)produced by a steel‒steel rubbing *** data is then used to train machine learning(ML)algorithms(e.g.,Gaussian process regression(GPR)and support vector machine(SVM))to correlated acoustic emission with *** training requires the dense AE data to first be reduced in size and a range of processing techniques are assessed for this(e.g.,down-sampling,averaging,fast Fourier transforms(FFTs),histograms).Next,fresh,unseen AE data is given to the trained model and the resulting friction predictions are compared with the directly measured *** is excellent agreement between the measured and predicted friction when the GPR model is used on AE histogram data,with root mean square(RMS)errors as low as 0.03 and Pearson correlation coefficients reaching ***,predictions remain accurate despite changes in test conditions such as normal load,reciprocating frequency,and stroke *** paves the way for remote,acoustic measurements of friction in inaccessible locations within machinery to increase mechanical efficiency and avoid costly failure/needless maintenance.

关键词： acoustic emission condition monitoring friction machine learning Gaussian process regression support vector machine

A general mirror equivalence theorem for coset vertex operator algebras

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Science China Mathematics 2024年第10期67卷 2237-2282页

作者： robert McRae Yau Mathematical Sciences Center Tsinghua UniversityBeijing 100084China

We prove a general mirror duality theorem for a subalgebra U of a simple conformal vertex algebra A and its commutant V=ComA(U).Specifically,we assume that A≌■_(i∈I)U_(i)■V_(i) as a U■V-module,where the U-modules Uiare simple and distinct and are objects of a semisimple braided ribbon category of Umodules,and the V-modules Viare semisimple and contained in a(not necessarily rigid) braided tensor category of *** also assume U=ComA(V).Under these conditions,we construct a braid-reversed tensor equivalence τ:u_(A)→v_(A),where u_(A)is the semisimple category of U-modules with simple objects Ui,i∈I,and v_(A)is the category of V-modules whose objects are finite direct sums of *** particular,the V-modules Viare simple and distinct,and v_(A)is a rigid tensor *** an application,we find a rigid semisimple tensor subcategory of modules for the Virasoro algebra at central charge 13+6p+6p^(-1),p∈Z_(≥2), which is braided tensor equivalent to an abelian 3-cocycle twist of the category of finite-dimensional ***,the Virasoro vertex operator algebra at central charge 13+6p+6p^(-1)is the PSL_(2)(C)-fixed-point subalgebra of a simple conformal vertex algebra w(-p),analogous to the realization of the Virasoro vertex operator algebra at central charge 13-6p-6p^(-1)as the PSL_(2)(C)-fixed-point subalgebra of the triplet algebra W(p).

关键词： vertex operator algebras coset conformal eld theory braid-reversed tensor equivalence Virasoro algebra

Determination of Physical, Mechanical and Fire Retardancy Properties of Innovative Particleboard Made from Corn Stalk (Zea mays L.) Particles

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Journal of Renewable Materials 2024年第10期12卷 1729-1756页

作者： Lilik Astari Benoit Belleville Kenji Umemura Alex Filkov Barbara Ozarska robert h.Crawford School of Agriculture Food and Ecosystem SciencesThe University of MelbourneMelbourne3121Australia Research Center for Biomass and Bioproducts National Research and Innovation AgencyBogor16911Indonesia Research Institute of Sustainable humanosphere Kyoto UniversityKyoto611-0011Japan School of Agriculture Food and Ecosystem SciencesThe University of MelbourneCreswick3363Australia Faculty of Architecture Building and PlanningThe University of MelbourneMelbourne3010Australia

The demand for particleboard is increasing along with economic and population ***,two major barriers to the manufacture of particleboard are a shortage of raw materials(woodchips)and the emission of formaldehyde from conventional *** by-products such as corn stalks contain an abundance of renewable lignocellulosic *** study evaluates the effect of citric acid as a natural adhesive and fire retardant addition on the physical,mechanical,and fire retardancy properties of particleboards fabricated from corn stalks.A cost-effective and inorganic salt,calcium carbonate,was tested to enhance the fire *** dihydrogen phosphate was also considered as a comparative *** with the addition of calcium carbonate was pretreated with sodium *** particleboards were pressed for 10 min at 200℃.Japanese Industrial Standard JIS A 5908:2022 was used as the benchmark for the physical and mechanical *** retardancy was dynamically tested by simulating a Bushfire Attack Level of 19 kW/m^(2).The particleboard with 25 wt%citric acid had superior mechanical properties and complied with the JIS A 5908 standard for Type 13 base par*** with the addition of calcium carbonate(5%and 10%)showed significantly delayed pyrolysis time.

关键词： Particleboard corn stalk ﬁre retardancy citric acid mechanical properties