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Design of face-hobbed spiral bevel gears with reduced maximum tooth contact pressure and transmission errors

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Chinese Journal of Aeronautics 2013年第3期26卷 777-790页

作者： Vilmos simon Budapest University of Technology and Economics Faculty of Mechanical Engineering Department for Machine Design

The aim of this study is to define optimal tooth modifications, introduced by appropriately chosen head-cutter geometry and machine tool setting, to simultaneously minimize tooth contact pressure and angular displacement error of the driven gear （transmission error） of face-hobbed spiral bevel gears. As a result of these modifications, the gear pair becomes mismatched, and a point contact replaces the theoretical line contact. In the applied loaded tooth contact analysis it is assumed that the point contact under load is spreading over a surface along the whole or part of the ‘‘potential’’ contact line. A computer program was developed to implement the formulation provided above. By using this program the influence of tooth modifications introduced by the variation in machine tool settings and in head cutter data on load and pressure distributions, transmission errors, and fillet stresses is investigated and discussed. The correlation between the ease-off obtained by pinion tooth modifications and the corresponding tooth contact pressure distribution is investigated and the obtained results are presented.

关键词： Ease-off Face-hobbed spiral bevel gears Load distribution Transmission errors Gear teeth

Looking into the future of Nanoelectronics in the Diversification Efficient Era

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Science China(Information Sciences) 2016年第6期59卷 6-19页

作者： simon DELEONIBUS Universit′es Grenoble Alpes CEA LETIMINATEC Campus

The linear scaling of CMOS has encountered, since its beginning, many hurdles which request new process modules, driven mainly by the maximization of energy efficiency. Fabrication at the sub 10 nm node level will request Intrinsic Variability approaching to zero. The rapid growth of mobile, multifunctional and autonomous systems is hardly demanding to reach Zero Power consumption. The solutions to integrate Thin Film based devices, architectures and systems in order to face these challenges are described.

关键词： CMOS thin films heterogeneous integration NEMS 3D integration sequential parallel zero intrinsic variability zero power systems

Some remarks and problems on complex homogeneous domains Dedicated to Professor Sheng GONG on the occasion of his 75th birthday

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Science China Mathematics 2006年第11期49卷 1655-1661页

作者： GINDIKIN simon Department of Mathematics Hill Center Rutgers University110 Frelinghysen RoadPiscatawayNJ 088548019USA

We discuss some problems on rigidity of canonical realizations of complex homogeneous domains at Cn

关键词： complex homogeneous domain, Siegel domain, Cartan domain, homogeneous cone, tube domain, Cauchy kernel.

LIOUVILLE TYPE THEOREM FOR THE STATIONARY EQUATIONS OF MAGNETO-HYDRODYNAMICS

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Acta Mathematica Scientia 2019年第2期39卷 491-497页

作者： simon SCHULZ Mathematical Institute University of Oxford

We show that any smooth solution(u, H) to the stationary equations of magnetohydrodynamics belonging to both spaces L^6(R^3) and BMO^(-1)(R^3) must be identically *** is an extension of previous results, all of which systematically required stronger integrability and the additional assumption ▽u, ▽H∈L^2(R^3), i.e., finite Dirichlet integral.

关键词： Liouville theorem Caccioppoli inequality Navier-Stokes equations MHD

The Quantum Consistency of the Ten-Dimensional Heterotic String Effective Action

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Communications in Theoretical Physics 2011年第5期55卷 857-862页

作者： simon Davis Research Foundation of Southern California

The finiteness of superstring theory at each order in perturbation theory is considered with respect to the ten-dimensional effective action. The quantum consistency of the ten-dimensional superstring effective action is confirmed with an analysis of the perturbative expansion of the quartic sector. It is found to be compatible with the finiteness of reduced four-dimensional theory. Furthermore, implications for the validity of superstring perturbation theory at lower energies is considered.

关键词： effective action gauge potential renormalizability

Integrated optical-readout of a high-Q mechanical out-of-plane mode

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Light(Science & Applications) 2022年第10期11卷 2485-2491页

作者： Jingkun Guo simon Groblacher Kavli Institute of Nanoscience Department of Quantum NanoscienceDelft University of Technology2628CJ DelftThe Netherlands

The rapid development of high-QM macroscopic mechanical resonators has enabled great advances in *** improvements could allow for quantum-limited or quantum-enhanced applications at ambient *** of the remaining challenges include the integration of high-QM structures on a chip,while simultaneously achieving large coupling strengths through an optical ***,we present a versatile fabrication method,which allows us to build fully integrated optomechanical *** place a photonic crystal cavity directly above a mechanical resonator with high-QM fundamental out-of-plane mode,separated by a small *** highly confined optical field has a large overlap with the mechanical mode,enabling strong optomechanical interaction ***,we implement a novel photonic crystal design,which allows for a very large cavity photon number,a highly important feature for optomechanical experiments and sensor *** versatile approach is not limited to our particular design but allows for integrating an out-of-plane optical read-out into almost any device ***,it can be scaled to large arrays and paves the way to realizing quantum experiments and applications with mechanical resonators based on high-QM out-of-plane modes alike.

关键词： optical resonator mode

Arsenobetaine and thio-arsenic species in marine macroalgae and herbivorous animals: Accumulated through trophic transfer or produced in situ?

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Journal of Environmental Sciences 2016年第11期28卷 131-139页

作者： simon Foster William Maher Ecochemistry Laboratory Institute for Applied Ecology University of Canberra

Arsenobetaine（AB） and thio-arsenoribosides were measured in common macroalgae species（8 phaeophyta, 4 rhodophyta and 2 chlorphyta）, along the Australian south east coast line. As well, arsenic species profiles were measured for two common marine herbivores, the sea urchin Centrostephanus rodgersii and the fish Odax cyanomelas that graze on these macroalgae to understand if trophic transfer of these species would account for their presence in marine herbivores. AB was found in seven of the fourteen macroalgae species investigated but does not contributed significantly to any of the macroalgae arsenic content（0.01-1.2 μg/g）. AB was found in only two of the brown macroalgae and all the red and green macroalgae（with the exception of Corallina officinalis）. Thio-arsenic species were found sporadically, but not in high concentrations in any of the macroalgae *** present in macroalgae is likely to be associated with epiphytic organisms while thio-arsenoribosides are likely to be produced by decaying parts of damaged macroalgae.A laboratory feeding experiment in which the herbivorous gastropod, Austrocochlea constricta, was fed macroalgae containing thio-arsenoribosides for a 24 hr period every three days showed that these are readily accumulated over a short period. Thio-arsenoribosides in herbivores are therefore probably obtained through trophic transfer. Some AB is also obtained through trophic transfer; however, the presence of trimethylated arsonioribosides,a hypothesized precursor of AB formation in herbivores, suggests that some AB is produced within herbivores from the transformation of arsenoribosides accumulated from their diet.

关键词： Arsenobetaine Arsenic Metabolism Thio-arsenosugars Macroalgae Gastropods

Strong MXene-bridged graphene sheets for compact energy storage

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Science Bulletin 2024年第19期69卷 2959-2960页

作者： Patrice simon UniversitéToulouse III Paul Sabatier Laboratoire CIRIMAT(UMR CNRS 5085)Toulouse 31062France

High volumetric energy density energy storage devices are needed for many applications ranging from miniaturized electronics to electric vehicles[1,2].Two-dimensional(2D)nanosheets,such as graphene,MoS2,and MXene are great candidates for assembling compact sheets[1–5],as their horizontal stacking can achieve interlayer distances close to the diameter of electrolyte ions[1,6].The electrolyte ions confined between interlayers of those materials significantly improve the pore and porous volume utilization,thus achieving compact energy storage realized by ion desolvation[1].

关键词： MXene graphene energy

Holomorphic Factorization of Superstring Scattering Amplitudes

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Communications in Theoretical Physics 2011年第1期55卷 1-5页

作者： simon Davis Research Foundation of Southern Califoria

The holomorphic factorization of the superstring partition function is verified at arbitrary genus. The evaluation of scattering amplitudes and the implications of genus-dependent estimates on the string coupling are ... 详细信息

关键词： holomorphic factorization Ramond measure supermoduli space coordinate