检索结果-南通市图书馆

Automatic route planning for gPS art generation

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Computational Visual Media 2019年第3期5卷 303-310页

作者： andre Waschk Jens Krüger University of Duisburg-Essen

In this paper, we present a novel approach to automated route generation of global positioning system(gPS) artwork. The term gPS artwork describes the generation of drawings by leaving virtual traces on digital maps. Until now, the creation of these images has required a manual planning phase in which an artist designs the route by hand. Once the route for this artwork has been planned, gPS devices have been used to track the movement. Using our solution, the lengthy planning phase can be significantly shortened,thereby opening art creation to a broader public.

关键词： gPS art walking routing shape detection navigation

Various phases in surface movements linked to deep coal longwall mining:from start-up till the period after closure

在线全文

学校读者我要写书评

暂无评论

International Journal of Coal Science & Technology 2021年第3期8卷 412-426页

作者： andre Vervoort Department of Civil Engineering KU LeuvenLeuvenBelgium

This paper covers the entire lifetime of an underground coal mine,including the start-up of the mining operations and the period after the closure and sealing of the underground *** of the vertical surface movement are presented for three neighbouring mines in the Belgian Campine coal basin,where the longwall mining method was ***,the monitoring of the initial phase showed that the impact of the first panel was smaller than the impacts of the following two neighbouring *** the second panel was mined,a change in the induced surface tilt was observed in the immediate proximity of the ***,data for a transect with a length of about 2.5 km were presented,covering a total time of 54 years,of which the first 31 years were during the active life of the *** subsidence rates of up to-0.3 m/year were *** the mine was closed and the pumping facilities were stopped,the average uplift rate was situated mostly between 4 and 16 mm/year,but a value of 141 mm/year also was *** years after closure,the upward movements are still ***,the phase of uplift is analyzed in more detail over a full north–south transect.A clear narrow maximum was observed for the uplift,corresponding to a total vertical movement of 0.2 m over approximately an 18-year *** these phases are relevant,for example when analysing damage to buildings and *** becomes visible when the cumulative movement and loading exceed critical limits and not necessarily when the largest rate of movement is observed,for example.

关键词： Longwall ground control Subsidence Uplift Surface movement Radar-interferometry

Wave propagation through disordered media without backscattering and intensity variations

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Light(Science & Applications) 2017年第1期6卷 623-629页

作者： Konstantinos g Makris andre Brandstötter Philipp Ambichl Ziad H Musslimani Stefan Rotter Crete Center for Quantum Complexity and Nanotechnology Department of PhysicsUniversity of CreteHeraklion 71003Greece Institute for Theoretical Physics Vienna University of Technology(TU-Wien)Vienna 1040Austria Department of Mathematics Florida State UniversityTallahasseeFL 32306USA

A fundamental manifestation of wave scattering in a disordered medium is the highly complex intensity pattern the waves acquire due to multi-path *** we show that these intensity variations can be entirely suppressed by adding disorder-specific gain and loss components to the *** resulting constant-intensity waves in such non-Hermitian scattering landscapes are free of any backscattering and feature perfect transmission through the *** experimental demonstration of these unique wave states is envisioned based on spatially modulated pump beams that can flexibly control the gain and loss components in an active medium.

关键词： Anderson localisation complex media non-Hermitian physics scattering

EDT Method for Multiple Labelled Objects Subject to Tied Distances

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

International Journal of Automation and computing 2021年第3期18卷 468-479页

作者： andre Marasca andre Backes Fabio Favarim Marcelo Teixeira Dalcimar Casanova Federal University of Technology−Parana Pato Branco 85503-390Brazil Federal University of Uberlandia Uberlandia 38400-902Brazil

The success of new scientific areas can be assessed by their potential for contributing to new theoretical approaches aligned with real-world *** Euclidean distance transform(EDT)has fared well in both cases,providing a sound theoretical basis for a number of applications,such as median axis transform,fractal analysis,skeletonization,and Voronoi *** its wide applicability,the discrete form of the EDT includes interesting properties that have not yet been fully exploited in the *** this paper,we are particularly interested in the properties of 1)working with multiple objects/labels;and 2)identifying and counting equidistant pixels/voxels from certain points of *** some domains(such as dataset classification,texture,and complexity analysis),the result of applying the EDT transform with different objects,and their respective tied distances,may compromise the *** this sense,we propose an efficient modification in the method presented in[1],which leads to a novel approach for computing the distance transform in a space with multiple objects,and for counting equidistant pixels/voxels.

关键词： Euclidean distance transform(EDT) multiple-labelled objects tied distances fractal analysis texture analysis

Two-Phase Flow Patterns and Heat Transfer in Parallel Microchannels

在线全文

学校读者我要写书评

暂无评论

Journal of Thermal Science 2002年第4期11卷 353-358页

作者： AlainDegiovanni BenjaminRemy Stephanéandre Department of Mechanical Engineering Technion- Israel Institute of TechnologyDepartment of Mechanical Engineering Technion- Israel Institute of TechnologyDepartment of Mechanical Engineering Technion- Israel Institute of Technology

MicroChannel heat sinks with two-phase flow can satisfy the increasing heat removal requirements of modern micro electronic devices. One of the important aspects associated with two- phase flows in microchannels is to study the bubble behavior. However, in the literature most of the reports present data of only a single channel. This does not account for flow mixing and hydrodynamic instability that occurs in parallel microchannels, connected by common inlet and outlet collectors. In the present study, experiments were performed for air- water and steam- water flow in parallel triangular microchannels with a base of 200-300μ m. The experimental study is based on systematic measurements of temperature and flow pattern by infrared radiometry and high-speed digital video imaging. In air-water flow, different flow patterns were observed simultaneously in the various microchannels at a fixed values of water and gas flow rates. In steam-water flow, instability in uniformly heated microchannels was observed.

关键词： two-phase flow heat transfer microchannels dryout.

Movement Primitives as a Robotic Tool to Interpret Trajectories Through Learning-by-doing

在线全文

学校读者我要写书评

暂无评论

International Journal of Automation and computing 2013年第5期10卷 375-386页

作者： andrea Soltoggio andre Lemme Research Institute for Cognition and Robotics Bielefeld University

Articulated movements are fundamental in many human and robotic *** humans can learn and generalise arbitrarily long sequences of movements,and particularly can optimise them to ft the constraints and features of their body,robots are often programmed to execute point-to-point precise but fxed *** study proposes a new approach to interpreting and reproducing articulated and complex trajectories as a set of known robot-based *** of achieving accurate reproductions,the proposed approach aims at interpreting data in an agent-centred fashion,according to an agent s primitive *** method improves the accuracy of a reproduction with an incremental process that seeks frst a rough approximation by capturing the most essential features of a demonstrated *** the discrepancy between the demonstrated and reproduced trajectories,the process then proceeds with incremental decompositions and new searches in sub-optimal parts of the *** aim is to achieve an agent-centred interpretation and progressive learning that fts in the frst place the robots capability,as opposed to a data-centred decomposition *** on both geometric and human generated trajectories reveal that the use of own primitives results in remarkable robustness and generalisation properties of the *** particular,because trajectories are understood and abstracted by means of agent-optimised primitives,the method has two main features： 1） Reproduced trajectories are general and represent an abstraction of the data.2） The algorithm is capable of reconstructing highly noisy or corrupted data without pre-processing thanks to an implicit and emergent noise suppression and feature *** study suggests a novel bio-inspired approach to interpreting,learning and reproducing articulated movements and *** applications include drawing,writing,movement generation,object manipulation,and other tasks where the performance

关键词： Movement primitives learning pattern matching trajectory decomposition perception

Distant cousins come to ABP1’s rescue

在线全文

学校读者我要写书评

暂无评论

Science China(Life Sciences) 2024年第1期67卷 219-220页

作者： andre Kuhn Dolf Weijers Laboratory of Biochemistry Wageningen UniversityStippeneng 46708WE Wageningenthe Netherlands

There are few plant processes that are not in one way or another influenced by the auxin signaling *** many roles auxin plays in plants have inspired a range of investigations towards understanding its mechanisms of *** recent years and decades,genetic analysis in the flowering plant Arabidopsis has been immensely successful in bringing a nuclear response mechanism to light(reviewed in Weijers and Wagner,2016).This system,the nuclear auxin pathway(NAP),acts by regulating gene expression,and when its components are mutated,growth and development is strongly disturbed(Weijers and Wagner,2016).

关键词： bringing disturbed Arabidopsis

同方期刊数据库

Inverse elastographic method for analyzing the ocular lens compression test

在线全文

学校读者我要写书评

暂无评论

Journal of Innovative Optical Health Sciences 2017年第6期10卷 89-100页

作者： Matthew A.Reilly andre Cleaver Department of Biomedical Engineering The Ohio State University ColumbusOH 43210USA†Department of Ophthalmology and Visual Science The Ohio State UniversityColumbusOH 43210USA Department of Mechanical Engineering Tufts University MedfordMA 02155USA

The ocular lens stiffens dramatically with age,resulting in a loss of ***,the mechanisn of stiffening remains unknown,at least in part due to dificulties in making reliable measurements of the intrinsic mechanical properties of the *** experiments have employed manual compression testing to evaluate the stiffness of murine lenses which have genotypes pertinent to human lens *** experiments compare the extrinsic stifness of lenses fom the genotype of interest to the wild-type lens in an effort to reach conclusions regarding the cellular or molcular basis of lens ***,these comparisons are con-founded by alterations in lens size and geometry which invariably accompany these genetic ***,we utilize manual lens comprsion to characterize the stifness of a porcine lens and a murine *** inverse elastographic technique was then developed to estimate the intrinsic shear modulus of each lens as well as the elastic modulus of the lens *** results were in good agreement with the previous literature values.

关键词： Presbyopia lens compression lens mechanical properties finite element analysis lens biomechanics

A TRUST-REgION METHOD FOR NONSMOOTH NONCONVEX OPTIMIZATION

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Computational Mathematics 2023年第4期41卷 683-716页

作者： Ziang Chen andre Milzarek Zaiwen Wen Department of Mathematics Duke UniversityUSA School of Data Science(SDS) The Chinese University of Hong KongShenzhenShenzhen Research Institute for Big Data(SRIBD)China Beijing International Center for Mathematical Research Peking UniversityBeijing 100000China

We propose a trust-region type method for a class of nonsmooth nonconvex optimization problems where the objective function is a summation of a(probably nonconvex)smooth function and a(probably nonsmooth)convex *** model function of our trust-region subproblem is always quadratic and the linear term of the model is generated using abstract descent ***,the trust-region subproblems can be easily constructed as well as efficiently solved by cheap and standard *** the accuracy of the model function at the solution of the subproblem is not sufficient,we add a safeguard on the stepsizes for improving the *** a class of functions that can be“truncated”,an additional truncation step is defined and a stepsize modification strategy is *** overall scheme converges globally and we establish fast local convergence under suitable *** particular,using a connection with a smooth Riemannian trust-region method,we prove local quadratic convergence for partly smooth functions under a strict complementary *** numerical results on a family of Ei-optimization problems are reported and demonstrate the eficiency of our approach.

关键词： Trust-region method Nonsmooth composite programs Quadratic model function global and local convergence