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Indoor localization for pedestrians with real-time capability using multi-sensor smartphones

Geo-Spatial Information Science 2019年第2期22卷 73-88,I0001页

作者： Catia Real Ehrlich jörg Blankenbach Geodetic Institute and Chair for Computing in Civil Engineering&Geo Information Systems RWTH Aachen UniversityAachenGermany

The localization of persons or objects usually refers to a position determined in a spatial reference ***,this is usually accomplished with Global Navigation Satellite Systems(GNSS).However,the automatic positioning of people in GNSS-free environments,especially inside of buildings(indoors)poses a huge ***,satellite signals are attenuated,shielded or reflected by building components(*** or ceilings).For selected applications,the automatic indoor positioning is possible based on different technologies(***,RFID,or UWB).However,a standard solution is still not *** indoor positioning systems are only suitable for specific applications or are deployed under certain conditions,*** infrastructures or sensor ***,as popular cost-effective multi-sensor systems,is a promising indoor localization platform for the mass-market and is increasingly coming into ***’s devices are equipped with a variety of sensors that can be used for indoor *** this contribution,an approach to smartphone-based pedestrian indoor localization is *** novelty of this approach refers to a holistic,real-time pedestrian localization inside of buildings based on multisensor smartphones and easy-to-install local positioning *** this purpose,the barometric altitude is estimated in order to derive the floor on which the user is *** 2D position is determined subsequently using the principle of pedestrian dead reckoning based on user's movements extracted from the smartphone *** order to minimize the strong error accumulation in the localization caused by various sensor errors,additional information is integrated into the position *** building model is used to identify permissible(***,passageways)and impermissible(***)building areas for the *** technologies contributing to higher precision and robustness are also *** the fusion of diffe

关键词： Indoor positioning MEMS recursive Bayesian estimation particle filter sensor fusion Bluetooth beacons WLAN fingerprinting magnetic anomalies

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Three-dimensional CityGML building models in mobile augmented reality: a smartphone-based pose tracking system

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International journal of Digital Earth 2021年第1期14卷 32-51页

作者： Christoph Blut jörg Blankenbach Geodetic Institute Department of Computing in Civil Engineering and Geo-Information SystemsRWTH Aachen UniversityAachenGermany

Many augmented reality(AR)systems are developed for entertainment,but AR and particularly mobile AR potentially have more application possibilities in other *** example,in civil engineering or city planning,AR could be used in combination with CityGML building models to enhance some typical workflows in planning,execution and operation processes.A concrete example is the geo-referenced on-site visualization of planned buildings or building parts,to simplify planning processes and optimize the communication between the participating *** of the main challenges for the visualization lies in the pose tracking,*** real-time estimation of the translation and rotation of the mobile device to align the virtual objects with *** this paper,we introduce a proof-of-concept fine-grained mobile AR CityGML-based pose tracking system aimed at the mentioned *** system estimates poses by combining 3D CityGML data with information derived from 2D camera images and an inertial measurement unit and is fully self-sufficient and operates without external *** results of our evaluation show that CityGML and low-cost off-the-shelf mobile devices,such as smartphones,already provide performant and accurate mobile pose tracking for AR in civil engineering and city planning.

关键词： Mobile augmented reality pose tracking CityGML 3D city model Android smartphone

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Enhancing the OGC WPS interface with GeoPipes support for real-time geoprocessing

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International journal of Digital Earth 2018年第1期11卷 48-63页

作者： Stefan Herle jörg Blankenbach Geodetic Institute and Chair for Computing in Civil Engineering and Geo Information Systems RWTH Aachen UniversityAachenGermany

Real-time geospatial information is used in various applications such as risk management or alerting ***,the rise of new sensing technologies also increases the demand for processing the data in real ***’s spatial data infrastructures,however,do not meet the requirements for real-time *** OpenGIS®Web Processing Service(WPS)is not designed to process real-time *** has some major drawbacks in asynchronous processing and cannot handle(geo)data streams out of the *** previous papers,we introduced the GeoPipes approach to share spatiotemporal data in real *** implemented the concept extending the Message Queue and Telemetry Transport(MQTT)protocol by a spatial and temporal dimension,which we call *** this paper,we demonstrate the integration of the GeoPipes idea in the WPS interface to expose standardized real-time geoprocessing *** proof of the concept is illustrated in some exemplary real-time geo processes.

关键词： Real-time geoprocessing web processing service sensor web Internet-ofthings GeoPipes

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Large eddy simulations of a turbulent mixing layer periodically excited with fundamental and third harmonic frequency

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Chinese journal of Aeronautics 2023年第5期36卷 33-40页

作者： jörg SCHLÜTER Dan ZHAO Abhishek SARKAR School of Engineering Deakin UniversityWaurn Ponds 3216Australia College of Engineering University of CanterburyChristchurch 8041New Zealand School of Mechanical and Aerospace Engineering Nanyang Technological UniversitySingapore

A better understanding of the mixing behavior of excited turbulent mixing layers is critical to a number of aerospace *** studies of excited turbulent mixing layers focused on single frequency excitation or the excitation with fundamental and its second harmonic *** is a lack of detailed studies on applying low and higher frequency *** this study,we have performed large-eddy simulations of periodically excited turbulent mixing *** excitation consists of a fundamental frequency and its third *** have used phase-averaging to identify the vortex structure and strength in the mixing layer,and we have studied the vortex *** different vortex paring mechanisms are observed depending on the phase shift between the two excitation *** influence of these two mechanisms on the mixing of a passive scalar is also *** is found that exciting the mixing layer with these low and high frequencies has initially an adverse influence on the mixing process;however,it improves the mixing further downstream of the splitter plate with the excitation using a phase shift ofΔφ=πshowing the best mixing *** present works shed lights on the fundamental vortex dynamics,and has great potential for aeronautical,automotive and combustion engineering applications.

关键词： Flow control Flow excitation Large eddy simulations Turbulent mixing layer Vortex dynamics

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Gene therapy for spinal muscular atrophy:perspectives on the possibility of optimizing SMN1 delivery to correct all neurological and systemic perturbations

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Neural Regeneration Research 2025年第7期20卷 2011-2012页

作者： Sharon j.Brown Rafael j.Yáñez-Muñoz Heidi R.Fuller School of Pharmacy and Bioengineering Keele UniversityKeeleUK Wolfson Center for Inherited Neuromuscular Disease TORCH BuildingRJAH Orthopaedic HospitalOswestryUK *** Center of Gene and Cell TherapyDepartment of Biological SciencesSchool of Life Sciences and the EnvironmentRoyal Holloway University of LondonEghamUK

Spinal muscular atrophy(SMA)is a genetic condition that results in selective lower motor neuron loss with concomitant muscle weakness and *** genetic cause of SMA was understood in 1995 when loss or impairment of the survival motor neuron 1(SMN1)gene was identified as the main contributing factor(Lefebvre et al.,1995).This,in combination with the discovery that humans have a“back-up”gene,SMN2,which can produce low levels(approximately 10%)of the full-length functional SMN protein,has led to the generation of SMA-specific gene *** was traditionally classified according to age of symptom onset and developmental milestones achieved,with life expectancy and severity varying between ***,SMN2 copy number is used as a proxy for the prediction of disease severity,with higher SMN2 copy number typically being associated with reduced severity of SMA,although this relationship is not absolute:some individuals with low SMN2 copy number have less severe SMA phenotypes and vice ***,the etiology of SMA is further complicated by other factors,such as non-typical nucleotide variants and SMN2-independent modifiers of disease severity.

关键词： atrophy traditionally absolute

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Versatile guardians: regenerative regulatory T cells in Parkinson’s disease rodent models

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Signal Transduction and Targeted Therapy 2023年第12期8卷 5578-5580页

作者： Chi Wang Ip jörg Wischhusen Department of Neurology University Hospital of WürzburgWürzburgGermany Section for Experimental Tumor Immunology Department of Obstetrics and GynecologyUniversity Hospital of WürzburgWürzburgGermany

In a paper published in Nature,Park and colleagues have explored an innovative approach for improving adoptive neuron transfer,with possible implications for Parkinson´s Disease(PD)and other neurodegenerative diseases.1 By co-transplanting autologous regulatory T(Treg)cells,they managed to reduce surgical trauma-induced neuroinflammation,enhance the safety of cell replacement therapy by inhibiting proliferation of non-dopaminergic cells and improve therapeutic outcomes.

关键词： inflammation inhibiting trauma

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Wetting and its influence on the filtration ability of ceramic foam filters

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Particuology 2015年第1期13卷 50-57页

作者： Fabian Heuzeroth j?rg Fritzsche Urs A.Peuker Institute of Mechanical Process Engineering and Mineral Processing

Deep bed filtration in aqueous media is a well-known process for solid-liquid separation. However, the use of deep bed filtration for the purification of metal melts is a relatively new field of application, In particular, the separation mechanism of metal melts filtration is a new area for investigation. The current paper aims at examining the influence of wetting on the filtration efficiency of ceramic foam filters that is an important feature of the metal melts filtration process. A model system was designed using water and alumina particles （〈200μm）. The particles and filter medium were coated to model poor wetting. Thus, examination of the influence of wetting on the adhesion energy and filtration performance was possible. Furthermore, the effect of fluid velocity was studied. To this end, the experiments were carried out under atmospheric conditions and at 20℃. The findings showed that poor wetting between the fluid and solid phase significantly increased the filtration efficiency.

关键词： Deep bed filtration Adhesion energy Atomic force microscopy Wetting

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From Single Droplet to Column Design

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Tsinghua Science and Technology 2006年第2期11卷 212-216页

作者： Hans-jrg Bart Institute of Thermal Process Engineering TU Kaiserslautern D-67653 Kaiserslautern Germany

The technique state to design counter-current extraction columns is based on the performance of pilot plant experiments. The modelling is then either with the equilibrium or dispersion model, whereas in the latter the dispersion coefficient accounts for all hydrodynamic non-idealities. A new approach uses single droplet experiments to obtain the basic laws and functions governing droplet breakage, coalescence, relative velocity, and axial dispersion when using droplet populance balance models （DPBM）. The hydrodynamics simulation results show that the mean Sauter diameter, hold-up, and concentration profiles could be well predicted, which promotes the use of DPBM models for further applications in industrial scale.

关键词： single droplet column design countercurrent extraction droplet populance balance model

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Tailored surface textures to increase friction-A review

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Friction 2022年第9期10卷 1285-1304页

作者： Henara L.COSTA jörg SCHILLE Andreas ROSENKRANZ School of Engineering Surface Engineering GroupUniversidade Federal do Rio GrandeRio Grande 96203900Brazil University of Applied Sciences Mittweida Laserinstitut Hochschule Mittweida 09648Germany Department of Chemical Engineering Biotechnology and MaterialsUniversity of ChileSantiago 8370459Chile

Surface textures with micro-scale feature dimensions still hold great potential to enhance the frictional performance of tribological *** from the ability of surface texturing to reduce friction,surface textures can also be used to intentionally increase friction in various applications that rely on friction for their adequate ***,this review aims at presenting the state-of-the-art regarding textured surfaces for high-friction *** a brief general introduction,the recent trends and future paths in laser surface texturing are ***,the potential of surface textures to increase friction in different applications including adhesion,movement transmission and control,biomimetic applications,and road-tire contacts is critically *** emphasis in this section is laid on the involved mechanisms responsible for friction ***,current short-comings and future research directions are pointed out thus emphasizing the great potential of(laser-based)surface texturing methods for innovations in modern surface engineering.

关键词： surface texturing tribology laser processing friction increase

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Multimodal nonlinear endomicroscopic imaging probe using a double-core double-clad fiber and focus-combining micro-optical concept

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Light(Science & Applications) 2021年第11期10卷 2173-2183页

作者： Ekaterina Pshenay-Severin Hyeonsoo Bae Karl Reichwald Gregor Matz jörg Bierlich jens Kobelke Adrian Lorenz Anka Schwuchow Tobias meyer-Zedler Michael Schmitt Bernhard Messerschmidt juergen Popp GRINTECH GmbH Schillerstr.107745JenaGermany Leibniz Institute of Photonic Technology Member of Leibniz Health TechnologiesAlbert-Einstein-Str.907745JenaGermany Institute of Physical Chemistry and Abbe Center of Photonics Friedrich Schiller University JenaHelmholtzweg 407743JenaGermany

Multimodal non-linear microscopy combining coherent anti-Stokes Raman scattering,second harmonic generation,and two-photon excited fluorescence has proved to be a versatile and powerful tool enabling the label-free investigation of tissue structure,molecular composition,and correlation with function and disease *** a routine medical application,the implementation of this approach into an in vivo imaging endoscope is ***,this is a difficult task due to the requirements of a multicolour ultrashort laser delivery from a compact and robust laser source through a fiber with low losses and temporal synchronization,the efficient signal collection in epi-direction,the need for small-diameter but highly corrected endomicroobjectives of high numerical aperture and compact ***,we introduce an ultra-compact fiber-scanning endoscope platform for multimodal non-linear endomicroscopy in combination with a compact four-wave mixing based fiber *** heart of this fiber-scanning endoscope is an in-house custom-designed,single mode,double clad,double core pure silica fiber in combination with a 2.4 mm diameter NIR-dual-waveband corrected endomicroscopic objective of 0.55 numerical aperture and 180µm field of view for non-linear imaging,allowing a background free,low-loss,high peak power laser delivery,and an efficient signal collection in backward direction.A linear diffractive optical grating overlays pump and Stokes laser foci across the full field of view,such that diffraction-limited performance is demonstrated for tissue imaging at one frame per second with sub-micron spatial resolution and at a high transmission of 65%from the laser to the specimen using a distal resonant fiber scanner.

关键词： fiber double scanner

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