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Calibrating a multi-manipulator robotic system (vol 4, pg 20, 1997)

IEEE ROBOTICS & AUTOMATION MAGAZINE 1997年第2期4卷 44-44页

作者： Bonitz, RG Hsia, TC Jet Propulation Laboratory Pasadena CA USA Systems.Control and Robotics Laboratory Department of Electrical and Computer Engineering University of California Davis CA USA

A simple, but effective, method of calibrating a multimanipulator robotic system is introduced. The algorithm uses precisely machined calibration plates which are inexpensive to manufacture and require no measuring instrumentation. The method is tested on a dual-arm system which resulted in an order of magnitude reduction in the pose error. Coordinated dual-arm manipulation experiments are conducted using the calibrated kinematic model to validate the usefulness of the calibration process

关键词： Calibration Robot kinematics Manipulators Robotics and automation Force control End effectors Acoustic measurements Testing Coordinate measuring machines Position measurement

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ELECTROHYDRODYNAMIC TRAVELING-WAVE PUMPING OF HOMOGENEOUS SEMI-INSULATING LIQUIDS

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IEEE TRANSACTIONS ON electrical INSULATION 1989年第5期24卷 807-834页

作者： WASHABAUGH, AP ZAHN, M MELCHER, JR MIT Cambridge MA USA Department of Electrical Engineering and Computer Science Laboratory for Electromagnetic and Electronic Systems Massachusetts Institute of Technology Cambridge MA USA

Charge separation near a liquid/solid interface is explored by the electrohydrodynamic pumping of Freon TF, transformer oil, and silicone oil using high-voltage traveling waves. Liquid head displacement measurements show strong dependences on peak voltage amplitude (1.0-2.5 kV), frequency (0.1-20 Hz), liquid viscosity (0.5-20 cS), and liquid conductivity (10^-13-10^-9 Ω^-1 m ^-1). Reverse pumping, opposite to the traveling wave direction, occurs when the ratio of the voltage to the frequency is small but switches to forward pumping when the ratio is large. The largest measured head was ~7 cm, which can drive an average flow velocity of 18 cm/s. A charge transport analysis coupled to viscosity-dominated flow is used to describe the pumping process. The time-averaged coulombic force on the migrating charge can result in pumping in either direction. In the regime where ion migration dominates charge relaxation, a universal curve for the pumping dependence on traveling-wave voltage and frequency is deduced experimentally and predicted by the model. Measurements of average volume charge density show that undoped liquids have a positive net charge density, whereas additives used to increase the conductivity lead to bipolar injection and an augmentation of the injection as well as the conductivity

关键词： electrical conductivity of liquids electrohydrodynamics insulating oils viscosity of liquids 0.1 to 20 Hz 1.0 to 2.5 kV Freon TF average flow velocity average volume charge density bipolar injection charge relaxation charge transport analysis electrohydrodynamic pumping frequency high-voltage traveling waves homogeneous semi-insulating liquids ion migration liquid conductivity liquid head displacement measurement liquid viscosity liquid/solid interface peak voltage amplitude positive net charge density silicone oil time-averaged coulombic force transformer oil viscosity-dominated flow Conductivity Displacement measurement Electrohydrodynamics Frequency Oil insulation Petroleum Solids Switches Viscosity Voltage

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Evaluation of minor labial salivary gland focus score in Sjögren's disease using deep learning: a tool for more efficient diagnosis and future tissue biomarker discovery

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Journal of Autoimmunity 2025年 153卷 103418-103418页

作者： Panagiotopoulos, Konstantinos N. Tsiknakis, Nikos Zaridis, Dimitrios I. Mavragani, Clio P. Tzioufas, Athanasios G. Fotiadis, Dimitrios I. Goules, Andreas V. Department of Pathophysiology and Joint Rheumatology Medical School National and Kapodistrian University of Athens Greece Computational BioMedicine Laboratory Foundation for Research and Technology Hellas Greece Biomedical Research Institute Foundation for Research and Technology Hellas Greece Biomedical Engineering Laboratory School of Electrical & Computer Engineering National Technical University of Athens Greece Unit of Medical Technology and Intelligent Information Systems Department of Materials Science and Engineering University of Ioannina Greece Department of Physiology Medical School National and Kapodistrian University of Athens Greece Department of Oncology Pathology Karolinska Institute Sweden Biomedical Research Foundation of the Academy of Athens Greece Research Institute for Systemic Autoimmune Diseases Greece

Background: Sjögren's Disease (SjD) is histopathologically characterized by focal sialadenitis in minor labial salivary gland biopsies (mLSGB), which is evaluated by utilizing the focus score (FS). Focus score ≥1 identification is a critical step of the diagnostic approach and SjD classification. Nonetheless, during mLSGB analysis, FS reporting is neglected in a staggering 17 %, and a degree of inter-observer variability is introduced, even among specialized university centers. As the unmet need for reliable FS reporting is displayed, leveraging artificial intelligence in mLSGB evaluation shows encouraging potential and mandates to be investigated. Methods: Minor LSGBs stained only with hematoxylin and eosin (H&E) during evaluation of individuals with a clinical suspicion of SjD, were randomly chosen from our archive. All mLSGBs were scanned digitally as whole slide images (WSI) and the final dataset was partitioned into a training (70 %) and a test set (30 %). An attention-based deep learning binary classification model was employed for evaluation of mLSGBs positivity (FS ≥ 1 or FS < 1). Results: The final dataset consisted of 271 mLSGBs, with 153 (56 %) having FS < 1 and 118 (44 %) FS ≥ 1. In the FS ≥ 1 subset, 74 (63 %) were in the FS = 1–2 range, and the remaining biopsies had FS > 2, following the expected FS distribution among the typical SjD population. Our model resulted in: AUC = 0.932 (0.881–0.984), sensitivity 87 % (0.733–0.944), specificity 84 % (0.71–0.915) and accuracy 85.2 % (0.763–0.912), achieving better performance from previous works. Conclusion: Artificial intelligence models may overcome the intra-observer biases and inter-observer variability in FS evaluation, reinforcing the diagnosis and biomarker discovery in SjD. © 2025 Elsevier Ltd

关键词： Artificial intelligence Deep learning Focus score Lip biopsy Rheumatology Sjogren syndrome Sjögren's disease

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HIGH-SPEED GAAS/ALGAAS OPTOELECTRONIC DEVICES FOR computer-APPLICATIONS

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IBM JOURNAL OF RESEARCH AND DEVELOPMENT 1990年第4期34卷 568-584页

作者： HARDER, CS VANZEGHBROECK, BJ KESLER, MP MEIER, HP VETTIGER, P WEBB, DJ WOLF, P IBM Research Division Zurich Research Laboratory Ruschlikon Switzerland Department of Electrical and Computer Engineering and the Optoelectronic Computing Systems Center University of Colorado Colorado

We present an overview, mainly of work in our laboratory, of low-threshold GaAs/AlGaAs quantum-well laser diodes and GaAs metal-semiconductor-metal photodetectors—two optoelectronic devices which show good promise for use in computer-related communication. Present-day telecommunication device technology (based on InP materials) is not well suited to the requirements of optical data communication among and within computers because the computer environment is much more demanding. It imposes a higher ambient temperature on the devices, and requires denser packaging and smaller power dissipation per device, as well as a high degree of parallelism. The GaAs/AlGaAs device technology is ideally suited to this task because of the possibility of integration of arrays of high-speed, low-threshold laser diodes and high-speed photodetectors with high-performance electronic circuits.

关键词： Optoelectronic Devices

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SecBCS: a secure and privacy-preserving blockchain-based crowdsourcing system

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Science China(Information Sciences) 2020年第3期63卷 20-33页

作者： Chao LIN Debiao HE Sherali ZEADALLY Neeraj KUMAR Kim-Kwang Raymond CHOO Key Laboratory of Aerospace Information Security and Trusted Computing Ministry of EducationSchool of Cyber Science and Engineering Wuhan University State Key Laboratory of Cryptology College of Communication and Information University of Kentucky Department of Computer Science and Engineering Thapar University Department of Information Systems and Cyber Security and Department of Electrical and Computer Engineering University of Texas at San Antonio

A robust and scalable crowd management infrastructure is crucial in addressing operational challenges when deploying high-density sensors and actuators in a smart city. While crowdsourcing is widely used in crowd management, conventional solutions, such as Upwork and Amazon Mechanical Turk, generally depend on a trusted third-party platform. There exist several potential security concerns(e.g., sensitive leakage, single point of failure and unfair judgment) in such a centralized paradigm. Hence, a recent trend in crowdsourcing is to leverage blockchain(a decentralized ledger technology) to address some of the existing limitations. A small number of blockchain-based crowdsourcing systems(BCSs) with incentive mechanisms have been proposed in the literature, but they are generally not designed with security in mind. Thus, we study the security and privacy requirements of a secure BCS and propose a concrete solution(i.e., SecBCS)with a prototype implementation based on JUICE.

关键词： crowdsourcing blockchain secure privacy-preserving smart contract

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Sporadic metal layers in the upper mesosphere

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FARADAY DISCUSSIONS 1995年第 1 期100卷 431-439页

作者： Gardner, CS Department of Electrical and Computer Engineering University of Illinois at Urbana-Champaign 315 Computer and Systems Research Laboratory Urbana IL 61801 1308 West Main Street United States

One of the most interesting current problems in the aeronomy of the mesosphere is the origin of sporadic Na (Na-s) and sporadic Fe (Fe-s) layers. These are very thin (ca. 1 km), dense layers of atomic Na and Fe which often form explosively in a matter of minutes, may extend horizontally for several thousand kilometres, persist for several hours, and then disappear rapidly. While the typical concentrations of atomic Na and Fe in the upper mesosphere are respectively, 4 x 10(3) and 10(4) cm(-3), maximum densities exceeding 10(5) cm(-3) have been observed for both species during sporadic layer events. Incoherent scatter radar and lidar observations at Arecibo have shown conclusively that many Na-s layers are linked to the formation of sporadic E (E(s)) layers, while rocket and lidar observations at Andoya have shown a similar link between Fe-s and E(s). Recent lidar observations at Urbana and Hawaii have revealed the simultaneous formation of Na-s, Fe-s, and Ca+ layers and the occurrence of substantial temperature enhancements and wind shears during some Na-s events. We present new observations of Na-s obtained with a Na wind/temperature (W/T) lidar during the recent ALOHA-93 (1993 airborne lidar and observations of the Hawaiian airglow) Campaign in Hawaii. These observations are used to characterize the wind and temperature structure associated with several of the major Na-s events observed during ALOHA-93.

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Secure Communication in Dynamic RDARS-Driven systems

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IEEE Wireless Communications Letters 2025年

作者： Pei, Ziqian Wang, Jintao Zhang, Pingping Shi, Zheng Yang, Guanghua Ma, Shaodan University of Macau Department of Electrical and Computer Engineering State Key Laboratory of Internet of Things for Smart City Macau 999078 Macao Jinan University School of Intelligent Systems Science and Engineering Zhuhai 519070 China

In this letter, we investigate a dynamic reconfigurable distributed antenna and reflection surface (RDARS)-driven secure communication system, where the working mode of the RDARS can be flexibly configured. We aim to maximize the secrecy rate by jointly designing the active beamforming vectors, reflection coefficients, and the channel-aware mode selection matrix. To address the non-convex binary and cardinality constraints introduced by dynamic mode selection, we propose an efficient alternating optimization (AO) framework that employs penalty-based fractional programming (FP) and successive convex approximation (SCA) transformations. Simulation results demonstrate the potential of RDARS in enhancing the secrecy rate and show its superiority compared to existing reflection surface-based schemes. © 2012 IEEE.

关键词： Physical-layer security reconfigurable distributed antenna and reflecting surface (RDARS) reconfigurable intelligent surface (RIS) secure communication

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BOUNDARY-VALUE PROBLEMS IN ELECTROFLUIDIZED AND MAGNETICALLY STABILIZED BEDS

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CHEMICAL engineering COMMUNICATIONS 1988年第1期67卷 181-204页

作者： MOISSIS, AA ZAHN, M High Voltage Research Laboratory Laboratory for Electromagnetic and Electronic Systems Department of Electrical Engineering and Computer Science Massachusetts Institute of Technology Cambridge Massachusetts 02139

The stress balance boundary condition at the free surface of a one dimensional electrofluidized or magnetically stabilized bed is reviewed. Conditions for zero interfacial force balance at the top of the bed are investigated. For the case of a uniformly fluidized bed, it is shown that a nonzero particle collision pressure is necessary for a force free bed surface. For the case where the collision pressure is neglected, it is shown that the electrofluidized or magnetically stabilized bed must be nonuniform at equilibrium. Stability criteria for a semi-infinite bed show that a critical field strength is necessary for stabilization. Below this critical condition the bed is convectively unstable. The temporal and spatial responses of a stabilized bed to small signal variations in superficial gas velocity, electrode position, and applied potential are calculated. Specific attention is directed to sinusoidal time variations in superficial gas velocity, where at low frequencies a standing wave character results for the fluidized bed variables.

关键词： Electrofluidization Magnetically stabilized beds Fiuidization Stabilization Boundary value problems.

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Optics for terawatt-scale photovoltaics: review and perspectives

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Advances in Optics and Photonics 2025年第1期17卷 185-294页

作者： Jäger, Klaus Aeberhard, Urs Llado, Esther Alarcon Bläsi, Benedikt Burger, Sven Ehrler, Bruno Favre, Wilfried Fejfar, Antonín Gageot, Tristan Gordon, Ivan Helmers, Henning Höhn, Oliver Isabella, Olindo Jošt, Marko Ledinský, Martin Mandal, Jyotirmoy Manley, Phillip Muñoz, Delfina Omair, Zunaid Lizcano, Juan Camilo Ortiz Paetzold, Ulrich W. Raman, Aaswath P. Sai, Hitoshi Saive, Rebecca Schmid, Martina Yablonovitch, Eli Becker, Christiane Department Optics for Solar Energy Helmholtz-Zentrum Berlin für Materialien und Energie Kekuléstraße 5 Berlin12489 Germany Computational Nano Optics Zuse Institute Berlin Takustraße 7 Berlin14195 Germany Fluxim AG Katharina-Sulzer-Platz 2 Winterthur8400 Switzerland LMPV-Sustainable Energy Materials Department AMOLF Science Park 104 Amsterdam1098 XG Netherlands Fraunhofer Institute for Solar Energy Systems ISE Heidenhofstraße 2 Freiburg79100 Germany JCMwave GmbH Bolivarallee 22 Berlin14050 Germany Université Grenoble Alpes CEA LITEN Campus INES 50 avenue du Lac Léman Le Bourget-du-Lac73375 France FZU - Institute of Physics The Czech Academy of Sciences Na Slovance 1999/2 Prague 8182 00 Czech Republic IMEC/Energyville Thor Park 8320 Genk3600 Belgium Hasselt University Martelarenlaan 42 Hasselt3500 Belgium Photovoltaic Materials and Devices Laboratory Delft University of Technology Mekelweg 4 Delft2628 CD Netherlands University of Freiburg Emmy-Noether-Str.2 Freiburg79110 Germany Faculty of Electrical Engineering University of Ljubljana Tržaška 25 Ljubljana1000 Slovenia Department of Civil and Environmental Engineering Princeton University E209A Engineering Quadrangle PrincetonNJ08544 United States Department of Electrical Engineering and Computer Sciences University of California BerkeleyCA94720 United States Institute of Microstructure Technology Karlsruhe Institute of Technology Eggenstein-Leopoldshafen76344 Germany Light Technology Institute Karlsruhe Institute of Technology Karlsruhe76131 Germany Department of Materials Science and Engineering University of California Los AngelesCA90095 United States Ibaraki Tsukuba305-8568 Japan MESA+ Institute for Nanotechnology Inorganic Materials Science University of Twente NB Enschede7522 Netherlands University of Duisburg-Essen Forsthausweg 2 Duisburg47057 Germany Faculty 1 School of Engineering – Energy and Information Hochschule für Technik und Wirtschaft Berlin

In this section, we described the various device architectures in production for crystalline-silicon PV as well as the various absorber materials being used and developed for thin-film PV. We also explained why multijunction PV technology is considered the future of PV technology. We identified four major technological challenges (Fig. 1) for future mass production and deployment of PV technology in order to achieve the goal of climate neutrality and indicated how optics could help resolve these challenges. The four main challenges (Fig. 1) are: • Sustainable production of PV systems;• Higher energy conversion efficiencies;• Higher energy output and operational lifetime;• Integration of PV systems in their environment. © 2025 Optica Publishing Group (formerly OSA). All rights reserved.

关键词： Energy conversion efficiency

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On Algebraic Immunity of Trace Inverse Functions on Finite Fields of Characteristic Two

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Journal of systems Science & Complexity 2016年第1期29卷 272-288页

作者： FENG Xiutao GONG Guang Key Laboratory of Mathematics Mechanization Academy of Mathematics and Systems ScienceChinese Academy of Sciences State Key Laboratory of Information Security(Institute of Information Engineering Chinese Academy of Sciences) Department of Electrical and Computer Engineering University of Waterloo

The trace inverse functions Tr(λx^(-1)) over the finite field F_(2~n) are a class of very important Boolean functions and are used in many stream ciphers such as SFINKS,RAKAPOSHI,the simple counter stream cipher(SCSC) presented by Si W and Ding C(2012),*** order to evaluate the security of those ciphers in resistance to(fast) algebraic attacks,the authors need to characterize algebraic properties of Tr(λx^(-1)).However,currently only some bounds on algebraic immunity of Tr(λx^(-1)) are given in the public literature,for example,the NGG upper bound and the Bayev lower bound,*** paper gives the exact value of the algebraic immunity of Tr(λx^(-1)) over F_(2~n),that is,AI(Tr(λx^(-1))) =[2n^(1/2)]- 2,where n ≥ 2,A ∈ F_(2~n) and λ≠ 0,which shows that Dalai's conjecture on the algebraic immunity of Tr(λx^(-1)) is *** is more,the authors demonstrate some weak properties of Tr(λx^(-1)) against fast algebraic attacks.

关键词： Algebraic immunity boolean functions fast algebraic attacks trace inverse functions

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