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检索条件"主题词=Algorithm Development"

共 1739 条记录，以下是81-90 订阅

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OPTIMAL-CONTROL OF POSITIVE OPTICAL PHOTORESIST development

OPTIMAL-CONTROL OF POSITIVE OPTICAL PHOTORESIST DEVELOPMENT

引用

5TH ANNUAL CONF ON INTEGRATED CIRCUIT METROLOGY, INSPECTION, AND PROCESS CONTROL

作者： CARROLL, TA RAMIREZ, WF Univ. of Colorado/Boulder (United States)

ISBN: (纸本)0819405639

This work considers the modeling and control of positive optical photoresist development. The control effort is applied to this final process step in order to compensate for deviations in previous irreversible steps. A new approach to line-width control is studied. State estimation, combining interferometric development measurements with a process model, is used to calculate the time at which developer breakthrough to the substrate occurs. Parameter identification is used to determine any sample-to-sample changes in the process model. The optimal control policy is shown to be bang-bang with switching at the final time. A model describing development after breakthrough is derived and used to calculate the final developer shutoff time, based upon an on-line identified development process parameter. The policy is tested experimentally on different batches of the same resist type. Results indicate that accurate control is achieved, despite changes in environmental conditions and unexpected transient disturbances.

关键词： Photoresist developing Photoresist materials Process modeling algorithm development Data modeling Process control Picture Archiving and Communication System Integrated circuits Statistical modeling Switching

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development OF A PAIN SIGNALING SYSTEM USING MACHINE LEARNING

DEVELOPMENT OF A PAIN SIGNALING SYSTEM USING MACHINE LEARNIN...

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IEEE International Conference on Acoustics, Speech, and Signal Processing (ICASSP)

作者： Korving, Helen Li, Sheng Zhou, Di Sterkenburg, Paula Markopoulos, Panos Barakova, Emilia Eindhoven Univ Technol Dept Ind Design Eindhoven Netherlands Vrije Univ Amsterdam Dept Child & Family Studies Amsterdam Netherlands Nanjing Univ Sci & Technol Sch Design Arts & Media Nanjing Peoples R China Bartimeus Doorn Netherlands

ISBN: (纸本)9798350302615

A wearable pain signaling system is introduced, to be used in the daily care for people with severe and profound intellectual disabilities. Due to several medical disorders, this group of people can experience daily acute pain and chronic pain, which they have trouble expressing and communicating to caregivers. The system consists of a smart sock with fabric sensors, a sensor unit sending a 6A current through the smart sock receiving electrodermal response and a mobile application containing a machine learning algorithm translating the signal. The pain signaling algorithm uses data of one to five painful stimuli from 28 healthy participants. Random forest modeling was used to classify moments of pain and train a model to predict pain from new data. The algorithm's accuracy could be improved by an ensemble of five models and voting, so this groundbreaking system can become a much-wanted attribution to daily caregiving of people with disabilities.

关键词： Pain signaling electrodermal activity wearable sensor smart sock algorithm development

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development of an improved FRET imaging two-photon microscope combining lifetime and spectral imaging

Development of an improved FRET imaging two-photon microscop...

引用

Conference on Multiphoton Microscopy in the Biomedical Sciences IV

作者： Pelet, S Previte, MJR Kim, KH So, PTC MIT Biol Engn Div Cambridge MA 02139 USA

ISBN: (纸本)0819452319

FRET imaging is widely used in biology to map protein interactions in living cells. A number of recent technical developments promise to provide more accurate and quantitative measurement FRET efficiencies and protein bonding ratio. Using a reference FRET construct based on a doubly labeled DNA, one can estimate the accuracy of different techniques like spectral or lifetime imaging to resolve FRET. Further improvement have lead to the possibility of measuring in a single detector both spectral and lifetime information from the fluorescence emitted by the sample. We are currently building such a system based on an intensity modulated multi-anode PMT and have developed a global fitting algorithm to extract valuable information from combined spectral and lifetime imaging data sets.

关键词： Fluorescence resonance energy transfer Modulation Luminescence Imaging spectroscopy Phase shift keying Fluorescence lifetime imaging Microscopes algorithm development Proteins Phase measurement

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development OF AUTONOMOUS TECHNIQUES FOR FIGURE CONTROL OF A DEFORMABLE MIRROR

DEVELOPMENT OF AUTONOMOUS TECHNIQUES FOR FIGURE CONTROL OF A...

引用

Conference on Optical Alignment

作者： BAILEY, AW BUITENHUYS, WJ CIELINSKI, AJ SMITH, MA W J SCHAFER ASSOCIATES INC CHELMSFORDMA 01824

ISBN: (纸本)0819412457

Techniques for autonomous alignment of beam control systems have been developed for a number of technologies including laser resonators, telescopes, diagnostic systems and components. These techniques have been designed to perform remote autonomous alignment on space based optical systems. An approach building upon these techniques has been developed for autonomous figure control of multi-actuator deformable mirrors. The algorithm used is a multidimensional minimization algorithm based upon the downhill simplex method of Nelder and Mead. This method is well-known for its extreme robustness and its broad applicability to a large variety of problems. In this paper results from numerical studies are presented that demonstrate the ability of this method in performing figure control of a deformable mirror. It is shown that the number of iterations required for the algorithm to converge to a practical solution grows linearly with the number of degrees of freedom. Near optimal numeric solutions are attainable, however, the required number of iterations increases non-linearly.

关键词： Actuators Deformable mirrors Wavefronts algorithm development Optical alignment Control systems Tolerancing Computer simulations Mirrors Space telescopes

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development and enhancement of mobile robot arms for EOD applications

Development and enhancement of mobile robot arms for EOD app...

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Conference on Unmanned Systems Technology X

作者： Berkemeier, Matthew Poulson, Eric Aston, Eric Johnston, Josh Smith, Brian Autonomous Solut Inc Petersboro UT 84325 USA

ISBN: (纸本)9780819471536

Autonomous Solutions has multiple projects involving mobile robot arms for EOD applications. This paper will describe 3 such projects. In the first, a 5 DOF robot arm of our own design is mounted on a 4-wheeled omni-directional platform. The arm is capable of lifting 100 pounds at close to full extension, and it can lift significantly more at shorter distances. The operator can specify either individual joint control or "fly the gripper" control, where the individual joint velocities are automatically calculated in response to commanded gripper velocities. In the second project, 3D data of a scene of interest is gathered and then presented to the EOD technician, along with a representation of the arm. The technician can then rotate the scene and arm to obtain the best possible view for the task. In the final project, a 3 DOF arm will be mounted to an omni-directional platform. The arm and platform will be treated as a single 6 DOF manipulator, and the operator will specify 6 DOF gripper velocity commands using a 6-axis input device, such as those used for solid modeling programs.

关键词： Sensors Data modeling 3D visualizations Mobile robots algorithm development Stereoscopic cameras Kinematics Solids Control systems Solid modeling

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development OF AN ACTUATOR POWER-FACTOR METER FOR EXPERIMENTAL-DETERMINATION OF THE OPTIMAL ACTUATOR LOCATION ON COMPLEX STRUCTURES

DEVELOPMENT OF AN ACTUATOR POWER-FACTOR METER FOR EXPERIMENT...

引用

Smart Structures and Materials 1994 Conference - Smart Structures and Intelligent Systems

作者： LIANG, C SUN, FP ROGERS, CA VIRGINIA POLYTECH INST & STATE UNIV CTR INTELLIGENT MAT SYST & STRUCTBLACKSBURGVA 24061

ISBN: (纸本)0819414859

Actuator power factor, defined as the ratio of structural dissipative mechanical power to apparent supplied electrical power, describes the effectiveness of the integrated actuators to convert supplied electrical power to mechanical power which creates the intended structural response. A large actuator power factor in the frequency range of application indicates that the corresponding actuator (position) has a higher authority to excite its host structure in that frequency range than positions with a lower power factor. The use of acutator power factor provides an alternate tool in the determination of the optimal actuator locations and dimensions to theoretical calculations. More importantly, the power factor can be experimentally measured on large-scale complex structures, thereby eliminating the need for sophisticated theoretical modeling. The concept of an actuator power factor was first introduced by the authors (Liang et al., 1993a) and will be briefly described herein. The utility of using the actuator power factor in optimizing an actuator system will then be illustrated using a numerical case study. The hardware development of the actuator power factor meter will be presented. The application of actuator power factor meter for optimal experimental actuator placement will be discussed.

关键词： Actuators Ferroelectric materials Dielectrics Acoustics Active vibration control Signal attenuation algorithm development Aluminum Linear filtering Sun

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SOFTWARE-development TOOLS FOR IMPLEMENTING VISION SYSTEMS ON MULTIPROCESSORS

SOFTWARE-DEVELOPMENT TOOLS FOR IMPLEMENTING VISION SYSTEMS O...

引用

CONF ON IMAGE UNDERSTANDING IN THE 90S : BUILDING SYSTEMS THAT WORK

作者： CHOUDHARY, A RANKA, S Syracuse Univ. (United States)

ISBN: (纸本)0819404969

A methodology and supporting software tools for obtaining insight and quantitative measures on the accuracy of ATC (automatic target cueing) algorithms are described. algorithm accuracy is characterized by trade-off curves in which selected performance measures are plotted against each other over a range of algorithm operating points. Performance trade-off curves determined as a function of critical sensor, target and background parameters allow algorithm sensitivity issues to be investigated and provide a basis for evaluating algorithm accuracy effects in the context of specific missions. The evaluation process is founded on an ATC experiment design which defines a challenging but representative "cut" through the multidimensional scenario space associated with the mission under consideration. The experiment design is included in a written test plan which documents the mechanics of the evaluation process and specifies the amount and type of imagery that will be made available for algorithm development and evaluation. tolls for placing confidence bounds on hypothetical algorithm performance trade-off curves provide a basis for addressing the statistical data adequacy issue in relation to the experiment design.

关键词： Detection and tracking algorithms Software development algorithm development Image processing Mechanics Sensors

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development platform for self-organizing wireless sensor networks

Development platform for self-organizing wireless sensor net...

引用

Conference on Unattended Ground Sensor Technologies and Applications

作者： Agre, JR Clare, LP Pottie, GJ Romanov, NP Rockwell Sci Ctr Thousand Oaks CA 91360 USA

ISBN: (纸本)0819431877

Distributed microsensor networks, built from collections of nodes each having the ability to sense their environment, process the raw sensor data in cooperation with other neighboring nodes into information and then communicate that information to end users. These systems are designed to be self-organizing in the sense of establishing and maintaining their own network without the need for specialist operators. In most envisioned applications, wireless communications are the most practical means of interconnection, eliminating the internode cabling. Long periods of autonomous operations in remote environments will need battery or other renewable energy sources. In order to prolong battery life, all node hardware and software functions need to be designed to consume minimal power. In general, a node will expend energy on local processing of sensor data to produce compressed information in order to reduce communications. These network systems are intended to support large numbers of such nodes to cover large geographic areas. This presents technical challenges in areas such as low cost design, scalability, cooperative processing and reliable operation of complex systems. Such networks are finding applications in both the military and commercial arenas, and the UCLA/Rockwell Science Center team(1) has developed a prototype wireless sensor node, "AWAIRS I," as a development platform to examine many of the issues relating to their design, deployment and usage. These issues cover a broad spectrum, from determining the best sensors for particular applications, to constructing low power signal processing algorithms and robust and low power network protocols.

关键词： Sensors Microsensors Sensor networks Data communications Signal processing algorithm development Human-machine interfaces Prototyping Wireless communications Acoustics

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RECENT ADVANCES IN THE development AND TRANSFER OF MACHINE VISION TECHNOLOGIES FOR SPACE

RECENT ADVANCES IN THE DEVELOPMENT AND TRANSFER OF MACHINE V...

引用

CONF ON COOPERATIVE INTELLIGENT ROBOTICS IN SPACE

作者： DEFIGUEIREDO, RJP PENDLETON, T Univ. of California/Irvine (United States) NASA/Johnson Space Ctr. (United States)

Some of the recent work in which the authors have been involved on machine vision and technology transfer to space robotics is briefly described.

ISBN: (纸本)0819404543

Some of the recent work in which the authors have been involved on machine vision and technology transfer to space robotics is briefly described.

关键词： Data modeling Machine vision algorithm development Aerospace engineering Image processing Robotics Space robots Detection and tracking algorithms Space operations Object recognition

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Two new methods for simulating photolithography development in 3D

Two new methods for simulating photolithography development ...

引用

Conference on Optical Microlithography IX

作者： Helmsen, J Puckett, EG Colella, P Dorr, M LAWRENCE LIVERMORE NATL LAB CTR COMPUTAT SCI & ENGNLIVERMORECA 94550

ISBN: (纸本)0819421022

Two methods are presented for simulating the development of photolithographic profiles during the resist dissolution phase. These algorithms are the volume-of-fluid algorithm, and the steady level-set algorithm. These methods are compared with the ray-trace, cell and level- set techniques employed in SAMPLE-3D. The volume-of-fluid algorithm employs an Euclidean Grid with volume fractions. At each time step, the surface is reconstructed by computing an approximation of the tangent plane of the surface in each cell that contains a value between 0 and 1. The geometry constructed in this manner is used to determine flow velocity vectors and the flux across each edge. The material is then advanced by a split advection scheme. The steady level set algorithm is an extension of the iterative level set algorithm. The steady level set algorithm combines fast level set concepts and a technique for finding zero residual solutions to the eikonal function. The etch time for each cell is calculated in a time ordered manner. Use of heap sorting data structures allows the algorithm to execute extremely quickly. A similar technique was submitted by J. Sethian. Comparisons of the methods have been performed and the results are shown.

关键词： Etching Optical lithography Interfaces Photoresist materials algorithms Computer simulations Mathematics algorithm development Mechanics Photoresist developing

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