Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 36 for “"lookup-table"”.
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Micro-architectural analysis of SPACERAM processing element
… blocks by applying appropriate shifting and lookup table updates to them. Every processing element contains a permuter which makes it possible to assign data bits from any DRAM block to any functional block within the processing element as specified by controller setup. The lookup table is …
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Tutorial on designing and simulating a truncation spurs-free direct digital synthesizer (DDS) on a field-programmable gate array (FPGA)
… DDS design. In order to minimize the size of the lookup table to save hardware and lower the power consumption, we normally truncate the phase word output from the phase accumulator in the standard approach of designing DDS. However, this process will generate spurious frequencies (spurs), which …
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Simulating urban growth for Baltimore-Washington metropolitan area by coupling SLEUTH model and population projection
… impervious surface area, we further developed a lookup table approach to integrate SLEUTH out and generated spatially explicit urban map for 2050. This lookup table approach has high potential to integrate population-predicted and SLEUTH-predicted urban landscape, especially when future …
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Flexibility of knowledge as a function of practice and explicit instruction
… knowledge of this task is represented by a lookup table, not a set of tuned strategies. With practice, transfer to a new task was achieved through an extrapolation procedure. Experiment 2 demonstrated far superior task and transfer performance in participants trained with a combination of …
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Integrating Sub-Centimeter Resolution Photogrammetry with a Surface Roughness Correction Factor Applied to PI-SWERL Measurements
… presents a summary of the development of the Portable In-situ Wind Erosion Laboratory (i.e., PI-SWERL) along with existing limitations for adjusting dust emission measurements for microtopographic surface roughness. A new method for characterizing the surface roughness correction factor, alpha …
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Vision-based proprioception of a soft robotic finger with tactile sensing
… These robots are more versatile, adaptable, safe, robust, and dexterous than their conventional rigid-body counterparts. However, due to their high-dimensionality and flexibility, they still lack a quintessential human ability: the ability to accurately perceive themselves and the …
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OpenKV: LSM-tree-based key-value store for open-channel SSD
… amplification, and we have designed a central lookup table based on the cuckoo filter to utilize the open-channel SSD's direct page-level access. In our evaluation we show that compared to LevelDB, our design can reduce write traffic by 2.6x to 3.5x while improving random read performance by up …
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Design and analysis of high-speed optical correlators for multiwavelength optical header recognition and optical code division multiple access
… pattern matches a predetermined pattern in the lookup table, while for other bit patterns, only low intensity (below a threshold level) cross-correlation functions are produced. As a result, these structures eliminate the bottleneck that exists in the conventional ortical packet switching …
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Optimal Vibration Suppression Using On-line Pole/Zero Identification
… spacings. The parameters are then stored in a lookup table in the realtime controller, and a frequency sweep algorithm identifies the pole-zero spacing on-line and designs the PPF filters using the parameters in the lookup table. A Phase-Locked Loop (PLL) was also studied as a means for …
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The Multimodal Interaction through the Design of Data Glove
… on support vector machine (SVM) as well as the lookup table. The detailed design and information is presented in this thesis. In the end, the system achieves supporting over 30 kinds of touch commands, 18 kinds of finger formation, and 10 kinds of hand postures as well as the combination of …
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Semi-active control for independently rotating wheelset in railway vehicles with MR dampers
… controllerThis research is a combination of a lookup table based on the inverse MR damper model to control the current input (to the MR damper) from required force and relative velocity of the device. The MR damper produces the desired force as precisely as possible. However, it is not possible …
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Analytical and experimental investigation of a 1/5 scale rail vehicle simulator
… roller rig. The nonlinear model incorporates a lookup table For the wheel/rail geometric constraints, a heuristic creep force model to take into account creep force saturation, and it includes the effects of Coulomb friction in the truck bearings. The linear model predicts the truck's natural …
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Frequency Scan–Based Mitigation Approach of Subsynchronous Control Interaction in Type-3 Wind Turbines
… conducted using PSCAD/EMTDC software to build a lookup table and harmonic injection is used in a parallel configuration to obtain the impedance of the system. Once the impedance of the system is obtained then the value of the parameters is adjusted using the look-up table. Harmonic injection is …
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Fault tolerance issues in nanoelectronics
… traditional techniques are found to be unsuitable. A new technique, in which the voting approach of triple modular redundancy (TMR) is extended by cascading TMR units composed of nanogate clusters, is proposed and generalised to other voting approaches. For memory chips, an error correcting …
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Approximate Dynamic Programming with Applications
… law can be computed and how the resulting lookup table can be reduced efficiently.The on-line implementation of receding horizon controllers, even for linear systems, is usually restricted to systems with slow dynamics. One reason for this is that the delay between measurement and actuation …
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Architecture and CAD for carbon nanomaterial integrated circuits
… are developed and characterized, including a lookup table created entirely from continuous CNT arrays. To determine the performance of these building blocks, variation-aware physical design tools are used, with statistical timing analysis that can handle both Gaussian and non-Gaussian random …
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Reinforcement learning in continuous state- and action-space
… store the values of all state-action pairs in a lookup table, due to both storage limitations and the inability to visit all states sufficiently often to learn the correct values. This can be overcome with the use of function approximation techniques with generalisation capability, such as …
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Splined Speed Control using SpAM (Speed-based Acceleration Maps) for an Autonomous Ground Vehicle
… speed to its desired speed. It then uses a lookup table to determine the correct pedal position (throttle or brake) using the current vehicle speed and a desired instantaneous acceleration that was determined in the splining step of the algorithm. Once the pedal position is determined a PI …
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Sensitivity of Diffuse Reflectance Spectroscopy to Dose- and Depth-dependent Changes in Tumor Oxygenation after Radiation Therapy
… extraction of optical parameters using one-layer Lookup Table (LUT) model. The second aim is to determine depth- and dose-dependent changes in DRS-measured vascular oxygenation during radiotherapy. The third aim is to determine the association between DRS-measured vascular oxygenation and …
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Investigation of Acceleration Dependent Nonlinear Lubricated Friction in Hydraulic Actuation Systems
… temperature and pressure. To enable repeatable data collection for the different friction conditions and to accommodate for the effect of hysteresis, a periodic parabolic displacement waveform was chosen which enabled the acceleration to be a family parameter. The second phase of the …
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