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caltechETD 檢索結果共 5156 筆,本頁資料從第 97 筆到第 108 筆

Successful high-speed autonomous navigation requires integration of tools from robotics, control theory, computer vision, and systems engineering. This thesis presents work that develops and combines these tools in the context of navigating desert terrain. A comparative analysis of reactive, behavior-based, and deliberative control architectures provides important guide....

By Lars B. Cremean--California Institute of Technology--2006-05-12
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This dissertation focuses on two theoretical research topics: Multiscale Simulations of Single-Walled Carbon Nanotube Atomic Force Microscopy (AFM, chapters 1 through 3) and Density Functional Theory Characterization of Functionalized and non-functionalized Silicon Surfaces (chapters 4 through 8). The first topic presents the development of an AFM simulation methodology....

By Santiago de Jesus Solares--California Institute of Technology--2006-05-11
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The main focus in this thesis is linear codes over rings. In the first part, we look at linear codes over Galois rings, and using the homogeneous weight, we improve upon Wilson's results about the prime power that divides the coefficients of the homogeneous weight enumerators of these codes. We also prove that our results are best possible. Our results about homogeneous....

By Bahattin Yildiz--California Institute of Technology--2006-05-10
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This thesis presents a concise introduction to the spectral-element method and its applications to the simulation of seismic wave propagation in 3-D earth models. The spectral-element method is implemented in the regional scale for a 3-D integrated southern California velocity model. Significantly better waveform fits are achieved for the 3-D synthetics calculated compa....

By Qinya Liu--California Institute of Technology--2006-05-09
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This thesis provides bounds on the performance of quantum error correcting codes when used for quantum communication and quantum key distribution. The first two chapters provide a bare-bones introduction to classical and quantum error correcting codes, respectively. The next four chapters present achievable rates for quantum codes in various scenarios. The final chapter....

By Graeme Stewart Baird Smith--California Institute of Technology--2006-05-08
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Shock-induced damage beneath impact craters is studied in this work. Two representative terrestrial rocks, San Marcos granite and Bedford limestone, are chosen as test target. Impacts into the rock targets with different combinations of projectile material, size, impact angle, and impact velocity are carried out at cm scale in the laboratory. Shock-induced damage and fr....

By Huirong Ai--California Institute of Technology--2006-05-08
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For a finite Galois extension $K/Q$ of number fields with Galois group $G$ and a motive $M = M' otimes h^0(Spec(K))(0)$ with coefficients in $Q[G]$, the equivariant Tamagawa number conjecture relates the special value $L^*(M,0)$ of the motivic $L$-function to an element of $K_0([G];R)$ constucted via complexes associated to $M$. The conjecture for nonabelian groups $G$ ....

By Tejaswi Navilarekallu--California Institute of Technology--2006-05-08
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The reactivity of the iron(II) alkyl species [PhBPiPr3]FeMe ([PhBPiPr3] = PhB(CH2PiPr2)3-) towards Si-H bonds is presented. Reaction of [PhBPiPr3]FeMe with primary aryl silanes results in the unusual η3 silane adducts [PhBPiPr3]Fe(H)(η3-H2SiMeR). X-ray crystallography, Mössbauer spectroscopy, and theoretical calculations confirm this structural assignment; ho....

By Christine Marie Thomas--California Institute of Technology--2006-05-08
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This thesis addresses the problem of inter-particle collisions in a viscous liquid. Experimental measurements were made on normal and oblique collisions between identical and dissimilar pairs of solid spheres. The experimental evidence supports the hypothesis that the normal and the tangential component of motions are decoupled during a rapid collision. The relative par....

By Fu-Ling Yang--California Institute of Technology--2006-05-05
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For a variety of applications, the capability of simultaneous sensing and action in multiple locations that is inherent to multi-robot approaches offers potential advantages over single robot systems in robustness, efficiency, and application feasibility. At the fully distributed and reactive end of the multi-robot system spectrum, I present mathematical modeling method....

By Kjerstin Irja Williams--California Institute of Technology--2006-05-05
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This thesis summarizes four of my research projects in machine learning. One of them is on a theoretical challenge of defining and exploring complexity measures for data sets; the others are about new and improved classification algorithms. We first investigate the role of data complexity in the context of binary classification problems. The universal data complexity is....

By Ling Li--California Institute of Technology--2006-05-04
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This thesis provides congruences between unstable and stable automorphic forms for the symplectic similitude group $GSp(4)$. More precisely, we raise the level of certain CAP representations $Pi$ of Saito-Kurokawa type, arising from classical modular forms $f in S_4(Gamma_0(N))$ of square-free level and root number $epsilon_f=-1$. We first transfer $Pi$ to a suitable in....

By Claus Mazanti Sorensen--California Institute of Technology--2006-05-04
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