Diffeomorphic Dimensionality Reduction (2009)
This paper introduces a new approach to constructing meaningful lower dimensional representations of sets of data points. We argue that constraining the mapping between the high and low dimensional...
Eurographics E. Gröller, L. Szirmay-kalos, C. Walder, B. Schölkopf, O. Chapelle
We consider the problem of constructing a globally smooth analytic function that represents a surface implicitly by way of its zero set, given sample points with surface normal vectors. The...
Sparse Multiscale Gaussian Process Regression (2008)
Walder, C., Kim, K.I., Schölkopf, B.
Most existing sparse Gaussian process (g.p.) models seek computational advantages by basing their computations on a set of m basis functions that are the covariance function of the g.p. with one of...
Sparse Multiscale Gaussian Process Regression (2008)
Walder, C., Kim, K.I., Schölkopf, B., Cohen, W. W., McCallum, A., Roweis, S. T.
Most existing sparse Gaussian process (g.p.) models seek computational advantages by basing their computations on a set of m basis functions that are the covariance function of the g.p. with one of...
Learning with Transformation Invariant Kernels (2008)
Walder, C., Chapelle, O., Platt, J. C., Koller, D., Singer, Y., Roweis, S.
This paper considers kernels invariant to translation, rotation and dilation. We show that no non-trivial positive definite (p.d.) kernels exist which are radial and dilation invariant, only...
Implicit Surfaces with Globally Regularised and Compactly Supported Basis Functions (2007)
Walder, C., Schölkopf, B., Chapelle, O.
We consider the problem of constructing a function whose zero set is to represent a surface, given sample points with surface normal vectors. The contributions include a novel means of regularising...
Implicit Surface Modelling with a Globally Regularised Basis of Compact Support (2006)
Walder, C, Schoelkopf, B, Chapelle, O
We consider the problem of constructing a globally smooth analytic function that represents a surface implicitly by way of its zero set, given sample points with surface normal vectors. The...
Implicit Surface Modelling with a Globally Regularised Basis of Compact Support (2006)
Walder, C., Schölkopf, B., Chapelle, O.
We consider the problem of constructing a globally smooth analytic function that represents a surface implicitly by way of its zero set, given sample points with surface normal vectors. The...
Implicit Surface Modelling as an Eigenvalue Problem (2005)
Walder, C., Chapelle, O., Schölkopf, B., Raedt, L. De, Wrobel, S.
We discuss the problem of fitting an implicit shape model to a set of points sampled from a co-dimension one manifold of arbitrary topology. The method solves a non-convex optimisation problem in the...
De Nucci, G, Thomas, R, D'Orleans-Juste, P, Antunes, E, Walder, C, Warner, T D, ...
Endothelin releases prostacyclin and thromboxane A2 from guinea pig or rat isolated lungs and endothelium-derived relaxing factor in the perfused mesentery of the rat. Endothelin is also...
De Nucci, G, Thomas, R, D'Orleans-Juste, P, Antunes, E, Walder, C, Warner, T D, ...
Endothelin releases prostacyclin and thromboxane A2 from guinea pig or rat isolated lungs and endothelium-derived relaxing factor in the perfused mesentery of the rat. Endothelin is also...
Thomas, G. R., Thiemermann, C., Walder, C., Vane, J. R.
1. The effects of sodium nitroprusside, acetylcholine and bradykinin on cardiac output and its distribution were studied in the anaesthetized, vagotomised rat preparation by use of 113Sn-labelled...
Cristol, J. P., Thiemermann, C., Mitchell, J. A., Walder, C., Vane, J. R.
1. Ischaemia-reperfusion injury in the kidney is associated with a loss of autoregulation, an increase in renal vascular resistance (RVR), a decrease of renal blood flow (RBF) and ultimately acute...