Quotables
"It is my heart-warmed and world-embracing Christmas hope and aspiration that all of us, the high, the low, the rich, the poor, the admired, the despised, the loved, the hated, the civilized, the savage (every man and brother of us all throughout the whole earth), may eventually be gathered together in a heaven of everlasting rest and peace and bliss, except the inventor of the telephone. "
Mark Twain ; Christmas greetings, 1890
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| Number | Title | Issue Date |
| 7587442 | Method of determining the derivative of an input signal The derivative of a noise-containing input signal is determined by using an aliased derivative to periodically reset a filtered version of a normally determined derivative. The aliased derivative is calculated using a slower update or sampling rate than the normally... | 09/08/2009 |
| 7194497 | Hardware-based accelerator for time-domain scientific computing The present invention is directed to an apparatus and methods that facilitate implementation of a practical Finite-Difference-Time-Domain (FDTD) hardware accelerator. The apparatus and methods of the present invention increase speed, reduce memory requirements, and/... | 03/20/2007 |
| 7170959 | Tailored response cascaded integrator comb digital filter and methodology for parallel integrator processing A tailored response cascaded integrator comb digital filter is disclosed which has a cascaded integrator structure, a cascaded comb structure, a first rate change component, a second rate change component and can additionally include a resonator. The improved struct... | 01/30/2007 |
| 7076516 | Efficient method of identifying non-solution or non-optimal regions of the domain of a function A method of identifying one or more regions of the domain of a function that do not contain solutions is described along with a related subdivision method. These methods may be employed in the context of branch and bound methods that use interval analysis to search ... | 07/11/2006 |
| 6920472 | Termination criteria for the interval version of Newton's method for solving systems of non-linear equations One embodiment of the present invention provides a system for finding the roots of a system of nonlinear equations within an interval vector X=(X1, . . . , Xn), wherein the system of non-linear equations is specified by a vector function ƒ=(ƒ... | 07/19/2005 |
| 6915320 | Termination criteria for the one-dimensional interval version of newton's method One embodiment of the present invention provides a system for finding zeros of a function, ƒ, within an interval, X, using the interval version of Newton's method. The system operates by receiving a representation of the interval X. This representation including a ... | 07/05/2005 |
| 6836783 | Finite-difference solver based on field programmable interconnect devices A method for solving a wide variety of linear partial differential equations by exploiting the normally undesirable parasitic resistances present in flexible digital switching components. The terminal relationships of these field programmable interconnect devices ca... | 12/28/2004 |
| 6581082 | Reduced gate count differentiator A polynomial expansion of the z-transform characterization of an n'th order differentiator component's output is utilized to implement a differentiator having reduced gates. The differentiator component comprises at least one adder and a plurality of latc... | 06/17/2003 |
| 6457033 | Method of predicting diffusion state and apparatus for analyzing same An apparatus and method which is capable of solving a diffusion equation at a high precision by Fourier expansion. Diffusion quantity f, when a diffusion source s is provided, is determined by Fourier-transforming spacial components of f(r, t) and s(r, t)... | 09/24/2002 |
| 6446105 | Method and medium for operating a vector computer Method is provided for calculating a matrix by using a vector computer with at least one vector processor and a plurality of memory banks. The method controls procedure of the calculation so that the memory banks may be accessed in a constant stride. Furt... | 09/03/2002 |
| 5748672 | System for measuring jitter in a non-binary digital signal To measure various frequency components of the jitter of the deviation of the transition times in a signal on a signal line (44) from nominal bit times, a sampler (40) samples the signal at a rate high enough to determine the transition time with the requ... | 05/05/1998 |
| 5631858 | System for obtaining strict solution in accordance with accuracy of approximate solutions A multiplication, division and square root extraction apparatus which calculates the solutions to addition, division and square root extraction functions by approximation using iteration has a multiplier, an adder-subtracter and a shifter of prescribed bi... | 05/20/1997 |
| 5526475 | Method for live symbolic calculations in a mathematical document editor A mathematical document editor that can perform live symbolic calculations. The mathematical document editor is capable of placing mathematical expressions at any position on a computer screen, that represents a printed document. A symbolic dependency gra... | 06/11/1996 |
| 4875182 | Miniature digital computer circuit for determining values of combined varying quantities A miniature digital computer circuit capable of operating in substantially instantaneous real time for determining values of combined varying quantities. The circuit has inputs for two variable digital pulse trains. A decoder and shift register compress b... | 10/17/1989 |
| 4817027 | Method and apparatus for evaluating partial derivatives The present invention provides a novel method and apparatus for the automatic evaluation of partial derivatives. A computer memory system is organized and controlled so that partial derivatives are evaluated, without approximation, for any given function ... | 03/28/1989 |
| 4714866 | Rate-of-change signal generator using sampling techniques There is disclosed herein an apparatus and method for generating a first signal related to the rate of change of a second signal. In particular, a system is disclosed for generating a velocity signal in a sampled data servo system. The apparatus uses thre... | 12/22/1987 |
| 4471451 | Digital data sense amplifier and signal differentiator A digital data sense amplifier is disclosed for detecting small signal outputs from a storage media or from input sensors and comprises a differential amplifier whose outputs are coupled via two capacitors to an offset circuit which generates two offsets ... | 09/11/1984 |
| 4453181 | Scanning-image forming apparatus using photo response signal A scanning-image forming apparatus using a photo-response signal according to this invention is constructed so that the photo-response signal obtained by scanning the surface of a semiconductor specimen with a photon beam is subjected to a 2nd differentia... | 06/05/1984 |
| 4409667 | Process and device for the derivation of an analog electric signal The present invention relates to a process and device for obtaining the derivation of an analog electric signal P varying slowly as a function of a variable t. According to the invention, a combination of analog means, digital means, analog-to-digital con... | 10/11/1983 |
| 4356726 | Apparatus for detecting grade of vehicle from atmospheric pressure difference Two hermetically sealed chambers alternately hold the atmospheric pressure in response to a timing pulse generated each time a vehicle travels a predetermined distance. The difference between the atmospheric pressures held in the sealed chambers is detect... | 11/02/1982 |
| 4289397 | Laser ceilometer signal processing means For use in a pulsed-laser lidar such as a laser ceilometer, there are shown several examples of signal processing means for separating desired pulses due to targets such as clouds from strong background signals due to suspended particles causing poor visi... | 09/15/1981 |
| 4112499 | Digital transient discriminator with noise spike clipping A digital discriminator having circuit means for discriminating a unidirectional transient in the input signal over a two or more compute cycle period. Noise spike clipping by providing a programmable constant in a feedback circuit is disclosed and serves... | 09/05/1978 |
