Abstract: Methods for increasing the processing speed of computational electromagnetic methods, such as the Method of Moments (MoM), may involve using efficient mapping of algorithms onto a Graphics Processing Unit (GPU) architecture. Various methods may provide speed/complexity improvements to either or both of: (1) direct solution via Lower-Upper (LU) factorization; and (2) iterative methods (e.g., Generalized Minimal Residual (GMRES) method).

Abstract: Methods for increasing the processing speed of computational electromagnetic methods, such as the Method of Moments (MoM), may involve using efficient mapping of algorithms onto a Graphics Processing Unit (GPU) architecture. Various methods may provide speed/complexity improvements to either or both of: (1) direct solution via Lower-Upper (LU) factorization; and (2) iterative methods (e.g., Generalized Minimal Residual (GMRES) method).

Abstract: Disclosed herein is an organization of cache memory for hardware acceleration of the FDTD method. The organization of cache memory for hardware acceleration of the FDTD method provides a substantial speedup to the finite-difference time-domain (FDTD) algorithm when implemented in a piece of digital hardware. The organization of cache memory for hardware acceleration of the FDTD method utilizes a very high bandwidth dual-port on-chip memory in a particular way. By creating many small banks of internal memory and arranging them carefully, all data dependencies can be statically wired. This allows for a many-fold speedup over SRAM-based solutions and removes the burden of data dependence calculation that streaming SDRAM-based solutions must perform.

Abstract: A computer hardware configuration for performing the pseudo-spectral time-domain (PSTD) method on data. The hardware configuration includes a forward fast Fourier transform (FFT) unit that calculates a forward fast Fourier transform (FFT) from the data, and a complex multiplication unit that receives the FFT-processed data and calculates a spatial derivative in the frequency domain from the FFT-processed data. The hardware configuration further includes an inverse fast Fourier transform (IFFT) unit that converts the spatial derivative in the frequency domain from the complex multiplication unit into the time domain, and a computation engine that solves a PSTD equation based upon the spatial derivative in the time domain received from the IFFT unit.

Abstract: A wrapping machine (10) which retains a gathered leading edge of a wrapping material with a clamp (40) by a rotatable turntable (14) supporting a load (16) during at least initiation of wrapping of the load with the wrapping material in accordance with the invention including at least one wrapping material retaining mechanism (42, 44, 300), a wrapping material retaining mechanism being movable from a first position to a second position, the at least one wrapping material retaining mechanism in the second position retaining the wrapping material without gathering of the wrapping material; a wrapping material translating mechanism (52, 53, 55, 55', 57 or 300-316) carried by one of the at least one wrapping material retaining mechanism for translating the wrapping material retained by the at least one wrapping material retaining mechanism into the clamp to gather wrapping material within the clamp while the clamp is in an open position for retention of the gathered wrapping material when the clamp is closed; and

Abstract: A wrapping machine and operation for wrapping a load arranged on a pallet with a stretchable wrapping material under a substantially constant tension during the wrapping operation. The load that is to be wrapped is arranged on a support member which can be rotated for drawing off stretchable wrapping material from a roll of such material. A dispensing mechanism holds the roll of stretchable wrapping material and dispenses the material so that it can be wrapped around the load arranged on the support member. As an alternative to the support member with the load being rotated, the dispensing member can revolve around the support member and the load so as to dispense and wrap the load with the stretchable material. During the wrapping operation, the tension on the portion of the stretchable wrapping material being wrapped around the load is maintained at a substantially constant tension. Prior to actually wrapping the load with the stretchable wrapping material, such material can be prestretched.

Abstract: A stretch wrapping machine is disclosed having a prestretcher having a single driven roller and a controlled supply roll of stretchable wrapping material. In several embodiments, a variable ratio transmission varies the ratio of the rotational velocity of the driven roller and the rotational velocity of the supply roll to maintain a substantially constant ratio of the peripheral velocity of the driven roller to the peripheral velocity of the supply roll. In several embodiments, a brake applies a variable braking force to the supply roll to maintain a substantially constant ratio of the peripheral velocity of the driven roller to the peripheral velocity of the driven roller.

Abstract: A wrapping machine and operation for wrapping a load arranged on a pallet with a stretchable wrapping material under a substantially constant tension during the wrapping operation. The load that is to be wrapped is arranged on a support member which can be rotated for drawing off stretchable wrapping material from a roll of such material. A dispensing mechanism holds the roll of stretchable wrapping material and dispenses the material so that it can be wrapped around the load arranged on the support member. As an alternative to the support member with the load being rotated, the dispensing member can revolve around the support member and the load so as to dispense and wrap the load with the stretchable material. During the wrapping operation, the tension on the portion of the stretchable wrapping material being wrapped around the load is maintained at a substantially constant tension. Prior to actually wrapping the load with the stretchable wrapping material, such material can be prestretched.

Abstract: A stretch wrapping machine is disclosed having a prestretcher having a single driven roller and a controlled supply roll of stretchable wrapping material. In several embodiments, a variable ratio transmission varies the ratio of the rotational velocity of the driven roller and the rotational velocity of the supply roll to maintain a substantially constant ratio of the peripheral velocity of the driven roller to the peripheral velocity of the supply roll. In several embodiments, a brake applies a variable braking force to the supply roll to maintain a substantially constant ratio of the peripheral velocity of the driven roller to the peripheral velocity of the driven roller.

Abstract: A wrapping machine for wrapping a load in a unitary package. The load is supported on a rotatable support which can be rotated typically at speeds between 2 and 10 rpm. With the utilization of a variable speed DC motor drive in conjunction with an electronic control circuit, the speed of the support can be infinitely varied. As the support is rotated, a stretchable wrapping material is withdrawn from a rolled up sheet of such material and wrapped around the load due to the rotation of the support. A control mechanism controls the operation of the DC driving motor for causing the support to be rotated a plurality of turns for wrapping the load with the stretchable material being withdrawn from a dispensing mechanism. The control mechanism rotates the support at a first speed during a first portion of the rotatable movement of the support and then at a second slower speed during a subsequent portion of the rotatable movement of the support.

Abstract: A wrapping machine and operation for wrapping a load arranged on a pallet with a stretchable wrapping material under a substantially constant tension during the wrapping operation. The load that is to be wrapped is arranged on a support member which can be rotated for drawing off stretchable wrapping material from a roll of such material. A dispensing mechanism holds the roll of stretchable wrapping material and dispenses the material so that it can be wrapped around the load arranged on the support member. As an alternative to the support member with the load being rotated, the dispensing member can revolve around the support member and the load so as to dispense and wrap the load with the stretchable material. During the wrapping operation, the tension on the portion of the stretchable wrapping material being wrapped around the load is maintained at a substantially constant tension. Prior to actually wrapping the load with the stretchable wrapping material, such material can be prestretched.

Abstract: An automatic stretch wrapping machine is disclosed.

Abstract: Successive layers of stretch film are wrapped around a load stacked on a motor driven rotatable turntable, the film being supplied as the leading end of a web pulled off a rotatable non-driven roll, and rotation of the roll being initially positively restricted by a spring biased brake. Tension in the web is successively increased to automatically increase stretch in the web in stages during succeeding revolutions. An anchoring member is automatically projected to hold the pallet immovable on the table during wrapping.