93results about How to "Function optimization" patented technology

A method for deploying a prosthetic valve assembly is provided. The prosthetic valve assembly replaces a deficient native valve and comprises a replacement valve supported on an expandable valve support. The valve support, which entirely supports the valve annulus, valve leaflets, and valve commissure points, is configured to be collapsible for transluminal delivery and expandable to contact the anatomical annulus of the native valve when the assembly is properly positioned. Portions of the valve support may expand to a preset diameter to maintain coaptivity of the replacement valve and to prevent occlusion of the coronary oslia. The prosthetic valve assembly is compressible about a catheter, and restrained from expanding by an outer sheath. The catheter may be inserted inside a lumen within the body, such as the femoral artery, and delivered to a desired location, such as the heart.

A prosthetic valve assembly for use in replacing a deficient native valve comprises a replacement valve supported on an expandable prosthesis frame. The valve may be delivered transluminally or transmyocardially using a thorascopic or other limited access approach using a delivery catheter. Preferably, the initial partial expansion of the valve is performed against the native valve annulus to provide adequate anchoring and positioning of the valve as the remaining portions of the valve expand. The valve may be delivered using a retrograde or antegrade approach. When delivered using a retrograde approach, a delivery catheter with a pull-back sheath may be used, while antegrade delivery is preferably performed with a delivery catheter with a push-forward sheath that releases the proximal end of the valve first.

A prosthetic valve assembly for use in replacing a deficient native valve comprises a replacement valve supported on an expandable valve support. If desired, one or more anchor may be used. The valve support, which entirely supports the valve annulus, valve leaflets, and valve commissure points, is configured to be collapsible for transluminal delivery and expandable to contact the anatomical annulus of the native valve when the assembly is properly positioned. The anchor engages the lumen wall when expanded and prevents substantial migration of the valve assembly when positioned in place. The prosthetic valve assembly is compressible about a catheter, and restrained from expanding by an outer sheath. The catheter may be inserted inside a lumen within the body, such as the femoral artery, and delivered to a desired location, such as the heart. When the outer sheath is retracted, the prosthetic valve assembly expands to an expanded position such that the valve and valve support expand within the deficient native valve, and the anchor engages the lumen wall.

Methods for delivering a prosthetic heart valve include advancing a delivery catheter containing the prosthetic heart valve to a deployment location at a native heart valve, advancing an inner core movably coupled to a restraining sheath of the delivery catheter to expose a first end of the prosthetic heart valve, and advancing the inner core and the restraining sheath to expose a second end of the prosthetic heart valve. The delivery catheter can include a distal flange located at a distal end of an outer core of the catheter body, configured to restrict distal longitudinal displacement of the prosthetic heart valve, and a retaining structure located proximally from the distal flange along the outer core of the catheter body, configured to restrict proximal longitudinal displacement of the prosthetic heart valve.

A novel and useful apparatus for and method of multiple input multiple output (MIMO) detection for use in MIMO based communication systems. The mechanism of the invention performs a simplified tree search utilizing a single stage expansion of the most likely first symbol candidates, in the case of a 2×2 MIMO system. The invention also provides a refinement mechanism operative to significantly improve the soft information (i.e. log likelihood ratio) of the list of candidates. To improve the soft information, the mechanism applies one or more refinement rounds to generate additional candidates for both first and second detected symbols.

Provided is an antenna system for tracking a satellite which includes a fixed body and a rotating body. The antenna system includes a transmitting / receiving unit having a transmitting channel and a receiving channel for signal power, a driving unit for enabling mechanical motion of the rotating body for satellite tracking, and a control unit for monitoring and controlling the operation of the driving unit. Accordingly, the various kinds of the components of the antenna system mounted and operated on the movable body can be minimized and the output of the transmitted signal required in the antenna system can be simply replaced, thereby simplifying the configuration of the system and reducing the production cost of the system. In addition, the STR having the tracking signal processing function in the digital mode as well as the general analog mode is mounted on the antenna system, thereby improving accuracy of satellite tracking. Moreover, the posture of the antenna system can be stably maintained regardless of the motion of the movable body in the moving environment by using the driving unit and the control unit which are designed for stably controlling the elevation, azimuth and antenna rotating angle, thereby improving communication performance that is the intrinsic object of the antenna system.

Disclosed are method, system, and computer program product for a method and system for a fast and stable placement / floorplanning method that gives consistent and good quality results. Various embodiments of the present invention provide a method and system for approximate placement of various standard cells, macro-blocks, and I / O pads for the design of integrated circuits by approximating the final shapes of the objects of interest by one or more probability distribution functions over the areas for the objects of interest with improved runtime and very good stability. These probability distributions are gradually localized to final shapes satisfying the placement constraints and optimizing an objective function.

A prosthetic valve comprises a valve assembly having a base, a plurality of leaflets, and commissures. The valve also comprises a support stent having a plurality of expandable cells and a plurality of longitudinal struts. The support stent is configured to be collapsible for transluminal delivery and expandable to contact the anatomical annulus of the native valve when the prosthetic valve is positioned in situ. The support stent supports the base. The commissures of the valve assembly are secured at the longitudinal struts and adjacent one or more of the expandable cells. The longitudinal struts of the support stent further comprise a plurality of holes, and the plurality of leaflets are secured to the longitudinal struts via threads passing through the plurality of holes.

The present invention is directed to an improved container closure or lever cap comprising one or more of the following features: (i) an improved interface on the interior surface of the closure that consists of strategically positioned locking lugs to securely affix the closure onto a container, (ii) a repositioned lever handle and fulcrum to optimize function and mechanical advantage, (iii) a retro-fit sleeve for an incompatible container, which on the inner surface is fashioned to interface with twist necks bottles, or other closure designs and mechanisms incompatible with the interior fitting of the lever cap, and which on the exterior is fashioned to receive the interior fitting of the lever cap, (iv) a tamper-evident safety indicator, (v) a specialized vertical sloping sidewall at the container's distal end near the opening to improve the closure's vertical lift during operation, (vi) a child safety design and mechanism that requires two functions to unlock the lever and position it for normal operation, and (vii) certain ergonomic, aesthetic, and customizable features that improve its function and consumer appeal.

It is made possible to optimize the effective work function of the metal for a junction and suppress the resistance as far as possible at the interface between a semiconductor or a dielectric material and a metal. A semiconductor device includes: a semiconductor film; a Ti oxide film formed on the semiconductor film, and including at least one element selected from the group consisting of V, Cr, Mn, Fe, Co, Ni, Nb, Mo, Tc, Ru, Rh, Pd, Ta, W, Re, Os, Ir, and Pt; and a metal film formed on the Ti oxide film.